Levee editor compiled for RetroBSD.

SmallerC: generate smaller & faster code; bugfixes

Makefile

@@ -24,24 +24,23 @@ DUINOMITE       = sys/pic32/duinomite/DUINOMITE
 DUINOMITEUART   = sys/pic32/duinomite-uart/DUINOMITE-UART
 DUINOMITEE      = sys/pic32/duinomite-e/DUINOMITE-E
 DUINOMITEEUART  = sys/pic32/duinomite-e-uart/DUINOMITE-E-UART
-PINGUINO        = sys/pic32/pinguino-micro/PINGUINO-MICRO
-DIP             = sys/pic32/dip/DIP
 BAREMETAL       = sys/pic32/baremetal/BAREMETAL
-RETROONE	    = sys/pic32/retroone/RETROONE
-FUBARINO	    = sys/pic32/fubarino/FUBARINO
-FUBARINOBIG	    = sys/pic32/fubarino/FUBARINO-UART2CONS-UART1-SRAMC
+RETROONE        = sys/pic32/retroone/RETROONE
+FUBARINO        = sys/pic32/fubarino/FUBARINO
+FUBARINOBIG     = sys/pic32/fubarino/FUBARINO-UART2CONS-UART1-SRAMC
+SDXL            = sys/pic32/sdxl/SDXL
 MMBMX7          = sys/pic32/mmb-mx7/MMB-MX7
 
 # Select target board
 TARGET          ?= $(MAX32)
 
 # Filesystem and swap sizes.
-FS_KBYTES       = 102400
-U_KBYTES        = 102400
-SWAP_KBYTES     = 2048
+FS_MBYTES       = 100
+U_MBYTES        = 100
+SWAP_MBYTES     = 2
 
 # Set this to the device name for your SD card.  With this
-# enabled you can use "make installfs" to copy the filesys.img
+# enabled you can use "make installfs" to copy the sdcard.img
 # to the SD card.
 
 #SDCARD          = /dev/sdb
@@ -60,68 +59,13 @@ TARGETDIR    = $(shell dirname $(TARGET))
 TARGETNAME   = $(shell basename $(TARGET))
 TOPSRC       = $(shell pwd)
 CONFIG       = $(TOPSRC)/tools/configsys/config
-#
-# Filesystem contents.
-#
-BIN_FILES	:= $(wildcard bin/*)
-SBIN_FILES	:= $(wildcard sbin/*)
-GAMES_FILES	:= $(shell find games -type f ! -path '*/.*')
-LIBEXEC_FILES	:= $(wildcard libexec/*)
-LIB_FILES	:= lib/crt0.o lib/retroImage $(wildcard lib/*.a)
-ETC_FILES	= etc/rc etc/rc.local etc/ttys etc/gettytab etc/group \
-                  etc/passwd etc/shadow etc/fstab etc/motd etc/shells \
-                  etc/termcap etc/MAKEDEV etc/phones etc/remote
-INC_FILES	= $(wildcard include/*.h) \
-                  $(wildcard include/sys/*.h) \
-                  $(wildcard include/machine/*.h) \
-                  $(wildcard include/smallc/*.h) \
-                  $(wildcard include/smallc/sys/*.h) \
-                  $(wildcard include/arpa/*.h)
-SHARE_FILES	= share/re.help share/example/Makefile \
-                  share/example/ashello.S share/example/chello.c \
-                  share/example/blkjack.bas share/example/hilow.bas \
-                  share/example/stars.bas share/example/prime.scm \
-                  share/example/fact.fth share/example/echo.S \
-                  share/example/stdarg.c share/example/skeleton.c \
-                  $(wildcard share/smallc/*)
-MANFILES	= share/man/ share/man/cat1/ share/man/cat2/ share/man/cat3/ \
-		  share/man/cat4/ share/man/cat5/ share/man/cat6/ share/man/cat7/ \
-		  share/man/cat8/ $(wildcard share/man/cat?/*)
-ALLFILES	= $(SBIN_FILES) $(ETC_FILES) $(BIN_FILES) $(LIB_FILES) $(LIBEXEC_FILES) \
-                  $(INC_FILES) $(SHARE_FILES) $(GAMES_FILES) \
-                  var/log/messages var/log/wtmp .profile
-ALLDIRS         = games/ sbin/ bin/ dev/ etc/ tmp/ lib/ libexec/ share/ include/ \
-                  var/ u/ share/example/ share/misc/ share/smallc/ \
-                  var/run/ var/log/ var/lock/ games/ games/lib/ include/sys/ \
-                  include/machine/ include/arpa/ include/smallc/ \
-                  include/smallc/sys/ share/misc/ share/smallc/ include/sys/ \
-                  games/lib/
-BDEVS           = dev/rd0!b0:0 dev/rd0a!b0:1 dev/rd0b!b0:2 dev/rd0c!b0:3 dev/rd0d!b0:4
-BDEVS           += dev/rd1!b1:0 dev/rd1a!b1:1 dev/rd1b!b1:2 dev/rd1c!b1:3 dev/rd1d!b1:4
-BDEVS           += dev/rd2!b2:0 dev/rd2a!b2:1 dev/rd2b!b2:2 dev/rd2c!b2:3 dev/rd2d!b2:4
-BDEVS           += dev/rd3!b3:0 dev/rd3a!b3:1 dev/rd3b!b3:2 dev/rd3c!b3:3 dev/rd3d!b3:4
-BDEVS		    += dev/swap!b4:64 dev/swap0!b4:0 dev/swap1!b4:1 dev/swap2!b4:2
 
-D_CONSOLE        = dev/console!c0:0
-D_MEM		     = dev/mem!c1:0 dev/kmem!c1:1 dev/null!c1:2 dev/zero!c1:3
-D_TTY		     = dev/tty!c2:0
-D_FD		     = dev/stdin!c3:0 dev/stdout!c3:1 dev/stderr!c3:2
-D_TEMP           = dev/temp0!c4:0 dev/temp1!c4:1 dev/temp2!c4:2
-
-U_DIRS           = $(addsuffix /,$(shell find u -type d ! -path '*/.svn*'))
-U_FILES          = $(shell find u -type f ! -path '*/.svn/*')
-#U_ALL            = $(patsubst u/%,%,$(U_DIRS) $(U_FILES))
-
-CDEVS            = $(D_CONSOLE) $(D_MEM) $(D_TTY) $(D_FD) $(D_TEMP)
-
-all:            tools build kernel
-		$(MAKE) fs
-
-fs:             sdcard.rd
-
-.PHONY: 	tools
-tools:
+all:            .profile
 		$(MAKE) -C tools
+		$(MAKE) -C lib
+		$(MAKE) -C src install
+		$(MAKE) kernel
+		$(MAKE) fs
 
 kernel: 	$(TARGETDIR)/Makefile
 		$(MAKE) -C $(TARGETDIR)
@@ -129,39 +73,14 @@ kernel: 	$(TARGETDIR)/Makefile
 $(TARGETDIR)/Makefile: $(CONFIG) $(TARGETDIR)/$(TARGETNAME)
 		cd $(TARGETDIR) && ../../../tools/configsys/config $(TARGETNAME)
 
-.PHONY: 	lib
-lib:
-		$(MAKE) -C lib
+fs:             sdcard.img
 
-build: 		tools lib
-		$(MAKE) -C src install
-
-filesys.img:	$(FSUTIL) $(ALLFILES)
+.PHONY:         sdcard.img
+sdcard.img:	$(FSUTIL) rootfs.manifest userfs.manifest
 		rm -f $@
-		$(FSUTIL) -n$(FS_KBYTES) $@
-		$(FSUTIL) -a $@ $(ALLDIRS)
-		$(FSUTIL) -a $@ $(CDEVS)
-		$(FSUTIL) -a $@ $(BDEVS)
-		$(FSUTIL) -a $@ $(ALLFILES)
-		$(FSUTIL) -a $@ $(MANFILES)
-
-swap.img:
-		dd if=/dev/zero of=$@ bs=1k count=$(SWAP_KBYTES)
-
-user.img:	$(FSUTIL)
-ifneq ($(U_KBYTES), 0)
-		rm -f $@
-		$(FSUTIL) -n$(U_KBYTES) $@
-		(cd u; find . -type d -exec ../$(FSUTIL) -a ../$@ '{}/' \;)
-		(cd u; find . -type f -exec ../$(FSUTIL) -a ../$@ '{}' \+)
-endif
-
-sdcard.rd:	filesys.img swap.img user.img
-ifneq ($(U_KBYTES), 0)
-		tools/mkrd/mkrd -out $@ -boot filesys.img -swap swap.img -fs user.img
-else
-		tools/mkrd/mkrd -out $@ -boot filesys.img -swap swap.img
-endif
+		$(FSUTIL) --repartition=fs=$(FS_MBYTES)M:swap=$(SWAP_MBYTES)M:fs=$(U_MBYTES)M $@
+		$(FSUTIL) --new --partition=1 --manifest=rootfs.manifest $@ .
+		$(FSUTIL) --new --partition=3 --manifest=userfs.manifest $@ u
 
 $(FSUTIL):
 		cd tools/fsutil; $(MAKE)
@@ -175,32 +94,30 @@ clean:
 
 cleanall:       clean
 		$(MAKE) -C lib clean
-		rm -f sys/pic32/*/unix.hex bin/* sbin/* games/[a-k]* games/[m-z]* libexec/* share/man/cat*/*
-		rm -f games/lib/adventure.dat
-		rm -f games/lib/cfscores
-		rm -f share/re.help
-		rm -f share/misc/more.help
+		rm -f sys/pic32/*/unix.hex bin/* sbin/* libexec/*
+		rm -f games/[a-k]* games/[m-z]* share/man/cat*/*
+		rm -f games/lib/adventure.dat games/lib/cfscores
+		rm -f share/re.help share/emg.keys share/misc/more.help
 		rm -f etc/termcap etc/remote etc/phones
-		rm -rf share/unixbench
-		rm -f games/lib/adventure.dat games/lib/cfscores share/re.help share/misc/more.help etc/termcap
 		rm -f tools/configsys/.depend
 		rm -f var/log/aculog
-		rm -rf var/lock
+		rm -rf var/lock share/unixbench
 
-installfs: filesys.img
+installfs:
 ifdef SDCARD
-	sudo dd bs=32k if=sdcard.rd of=$(SDCARD)
+		@[ -f sdcard.img ] || $(MAKE) sdcard.img
+		sudo dd bs=32k if=sdcard.img of=$(SDCARD)
 else
-	@echo "Error: No SDCARD defined."
+		@echo "Error: No SDCARD defined."
 endif
 
 # TODO: make it relative to Target
 installflash:
-	sudo  pic32prog  sys/pic32/fubarino/unix.hex
+		sudo pic32prog sys/pic32/fubarino/unix.hex
 
 # TODO: make it relative to Target
 installboot:
-	sudo  pic32prog  sys/pic32/fubarino/bootloader.hex
+		sudo pic32prog sys/pic32/fubarino/bootloader.hex
 
-.profile:   etc/root/dot.profile
+.profile:       etc/root/dot.profile
 		cp etc/root/dot.profile .profile

README.md

@@ -27,6 +27,14 @@
 
 ## Build
 
+To compile everything from sources, you'll need some packages installed, namely:
+Berkeley YACC, GNU bison and flex, ELF library and FUSE library.
+Under Ubuntu, for example, you can do it by command:
+
+```shell
+$ sudo apt-get install bison byacc flex libelf-dev libfuse-dev
+```
+
 By default, the system is configured for the Max32 board.
 To select another target board, edit a top-level user-specific Makefile called "Makefile.user"
 and set a TARGET value:
@@ -45,8 +53,6 @@ TARGET = $(DUINOMITE)      # for the Duinomite board with USB console
 TARGET = $(DUINOMITEUART)  # for the Duinomite board with UART console
 TARGET = $(DUINOMITEE)     # for the Duinomite E board with USB console
 TARGET = $(DUINOMITEEUART) # for the Duinomite E board with UART console
-TARGET = $(PINGUINO)       # for the Pinguino-Micro board
-TARGET = $(DIP)            # for the DIP board
 TARGET = $(BAREMETAL)      # Bare PIC32 chip on a breakout board
 TARGET = $(FUBARINO)       # Fubarino SD board
 TARGET = $(FUBARINOBIG)    # Fubarino SD board with 8MB SRAM RAMDISK
@@ -65,7 +71,7 @@ To compile the kernel and build a filesystem image, run:
 $ make
 ```
 
-A resulting root filesystem image is in file `sdcard.rd`.
+A resulting root filesystem image is in file `sdcard.img`.
 A kernel is in file `unix.hex` in your target board subdirectory.
 
 
@@ -76,7 +82,7 @@ Win32DiskImager utility (https://launchpad.net/win32-image-writer/+download).
 On Linux, run:
 
 ```shell
-$ sudo dd if=sdcard.rd of=/dev/XYZ
+$ sudo dd if=sdcard.img of=/dev/XYZ
 ```
 
 Here `XYZ` is a device name of SD card, as recognized by Linux (sdb in my case).
@@ -154,13 +160,3 @@ $ ./pic32
 ```
 
 Configuration of simulated board is stored in file `pic32_max32.conf`.
-
-## Build packages
-
-
-For building under Ubuntu you need the following packages installed:
-
-```shell
-$ sudo apt-get install byacc libelf-dev
-```
-

cross.mk

@@ -1,7 +1,7 @@
 DESTDIR		= /usr/local/retrobsd
 MACHINE		= mips
 
-CC		= gcc
+CC		= gcc -m32
 
 AS		= $(CC) -x assembler-with-cpp
 LD		= ld

etc/.gitignore

@@ -1,3 +1,4 @@
 phones
 remote
 termcap
+termcap.full

etc/ttys

@@ -1,16 +1,16 @@
 #
 # name	getty                           type	status		comments
 #
-console	"/libexec/getty std.default"	vt100	on secure	#special
+console	"/libexec/getty std.default"	xterm	on secure	#special
 
 # Enable some of these for additional logins.  Do NOT enable the same one as the
 # console port, or strange things will happen.  You can turn off the console port
 # if you would rather use the getty on the real tty - it's up to you.
 
-tty0	"/libexec/getty std.default"	vt100	off secure
-tty1	"/libexec/getty std.default"	vt100	off secure
-tty2	"/libexec/getty std.default"	vt100	off secure
-tty3	"/libexec/getty std.default"	vt100	off secure
-tty4	"/libexec/getty std.default"	vt100	off secure
-tty5	"/libexec/getty std.default"	vt100	off secure
-ttyUSB0	"/libexec/getty std.default"	vt100	off secure
+tty0	"/libexec/getty std.default"	xterm	off secure
+tty1	"/libexec/getty std.default"	xterm	off secure
+tty2	"/libexec/getty std.default"	xterm	off secure
+tty3	"/libexec/getty std.default"	xterm	off secure
+tty4	"/libexec/getty std.default"	xterm	off secure
+tty5	"/libexec/getty std.default"	xterm	off secure
+ttyUSB0	"/libexec/getty std.default"	xterm	off secure

include/curses.h

@@ -181,6 +181,10 @@ int     waddstr (WINDOW *, char *);
 int     wgetstr (WINDOW *, char *);
 int     wdeleteln (WINDOW *);
 void    mvcur(int ly, int lx, int y, int x);
+void    overwrite(WINDOW *win1, WINDOW *win2);
+void    wclrtobot(WINDOW *win);
+int     mvprintw(int y, int x, char *fmt, ...);
+int     mvwprintw(WINDOW *win, int y, int x, char *fmt, ...);
 
 /*
  * Used to be in unctrl.h.

lib/Makefile

@@ -24,8 +24,9 @@ AOUT_OBJS       = aout.o mips-dis.o
 RANLIB_OBJS     = ranlib.o archive.o
 HEADERS         = a.out.h ar.h nlist.h ranlib.h
 
-vpath %.c $(TOPSRC)/src/cmd/ar $(TOPSRC)/src/cmd/as $(TOPSRC)/src/cmd/ld \
-    $(TOPSRC)/src/cmd/nm $(TOPSRC)/src/cmd/ranlib $(TOPSRC)/src/cmd
+vpath %.c $(TOPSRC)/src/cmd/aout $(TOPSRC)/src/cmd/ar $(TOPSRC)/src/cmd/as \
+    $(TOPSRC)/src/cmd/ld $(TOPSRC)/src/cmd/nm $(TOPSRC)/src/cmd/ranlib \
+    $(TOPSRC)/src/cmd
 
 all install depend: $(HEADERS) $(SUBDIR) $(PROG)
 		-for i in $(SUBDIR); do $(MAKE) -C $$i $(MFLAGS) DESTDIR=$(DESTDIR) $@; done

rootfs.manifest

@@ -0,0 +1,863 @@
+#
+# Manifest file for RetroBSD root filesystem.
+#
+default
+owner 0
+group 0
+dirmode 0775
+filemode 0664
+
+#
+# Directories.
+#
+dir /bin
+dir /dev
+dir /etc
+dir /lib
+dir /libexec
+dir /sbin
+dir /tmp
+dir /u
+
+#
+# Character devices.
+#
+cdev /dev/console
+major 0
+minor 0
+cdev /dev/mem
+major 1
+minor 0
+cdev /dev/kmem
+major 1
+minor 1
+cdev /dev/null
+major 1
+minor 2
+mode 666
+cdev /dev/zero
+major 1
+minor 3
+mode 666
+cdev /dev/tty
+major 2
+minor 0
+mode 666
+cdev /dev/stdin
+major 3
+minor 0
+cdev /dev/stdout
+major 3
+minor 1
+cdev /dev/stderr
+major 3
+minor 2
+cdev /dev/temp0
+major 4
+minor 0
+cdev /dev/temp1
+major 4
+minor 1
+cdev /dev/temp2
+major 4
+minor 2
+
+#
+# Block devices.
+#
+bdev /dev/rd0
+major 0
+minor 0
+bdev /dev/rd0a
+major 0
+minor 1
+bdev /dev/rd0b
+major 0
+minor 2
+bdev /dev/rd0c
+major 0
+minor 3
+bdev /dev/rd0d
+major 0
+minor 4
+bdev /dev/rd1
+major 1
+minor 0
+bdev /dev/rd1a
+major 1
+minor 1
+bdev /dev/rd1b
+major 1
+minor 2
+bdev /dev/rd1c
+major 1
+minor 3
+bdev /dev/rd1d
+major 1
+minor 4
+bdev /dev/rd2
+major 2
+minor 0
+bdev /dev/rd2a
+major 2
+minor 1
+bdev /dev/rd2b
+major 2
+minor 2
+bdev /dev/rd2c
+major 2
+minor 3
+bdev /dev/rd2d
+major 2
+minor 4
+bdev /dev/rd3
+major 3
+minor 0
+bdev /dev/rd3a
+major 3
+minor 1
+bdev /dev/rd3b
+major 3
+minor 2
+bdev /dev/rd3c
+major 3
+minor 3
+bdev /dev/rd3d
+major 3
+minor 4
+bdev /dev/swap
+major 4
+minor 64
+bdev /dev/swap0
+major 4
+minor 0
+bdev /dev/swap1
+major 4
+minor 1
+bdev /dev/swap2
+major 4
+minor 2
+
+#
+# Files: /
+#
+file /.profile
+
+#
+# Files: /etc
+#
+file /etc/fstab
+file /etc/gettytab
+file /etc/group
+file /etc/MAKEDEV
+mode 0775
+file /etc/motd
+file /etc/passwd
+file /etc/phones
+file /etc/rc
+mode 0775
+file /etc/rc.local
+mode 0775
+file /etc/remote
+file /etc/shadow
+file /etc/shells
+file /etc/termcap
+mode 0444
+file /etc/ttys
+
+#
+# Files: /bin
+#
+default
+filemode 0775
+file /bin/adb
+file /bin/adc-demo
+file /bin/aout
+file /bin/apropos
+file /bin/ar
+file /bin/as
+file /bin/awk
+file /bin/basename
+file /bin/basic
+file /bin/bc
+file /bin/cal
+file /bin/cat
+file /bin/cb
+file /bin/cc
+file /bin/chat-server
+file /bin/chflags
+file /bin/chgrp
+file /bin/chmod
+file /bin/chpass
+mode 04755
+file /bin/cmp
+file /bin/col
+file /bin/comm
+file /bin/compress
+file /bin/cp
+file /bin/cpp
+file /bin/crontab
+file /bin/date
+file /bin/dc
+file /bin/dd
+file /bin/df
+mode 02755
+file /bin/diff
+file /bin/du
+file /bin/echo
+file /bin/ed
+file /bin/egrep
+file /bin/emg
+file /bin/env
+file /bin/expr
+file /bin/false
+file /bin/fgrep
+file /bin/file
+file /bin/find
+file /bin/forth
+file /bin/fstat
+mode 02755
+file /bin/glcdtest
+file /bin/globdump
+file /bin/globread
+file /bin/globwrite
+file /bin/grep
+file /bin/groups
+file /bin/head
+file /bin/hostid
+file /bin/hostname
+file /bin/id
+file /bin/iostat
+mode 02755
+file /bin/join
+file /bin/kill
+file /bin/la
+file /bin/last
+file /bin/lcc
+file /bin/lcpp
+file /bin/ld
+file /bin/ln
+file /bin/login
+mode 04755
+file /bin/lol
+file /bin/ls
+file /bin/lv
+file /bin/mail
+mode 04755
+file /bin/make
+file /bin/man
+file /bin/med
+file /bin/mesg
+file /bin/mkdir
+file /bin/more
+file /bin/msec
+file /bin/mv
+file /bin/nice
+file /bin/nm
+file /bin/nohup
+file /bin/ntpdate
+file /bin/od
+file /bin/pagesize
+file /bin/passwd
+mode 04755
+file /bin/picoc
+file /bin/portio
+file /bin/pr
+file /bin/printenv
+file /bin/printf
+file /bin/ps
+mode 02755
+file /bin/pwd
+file /bin/pwm
+file /bin/ranlib
+file /bin/re
+file /bin/renice
+file /bin/renumber
+file /bin/retroforth
+file /bin/rev
+file /bin/rm
+file /bin/rmail
+file /bin/rmdir
+file /bin/rz
+file /bin/scc
+file /bin/scm
+file /bin/sed
+file /bin/setty
+file /bin/sh
+file /bin/size
+file /bin/sl
+file /bin/sleep
+file /bin/smux
+file /bin/sort
+file /bin/split
+file /bin/strip
+file /bin/stty
+file /bin/su
+mode 04755
+file /bin/sum
+file /bin/sync
+file /bin/sysctl
+file /bin/sz
+file /bin/tail
+file /bin/tar
+file /bin/tee
+file /bin/telnet
+file /bin/test
+file /bin/time
+file /bin/tip
+file /bin/touch
+file /bin/tr
+file /bin/true
+file /bin/tsort
+file /bin/tty
+file /bin/uname
+file /bin/uncompress
+file /bin/uniq
+file /bin/uucico
+file /bin/uuclean
+file /bin/uucp
+file /bin/uudecode
+file /bin/uuencode
+file /bin/uulog
+file /bin/uuname
+file /bin/uupoll
+file /bin/uuq
+file /bin/uusend
+file /bin/uusnap
+file /bin/uux
+file /bin/uuxqt
+file /bin/vi
+file /bin/vmstat
+mode 02755
+file /bin/w
+file /bin/wall
+mode 02755
+file /bin/wc
+file /bin/web-client
+file /bin/web-server
+file /bin/whereis
+file /bin/who
+file /bin/whoami
+file /bin/write
+mode 02755
+file /bin/xargs
+file /bin/zcat
+
+link /bin/[
+target /bin/test
+
+link /bin/whatis
+target /bin/apropos
+
+link /bin/chfn
+target /bin/chpass
+link /bin/chsh
+target /bin/chpass
+
+link /bin/rb
+target /bin/rz
+link /bin/rx
+target /bin/rz
+
+link /bin/sb
+target /bin/sz
+link /bin/sx
+target /bin/sz
+
+#
+# Files: /sbin
+#
+file /sbin/chown
+file /sbin/chroot
+mode 04755
+file /sbin/cron
+file /sbin/devupdate
+file /sbin/disktool
+file /sbin/fdisk
+file /sbin/fsck
+file /sbin/init
+mode 0700
+file /sbin/mkfs
+file /sbin/mknod
+file /sbin/mkpasswd
+file /sbin/mount
+file /sbin/pstat
+mode 02755
+file /sbin/rdprof
+file /sbin/reboot
+file /sbin/shutdown
+mode 04750
+file /sbin/talloc
+file /sbin/umount
+file /sbin/update
+file /sbin/updatedb
+file /sbin/vipw
+
+link /sbin/bootloader
+target /sbin/reboot
+link /sbin/fastboot
+target /sbin/reboot
+link /sbin/halt
+target /sbin/reboot
+link /sbin/poweroff
+target /sbin/reboot
+
+#
+# Files: /games
+#
+default
+filemode 0775
+dir /games
+file /games/adventure
+file /games/arithmetic
+file /games/atc
+file /games/backgammon
+file /games/banner
+file /games/battlestar
+file /games/bcd
+file /games/boggle
+file /games/btlgammon
+file /games/canfield
+file /games/cfscores
+file /games/cribbage
+file /games/factor
+file /games/fish
+file /games/fortune
+file /games/hangman
+file /games/mille
+file /games/monop
+file /games/morse
+file /games/number
+file /games/ppt
+file /games/primes
+file /games/quiz
+file /games/rain
+file /games/robots
+file /games/rogue
+file /games/sail
+file /games/snake
+file /games/snscore
+file /games/teachgammon
+file /games/trek
+file /games/worm
+file /games/worms
+file /games/wump
+
+#
+# Files: /games/lib
+#
+default
+filemode 0444
+dir /games/lib
+file /games/lib/adventure.dat
+file /games/lib/battle_strings
+file /games/lib/backrules
+file /games/lib/bogdict
+file /games/lib/cfscores
+file /games/lib/crib.instr
+mode 0666
+file /games/lib/fortunes.dat
+file /games/lib/cards.pck
+file /games/lib/robots_roll
+mode 0666
+file /games/lib/snakerawscores
+mode 0666
+dir /games/lib/atc
+file /games/lib/atc/ATC_scores
+file /games/lib/atc/crossover
+file /games/lib/atc/default
+file /games/lib/atc/easy
+file /games/lib/atc/game_2
+file /games/lib/atc/Game_List
+file /games/lib/atc/Killer
+dir /games/lib/quiz.k
+file /games/lib/quiz.k/africa
+file /games/lib/quiz.k/america
+file /games/lib/quiz.k/areas
+file /games/lib/quiz.k/arith
+file /games/lib/quiz.k/asia
+file /games/lib/quiz.k/babies
+file /games/lib/quiz.k/bard
+file /games/lib/quiz.k/chinese
+file /games/lib/quiz.k/collectives
+file /games/lib/quiz.k/ed
+file /games/lib/quiz.k/elements
+file /games/lib/quiz.k/europe
+file /games/lib/quiz.k/greek
+file /games/lib/quiz.k/inca
+file /games/lib/quiz.k/index
+file /games/lib/quiz.k/latin
+file /games/lib/quiz.k/locomotive
+file /games/lib/quiz.k/midearth
+file /games/lib/quiz.k/morse
+file /games/lib/quiz.k/murders
+file /games/lib/quiz.k/poetry
+file /games/lib/quiz.k/posneg
+file /games/lib/quiz.k/pres
+file /games/lib/quiz.k/province
+file /games/lib/quiz.k/seq-easy
+file /games/lib/quiz.k/seq-hard
+file /games/lib/quiz.k/sexes
+file /games/lib/quiz.k/sov
+file /games/lib/quiz.k/spell
+file /games/lib/quiz.k/state
+file /games/lib/quiz.k/trek
+file /games/lib/quiz.k/ucc
+
+#
+# Files: /include
+#
+default
+filemode 0664
+dir /include
+dir /include/arpa
+dir /include/machine
+dir /include/smallc
+dir /include/smallc/sys
+dir /include/sys
+file /include/alloca.h
+file /include/a.out.h
+file /include/ar.h
+file /include/arpa/inet.h
+file /include/assert.h
+file /include/ctype.h
+file /include/curses.h
+file /include/dbm.h
+file /include/fcntl.h
+file /include/float.h
+file /include/fstab.h
+file /include/grp.h
+file /include/kmem.h
+file /include/lastlog.h
+file /include/limits.h
+file /include/machine/cpu.h
+file /include/machine/elf_machdep.h
+file /include/machine/float.h
+file /include/machine/io.h
+file /include/machine/limits.h
+file /include/machine/machparam.h
+file /include/machine/pic32mx.h
+file /include/machine/rd_sdramp_config.h
+file /include/machine/sdram.h
+file /include/machine/ssd1926.h
+file /include/machine/usb_ch9.h
+file /include/machine/usb_device.h
+file /include/machine/usb_function_cdc.h
+file /include/machine/usb_function_hid.h
+file /include/machine/usb_hal_pic32.h
+file /include/math.h
+file /include/mtab.h
+file /include/ndbm.h
+file /include/nlist.h
+file /include/paths.h
+file /include/pcc.h
+file /include/psout.h
+file /include/pwd.h
+file /include/ranlib.h
+file /include/regexp.h
+file /include/setjmp.h
+file /include/sgtty.h
+file /include/smallc/curses.h
+file /include/smallc/fcntl.h
+file /include/smallc/signal.h
+file /include/smallc/stdio.h
+file /include/smallc/sys/gpio.h
+file /include/smallc/sys/spi.h
+file /include/smallc/wiznet.h
+file /include/stab.h
+file /include/stdarg.h
+file /include/stddef.h
+file /include/stdint.h
+file /include/stdio.h
+file /include/stdlib.h
+file /include/string.h
+file /include/strings.h
+file /include/struct.h
+file /include/sys/adc.h
+file /include/sys/buf.h
+file /include/syscall.h
+file /include/sys/callout.h
+file /include/sys/clist.h
+file /include/sys/conf.h
+file /include/sys/debug.h
+file /include/sys/dir.h
+file /include/sys/disk.h
+file /include/sys/dkbad.h
+file /include/sys/dk.h
+file /include/sys/errno.h
+file /include/sys/exec_aout.h
+file /include/sys/exec_elf.h
+file /include/sys/exec.h
+file /include/sysexits.h
+file /include/sys/fcntl.h
+file /include/sys/file.h
+file /include/sys/fs.h
+file /include/sys/glcd.h
+file /include/sys/glob.h
+file /include/sys/gpio.h
+file /include/sys/inode.h
+file /include/sys/ioctl.h
+file /include/sys/kernel.h
+file /include/sys/map.h
+file /include/sys/mount.h
+file /include/sys/msgbuf.h
+file /include/sys/mtio.h
+file /include/sys/namei.h
+file /include/sys/oc.h
+file /include/sys/param.h
+file /include/sys/picga.h
+file /include/sys/proc.h
+file /include/sys/ptrace.h
+file /include/sys/pty.h
+file /include/sys/rd_flash.h
+file /include/sys/rdisk.h
+file /include/sys/rd_mrams.h
+file /include/sys/rd_sdramp.h
+file /include/sys/rd_sramc.h
+file /include/sys/reboot.h
+file /include/sys/resource.h
+file /include/sys/select.h
+file /include/sys/signal.h
+file /include/sys/signalvar.h
+file /include/sys/spi_bus.h
+file /include/sys/spi.h
+file /include/sys/stat.h
+file /include/sys/swap.h
+file /include/sys/sysctl.h
+file /include/sys/syslog.h
+file /include/sys/systm.h
+file /include/sys/time.h
+file /include/sys/times.h
+file /include/sys/trace.h
+file /include/sys/ttychars.h
+file /include/sys/ttydev.h
+file /include/sys/tty.h
+file /include/sys/types.h
+file /include/sys/uart.h
+file /include/sys/uio.h
+file /include/sys/usb_uart.h
+file /include/sys/user.h
+file /include/sys/utsname.h
+file /include/sys/vm.h
+file /include/sys/vmmac.h
+file /include/sys/vmmeter.h
+file /include/sys/vmparam.h
+file /include/sys/vmsystm.h
+file /include/sys/wait.h
+file /include/term.h
+file /include/termios-todo.h
+file /include/time.h
+file /include/ttyent.h
+file /include/tzfile.h
+file /include/unistd.h
+file /include/utmp.h
+file /include/vmf.h
+
+symlink /include/errno.h
+target sys/errno.h
+
+symlink /include/signal.h
+target sys/signal.h
+
+symlink /include/syslog.h
+target sys/syslog.h
+
+#
+# Files: /lib
+#
+file /lib/crt0.o
+file /lib/libc.a
+file /lib/libcurses.a
+file /lib/libtermlib.a
+file /lib/libwiznet.a
+file /lib/retroImage
+
+#
+# Files: /libexec
+#
+default
+filemode 0775
+file /libexec/bigram
+file /libexec/code
+file /libexec/diffh
+file /libexec/getty
+file /libexec/smallc
+file /libexec/smlrc
+
+#
+# Files: /share
+#
+default
+filemode 0444
+dir /share
+dir /share/dict
+dir /share/misc
+file /share/emg.keys
+file /share/re.help
+file /share/dict/words
+file /share/misc/more.help
+
+#
+# Files: /share/example
+#
+default
+filemode 0664
+dir /share/example
+file /share/example/ashello.S
+file /share/example/blkjack.bas
+file /share/example/chello.c
+file /share/example/echo.S
+file /share/example/fact.fth
+file /share/example/hilow.bas
+file /share/example/Makefile
+file /share/example/prime.scm
+file /share/example/skeleton.c
+file /share/example/stars.bas
+file /share/example/stdarg.c
+
+#
+# Files: /share/smallc
+#
+dir /share/smallc
+file /share/smallc/adc.c
+file /share/smallc/gpio.c
+file /share/smallc/hello.c
+file /share/smallc/Makefile
+file /share/smallc/primelist.c
+file /share/smallc/primesum.c
+file /share/smallc/q8.c
+file /share/smallc/rain.c
+file /share/smallc/test1.c
+file /share/smallc/test2.c
+file /share/smallc/test3.c
+file /share/smallc/webserver.c
+
+#
+# Files: /share/smallerc
+#
+dir /share/smallerc
+file /share/smallerc/adc.c
+file /share/smallerc/gpio.c
+file /share/smallerc/hello.c
+file /share/smallerc/Makefile
+file /share/smallerc/primelist.c
+file /share/smallerc/primesum.c
+file /share/smallerc/q8.c
+file /share/smallerc/rain.c
+file /share/smallerc/test1.c
+file /share/smallerc/test2.c
+file /share/smallerc/test3.c
+
+#
+# Files: /var
+#
+dir /var
+dir /var/lock
+dir /var/log
+dir /var/run
+file /var/log/messages
+file /var/log/wtmp
+
+#
+# Files: /share/man
+#
+dir /share/man
+dir /share/man/cat1
+dir /share/man/cat2
+dir /share/man/cat3
+dir /share/man/cat4
+dir /share/man/cat5
+dir /share/man/cat6
+dir /share/man/cat7
+dir /share/man/cat8
+file /share/man/cat1/ar.0
+file /share/man/cat1/chflags.0
+file /share/man/cat1/chpass.0
+file /share/man/cat1/cpp.0
+file /share/man/cat1/crontab.0
+file /share/man/cat1/emg.0
+file /share/man/cat1/groups.0
+file /share/man/cat1/hostname.0
+file /share/man/cat1/id.0
+file /share/man/cat1/la.0
+file /share/man/cat1/lcc.0
+file /share/man/cat1/ld.0
+file /share/man/cat1/lv.0
+file /share/man/cat1/passwd.0
+file /share/man/cat1/printf.0
+file /share/man/cat1/ranlib.0
+file /share/man/cat1/rz.0
+file /share/man/cat1/stty.0
+file /share/man/cat1/sz.0
+file /share/man/cat1/test.0
+file /share/man/cat1/uname.0
+file /share/man/cat1/whoami.0
+file /share/man/cat1/xargs.0
+file /share/man/cat3/vmf.0
+file /share/man/cat5/ar.0
+file /share/man/cat5/crontab.0
+file /share/man/cat5/ranlib.0
+file /share/man/cat6/adventure.0
+file /share/man/cat6/arithmetic.0
+file /share/man/cat6/atc.0
+file /share/man/cat6/backgammon.0
+file /share/man/cat6/banner.0
+file /share/man/cat6/battlestar.0
+file /share/man/cat6/bcd.0
+file /share/man/cat6/canfield.0
+file /share/man/cat6/cribbage.0
+file /share/man/cat6/fish.0
+file /share/man/cat6/fortune.0
+file /share/man/cat6/hangman.0
+file /share/man/cat6/mille.0
+file /share/man/cat6/monop.0
+file /share/man/cat6/number.0
+file /share/man/cat6/quiz.0
+file /share/man/cat6/rain.0
+file /share/man/cat6/robots.0
+file /share/man/cat6/rogue.0
+file /share/man/cat6/sail.0
+file /share/man/cat6/snake.0
+file /share/man/cat6/trek.0
+file /share/man/cat6/worm.0
+file /share/man/cat6/worms.0
+file /share/man/cat6/wump.0
+file /share/man/cat8/chown.0
+file /share/man/cat8/chroot.0
+file /share/man/cat8/cron.0
+file /share/man/cat8/fdisk.0
+file /share/man/cat8/fstat.0
+file /share/man/cat8/init.0
+file /share/man/cat8/mkfs.0
+file /share/man/cat8/mknod.0
+file /share/man/cat8/mkpasswd.0
+file /share/man/cat8/mount.0
+file /share/man/cat8/pstat.0
+file /share/man/cat8/reboot.0
+file /share/man/cat8/renice.0
+file /share/man/cat8/shutdown.0
+file /share/man/cat8/sysctl.0
+#file /share/man/cat8/talloc.0
+file /share/man/cat8/umount.0
+file /share/man/cat8/update.0
+file /share/man/cat8/vipw.0
+
+link /share/man/cat1/rb.0
+target /share/man/cat1/rz.0
+link /share/man/cat1/rx.0
+target /share/man/cat1/rz.0
+
+link /share/man/cat1/sb.0
+target /share/man/cat1/sz.0
+link /share/man/cat1/sx.0
+target /share/man/cat1/sz.0
+
+link /share/man/cat8/fastboot.0
+target /share/man/cat8/reboot.0
+link /share/man/cat8/halt.0
+target /share/man/cat8/reboot.0
+
+link /share/man/cat1/chfn.0
+target /share/man/cat1/chpass.0
+link /share/man/cat1/chsh.0
+target /share/man/cat1/chpass.0

share/.gitignore

@@ -1,3 +1,4 @@
 re.help
 misc
 unixbench
+emg.keys

share/example/Makefile

@@ -1,5 +1,5 @@
 
-all:	ashello echo chello
+all:	ashello echo chello stdarg skeleton
 
 ashello: ashello.o
 	$(LD) ashello.o -o $@
@@ -10,5 +10,11 @@ chello: chello.o
 echo:   echo.o
 	$(LD) $@.o -o $@
 
+stdarg: stdarg.o
+	$(CC) stdarg.o -o $@
+
+skeleton: skeleton.o
+	$(CC) skeleton.o -o $@
+
 clean:
-	rm -f *.o ashello echo chello *.dis *~
+	rm -f *.o ashello echo chello stdarg skeleton *.dis *~

share/man/.gitignore

@@ -0,0 +1,3 @@
+makewhatis.sed
+man.template
+whatis

share/smallc/hello.c

@@ -1,6 +1,4 @@
-extern int printf();
-
-int main()
+main()
 {
     printf ("Hello, SmallC World!\n");
 }

share/smallerc/Makefile

@@ -0,0 +1,38 @@
+CC      = cc
+PROG    = hello primelist primesum test1 test2 test3 gpio adc rain \
+          q8
+
+all:    $(PROG)
+
+hello:	hello.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) hello.c
+
+primelist: primelist.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) primelist.c
+
+primesum: primesum.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) primesum.c
+
+gpio:   gpio.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) gpio.c
+
+adc:    adc.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) adc.c
+
+rain:   rain.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) rain.c
+
+q8:     q8.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) q8.c
+
+test1:	test1.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) test1.c
+
+test2:	test2.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) test2.c
+
+test3:	test3.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) test3.c
+
+clean:
+	rm -f *.o $(PROG)

share/smallerc/adc.c

@@ -0,0 +1,29 @@
+/*
+ * Example of reading ADC data.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+char buf[100];
+
+int main(void)
+{
+    int i, fd, value;
+
+    for (i=0; i<16; i++) {
+        sprintf(buf, "/dev/adc%d", i);
+        fd = open(buf, O_RDWR);
+        if (fd < 0) {
+            printf("Error: unable to open %s\n", buf);
+        } else {
+            if (read(fd, buf, 20) > 0) {
+                value = strtol (buf, 0, 0);
+                printf("adc%-2d = %d\n", i, value);
+            }
+            close(fd);
+        }
+    }
+    return 0;
+}

share/smallerc/gpio.c

@@ -0,0 +1,26 @@
+/*
+ * Example of polling general purpose i/o pins.
+ */
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/gpio.h>
+
+int main(void)
+{
+    int fd, pnum, value;
+
+    fd = open ("/dev/porta", O_RDWR);
+    if (fd < 0) {
+        perror ("/dev/porta");
+        return -1;
+    }
+
+    for (pnum=0; pnum<7; pnum++) {
+        value = ioctl (fd, GPIO_POLL | GPIO_PORT (pnum), 0);
+        if (value < 0)
+            perror ("GPIO_POLL");
+        printf ("port%c = 0x%04x\n", pnum + 'A', value);
+    }
+    return 0;
+}

share/smallerc/hello.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(void)
+{
+    printf("Hello, Smaller C World!\n");
+}

share/smallerc/primelist.c

@@ -0,0 +1,35 @@
+/*
+ * Print the list of prime numbers up to 100.
+ */
+#include <stdio.h>
+
+int isprime(int);
+
+int main(void)
+{
+    int n;
+
+    for (n=2; n<100; ++n) {
+        if (isprime(n)) {
+            printf("%d ", n);
+        }
+    }
+    printf("\n");
+}
+
+int isprime(int n)
+{
+    int j;
+
+    if (n == 2)
+        return 1;
+
+    if (n % 2 == 0)
+        return 0;
+
+    for (j=3; j*j<=n; j+=2)
+        if (n % j == 0)
+            return 0;
+    return 1;
+}
+

share/smallerc/primesum.c

@@ -0,0 +1,35 @@
+/*
+ * Compute the sum of prime numbers up to 10000.
+ */
+#include <stdio.h>
+
+int isprime(int);
+
+int main(void)
+{
+    int sum, n;
+
+    sum = 0;
+    for (n=2; n<10000; ++n) {
+        if (isprime(n)) {
+            sum += n;
+        }
+    }
+    printf("Sum of primes less than 10000: %d\n", sum);
+}
+
+int isprime(int n)
+{
+    int j;
+
+    if (n == 2)
+        return 1;
+
+    if (n % 2 == 0)
+        return 0;
+
+    for (j=3; j*j<=n; j+=2)
+        if (n % j == 0)
+            return 0;
+    return 1;
+}

share/smallerc/q8.c

@@ -0,0 +1,209 @@
+/*
+ * Eight Queens puzzle
+ *
+ * (C) 2010 by Mark Sproul
+ * Open source as per standard Arduino code
+ * Modified by Pito 12/2012 for SmallC and then by Alexey Frunze for Smaller C
+ */
+#include <stdio.h>
+#define TRUE    1
+#define FALSE   0
+
+unsigned int gChessBoard[8];
+unsigned int gLoopCounter;
+int gValidCount;
+
+int CheckCurrentBoard(void)
+{
+    int ii;
+    int jj;
+    int theRow;
+    int theLongRow;
+    int theLongColumns;
+    int bitCount;
+
+    //* we know we have 1 in each row,
+    //* Check for 1 in each column
+    theRow = 0;
+    for (ii=0; ii<8; ii++) {
+        theRow |= gChessBoard[ii];
+    }
+    if (theRow != 0x0ff) {
+        return FALSE;
+    }
+
+    //* we have 1 in each column, now check the diagonals
+    theLongColumns = 0;
+    for (ii=0; ii<8; ii++) {
+        theLongRow = gChessBoard[ii] & 0x0ff;
+        theLongRow = theLongRow << ii;
+
+        theLongColumns |= theLongRow;
+    }
+
+    //* now count the bits
+    bitCount = 0;
+    for (ii=0; ii<16; ii++) {
+        if ((theLongColumns & 0x01) == 0x01) {
+            bitCount++;
+        }
+        theLongColumns = theLongColumns >> 1;
+    }
+
+    if (bitCount != 8) {
+        return FALSE;
+    }
+
+    //* we now have to check the other diagonal
+    theLongColumns = 0;
+    for (ii=0; ii<8; ii++) {
+        theLongRow = gChessBoard[ii] & 0x0ff;
+        theLongRow = theLongRow << 8;
+        theLongRow = theLongRow >> ii;
+
+        theLongColumns |= theLongRow;
+    }
+
+    //* now count the bits
+    bitCount = 0;
+    for (ii=0; ii<16; ii++) {
+        if ((theLongColumns & 0x01) == 0x01) {
+            bitCount++;
+        }
+        theLongColumns = theLongColumns >> 1;
+    }
+
+    if (bitCount != 8) {
+        return FALSE;
+    }
+    return TRUE;
+}
+
+int CheckForDone(void)
+{
+    int ii;
+    int weAreDone;
+    int theRow;
+
+    weAreDone = FALSE;
+
+    //* we know we have 1 in each row,
+    //* Check for 1 in each column
+    theRow = 0;
+    for (ii=0; ii<8; ii++) {
+        theRow |= gChessBoard[ii];
+    }
+
+    if (theRow == 0x01) {
+        weAreDone = TRUE;
+    }
+    return weAreDone;
+}
+
+void RotateQueens(void)
+{
+    int ii;
+    int keepGoing;
+    int theRow;
+
+    ii = 0;
+    keepGoing = TRUE;
+    while (keepGoing && (ii < 8)) {
+        theRow = gChessBoard[ii] & 0x0ff;
+        theRow = (theRow >> 1) & 0x0ff;
+        if (theRow != 0) {
+            gChessBoard[ii] = theRow;
+            keepGoing = FALSE;
+        } else {
+            gChessBoard[ii] = 0x080;
+        }
+        ii++;
+    }
+}
+
+void PrintChessBoard(void)
+{
+    int ii;
+    int jj;
+    int theRow;
+    char textString[32];
+
+    printf("\nLoop= %d\n", gLoopCounter);
+    printf("Solution count= %d\n", gValidCount);
+
+    printf("+----------------+\n");
+    for (ii=0; ii<8; ii++) {
+        theRow = gChessBoard[ii];
+
+        printf("|");
+        for (jj=0; jj<8; jj++) {
+            if (theRow & 0x080) {
+                printf("Q ");
+            } else {
+                printf(". ");
+            }
+            theRow = theRow << 1;
+        }
+        printf("|\n");
+    }
+    printf("+----------------+\n");
+}
+
+int main(void)
+{
+    int ii;
+
+    printf("\nEight Queens brute force");
+    printf("\n************************\n");
+    //* put the 8 queens on the board, 1 in each row
+    for (ii=0; ii<8; ii++) {
+        gChessBoard[ii] = 0x080;
+    }
+    PrintChessBoard();
+
+    gLoopCounter = 0;
+    gValidCount = 0;
+
+
+    while (1) {
+        gLoopCounter++;
+
+        if (CheckCurrentBoard()) {
+            gValidCount++;
+            PrintChessBoard();
+        } else if ((gLoopCounter % 1000) == 0) {
+            //PrintChessBoard();
+        }
+
+        RotateQueens();
+        if (CheckForDone()) {
+            //int elapsedSeconds;
+            //int elapsedMinutes;
+            //int elapsedHours;
+
+            //elapsedSeconds = millis() / 1000;
+            //elapsedMinutes = elapsedSeconds / 60;
+            //elapsedHours = elapsedMinutes / 60;
+
+            printf("----------------------------------\n");
+            printf("All done\n");
+
+            PrintChessBoard();
+            printf("----------------------------------\n");
+
+            //Serial.print("total seconds=");
+            //Serial.println(elapsedSeconds);
+
+            //Serial.print("hours=");
+            //Serial.println(elapsedHours);
+
+            //Serial.print("minutes=");
+            //Serial.println(elapsedMinutes % 60);
+
+            //Serial.print("seconds=");
+            //Serial.println(elapsedSeconds % 60);
+
+            return (1);
+        }
+    }
+}

share/smallerc/rain.c

@@ -0,0 +1,129 @@
+/*
+ * Example of using termcap library for SmallC.
+ * 11/3/1980 EPS/CITHEP
+ *
+ * Copyright (c) 1980 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+
+#define CO 80               /* number of columns */
+#define LI 24               /* number of lines */
+
+#define CL "\33[H\33[J"     /* clear the screen */
+#define CM "\33[%u;%uH"     /* move the cursor to row, column */
+#define BC "\b"             /* move cursor left */
+#define DN "\33[B"          /* move cursor down */
+#define ND " "              /* move cursor right */
+
+int xpos[5], ypos[5];
+char outbuf[BUFSIZ];
+
+void moveto(int col, int row)
+{
+    printf(CM, row, col);
+}
+
+void onsig(int n)
+{
+    moveto(0, LI - 1);
+    fflush(stdout);
+    _exit(0);
+}
+
+int main(void)
+{
+    int x, y, j;
+
+    setbuf(stdout, outbuf);
+    for (j = SIGHUP; j <= SIGTERM; j++)
+        if (signal(j, SIG_IGN) != SIG_IGN)
+            signal(j, onsig);
+
+    fputs(CL, stdout);
+    fflush(stdout);
+    for (j = 5; --j >= 0; ) {
+        xpos[j] = 2 + rand() % (CO - 4);
+        ypos[j] = 2 + rand() % (LI - 4);
+    }
+    for (j = 0; ; ) {
+        x = 2 + rand() % (CO - 4);
+        y = 2 + rand() % (LI - 4);
+        moveto(x, y);
+        putchar('.');
+        moveto(xpos[j], ypos[j]);
+        putchar('o');
+        if (j == 0)
+            j = 4;
+        else
+            --j;
+        moveto(xpos[j], ypos[j]);
+        putchar('O');
+        if (j == 0)
+            j = 4;
+        else
+            --j;
+        moveto(xpos[j], ypos[j]-1);
+        putchar('-');
+        fputs(DN, stdout);
+        fputs(BC, stdout);
+        fputs(BC, stdout);
+        fputs("|.|", stdout);
+        fputs(DN, stdout);
+        fputs(BC, stdout);
+        fputs(BC, stdout);
+        putchar('-');
+        if (j == 0)
+            j = 4;
+        else
+            --j;
+        moveto(xpos[j], ypos[j]-2);
+        putchar('-');
+        fputs(DN, stdout);
+        fputs(BC, stdout);
+        fputs(BC, stdout);
+        fputs("/ \\", stdout);
+        moveto(xpos[j]-2, ypos[j]);
+        fputs("| O |", stdout);
+        moveto(xpos[j]-1, ypos[j]+1);
+        fputs("\\ /", stdout);
+        fputs(DN, stdout);
+        fputs(BC, stdout);
+        fputs(BC, stdout);
+        putchar('-');
+        if (j == 0)
+            j = 4;
+        else
+            --j;
+        moveto(xpos[j], ypos[j]-2);
+        putchar(' ');
+        fputs(DN, stdout);
+        fputs(BC, stdout);
+        fputs(BC, stdout);
+        putchar(' ');
+        fputs(ND, stdout);
+        putchar(' ');
+        moveto(xpos[j]-2, ypos[j]);
+        putchar(' ');
+        fputs(ND, stdout);
+        putchar(' ');
+        fputs(ND, stdout);
+        putchar(' ');
+        moveto(xpos[j]-1, ypos[j]+1);
+        putchar(' ');
+        fputs(ND, stdout);
+        putchar(' ');
+        fputs(DN, stdout);
+        fputs(BC, stdout);
+        fputs(BC, stdout);
+        putchar(' ');
+        xpos[j] = x;
+        ypos[j] = y;
+        fflush(stdout);
+        usleep(100000);
+    }
+}

share/smallerc/test1.c

@@ -0,0 +1,214 @@
+#include <stdio.h>
+
+int ga[5];
+
+int main(void)
+{
+    int a, b, c, d;
+    int arr[5];
+    int *pi;
+    char arrc[5];
+    char *pic;
+    int s1, s2;
+    int z;
+    int t;
+    int *pip;
+    int *picp;
+    int e1, e2;
+
+    ga[0] = 10;
+    ga[1] = 20;
+    ga[2] = 30;
+    ga[3] = 40;
+    ga[4] = 50;
+    
+    a = 21;
+    b = 31;
+    c = 71;
+    d = 82;
+
+    arr[0] = 10;
+    arr[1] = 20;
+    arr[2] = 30;
+    arr[3] = 40;
+    arr[4] = 50;
+    pi = &arr[0];
+
+    arrc[0] = 13;
+    arrc[1] = 23;
+    arrc[2] = 33;
+    arrc[3] = 43;
+    arrc[4] = 53;
+    pic = &arrc[0];
+
+    printf("          21 + 31 = %d (52)\n",   a + b);
+    printf("          21 - 31 = %d (-10)\n",  a - b);
+    printf("          21 & 71 = %d (5)\n",    a & c);
+    printf("          21 | 82 = %d (87)\n",   a | d);
+    printf("          21 ^ 82 = %d (71)\n",   a ^ d);
+    printf("          21 * 82 = %d (1722)\n", a * d);
+    printf("          82 %% 21 = %d (19)\n",  d % a);
+    printf("          82 / 21 = %d (3)\n",    d / a);
+    printf("              *pi = %d (10)\n",   *pi);
+    printf("          *pi + 1 = %d (11)\n",   *pi + 1);
+    printf("        *(pi + 1) = %d (20)\n",   *(pi + 1));
+    printf("&arr[3] - &arr[0] = %d (3)\n",    &arr[3] - &arr[0]);
+    printf("    arr[3]-arr[0] = %d (30)\n",   arr[3] - arr[0]);
+    printf("    arr[3]+arr[0] = %d (50)\n",   arr[3] + arr[0]);
+    printf("  &ga[3] - &ga[0] = %d (3)\n",    &ga[3] - &ga[0]);
+    printf("      ga[3]-ga[0] = %d (30)\n",   ga[3] - ga[0]);
+    printf("      ga[3]+ga[0] = %d (50)\n",   ga[3] + ga[0]);
+    printf("\n");
+
+    printf("               *pic = %d (13)\n", *pic);
+    printf("           *pic + 1 = %d (14)\n", *pic+1);
+    printf("         *(pic + 1) = %d (23)\n", *(pic+1));
+    printf("&arrc[3] - &arrc[0] = %d (3)\n",  &arrc[3]-&arrc[0]);
+    printf("\n");
+
+    s1 = 3;
+    s2 = -200;
+    printf("  82 << 3 = %d (656)\n",   d << s1);
+    printf("  82 >> 3 = %d (10)\n",    d >> s1);
+    printf("-200 >> 3 = %d (-25)\n",   s2 >> s1);
+    printf("-200 << 3 = %d (-1600)\n", s2 << s1);
+    printf("\n");
+
+    printf("-s1 = %d (-3)\n",  -s1);
+    printf("-s2 = %d (200)\n", -s2);
+    printf("\n");
+
+    printf("~82 = %d (-83)\n", ~d);
+    printf("\n");
+
+    z = 0;
+    printf("!82 = %d (0)\n", !d);
+    printf(" !0 = %d (1)\n", !z);
+    printf("\n");
+
+    printf(" 0 && 0  = %d (0)\n", z && z);
+    printf(" 0 && 21 = %d (0)\n", z && a);
+    printf(" 3 && 21 = %d (1)\n", s1 && a);
+    printf("21 && 3  = %d (1)\n", a && s1);
+    printf("\n");
+
+    printf(" 0 || 0  = %d (0)\n", z || z);
+    printf(" 0 || 21 = %d (1)\n", z || a);
+    printf(" 3 || 21 = %d (1)\n", s1 || a);
+    printf("21 || 3  = %d (1)\n", a || s1);
+    printf("\n");
+
+    pi = 4;
+    printf("pi++ = %d (4)\n",  pi++);
+    printf("  pi = %d (8)\n",  pi);
+    printf("++pi = %d (12)\n", ++pi);
+    printf("pi-- = %d (12)\n", pi--);
+    printf("  pi = %d (8)\n",  pi);
+    printf("--pi = %d (4)\n",  --pi);
+    printf("\n");
+
+    pic = 4;
+    printf("pic++ = %d (4)\n", pic++);
+    printf("  pic = %d (5)\n", pic);
+    printf("++pic = %d (6)\n", ++pic);
+    printf("pic-- = %d (6)\n", pic--);
+    printf("  pic = %d (5)\n", pic);
+    printf("--pic = %d (4)\n", --pic);
+    printf("\n");
+
+    t = 4;
+    printf("t++ = %d (4)\n", t++);
+    printf("  t = %d (5)\n", t);
+    printf("++t = %d (6)\n", ++t);
+    printf("t-- = %d (6)\n", t--);
+    printf("  t = %d (5)\n", t);
+    printf("--t = %d (4)\n", --t);
+    printf("\n");
+
+    t = 4;
+    printf(" t==4 = %d (1)\n", t == 4);
+    printf(" t==3 = %d (0)\n", t == 3);
+    printf(" t==5 = %d (0)\n", t == 5);
+    t = -4;
+    printf("t==-4 = %d (1)\n", t == -4);
+    printf("t==-3 = %d (0)\n", t == -3);
+    printf("t==-5 = %d (0)\n", t == -5);
+    printf(" t==4 = %d (0)\n", t == 4);
+    printf(" t==3 = %d (0)\n", t == 3);
+    printf(" t==5 = %d (0)\n", t == 5);
+    printf("\n");
+
+    t = 4;
+    printf(" t!=4 = %d (0)\n", t != 4);
+    printf(" t!=3 = %d (1)\n", t != 3);
+    printf(" t!=5 = %d (1)\n", t != 5);
+    t = -4;
+    printf("t!=-4 = %d (0)\n", t != -4);
+    printf("t!=-3 = %d (1)\n", t != -3);
+    printf("t!=-5 = %d (1)\n", t != -5);
+    printf(" t!=4 = %d (1)\n", t != 4);
+    printf(" t!=3 = %d (1)\n", t != 3);
+    printf(" t!=5 = %d (1)\n", t != 5);
+    printf("\n");
+
+    t = 4;
+    printf(" t<4 = %d (0)\n", t < 4);
+    printf(" t<3 = %d (0)\n", t < 3);
+    printf(" t<5 = %d (1)\n", t < 5);
+    printf("t<-1 = %d (0)\n", t < -1);
+    printf("\n");
+
+    printf(" t<=4 = %d (1)\n", t <= 4);
+    printf(" t<=3 = %d (0)\n", t <= 3);
+    printf(" t<=5 = %d (1)\n", t <= 5);
+    printf("t<=-1 = %d (0)\n", t <= -1);
+    printf("\n");
+
+    t = 4;
+    printf(" t>4 = %d (0)\n", t > 4);
+    printf(" t>3 = %d (1)\n", t > 3);
+    printf(" t>5 = %d (0)\n", t > 5);
+    printf("t>-1 = %d (1)\n", t > -1);
+    printf("\n");
+
+    printf(" t>=4 = %d (1)\n", t >= 4);
+    printf(" t>=3 = %d (1)\n", t >= 3);
+    printf(" t>=5 = %d (0)\n", t >= 5);
+    printf("t>=-1 = %d (1)\n", t >= -1);
+    printf("\n");
+
+    pi = -100;
+    printf("   pi<4 = %d (0)\n", pi < (int*)4);
+    printf("   pi<3 = %d (0)\n", pi < (int*)3);
+    printf("pi<-100 = %d (0)\n", pi < (int*)-100);
+    printf("  pi<-1 = %d (1)\n", pi < (int*)-1);
+    printf("\n");
+
+    printf("   pi<=4 = %d (0)\n", pi <= (int*)4);
+    printf("   pi<=3 = %d (0)\n", pi <= (int*)3);
+    printf("pi<=-100 = %d (1)\n", pi <= (int*)-100);
+    printf("  pi<=-1 = %d (1)\n", pi <= (int*)-1);
+    printf("\n");
+
+    pi = -100;
+    printf("   pi>4 = %d (1)\n", pi > (int*)4);
+    printf("   pi>3 = %d (1)\n", pi > (int*)3);
+    printf("pi>-100 = %d (0)\n", pi > (int*)-100);
+    printf("  pi>-1 = %d (0)\n", pi > (int*)-1);
+    printf("\n");
+
+    printf("   pi>=4 = %d (1)\n", pi >= (int*)4);
+    printf("   pi>=3 = %d (1)\n", pi >= (int*)3);
+    printf("pi>=-100 = %d (1)\n", pi >= (int*)-100);
+    printf("  pi>=-1 = %d (0)\n", pi >= (int*)-1);
+    printf("\n");
+
+    pi = &arr[0];
+    pip = &arr[3];
+    printf("    *pip - *pi: %d (30)\n", *pip - *pi);
+    printf("      pip - pi: %d (3)\n",  pip - pi);
+    printf("          *pip: %d (40)\n", *pip);
+    printf("    *(pip - 3): %d (10)\n", *(pip - 3));
+    printf("      *&arr[3]: %d (40)\n", *&arr[3]);
+    printf("*(&arr[3] - 3): %d (10)\n", *(&arr[3]-3));
+}

share/smallerc/test2.c

@@ -0,0 +1,128 @@
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+int aaa;
+int bbb;
+int ccc;
+char gc;
+char gbuffer[3];
+int gibuffer[4];
+
+int main(void)
+{
+    char b;
+    int la;
+    unsigned int u1, u2;
+    int s1, s2;
+    unsigned char uc1, uc2;
+    char sc1, sc2;
+    int fd;
+    char buffer[6];
+    int ibuffer[7];
+
+    printf("                sizeof(uc1): %d 1\n",  sizeof(uc1));
+    printf("                sizeof(sc1): %d 1\n",  sizeof(sc1));
+    printf("                 sizeof(u1): %d 4\n",  sizeof(u1));
+    printf("                 sizeof(s1): %d 4\n",  sizeof(s1));
+    printf("                sizeof(aaa): %d 4\n",  sizeof(aaa));
+    printf("                sizeof(bbb): %d 4\n",  sizeof(bbb));
+    printf("                 sizeof(gc): %d 1\n",  sizeof(gc));
+    printf("             sizeof(buffer): %d 6\n",  sizeof(buffer));
+    printf("            sizeof(ibuffer): %d 28\n", sizeof(ibuffer));
+    printf("               sizeof(char): %d 1\n",  sizeof(char));
+    printf("                sizeof(int): %d 4\n",  sizeof(int));
+    printf("            sizeof(gbuffer): %d 3\n",  sizeof(gbuffer));
+    printf("           sizeof(gibuffer): %d 16\n", sizeof(gibuffer));
+    // sizeof(ibuffer[0]) is not supported, so the following can be used...
+    printf("sizeof(ibuffer)/sizeof(int): %d 7\n",  sizeof(ibuffer)/sizeof(int));
+
+    aaa = 1;
+    bbb = 2;
+    la = 4;
+    printf("%d 1\n", aaa);
+    printf("%d 2\n", bbb);
+    printf("%d 4\n", la);
+
+    uc1 = 0x80;
+    sc1 = 0x80;
+    s1 = uc1;
+    s2 = sc1;
+    printf("unsigned char (0x80) -> int: %d 128\n",  s1);
+    printf("  signed char (0x80) -> int: %d -128\n", s2);
+
+    u1 = uc1;
+    u2 = sc1;
+    printf("unsigned char (0x80) -> unsigned: %d 128\n", u1);
+    printf("  signed char (0x80) -> unsigned: %d -128\n", u2);
+
+    la = errno;
+    printf("errno: %d 0\n", la);
+
+    write(1, "abcd ", 5);
+    la = errno;
+    printf("errno after good write call: %d 0\n", la);
+
+    write(10, "abcde", 5);
+    la = errno;
+    printf("errno after bad write call: %d 9\n", la);
+
+    write(1, "abcd ", 5);
+    la = errno;
+    printf("good write after failed should not overwrite errno: %d 9\n", la);
+
+    errno = 0;
+    write(1, "abcd ", 5);
+    la = errno;
+    printf("good write after errno set to zero: %d 0\n", la);
+
+    la = write(1, "abcd ", 5);
+    printf("write() return: %d 5\n", la);
+
+    la = write(10, "abcd ", 5);
+    printf("write(bad fd) return: %d -1\n", la);
+
+    fd = open("/a.txt", O_WRONLY | O_CREAT, 0666);
+    if (fd != -1) {
+        printf("open success\n");
+        la = write(fd, "abcd\n", 5);
+        if (la == 5) printf("write success\n"); else  printf("write failed\n");
+        la = close(fd);
+        if (la != -1) printf("close success\n"); else printf("close failed\n");
+    } else {
+        printf("open failed\n");
+    }
+
+    buffer[0] = 0;
+    buffer[1] = 0;
+    buffer[2] = 0;
+    buffer[3] = 0;
+    buffer[4] = 0;
+    buffer[5] = 0;
+
+    fd = open("/a.txt", O_RDONLY, 0666);
+    if (fd != -1) {
+        printf("open success\n");
+        la = read(fd, buffer, 5);
+        printf(buffer);
+        if (la == 5) printf("read success\n"); else  printf("read failed\n");
+        la = close(fd);
+        if (la != -1) printf("close success\n"); else printf("close failed\n");
+    } else {
+        printf("open failed\n");
+    }
+
+    if (buffer[0] != 'a')  printf("data0 readback from file MISMATCH\n");
+    if (buffer[1] != 'b')  printf("data1 readback from file MISMATCH\n");
+    if (buffer[2] != 'c')  printf("data2 readback from file MISMATCH\n");
+    if (buffer[3] != 'd')  printf("data3 readback from file MISMATCH\n");
+    if (buffer[4] != '\n') printf("data4 readback from file MISMATCH\n");
+
+    if (buffer[0] != 'a' || buffer[1] != 'b' || buffer[2] != 'c' ||
+        buffer[3] != 'd' || buffer[4] != '\n') {
+        printf("data readback from file MISMATCH\n");
+    } else {
+        printf("data readback from file OK\n");
+    }
+}

share/smallerc/test3.c

@@ -0,0 +1,51 @@
+#include <stdio.h>
+
+void printt(int t, char* str);
+
+int main(void)
+{
+    int t;
+
+    t = 0;
+    if (t) printt(t, "failure"); else printt(t, "success");
+    t = 1;
+    if (t) printt(t, "success"); else printt(t, "failure");
+    t = 8;
+    if (t) printt(t, "success"); else printt(t, "failure");
+    t = -2;
+    if (t) printt(t, "success"); else printt(t, "failure");
+    printf("\n");
+
+    t = 4;
+    printf("switch test: ");
+    switch (t) {
+    case 3:
+        printf("failure");
+        break;
+    case 4:
+        printf("success");
+        break;
+    case 5:
+        printf("failure");
+        break;
+    }
+    printf("\n");
+
+    printf("switch fallthrough test: ");
+    switch (t) {
+    case 3:
+        printf("failure");
+        break;
+    case 4:
+        printf("OKSOFAR: ");
+    case 5:
+        printf("success if oksofar printed before this in caps");
+        break;
+    }
+    printf("\n");
+}
+
+void printt(int t, char* str)
+{
+    printf("bool test on value %d %s\n", t, str);
+}

src/Makefile

@@ -9,7 +9,7 @@ include $(TOPSRC)/target.mk
 # Programs that live in subdirectories, and have makefiles of their own.
 #
 SUBDIR		= startup-$(MACHINE) libc libm libutil libtermlib libcurses \
-                  libvmf libwiznet share cmd games
+                  libvmf libwiznet share cmd games man
 
 all:		$(SUBDIR)
 

src/cmd/Makefile

@@ -10,9 +10,9 @@ CFLAGS          += -Werror
 
 # Programs that live in subdirectories, and have makefiles of their own.
 # /bin
-SUBDIR		= adb adc-demo ar as awk basic cc chflags chpass \
-                  cpp dc diff env fdisk find forth fstat glcdtest hostname \
-                  id la lcc lcpp ld ls login make man med \
+SUBDIR		= adb adc-demo aout ar as awk basic cc chflags chpass \
+                  cpp dc diff emg env fdisk find forth fstat glcdtest \
+                  hostname id la lcc lcpp ld levee ls login make man med \
                   more nm passwd picoc portio printf pwm \
                   rdprof ranlib re renice retroforth scm setty sl \
                   sed sh smallc smlrc stty sysctl test uname wiznet xargs \

src/cmd/aout/.gitignore

@@ -0,0 +1 @@
+aout

src/cmd/aout/Makefile

@@ -0,0 +1,25 @@
+#
+# aout    - Display information from a.out files
+#
+TOPSRC		= $(shell cd ../../..; pwd)
+include $(TOPSRC)/target.mk
+#include $(TOPSRC)/cross.mk
+
+CFLAGS		+= -Werror -Wall -Os
+LDFLAGS         +=
+
+AOUTOBJS        = aout.o mips-dis.o
+
+all:            aout
+
+aout:           $(AOUTOBJS)
+		${CC} ${LDFLAGS} -o aout.elf $(AOUTOBJS) ${LIBS}
+		${OBJDUMP} -S aout.elf > aout.dis
+		${SIZE} aout.elf
+		${ELF2AOUT} aout.elf $@ && rm aout.elf
+
+clean:
+		rm -f *.o *.0 *.elf aout tags *~ *.dis
+
+install:        all
+		install aout $(DESTDIR)/bin/

src/cmd/as/Makefile

@@ -1,6 +1,5 @@
 #
 # as      - Assembler
-# aout    - Display information from a.out files
 #
 TOPSRC		= $(shell cd ../../..; pwd)
 include $(TOPSRC)/target.mk
@@ -9,9 +8,7 @@ include $(TOPSRC)/target.mk
 CFLAGS		+= -Werror -Wall -Os
 LDFLAGS         +=
 
-AOUTOBJS        = aout.o mips-dis.o
-
-all:            as aout
+all:            as
 
 as:             as.o
 		${CC} ${LDFLAGS} -o as.elf as.o ${LIBS}
@@ -19,26 +16,8 @@ as:             as.o
 		${SIZE} as.elf
 		${ELF2AOUT} as.elf $@ && rm as.elf
 
-aout:           $(AOUTOBJS)
-		${CC} ${LDFLAGS} -o aout.elf $(AOUTOBJS) ${LIBS}
-		${OBJDUMP} -S aout.elf > aout.dis
-		${SIZE} aout.elf
-		${ELF2AOUT} aout.elf $@ && rm aout.elf
-
 clean:
-		rm -f *.o *.0 *.elf as aout tags *~ *.dis tests/*.dis tests/*.gcc-dis tests/*.o
-
-test:
-		/usr/local/pic32-tools/bin/pic32-as -al example.s
+		rm -f *.o *.0 *.elf as tags *~ *.dis tests/*.dis tests/*.gcc-dis tests/*.o
 
 install:        all
 		install as $(DESTDIR)/bin/
-		install aout $(DESTDIR)/bin/
-
-test.dis-gcc:   test.s
-		$(AS) $< -o test.o
-		${OBJDUMP} -D test.o > $@
-
-test.dis:       test.s as aout
-		./as $< -o test.o
-		./aout test.o > $@

src/cmd/cpp/Makefile

@@ -3,7 +3,7 @@ include $(TOPSRC)/target.mk
 #include $(TOPSRC)/cross.mk
 #CFLAGS          = -DCROSS
 
-OBJS            = cpp.o cpy.o token.o doprnt.o
+OBJS            = cpp.o cpy.o token.o compat.o doprnt.o
 MAN             = cpp.0
 MANSRC          = cpp.1
 
@@ -31,7 +31,7 @@ install:        all
 		install cpp $(DESTDIR)/bin/
 		cp cpp.0 $(DESTDIR)/share/man/cat1/
 
-cpp.o:          cpp.c y.tab.h
+cpp.o:          cpp.c cpp.h y.tab.h config.h
 
 .l.o:
 		$(LEX) $(LFLAGS) $<
@@ -62,3 +62,9 @@ test:
 		cmp tests/run9 tests/res9
 		./cpp < tests/test10 > tests/run10
 		cmp tests/run10 tests/res10
+		./cpp < tests/test11 > tests/run11
+		cmp tests/run11 tests/res11
+		./cpp < tests/test12 > tests/run12
+		cmp tests/run12 tests/res12
+		./cpp < tests/test13 > tests/run13
+		cmp tests/run13 tests/res13

src/cmd/cpp/compat.c

@@ -0,0 +1,91 @@
+/*	$OpenBSD: strlcat.c,v 1.8 2001/05/13 15:40:15 deraadt Exp $	*/
+/*	$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $	*/
+/*
+ * Copyright (c) 1998, 2003-2005, 2010-2011, 2013
+ *	Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "config.h"
+#include <string.h>
+
+#ifndef HAVE_STRLCAT
+/*
+ * Appends src to string dst of size siz (unlike strncat, siz is the
+ * full size of dst, not space left).  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
+ * Returns strlen(src) + MIN(siz, strlen(initial dst)).
+ * If retval >= siz, truncation occurred.
+ */
+size_t
+strlcat(char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+	size_t dlen;
+
+	/* Find the end of dst and adjust bytes left but don't go past end */
+	while (n-- != 0 && *d != '\0')
+		d++;
+	dlen = d - dst;
+	n = siz - dlen;
+
+	if (n == 0)
+		return dlen + strlen(s);
+	while (*s != '\0') {
+		if (n != 1) {
+			*d++ = *s;
+			n--;
+		}
+		s++;
+	}
+	*d = '\0';
+
+	return dlen + (s - src);	/* count does not include NUL */
+}
+#endif /* HAVE_STRLCAT */
+
+#ifndef HAVE_STRLCPY
+/*
+ * Copy src to string dst of size siz.  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz == 0).
+ * Returns strlen(src); if retval >= siz, truncation occurred.
+ */
+size_t
+strlcpy(char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+
+	/* Copy as many bytes as will fit */
+	if (n != 0 && --n != 0) {
+		do {
+			if ((*d++ = *s++) == 0)
+				break;
+		} while (--n != 0);
+	}
+
+	/* Not enough room in dst, add NUL and traverse rest of src */
+	if (n == 0) {
+		if (siz != 0)
+			*d = '\0';		/* NUL-terminate dst */
+		while (*s++)
+			;
+	}
+
+	return s - src - 1;	/* count does not include NUL */
+}
+#endif /* HAVE_STRLCPY */

src/cmd/cpp/compat.h

@@ -0,0 +1,14 @@
+#ifndef COMPAT_H__
+#define COMPAT_H__
+
+#include <string.h>
+
+#ifndef HAVE_STRLCPY
+size_t strlcpy(char* dst, const char* src, size_t size);
+#endif
+
+#ifndef HAVE_STRLCAT
+size_t strlcat(char* dst, const char* src, size_t size);
+#endif
+
+#endif // COMPAT_H__

src/cmd/cpp/config.h

@@ -0,0 +1,11 @@
+#ifndef CONFIG_H__
+#define CONFIG_H__
+
+#define VERSSTR "cpp for RetroBSD"
+
+#define HAVE_UNISTD_H 1
+#define HAVE_SYS_WAIT_H 1
+//#define HAVE_STRLCPY 1
+//#define HAVE_STRLCAT 1
+
+#endif // CONFIG_H__

src/cmd/cpp/cpp.h

@@ -1,5 +1,7 @@
+/*	$Id: cpp.h,v 1.47.2.1 2011/02/26 06:36:40 ragge Exp $	*/
+
 /*
- * Copyright (c) 2004 Anders Magnusson (ragge@ludd.luth.se).
+ * Copyright (c) 2004,2010 Anders Magnusson (ragge@ludd.luth.se).
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -10,8 +12,6 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
@@ -24,25 +24,15 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-#ifdef CROSS
-#   include </usr/include/stdio.h>
-#   include </usr/include/ctype.h>
-#else
-#   include <stdio.h> /* for obuf */
-#   include <ctype.h>
-#endif
+
+#include <stdio.h> /* for obuf */
 #include <stdlib.h>
 
-/* Version string */
-#define VERSSTR "cpp for RetroBSD"
+#include "config.h"
 
-typedef unsigned char uchar;
-#ifdef YYTEXT_POINTER
-extern char *yytext;
-#else
-extern char yytext[];
-#endif
-extern uchar *stringbuf;
+typedef unsigned char usch;
+extern usch yytext[];
+extern usch *stringbuf;
 
 extern	int	trulvl;
 extern	int	flslvl;
@@ -50,7 +40,7 @@ extern	int	elflvl;
 extern	int	elslvl;
 extern	int	tflag, Cflag, Pflag;
 extern	int	Mflag, dMflag;
-extern	uchar	*Mfile;
+extern	usch	*Mfile;
 extern	int	ofd;
 
 /* args for lookup() */
@@ -58,32 +48,77 @@ extern	int	ofd;
 #define ENTER   1
 
 /* buffer used internally */
-#define CPPBUF  512
+#define CPPBUF	512
+#ifndef CPPBUF
+#if defined(__pdp11__)
+#define CPPBUF  BUFSIZ
+#define	BUF_STACK
+#elif defined(WIN32)
+/* winxp seems to fail > 26608 bytes */
+#define CPPBUF	16384
+#else
+#define CPPBUF	(65536*2)
+#endif
+#endif
+
+#define	MAXARGS	20//128	/* Max # of args to a macro. Should be enouth */
 
 #define	NAMEMAX	CPPBUF	/* currently pushbackbuffer */
+#define	BBUFSZ	(NAMEMAX+CPPBUF+1)
+
+#define GCCARG	0xfd	/* has gcc varargs that may be replaced with 0 */
+#define VARG	0xfe	/* has varargs */
+#define OBJCT	0xff
+#define WARN	1	/* SOH, not legal char */
+#define CONC	2	/* STX, not legal char */
+#define SNUFF	3	/* ETX, not legal char */
+#define	EBLOCK	4	/* EOT, not legal char */
+
+/* Used in macro expansion */
+#define RECMAX	400//10000			/* max # of recursive macros */
+extern struct symtab *norep[RECMAX];
+extern int norepptr;
+extern unsigned short bptr[RECMAX];
+extern int bidx;
+#define	MKB(l,h)	(l+((h)<<8))
+
+/* quick checks for some characters */
+#define C_SPEC	001
+#define C_EP	002
+#define C_ID	004
+#define C_I	(C_SPEC|C_ID)		
+#define C_2	010		/* for yylex() tokenizing */
+#define	C_WSNL	020		/* ' ','\t','\r','\n' */
+#define	iswsnl(x) (spechr[x] & C_WSNL)
+extern char spechr[];
 
 /* definition for include file info */
 struct includ {
 	struct includ *next;
-	const uchar *fname;	/* current fn, changed if #line found */
-	const uchar *orgfn;	/* current fn, not changed */
+	const usch *fname;	/* current fn, changed if #line found */
+	const usch *orgfn;	/* current fn, not changed */
 	int lineno;
 	int infil;
-	uchar *curptr;
-	uchar *maxread;
-	uchar *ostr;
-	uchar *buffer;
+	usch *curptr;
+	usch *maxread;
+	usch *ostr;
+	usch *buffer;
 	int idx;
 	void *incs;
-	const uchar *fn;
-	uchar bbuf[NAMEMAX+CPPBUF+1];
-} *ifiles;
+	const usch *fn;
+#ifdef BUF_STACK
+	usch bbuf[BBUFSZ];
+#else
+	usch *bbuf;
+#endif
+};
+extern struct includ *ifiles;
 
 /* Symbol table entry  */
 struct symtab {
-	const uchar *namep;
-	const uchar *value;
-	const uchar *file;
+	const usch *namep;    
+	const usch *value;    
+	const usch *file;
 	int line;
 };
 
@@ -110,13 +145,15 @@ struct nd {
 #define nd_val n.val
 #define nd_uval n.uval
 
-struct recur;	/* not used outside cpp.c */
-int subst(struct symtab *, struct recur *);
-struct symtab *lookup(const uchar *namep, int enterf);
-uchar *gotident(struct symtab *nl);
-int slow;	/* scan slowly for new tokens */
+struct symtab *lookup(const usch *namep, int enterf);
+usch *gotident(struct symtab *nl);
+extern int slow;	/* scan slowly for new tokens */
+int submac(struct symtab *nl, int);
+int kfind(struct symtab *nl);
+int doexp(void);
+int donex(void);
 
-int pushfile(const uchar *fname, const uchar *fn, int idx, void *incs);
+int pushfile(const usch *fname, const usch *fn, int idx, void *incs);
 void popfile(void);
 void prtline(void);
 int yylex(void);
@@ -128,18 +165,22 @@ void setline(int);
 void setfile(char *);
 int yyparse(void);
 void yyerror(const char *);
-void unpstr(const uchar *);
-uchar *savstr(const uchar *str);
+void unpstr(const usch *);
+usch *savstr(const usch *str);
 void savch(int c);
 void mainscan(void);
 void putch(int);
-void putstr(const uchar *s);
+void putstr(const usch *s);
 void line(void);
-uchar *sheap(const char *fmt, ...);
-void xwarning(uchar *);
-void xerror(uchar *);
-#define warning(args...) xwarning(sheap(args))
-#define error(args...) xerror(sheap(args))
-void expmac(struct recur *);
+usch *sheap(const char *fmt, ...);
+void xwarning(usch *);
+void xerror(usch *);
+#ifdef HAVE_CPP_VARARG_MACRO_GCC
+#define warning(...) xwarning(sheap(__VA_ARGS__))
+#define error(...) xerror(sheap(__VA_ARGS__))
+#else
+#define warning printf
+#define error printf
+#endif
 int cinput(void);
 void getcmnt(void);

src/cmd/cpp/cpy.y

@@ -1,3 +1,5 @@
+/*	$Id: cpy.y,v 1.18 2010/02/25 15:49:00 ragge Exp $	*/
+
 /*
  * Copyright (c) 2004 Anders Magnusson (ragge@ludd.luth.se).
  * All rights reserved.
@@ -58,6 +60,7 @@
  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
+
 %{
 
 #include "cpp.h"

src/cmd/cpp/scanner.l

@@ -0,0 +1,939 @@
+%{
+/*	$Id: scanner.l,v 1.49 2009/02/14 09:23:55 ragge Exp $   */
+
+/*
+ * Copyright (c) 2004 Anders Magnusson. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <errno.h>
+
+#include "compat.h"
+#include "cpp.h"
+#include "y.tab.h"
+%}
+
+%{
+static void cvtdig(int rad);
+static int charcon(usch *);
+static void elsestmt(void);
+static void ifdefstmt(void);
+static void ifndefstmt(void);
+static void endifstmt(void);
+static void ifstmt(void);
+static void cpperror(void);
+static void pragmastmt(void);
+static void undefstmt(void);
+static void cpperror(void);
+static void elifstmt(void);
+static void storepb(void);
+static void badop(const char *);
+void  include(void);
+void  define(void);
+
+extern int yyget_lineno (void);
+extern void yyset_lineno (int);
+
+static int inch(void);
+
+static int scale, gotdef, contr;
+int inif;
+
+#ifdef FLEX_SCANNER /* should be set by autoconf instead */
+static int
+yyinput(char *b, int m)
+{
+	int c, i;
+
+	for (i = 0; i < m; i++) {
+		if ((c = inch()) < 0)
+			break;
+		*b++ = c;
+		if (c == '\n') {
+			i++;
+			break;
+		}
+	}
+	return i;
+}
+#undef YY_INPUT
+#undef YY_BUF_SIZE
+#define	YY_BUF_SIZE (8*65536)
+#define YY_INPUT(b,r,m) (r = yyinput(b, m))
+#ifdef HAVE_CPP_VARARG_MACRO_GCC
+#define fprintf(x, ...) error(__VA_ARGS__)
+#endif
+#define	ECHO putstr((usch *)yytext)
+#undef fileno
+#define fileno(x) 0
+
+#if YY_FLEX_SUBMINOR_VERSION >= 31
+/* Hack to avoid unnecessary warnings */
+FILE *yyget_in	(void);
+FILE *yyget_out  (void);
+int yyget_leng	(void);
+char *yyget_text  (void);
+void yyset_in (FILE *  in_str );
+void yyset_out (FILE *	out_str );
+int yyget_debug  (void);
+void yyset_debug (int  bdebug );
+int yylex_destroy  (void);
+#endif
+#else	/* Assume lex here */
+#undef input
+#undef unput
+#define input() inch()
+#define unput(ch) unch(ch)
+#endif
+#define PRTOUT(x) if (YYSTATE || slow) return x; if (!flslvl) putstr((usch *)yytext);
+/* protection against recursion in #include */
+#define MAX_INCLEVEL	100
+static int inclevel;
+%}
+
+D	[0-9]
+L	[a-zA-Z_]
+H	[a-fA-F0-9]
+E	[Ee][+-]?{D}+
+FS	(f|F|l|L)
+IS	(u|U|l|L)*
+WS	[\t ]
+
+%s IFR CONTR DEF COMMENT
+
+%%
+
+"\n"			{	int os = YYSTATE;
+				if (os != IFR)
+					BEGIN 0;
+				ifiles->lineno++;
+				if (flslvl == 0) {
+					if (ifiles->lineno == 1)
+						prtline();
+					else
+						putch('\n');
+				}
+				if ((os != 0 || slow) && !contr)
+					return '\n';
+				contr = 0;
+			}
+
+"\r"			{ ; /* Ignore CR's */ }
+
+<IFR>"++"		{ badop("++"); }
+<IFR>"--"		{ badop("--"); }
+<IFR>"=="		{ return EQ; }
+<IFR>"!="		{ return NE; }
+<IFR>"<="		{ return LE; }
+<IFR>"<<"		{ return LS; }
+<IFR>">>"		{ return RS; }
+<IFR>">="		{ return GE; }
+<IFR>"||"		{ return OROR; }
+<IFR>"&&"		{ return ANDAND; }
+<IFR>"defined"		{	int p, c;
+				gotdef = 1;
+				if ((p = c = yylex()) == '(')
+					c = yylex();
+				if (c != IDENT || (p != IDENT && p != '('))
+					error("syntax error");
+				if (p == '(' && yylex() != ')')
+					error("syntax error");
+				return NUMBER;
+			}
+
+<IFR>{WS}+		{ ; }
+<IFR>{L}({L}|{D})*	{
+				yylval.node.op = NUMBER;
+				if (gotdef) {
+					yylval.node.nd_val
+					    = lookup((usch *)yytext, FIND) != 0;
+					gotdef = 0;
+					return IDENT;
+				}
+				yylval.node.nd_val = 0;
+				return NUMBER;
+			}
+
+[0-9][0-9]*		{
+				if (slow && !YYSTATE)
+					return IDENT;
+				scale = yytext[0] == '0' ? 8 : 10;
+				goto num;
+			}
+
+0[xX]{H}+{IS}?		{	scale = 16;
+			num:	if (YYSTATE == IFR) 
+					cvtdig(scale);
+				PRTOUT(NUMBER);
+			}
+0{D}+{IS}?		{ scale = 8; goto num; }
+{D}+{IS}?		{ scale = 10; goto num; }
+'(\\.|[^\\'])+'		{
+				if (YYSTATE || slow) {
+					yylval.node.op = NUMBER;
+					yylval.node.nd_val = charcon((usch *)yytext);
+					return (NUMBER);
+				}
+				if (tflag)
+					yyless(1);
+				if (!flslvl)
+					putstr((usch *)yytext);
+			}
+
+<IFR>.			{ return yytext[0]; }
+
+{D}+{E}{FS}?		{ PRTOUT(FPOINT); }
+{D}*"."{D}+({E})?{FS}?	{ PRTOUT(FPOINT); }
+{D}+"."{D}*({E})?{FS}?	{ PRTOUT(FPOINT); }
+
+^{WS}*#{WS}*		{	extern int inmac;
+
+				if (inmac)
+					error("preprocessor directive found "
+					    "while expanding macro");
+				contr = 1;
+				BEGIN CONTR;
+			}
+{WS}+			{ PRTOUT(WSPACE); }
+
+<CONTR>"ifndef"		{ contr = 0; ifndefstmt(); }
+<CONTR>"ifdef"		{ contr = 0; ifdefstmt(); }
+<CONTR>"if"		{ contr = 0; storepb(); BEGIN IFR; ifstmt(); BEGIN 0; }
+<CONTR>"include"	{ contr = 0; BEGIN 0; include(); prtline(); }
+<CONTR>"else"		{ contr = 0; elsestmt(); }
+<CONTR>"endif"		{ contr = 0; endifstmt(); }
+<CONTR>"error"		{ contr = 0; if (slow) return IDENT; cpperror(); BEGIN 0; }
+<CONTR>"define"		{ contr = 0; BEGIN DEF; define(); BEGIN 0; }
+<CONTR>"undef"		{ contr = 0; if (slow) return IDENT; undefstmt(); }
+<CONTR>"line"		{ contr = 0; storepb(); BEGIN 0; line(); }
+<CONTR>"pragma"		{ contr = 0; pragmastmt(); BEGIN 0; }
+<CONTR>"elif"		{ contr = 0; storepb(); BEGIN IFR; elifstmt(); BEGIN 0; }
+
+
+
+"//".*$			{ /* if (tflag) yyless(..) */
+				if (Cflag && !flslvl && !slow)
+					putstr((usch *)yytext);
+				else if (!flslvl)
+					putch(' ');
+			}
+"/*"			{	int c, wrn;
+				int prtcm = Cflag && !flslvl && !slow;
+				extern int readmac;
+
+				if (Cflag && !flslvl && readmac)
+					return CMNT;
+
+				if (prtcm)
+					putstr((usch *)yytext);
+				wrn = 0;
+			more:	while ((c = input()) && c != '*') {
+					if (c == '\n')
+						putch(c), ifiles->lineno++;
+					else if (c == 1) /* WARN */
+						wrn = 1;
+					else if (prtcm)
+						putch(c);
+				}
+				if (c == 0)
+					return 0;
+				if (prtcm)
+					putch(c);
+				if ((c = input()) && c != '/') {
+					unput(c);
+					goto more;
+				}
+				if (prtcm)
+					putch(c);
+				if (c == 0)
+					return 0;
+				if (!tflag && !Cflag && !flslvl)
+					unput(' ');
+				if (wrn)
+					unput(1);
+			}
+
+<DEF>"##"		{ return CONCAT; }
+<DEF>"#"		{ return MKSTR; }
+<DEF>"..."		{ return ELLIPS; }
+<DEF>"__VA_ARGS__"	{ return VA_ARGS; }
+
+L?\"(\\.|[^\\"])*\"	{ PRTOUT(STRING); }
+[a-zA-Z_0-9]+		{ /* {L}({L}|{D})* */
+				struct symtab *nl;
+				if (slow)
+					return IDENT;
+				if (YYSTATE == CONTR) {
+					if (flslvl == 0) {
+						/*error("undefined control");*/
+						while (input() != '\n')
+							;
+						unput('\n');
+						BEGIN 0;
+						goto xx;
+					} else {
+						BEGIN 0; /* do nothing */
+					}
+				}
+				if (flslvl) {
+					; /* do nothing */
+				} else if (isdigit((int)yytext[0]) == 0 &&
+				    (nl = lookup((usch *)yytext, FIND)) != 0) {
+					usch *op = stringbuf;
+					putstr(gotident(nl));
+					stringbuf = op;
+				} else
+					putstr((usch *)yytext);
+				xx: ;
+			}
+
+.			{
+				if (contr) {
+					while (input() != '\n')
+						;
+					unput('\n');
+					BEGIN 0;
+					contr = 0;
+					goto yy;
+				}
+				if (YYSTATE || slow)
+					return yytext[0];
+				if (yytext[0] == 6) { /* PRAGS */
+					usch *obp = stringbuf;
+					extern usch *prtprag(usch *);
+					*stringbuf++ = yytext[0];
+					do {
+						*stringbuf = input();
+					} while (*stringbuf++ != 14);
+					prtprag(obp);
+					stringbuf = obp;
+				} else {
+					PRTOUT(yytext[0]);
+				}
+				yy:;
+			}
+
+%%
+
+usch *yyp, yybuf[CPPBUF];
+
+int yylex(void);
+int yywrap(void);
+
+static int
+inpch(void)
+{
+	int len;
+
+	if (ifiles->curptr < ifiles->maxread)
+		return *ifiles->curptr++;
+
+	if ((len = read(ifiles->infil, ifiles->buffer, CPPBUF)) < 0)
+		error("read error on file %s", ifiles->orgfn);
+	if (len == 0)
+		return -1;
+	ifiles->curptr = ifiles->buffer;
+	ifiles->maxread = ifiles->buffer + len;
+	return inpch();
+}
+
+#define unch(c) *--ifiles->curptr = c
+
+static int
+inch(void)
+{
+	int c;
+
+again:	switch (c = inpch()) {
+	case '\\': /* continued lines */
+msdos:		if ((c = inpch()) == '\n') {
+			ifiles->lineno++;
+			putch('\n');
+			goto again;
+		} else if (c == '\r')
+			goto msdos;
+		unch(c);
+		return '\\';
+	case '?': /* trigraphs */
+		if ((c = inpch()) != '?') {
+			unch(c);
+			return '?';
+		}
+		switch (c = inpch()) {
+		case '=': c = '#'; break;
+		case '(': c = '['; break;
+		case ')': c = ']'; break;
+		case '<': c = '{'; break;
+		case '>': c = '}'; break;
+		case '/': c = '\\'; break;
+		case '\'': c = '^'; break;
+		case '!': c = '|'; break;
+		case '-': c = '~'; break;
+		default:
+			unch(c);
+			unch('?');
+			return '?';
+		}
+		unch(c);
+		goto again;
+	default:
+		return c;
+	}
+}
+
+/*
+ * Let the command-line args be faked defines at beginning of file.
+ */
+static void
+prinit(struct initar *it, struct includ *ic)
+{
+	char *a, *pre, *post;
+
+	if (it->next)
+		prinit(it->next, ic);
+	pre = post = NULL; /* XXX gcc */
+	switch (it->type) {
+	case 'D':
+		pre = "#define ";
+		if ((a = strchr(it->str, '=')) != NULL) {
+			*a = ' ';
+			post = "\n";
+		} else
+			post = " 1\n";
+		break;
+	case 'U':
+		pre = "#undef ";
+		post = "\n";
+		break;
+	case 'i':
+		pre = "#include \"";
+		post = "\"\n";
+		break;
+	default:
+		error("prinit");
+	}
+	strlcat((char *)ic->buffer, pre, CPPBUF+1);
+	strlcat((char *)ic->buffer, it->str, CPPBUF+1);
+	if (strlcat((char *)ic->buffer, post, CPPBUF+1) >= CPPBUF+1)
+		error("line exceeds buffer size");
+
+	ic->lineno--;
+	while (*ic->maxread)
+		ic->maxread++;
+}
+
+/*
+ * A new file included.
+ * If ifiles == NULL, this is the first file and already opened (stdin).
+ * Return 0 on success, -1 if file to be included is not found.
+ */
+int
+pushfile(usch *file)
+{
+	extern struct initar *initar;
+	struct includ ibuf;
+	struct includ *ic;
+	int c, otrulvl;
+
+	ic = &ibuf;
+	ic->next = ifiles;
+
+	slow = 0;
+	if (file != NULL) {
+		if ((ic->infil = open((char *)file, O_RDONLY)) < 0)
+			return -1;
+		ic->orgfn = ic->fname = file;
+		if (++inclevel > MAX_INCLEVEL)
+			error("Limit for nested includes exceeded");
+	} else {
+		ic->infil = 0;
+		ic->orgfn = ic->fname = (usch *)"<stdin>";
+	}
+	ic->buffer = ic->bbuf+NAMEMAX;
+	ic->curptr = ic->buffer;
+	ifiles = ic;
+	ic->lineno = 1;
+	ic->maxread = ic->curptr;
+	prtline();
+	if (initar) {
+		*ic->maxread = 0;
+		prinit(initar, ic);
+		if (dMflag)
+			write(ofd, ic->buffer, strlen((char *)ic->buffer));
+		initar = NULL;
+	}
+
+	otrulvl = trulvl;
+
+	if ((c = yylex()) != 0)
+		error("yylex returned %d", c);
+
+	if (otrulvl != trulvl || flslvl)
+		error("unterminated conditional");
+
+	ifiles = ic->next;
+	close(ic->infil);
+	inclevel--;
+	return 0;
+}
+
+/*
+ * Print current position to output file.
+ */
+void
+prtline()
+{
+	usch *s, *os = stringbuf;
+
+	if (Mflag) {
+		if (dMflag)
+			return; /* no output */
+		if (ifiles->lineno == 1) {
+			s = sheap("%s: %s\n", Mfile, ifiles->fname);
+			write(ofd, s, strlen((char *)s));
+		}
+	} else if (!Pflag)
+		putstr(sheap("# %d \"%s\"\n", ifiles->lineno, ifiles->fname));
+	stringbuf = os;
+}
+
+void
+cunput(int c)
+{
+#ifdef CPP_DEBUG
+	extern int dflag;
+	if (dflag)printf(": '%c'(%d)", c > 31 ? c : ' ', c);
+#endif
+	unput(c);
+}
+
+int yywrap(void) { return 1; }
+
+static int
+dig2num(int c)
+{
+	if (c >= 'a')
+		c = c - 'a' + 10;
+	else if (c >= 'A')
+		c = c - 'A' + 10;
+	else
+		c = c - '0';
+	return c;
+}
+
+/*
+ * Convert string numbers to unsigned long long and check overflow.
+ */
+static void
+cvtdig(int rad)
+{
+	unsigned long long rv = 0;
+	unsigned long long rv2 = 0;
+	char *y = yytext;
+	int c;
+
+	c = *y++;
+	if (rad == 16)
+		y++;
+	while (isxdigit(c)) {
+		rv = rv * rad + dig2num(c);
+		/* check overflow */
+		if (rv / rad < rv2)
+			error("Constant \"%s\" is out of range", yytext);
+		rv2 = rv;
+		c = *y++;
+	}
+	y--;
+	while (*y == 'l' || *y == 'L')
+		y++;
+	yylval.node.op = *y == 'u' || *y == 'U' ? UNUMBER : NUMBER;
+	yylval.node.nd_uval = rv;
+	if ((rad == 8 || rad == 16) && yylval.node.nd_val < 0)
+		yylval.node.op = UNUMBER;
+	if (yylval.node.op == NUMBER && yylval.node.nd_val < 0)
+		/* too large for signed */
+		error("Constant \"%s\" is out of range", yytext);
+}
+
+static int
+charcon(usch *p)
+{
+	int val, c;
+
+	p++; /* skip first ' */
+	val = 0;
+	if (*p++ == '\\') {
+		switch (*p++) {
+		case 'a': val = '\a'; break;
+		case 'b': val = '\b'; break;
+		case 'f': val = '\f'; break;
+		case 'n': val = '\n'; break;
+		case 'r': val = '\r'; break;
+		case 't': val = '\t'; break;
+		case 'v': val = '\v'; break;
+		case '\"': val = '\"'; break;
+		case '\'': val = '\''; break;
+		case '\\': val = '\\'; break;
+		case 'x':
+			while (isxdigit(c = *p)) {
+				val = val * 16 + dig2num(c);
+				p++;
+			}
+			break;
+		case '0': case '1': case '2': case '3': case '4':
+		case '5': case '6': case '7':
+			p--;
+			while (isdigit(c = *p)) {
+				val = val * 8 + (c - '0');
+				p++;
+			}
+			break;
+		default: val = p[-1];
+		}
+
+	} else
+		val = p[-1];
+	return val;
+}
+
+static void
+chknl(int ignore)
+{
+	int t;
+
+	slow = 1;
+	while ((t = yylex()) == WSPACE)
+		;
+	if (t != '\n') {
+		if (ignore) {
+			warning("newline expected, got \"%s\"", yytext);
+			/* ignore rest of line */
+			while ((t = yylex()) && t != '\n')
+				;
+		}
+		else
+			error("newline expected, got \"%s\"", yytext);
+	}
+	slow = 0;
+}
+
+static void
+elsestmt(void)
+{
+	if (flslvl) {
+		if (elflvl > trulvl)
+			;
+		else if (--flslvl!=0) {
+			flslvl++;
+		} else {
+			trulvl++;
+			prtline();
+		}
+	} else if (trulvl) {
+		flslvl++;
+		trulvl--;
+	} else
+		error("If-less else");
+	if (elslvl==trulvl+flslvl)
+		error("Too many else");
+	elslvl=trulvl+flslvl;
+	chknl(1);
+}
+
+static void
+ifdefstmt(void)		 
+{ 
+	int t;
+
+	if (flslvl) {
+		/* just ignore the rest of the line */
+		while (input() != '\n')
+			;
+		unput('\n');
+		yylex();
+		flslvl++;
+		return;
+	}
+	slow = 1;
+	do
+		t = yylex();
+	while (t == WSPACE);
+	if (t != IDENT)
+		error("bad ifdef");
+	slow = 0;
+	if (flslvl == 0 && lookup((usch *)yytext, FIND) != 0)
+		trulvl++;
+	else
+		flslvl++;
+	chknl(0);
+}
+
+static void
+ifndefstmt(void)	  
+{ 
+	int t;
+
+	slow = 1;
+	do
+		t = yylex();
+	while (t == WSPACE);
+	if (t != IDENT)
+		error("bad ifndef");
+	slow = 0;
+	if (flslvl == 0 && lookup((usch *)yytext, FIND) == 0)
+		trulvl++;
+	else
+		flslvl++;
+	chknl(0);
+}
+
+static void
+endifstmt(void)		 
+{
+	if (flslvl) {
+		flslvl--;
+		if (flslvl == 0)
+			prtline();
+	} else if (trulvl)
+		trulvl--;
+	else
+		error("If-less endif");
+	if (flslvl == 0)
+		elflvl = 0;
+	elslvl = 0;
+	chknl(1);
+}
+
+/*
+ * Note! Ugly!
+ * Walk over the string s and search for defined, and replace it with 
+ * spaces and a 1 or 0. 
+ */
+static void
+fixdefined(usch *s)
+{
+	usch *bc, oc;
+
+	for (; *s; s++) {
+		if (*s != 'd')
+			continue;
+		if (memcmp(s, "defined", 7))
+			continue;
+		/* Ok, got defined, can scratch it now */
+		memset(s, ' ', 7);
+		s += 7;
+#define	WSARG(x) (x == ' ' || x == '\t')
+		if (*s != '(' && !WSARG(*s))
+			continue;
+		while (WSARG(*s))
+			s++;
+		if (*s == '(')
+			s++;
+		while (WSARG(*s))
+			s++;
+#define IDARG(x) ((x>= 'A' && x <= 'Z') || (x >= 'a' && x <= 'z') || (x == '_'))
+#define	NUMARG(x) (x >= '0' && x <= '9')
+		if (!IDARG(*s))
+			error("bad defined arg");
+		bc = s;
+		while (IDARG(*s) || NUMARG(*s))
+			s++;
+		oc = *s;
+		*s = 0;
+		*bc = (lookup(bc, FIND) != 0) + '0';
+		memset(bc+1, ' ', s-bc-1);
+		*s = oc;
+	}
+}
+
+/*
+ * get the full line of identifiers after an #if, pushback a WARN and
+ * the line and prepare for expmac() to expand.
+ * This is done before switching state.  When expmac is finished,
+ * pushback the expanded line, change state and call yyparse.
+ */
+static void
+storepb(void)
+{
+	usch *opb = stringbuf;
+	int c;
+
+	while ((c = input()) != '\n') {
+		if (c == '/') {
+			 if ((c = input()) == '*') {
+				/* ignore comments here whatsoever */
+				usch *g = stringbuf;
+				getcmnt();
+				stringbuf = g;
+				continue;
+			} else if (c == '/') {
+				while ((c = input()) && c != '\n')
+					;
+				break;
+			}
+			unput(c);
+			c = '/';
+		}
+		savch(c);
+	}
+	cunput('\n');
+	savch(0);
+	fixdefined(opb); /* XXX can fail if #line? */
+	cunput(1); /* WARN XXX */
+	unpstr(opb);
+	stringbuf = opb;
+	slow = 1;
+	expmac(NULL);
+	slow = 0;
+	/* line now expanded */
+	while (stringbuf > opb)
+		cunput(*--stringbuf);
+}
+
+static void
+ifstmt(void)
+{
+	if (flslvl == 0) {
+		slow = 1;
+		if (yyparse())
+			++trulvl;
+		else
+			++flslvl;
+		slow = 0;
+	} else
+		++flslvl;
+}
+
+static void
+elifstmt(void)
+{
+	if (flslvl == 0)
+		elflvl = trulvl;
+	if (flslvl) {
+		if (elflvl > trulvl)
+			;
+		else if (--flslvl!=0)
+			++flslvl;
+		else {
+			slow = 1;
+			if (yyparse()) {
+				++trulvl;
+				prtline();
+			} else
+				++flslvl;
+			slow = 0;
+		}
+	} else if (trulvl) {
+		++flslvl;
+		--trulvl;
+	} else
+		error("If-less elif");
+}
+
+static usch *
+svinp(void)
+{
+	int c;
+	usch *cp = stringbuf;
+
+	while ((c = input()) && c != '\n')
+		savch(c);
+	savch('\n');
+	savch(0);
+	BEGIN 0;
+	return cp;
+}
+
+static void
+cpperror(void)
+{
+	usch *cp;
+	int c;
+
+	if (flslvl)
+		return;
+	c = yylex();
+	if (c != WSPACE && c != '\n')
+		error("bad error");
+	cp = svinp();
+	if (flslvl)
+		stringbuf = cp;
+	else
+		error("%s", cp);
+}
+
+static void
+undefstmt(void)
+{
+	struct symtab *np;
+
+	slow = 1;
+	if (yylex() != WSPACE || yylex() != IDENT)
+		error("bad undef");
+	if (flslvl == 0 && (np = lookup((usch *)yytext, FIND)))
+		np->value = 0;
+	slow = 0;
+	chknl(0);
+}
+
+static void
+pragmastmt(void)
+{
+	int c;
+
+	slow = 1;
+	if (yylex() != WSPACE)
+		error("bad pragma");
+	if (!flslvl)
+		putstr((usch *)"#pragma ");
+	do {
+		c = input();
+		if (!flslvl)
+			putch(c);	/* Do arg expansion instead? */
+	} while (c && c != '\n');
+	ifiles->lineno++;
+	prtline();
+	slow = 0;
+}
+
+static void
+badop(const char *op)
+{
+	error("invalid operator in preprocessor expression: %s", op);
+}
+
+int
+cinput()
+{
+	return input();
+}

src/cmd/cpp/tests/res11

@@ -0,0 +1,22 @@
+
+# 1 "<stdin>"
+
+
+
+
+
+a
+a b
+a b c
+a b c d 
+
+
+
+
+
+
+__attribute__((__noreturn__))
+
+
+1  2
+

src/cmd/cpp/tests/res12

@@ -0,0 +1,21 @@
+
+# 1 "<stdin>"
+
+
+
+
+
+2 2 2  2 2;
+
+
+
+
+
+
+
+
+
+
+
+
+(0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0, (0 + 8) + 0,

src/cmd/cpp/tests/res13

@@ -0,0 +1,13 @@
+
+# 1 "<stdin>"
+
+
+
+
+long
+
+
+
+
+
+

src/cmd/cpp/tests/res2

@@ -15,7 +15,8 @@
 
 
 f(2 * (y+1)) + f(2 * (f(2 * (z[0])))) % f(2 * (0)) + t(1);
-f(2 * (2+(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
+f(2 * (2+(3,4)-0,1)) | f(2 * (~ 5)) & 
+f(2 * (0,1))^m(0,1);
 int i[] = { 1, 23, 4, 5,  };
 char c[2][6] = { "hello", "" };
 

src/cmd/cpp/tests/test11

@@ -0,0 +1,20 @@
+#define D1(s, ...) s
+#define D2(s, ...) s D1(__VA_ARGS__)
+#define D3(s, ...) s D2(__VA_ARGS__)
+#define D4(s, ...) s D3(__VA_ARGS__)
+
+D1(a)
+D2(a, b)
+D3(a, b, c)
+D4(a, b, c, d) 
+
+
+#define __sun_attr___noreturn__ __attribute__((__noreturn__))
+#define ___sun_attr_inner(__a) __sun_attr_##__a
+#define __sun_attr__(__a) ___sun_attr_inner __a
+#define __NORETURN __sun_attr__((__noreturn__))
+__NORETURN
+#define X(...)
+#define Y(...)  1 __VA_ARGS__ 2
+Y(X X() ())
+

src/cmd/cpp/tests/test12

@@ -0,0 +1,19 @@
+#define y 2
+#define fe(p)       sfe(p) p
+#define sfe(p)    p
+#define Y fe(y) y  fe(y)
+
+Y;
+
+#    define S2B_QMIN 0
+#  define S2B_CMIN (S2B_QMIN + 8)
+#define S2B_1(i)        i,
+#define S2B_2(i)        S2B_1(i) S2B_1(i)
+#define S2B_4(i)        S2B_2(i) S2B_2(i)
+#define S2B_8(i)        S2B_4(i) S2B_4(i)
+#define S2B_16(i)       S2B_8(i) S2B_8(i)
+#define S2B_32(i)       S2B_16(i) S2B_16(i)
+#define S2B_64(i)       S2B_32(i) S2B_32(i)
+#define S2B_128(i)      S2B_64(i) S2B_64(i)
+#define S2B_256(i)      S2B_128(i) S2B_128(i)
+S2B_256(S2B_CMIN + 0)

src/cmd/cpp/tests/test13

@@ -0,0 +1,11 @@
+
+#define UL long, foo
+#define D(I,F) I
+#define E(I) D(I)
+E(UL)
+
+#define FOO 1
+
+#if (FOO == 1)
+
+#endif /* FOO */ 

src/cmd/cpp/token.c

@@ -1,3 +1,5 @@
+/*	$Id: token.c,v 1.48.2.2 2011/03/12 17:08:26 ragge Exp $	*/
+
 /*
  * Copyright (c) 2004,2009 Anders Magnusson. All rights reserved.
  *
@@ -37,21 +39,24 @@
  *	- inch() is like inpch but \\n and trigraphs are expanded.
  *	- unch() pushes back a character to the input stream.
  */
-#ifdef CROSS
-#   include </usr/include/string.h>
-#else
-#   include <string.h>
-#endif
+
+#include "config.h"
+
 #include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <fcntl.h>
 #include <errno.h>
 
+#include "compat.h"
 #include "cpp.h"
 #include "y.tab.h"
 
 static void cvtdig(int rad);
-static int charcon(uchar *);
+static int charcon(usch *);
 static void elsestmt(void);
 static void ifdefstmt(void);
 static void ifndefstmt(void);
@@ -75,9 +80,8 @@ extern void yyset_lineno (int);
 
 static int inch(void);
 
-size_t strlcat(char *dst, const char *src, size_t siz);
-
 int inif;
+extern int dflag;
 
 #define	PUTCH(ch) if (!flslvl) putch(ch)
 /* protection against recursion in #include */
@@ -87,25 +91,16 @@ static int inclevel;
 /* get next character unaltered */
 #define	NXTCH() (ifiles->curptr < ifiles->maxread ? *ifiles->curptr++ : inpch())
 
-#ifdef YYTEXT_POINTER
-static char buf[CPPBUF];
-char *yytext = buf;
-#else
-char yytext[CPPBUF];
-#endif
+usch yytext[CPPBUF];
 
-#define	C_SPEC	1
-#define	C_EP	2
-#define	C_ID	4
-#define	C_I	(C_SPEC|C_ID)
-#define	C_2	8		/* for yylex() tokenizing */
-static const char spechr[256] = {
-	0,	0,	0,	0,	0,	0,	0,	0,
-	0,	0,	C_SPEC,	0,	0,	0,	0,	0,
+char spechr[256] = {
+	0,	0,	0,	0,	C_SPEC,	C_SPEC,	0,	0,
+	0,	C_WSNL,	C_SPEC|C_WSNL,	0,
+	0,	C_WSNL,	0,	0,
 	0,	0,	0,	0,	0,	0,	0,	0,
 	0,	0,	0,	0,	0,	0,	0,	0,
 
-	0,	C_2,	C_SPEC,	0,	0,	0,	C_2,	C_SPEC,
+	C_WSNL,	C_2,	C_SPEC,	0,	0,	0,	C_2,	C_SPEC,
 	0,	0,	0,	C_2,	0,	C_2,	0,	C_SPEC|C_2,
 	C_I,	C_I,	C_I,	C_I,	C_I,	C_I,	C_I,	C_I,
 	C_I,	C_I,	0,	0,	C_2,	C_2,	C_2,	C_SPEC,
@@ -122,14 +117,55 @@ static const char spechr[256] = {
 
 };
 
+/*
+ * No-replacement array.  If a macro is found and exists in this array
+ * then no replacement shall occur.  This is a stack.
+ */
+struct symtab *norep[RECMAX];	/* Symbol table index table */
+int norepptr = 1;			/* Top of index table */
+unsigned short bptr[RECMAX];	/* currently active noexpand macro stack */
+int bidx;			/* Top of bptr stack */
+
 static void
 unch(int c)
 {
-
+		
 	--ifiles->curptr;
 	if (ifiles->curptr < ifiles->bbuf)
 		error("pushback buffer full");
-	*ifiles->curptr = (uchar)c;
+	*ifiles->curptr = (usch)c;
+}
+
+static int
+eatcmnt(void)
+{
+	int ch;
+
+	if (Cflag) { PUTCH('/'); PUTCH('*'); }
+	for (;;) {
+		ch = inch();
+		if (ch == '\n') {
+			ifiles->lineno++;
+			PUTCH('\n');
+		}
+		if (ch == -1)
+			return -1;
+		if (ch == '*') {
+			ch = inch();
+			if (ch == '/') {
+				if (Cflag) {
+					PUTCH('*');
+					PUTCH('/');
+				} else
+					PUTCH(' ');
+				break;
+			}
+			unch(ch);
+			ch = '*';
+		}
+		if (Cflag) PUTCH(ch);
+	}
+	return 0;
 }
 
 /*
@@ -146,51 +182,38 @@ static void
 fastscan(void)
 {
 	struct symtab *nl;
-	int ch, i;
+	int ch, i, ccnt/*, onemore*/;
+	usch *cp;
 
 	goto run;
 	for (;;) {
 		ch = NXTCH();
 xloop:		if (ch == -1)
 			return;
+		if (dflag>1)
+			printf("fastscan ch %d (%c)\n", ch, ch > 31 ? ch : '@');
 		if ((spechr[ch] & C_SPEC) == 0) {
 			PUTCH(ch);
 			continue;
 		}
 		switch (ch) {
+		case EBLOCK:
+		case WARN:
+		case CONC:
+			error("bad char passed");
+			break;
+
 		case '/': /* Comments */
 			if ((ch = inch()) == '/') {
-				if (Cflag) { PUTCH(ch); } else { PUTCH(' '); }
+cppcmt:				if (Cflag) { PUTCH(ch); } else { PUTCH(' '); }
 				do {
 					if (Cflag) PUTCH(ch);
 					ch = inch();
 				} while (ch != -1 && ch != '\n');
 				goto xloop;
 			} else if (ch == '*') {
-				if (Cflag) { PUTCH('/'); PUTCH('*'); }
-				for (;;) {
-					ch = inch();
-					if (ch == '\n') {
-						ifiles->lineno++;
-						PUTCH('\n');
-					}
-					if (ch == -1)
-						return;
-					if (ch == '*') {
-						ch = inch();
-						if (ch == '/') {
-							if (Cflag) {
-								PUTCH('*');
-								PUTCH('/');
-							} else
-								PUTCH(' ');
-							break;
-						}
-						unch(ch);
-						ch = '*';
-					}
-					if (Cflag) PUTCH(ch);
-				}
+				if (eatcmnt())
+					return;
 			} else {
 				PUTCH('/');
 				goto xloop;
@@ -213,11 +236,30 @@ xloop:		if (ch == -1)
 			goto xloop;
 
 		case '\n': /* newlines, for pp directives */
-			ifiles->lineno++;
+run2:			ifiles->lineno++;
 			do {
 				PUTCH(ch);
 run:				ch = NXTCH();
+				if (ch == '/') {
+					ch = NXTCH();
+					if (ch == '/')
+						goto cppcmt;
+					if (ch == '*') {
+						if (eatcmnt())
+							return;
+						goto run;
+					} 
+					unch(ch);
+					ch = '/';
+				}
 			} while (ch == ' ' || ch == '\t');
+			if (ch == '\\') {
+				ch = NXTCH();
+				if (ch == '\n')
+					goto run2;
+				unch(ch);
+				ch = '\\';
+			}
 			if (ch == '#') {
 				ppdir();
 				continue;
@@ -236,7 +278,7 @@ run:				ch = NXTCH();
 		case '\"': /* strings */
 str:			PUTCH(ch);
 			while ((ch = inch()) != '\"') {
-				PUTCH(ch);
+					PUTCH(ch);
 				if (ch == '\\') {
 					ch = inch();
 					PUTCH(ch);
@@ -257,7 +299,16 @@ str:			PUTCH(ch);
 		case '5': case '6': case '7': case '8': case '9':
 			do {
 				PUTCH(ch);
-				ch = NXTCH();
+nxt:				ch = NXTCH();
+				if (ch == '\\') {
+					ch = NXTCH();
+					if (ch == '\n') {
+						goto nxt;
+					} else {
+						unch(ch);
+						ch = '\\';
+					}
+				}
 				if (spechr[ch] & C_EP) {
 					PUTCH(ch);
 					ch = NXTCH();
@@ -305,9 +356,9 @@ con:			PUTCH(ch);
 					ch = NXTCH();
 				goto xloop;
 			}
-			i = 0;
+			/*onemore =*/ i = ccnt = 0;
 			do {
-				yytext[i++] = (uchar)ch;
+				yytext[i++] = (usch)ch;
 				ch = NXTCH();
 				if (ch == '\\') {
 					ch = NXTCH();
@@ -322,14 +373,17 @@ con:			PUTCH(ch);
 				if (ch < 0)
 					return;
 			} while (spechr[ch] & C_ID);
+
 			yytext[i] = 0;
 			unch(ch);
-			if ((nl = lookup((uchar *)yytext, FIND)) != 0) {
-				uchar *op = stringbuf;
-				putstr(gotident(nl));
-				stringbuf = op;
+
+			cp = stringbuf;
+			if ((nl = lookup((usch *)yytext, FIND)) && kfind(nl)) {
+				putstr(stringbuf);
 			} else
-				putstr((uchar *)yytext);
+				putstr((usch *)yytext);
+			stringbuf = cp;
+
 			break;
 		}
 	}
@@ -344,7 +398,7 @@ sloscan()
 zagain:
 	yyp = 0;
  	ch = inch();
-	yytext[yyp++] = (uchar)ch;
+	yytext[yyp++] = (usch)ch;
 	switch (ch) {
 	case -1:
 		return 0;
@@ -357,24 +411,24 @@ zagain:
 		yyp = 0;
 		break;
 
-	case '0': case '1': case '2': case '3': case '4': case '5':
+	case '0': case '1': case '2': case '3': case '4': case '5': 
 	case '6': case '7': case '8': case '9':
 		/* readin a "pp-number" */
 ppnum:		for (;;) {
 			ch = inch();
 			if (spechr[ch] & C_EP) {
-				yytext[yyp++] = (uchar)ch;
+				yytext[yyp++] = (usch)ch;
 				ch = inch();
 				if (ch == '-' || ch == '+') {
-					yytext[yyp++] = (uchar)ch;
+					yytext[yyp++] = (usch)ch;
 				} else
 					unch(ch);
 				continue;
 			}
 			if ((spechr[ch] & C_ID) || ch == '.') {
-				yytext[yyp++] = (uchar)ch;
+				yytext[yyp++] = (usch)ch;
 				continue;
-			}
+			} 
 			break;
 		}
 		unch(ch);
@@ -383,11 +437,11 @@ ppnum:		for (;;) {
 		return NUMBER;
 
 	case '\'':
-chlit:
+chlit:		
 		for (;;) {
 			if ((ch = inch()) == '\\') {
-				yytext[yyp++] = (uchar)ch;
-				yytext[yyp++] = (uchar)inch();
+				yytext[yyp++] = (usch)ch;
+				yytext[yyp++] = (usch)inch();
 				continue;
 			} else if (ch == '\n') {
 				/* not a constant */
@@ -396,7 +450,7 @@ chlit:
 				ch = '\'';
 				goto any;
 			} else
-				yytext[yyp++] = (uchar)ch;
+				yytext[yyp++] = (usch)ch;
 			if (ch == '\'')
 				break;
 		}
@@ -407,7 +461,7 @@ chlit:
 	case ' ':
 	case '\t':
 		while ((ch = inch()) == ' ' || ch == '\t')
-			yytext[yyp++] = (uchar)ch;
+			yytext[yyp++] = (usch)ch;
 		unch(ch);
 		yytext[yyp] = 0;
 		return(WSPACE);
@@ -415,7 +469,7 @@ chlit:
 	case '/':
 		if ((ch = inch()) == '/') {
 			do {
-				yytext[yyp++] = (uchar)ch;
+				yytext[yyp++] = (usch)ch;
 				ch = inch();
 			} while (ch && ch != '\n');
 			yytext[yyp] = 0;
@@ -435,7 +489,10 @@ chlit:
 		more:	while ((c = inch()) && c != '*') {
 				if (c == '\n')
 					putch(c), ifiles->lineno++;
-				else if (c == 1) /* WARN */
+				else if (c == EBLOCK) {
+					(void)inch();
+					(void)inch();
+				} else if (c == 1) /* WARN */
 					wrn = 1;
 			}
 			if (c == 0)
@@ -459,7 +516,7 @@ chlit:
 	case '.':
 		ch = inch();
 		if (isdigit(ch)) {
-			yytext[yyp++] = (uchar)ch;
+			yytext[yyp++] = (usch)ch;
 			goto ppnum;
 		} else {
 			unch(ch);
@@ -468,14 +525,16 @@ chlit:
 		goto any;
 
 	case '\"':
+		if (tflag)
+			goto any;
 	strng:
 		for (;;) {
 			if ((ch = inch()) == '\\') {
-				yytext[yyp++] = (uchar)ch;
-				yytext[yyp++] = (uchar)inch();
+				yytext[yyp++] = (usch)ch;
+				yytext[yyp++] = (usch)inch();
 				continue;
-			} else
-				yytext[yyp++] = (uchar)ch;
+			} else 
+				yytext[yyp++] = (usch)ch;
 			if (ch == '\"')
 				break;
 		}
@@ -483,26 +542,26 @@ chlit:
 		return(STRING);
 
 	case 'L':
-		if ((ch = inch()) == '\"') {
-			yytext[yyp++] = (uchar)ch;
+		if ((ch = inch()) == '\"' && !tflag) {
+			yytext[yyp++] = (usch)ch;
 			goto strng;
-		} else if (ch == '\'') {
-			yytext[yyp++] = (uchar)ch;
+		} else if (ch == '\'' && !tflag) {
+			yytext[yyp++] = (usch)ch;
 			goto chlit;
 		}
 		unch(ch);
 		/* FALLTHROUGH */
 
 	/* Yetch, all identifiers */
-	case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
-	case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
-	case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
-	case 's': case 't': case 'u': case 'v': case 'w': case 'x':
+	case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': 
+	case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': 
+	case 'm': case 'n': case 'o': case 'p': case 'q': case 'r': 
+	case 's': case 't': case 'u': case 'v': case 'w': case 'x': 
 	case 'y': case 'z':
-	case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+	case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': 
 	case 'G': case 'H': case 'I': case 'J': case 'K':
-	case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
-	case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
+	case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': 
+	case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': 
 	case 'Y': case 'Z':
 	case '_': /* {L}({L}|{D})* */
 
@@ -510,7 +569,7 @@ chlit:
 		for (;;) { /* get chars */
 			ch = inch();
 			if (isalpha(ch) || isdigit(ch) || ch == '_') {
-				yytext[yyp++] = (uchar)ch;
+				yytext[yyp++] = (usch)ch;
 			} else {
 				unch(ch);
 				break;
@@ -584,27 +643,31 @@ yylex()
 	case NUMBER:
 		if (yytext[0] == '\'') {
 			yylval.node.op = NUMBER;
-			yylval.node.nd_val = charcon((uchar *)yytext);
+			yylval.node.nd_val = charcon((usch *)yytext);
 		} else
 			cvtdig(yytext[0] != '0' ? 10 :
 			    yytext[1] == 'x' || yytext[1] == 'X' ? 16 : 8);
 		return NUMBER;
 
 	case IDENT:
-		if (strcmp(yytext, "defined") == 0) {
+		if (strcmp((char *)yytext, "defined") == 0) {
 			ifdef = 1;
 			return DEFINED;
 		}
-		nl = lookup((uchar *)yytext, FIND);
+		nl = lookup((usch *)yytext, FIND);
 		if (ifdef) {
 			yylval.node.nd_val = nl != NULL;
 			ifdef = 0;
 		} else if (nl && noex == 0) {
-			uchar *c, *och = stringbuf;
+			usch *och = stringbuf;
+			int i;
 
-			c = gotident(nl);
-			unch(1);
-			unpstr(c);
+			i = kfind(nl);
+			unch(WARN);
+			if (i)
+				unpstr(stringbuf);
+			else
+				unpstr(nl->namep);
 			stringbuf = och;
 			noex = 1;
 			return yylex();
@@ -613,7 +676,7 @@ yylex()
 		}
 		yylval.node.op = NUMBER;
 		return NUMBER;
-	case 1: /* WARN */
+	case WARN:
 		noex = 0;
 		return yylex();
 	default:
@@ -623,7 +686,7 @@ yylex()
 	return ch;
 }
 
-uchar *yyp, yybuf[CPPBUF];
+usch *yyp, yybuf[CPPBUF];
 
 int yywrap(void);
 
@@ -671,41 +734,6 @@ msdos:		if ((c = inpch()) == '\n') {
 	}
 }
 
-/*
- * Appends src to string dst of size siz (unlike strncat, siz is the
- * full size of dst, not space left).  At most siz-1 characters
- * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
- * Returns strlen(initial dst) + strlen(src); if retval >= siz,
- * truncation occurred.
- */
-size_t
-strlcat(char *dst, const char *src, size_t siz)
-{
-	char *d = dst;
-	const char *s = src;
-	size_t n = siz;
-	size_t dlen;
-
-	/* Find the end of dst and adjust bytes left but don't go past end */
-	while (n-- != 0 && *d != '\0')
-		d++;
-	dlen = d - dst;
-	n = siz - dlen;
-
-	if (n == 0)
-		return(dlen + strlen(s));
-	while (*s != '\0') {
-		if (n != 1) {
-			*d++ = *s;
-			n--;
-		}
-		s++;
-	}
-	*d = '\0';
-
-	return(dlen + (s - src));	/* count does not include NUL */
-}
-
 /*
  * Let the command-line args be faked defines at beginning of file.
  */
@@ -754,30 +782,29 @@ prinit(struct initar *it, struct includ *ic)
  * Return 0 on success, -1 if file to be included is not found.
  */
 int
-pushfile(const uchar *file, const uchar *fn, int idx, void *incs)
+pushfile(const usch *file, const usch *fn, int idx, void *incs)
 {
 	extern struct initar *initar;
+	struct includ ibuf;
 	struct includ *ic;
 	int otrulvl;
 
-	ic = malloc(sizeof(struct includ));
-        if (ic == NULL)
-                error("out of memory for %s", file);
+	ic = &ibuf;
 	ic->next = ifiles;
 
 	if (file != NULL) {
-	        ic->infil = open((const char *)file, O_RDONLY);
-		if (ic->infil < 0) {
-                        free(ic);
+		if ((ic->infil = open((const char *)file, O_RDONLY)) < 0)
 			return -1;
-                }
 		ic->orgfn = ic->fname = file;
 		if (++inclevel > MAX_INCLEVEL)
 			error("Limit for nested includes exceeded");
 	} else {
 		ic->infil = 0;
-		ic->orgfn = ic->fname = (const uchar *)"<stdin>";
+		ic->orgfn = ic->fname = (const usch *)"<stdin>";
 	}
+#ifndef BUF_STACK
+	ic->bbuf = malloc(BBUFSZ);
+#endif
 	ic->buffer = ic->bbuf+NAMEMAX;
 	ic->curptr = ic->buffer;
 	ifiles = ic;
@@ -794,8 +821,7 @@ pushfile(const uchar *file, const uchar *fn, int idx, void *incs)
 		prinit(initar, ic);
 		initar = NULL;
 		if (dMflag)
-			if (write(ofd, ic->buffer, strlen((char *)ic->buffer)) < 0)
-                            /* ignore */;
+			write(ofd, ic->buffer, strlen((char *)ic->buffer));
 		fastscan();
 		prtline();
 		ic->infil = oin;
@@ -808,9 +834,11 @@ pushfile(const uchar *file, const uchar *fn, int idx, void *incs)
 	if (otrulvl != trulvl || flslvl)
 		error("unterminated conditional");
 
+#ifndef BUF_STACK
+	free(ic->bbuf);
+#endif
 	ifiles = ic->next;
 	close(ic->infil);
-	free(ic);
 	inclevel--;
 	return 0;
 }
@@ -821,15 +849,14 @@ pushfile(const uchar *file, const uchar *fn, int idx, void *incs)
 void
 prtline()
 {
-	uchar *s, *os = stringbuf;
+	usch *s, *os = stringbuf;
 
 	if (Mflag) {
 		if (dMflag)
 			return; /* no output */
 		if (ifiles->lineno == 1) {
 			s = sheap("%s: %s\n", Mfile, ifiles->fname);
-			if (write(ofd, s, strlen((char *)s)) < 0)
-                            /* ignore */;
+			write(ofd, s, strlen((char *)s));
 		}
 	} else if (!Pflag)
 		putstr(sheap("\n# %d \"%s\"\n", ifiles->lineno, ifiles->fname));
@@ -840,8 +867,8 @@ void
 cunput(int c)
 {
 #ifdef CPP_DEBUG
-	extern int dflag;
-	if (dflag)printf(": '%c'(%d)", c > 31 ? c : ' ', c);
+//	extern int dflag;
+//	if (dflag)printf(": '%c'(%d)\n", c > 31 ? c : ' ', c);
 #endif
 #if 0
 if (c == 10) {
@@ -873,7 +900,7 @@ cvtdig(int rad)
 {
 	unsigned long long rv = 0;
 	unsigned long long rv2 = 0;
-	char *y = yytext;
+	usch *y = yytext;
 	int c;
 
 	c = *y++;
@@ -900,7 +927,7 @@ cvtdig(int rad)
 }
 
 static int
-charcon(uchar *p)
+charcon(usch *p)
 {
 	int val, c;
 
@@ -993,8 +1020,8 @@ skpln(void)
 }
 
 static void
-ifdefstmt(void)
-{
+ifdefstmt(void)		 
+{ 
 	int t;
 
 	if (flslvl) {
@@ -1006,7 +1033,7 @@ ifdefstmt(void)
 	while (t == WSPACE);
 	if (t != IDENT)
 		error("bad ifdef");
-	if (lookup((uchar *)yytext, FIND) == 0) {
+	if (lookup((usch *)yytext, FIND) == 0) {
 		putch('\n');
 		flslvl++;
 	} else
@@ -1015,8 +1042,8 @@ ifdefstmt(void)
 }
 
 static void
-ifndefstmt(void)
-{
+ifndefstmt(void)	  
+{ 
 	int t;
 
 	if (flslvl) {
@@ -1028,7 +1055,7 @@ ifndefstmt(void)
 	while (t == WSPACE);
 	if (t != IDENT)
 		error("bad ifndef");
-	if (lookup((uchar *)yytext, FIND) != 0) {
+	if (lookup((usch *)yytext, FIND) != 0) {
 		putch('\n');
 		flslvl++;
 	} else
@@ -1037,7 +1064,7 @@ ifndefstmt(void)
 }
 
 static void
-endifstmt(void)
+endifstmt(void)		 
 {
 	if (flslvl) {
 		flslvl--;
@@ -1094,11 +1121,11 @@ elifstmt(void)
 		error("If-less elif");
 }
 
-static uchar *
+static usch *
 svinp(void)
 {
 	int c;
-	uchar *cp = stringbuf;
+	usch *cp = stringbuf;
 
 	while ((c = inch()) && c != '\n')
 		savch(c);
@@ -1110,7 +1137,7 @@ svinp(void)
 static void
 cpperror(void)
 {
-	uchar *cp;
+	usch *cp;
 	int c;
 
 	if (flslvl)
@@ -1128,7 +1155,7 @@ cpperror(void)
 static void
 cppwarning(void)
 {
-	uchar *cp;
+	usch *cp;
 	int c;
 
 	if (flslvl)
@@ -1158,7 +1185,7 @@ undefstmt(void)
 
 	if (sloscan() != WSPACE || sloscan() != IDENT)
 		error("bad undef");
-	if (flslvl == 0 && (np = lookup((uchar *)yytext, FIND)))
+	if (flslvl == 0 && (np = lookup((usch *)yytext, FIND)))
 		np->value = 0;
 	chknl(0);
 }
@@ -1171,7 +1198,7 @@ pragmastmt(void)
 	if (sloscan() != WSPACE)
 		error("bad pragma");
 	if (!flslvl)
-		putstr((const uchar *)"#pragma ");
+		putstr((const usch *)"\n#pragma ");
 	do {
 		c = inch();
 		if (!flslvl)
@@ -1265,7 +1292,7 @@ ppdir(void)
 		goto out; /* something else, ignore */
 	i = 0;
 	do {
-		bp[i++] = (uchar)ch;
+		bp[i++] = (usch)ch;
 		if (i == sizeof(bp)-1)
 			goto out; /* too long */
 		ch = inch();

src/cmd/emg/.gitignore

@@ -0,0 +1 @@
+emg

src/cmd/emg/ChangeLog

@@ -0,0 +1,53 @@
+ChangeLog
+=========
+
+July 10, 2014 : emg 1.7
+-----------------------
+Searching now correctly updates line number display.
+Remove lots of rarely-used word functions.
+Remove search+replace: sed(1) is quicker.
+Reduce size of some static buffers.
+
+May 29, 2014 : emg 1.6
+----------------------
+emg is now part of the RetroBSD tree.
+Add PgUp and PgDn scrolling.
+
+March 16, 2014 : emg 1.5
+------------------------
+Add line number to the mode line.
+Implement prompted go to line function.
+Remove lesser used expensive movement functions.
+Documentation tweaks to reflect above changes.
+
+March 9, 2014 : emg 1.4
+-----------------------
+Huge whitespace cleanup.
+Make the window creation code mode consistent.
+Small documentation fix.
+
+March 8, 2014 : emg 1.3
+-----------------------
+Remove all OpenBSD support. emg is now for RetroBSD only.
+Remove tmux alternative keybindings.
+Revert Listbuffer command back to CTRL-x CTRL-b.
+
+December 2, 2013 : emg 1.2
+--------------------------
+Alternate keybindings for RetroBSD users using flow control terminal emulators.
+Alternate keybindings for tmux users who are using the default control command.
+
+October 24, 2013 : emg 1.1
+--------------------------
+Listbuffer command is now CTRL-x l (originally CTRL-x CTRL-b).
+	This is because the default command keybinding of tmux is CTRL-b.
+Search is now executed with <ENTER> instead of <ESC>.
+	<ESC> felt awkward, plus I don't search for newlines.
+Lots of code cleanups (ttyio.c).
+	Removal of unused #if blocks.
+	Use panic() everywhere.
+	Fix all warnings from gcc -Wall.
+
+October 19, 2013 : emg 1.0
+--------------------------
+Initial version of emg. Current targets are OpenBSD and RetroBSD.

src/cmd/emg/Makefile

@@ -0,0 +1,49 @@
+# emg Makefile
+# for RetroBSD
+
+TOPSRC =	$(shell cd ../../..; pwd)
+include $(TOPSRC)/target.mk
+
+# Some basic CFLAGS.
+CFLAGS =	-Os -Wall -Werror
+
+# With the extra LDFLAGS, save some bytes.
+CFLAGS +=	-ffunction-sections -fdata-sections
+
+# This reduces code size significantly.
+CFLAGS +=	-mips16
+
+# Set the screen size.
+# Will default to FORCE_COLS=80 and FORCE_ROWS=24
+# if not set here.
+#CFLAGS +=	-DFORCE_COLS=80 -DFORCE_ROWS=24
+
+# with CFLAGS+=	-ffunction-sections -fdata-sections
+LDFLAGS +=	-Wl,--gc-sections
+
+LIBS =		-ltermcap -lc
+
+MAN =		emg.0
+MANSRC =	emg.1
+
+OBJS =	basic.o buffer.o display.o file.o fileio.o line.o main.o \
+	random.o region.o search.o tcap.o ttyio.o window.o word.o
+
+all:	emg ${MAN}
+
+emg:	${OBJS}
+	${CC} ${LDFLAGS} -o emg.elf ${OBJS} ${LIBS}
+	${OBJDUMP} -S emg.elf > emg.dis
+	${SIZE} emg.elf
+	${ELF2AOUT} emg.elf $@ && rm emg.elf
+
+${MAN}:	${MANSRC}
+	${MANROFF} ${MANSRC} > ${MAN}
+
+install: all
+	install emg ${DESTDIR}/bin/emg
+	cp ${MAN} ${DESTDIR}/share/man/cat1/
+	cp -p emg.keys ${DESTDIR}/share/emg.keys
+
+clean:
+	rm -f *.o *~ *.core *.bak *.dis emg ${MAN}

src/cmd/emg/README

@@ -0,0 +1,41 @@
+emg
+===
+
+emg, or Ersatz Mg, is a very tiny Emacs-like text editor created by
+combining elements of Ersatz Emacs and Mg (both the mg1a release and the
+current OpenBSD-maintained version).
+
+The goal of this editor is to have something Emacs like for RetroBSD
+(a release of 2.11BSD for PIC32 microcontrollers). After noticing that the
+vi clone RetroBSD is using, VIrus, is GPL-licensed, I decided to provide
+a better-licensed editor. I also decided that, as a vi user myself, it would
+be easier to create an Emacs clone. Like you, I'm also unsure as to how that
+conclusion was reached.
+
+I had initially tried to port Mg to RetroBSD but it was simply too large.
+Ersatz Emacs does not build on RetroBSD, as RetroBSD is missing some functions
+that Ersatz Emacs requires. It made sense to try to take from each and create
+an editor that would work.
+
+In a way, emg has a double meaning: not only is it a combination of
+the two programs that comprise it, it is also a substitute Mg after my initial
+port failed.
+
+I have cleaned up some code where necessary; emg builds without errors on
+RetroBSD.
+
+Patches are also very welcome. I ask that you keep in mind the resource
+constraints of RetroBSD: everything must fit in 96K RAM. But of course,
+smaller is better.
+
+I've left Chris Baird's Ersatz Emacs README here so others can better
+appreciate the history of this software.
+
+As both Ersatz Emacs and Mg are Public Domain, emg is also Public Domain.
+
+Versions of emg up to and including 1.2 also supported OpenBSD; OpenBSD
+has since dropped the older headers, such as sgtty.h, and it is not worth
+reimplementing these for OpenBSD since OpenBSD maintains Mg.
+
+====================================
+Brian Callahan <bcallah@openbsd.org>

src/cmd/emg/README-ERSATZ

@@ -0,0 +1,39 @@
+This shar file contains the source to a microemacs-derived text editor
+that I have been personally hacking on for over a decade.
+
+Originally this was MicroEMACS 3.6 as released to mod.sources and the
+Public Domain by Daniel Lawrence in 1986, and was itself based on the
+work of Steve Wilhite and George Jones to MicroEMACS 2.0 (then also
+public domain) by Dave Conroy. I would like to reiterate Lawrence's
+thanks to them for writing such nice, well structured and documented
+code.
+
+"Ersatz-Emacs", as I call it today, is the above text editor throughly
+cleansed of routines and features that I personally never use. It is
+also an editor MINIX-creator Andy Tanenbaum could describe as "fitting
+inside a student's brain" (namely, mine).
+
+This source code should compile cleanly on any "modern" UN*X system
+with a termcap/curses library. This release has been tested with
+NetBSD and various Linux systems, although in the past when it was
+still mostly MicroEMACS, proto-Ersatz-Emacs was an editor of choice on
+SunOS, Solaris, Xenix, Minix/i386, and AIX. Supporting these and
+similar systems should not be difficult.
+
+I encourage people to personalise this very simple editor to their own
+requirements. Please send any useful bug reports and fixes back to me,
+but I'm not really interested in incorporating new features unless it
+simplifies the program further. Feel free to do a code-fork and
+distribute your own perfect text editor.
+
+The title "Ersatz" comes from the category Richard Stallman uses in
+MIT AI Memo 519a to describe those editors that are a surface-deep
+imitation (key bindings) of "real" ITS Emacs. If you are familiar with
+any Emacs-variant editor, you should have few problems with Ersatz.
+
+All source code of this program is in the Public Domain. I am a rabid
+Stallmanite weenie, but it would be improper to publish this under a
+different licence than it was given to me with.
+
+-- 
+Chris Baird,, <cjb@brushtail.apana.org.au>

src/cmd/emg/basic.c

@@ -0,0 +1,289 @@
+/* This file is in the public domain. */
+
+/*
+ * The routines in this file move the cursor around on the screen. They
+ * compute a new value for the cursor, then adjust ".". The display code
+ * always updates the cursor location, so only moves between lines, or
+ * functions that adjust the top line in the window and invalidate the
+ * framing, are hard.
+ */
+
+#include <stdlib.h>		/* atoi(3), ugh */
+#include "estruct.h"
+#include "edef.h"
+
+extern int getccol(int bflg);
+extern void mlwrite();
+extern int mlreplyt();
+
+int forwchar(int f, int n);
+int backchar(int f, int n);
+int forwline(int f, int n);
+int backline(int f, int n);
+int pagedown(int f, int n);
+int pageup(int f, int n);
+
+/*
+ * This routine, given a pointer to a LINE, and the current cursor goal
+ * column, return the best choice for the offset. The offset is returned.
+ * Used by "C-N" and "C-P".
+ */
+long getgoal(LINE *dlp)
+{
+  int col = 0;
+  int dbo = 0;
+  int newcol, c;
+
+  while (dbo != llength(dlp))
+    {
+      c = lgetc(dlp, dbo);
+      newcol = col;
+      if (c == '\t')
+	newcol |= 0x07;
+      else if (c < 0x20 || c == 0x7F)
+	++newcol;
+      ++newcol;
+      if (newcol > curgoal)
+	break;
+      col = newcol;
+      ++dbo;
+    }
+  return (dbo);
+}
+
+/*
+ * Move the cursor to the
+ * beginning of the current line.
+ * Trivial.
+ */
+/* ARGSUSED0 */
+int gotobol(int f, int n)
+{
+  curwp->w_doto = 0;
+  return (TRUE);
+}
+
+/*
+ * Move the cursor to the end of the current line. Trivial. No errors.
+ */
+/* ARGSUSED0 */
+int gotoeol(int f, int n)
+{
+  curwp->w_doto = llength(curwp->w_dotp);
+  return (TRUE);
+}
+
+/*
+ * Move the cursor backwards by "n" characters. If "n" is less than zero call
+ * "forwchar" to actually do the move. Otherwise compute the new cursor
+ * location. Error if you try and move out of the buffer. Set the flag if the
+ * line pointer for dot changes.
+ */
+int backchar(int f, int n)
+{
+  LINE *lp;
+
+  if (n < 0)
+    return (forwchar(f, -n));
+  while (n--)
+    {
+      if (curwp->w_doto == 0)
+	{
+	  if ((lp = lback(curwp->w_dotp)) == curbp->b_linep)
+	    return (FALSE);
+	  curwp->w_dotp = lp;
+	  curwp->w_doto = llength(lp);
+	  curwp->w_flag |= WFMOVE;
+	  curwp->w_dotline--;
+	}
+      else
+	curwp->w_doto--;
+    }
+  return (TRUE);
+}
+
+/*
+ * Move the cursor forwards by "n" characters. If "n" is less than zero call
+ * "backchar" to actually do the move. Otherwise compute the new cursor
+ * location, and move ".". Error if you try and move off the end of the
+ * buffer. Set the flag if the line pointer for dot changes.
+ */
+int forwchar(int f, int n)
+{
+  if (n < 0)
+    return (backchar(f, -n));
+  while (n--)
+    {
+      if (curwp->w_doto == llength(curwp->w_dotp))
+	{
+	  if (curwp->w_dotp == curbp->b_linep)
+	    return (FALSE);
+	  curwp->w_dotp = lforw(curwp->w_dotp);
+	  curwp->w_doto = 0;
+	  curwp->w_flag |= WFMOVE;
+	  curwp->w_dotline++;
+	}
+      else
+	curwp->w_doto++;
+    }
+  return (TRUE);
+}
+
+/*
+ * move to a particular line. argument (n) must be a positive integer for this
+ * to actually do anything
+ */
+int gotoline(int f, int n)
+{
+  if ((n < 1) || (n > curwp->w_bufp->b_lines))	/* if a bogus argument...then leave */
+    return (FALSE);				/* but we should never get here */
+
+  /* first, we go to the start of the buffer */
+  curwp->w_dotp = lforw(curbp->b_linep);
+  curwp->w_doto = 0;
+  curwp->w_dotline = 0;		/* and reset the line number */
+  return (forwline(f, n - 1));
+}
+
+/*
+ * Prompt for which line number we want to go to, then execute gotoline()
+ * with that number as its argument.
+ *
+ * Make sure the bounds are within the file.
+ *
+ * Bound to M-G
+ */
+int setline(int f, int n)
+{
+  char setl[6];
+  int l;
+
+  (void)mlreplyt("Go to line: ", setl, 6, 10);
+  l = atoi(setl);		/* XXX: This sucks! */
+
+  if (l < 1)
+    l = 1;
+  else if (l > curwp->w_bufp->b_lines)
+    l = curwp->w_bufp->b_lines;
+
+  gotoline(f, l);
+  return (TRUE);
+}
+
+/*
+ * Goto the beginning of the buffer. Massive adjustment of dot. This is
+ * considered to be hard motion; it really isn't if the original value of dot
+ * is the same as the new value of dot. Normally bound to "M-<".
+ */
+/* ARGSUSED0 */
+int gotobob(int f, int n)
+{
+  curwp->w_dotp = lforw(curbp->b_linep);
+  curwp->w_doto = 0;
+  curwp->w_flag |= WFHARD;
+  curwp->w_dotline = 0;
+  return (TRUE);
+}
+
+/*
+ * Move to the end of the buffer. Dot is always put at the end of the file
+ * (ZJ). The standard screen code does most of the hard parts of update.
+ * Bound to "M->".
+ */
+/* ARGSUSED0 */
+int gotoeob(int f, int n)
+{
+  curwp->w_dotp = curbp->b_linep;
+  curwp->w_doto = 0;
+  curwp->w_flag |= WFHARD;
+  curwp->w_dotline = curwp->w_bufp->b_lines;
+  return (TRUE);
+}
+
+/*
+ * Move forward by full lines. If the number of lines to move is less than
+ * zero, call the backward line function to actually do it. The last command
+ * controls how the goal column is set. Bound to "C-N". No errors are possible.
+ */
+int forwline(int f, int n)
+{
+  LINE *dlp;
+
+  if (n < 0)
+    return (backline(f, -n));
+  if ((lastflag & CFCPCN) == 0)/* Reset goal if last */
+    curgoal = getccol(FALSE); /* not C-P or C-N */
+  thisflag |= CFCPCN;
+  dlp = curwp->w_dotp;
+  while (n-- && dlp != curbp->b_linep)
+  {
+    dlp = lforw(dlp);
+    curwp->w_dotline++;
+  }
+  curwp->w_dotp = dlp;
+  curwp->w_doto = getgoal(dlp);
+  curwp->w_flag |= WFMOVE;
+  return (TRUE);
+}
+
+/*
+ * This function is like "forwline", but goes backwards. The scheme is exactly
+ * the same. Check for arguments that are less than zero and call your
+ * alternate. Figure out the new line and call "movedot" to perform the
+ * motion. No errors are possible. Bound to "C-P".
+ */
+int backline(int f, int n)
+{
+  LINE *dlp;
+
+  if (n < 0)
+    return (forwline(f, -n));
+  if ((lastflag & CFCPCN) == 0)/* Reset goal if the */
+    curgoal = getccol(FALSE); /* last isn't C-P, C-N */
+  thisflag |= CFCPCN;
+  dlp = curwp->w_dotp;
+  while (n-- && lback(dlp) != curbp->b_linep)
+  {
+    dlp = lback(dlp);
+    curwp->w_dotline--;
+  }
+  curwp->w_dotp = dlp;
+  curwp->w_doto = getgoal(dlp);
+  curwp->w_flag |= WFMOVE;
+  return (TRUE);
+}
+
+/*
+ * PgDn. Scroll down (FORCE_ROWS - 1).
+ * Just forwline(f, (FORCE_ROWS -1))
+ * Bound to C-V
+ */
+int pagedown(int f, int n)
+{
+  forwline(f, (FORCE_ROWS - 1));
+  return (TRUE);
+}
+
+/*
+ * PgUp. Scroll up (FORCE_ROWS - 1).
+ * Just backline(f, (FORCE_ROWS -1))
+ * Bound to M-V
+ */
+int pageup(int f, int n)
+{
+  backline(f, (FORCE_ROWS - 1));
+  return (TRUE);
+}
+
+/*
+ * Set the mark in the current window to the value of "." in the window. No
+ * errors are possible. Bound to "M-.".
+ */
+/* ARGSUSED0 */
+int setmark(int f, int n)
+{
+  curwp->w_markp = curwp->w_dotp;
+  curwp->w_marko = curwp->w_doto;
+  mlwrite("[Mark set]");
+  return (TRUE);
+}

src/cmd/emg/buffer.c

@@ -0,0 +1,494 @@
+/* This file is in the public domain. */
+
+/*
+ * Buffer management. Some of the functions are internal, and some are actually
+ * attached to user keys. Like everyone else, they set hints for the display
+ * system.
+ */
+
+#include <stdlib.h>		/* free(3), malloc(3) */
+#include <string.h>		/* strncpy(3) */
+#include "estruct.h"
+#include "edef.h"
+
+extern int mlreply(char *prompt, char *buf, int nbuf);
+extern int readin(char fname[]);
+extern void mlwrite();
+extern void mlerase();
+extern int mlyesno(char *prompt);
+extern void lfree(LINE *lp);
+extern WINDOW *wpopup();
+extern LINE *lalloc();
+
+int swbuffer(BUFFER *bp);
+int usebuffer(int f, int n);
+int nextbuffer(int f, int n);
+int killbuffer(int f, int n);
+int zotbuf(BUFFER *bp);
+int namebuffer(int f, int n);
+int listbuffers(int f, int n);
+int makelist();
+void itoa(char buf[], int width, int num);
+int addline(char *text);
+int anycb();
+BUFFER* bfind(char *bname, int cflag, int bflag);
+int bclear(BUFFER *bp);
+
+/*
+ * make buffer BP current
+ */
+int swbuffer(BUFFER *bp)
+{
+  WINDOW *wp;
+
+  if (--curbp->b_nwnd == 0)
+    {				/* Last use. */
+      curbp->b_dotp = curwp->w_dotp;
+      curbp->b_doto = curwp->w_doto;
+      curbp->b_markp = curwp->w_markp;
+      curbp->b_marko = curwp->w_marko;
+    }
+  curbp = bp;			/* Switch. */
+  if (curbp->b_active != TRUE)
+    {				/* buffer not active yet */
+      /* read it in and activate it */
+      readin(curbp->b_fname);
+      curbp->b_dotp = lforw(curbp->b_linep);
+      curbp->b_doto = 0;
+      curbp->b_active = TRUE;
+    }
+  curwp->w_bufp = bp;
+  curwp->w_linep = bp->b_linep;	/* For macros, ignored */
+  curwp->w_flag |= WFMODE | WFFORCE | WFHARD; /* Quite nasty */
+  if (bp->b_nwnd++ == 0)
+    {				/* First use */
+      curwp->w_dotp = bp->b_dotp;
+      curwp->w_doto = bp->b_doto;
+      curwp->w_markp = bp->b_markp;
+      curwp->w_marko = bp->b_marko;
+      return (TRUE);
+    }
+  wp = wheadp;			/* Look for old */
+  while (wp != 0)
+    {
+      if (wp != curwp && wp->w_bufp == bp)
+	{
+	  curwp->w_dotp = wp->w_dotp;
+	  curwp->w_doto = wp->w_doto;
+	  curwp->w_markp = wp->w_markp;
+	  curwp->w_marko = wp->w_marko;
+	  break;
+	}
+      wp = wp->w_wndp;
+    }
+  return (TRUE);
+}
+
+/*
+ * Attach a buffer to a window. The values of dot and mark come from the buffer
+ * if the use count is 0. Otherwise, they come from some other window.
+ */
+/* ARGSUSED0 */
+int usebuffer(int f, int n)
+{
+  BUFFER *bp;
+  char bufn[NBUFN];
+  int s;
+
+  if ((s = mlreply("Use buffer: ", bufn, NBUFN)) != TRUE)
+    return (s);
+  if ((bp = bfind(bufn, TRUE, 0)) == NULL)
+    return (FALSE);
+  return (swbuffer(bp));
+}
+
+/* switch to the next buffer in the buffer list
+ */
+/* ARGSUSED0 */
+int nextbuffer(int f, int n)
+{
+  BUFFER *bp;
+
+  bp = curbp->b_bufp;
+  /* cycle through the buffers to find an eligable one */
+  while ((bp == NULL) || (bp->b_flag & BFTEMP))
+    {
+      if (bp == NULL)
+	bp = bheadp;
+      else
+	bp = bp->b_bufp;
+    }
+  return (swbuffer(bp));
+}
+
+/*
+ * Dispose of a buffer, by name. Ask for the name. Look it up (don't get too
+ * upset if it isn't there at all!). Get quite upset if the buffer is being
+ * displayed. Clear the buffer (ask if the buffer has been changed). Then free
+ * the header line and the buffer header. Bound to "C-X K".
+ */
+/* ARGSUSED0 */
+int killbuffer(int f, int n)
+{
+  BUFFER *bp;
+  char bufn[NBUFN];
+  int s;
+
+  if ((s = mlreply("Kill buffer: ", bufn, NBUFN)) != TRUE)
+    return (s);
+  if ((bp = bfind(bufn, FALSE, 0)) == NULL) /* Easy if unknown */
+    return (TRUE);
+  return (zotbuf(bp));
+}
+
+/* kill the buffer pointed to by bp */
+int zotbuf(BUFFER *bp)
+{
+  BUFFER *bp1, *bp2;
+  int s;
+
+  if (bp->b_nwnd != 0)
+    {				/* Error if on screen */
+      mlwrite("Buffer is being displayed");
+      return (FALSE);
+    }
+  if ((s = bclear(bp)) != TRUE) /* Blow text away */
+    return (s);
+  free (bp->b_linep);		/* Release header line */
+  bp1 = 0;			/* Find the header */
+  bp2 = bheadp;
+  while (bp2 != bp)
+    {
+      bp1 = bp2;
+      bp2 = bp2->b_bufp;
+    }
+  bp2 = bp2->b_bufp;		/* Next one in chain */
+  if (bp1 == NULL)		/* Unlink it */
+    bheadp = bp2;
+  else
+    bp1->b_bufp = bp2;
+  free(bp);			/* Release buffer block */
+  return (TRUE);
+}
+
+/* Rename the current buffer */
+/* ARGSUSED0 */
+int namebuffer(int f, int n)
+{
+  BUFFER *bp;			/* pointer to scan through all buffers */
+  char bufn[NBUFN];		/* buffer to hold buffer name */
+
+  /* prompt for and get the new buffer name */
+ ask:
+  if (mlreply("Change buffer name to: ", bufn, NBUFN) != TRUE)
+    return (FALSE);
+
+  /* and check for duplicates */
+  bp = bheadp;
+  while (bp != 0)
+    {
+      if (bp != curbp)
+	{
+	  /* if the names the same */
+	  if (strcmp(bufn, bp->b_bname) == 0)
+	    goto ask;		/* try again */
+	}
+      bp = bp->b_bufp;		/* onward */
+    }
+
+  strncpy(curbp->b_bname, bufn, NBUFN); /* copy buffer name to structure */
+  curwp->w_flag |= WFMODE;		 /* make mode line replot */
+  mlerase();
+  return (TRUE);
+}
+
+/*
+ * List all of the active buffers. First update the special buffer that holds
+ * the list. Next make sure at least 1 window is displaying the buffer list,
+ * splitting the screen if this is what it takes. Lastly, repaint all of the
+ * windows that are displaying the list. Bound to "C-X C-B".
+ */
+/* ARGSUSED0 */
+int listbuffers(int f, int n)
+{
+  WINDOW *wp;
+  BUFFER *bp;
+  int s;
+
+  if ((s = makelist()) != TRUE)
+    return (s);
+  if (blistp->b_nwnd == 0)
+    {				/* Not on screen yet */
+      if ((wp = wpopup()) == NULL)
+	return (FALSE);
+      bp = wp->w_bufp;
+      if (--bp->b_nwnd == 0)
+	{
+	  bp->b_dotp = wp->w_dotp;
+	  bp->b_doto = wp->w_doto;
+	  bp->b_markp = wp->w_markp;
+	  bp->b_marko = wp->w_marko;
+	}
+      wp->w_bufp = blistp;
+      ++blistp->b_nwnd;
+    }
+  wp = wheadp;
+  while (wp != 0)
+    {
+      if (wp->w_bufp == blistp)
+	{
+	  wp->w_linep = lforw(blistp->b_linep);
+	  wp->w_dotp = lforw(blistp->b_linep);
+	  wp->w_doto = 0;
+	  wp->w_markp = 0;
+	  wp->w_marko = 0;
+	  wp->w_flag |= WFMODE | WFHARD;
+	}
+      wp = wp->w_wndp;
+    }
+  return (TRUE);
+}
+
+/*
+ * This routine rebuilds the text in the special secret buffer that holds the
+ * buffer list. It is called by the list buffers command. Return TRUE if
+ * everything works. Return FALSE if there is an error (if there is no
+ * memory).
+ */
+int makelist()
+{
+  BUFFER *bp;
+  LINE *lp;
+  char *cp1, *cp2;
+  char b[7], line[128];
+  int nbytes, s, c;
+
+  blistp->b_flag &= ~BFCHG;	/* Don't complain! */
+  if ((s = bclear(blistp)) != TRUE) /* Blow old text away */
+    return (s);
+  strncpy (blistp->b_fname, "", 1);
+  if (addline("AC    Size Buffer	  File") == FALSE ||
+      addline("-- ------- ------	  ----") == FALSE)
+    return (FALSE);
+  bp = bheadp;
+
+  /* build line to report global mode settings */
+  cp1 = &line[0];
+  *cp1++ = ' ';
+  *cp1++ = ' ';
+  *cp1++ = ' ';
+
+  /* output the list of buffers */
+  while (bp != 0)
+    {
+      if ((bp->b_flag & BFTEMP) != 0)
+	{				/* Skip magic ones */
+	  bp = bp->b_bufp;
+	  continue;
+	}
+      cp1 = &line[0];		/* Start at left edge */
+
+      /* output status of ACTIVE flag (has the file been read in? */
+      if (bp->b_active == TRUE)	 /* "@" if activated */
+	*cp1++ = '@';
+      else
+	*cp1++ = ' ';
+
+      /* output status of changed flag */
+      if ((bp->b_flag & BFCHG) != 0) /* "*" if changed */
+	*cp1++ = '*';
+      else
+	*cp1++ = ' ';
+      *cp1++ = ' ';		/* Gap */
+
+      nbytes = 0;			/* Count bytes in buf */
+      lp = lforw(bp->b_linep);
+      while (lp != bp->b_linep)
+	{
+	  nbytes += llength(lp) + 1;
+	  lp = lforw(lp);
+	}
+      itoa(b, 6, nbytes);	/* 6 digit buffer size */
+      cp2 = &b[0];
+      while ((c = *cp2++) != 0)
+	*cp1++ = (char)c;
+      *cp1++ = ' ';		/* Gap */
+      cp2 = &bp->b_bname[0];	/* Buffer name */
+      while ((c = *cp2++) != 0)
+	*cp1++ = (char)c;
+      cp2 = &bp->b_fname[0];	/* File name */
+      if (*cp2 != 0)
+	{
+	  while (cp1 < &line[2 + 1 + 5 + 1 + 6 + 1 + NBUFN]) /* XXX ??? */
+	    *cp1++ = ' ';
+	  while ((c = *cp2++) != 0)
+	    {
+	      if (cp1 < &line[128 - 1])
+		*cp1++ = (char)c;
+	    }
+	}
+      *cp1 = 0;			/* Add to the buffer */
+      if (addline(line) == FALSE)
+	return (FALSE);
+      bp = bp->b_bufp;
+    }
+  return (TRUE);		/* All done */
+}
+
+void itoa(char buf[], int width, int num)
+{
+  buf[width] = 0;		/* End of string */
+  while (num >= 10)
+    {				/* Conditional digits */
+      buf[--width] = (char)((num % 10) + '0');
+      num /= 10;
+    }
+  buf[--width] = (char)(num + '0'); /* Always 1 digit */
+  while (width != 0)		    /* Pad with blanks */
+    buf[--width] = ' ';
+}
+
+/*
+ * The argument "text" points to a string. Append this line to the buffer list
+ * buffer. Handcraft the EOL on the end. Return TRUE if it worked and FALSE if
+ * you ran out of room.
+ */
+int addline(char *text)
+{
+  LINE *lp;
+  int ntext, i;
+
+  ntext = strlen(text);
+  if ((lp = lalloc(ntext)) == NULL)
+    return (FALSE);
+  for (i = 0; i < ntext; ++i)
+    lputc(lp, i, text[i]);
+  blistp->b_linep->l_bp->l_fp = lp; /* Hook onto the end */
+  lp->l_bp = blistp->b_linep->l_bp;
+  blistp->b_linep->l_bp = lp;
+  lp->l_fp = blistp->b_linep;
+  if (blistp->b_dotp == blistp->b_linep) /* If "." is at the end */
+    blistp->b_dotp = lp;	/* move it to new line */
+  return (TRUE);
+}
+
+/*
+ * Look through the list of buffers. Return TRUE if there are any changed
+ * buffers. Buffers that hold magic internal stuff are not considered; who
+ * cares if the list of buffer names is hacked. Return FALSE if no buffers
+ * have been changed.
+ */
+int anycb()
+{
+  BUFFER *bp;
+
+  bp = bheadp;
+  while (bp != NULL)
+    {
+      if ((bp->b_flag & BFTEMP) == 0 && (bp->b_flag & BFCHG) != 0)
+	return (TRUE);
+      bp = bp->b_bufp;
+    }
+  return (FALSE);
+}
+
+/*
+ * Find a buffer, by name. Return a pointer to the BUFFER structure associated
+ * with it. If the named buffer is found, but is a TEMP buffer (like the
+ * buffer list) conplain. If the buffer is not found and the "cflag" is TRUE,
+ * create it. The "bflag" is the settings for the flags in in buffer.
+ */
+BUFFER* bfind(char *bname, int cflag, int bflag)
+{
+  BUFFER *bp, *sb;
+  LINE *lp;
+
+  bp = bheadp;
+  while (bp != 0)
+    {
+      if (strcmp(bname, bp->b_bname) == 0)
+	{
+	  if ((bp->b_flag & BFTEMP) != 0)
+	    {
+	      mlwrite ("Cannot select builtin buffer");
+	      return (0);
+	    }
+	  return (bp);
+	}
+      bp = bp->b_bufp;
+    }
+  if (cflag != FALSE)
+    {
+      if ((bp = (BUFFER *) malloc(sizeof(BUFFER))) == NULL)
+	return (0);
+      if ((lp = lalloc(0)) == NULL)
+	{
+	  free(bp);
+	  return (BUFFER*)0;
+	}
+      /* find the place in the list to insert this buffer */
+      if (bheadp == NULL || strcmp(bheadp->b_bname, bname) > 0)
+	{
+	  /* insert at the begining */
+	  bp->b_bufp = bheadp;
+	  bheadp = bp;
+	}
+      else
+	{
+	  sb = bheadp;
+	  while (sb->b_bufp != 0)
+	    {
+	      if (strcmp(sb->b_bufp->b_bname, bname) > 0)
+		break;
+	      sb = sb->b_bufp;
+	    }
+
+	  /* and insert it */
+	  bp->b_bufp = sb->b_bufp;
+	  sb->b_bufp = bp;
+	}
+
+      /* and set up the other buffer fields */
+      bp->b_active = TRUE;
+      bp->b_dotp = lp;
+      bp->b_doto = 0;
+      bp->b_markp = 0;
+      bp->b_marko = 0;
+      bp->b_flag = (char)bflag;
+      bp->b_nwnd = 0;
+      bp->b_linep = lp;
+      bp->b_lines = 1;
+      strncpy(bp->b_fname, "", 1);
+      strncpy(bp->b_bname, bname, NBUFN);
+      lp->l_fp = lp;
+      lp->l_bp = lp;
+    }
+  return (bp);
+}
+
+/*
+ * This routine blows away all of the text in a buffer. If the buffer is
+ * marked as changed then we ask if it is ok to blow it away; this is to save
+ * the user the grief of losing text. The window chain is nearly always wrong
+ * if this gets called; the caller must arrange for the updates that are
+ * required. Return TRUE if everything looks good.
+ */
+int bclear(BUFFER *bp)
+{
+  LINE *lp;
+  int s;
+
+  if ((bp->b_flag & BFTEMP) == 0 /* Not scratch buffer */
+      && (bp->b_flag & BFCHG) != 0 /* Something changed */
+      && (s = mlyesno("Discard changes")) != TRUE)
+    return (s);
+  bp->b_flag &= ~BFCHG;		/* Not changed */
+  while ((lp = lforw(bp->b_linep)) != bp->b_linep)
+    lfree(lp);
+  bp->b_dotp = bp->b_linep;	/* Fix "." */
+  bp->b_doto = 0;
+  bp->b_markp = 0;		/* Invalidate "mark" */
+  bp->b_marko = 0;
+  bp->b_lines = 1;
+  return (TRUE);
+}

src/cmd/emg/ebind.h

@@ -0,0 +1,67 @@
+/* This file is in the public domain. */
+
+/*
+ * This table is *roughly* in ASCII order, left to right across the
+ * characters of the command. This expains the funny location of the
+ * control-X commands.
+ */
+
+KEYTAB keytab[] = {
+  {CTRL | 'A', gotobol},
+  {CTRL | 'B', backchar},
+  {CTRL | 'D', forwdel},
+  {CTRL | 'E', gotoeol},
+  {CTRL | 'F', forwchar},
+  {CTRL | 'G', ctrlg},
+  {CTRL | 'H', backdel},
+  {CTRL | 'I', tab},
+  {CTRL | 'K', killtext},
+  {CTRL | 'L', refresh},
+  {CTRL | 'M', newline},
+  {CTRL | 'N', forwline},
+  {CTRL | 'O', openline},
+  {CTRL | 'P', backline},
+  {CTRL | 'Q', quote},
+  {CTRL | 'R', backsearch},
+  {CTRL | 'S', forwsearch},
+  {CTRL | 'T', twiddle},
+  {CTRL | 'V', pagedown},
+  {CTRL | 'W', killregion},
+  {CTRL | 'Y', yank},
+  {CTLX | '(', ctlxlp},
+  {CTLX | ')', ctlxrp},
+  {CTLX | '1', onlywind},
+  {CTLX | '2', splitwind},
+  {CTLX | 'B', usebuffer},
+  {CTLX | 'E', ctlxe},
+  {CTLX | 'F', setfillcol},
+  {CTLX | 'K', killbuffer},
+  {CTLX | 'N', filename},
+  {CTLX | 'O', nextwind},
+  {CTLX | 'S', filesave},		/* non-standard */
+  {CTLX | 'Q', quote},			/* non-standard */
+  {CTLX | 'X', nextbuffer},
+  {CTLX | '^', enlargewind},
+  {CTLX | CTRL | 'B', listbuffers},
+  {CTLX | CTRL | 'C', quit},
+  {CTLX | CTRL | 'F', filefind},
+  {CTLX | CTRL | 'I', insfile},
+  {CTLX | CTRL | 'R', fileread},
+  {CTLX | CTRL | 'S', filesave},
+  {CTLX | CTRL | 'W', filewrite},
+  {META | '.', setmark},
+  {META | '<', gotobob},
+  {META | '>', gotoeob},
+  {META | 'B', backword},
+  {META | 'F', forwword},
+  {META | 'G', setline},		/* non-standard */
+  {META | 'S', forwsearch},		/* non-standard */
+  {META | 'V', pageup},
+  {META | 'W', copyregion},
+  {META | 'Z', quickexit},
+  {META | CTRL | 'N', namebuffer},
+  {0x7F, backdel},
+  {META | '[', extendedcmd},
+  {META | 'O', extendedcmd},
+  {0, 0}
+};

src/cmd/emg/edef.h

@@ -0,0 +1,78 @@
+/* This file is in the public domain. */
+
+#ifndef NULL
+#define NULL ((void*)0)
+#endif
+
+#ifdef	maindef
+/*
+ * for MAIN.C
+ * initialized global definitions
+ */
+
+short kbdm[NKBDM] = {CTLX | ')'}; /* Macro */
+int fillcol = 72;		/* Current fill column */
+char pat[NPAT];			/* Search pattern */
+char rpat[NPAT];		/* replacement pattern */
+int revexist = FALSE;
+int eolexist = TRUE;		/* does clear to EOL exist */
+int sgarbf = TRUE;		/* TRUE if screen is garbage */
+int mpresf = FALSE;		/* TRUE if message in last line */
+
+/* uninitialized global definitions */
+
+int currow;			/* Cursor row */
+int curcol;			/* Cursor column */
+int thisflag;			/* Flags, this command */
+int lastflag;			/* Flags, last command */
+int curgoal;			/* Goal for C-P, C-N */
+WINDOW *curwp;			/* Current window */
+BUFFER *curbp;			/* Current buffer */
+WINDOW *wheadp;			/* Head of list of windows */
+BUFFER *bheadp;			/* Head of list of buffers */
+BUFFER *blistp;			/* Buffer for C-X C-B */
+short *kbdmip;			/* Input pointer for above */
+short *kbdmop;			/* Output pointer for above */
+
+#else
+/*
+ * for all the other .C files
+ * initialized global external declarations
+ */
+
+extern int fillcol;		/* Fill column */
+extern short kbdm[];		/* Holds kayboard macro data */
+extern char pat[];		/* Search pattern */
+extern char rpat[];		/* Replacement pattern */
+extern int eolexist;		/* does clear to EOL exist? */
+extern int revexist;		/* does reverse video exist? */
+extern char *modename[];	/* text names of modes */
+extern char modecode[];		/* letters to represent modes */
+extern KEYTAB keytab[];		/* key bind to functions table */
+extern int gmode;		/* global editor mode */
+extern int sgarbf;		/* State of screen unknown */
+extern int mpresf;		/* Stuff in message line */
+extern int clexec;		/* command line execution flag */
+
+/* initialized global external declarations */
+
+extern int currow;		/* Cursor row */
+extern int curcol;		/* Cursor column */
+extern int thisflag;		/* Flags, this command */
+extern int lastflag;		/* Flags, last command */
+extern int curgoal;		/* Goal for C-P, C-N */
+extern WINDOW *curwp;		/* Current window */
+extern BUFFER *curbp;		/* Current buffer */
+extern WINDOW *wheadp;		/* Head of list of windows */
+extern BUFFER *bheadp;		/* Head of list of buffers */
+extern BUFFER *blistp;		/* Buffer for C-X C-B */
+extern short *kbdmip;		/* Input pointer for above */
+extern short *kbdmop;		/* Output pointer for above */
+
+#endif
+
+/* terminal table defined only in TERM.C */
+
+#ifndef	termdef
+extern TERM term;		/* Terminal information */
+#endif

src/cmd/emg/efunc.h

@@ -0,0 +1,65 @@
+/* This file is in the public domain. */
+
+/* EFUNC.H: function declarations and names
+ *
+ * This file list all the C code functions used. To add functions, declare it
+ * here in both the extern function list and the name binding table
+ */
+
+extern int ctrlg();	       /* Abort out of things */
+extern int quit();	       /* Quit */
+extern int ctlxlp();	       /* Begin macro */
+extern int ctlxrp();	       /* End macro */
+extern int ctlxe();	       /* Execute macro */
+extern int fileread();	       /* Get a file, read only */
+extern int filefind();	       /* Get a file, read write */
+extern int filewrite();        /* Write a file */
+extern int filesave();	       /* Save current file */
+extern int filename();	       /* Adjust file name */
+extern int getccol();	       /* Get current column */
+extern int gotobol();	       /* Move to start of line */
+extern int forwchar();	       /* Move forward by characters */
+extern int gotoeol();	       /* Move to end of line */
+extern int backchar();	       /* Move backward by characters */
+extern int forwline();	       /* Move forward by lines */
+extern int backline();	       /* Move backward by lines */
+extern int pagedown();	       /* PgDn */
+extern int pageup();	       /* PgUp */
+extern int gotobob();	       /* Move to start of buffer */
+extern int gotoeob();	       /* Move to end of buffer */
+extern int setfillcol();       /* Set fill column */
+extern int setmark();	       /* Set mark */
+extern int forwsearch();       /* Search forward */
+extern int backsearch();       /* Search backwards */
+extern int nextwind();	       /* Move to the next window */
+extern int prevwind();	       /* Move to the previous window */
+extern int onlywind();	       /* Make current window only one */
+extern int splitwind();        /* Split current window */
+extern int enlargewind();      /* Enlarge display window */
+extern int shrinkwind();       /* Shrink window */
+extern int listbuffers();      /* Display list of buffers */
+extern int usebuffer();        /* Switch a window to a buffer */
+extern int killbuffer();       /* Make a buffer go away */
+extern int refresh();	       /* Refresh the screen */
+extern int twiddle();	       /* Twiddle characters */
+extern int tab();	       /* Insert tab */
+extern int newline();	       /* Insert CR-LF */
+extern int openline();	       /* Open up a blank line */
+extern int quote();	       /* Insert literal */
+extern int backword();	       /* Backup by words */
+extern int forwword();	       /* Advance by words */
+extern int forwdel();	       /* Forward delete */
+extern int backdel();	       /* Backward delete */
+extern int killtext();	       /* Kill forward */
+extern int yank();	       /* Yank back from killbuffer */
+extern int killregion();       /* Kill region */
+extern int copyregion();       /* Copy region to kill buffer */
+extern int quickexit();        /* low keystroke style exit */
+extern int setline();	       /* go to a numbered line */
+extern int namebuffer();       /* rename the current buffer */
+extern int deskey();	       /* describe a key's binding */
+extern int insfile();	       /* insert a file */
+extern int nextbuffer();       /* switch to the next buffer */
+extern int forwhunt();	       /* hunt forward for next match */
+extern int backhunt();	       /* hunt backwards for next match */
+extern int extendedcmd();      /* parse ANSI/VT100 extended keys  */

src/cmd/emg/emg.1

@@ -0,0 +1,62 @@
+.\" This file is in the public domain.
+.\"
+.\" Basic emg man page.
+.\" As both Ersatz Emacs and Mg are Public Domain, emg is also Public Domain.
+.\"
+.Dd June 17, 2014
+.Os
+.Dt EMG 1
+.Sh NAME
+.Nm emg
+.Nd very small Emacs-like text editor
+.Sh SYNOPSIS
+.Nm emg
+.Op Ar
+.Sh DESCRIPTION
+.Nm ,
+or Ersatz Mg, is an Emacs-like text editor designed for RetroBSD
+and other memory-constrained environments.
+.Nm
+was originally created to fit into an operating environment of 96K of RAM,
+and one in which Mg did not fit and Ersatz Emacs did not build.
+By combining parts of each a working editor was created.
+.Pp
+When invoked without file arguments,
+.Nm
+creates a
+.Qq main
+buffer.
+This buffer must be renamed
+.Ic ( C-x n )
+in order to be saved
+.Ic ( C-x C-s ) .
+.Pp
+As both Ersatz Emacs and Mg are Public Domain, 
+.Nm
+is also Public Domain.
+.Sh FILES
+There is a chart of key bindings in
+.Pa /usr/local/share/doc/emg/emg.keys .
+Consulting this file is a must.
+While
+.Nm
+strives to maintain compatibility with larger Emacs implementations,
+there may be features intentionally left unimplemented in order to keep
+.Nm
+as small as possible.
+.Sh AUTHORS
+.Nm
+is a combination of Ersatz Emacs and Mg and therefore all authors
+for both deserve credit.
+Ersatz Emacs and Mg were combined by
+.An Brian Callahan Aq Mt bcallah@openbsd.org
+to create
+.Nm .
+.Sh BUGS
+None known.
+However, patches are appreciated if any are found.
+.Sh TODO
+It would be nice to have automatic window resizing.
+It would also be nice if
+.Nm
+could clear the screen when quit, like Mg does.

src/cmd/emg/emg.keys

@@ -0,0 +1,131 @@
+		      emg keybindings (July 7, 2014)
+		    Based on Ersatz Emacs (2000/09/14)
+
+M-  means to use the <ESC> key prior to using another key
+^A  means to use the control key at the same time as the 'A' key
+
+------------------------------------------------------------------------------
+			  MOVING THE CURSOR
+
+^F   Forward character   		M-F    Forward word
+^B   Backward character			M-B    Backward word
+^N   Next line				M-P    Front of paragraph
+^P   Previous line			M-N    End of paragraph
+^A   Front of line			M-< or [HOME] Start of file
+^E   End of line			M-> or [END] End of file
+^V or [PgDn] Scroll down		M-V or [PgUp] Scroll up
+M-G  Go to line				Arrow keys are active
+
+------------------------------------------------------------------------------
+			 DELETING & INSERTING
+
+<-   Delete previous character	        M-<-   Delete previous word
+^D   Delete next character		M-D    Delete next word
+^K   Delete to end of line		^O     Insert line
+
+------------------------------------------------------------------------------
+		       FORMATTING & TRANSPOSING
+
+^Q   Quote next key, so that control codes may be entered into text. (or ^X Q)
+
+------------------------------------------------------------------------------
+			      SEARCHING
+
+^S   Search forward from cursor position. Type in a string and end it with
+     ENTER. Either case matches. (or M-S)
+^R   As above, but reverse search from cursor position.
+
+------------------------------------------------------------------------------
+			  COPYING AND MOVING
+
+M-.   Set mark at current position.
+^W   Delete region.
+M-W  Copy region to kill buffer.
+^Y   Yank back kill buffer at cursor.
+
+A region is defined as the area between this mark and the current cursor
+position. The kill buffer is the text which has been most recently deleted or
+copied.
+
+Generally, the procedure for copying or moving text is:
+1) Mark out region using M-. at the beginning and move the cursor to
+   the end.
+2) Delete it (with ^W) or copy it (with M-W) into the kill buffer.
+3) Move the cursor to the desired location and yank it back (with ^Y).
+
+------------------------------------------------------------------------------
+			   MULTIPLE BUFFERS
+
+A buffer contains a COPY of a document being edited, and must be saved for
+changes to be kept. Many buffers may be activated at once.
+
+^X B  Switch to another buffer.
+^X ^B Show buffer directory in a window (^X 1 to remove).
+^X K  Delete a non-displayed buffer.
+^X X  Switch to next buffer in buffer list.
+^X N  Change the filename associated with the buffer.
+M-^N  Change the name of the buffer.
+
+------------------------------------------------------------------------------
+			  READING FROM DISK
+
+^X^F  Find file; read into a new buffer created from filename.
+      (This is the usual way to edit a new file.)
+^X^R  Read file into current buffer, erasing its previous contents.
+      No new buffer will be created.
+^X^I  Insert file into current buffer at cursor's location.
+
+------------------------------------------------------------------------------
+			    SAVING TO DISK
+
+^X^S  Save current buffer to disk, using the buffer's filename as the name of
+      the disk file. Any disk file of that name will be overwritten. (or ^X S)
+^X^W  Write current buffer to disk. Type in a new filename at the prompt to
+      write to; it will also become the current buffer's filename.
+
+------------------------------------------------------------------------------
+			   MULTIPLE WINDOWS
+
+Many windows may be visible at once on the screen. Windows may show different
+parts of the same buffer, or each may display a different one.
+
+^X 2  Split the current window in two	^X 1   Show only current window
+^X O  Move cursor to next window	^X ^   Enlarge current window
+M-^V  Scroll other window down		M-^Z   Scroll other window up
+
+------------------------------------------------------------------------------
+			       EXITING
+
+^X^C  Exit. Any unsaved files will require confirmation.
+
+------------------------------------------------------------------------------
+				MACROS
+
+^X (  Start recording a keyboard macro. Typing ^G or an error aborts.
+^X )  Stop recording macro.
+^X E  Execute macro.
+
+------------------------------------------------------------------------------
+			 REPEAT & NUMBER PREFIX
+
+^U<number> or M-<number>
+    Number prefix and universal repeat. May be followed by an integer
+    (default = 4) and repeats the next command that many times.
+    Exceptions follow.
+^U<number>^L
+    Reposition the cursor to a particular screen row; i.e., ^U0^L moves the
+    cursor and the line it is on to the top of the screen. Negative numbers
+    are from the bottom of the screen.
+^U<number>^X F
+    Set the right margin to column <number> for paragraph formatting.
+^U<number>^X^
+    Enlarge a split window by <number> rows. A negative number shrinks the
+    window.
+
+------------------------------------------------------------------------------
+			     SPECIAL KEYS
+
+^G   Cancel current command.
+^L   Redraws the screen completely.
+
+------------------------------------------------------------------------------

src/cmd/emg/estruct.h

@@ -0,0 +1,191 @@
+/* This file is in the public domain. */
+
+/* ESTRUCT: Structure and preprocessor */
+
+/* internal constants */
+#define NFILEN	32		/* maximum # of bytes, file name */
+#define NBUFN	16		/* maximum # of bytes, buffer name */
+#define NLINE	512		/* maximum # of bytes, line */
+#define NKBDM	128		/* maximum # of strokes, keyboard macro */
+#define NPAT	80		/* maximum # of bytes, pattern */
+#define HUGE	32700		/* Huge number for "impossible" row&col */
+
+#define METACH	0x1B		/* M- prefix, Control-[, ESC */
+#define BELL	0x07		/* a bell character */
+#define TAB	0x09		/* a tab character */
+
+#define CTRL	0x0100		/* Control flag, or'ed in */
+#define META	0x0200		/* Meta flag, or'ed in */
+#define CTLX	0x0400		/* ^X flag, or'ed in */
+
+#define FALSE	0		/* False, no, bad, etc */
+#define TRUE	1		/* True, yes, good, etc */
+#define ABORT	2		/* Death, ^G, abort, etc */
+
+#define FIOSUC	0		/* File I/O, success */
+#define FIOFNF	1		/* File I/O, file not found */
+#define FIOEOF	2		/* File I/O, end of file */
+#define FIOERR	3		/* File I/O, error */
+#define FIOLNG	4		/* line longer than allowed len */
+
+#define CFCPCN	0x0001		/* Last command was C-P, C-N */
+#define CFKILL	0x0002		/* Last command was a kill */
+
+/*
+ * screen constants
+ * override with
+ * CFLAGS += -DFORCE_COLS=XXX -DFORCE_ROWS=XXX
+ */
+#ifndef FORCE_COLS
+#define FORCE_COLS 80
+#endif
+
+#ifndef FORCE_ROWS
+#define FORCE_ROWS 24
+#endif
+
+/*
+ * XXX:
+ * Default/sane(?) maximum column and row sizes.
+ * Taken from mg1a.
+ *
+ * Let the user override these with
+ * CFLAGS += -DMAXCOL=XXX -DMAXROW=XXX
+ */
+#ifndef MAXCOL
+#define MAXCOL 132
+#endif
+
+#ifndef MAXROW
+#define MAXROW 66
+#endif
+
+/*
+ * There is a window structure allocated for every active display window. The
+ * windows are kept in a big list, in top to bottom screen order, with the
+ * listhead at "wheadp". Each window contains its own values of dot and mark.
+ * The flag field contains some bits that are set by commands to guide
+ * redisplay; although this is a bit of a compromise in terms of decoupling,
+ * the full blown redisplay is just too expensive to run for every input
+ * character
+ */
+typedef struct WINDOW
+{
+  struct WINDOW *w_wndp;	/* Next window */
+  struct BUFFER *w_bufp;	/* Buffer displayed in window */
+  struct LINE *w_linep;		/* Top line in the window */
+  struct LINE *w_dotp;		/* Line containing "." */
+  long w_doto;			/* Byte offset for "." */
+  struct LINE *w_markp;		/* Line containing "mark" */
+  long w_marko;			/* Byte offset for "mark" */
+  char w_toprow;		/* Origin 0 top row of window */
+  char w_ntrows;		/* # of rows of text in window */
+  char w_force;			/* If NZ, forcing row */
+  char w_flag;			/* Flags */
+  int w_dotline;		/* current line number of dot */
+} WINDOW;
+
+#define WFFORCE 0x01	       /* Window needs forced reframe */
+#define WFMOVE	0x02	       /* Movement from line to line */
+#define WFEDIT	0x04	       /* Editing within a line */
+#define WFHARD	0x08	       /* Better to a full display */
+#define WFMODE	0x10	       /* Update mode line */
+
+/*
+ * Text is kept in buffers. A buffer header, described below, exists for every
+ * buffer in the system. The buffers are kept in a big list, so that commands
+ * that search for a buffer by name can find the buffer header. There is a
+ * safe store for the dot and mark in the header, but this is only valid if
+ * the buffer is not being displayed (that is, if "b_nwnd" is 0). The text for
+ * the buffer is kept in a circularly linked list of lines, with a pointer to
+ * the header line in "b_linep". Buffers may be "Inactive" which means the
+ * files accosiated with them have not been read in yet. These get read in at
+ * "use buffer" time
+ */
+typedef struct BUFFER
+{
+  struct BUFFER *b_bufp;	/* Link to next BUFFER */
+  struct LINE *b_dotp;		/* Link to "." LINE structure */
+  long b_doto;			/* Offset of "." in above LINE */
+  struct LINE *b_markp;		/* The same as the above two, */
+  long b_marko;			/* but for the "mark" */
+  struct LINE *b_linep;		/* Link to the header LINE */
+  char b_active;		/* window activated flag */
+  char b_nwnd;			/* Count of windows on buffer */
+  char b_flag;			/* Flags */
+  char b_fname[NFILEN];		/* File name */
+  char b_bname[NBUFN];		/* Buffer name */
+  int b_lines;			/* Number of lines in file */
+} BUFFER;
+
+#define BFTEMP	0x01		/* Internal temporary buffer */
+#define BFCHG	0x02		/* Changed since last write */
+
+/*
+ * The starting position of a region, and the size of the region in
+ * characters, is kept in a region structure.  Used by the region commands
+ */
+typedef struct
+{
+  struct LINE *r_linep;		/* Origin LINE address */
+  long r_offset;		/* Origin LINE offset */
+  long r_size;			/* Length in characters */
+} REGION;
+
+/*
+ * All text is kept in circularly linked lists of "LINE" structures. These
+ * begin at the header line (which is the blank line beyond the end of the
+ * buffer). This line is pointed to by the "BUFFER". Each line contains a the
+ * number of bytes in the line (the "used" size), the size of the text array,
+ * and the text. The end of line is not stored as a byte; it's implied. Future
+ * additions will include update hints, and a list of marks into the line
+ */
+typedef struct LINE
+{
+  struct LINE *l_fp;		/* Link to the next line */
+  struct LINE *l_bp;		/* Link to the previous line */
+  int l_size;			/* Allocated size */
+  int l_used;			/* Used size */
+  char l_text[1];		/* A bunch of characters */
+} LINE;
+
+#define lforw(lp)	((lp)->l_fp)
+#define lback(lp)	((lp)->l_bp)
+#define lgetc(lp, n)	((lp)->l_text[(n)]&0xFF)
+#define lputc(lp, n, c) ((lp)->l_text[(n)]=(c))
+#define llength(lp)	((lp)->l_used)
+
+/*
+ * The editor communicates with the display using a high level interface. A
+ * "TERM" structure holds useful variables, and indirect pointers to routines
+ * that do useful operations. The low level get and put routines are here too.
+ * This lets a terminal, in addition to having non standard commands, have
+ * funny get and put character code too. The calls might get changed to
+ * "termp->t_field" style in the future, to make it possible to run more than
+ * one terminal type
+ */
+typedef struct
+{
+  int t_nrow;			/* Number of rows */
+  int t_ncol;			/* Number of columns */
+  int t_margin;			/* min margin for extended lines */
+  int t_scrsiz;			/* size of scroll region " */
+  void (*t_open) ();		/* Open terminal at the start */
+  void (*t_close) ();		/* Close terminal at end */
+  int (*t_getchar) ();		/* Get character from keyboard */
+  void (*t_putchar) ();		/* Put character to display */
+  void (*t_flush) ();		/* Flush output buffers */
+  void (*t_move) ();		/* Move the cursor, origin 0 */
+  void (*t_eeol) ();		/* Erase to end of line */
+  void (*t_eeop) ();		/* Erase to end of page */
+  void (*t_beep) ();		/* Beep */
+  void (*t_rev) ();		/* set reverse video state */
+} TERM;
+
+/* structure for the table of initial key bindings */
+
+typedef struct
+{
+  short k_code;			/* Key code */
+  int (*k_fp) ();		/* Routine to handle it */
+} KEYTAB;

src/cmd/emg/file.c

@@ -0,0 +1,465 @@
+/* This file is in the public domain. */
+
+/*
+ * The routines in this file handle the reading and writing of disk files.
+ * All details about the reading and writing of the disk are in "fileio.c"
+ */
+
+#include <string.h>		/* strncpy(3) */
+#include "estruct.h"
+#include "edef.h"
+
+extern int mlreply(char *prompt, char *buf, int nbuf);
+extern int swbuffer(BUFFER *bp);
+extern void mlwrite();
+extern int bclear(BUFFER *bp);
+extern int ffropen(char *fn);
+extern int ffgetline(char buf[], int nbuf);
+extern int ffwopen(char *fn);
+extern int ffclose();
+extern int ffputline(char buf[], int nbuf);
+extern BUFFER *bfind();
+extern LINE *lalloc();
+
+int fileread(int f, int n);
+int insfile(int f, int n);
+int filefind(int f, int n);
+int getfile(char fname[]);
+int readin(char fname[]);
+void makename(char bname[], char fname[]);
+int filewrite(int f, int n);
+int filesave(int f, int n);
+int writeout(char *fn);
+int filename(int f, int n);
+int ifile(char fname[]);
+
+/*
+ * Read a file into the current buffer. This is really easy; all you do it
+ * find the name of the file, and call the standard "read a file into the
+ * current buffer" code. Bound to "C-X C-R"
+ */
+int fileread(int f, int n)
+{
+  int s;
+  char fname[NFILEN];
+
+  if ((s = mlreply("Read file: ", fname, NFILEN)) != TRUE)
+    return (s);
+  return (readin(fname));
+}
+
+/*
+ * Insert a file into the current buffer. This is really easy; all you do it
+ * find the name of the file, and call the standard "insert a file into the
+ * current buffer" code. Bound to "C-X C-I".
+ */
+int insfile(int f, int n)
+{
+  int s;
+  char fname[NFILEN];
+
+  if ((s = mlreply("Insert file: ", fname, NFILEN)) != TRUE)
+    return (s);
+  return (ifile(fname));
+}
+
+/*
+ * Select a file for editing. Look around to see if you can find the fine in
+ * another buffer; if you can find it just switch to the buffer. If you cannot
+ * find the file, create a new buffer, read in the text, and switch to the new
+ * buffer. Bound to C-X C-F.
+ */
+int filefind(int f, int n)
+{
+  char fname[NFILEN];		/* file user wishes to find */
+  int s;			/* status return */
+
+  if ((s = mlreply("Find file: ", fname, NFILEN)) != TRUE)
+    return (s);
+  return (getfile(fname));
+}
+
+int getfile(char fname[])
+{
+  BUFFER *bp;
+  LINE *lp;
+  char bname[NBUFN];		/* buffer name to put file */
+  int i, s;
+
+  for (bp = bheadp; bp != (BUFFER*)0; bp = bp->b_bufp)
+    {
+      if ((bp->b_flag & BFTEMP) == 0 && strcmp(bp->b_fname, fname) == 0)
+	{
+	  if (--curbp->b_nwnd == 0)
+	    {
+	      curbp->b_dotp = curwp->w_dotp;
+	      curbp->b_doto = curwp->w_doto;
+	      curbp->b_markp = curwp->w_markp;
+	      curbp->b_marko = curwp->w_marko;
+	    }
+	  swbuffer(bp);
+	  lp = curwp->w_dotp;
+	  i = curwp->w_ntrows / 2;
+	  while (i-- && lback(lp) != curbp->b_linep)
+	    lp = lback(lp);
+	  curwp->w_linep = lp;
+	  curwp->w_flag |= WFMODE | WFHARD;
+	  mlwrite("[Old buffer]");
+	  return (TRUE);
+	}
+    }
+  makename(bname, fname);	/* New buffer name */
+  while ((bp = bfind(bname, FALSE, 0)) != (BUFFER*)0)
+    {
+      s = mlreply("Buffer name: ", bname, NBUFN);
+      if (s == ABORT)		/* ^G to just quit */
+	return (s);
+      if (s == FALSE)
+	{			/* CR to clobber it */
+	  makename(bname, fname);
+	  break;
+	}
+    }
+  if (bp == (BUFFER*)0 && (bp = bfind(bname, TRUE, 0)) == (BUFFER*)0)
+    {
+      mlwrite("Cannot create buffer");
+      return (FALSE);
+    }
+  if (--curbp->b_nwnd == 0)
+    {				/* Undisplay */
+      curbp->b_dotp = curwp->w_dotp;
+      curbp->b_doto = curwp->w_doto;
+      curbp->b_markp = curwp->w_markp;
+      curbp->b_marko = curwp->w_marko;
+    }
+  curbp = bp;			/* Switch to it */
+  curwp->w_bufp = bp;
+  curbp->b_nwnd++;
+  return (readin(fname));	/* Read it in */
+}
+
+/*
+ * Read file "fname" into the current buffer, blowing away any text found
+ * there. Called by both the read and find commands. Return the final status
+ * of the read. Also called by the mainline, to read in a file specified on
+ * the command line as an argument.
+ */
+int readin(char fname[])
+{
+  LINE *lp1, *lp2;
+  WINDOW *wp;
+  BUFFER *bp;
+  char line[NLINE];
+  int nbytes, s, i;
+  int nline = 0;		/* initialize here to silence a gcc warning */
+  int lflag;			/* any lines longer than allowed? */
+
+  bp = curbp;			/* Cheap */
+  if ((s = bclear(bp)) != TRUE) /* Might be old */
+    return (s);
+  bp->b_flag &= ~(BFTEMP | BFCHG);
+  strncpy(bp->b_fname, fname, NFILEN);
+  if ((s = ffropen(fname)) == FIOERR) /* Hard file open */
+    goto out;
+  if (s == FIOFNF)
+    {				/* File not found */
+      mlwrite("[New file]");
+      goto out;
+    }
+  mlwrite("[Reading file]");
+  lflag = FALSE;
+  while ((s = ffgetline(line, NLINE)) == FIOSUC || s == FIOLNG)
+    {
+      if (s == FIOLNG)
+	lflag = TRUE;
+      nbytes = strlen(line);
+      if ((lp1 = lalloc(nbytes)) == NULL)
+	{
+	  s = FIOERR;		/* Keep message on the display */
+	  break;
+	}
+      lp2 = lback(curbp->b_linep);
+      lp2->l_fp = lp1;
+      lp1->l_fp = curbp->b_linep;
+      lp1->l_bp = lp2;
+      curbp->b_linep->l_bp = lp1;
+      for (i = 0; i < nbytes; ++i)
+	lputc(lp1, i, line[i]);
+      ++nline;
+    }
+  ffclose();			/* Ignore errors */
+  if (s == FIOEOF)
+    {				/* Don't zap message! */
+      if (nline != 1)
+	mlwrite("[Read %d lines]", nline);
+      else
+	mlwrite("[Read 1 line]");
+    }
+  if (lflag)
+    {
+      if (nline != 1)
+	mlwrite("[Read %d lines: Long lines wrapped]", nline);
+      else
+	mlwrite("[Read 1 line: Long lines wrapped]");
+    }
+  curwp->w_bufp->b_lines = nline;
+ out:
+  for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
+    {
+      if (wp->w_bufp == curbp)
+	{
+	  wp->w_linep = lforw(curbp->b_linep);
+	  wp->w_dotp = lforw(curbp->b_linep);
+	  wp->w_doto = 0;
+	  wp->w_markp = NULL;
+	  wp->w_marko = 0;
+	  wp->w_flag |= WFMODE | WFHARD;
+	}
+    }
+  if (s == FIOERR || s == FIOFNF) /* False if error */
+    return (FALSE);
+  return (TRUE);
+}
+
+/*
+ * Take a file name, and from it fabricate a buffer name. This routine knows
+ * about the syntax of file names on the target system. I suppose that this
+ * information could be put in a better place than a line of code.
+ */
+void makename(char bname[], char fname[])
+{
+  char *cp1, *cp2;
+
+  cp1 = &fname[0];
+  while (*cp1 != 0)
+    ++cp1;
+
+  while (cp1 != &fname[0] && cp1[-1] != '/')
+    --cp1;
+  cp2 = &bname[0];
+  while (cp2 != &bname[NBUFN - 1] && *cp1 != 0 && *cp1 != ';')
+    *cp2++ = *cp1++;
+  *cp2 = 0;
+}
+
+/*
+ * Ask for a file name, and write the contents of the current buffer to that
+ * file. Update the remembered file name and clear the buffer changed flag.
+ * This handling of file names is different from the earlier versions, and is
+ * more compatable with Gosling EMACS than with ITS EMACS. Bound to "C-X C-W".
+ */
+int filewrite(int f, int n)
+{
+  WINDOW *wp;
+  char fname[NFILEN];
+  int s;
+
+  if ((s = mlreply("Write file: ", fname, NFILEN)) != TRUE)
+    return (s);
+  if ((s = writeout(fname)) == TRUE)
+    {
+      strncpy(curbp->b_fname, fname, NFILEN);
+      curbp->b_flag &= ~BFCHG;
+      wp = wheadp;		/* Update mode lines */
+      while (wp != NULL)
+	{
+	  if (wp->w_bufp == curbp)
+	    wp->w_flag |= WFMODE;
+	  wp = wp->w_wndp;
+	}
+    }
+  return (s);
+}
+
+/*
+ * Save the contents of the current buffer in its associatd file. No nothing
+ * if nothing has changed (this may be a bug, not a feature). Error if there
+ * is no remembered file name for the buffer. Bound to "C-X C-S". May get
+ * called by "C-Z"
+ */
+int filesave(int f, int n)
+{
+  WINDOW *wp;
+  int s;
+
+  if ((curbp->b_flag & BFCHG) == 0) /* Return, no changes */
+    return (TRUE);
+  if (curbp->b_fname[0] == 0)
+    {				/* Must have a name */
+      mlwrite("No file name");
+      return (FALSE);
+    }
+  if ((s = writeout(curbp->b_fname)) == TRUE)
+    {
+      curbp->b_flag &= ~BFCHG;
+      wp = wheadp;		/* Update mode lines */
+      while (wp != NULL)
+	{
+	  if (wp->w_bufp == curbp)
+	    wp->w_flag |= WFMODE;
+	  wp = wp->w_wndp;
+	}
+    }
+  return (s);
+}
+
+/*
+ * This function performs the details of file writing. Uses the file
+ * management routines in the "fileio.c" package. The number of lines written
+ * is displayed. Sadly, it looks inside a LINE; provide a macro for this. Most
+ * of the grief is error checking of some sort.
+ */
+int writeout(char *fn)
+{
+  LINE *lp;
+  int nline, s;
+
+  if ((s = ffwopen(fn)) != FIOSUC) /* Open writes message */
+    return (FALSE);
+  mlwrite("[Writing]");		/* tell us were writing */
+  lp = lforw(curbp->b_linep);	/* First line */
+  nline = 0;			/* Number of lines */
+  while (lp != curbp->b_linep)
+    {
+      if ((s = ffputline(&lp->l_text[0], llength(lp))) != FIOSUC)
+	break;
+      ++nline;
+      lp = lforw(lp);
+    }
+  if (s == FIOSUC)
+    {				/* No write error */
+      s = ffclose();
+      if (s == FIOSUC)
+	{			/* No close error */
+	  if (nline != 1)
+	    mlwrite("[Wrote %d lines]", nline);
+	  else
+	    mlwrite("[Wrote 1 line]");
+	}
+    }
+  else				/* ignore close error */
+    ffclose();			/* if a write error */
+  if (s != FIOSUC)		/* some sort of error */
+    return (FALSE);
+  return (TRUE);
+}
+
+/*
+ * The command allows the user to modify the file name associated with the
+ * current buffer. It is like the "f" command in UNIX "ed". The operation is
+ * simple; just zap the name in the BUFFER structure, and mark the windows as
+ * needing an update. You can type a blank line at the prompt if you wish.
+ */
+int filename(int f, int n)
+{
+  WINDOW *wp;
+  char fname[NFILEN];
+  int s;
+
+  if ((s = mlreply("Name: ", fname, NFILEN)) == ABORT)
+    return (s);
+  if (s == FALSE)
+    strncpy(curbp->b_fname, "", 1);
+  else
+    strncpy(curbp->b_fname, fname, NFILEN);
+  wp = wheadp;			/* update mode lines */
+  while (wp != NULL)
+    {
+      if (wp->w_bufp == curbp)
+	wp->w_flag |= WFMODE;
+      wp = wp->w_wndp;
+    }
+  return (TRUE);
+}
+
+/*
+ * Insert file "fname" into the current buffer, Called by insert file command.
+ * Return the final status of the read.
+ */
+int ifile(char fname[])
+{
+  LINE *lp0, *lp1, *lp2;
+  BUFFER *bp;
+  char line[NLINE];
+  int i, s, nbytes;
+  int nline = 0;
+  int lflag;			/* any lines longer than allowed? */
+
+  bp = curbp;			/* Cheap */
+  bp->b_flag |= BFCHG;		/* we have changed */
+  bp->b_flag &= ~BFTEMP;	/* and are not temporary */
+  if ((s = ffropen(fname)) == FIOERR) /* Hard file open */
+    goto out;
+  if (s == FIOFNF)
+    {				/* File not found */
+      mlwrite("[No such file]");
+      return (FALSE);
+    }
+  mlwrite("[Inserting file]");
+
+  /* back up a line and save the mark here */
+  curwp->w_dotp = lback(curwp->w_dotp);
+  curwp->w_doto = 0;
+  curwp->w_markp = curwp->w_dotp;
+  curwp->w_marko = 0;
+
+  lflag = FALSE;
+  while ((s = ffgetline(line, NLINE)) == FIOSUC || s == FIOLNG)
+    {
+      if (s == FIOLNG)
+	lflag = TRUE;
+      nbytes = strlen(line);
+      if ((lp1 = lalloc(nbytes)) == NULL)
+	{
+	  s = FIOERR;		/* keep message on the */
+	  break;		/* display */
+	}
+      lp0 = curwp->w_dotp;	/* line previous to insert */
+      lp2 = lp0->l_fp;		/* line after insert */
+
+      /* re-link new line between lp0 and lp2 */
+      lp2->l_bp = lp1;
+      lp0->l_fp = lp1;
+      lp1->l_bp = lp0;
+      lp1->l_fp = lp2;
+
+      /* and advance and write out the current line */
+      curwp->w_dotp = lp1;
+      for (i = 0; i < nbytes; ++i)
+	lputc(lp1, i, line[i]);
+      ++nline;
+    }
+  ffclose();			/* Ignore errors */
+  curwp->w_markp = lforw(curwp->w_markp);
+  if (s == FIOEOF)
+    {				/* Don't zap message! */
+      if (nline != 1)
+	mlwrite("[Inserted %d lines]", nline);
+      else
+	mlwrite("[Inserted 1 line]");
+    }
+  if (lflag)
+    {
+      if (nline != 1)
+	mlwrite("[Inserted %d lines: Long lines wrapped]", nline);
+      else
+	mlwrite("[Inserted 1 line: Long lines wrapped]");
+    }
+ out:
+  /* advance to the next line and mark the window for changes */
+  curwp->w_dotp = lforw(curwp->w_dotp);
+  curwp->w_flag |= WFHARD;
+
+  /* copy window parameters back to the buffer structure */
+  curbp->b_dotp = curwp->w_dotp;
+  curbp->b_doto = curwp->w_doto;
+  curbp->b_markp = curwp->w_markp;
+  curbp->b_marko = curwp->w_marko;
+
+  /* we need to update number of lines in the buffer */
+  curwp->w_bufp->b_lines += nline;
+
+  if (s == FIOERR)		/* False if error */
+    return (FALSE);
+  return (TRUE);
+}

src/cmd/emg/fileio.c

@@ -0,0 +1,121 @@
+/* This file is in the public domain. */
+
+/*
+ * The routines in this file read and write ASCII files from the disk. All of
+ * the knowledge about files is here. A better message writing scheme should
+ * be used
+ */
+
+#include <stdio.h>		/* fopen(3), et.al. */
+#include "estruct.h"
+
+extern void mlwrite();
+
+int ffropen(char *fn);
+int ffwopen(char *fn);
+int ffclose();
+int ffputline(char buf[], int nbuf);
+int ffgetline(char buf[], int nbuf);
+
+FILE *ffp;			/* File pointer, all functions */
+
+/*
+ * Open a file for reading.
+ */
+int ffropen(char *fn)
+{
+  if ((ffp = fopen(fn, "r")) == NULL)
+    return (FIOFNF);
+  return (FIOSUC);
+}
+
+/*
+ * Open a file for writing. Return TRUE if all is well, and FALSE on error
+ * (cannot create).
+ */
+int ffwopen(char *fn)
+{
+  if ((ffp = fopen(fn, "w")) == NULL)
+    {
+      mlwrite("Cannot open file for writing");
+      return (FIOERR);
+    }
+  return (FIOSUC);
+}
+
+/*
+ * Close a file. Should look at the status in all systems.
+ */
+int ffclose()
+{
+  if (fclose(ffp) != FALSE)
+    {
+      mlwrite("Error closing file");
+      return (FIOERR);
+    }
+  return (FIOSUC);
+}
+
+/*
+ * Write a line to the already opened file. The "buf" points to the buffer,
+ * and the "nbuf" is its length, less the free newline. Return the status.
+ * Check only at the newline.
+ */
+int ffputline(char buf[], int nbuf)
+{
+  int i;
+
+  for (i = 0; i < nbuf; ++i)
+    fputc(buf[i] & 0xFF, ffp);
+
+  fputc('\n', ffp);
+
+  if (ferror(ffp))
+    {
+      mlwrite("Write I/O error");
+      return (FIOERR);
+    }
+  return (FIOSUC);
+}
+
+/*
+ * Read a line from a file, and store the bytes in the supplied buffer. The
+ * "nbuf" is the length of the buffer. Complain about long lines and lines at
+ * the end of the file that don't have a newline present. Check for I/O errors
+ * too. Return status.
+ */
+int ffgetline(char buf[], int nbuf)
+{
+  int c, i;
+
+  i = 0;
+
+  while ((c = fgetc(ffp)) != EOF && c != '\n')
+    {
+      if (i >= nbuf - 2)
+	{
+	  buf[nbuf - 2] = c;	   /* store last char read */
+	  buf[nbuf - 1] = 0;	   /* and terminate it */
+	  mlwrite("File has long lines");
+	  return (FIOLNG);
+	}
+      buf[i++] = c;
+    }
+
+  if (c == EOF)
+    {
+      if (ferror(ffp))
+	{
+	  mlwrite("File read error");
+	  return (FIOERR);
+	}
+      if (i != 0)
+	{
+	  mlwrite("No newline at EOF");
+	  return (FIOERR);
+	}
+      return (FIOEOF);
+    }
+  buf[i] = 0;
+  return (FIOSUC);
+}

src/cmd/emg/line.c

@@ -0,0 +1,507 @@
+/* This file is in the public domain. */
+
+/*
+ * The functions in this file are a general set of line management utilities.
+ * They are the only routines that touch the text. They also touch the buffer
+ * and window structures, to make sure that the necessary updating gets done.
+ * There are routines in this file that handle the kill buffer too. It isn't
+ * here for any good reason.
+ *
+ * Note that this code only updates the dot and mark values in the window
+ * list. Since all the code acts on the current window, the buffer that we are
+ * editing must be being displayed, which means that "b_nwnd" is non zero,
+ * which means that the dot and mark values in the buffer headers are
+ * nonsense
+ */
+
+#include <stdlib.h>		/* malloc(3) */
+#include "estruct.h"
+#include "edef.h"
+
+extern void mlwrite();
+extern int backchar(int f, int n);
+
+LINE* lalloc(int used);
+void lfree(LINE *lp);
+void lchange(int flag);
+int linsert(int n, int c);
+int lnewline();
+int ldelete(int n, int kflag);
+int ldelnewline();
+void kdelete();
+int kinsert(int c);
+int kremove(int n);
+
+#define NBLOCK	16		/* Line block chunk size */
+#define KBLOCK	1024		/* Kill buffer block size */
+
+char *kbufp = NULL;		/* Kill buffer data */
+unsigned long kused = 0;	/* # of bytes used in KB */
+unsigned long ksize = 0;	/* # of bytes allocated in KB */
+
+/*
+ * This routine allocates a block of memory large enough to hold a LINE
+ * containing "used" characters. The block is always rounded up a bit. Return
+ * a pointer to the new block, or NULL if there isn't any memory left. Print a
+ * message in the message line if no space.
+ */
+LINE* lalloc(int used)
+{
+  LINE *lp;
+  int size;
+
+  size = (used + NBLOCK - 1) & ~(NBLOCK - 1);
+  if (size == 0)	       /* Assume that an empty */
+    size = NBLOCK;	       /* line is for type-in */
+  if ((lp = (LINE *) malloc(sizeof(LINE) + size)) == NULL)
+    {
+      mlwrite("Cannot allocate %d bytes", size);
+      return (NULL);
+    }
+  lp->l_size = size;
+  lp->l_used = used;
+  return (lp);
+}
+
+/*
+ * Delete line "lp". Fix all of the links that might point at it (they are
+ * moved to offset 0 of the next line. Unlink the line from whatever buffer it
+ * might be in. Release the memory. The buffers are updated too; the magic
+ * conditions described in the above comments don't hold here
+ */
+void lfree(LINE *lp)
+{
+  BUFFER *bp;
+  WINDOW *wp;
+
+  wp = wheadp;
+  while (wp != NULL)
+    {
+      if (wp->w_linep == lp)
+	wp->w_linep = lp->l_fp;
+      if (wp->w_dotp == lp)
+	{
+	  wp->w_dotp = lp->l_fp;
+	  wp->w_doto = 0;
+	}
+      if (wp->w_markp == lp)
+	{
+	  wp->w_markp = lp->l_fp;
+	  wp->w_marko = 0;
+	}
+      wp = wp->w_wndp;
+    }
+  bp = bheadp;
+  while (bp != NULL)
+    {
+      if (bp->b_nwnd == 0)
+	{
+	  if (bp->b_dotp == lp)
+	    {
+	      bp->b_dotp = lp->l_fp;
+	      bp->b_doto = 0;
+	    }
+	  if (bp->b_markp == lp)
+	    {
+	      bp->b_markp = lp->l_fp;
+	      bp->b_marko = 0;
+	    }
+	}
+      bp = bp->b_bufp;
+    }
+  lp->l_bp->l_fp = lp->l_fp;
+  lp->l_fp->l_bp = lp->l_bp;
+  free((char *) lp);
+}
+
+/*
+ * This routine gets called when a character is changed in place in the
+ * current buffer. It updates all of the required flags in the buffer and
+ * window system. The flag used is passed as an argument; if the buffer is
+ * being displayed in more than 1 window we change EDIT t HARD. Set MODE if
+ * the mode line needs to be updated (the "*" has to be set).
+ */
+void lchange(int flag)
+{
+  WINDOW *wp;
+
+  if (curbp->b_nwnd != 1)      /* Ensure hard */
+    flag = WFHARD;
+  if ((curbp->b_flag & BFCHG) == 0)
+    {			       /* First change, so */
+      flag |= WFMODE;	       /* update mode lines */
+      curbp->b_flag |= BFCHG;
+    }
+  wp = wheadp;
+  while (wp != NULL)
+    {
+      if (wp->w_bufp == curbp)
+	wp->w_flag |= flag;
+      wp = wp->w_wndp;
+    }
+}
+
+/*
+ * Insert "n" copies of the character "c" at the current location of dot. In
+ * the easy case all that happens is the text is stored in the line. In the
+ * hard case, the line has to be reallocated. When the window list is updated,
+ * take special care; I screwed it up once. You always update dot in the
+ * current window. You update mark, and a dot in another window, if it is
+ * greater than the place where you did the insert. Return TRUE if all is
+ * well, and FALSE on errors
+ */
+int linsert(int n, int c)
+{
+  WINDOW *wp;
+  LINE *lp1, *lp2, *lp3;
+  char *cp1, *cp2;
+  int i, doto;
+
+  lchange(WFEDIT);
+  lp1 = curwp->w_dotp;	       /* Current line */
+  if (lp1 == curbp->b_linep)
+    {			       /* At the end: special */
+      if (curwp->w_doto != 0)
+	{
+	  mlwrite("Bug: linsert");
+	  return (FALSE);
+	}
+      if ((lp2 = lalloc(n)) == NULL)	/* Allocate new line */
+	return (FALSE);
+      lp3 = lp1->l_bp;	       /* Previous line */
+      lp3->l_fp = lp2;	       /* Link in */
+      lp2->l_fp = lp1;
+      lp1->l_bp = lp2;
+      lp2->l_bp = lp3;
+      for (i = 0; i < n; ++i)
+	lp2->l_text[i] = c;
+      curwp->w_dotp = lp2;
+      curwp->w_doto = n;
+      return (TRUE);
+    }
+  doto = curwp->w_doto;	       /* Save for later */
+  if (lp1->l_used + n > lp1->l_size)
+    {			       /* Hard: reallocate */
+      if ((lp2 = lalloc(lp1->l_used + n)) == NULL)
+	return (FALSE);
+      cp1 = &lp1->l_text[0];
+      cp2 = &lp2->l_text[0];
+      while (cp1 != &lp1->l_text[doto])
+	*cp2++ = *cp1++;
+      cp2 += n;
+      while (cp1 != &lp1->l_text[lp1->l_used])
+	*cp2++ = *cp1++;
+      lp1->l_bp->l_fp = lp2;
+      lp2->l_fp = lp1->l_fp;
+      lp1->l_fp->l_bp = lp2;
+      lp2->l_bp = lp1->l_bp;
+      free((char *) lp1);
+    }
+  else
+    {				/* Easy: in place */
+      lp2 = lp1;		/* Pretend new line */
+      lp2->l_used += n;
+      cp2 = &lp1->l_text[lp1->l_used];
+      cp1 = cp2 - n;
+      while (cp1 != &lp1->l_text[doto])
+	*--cp2 = *--cp1;
+    }
+  for (i = 0; i < n; ++i)	/* Add the characters */
+    lp2->l_text[doto + i] = c;
+  wp = wheadp;		       /* Update windows */
+  while (wp != NULL)
+    {
+      if (wp->w_linep == lp1)
+	wp->w_linep = lp2;
+      if (wp->w_dotp == lp1)
+	{
+	  wp->w_dotp = lp2;
+	  if (wp == curwp || wp->w_doto > doto)
+	    wp->w_doto += n;
+	}
+      if (wp->w_markp == lp1)
+	{
+	  wp->w_markp = lp2;
+	  if (wp->w_marko > doto)
+	    wp->w_marko += n;
+	}
+      wp = wp->w_wndp;
+    }
+  return (TRUE);
+}
+
+/*
+ * Insert a newline into the buffer at the current location of dot in the
+ * current window. The funny ass-backwards way it does things is not a botch;
+ * it just makes the last line in the file not a special case. Return TRUE if
+ * everything works out and FALSE on error (memory allocation failure). The
+ * update of dot and mark is a bit easier then in the above case, because the
+ * split forces more updating.
+ */
+int lnewline()
+{
+  WINDOW *wp;
+  char *cp1, *cp2;
+  LINE *lp1, *lp2;
+  int doto;
+
+  lchange(WFHARD);
+
+  curwp->w_bufp->b_lines++;
+
+  lp1 = curwp->w_dotp;	       /* Get the address and */
+  doto = curwp->w_doto;	       /* offset of "." */
+  if ((lp2 = lalloc(doto)) == NULL)	/* New first half line */
+    return (FALSE);
+  cp1 = &lp1->l_text[0];       /* Shuffle text around */
+  cp2 = &lp2->l_text[0];
+  while (cp1 != &lp1->l_text[doto])
+    *cp2++ = *cp1++;
+  cp2 = &lp1->l_text[0];
+  while (cp1 != &lp1->l_text[lp1->l_used])
+    *cp2++ = *cp1++;
+  lp1->l_used -= doto;
+  lp2->l_bp = lp1->l_bp;
+  lp1->l_bp = lp2;
+  lp2->l_bp->l_fp = lp2;
+  lp2->l_fp = lp1;
+  wp = wheadp;		       /* Windows */
+  while (wp != NULL)
+    {
+      if (wp->w_linep == lp1)
+	wp->w_linep = lp2;
+      if (wp->w_dotp == lp1)
+	{
+	  if (wp->w_doto < doto)
+	    wp->w_dotp = lp2;
+	  else
+	    wp->w_doto -= doto;
+	}
+      if (wp->w_markp == lp1)
+	{
+	  if (wp->w_marko < doto)
+	    wp->w_markp = lp2;
+	  else
+	    wp->w_marko -= doto;
+	}
+      wp = wp->w_wndp;
+    }
+  curwp->w_dotline++;
+  return (TRUE);
+}
+
+/*
+ * This function deletes "n" bytes, starting at dot. It understands how do
+ * deal with end of lines, etc. It returns TRUE if all of the characters were
+ * deleted, and FALSE if they were not (because dot ran into the end of the
+ * buffer. The "kflag" is TRUE if the text should be put in the kill buffer.
+ */
+int ldelete(int n, int kflag)
+{
+  LINE *dotp;
+  WINDOW *wp;
+  char *cp1, *cp2;
+  int doto, chunk;
+
+  while (n != 0)
+    {
+      dotp = curwp->w_dotp;
+      doto = curwp->w_doto;
+      if (dotp == curbp->b_linep) /* Hit end of buffer */
+	return (FALSE);
+      chunk = dotp->l_used - doto; /* Size of chunk */
+      if (chunk > n)
+	chunk = n;
+      if (chunk == 0)
+	{			/* End of line, merge */
+	  lchange(WFHARD);
+	  if (ldelnewline() == FALSE
+	      || (kflag != FALSE && kinsert('\n') == FALSE))
+	    return (FALSE);
+	  --n;
+	  continue;
+	}
+      lchange(WFEDIT);
+      cp1 = &dotp->l_text[doto]; /* Scrunch text */
+      cp2 = cp1 + chunk;
+      if (kflag != FALSE)
+	{			/* Kill? */
+	  while (cp1 != cp2)
+	    {
+	      if (kinsert (*cp1) == FALSE)
+		return (FALSE);
+	      ++cp1;
+	    }
+	  cp1 = &dotp->l_text[doto];
+	}
+      while (cp2 != &dotp->l_text[dotp->l_used])
+	*cp1++ = *cp2++;
+      dotp->l_used -= chunk;
+      wp = wheadp;		/* Fix windows */
+      while (wp != NULL)
+	{
+	  if (wp->w_dotp == dotp && wp->w_doto >= doto)
+	    {
+	      wp->w_doto -= chunk;
+	      if (wp->w_doto < doto)
+		wp->w_doto = doto;
+	    }
+	  if (wp->w_markp == dotp && wp->w_marko >= doto)
+	    {
+	      wp->w_marko -= chunk;
+	      if (wp->w_marko < doto)
+		wp->w_marko = doto;
+	    }
+	  wp = wp->w_wndp;
+	}
+      n -= chunk;
+    }
+  return (TRUE);
+}
+
+/*
+ * Delete a newline. Join the current line with the next line. If the next
+ * line is the magic header line always return TRUE; merging the last line
+ * with the header line can be thought of as always being a successful
+ * operation, even if nothing is done, and this makes the kill buffer work
+ * "right". Easy cases can be done by shuffling data around. Hard cases
+ * require that lines be moved about in memory. Return FALSE on error and TRUE
+ * if all looks ok. Called by "ldelete" only.
+ */
+int ldelnewline()
+{
+  LINE *lp1, *lp2, *lp3;
+  WINDOW *wp;
+  char *cp1, *cp2;
+
+  lp1 = curwp->w_dotp;
+  lp2 = lp1->l_fp;
+  if (lp2 == curbp->b_linep)
+    {			       /* At the buffer end */
+      if (lp1->l_used == 0)	 /* Blank line */
+	lfree(lp1);
+      return (TRUE);
+    }
+  /* Keep line counts in sync */
+  curwp->w_bufp->b_lines--;
+  if (lp2->l_used <= lp1->l_size - lp1->l_used)
+    {
+      cp1 = &lp1->l_text[lp1->l_used];
+      cp2 = &lp2->l_text[0];
+      while (cp2 != &lp2->l_text[lp2->l_used])
+	*cp1++ = *cp2++;
+      wp = wheadp;
+      while (wp != NULL)
+	{
+	  if (wp->w_linep == lp2)
+	    wp->w_linep = lp1;
+	  if (wp->w_dotp == lp2)
+	    {
+	      wp->w_dotp = lp1;
+	      wp->w_doto += lp1->l_used;
+	    }
+	  if (wp->w_markp == lp2)
+	    {
+	      wp->w_markp = lp1;
+	      wp->w_marko += lp1->l_used;
+	    }
+	  wp = wp->w_wndp;
+	}
+      lp1->l_used += lp2->l_used;
+      lp1->l_fp = lp2->l_fp;
+      lp2->l_fp->l_bp = lp1;
+      free((char *) lp2);
+      return (TRUE);
+    }
+  if ((lp3 = lalloc(lp1->l_used + lp2->l_used)) == NULL)
+    return (FALSE);
+  cp1 = &lp1->l_text[0];
+  cp2 = &lp3->l_text[0];
+  while (cp1 != &lp1->l_text[lp1->l_used])
+    *cp2++ = *cp1++;
+  cp1 = &lp2->l_text[0];
+  while (cp1 != &lp2->l_text[lp2->l_used])
+    *cp2++ = *cp1++;
+  lp1->l_bp->l_fp = lp3;
+  lp3->l_fp = lp2->l_fp;
+  lp2->l_fp->l_bp = lp3;
+  lp3->l_bp = lp1->l_bp;
+  wp = wheadp;
+  while (wp != NULL)
+    {
+      if (wp->w_linep == lp1 || wp->w_linep == lp2)
+	wp->w_linep = lp3;
+      if (wp->w_dotp == lp1)
+	wp->w_dotp = lp3;
+      else if (wp->w_dotp == lp2)
+	{
+	  wp->w_dotp = lp3;
+	  wp->w_doto += lp1->l_used;
+	}
+      if (wp->w_markp == lp1)
+	wp->w_markp = lp3;
+      else if (wp->w_markp == lp2)
+	{
+	  wp->w_markp = lp3;
+	  wp->w_marko += lp1->l_used;
+	}
+      wp = wp->w_wndp;
+    }
+  free((char *) lp1);
+  free((char *) lp2);
+  return (TRUE);
+}
+
+/*
+ * Delete all of the text saved in the kill buffer. Called by commands when a
+ * new kill context is being created. The kill buffer array is released, just
+ * in case the buffer has grown to immense size. No errors.
+ */
+void kdelete()
+{
+  if (kbufp != NULL)
+    {
+      free((char *) kbufp);
+      kbufp = NULL;
+      kused = 0;
+      ksize = 0;
+    }
+}
+
+/*
+ * Insert a character to the kill buffer, enlarging the buffer if there isn't
+ * any room. Always grow the buffer in chunks, on the assumption that if you
+ * put something in the kill buffer you are going to put more stuff there too
+ * later. Return TRUE if all is well, and FALSE on errors.
+ */
+int kinsert(int c)
+{
+  char *nbufp;
+
+  if (kused == ksize)
+    {
+      if (ksize == 0)	       /* first time through? */
+	nbufp = malloc(KBLOCK); /* alloc the first block */
+      else		       /* or re allocate a bigger block */
+	nbufp = realloc(kbufp, ksize + KBLOCK);
+      if (nbufp == NULL)	       /* abort if it fails */
+	return (FALSE);
+      kbufp = nbufp;	       /* point our global at it */
+      ksize += KBLOCK;	       /* and adjust the size */
+    }
+  kbufp[kused++] = c;
+  return (TRUE);
+}
+
+/*
+ * This function gets characters from the kill buffer. If the character index
+ * "n" is off the end, it returns "-1". This lets the caller just scan along
+ * until it gets a "-1" back.
+ */
+int kremove(int n)
+{
+  if (n >= kused)
+    return (-1);
+  else
+    return (kbufp[n] & 0xFF);
+}

src/cmd/emg/main.c

@@ -0,0 +1,469 @@
+/* This file is in the public domain. */
+
+/*
+ * This program is in public domain; originally written by Dave G. Conroy.
+ * This file contains the main driving routine, and some keyboard processing
+ * code
+ */
+
+#define maindef			/* make global definitions not external */
+
+#include <string.h>		/* strncpy(3) */
+#include <stdlib.h>		/* malloc(3) */
+#include "estruct.h"		/* global structures and defines */
+#include "efunc.h"		/* function declarations and name table */
+#include "edef.h"		/* global definitions */
+#include "ebind.h"
+
+extern void getwinsize();
+extern void vtinit();
+extern void vttidy();
+extern void update();
+extern void mlerase();
+extern void mlwrite();
+extern int mlyesno(char *prompt);
+extern void makename(char bname[], char fname[]);
+extern int readin(char fname[]);
+extern int linsert(int f, int n);
+extern int anycb();
+extern BUFFER *bfind();
+
+void edinit(char bname[]);
+int execute(int c, int f, int n);
+int getkey();
+int getctl();
+int quickexit(int f, int n);
+int quit(int f, int n);
+int ctlxlp(int f, int n);
+int ctlxrp(int f, int n);
+int ctlxe(int f, int n);
+int ctrlg(int f, int n);
+int extendedcmd(int f, int n);
+
+int main(int argc, char *argv[])
+{
+  BUFFER *bp;
+  char bname[NBUFN];		/* buffer name of file to read */
+  int c, f, n, mflag;
+  int ffile;			/* first file flag */
+  int carg;			/* current arg to scan */
+  int basec;			/* c stripped of meta character */
+
+  /* initialize the editor and process the startup file */
+  getwinsize();			/* find out the "real" screen size */
+  strncpy(bname, "main", 5);	/* default buffer name */
+  edinit(bname);		/* Buffers, windows */
+  vtinit();			/* Displays */
+  ffile = TRUE;			/* no file to edit yet */
+  update();			/* let the user know we are here */
+
+  /* scan through the command line and get the files to edit */
+  for (carg = 1; carg < argc; ++carg)
+    {
+      /* set up a buffer for this file */
+      makename(bname, argv[carg]);
+
+      /* if this is the first file, read it in */
+      if (ffile)
+	{
+	  bp = curbp;
+	  makename(bname, argv[carg]);
+	  strncpy(bp->b_bname, bname, NBUFN);
+	  strncpy(bp->b_fname, argv[carg], NFILEN);
+	  if (readin(argv[carg]) == ABORT)
+	    {
+	      strncpy(bp->b_bname, "main", 5);
+	      strncpy(bp->b_fname, "", 1);
+	    }
+	  bp->b_dotp = bp->b_linep;
+	  bp->b_doto = 0;
+	  ffile = FALSE;
+	}
+      else
+	{
+	  /* set this to inactive */
+	  bp = bfind(bname, TRUE, 0);
+	  strncpy(bp->b_fname, argv[carg], NFILEN);
+	  bp->b_active = FALSE;
+	}
+    }
+
+  /* setup to process commands */
+  lastflag = 0;			/* Fake last flags */
+  curwp->w_flag |= WFMODE;	/* and force an update */
+
+ loop:
+  update();			/* Fix up the screen */
+  c = getkey();
+  if (mpresf != FALSE)
+    {
+      mlerase();
+      update();
+    }
+  f = FALSE;
+  n = 1;
+
+  /* do META-# processing if needed */
+
+  basec = c & ~META;		/* strip meta char off if there */
+  if ((c & META) && ((basec >= '0' && basec <= '9') || basec == '-'))
+    {
+      f = TRUE;			/* there is a # arg */
+      n = 0;			/* start with a zero default */
+      mflag = 1;		/* current minus flag */
+      c = basec;		/* strip the META */
+      while ((c >= '0' && c <= '9') || (c == '-'))
+	{
+	  if (c == '-')
+	    {
+	      /* already hit a minus or digit? */
+	      if ((mflag == -1) || (n != 0))
+		break;
+	      mflag = -1;
+	    }
+	  else
+	    n = n * 10 + (c - '0');
+	  if ((n == 0) && (mflag == -1)) /* lonely - */
+	    mlwrite("Arg:");
+	  else
+	    mlwrite("Arg: %d", n * mflag);
+
+	  c = getkey();		/* get the next key */
+	}
+      n = n * mflag;		/* figure in the sign */
+    }
+  /* do ^U repeat argument processing */
+
+  if (c == (CTRL | 'U'))
+    {				/* ^U, start argument */
+      f = TRUE;
+      n = 4;			/* with argument of 4 */
+      mflag = 0;		 /* that can be discarded */
+      mlwrite("Arg: 4");
+      while (((c = getkey ()) >= '0')
+	     && ((c <= '9') || (c == (CTRL | 'U')) || (c == '-')))
+	{
+	  if (c == (CTRL | 'U'))
+	    n = n * 4;
+	  /*
+	   * If dash, and start of argument string, set arg.
+	   * to -1.  Otherwise, insert it.
+	   */
+	  else if (c == '-')
+	    {
+	      if (mflag)
+		break;
+	      n = 0;
+	      mflag = -1;
+	    }
+	  /*
+	   * If first digit entered, replace previous argument
+	   * with digit and set sign.  Otherwise, append to arg.
+	   */
+	  else
+	    {
+	      if (!mflag)
+		{
+		  n = 0;
+		  mflag = 1;
+		}
+	      n = 10 * n + c - '0';
+	    }
+	  mlwrite("Arg: %d", (mflag >= 0) ? n : (n ? -n : -1));
+	}
+      /*
+       * Make arguments preceded by a minus sign negative and change
+       * the special argument "^U -" to an effective "^U -1".
+       */
+      if (mflag == -1)
+	{
+	  if (n == 0)
+	    n++;
+	  n = -n;
+	}
+    }
+
+  if (c == (CTRL | 'X'))       /* ^X is a prefix */
+    c = CTLX | getctl ();
+  if (kbdmip != NULL)
+    {				 /* Save macro strokes */
+      if (c != (CTLX | ')') && kbdmip > &kbdm[NKBDM - 6])
+	{
+	  ctrlg(FALSE, 0);
+	  goto loop;
+	}
+      if (f != FALSE)
+	{
+	  *kbdmip++ = (CTRL | 'U');
+	  *kbdmip++ = n;
+	}
+      *kbdmip++ = c;
+    }
+  execute(c, f, n);	       /* Do it */
+  goto loop;
+}
+
+/*
+ * Initialize all of the buffers and windows. The buffer name is passed down
+ * as an argument, because the main routine may have been told to read in a
+ * file by default, and we want the buffer name to be right.
+ */
+void edinit(char bname[])
+{
+  BUFFER *bp;
+  WINDOW *wp;
+
+  bp = bfind(bname, TRUE, 0);	/* First buffer */
+  blistp = bfind("[List]", TRUE, BFTEMP); /* Buffer list buffer */
+  wp = (WINDOW *) malloc(sizeof(WINDOW)); /* First window */
+  if (bp == NULL || wp == NULL || blistp == NULL)
+    exit (1);
+  curbp = bp;			/* Make this current */
+  wheadp = wp;
+  curwp = wp;
+  wp->w_wndp = NULL;		/* Initialize window */
+  wp->w_bufp = bp;
+  bp->b_nwnd = 1;		/* Displayed */
+  wp->w_linep = bp->b_linep;
+  wp->w_dotp = bp->b_linep;
+  wp->w_doto = 0;
+  wp->w_markp = NULL;
+  wp->w_marko = 0;
+  wp->w_toprow = 0;
+  wp->w_ntrows = term.t_nrow - 1; /* "-1" for mode line */
+  wp->w_force = 0;
+  wp->w_flag = WFMODE | WFHARD;	/* Full */
+}
+
+/*
+ * This is the general command execution routine. It handles the fake binding
+ * of all the keys to "self-insert". It also clears out the "thisflag" word,
+ * and arranges to move it to the "lastflag", so that the next command can
+ * look at it. Return the status of command.
+ */
+int execute(int c, int f, int n)
+{
+  KEYTAB *ktp;
+  int status;
+
+  ktp = &keytab[0];	       /* Look in key table */
+  while (ktp->k_fp != NULL)
+    {
+      if (ktp->k_code == c)
+	{
+	  thisflag = 0;
+	  status = (*ktp->k_fp) (f, n);
+	  lastflag = thisflag;
+	  return (status);
+	}
+      ++ktp;
+    }
+
+  if ((c >= 0x20 && c <= 0x7E)	/* Self inserting */
+      || (c >= 0xA0 && c <= 0xFE))
+    {
+      if (n <= 0)
+	{			/* Fenceposts */
+	  lastflag = 0;
+	  return (n < 0 ? FALSE : TRUE);
+	}
+      thisflag = 0;		/* For the future */
+
+      status = linsert(n, c);
+
+      lastflag = thisflag;
+      return (status);
+    }
+  mlwrite("\007[Key not bound]"); /* complain */
+  lastflag = 0;			/* Fake last flags */
+  return (FALSE);
+}
+
+/*
+ * Read in a key. Do the standard keyboard preprocessing. Convert the keys to
+ * the internal character set.
+ */
+int getkey()
+{
+  int c;
+
+  c = (*term.t_getchar) ();
+
+  if (c == METACH)
+    {				/* Apply M- prefix */
+      c = getctl ();
+      return (META | c);
+    }
+  if (c >= 0x00 && c <= 0x1F)	/* C0 control -> C- */
+    c = CTRL | (c + '@');
+  return (c);
+}
+
+/*
+ * Get a key. Apply control modifications to the read key.
+ */
+int getctl()
+{
+  int c;
+
+  c = (*term.t_getchar) ();
+  if (c >= 'a' && c <= 'z')	/* Force to upper */
+    c -= 0x20;
+  if (c >= 0x00 && c <= 0x1F)	/* C0 control -> C- */
+    c = CTRL | (c + '@');
+  return (c);
+}
+
+/*
+ * Fancy quit command, as implemented by Norm. If any buffer has changed
+ * do a write on that buffer and exit emacs, otherwise simply exit.
+ */
+int quickexit(int f, int n)
+{
+  BUFFER *bp;			/* scanning pointer to buffers */
+
+  bp = bheadp;
+  while (bp != NULL)
+    {
+      if ((bp->b_flag & BFCHG) != 0 /* Changed */
+	  && (bp->b_flag & BFTEMP) == 0)
+	{			/* Real */
+	  curbp = bp;		/* make that buffer current */
+	  mlwrite("[Saving %s]", (int*)bp->b_fname);
+	  filesave(f, n);
+	}
+      bp = bp->b_bufp;		/* on to the next buffer */
+    }
+  return quit(f, n);		/* conditionally quit */
+}
+
+/*
+ * Quit command. If an argument, always quit. Otherwise confirm if a buffer
+ * has been changed and not written out. Normally bound to "C-X C-C".
+ */
+int quit(int f, int n)
+{
+  int s;
+
+  if (f != FALSE	       /* Argument forces it */
+      || anycb () == FALSE     /* All buffers clean */
+      || (s = mlyesno("Modified buffers exist. Leave anyway")) == TRUE)
+    {
+      vttidy();
+      exit (0);
+    }
+  mlwrite("");
+  return (s);
+}
+
+/*
+ * Begin a keyboard macro. Error if not at the top level in keyboard
+ * processing. Set up variables and return.
+ */
+int ctlxlp(int f, int n)
+{
+  if (kbdmip != NULL || kbdmop != NULL)
+    {
+      mlwrite("Not now");
+      return (FALSE);
+    }
+  mlwrite("[Start macro]");
+  kbdmip = &kbdm[0];
+  return (TRUE);
+}
+
+/*
+ * End keyboard macro. Check for the same limit conditions as the above
+ * routine. Set up the variables and return to the caller.
+ */
+int ctlxrp(int f, int n)
+{
+  if (kbdmip == NULL)
+    {
+      mlwrite("Not now");
+      return (FALSE);
+    }
+  mlwrite("[End macro]");
+  kbdmip = NULL;
+  return (TRUE);
+}
+
+/*
+ * Execute a macro. The command argument is the number of times to loop. Quit
+ * as soon as a command gets an error. Return TRUE if all ok, else FALSE.
+ */
+int ctlxe(int f, int n)
+{
+  int c, af, an, s;
+
+  if (kbdmip != NULL || kbdmop != NULL)
+    {
+      mlwrite("No macro defined");
+      return (FALSE);
+    }
+  if (n <= 0)
+    return (TRUE);
+  do
+    {
+      kbdmop = &kbdm[0];
+      do
+	{
+	  af = FALSE;
+	  an = 1;
+	  if ((c = *kbdmop++) == (CTRL | 'U'))
+	    {
+	      af = TRUE;
+	      an = *kbdmop++;
+	      c = *kbdmop++;
+	    }
+	  s = TRUE;
+	}
+      while (c != (CTLX | ')') && (s = execute(c, af, an)) == TRUE);
+      kbdmop = NULL;
+    }
+  while (s == TRUE && --n);
+  return (s);
+}
+
+/*
+ * Abort. Beep the beeper. Kill off any keyboard macro, etc., that is in
+ * progress. Sometimes called as a routine, to do general aborting of stuff.
+ */
+int ctrlg(int f, int n)
+{
+  (*term.t_beep) ();
+  if (kbdmip != NULL)
+    {
+      kbdm[0] = (CTLX | ')');
+      kbdmip = NULL;
+    }
+  mlwrite("[Aborted]");
+  return (ABORT);
+}
+
+/*
+ * Handle ANSI escape-extended commands (with "ESC [" or "ESC O" prefix)
+ */
+int extendedcmd(int f, int n)
+{
+  int (*cmd)();
+  int c;
+
+  c = getctl();
+  switch (c)
+    {
+    case 'A': cmd = backline; break;
+    case 'B': cmd = forwline; break;
+    case 'C': cmd = forwchar; break;
+    case 'D': cmd = backchar; break;
+    case 'H': cmd = gotobob; break;
+    case 'W': cmd = gotoeob; break;
+    case '5': cmd = pageup; getctl(); break;
+    case '6': cmd = pagedown; getctl(); break;
+    case '7': cmd = gotobob; getctl(); break;
+    case '8': cmd = gotoeob; getctl(); break;
+    default: mlwrite("\007[Key not bound]");
+      return (FALSE);
+    }
+  return cmd(f, n);
+}

src/cmd/emg/random.c

@@ -0,0 +1,290 @@
+/* This file is in the public domain. */
+
+/*
+ * This file contains the command processing functions for a number of random
+ * commands. There is no functional grouping here, for sure.
+ */
+
+#include "estruct.h"
+#include "edef.h"
+
+extern void mlwrite();
+extern void lchange(int flag);
+extern int lnewline();
+extern int linsert(int n, int c);
+extern int backchar(int f, int n);
+extern void kdelete();
+extern int ldelete(int f, int n);
+extern int kremove(int k);
+
+int setfillcol(int f, int n);
+int getccol(int bflg);
+int twiddle(int f, int n);
+int quote(int f, int n);
+int tab(int f, int n);
+int openline(int f, int n);
+int newline(int f, int n);
+int forwdel(int f, int n);
+int backdel(int f, int n);
+int killtext(int f, int n);
+int yank(int f, int n);
+
+/*
+ * Set fill column to n.
+ */
+int setfillcol(int f, int n)
+{
+  fillcol = n;
+  mlwrite("[Fill column is %d]", n);
+  return (TRUE);
+}
+
+/*
+ * Return current column.  Stop at first non-blank given TRUE argument.
+ */
+int getccol(int bflg)
+{
+  int c, i, col;
+
+  col = 0;
+  for (i = 0; i < curwp->w_doto; ++i)
+    {
+      c = lgetc(curwp->w_dotp, i);
+      if (c != ' ' && c != '\t' && bflg)
+	break;
+      if (c == '\t')
+	col |= 0x07;
+      else if (c < 0x20 || c == 0x7F)
+	++col;
+      ++col;
+    }
+  return (col);
+}
+
+/*
+ * Twiddle the two characters on either side of dot. If dot is at the end of
+ * the line twiddle the two characters before it. Return with an error if dot
+ * is at the beginning of line; it seems to be a bit pointless to make this
+ * work. This fixes up a very common typo with a single stroke. Normally bound
+ * to "C-T". This always works within a line, so "WFEDIT" is good enough
+ */
+int twiddle(int f, int n)
+{
+  LINE *dotp;
+  int doto, cl, cr;
+
+  dotp = curwp->w_dotp;
+  doto = curwp->w_doto;
+  if (doto == llength(dotp) && --doto < 0)
+    return (FALSE);
+  cr = lgetc(dotp, doto);
+  if (--doto < 0)
+    return (FALSE);
+  cl = lgetc(dotp, doto);
+  lputc(dotp, doto + 0, cr);
+  lputc(dotp, doto + 1, cl);
+  lchange(WFEDIT);
+  return (TRUE);
+}
+
+/*
+ * Quote the next character, and insert it into the buffer. All the characters
+ * are taken literally, with the exception of the newline, which always has
+ * its line splitting meaning. The character is always read, even if it is
+ * inserted 0 times, for regularity. Bound to "C-Q"
+ */
+int quote(int f, int n)
+{
+  int s, c;
+
+  c = (*term.t_getchar) ();
+  if (n < 0)
+    return (FALSE);
+  if (n == 0)
+    return (TRUE);
+  if (c == '\n')
+    {
+      do
+	{
+	  s = lnewline();
+	}
+      while (s == TRUE && --n);
+      return (s);
+    }
+  return (linsert(n, c));
+}
+
+/*
+ * Insert a tab into file.
+ * Bound to "C-I"
+ */
+int tab(int f, int n)
+{
+  if (n < 0)
+    return (FALSE);
+  return (linsert(n, 9));
+}
+
+/*
+ * Open up some blank space. The basic plan is to insert a bunch of newlines,
+ * and then back up over them. Everything is done by the subcommand
+ * processors. They even handle the looping. Normally this is bound to "C-O"
+ */
+int openline(int f, int n)
+{
+  int i, s;
+
+  if (n < 0)
+    return (FALSE);
+  if (n == 0)
+    return (TRUE);
+  i = n;			/* Insert newlines */
+  do
+    {
+      s = lnewline();
+    }
+  while (s == TRUE && --i);
+  if (s == TRUE)		/* Then back up overtop */
+    s = backchar(f, n);		/* of them all */
+  return (s);
+}
+
+/*
+ * Insert a newline. Bound to "C-M".
+ */
+int newline(int f, int n)
+{
+  int s;
+
+  if (n < 0)
+    return (FALSE);
+
+  /* insert some lines */
+  while (n--)
+    {
+      if ((s = lnewline()) != TRUE)
+	return (s);
+    }
+  return (TRUE);
+}
+
+/*
+ * Delete forward. This is real easy, because the basic delete routine does
+ * all of the work. Watches for negative arguments, and does the right thing.
+ * If any argument is present, it kills rather than deletes, to prevent loss
+ * of text if typed with a big argument. Normally bound to "C-D"
+ */
+int forwdel(int f, int n)
+{
+  if (n < 0)
+    return (backdel(f, -n));
+  if (f != FALSE)
+    {			       /* Really a kill */
+      if ((lastflag & CFKILL) == 0)
+	kdelete();
+      thisflag |= CFKILL;
+    }
+  return (ldelete(n, f));
+}
+
+/*
+ * Delete backwards. This is quite easy too, because it's all done with other
+ * functions. Just move the cursor back, and delete forwards. Like delete
+ * forward, this actually does a kill if presented with an argument. Bound to
+ * both "RUBOUT" and "C-H"
+ */
+int backdel(int f, int n)
+{
+  int s;
+
+  if (n < 0)
+    return (forwdel(f, -n));
+  if (f != FALSE)
+    {			       /* Really a kill */
+      if ((lastflag & CFKILL) == 0)
+	kdelete();
+      thisflag |= CFKILL;
+    }
+  if ((s = backchar(f, n)) == TRUE)
+    s = ldelete(n, f);
+  return (s);
+}
+
+/*
+ * Kill text. If called without an argument, it kills from dot to the end of
+ * the line, unless it is at the end of the line, when it kills the newline.
+ * If called with an argument of 0, it kills from the start of the line to
+ * dot. If called with a positive argument, it kills from dot forward over
+ * that number of newlines. If called with a negative argument it kills
+ * backwards that number of newlines. Normally bound to "C-K"
+ */
+int killtext(int f, int n)
+{
+  LINE *nextp;
+  int chunk;
+
+  if ((lastflag & CFKILL) == 0)/* Clear kill buffer if last wasn't a kill */
+    kdelete();
+  thisflag |= CFKILL;
+  if (f == FALSE)
+    {
+      chunk = llength(curwp->w_dotp) - curwp->w_doto;
+      if (chunk == 0)
+	chunk = 1;
+    }
+  else if (n == 0)
+    {
+      chunk = curwp->w_doto;
+      curwp->w_doto = 0;
+    }
+  else if (n > 0)
+    {
+      chunk = llength(curwp->w_dotp) - curwp->w_doto + 1;
+      nextp = lforw(curwp->w_dotp);
+      while (--n)
+	{
+	  if (nextp == curbp->b_linep)
+	    return (FALSE);
+	  chunk += llength(nextp) + 1;
+	  nextp = lforw(nextp);
+	}
+    }
+  else
+    {
+      mlwrite("neg kill");
+      return (FALSE);
+    }
+  return (ldelete(chunk, TRUE));
+}
+
+/*
+ * Yank text back from the kill buffer. This is really easy. All of the work
+ * is done by the standard insert routines. All you do is run the loop, and
+ * check for errors. Bound to "C-Y"
+ */
+int yank(int f, int n)
+{
+  int c, i;
+
+  if (n < 0)
+    return (FALSE);
+  while (n--)
+    {
+      i = 0;
+      while ((c = kremove(i)) >= 0)
+	{
+	  if (c == '\n')
+	    {
+	      if (lnewline(FALSE, 1) == FALSE)
+		return (FALSE);
+	    }
+	  else
+	    {
+	      if (linsert(1, c) == FALSE)
+		return (FALSE);
+	    }
+	  ++i;
+	}
+    }
+  return (TRUE);
+}

src/cmd/emg/region.c

@@ -0,0 +1,142 @@
+/* This file is in the public domain. */
+
+/*
+ * The routines in this file deal with the region, that magic space between
+ * "." and mark. Some functions are commands. Some functions are just for
+ * internal use
+ */
+
+#include "estruct.h"
+#include "edef.h"
+
+extern void kdelete();
+extern int ldelete(int f, int n);
+extern int kinsert(int c);
+extern void mlwrite();
+
+int killregion(int f, int n);
+int copyregion(int f, int n);
+int getregion(REGION *rp);
+
+/*
+ * Kill the region. Ask "getregion" to figure out the bounds of the region.
+ * Move "." to the start, and kill the characters. Bound to "C-W"
+ */
+int killregion(int f, int n)
+{
+  REGION region;
+  int s;
+
+  if ((s = getregion(&region)) != TRUE)
+    return (s);
+  if ((lastflag & CFKILL) == 0) /* This is a kill type */
+    kdelete();			/* command, so do magic */
+  thisflag |= CFKILL;		/* kill buffer stuff */
+  curwp->w_dotp = region.r_linep;
+  curwp->w_doto = region.r_offset;
+  return (ldelete(region.r_size, TRUE));
+}
+
+/*
+ * Copy all of the characters in the region to the kill buffer. Don't move dot
+ * at all. This is a bit like a kill region followed by a yank. Bound to "M-W"
+ */
+int copyregion(int f, int n)
+{
+  LINE *linep;
+  REGION region;
+  int loffs, s;
+
+  if ((s = getregion(&region)) != TRUE)
+    return (s);
+  if ((lastflag & CFKILL) == 0) /* Kill type command */
+    kdelete();
+  thisflag |= CFKILL;
+  linep = region.r_linep;	/* Current line */
+  loffs = region.r_offset;	/* Current offset */
+  while (region.r_size--)
+    {
+      if (loffs == llength(linep))
+	{			/* End of line */
+	  if ((s = kinsert('\n')) != TRUE)
+	    return (s);
+	  linep = lforw(linep);
+	  loffs = 0;
+	}
+      else
+	{			/* Middle of line */
+	  if ((s = kinsert(lgetc(linep, loffs))) != TRUE)
+	    return (s);
+	  ++loffs;
+	}
+    }
+  return (TRUE);
+}
+
+/*
+ * This routine figures out the bounds of the region in the current window,
+ * and fills in the fields of the "REGION" structure pointed to by "rp".
+ * Because the dot and mark are usually very close together, we scan outward
+ * from dot looking for mark. This should save time. Return a standard code.
+ * Callers of this routine should be prepared to get an "ABORT" status; we
+ * might make this have the conform thing later
+ */
+int getregion(REGION *rp)
+{
+  LINE *flp, *blp;
+  int fsize, bsize;
+
+  if (curwp->w_markp == (struct LINE*)0)
+    {
+      mlwrite("No mark set in this window");
+      return (FALSE);
+    }
+  if (curwp->w_dotp == curwp->w_markp)
+    {
+      rp->r_linep = curwp->w_dotp;
+      if (curwp->w_doto < curwp->w_marko)
+	{
+	  rp->r_offset = curwp->w_doto;
+	  rp->r_size = curwp->w_marko - curwp->w_doto;
+	}
+      else
+	{
+	  rp->r_offset = curwp->w_marko;
+	  rp->r_size = curwp->w_doto - curwp->w_marko;
+	}
+      return (TRUE);
+    }
+  blp = curwp->w_dotp;
+  bsize = curwp->w_doto;
+  flp = curwp->w_dotp;
+  fsize = llength(flp) - curwp->w_doto + 1;
+  while (flp != curbp->b_linep || lback(blp) != curbp->b_linep)
+    {
+      if (flp != curbp->b_linep)
+	{
+	  flp = lforw(flp);
+	  if (flp == curwp->w_markp)
+	    {
+	      rp->r_linep = curwp->w_dotp;
+	      rp->r_offset = curwp->w_doto;
+	      rp->r_size = fsize + curwp->w_marko;
+	      return (TRUE);
+	    }
+	  fsize += llength(flp) + 1;
+	}
+      if (lback(blp) != curbp->b_linep)
+	{
+	  blp = lback(blp);
+	  bsize += llength(blp) + 1;
+	  if (blp == curwp->w_markp)
+	    {
+	      rp->r_linep = blp;
+	      rp->r_offset = curwp->w_marko;
+	      rp->r_size = bsize - curwp->w_marko;
+	      return (TRUE);
+	    }
+	}
+    }
+  mlwrite("Bug: lost mark");
+  return (FALSE);
+}

src/cmd/emg/search.c

@@ -0,0 +1,383 @@
+/* This file is in the public domain. */
+
+/*
+ * The functions in this file implement commands that search in the forward
+ * and backward directions. There are no special characters in the search
+ * strings
+ */
+
+#include <string.h>		/* strncpy(3), strncat(3) */
+#include "estruct.h"
+#include "edef.h"
+
+extern void mlwrite();
+extern int mlreplyt(char *prompt, char *buf, int nbuf, char eolchar);
+extern void update();
+extern int forwchar(int f, int n);
+extern int ldelete(int n, int kflag);
+extern int lnewline();
+extern int linsert(int n, int c);
+
+int forwsearch(int f, int n);
+int forwhunt(int f, int n);
+int backsearch(int f, int n);
+int backhunt(int f, int n);
+int bsearch(int f, int n);
+int eq(int bc, int pc);
+int readpattern(char *prompt);
+int forscan(char *patrn, int leavep);
+void expandp(char *srcstr, char *deststr, int maxlength);
+
+#define	PTBEG	1		/* leave the point at the begining on search */
+#define	PTEND	2		/* leave the point at the end on search */
+
+/*
+ * Search forward. Get a search string from the user, and search, beginning at
+ * ".", for the string. If found, reset the "." to be just after the match
+ * string, and [perhaps] repaint the display. Bound to "C-S"
+ */
+int forwsearch(int f, int n)
+{
+  int status;
+  int curline = curwp->w_dotline;
+
+  if (n == 0)			/* resolve the repeat count */
+    n = 1;
+  if (n < 1)			/* search backwards */
+    return (backsearch(f, -n));
+
+  /* ask the user for the text of a pattern */
+  if ((status = readpattern("Search")) != TRUE)
+    return (status);
+
+  /* search for the pattern */
+  while (n-- > 0)
+    {
+      if ((status = forscan(&pat[0], PTEND)) == FALSE)
+	break;
+    }
+
+  /* and complain if not there */
+  if (status == FALSE) {
+    mlwrite("Not found");
+    curwp->w_dotline = curline;
+  }
+  return (status);
+}
+
+int forwhunt(int f, int n)
+{
+  int status = 0;
+  int curline = curwp->w_dotline;
+
+  /* resolve the repeat count */
+  if (n == 0)
+    n = 1;
+  if (n < 1)			/* search backwards */
+    return (backhunt(f, -n));
+
+  /* Make sure a pattern exists */
+  if (pat[0] == 0)
+    {
+      mlwrite("No pattern set");
+      return (FALSE);
+    }
+  /* search for the pattern */
+  while (n-- > 0)
+    {
+      if ((status = forscan(&pat[0], PTEND)) == FALSE)
+	break;
+    }
+
+  /* and complain if not there */
+  if (status == FALSE) {
+    mlwrite("Not found");
+    curwp->w_dotline = curline;
+  }
+  return (status);
+}
+
+/*
+ * Reverse search. Get a search string from the user, and search, starting at
+ * "." and proceeding toward the front of the buffer. If found "." is left
+ * pointing at the first character of the pattern [the last character that was
+ * matched]. Bound to "C-R"
+ */
+int backsearch(int f, int n)
+{
+  int s;
+
+  if (n == 0)			/* resolve null and negative arguments */
+    n = 1;
+  if (n < 1)
+    return (forwsearch(f, -n));
+
+  if ((s = readpattern("Reverse search")) != TRUE)	/* get a pattern to search */
+    return (s);
+
+  return bsearch(f, n);		/* and go search for it */
+}
+
+/* hunt backward for the last search string entered
+ */
+int backhunt(int f, int n)
+{
+  if (n == 0)			/* resolve null and negative arguments */
+    n = 1;
+  if (n < 1)
+    return (forwhunt(f, -n));
+
+  if (pat[0] == 0)		/* Make sure a pattern exists */
+    {
+      mlwrite("No pattern set");
+      return (FALSE);
+    }
+  return bsearch(f, n);		/* go search */
+}
+
+int bsearch(int f, int n)
+{
+  LINE *clp, *tlp;
+  char *epp, *pp;
+  int cbo, tbo, c;
+  int curline = curwp->w_dotline;
+
+  /* find a pointer to the end of the pattern */
+  for (epp = &pat[0]; epp[1] != 0; ++epp)
+    ;
+
+  /* make local copies of the starting location */
+  clp = curwp->w_dotp;
+  cbo = curwp->w_doto;
+
+  while (n-- > 0)
+    {
+      for (;;)
+	{
+	  /* if we are at the begining of the line, wrap back around */
+	  if (cbo == 0)
+	    {
+	      clp = lback(clp);
+	      curwp->w_dotline--;
+
+	      if (clp == curbp->b_linep)
+		{
+		  mlwrite("Not found");
+		  curwp->w_dotline = curline;
+		  return (FALSE);
+		}
+	      cbo = llength(clp) + 1;
+	    }
+	  /* fake the <NL> at the end of a line */
+	  if (--cbo == llength(clp))
+	    c = '\n';
+	  else
+	    c = lgetc(clp, cbo);
+
+	  /* check for a match against the end of the pattern */
+	  if (eq(c, *epp) != FALSE)
+	    {
+	      tlp = clp;
+	      tbo = cbo;
+	      pp = epp;
+	      /* scanning backwards through the rest of the pattern
+	       * looking for a match */
+	      while (pp != &pat[0])
+		{
+		  /* wrap across a line break */
+		  if (tbo == 0)
+		    {
+		      tlp = lback(tlp);
+		      curwp->w_dotline--;
+		      if (tlp == curbp->b_linep)
+			goto fail;
+
+		      tbo = llength(tlp) + 1;
+		    }
+		  /* fake the <NL> */
+		  if (--tbo == llength(tlp))
+		    c = '\n';
+		  else
+		    c = lgetc(tlp, tbo);
+
+		  if (eq(c, *--pp) == FALSE)
+		    goto fail;
+		}
+
+	      /* A Match!  reset the current cursor */
+	      curwp->w_dotp = tlp;
+	      curwp->w_doto = tbo;
+	      curwp->w_flag |= WFMOVE;
+	      goto next;
+	    }
+	fail:;
+	}
+    next:;
+    }
+  return (TRUE);
+}
+
+/*
+ * Compare two characters. The "bc" comes from the buffer. It has it's case
+ * folded out. The "pc" is from the pattern
+ */
+int eq(int bc, int pc)
+{
+  if (bc >= 'a' && bc <= 'z')
+    bc -= 0x20;
+  if (pc >= 'a' && pc <= 'z')
+    pc -= 0x20;
+  if (bc == pc)
+    return (TRUE);
+  return (FALSE);
+}
+
+/*
+ * Read a pattern. Stash it in the external variable "pat". The "pat" is not
+ * updated if the user types in an empty line. If the user typed an empty
+ * line, and there is no old pattern, it is an error. Display the old pattern,
+ * in the style of Jeff Lomicka. There is some do-it-yourself control
+ * expansion.
+ */
+int readpattern(char *prompt)
+{
+  char tpat[NPAT + 20];
+  int s;
+
+  strncpy(tpat, prompt, NPAT-12); /* copy prompt to output string */
+  strncat(tpat, " [", 3);	/* build new prompt string */
+  expandp(&pat[0], &tpat[strlen (tpat)], NPAT / 2); /* add old pattern */
+  strncat(tpat, "]: ", 4);
+
+  s = mlreplyt(tpat, tpat, NPAT, 10); /* Read pattern */
+
+  if (s == TRUE)		/* Specified */
+    strncpy(pat, tpat, NPAT);
+  else if (s == FALSE && pat[0] != 0) /* CR, but old one */
+    s = TRUE;
+
+  return (s);
+}
+
+/* search forward for a <patrn>
+ */
+int forscan(char *patrn, int leavep)
+{
+  LINE *curline;		/* current line during scan */
+  LINE *lastline;		/* last line position during scan */
+  LINE *matchline;		/* current line during matching */
+  char *patptr;			/* pointer into pattern */
+  int curoff;			/* position within current line */
+  int lastoff;			/* position within last line */
+  int c;			/* character at current position */
+  int matchoff;			/* position in matching line */
+
+  /* setup local scan pointers to global "." */
+  curline = curwp->w_dotp;
+  curoff = curwp->w_doto;
+
+  /* scan each character until we hit the head link record */
+  while (curline != curbp->b_linep)
+    {
+      /* save the current position in case we need to restore it on a match */
+      lastline = curline;
+      lastoff = curoff;
+
+      /* get the current character resolving EOLs */
+      if (curoff == llength(curline))
+	{			/* if at EOL */
+	  curline = lforw(curline); /* skip to next line */
+	  curwp->w_dotline++;
+	  curoff = 0;
+	  c = '\n';		/* and return a <NL> */
+	}
+      else
+	c = lgetc(curline, curoff++); /* get the char */
+
+      /* test it against first char in pattern */
+      if (eq(c, patrn[0]) != FALSE) /* if we find it. */
+	{
+	  /* setup match pointers */
+	  matchline = curline;
+	  matchoff = curoff;
+	  patptr = &patrn[0];
+
+	  /* scan through patrn for a match */
+	  while (*++patptr != 0)
+	    {
+	      /* advance all the pointers */
+	      if (matchoff == llength(matchline))
+		{
+		  /* advance past EOL */
+		  matchline = lforw(matchline);
+		  curwp->w_dotline++;
+		  matchoff = 0;
+		  c = '\n';
+		}
+	      else
+		c = lgetc(matchline, matchoff++);
+
+	      /* and test it against the pattern */
+	      if (eq(*patptr, c) == FALSE)
+		goto fail;
+	    }
+
+	  /* A SUCCESSFULL MATCH!!! */
+	  /* reset the global "." pointers */
+	  if (leavep == PTEND)
+	    {			/* at end of string */
+	      curwp->w_dotp = matchline;
+	      curwp->w_doto = matchoff;
+	    }
+	  else
+	    {			/* at begining of string */
+	      curwp->w_dotp = lastline;
+	      curwp->w_doto = lastoff;
+	    }
+	  curwp->w_flag |= WFMOVE; /* flag that we have moved */
+	  return (TRUE);
+	}
+    fail:;			/* continue to search */
+    }
+  /* we could not find a match */
+  return (FALSE);
+}
+
+/* expandp: expand control key sequences for output
+ */
+void expandp(char *srcstr, char *deststr, int maxlength)
+{
+  char c;			/* current char to translate */
+
+  /* scan through the string */
+  while ((c = *srcstr++) != 0)
+    {
+      if (c < 0x20 || c == 0x7f)
+	{			/* control character */
+	  *deststr++ = '^';
+	  *deststr++ = c ^ 0x40;
+	  maxlength -= 2;
+	}
+      else if (c == '%')
+	{
+	  *deststr++ = '%';
+	  *deststr++ = '%';
+	  maxlength -= 2;
+	}
+      else
+	{			/* any other character */
+	  *deststr++ = c;
+	  maxlength--;
+	}
+
+      /* check for maxlength */
+      if (maxlength < 4)
+	{
+	  *deststr++ = '$';
+	  *deststr = '\0';
+	  return;
+	}
+    }
+  *deststr = '\0';
+  return;
+}

src/cmd/emg/tcap.c

@@ -0,0 +1,117 @@
+/* This file is in the public domain. */
+
+/* termios video driver */
+
+#define termdef 1	/* don't define "term" externally */
+
+#include <stdio.h>	/* puts(3), snprintf(3) */
+#include "estruct.h"
+#include "edef.h"
+#undef CTRL		/* Needs to be done here. */
+#include <sys/ioctl.h>
+
+extern int tgetent();
+extern char *tgetstr();
+extern char *tgoto();
+extern void tputs();
+
+extern char *getenv();
+extern void ttopen();
+extern int ttgetc();
+extern void ttputc();
+extern void ttflush();
+extern void ttclose();
+
+extern void panic();
+
+void getwinsize();
+void tcapopen();
+void tcapmove(int row, int col);
+void tcapeeol();
+void tcapeeop();
+void tcaprev();
+void tcapbeep();
+
+#define	MARGIN 8
+#define	SCRSIZ 64
+#define BEL 0x07
+#define TCAPSLEN 64
+
+char tcapbuf[TCAPSLEN];		/* capabilities actually used */
+char *CM, *CE, *CL, *SO, *SE;
+
+TERM term = {
+  0, 0, MARGIN, SCRSIZ, tcapopen, ttclose, ttgetc, ttputc,
+  ttflush, tcapmove, tcapeeol, tcapeeop, tcapbeep, tcaprev
+};
+
+void getwinsize()
+{
+  int cols = FORCE_COLS;
+  int rows = FORCE_ROWS;
+
+  /* Too small and we're out */
+  if ((cols < 10) || (rows < 3))
+      panic("Too few columns or rows");
+
+  if (FORCE_COLS > MAXCOL)
+      cols = MAXCOL;
+  if (FORCE_ROWS > MAXROW)
+      rows = MAXROW;
+
+  term.t_ncol = cols;
+  term.t_nrow = rows - 1;
+}
+
+void tcapopen()
+{
+  char tcbuf[1024];
+  char *p, *tv_stype;
+
+  if ((tv_stype = getenv("TERM")) == NULL)
+      panic("TERM not defined");
+  if ((tgetent(tcbuf, tv_stype)) != 1)
+      panic("Unknown terminal type");
+  p = tcapbuf;
+  CL = tgetstr("cl", &p);
+  CM = tgetstr("cm", &p);
+  CE = tgetstr("ce", &p);
+  SE = tgetstr("se", &p);
+  SO = tgetstr("so", &p);
+
+  if (CE == NULL)
+    eolexist = FALSE;
+  if (SO != NULL && SE != NULL)
+    revexist = TRUE;
+  if (CL == NULL || CM == NULL)
+      panic("Need cl & cm abilities");
+  if (p >= &tcapbuf[TCAPSLEN])	/* XXX */
+      panic("Description too big");
+  ttopen ();
+}
+
+void tcaprev(int state)
+{
+  if (revexist)
+    tputs((state ? SO : SE), 1, ttputc);
+}
+
+void tcapmove (int row, int col)
+{
+  tputs(tgoto(CM, col, row), 1, ttputc);
+}
+
+void tcapeeol()
+{
+  tputs(CE, 1, ttputc);
+}
+
+void tcapeeop()
+{
+  tputs(CL, 1, ttputc);
+}
+
+void tcapbeep()
+{
+  ttputc(BEL);
+}

src/cmd/emg/ttyio.c

@@ -0,0 +1,163 @@
+/* This file is in the public domain. */
+
+/*
+ * This file comes from mg1a.
+ * Uses the panic function from OpenBSD's mg.
+ */
+
+/*
+ *		Ultrix-32 and Unix terminal I/O.
+ * The functions in this file
+ * negotiate with the operating system for
+ * keyboard characters, and write characters to
+ * the display in a barely buffered fashion.
+ */
+
+#include <stdio.h>
+#include <sgtty.h>
+#include <stdlib.h>
+#include <term.h>
+#include <unistd.h>
+#undef CTRL
+#include "estruct.h"
+
+void ttflush(void);
+void panic(char *);
+
+extern void getwinsize();
+
+#define NROW	66			/* Rows.			*/
+#define NCOL	132			/* Columns.			*/
+#define	NOBUF	512			/* Output buffer size.		*/
+
+char	obuf[NOBUF];			/* Output buffer.		*/
+int	nobuf;
+struct	sgttyb	oldtty;			/* V6/V7 stty data.		*/
+struct	sgttyb	newtty;
+struct	tchars	oldtchars;		/* V7 editing.			*/
+struct	tchars	newtchars;
+struct	ltchars oldltchars;		/* 4.2 BSD editing.		*/
+struct	ltchars	newltchars;
+
+/*
+ * This function gets called once, to set up
+ * the terminal channel.
+ */
+void ttopen(void) {
+        register char *tv_stype;
+        char *getenv(), *tgetstr(), tcbuf[1024];
+
+	if (ioctl(0, TIOCGETP, (char *) &oldtty) < 0)
+		panic("ttopen can't get sgtty");
+	newtty.sg_ospeed = oldtty.sg_ospeed;
+	newtty.sg_ispeed = oldtty.sg_ispeed;
+	newtty.sg_erase  = oldtty.sg_erase;
+	newtty.sg_kill   = oldtty.sg_kill;
+	newtty.sg_flags  = oldtty.sg_flags;
+	newtty.sg_flags &= ~(ECHO|CRMOD);	/* Kill echo, CR=>NL.	*/
+	newtty.sg_flags |= RAW|ANYP;		/* raw mode for 8 bit path.*/
+	if (ioctl(0, TIOCSETP, (char *) &newtty) < 0)
+		panic("ttopen can't set sgtty");
+	if (ioctl(0, TIOCGETC, (char *) &oldtchars) < 0)
+		panic("ttopen can't get chars");
+	newtchars.t_intrc  = 0xFF;		/* Interrupt.		*/
+	newtchars.t_quitc  = 0xFF;		/* Quit.		*/
+	newtchars.t_startc = 0xFF;		/* ^Q, for terminal.	*/
+	newtchars.t_stopc  = 0xFF;		/* ^S, for terminal.	*/
+	newtchars.t_eofc   = 0xFF;
+	newtchars.t_brkc   = 0xFF;
+	if (ioctl(0, TIOCSETC, (char *) &newtchars) < 0)
+		panic("ttopen can't set chars");
+	if (ioctl(0, TIOCGLTC, (char *) &oldltchars) < 0)
+		panic("ttopen can't get ltchars");
+	newltchars.t_suspc  = 0xFF;		/* Suspend #1.		*/
+	newltchars.t_dsuspc = 0xFF;		/* Suspend #2.		*/
+	newltchars.t_rprntc = 0xFF;
+	newltchars.t_flushc = 0xFF;		/* Output flush.	*/
+	newltchars.t_werasc = 0xFF;
+	newltchars.t_lnextc = 0xFF;		/* Literal next.	*/
+	if (ioctl(0, TIOCSLTC, (char *) &newltchars) < 0)
+		panic("ttopen can't set ltchars");
+
+/* do this the REAL way */
+        if ((tv_stype = getenv("TERM")) == NULL)
+                panic("TERM not defined");
+
+        if((tgetent(tcbuf, tv_stype)) != 1)
+                panic("Unknown terminal type");
+
+	getwinsize();
+}
+
+/*
+ * This function gets called just
+ * before we go back home to the shell. Put all of
+ * the terminal parameters back.
+ */
+void ttclose(void) {
+	ttflush();
+	if (ioctl(0, TIOCSLTC, (char *) &oldltchars) < 0)
+		panic("ttclose can't set ltchars");
+	if (ioctl(0, TIOCSETC, (char *) &oldtchars) < 0)
+		panic("ttclose can't set chars");
+	if (ioctl(0, TIOCSETP, (char *) &oldtty) < 0)
+		panic("ttclose can't set sgtty");
+}
+
+/*
+ * Write character to the display.
+ * Characters are buffered up, to make things
+ * a little bit more efficient.
+ */
+int ttputc(int c) {
+	if (nobuf >= NOBUF)
+		ttflush();
+	obuf[nobuf++] = c;
+	return (c);
+}
+
+/*
+ * Flush output.
+ */
+void ttflush(void) {
+	if (nobuf != 0) {
+		if (write(1, obuf, nobuf) != nobuf)
+			panic("ttflush write failed");
+		nobuf = 0;
+	}
+}
+
+/*
+ * Read character from terminal.
+ * All 8 bits are returned, so that you can use
+ * a multi-national terminal.
+ */
+int ttgetc(void) {
+	char buf[1];
+
+	while (read(0, &buf[0], 1) != 1);
+	return (buf[0] & 0xFF);
+}
+
+/*
+ * typeahead returns TRUE if there are characters available to be read
+ * in.
+ */
+int typeahead(void) {
+	int x;
+
+	return((ioctl(0, FIONREAD, (char *) &x) < 0) ? 0 : x);
+}
+
+/*
+ * panic - just exit, as quickly as we can.
+ * From OpenBSD's mg.
+ */
+void panic(char *s)
+{
+    ttclose();
+    (void) fputs("panic: ", stderr);
+    (void) fputs(s, stderr);
+    (void) fputc('\n', stderr);
+    exit(1);
+}

src/cmd/emg/window.c

@@ -0,0 +1,336 @@
+/* This file is in the public domain. */
+
+/*
+ * Window management. Some of the functions are internal, and some are
+ * attached to keys that the user actually types
+ */
+
+#include <stdlib.h>		/* free(3), malloc(3) */
+#include "estruct.h"
+#include "edef.h"
+
+extern void upmode();
+extern void mlwrite();
+
+int refresh(int f, int n);
+int nextwind(int f, int n);
+int prevwind(int f, int n);
+int onlywind(int f, int n);
+int splitwind(int f, int n);
+int enlargewind(int f, int n);
+int shrinkwind(int f, int n);
+WINDOW* wpopup();
+
+/*
+ * Refresh the screen. With no argument, it does the refresh and centers
+ * the cursor on the screen. With an argument it does a reposition instead.
+ * Bound to "C-L"
+ */
+int refresh(int f, int n)
+{
+  if (n >= 0)
+    n++;			/* adjust to screen row */
+  if (f == FALSE)
+    {
+      sgarbf = TRUE;
+      n = 0;			/* Center dot */
+    }
+  curwp->w_force = n;
+  curwp->w_flag |= WFFORCE;
+  return (TRUE);
+}
+
+/*
+ * The command make the next window (next => down the screen) the current
+ * window. There are no real errors, although the command does nothing if
+ * there is only 1 window on the screen. Bound to "C-X C-N"
+ */
+int nextwind(int f, int n)
+{
+  WINDOW *wp;
+
+  if ((wp = curwp->w_wndp) == NULL)
+    wp = wheadp;
+
+  curwp = wp;
+  curbp = wp->w_bufp;
+  upmode();
+  return (TRUE);
+}
+
+/*
+ * This command makes the previous window (previous => up the screen) the
+ * current window. There arn't any errors, although the command does not do a
+ * lot if there is 1 window
+ */
+int prevwind(int f, int n)
+{
+  WINDOW *wp1, *wp2;
+
+  wp1 = wheadp;
+  wp2 = curwp;
+
+  if (wp1 == wp2)
+    wp2 = NULL;
+
+  while (wp1->w_wndp != wp2)
+    wp1 = wp1->w_wndp;
+
+  curwp = wp1;
+  curbp = wp1->w_bufp;
+  upmode();
+  return (TRUE);
+}
+
+/*
+ * This command makes the current window the only window on the screen. Bound
+ * to "C-X 1". Try to set the framing so that "." does not have to move on the
+ * display. Some care has to be taken to keep the values of dot and mark in
+ * the buffer structures right if the distruction of a window makes a buffer
+ * become undisplayed
+ */
+int onlywind(int f, int n)
+{
+  WINDOW *wp;
+  LINE *lp;
+  int i;
+
+  while (wheadp != curwp)
+    {
+      wp = wheadp;
+      wheadp = wp->w_wndp;
+      if (--wp->w_bufp->b_nwnd == 0)
+	{
+	  wp->w_bufp->b_dotp = wp->w_dotp;
+	  wp->w_bufp->b_doto = wp->w_doto;
+	  wp->w_bufp->b_markp = wp->w_markp;
+	  wp->w_bufp->b_marko = wp->w_marko;
+	}
+      free((char *) wp);
+    }
+  while (curwp->w_wndp != NULL)
+    {
+      wp = curwp->w_wndp;
+      curwp->w_wndp = wp->w_wndp;
+      if (--wp->w_bufp->b_nwnd == 0)
+	{
+	  wp->w_bufp->b_dotp = wp->w_dotp;
+	  wp->w_bufp->b_doto = wp->w_doto;
+	  wp->w_bufp->b_markp = wp->w_markp;
+	  wp->w_bufp->b_marko = wp->w_marko;
+	}
+      free((char *) wp);
+    }
+  lp = curwp->w_linep;
+  i = curwp->w_toprow;
+  while (i != 0 && lback (lp) != curbp->b_linep)
+    {
+      --i;
+      lp = lback(lp);
+    }
+  curwp->w_toprow = 0;
+  curwp->w_ntrows = term.t_nrow - 1;
+  curwp->w_linep = lp;
+  curwp->w_flag |= WFMODE | WFHARD;
+  return (TRUE);
+}
+
+/*
+ * Split the current window. A window smaller than 3 lines cannot be split.
+ * The only other error that is possible is a "malloc" failure allocating the
+ * structure for the new window. Bound to "C-X 2"
+ */
+int splitwind(int f, int n)
+{
+  LINE *lp;
+  WINDOW *wp, *wp1, *wp2;
+  int ntru, ntrl, ntrd;
+
+  if (curwp->w_ntrows < 3)
+    {
+      mlwrite("Cannot split a %d line window", curwp->w_ntrows);
+      return (FALSE);
+    }
+  if ((wp = (WINDOW *) malloc(sizeof(WINDOW))) == NULL)
+    {
+      mlwrite("Cannot allocate WINDOW block");
+      return (FALSE);
+    }
+  ++curbp->b_nwnd;		/* Displayed twice */
+  wp->w_bufp = curbp;
+  wp->w_dotp = curwp->w_dotp;
+  wp->w_doto = curwp->w_doto;
+  wp->w_markp = curwp->w_markp;
+  wp->w_marko = curwp->w_marko;
+  wp->w_flag = 0;
+  wp->w_force = 0;
+  ntru = (curwp->w_ntrows - 1) / 2; /* Upper size */
+  ntrl = (curwp->w_ntrows - 1) - ntru; /* Lower size */
+  lp = curwp->w_linep;
+  ntrd = 0;
+  while (lp != curwp->w_dotp)
+    {
+      ++ntrd;
+      lp = lforw(lp);
+    }
+  lp = curwp->w_linep;
+  if (ntrd <= ntru)
+    {				/* Old is upper window */
+      if (ntrd == ntru)		/* Hit mode line */
+	lp = lforw(lp);
+      curwp->w_ntrows = ntru;
+      wp->w_wndp = curwp->w_wndp;
+      curwp->w_wndp = wp;
+      wp->w_toprow = curwp->w_toprow + ntru + 1;
+      wp->w_ntrows = ntrl;
+    }
+  else
+    {				/* Old is lower window */
+      wp1 = NULL;
+      wp2 = wheadp;
+      while (wp2 != curwp)
+	{
+	  wp1 = wp2;
+	  wp2 = wp2->w_wndp;
+	}
+      if (wp1 == NULL)
+	wheadp = wp;
+      else
+	wp1->w_wndp = wp;
+      wp->w_wndp = curwp;
+      wp->w_toprow = curwp->w_toprow;
+      wp->w_ntrows = ntru;
+      ++ntru;			/* Mode line */
+      curwp->w_toprow += ntru;
+      curwp->w_ntrows = ntrl;
+      while (ntru--)
+	lp = lforw (lp);
+    }
+  curwp->w_linep = lp;		/* Adjust the top lines */
+  wp->w_linep = lp;		/* if necessary */
+  curwp->w_flag |= WFMODE | WFHARD;
+  wp->w_flag |= WFMODE | WFHARD;
+  return (TRUE);
+}
+
+/*
+ * Enlarge the current window. Find the window that loses space. Make sure it
+ * is big enough. If so, hack the window descriptions, and ask redisplay to do
+ * all the hard work. You don't just set "force reframe" because dot would
+ * move. Bound to "C-X Z"
+ */
+int enlargewind(int f, int n)
+{
+  WINDOW *adjwp;
+  LINE *lp;
+  int i;
+
+  if (n < 0)
+    return (shrinkwind(f, -n));
+  if (wheadp->w_wndp == NULL)
+    {
+      mlwrite("Only one window");
+      return (FALSE);
+    }
+  if ((adjwp = curwp->w_wndp) == NULL)
+    {
+      adjwp = wheadp;
+      while (adjwp->w_wndp != curwp)
+	adjwp = adjwp->w_wndp;
+    }
+  if (adjwp->w_ntrows <= n)
+    {
+      mlwrite("Impossible change");
+      return (FALSE);
+    }
+  if (curwp->w_wndp == adjwp)
+    {				/* Shrink below */
+      lp = adjwp->w_linep;
+      for (i = 0; i < n && lp != adjwp->w_bufp->b_linep; ++i)
+	lp = lforw(lp);
+      adjwp->w_linep = lp;
+      adjwp->w_toprow += n;
+    }
+  else
+    {				/* Shrink above */
+      lp = curwp->w_linep;
+      for (i = 0; i < n && lback(lp) != curbp->b_linep; ++i)
+	lp = lback(lp);
+      curwp->w_linep = lp;
+      curwp->w_toprow -= n;
+    }
+  curwp->w_ntrows += n;
+  adjwp->w_ntrows -= n;
+  curwp->w_flag |= WFMODE | WFHARD;
+  adjwp->w_flag |= WFMODE | WFHARD;
+  return (TRUE);
+}
+
+/*
+ * Shrink the current window. Find the window that gains space. Hack at the
+ * window descriptions. Ask the redisplay to do all the hard work
+ */
+int shrinkwind(int f, int n)
+{
+  WINDOW *adjwp;
+  LINE *lp;
+  int i;
+
+  if (n < 0)
+    return (enlargewind(f, -n));
+  if (wheadp->w_wndp == NULL)
+    {
+      mlwrite("Only one window");
+      return (FALSE);
+    }
+  if ((adjwp = curwp->w_wndp) == NULL)
+    {
+      adjwp = wheadp;
+      while (adjwp->w_wndp != curwp)
+	adjwp = adjwp->w_wndp;
+    }
+  if (curwp->w_ntrows <= n)
+    {
+      mlwrite("Impossible change");
+      return (FALSE);
+    }
+  if (curwp->w_wndp == adjwp)
+    {				/* Grow below */
+      lp = adjwp->w_linep;
+      for (i = 0; i < n && lback(lp) != adjwp->w_bufp->b_linep; ++i)
+	lp = lback(lp);
+      adjwp->w_linep = lp;
+      adjwp->w_toprow -= n;
+    }
+  else
+    {				/* Grow above */
+      lp = curwp->w_linep;
+      for (i = 0; i < n && lp != curbp->b_linep; ++i)
+	lp = lforw(lp);
+      curwp->w_linep = lp;
+      curwp->w_toprow += n;
+    }
+  curwp->w_ntrows -= n;
+  adjwp->w_ntrows += n;
+  curwp->w_flag |= WFMODE | WFHARD;
+  adjwp->w_flag |= WFMODE | WFHARD;
+  return (TRUE);
+}
+
+/*
+ * Pick a window for a pop-up. Split the screen if there is only one window.
+ * Pick the uppermost window that isn't the current window. An LRU algorithm
+ * might be better. Return a pointer, or NULL on error
+ */
+WINDOW* wpopup()
+{
+  WINDOW *wp;
+
+  if (wheadp->w_wndp == NULL	/* Only 1 window */
+      && splitwind(FALSE, 0) == FALSE)	/* and it won't split */
+    return (NULL);
+  wp = wheadp;			/* Find window to use */
+  while (wp != NULL && wp == curwp)
+    wp = wp->w_wndp;
+  return (wp);
+}

src/cmd/emg/word.c

@@ -0,0 +1,90 @@
+/* This file is in the public domain. */
+
+/*
+ * The routines in this file implement commands that work word at a time.
+ * There are all sorts of word mode commands. If I do any sentence and/or
+ * paragraph mode commands, they are likely to be put in this file
+ */
+
+#include "estruct.h"
+#include "edef.h"
+
+extern int backchar(int f, int n);
+extern int forwchar(int f, int n);
+
+int backword(int f, int n);
+int forwword(int f, int n);
+int inword(void);
+
+/*
+ * Move the cursor backward by "n" words. All of the details of motion are
+ * performed by the "backchar" and "forwchar" routines. Error if you try to
+ * move beyond the buffers
+ */
+int backword(int f, int n)
+{
+  if (n < 0)
+    return (forwword(f, -n));
+  if (backchar(FALSE, 1) == FALSE)
+    return (FALSE);
+  while (n--)
+    {
+      while (inword() == FALSE)
+	{
+	  if (backchar(FALSE, 1) == FALSE)
+	    return (FALSE);
+	}
+      while (inword() != FALSE)
+	{
+	  if (backchar(FALSE, 1) == FALSE)
+	    return (FALSE);
+	}
+    }
+  return (forwchar(FALSE, 1));
+}
+
+/*
+ * Move the cursor forward by the specified number of words. All of the motion
+ * is done by "forwchar". Error if you try and move beyond the buffer's end
+ */
+int forwword(int f, int n)
+{
+  if (n < 0)
+    return (backword(f, -n));
+  while (n--)
+    {
+      while (inword() != FALSE)
+	{
+	  if (forwchar(FALSE, 1) == FALSE)
+	    return (FALSE);
+	}
+      while (inword() == FALSE)
+	{
+	  if (forwchar(FALSE, 1) == FALSE)
+	    return (FALSE);
+	}
+    }
+  return (TRUE);
+}
+
+/*
+ * Return TRUE if the character at dot is a character that is considered to be
+ * part of a word. The word character list is hard coded. Should be setable
+ */
+int inword(void)
+{
+  int c;
+
+  if (curwp->w_doto == llength(curwp->w_dotp))
+    return (FALSE);
+  c = lgetc(curwp->w_dotp, curwp->w_doto);
+  if (c >= 'a' && c <= 'z')
+    return (TRUE);
+  if (c >= 'A' && c <= 'Z')
+    return (TRUE);
+  if (c >= '0' && c <= '9')
+    return (TRUE);
+  if (c == '$' || c == '_')	/* For identifiers */
+    return (TRUE);
+  return (FALSE);
+}

src/cmd/fdisk/Makefile

@@ -32,7 +32,7 @@ depend:         ${SRCS}
 
 install:        all
 		install -m 755 $(BIN) ${DESTDIR}/sbin
-		install -m 755 $(MAN) ${DESTDIR}/share/man/cat8
+		cp $(MAN) ${DESTDIR}/share/man/cat8
 
 lint:           ${SRCS}
 		lint -hax ${SRCS}

src/cmd/levee/.gitignore

@@ -0,0 +1 @@
+lv

src/cmd/levee/Makefile

@@ -0,0 +1,56 @@
+#
+# Public Domain.  1995/03/13 - Steven Schultz
+#
+TOPSRC		= $(shell cd ../../..; pwd)
+include $(TOPSRC)/target.mk
+
+#CFLAGS		+= -Werror
+LIBS            += -ltermcap
+
+OBJS            = blockio.o display.o editcor.o exec.o find.o \
+                  unixcall.o globals.o insert.o main.o misc.o \
+                  modify.o move.o ucsd.o undo.o wildargs.o \
+                  version.o
+MAN             = lv.0
+
+all:            lv ${MAN}
+
+lv:             ${OBJS}
+		${CC} ${LDFLAGS} -o lv.elf ${OBJS} ${LIBS}
+		${OBJDUMP} -S lv.elf > lv.dis
+		${SIZE} lv.elf
+		${ELF2AOUT} lv.elf $@ && rm lv.elf
+
+version.o: version.c VERSION
+		$(CC) $(CFLAGS) -c -DVERSION=\"`cat VERSION`\" version.c
+
+.SUFFIXES:      .0 .1
+
+.1.0:
+		${MANROFF} $*.1 > $@
+
+clean:
+		rm -f *.o *.elf ${MAN} lv *.elf *.dis tags *~
+
+install:        all
+		install lv ${DESTDIR}/bin/
+		cp lv.0 ${DESTDIR}/share/man/cat1/
+
+# Dependencies
+
+blockio.o    : levee.h extern.h blockio.c config.h
+display.o    : levee.h extern.h termcap.i display.c config.h
+editcor.o    : levee.h extern.h editcor.c config.h
+exec.o       : levee.h extern.h exec.c config.h
+find.o       : levee.h extern.h grep.h find.c config.h
+globals.o    : levee.h globals.c config.h
+insert.o     : levee.h extern.h insert.c config.h
+main.o       : levee.h extern.h main.c config.h
+misc.o       : levee.h extern.h misc.c config.h
+modify.o     : levee.h extern.h grep.h modify.c config.h
+move.o       : levee.h extern.h move.c config.h
+rmxcall.o    : levee.h rmxcall.c config.h
+ucsd.o       : levee.h extern.h ucsd.c config.h
+undo.o       : levee.h extern.h undo.c config.h
+unixcall.o   : levee.h extern.h unixcall.c config.h
+wildargs.o   : levee.h extern.h wildargs.c config.h

src/cmd/levee/Makefile-linux

@@ -0,0 +1,56 @@
+# makefile for Levee
+
+exedir=/usr/local/bin
+mandir=/usr/local/man
+CC=cc
+
+CFLAGS=-g
+LDFLAGS=-g
+
+OBJS = blockio.o display.o editcor.o exec.o find.o \
+    unixcall.o globals.o insert.o main.o misc.o \
+    modify.o move.o ucsd.o undo.o wildargs.o \
+    version.o
+
+lev: $(OBJS)
+	$(CC) $(LDFLAGS) -o lev $(OBJS) -lcurses
+
+version.o: version.c VERSION
+	$(CC) $(CFLAGS) -c -DVERSION=\"`cat VERSION`\" version.c
+
+clean:
+	rm -f *.o lev
+
+distclean spotless: clean
+	rm -f Makefile config.cmd config.sub config.h config.mak config.log config.md
+
+install: install.bin install.man
+
+install.bin: lev
+	/home/sergev/Daily/workdir-2015-01-06/levee-3.5a/config.md $(PREFIX)$(exedir)
+	/usr/bin/install -s -m 755 lev $(PREFIX)$(exedir)/levee
+	/bin/ln -s -f levee $(PREFIX)$(exedir)/lv
+
+install.man:
+	/home/sergev/Daily/workdir-2015-01-06/levee-3.5a/config.md $(PREFIX)$(mandir)/man1
+	/usr/bin/install -m 444 lv.1 $(PREFIX)$(mandir)/man1/levee.1
+	echo ".so man1/levee.1" > $(PREFIX)$(mandir)/man1/lv.1
+
+# Dependencies
+
+blockio.o    : levee.h extern.h blockio.c config.h
+display.o    : levee.h extern.h termcap.i display.c config.h
+editcor.o    : levee.h extern.h editcor.c config.h
+exec.o       : levee.h extern.h exec.c config.h
+find.o       : levee.h extern.h grep.h find.c config.h
+globals.o    : levee.h globals.c config.h
+insert.o     : levee.h extern.h insert.c config.h
+main.o       : levee.h extern.h main.c config.h
+misc.o       : levee.h extern.h misc.c config.h
+modify.o     : levee.h extern.h grep.h modify.c config.h
+move.o       : levee.h extern.h move.c config.h
+rmxcall.o    : levee.h rmxcall.c config.h
+ucsd.o       : levee.h extern.h ucsd.c config.h
+undo.o       : levee.h extern.h undo.c config.h
+unixcall.o   : levee.h extern.h unixcall.c config.h
+wildargs.o   : levee.h extern.h wildargs.c config.h

src/cmd/levee/Makefile.in

@@ -0,0 +1,56 @@
+# makefile for Levee
+
+exedir=@exedir@
+mandir=@mandir@
+CC=@CC@
+
+CFLAGS=@CFLAGS@
+LDFLAGS=@LDFLAGS@
+
+OBJS = blockio.o display.o editcor.o exec.o find.o \
+    unixcall.o globals.o insert.o main.o misc.o \
+    modify.o move.o ucsd.o undo.o wildargs.o \
+    version.o
+
+lev: $(OBJS)
+	$(CC) $(LDFLAGS) -o lev $(OBJS) @LIBS@
+
+version.o: version.c VERSION
+	$(CC) $(CFLAGS) -c -DVERSION=\"`cat VERSION`\" version.c
+
+clean:
+	rm -f *.o lev
+
+distclean spotless: clean
+	rm -f @GENERATED_FILES@ @CONFIGURE_FILES@
+
+install: install.bin install.man
+
+install.bin: lev
+	@INSTALL_DIR@ $(PREFIX)$(exedir)
+	@INSTALL_PROGRAM@ lev $(PREFIX)$(exedir)/levee
+	@NOMK@@LN_S@ -f levee $(PREFIX)$(exedir)/lv
+
+install.man:
+	@INSTALL_DIR@ $(PREFIX)$(mandir)/man1
+	@INSTALL_DATA@ lv.1 $(PREFIX)$(mandir)/man1/levee.1
+	@NOMK@echo ".so man1/levee.1" > $(PREFIX)$(mandir)/man1/lv.1
+
+# Dependencies
+
+blockio.o    : levee.h extern.h blockio.c config.h
+display.o    : levee.h extern.h termcap.i display.c config.h
+editcor.o    : levee.h extern.h editcor.c config.h
+exec.o       : levee.h extern.h exec.c config.h
+find.o       : levee.h extern.h grep.h find.c config.h
+globals.o    : levee.h globals.c config.h
+insert.o     : levee.h extern.h insert.c config.h
+main.o       : levee.h extern.h main.c config.h
+misc.o       : levee.h extern.h misc.c config.h
+modify.o     : levee.h extern.h grep.h modify.c config.h
+move.o       : levee.h extern.h move.c config.h
+rmxcall.o    : levee.h rmxcall.c config.h
+ucsd.o       : levee.h extern.h ucsd.c config.h
+undo.o       : levee.h extern.h undo.c config.h
+unixcall.o   : levee.h extern.h unixcall.c config.h
+wildargs.o   : levee.h extern.h wildargs.c config.h

src/cmd/levee/VERSION

@@ -0,0 +1 @@
+3.5a

src/cmd/levee/beep.c

@@ -0,0 +1,48 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2007 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+#include "levee.h"
+
+#if OS_ATARI
+#include <atari\osbind.h>
+
+char sound[] = {
+	0xA8,0x01,0xA9,0x01,0xAA,0x01,0x00,
+	0xF8,0x10,0x10,0x10,0x00,0x20,0x03
+};
+
+#define SADDR	0xFF8800L
+
+typedef char srdef[4];
+
+srdef *SOUND = (srdef *)SADDR;
+
+main()
+{
+    register i;
+    long ssp;
+
+    ssp = Super(0L);
+    for (i=0; i<sizeof(sound); i++) {
+	(*SOUND)[0] = i;
+	(*SOUND)[2] = sound[i];
+    }
+    Super(ssp);
+}
+#endif /*OS_ATARI*/

src/cmd/levee/blockio.c

@@ -0,0 +1,50 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2007 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+#include "levee.h"
+#include "extern.h"
+
+/* read in a file -- return TRUE -- read file
+			    FALSE-- file too big
+*/
+
+int PROC
+addfile(f, start, endd, size)
+FILE *f;
+int start;
+int endd, *size;
+{
+    register int chunk;
+
+    chunk = read(fileno(f), core+start, (endd-start)-1);
+
+    *size = chunk;
+    return chunk < (endd-start)-1;
+}
+
+
+/* write out a file -- return TRUE if ok. */
+
+bool PROC
+putfile(f, start, endd)
+register FILE *f;
+register int start, endd;
+{
+    return write(fileno(f), core+start, endd-start) == (endd-start);
+}

src/cmd/levee/config.h

@@ -0,0 +1,26 @@
+/*
+ * configuration for levee, generated Tue Jan  6 12:41:26 PST 2015
+ * by sergev@ubuntu-sergev
+ */
+#ifndef __AC_LEVEE_D
+#define __AC_LEVEE_D 1
+
+// Size of editor data buffer.
+#define SIZE 16000
+
+#define OS_UNIX 1
+#define HAVE_STRING_H 1
+#define HAVE_MEMSET 1
+#define HAVE_STRCHR 1
+#define HAVE_BASENAME 1
+#define HAVE_SIGNAL_H 1
+#define HAVE_SIGNAL 1
+#define HAVE_TGETENT 1
+#define USE_TERMCAP 1
+#define HAVE_MVCUR 1
+#define mvcur __mvcur
+#define HAVE_TCGETATTR 1
+#define PATH_FIND "/bin/find"
+#define PATH_SED "/bin/sed"
+
+#endif/* __AC_LEVEE_D */

src/cmd/levee/configure.sh

@@ -0,0 +1,112 @@
+#! /bin/sh
+
+# local options:  ac_help is the help message that describes them
+# and LOCAL_AC_OPTIONS is the script that interprets them.  LOCAL_AC_OPTIONS
+# is a script that's processed with eval, so you need to be very careful to
+# make certain that what you quote is what you want to quote.
+
+ac_help="
+--use-termcap		Link with termcap instead of curses, if possible
+--partial-install	Don\'t install the lv, lv(1) name links
+--size=NNN		Use a NNN-byte edit buffer
+--dos			compile for ms-dos or microsoft windows
+--tos			compile for the Atari ST
+--rmx			compile for RMX
+--flexos		compile for FlexOS"
+
+LOCAL_AC_OPTIONS='
+case Z$1 in
+Z--partial-install)
+	    missing_lv=1;;
+Z--dos)	    ac_os=DOS;;
+Z--tos)     ac_os=ATARI=1;;
+Z--flexos)  ac_os=FLEXOS=1;;
+Z--rmx)	    ac_os=RMX;;
+Z--size=*)  SIZE=$(echo Z$1 | sed -e 's/^Z--size=//') ;;
+*)          ac_error=1;;
+esac;shift'
+
+# load in the configuration file
+#
+TARGET=levee
+. ./configure.inc
+AC_INIT $TARGET
+
+# validate --size=
+#
+case X"${SIZE}" in
+X[0-9][0-9]*)	 ;;
+X[0-9][0-9]*[Ll]);;
+X)               ;;
+X*)		 AC_FAIL "--size=$SIZE is not a valid number" ;;
+esac
+
+AC_PROG_CC
+
+if [ "$OS_DOS" ]; then
+    AC_DEFINE	SIZE ${SIZE:-32000}
+    AC_DEFINE	PROC	_fastcall
+    AC_DEFINE	TTY_ANSI	1
+    AC_CHECK_FUNCS	basename
+elif [ "$OS_ATARI" ]; then
+    AC_DEFINE	SIZE ${SIZE:-32000}
+    AC_DEFINE	TTY_VT52	1
+    AC_DEFINE	HAVE_BLKFILL	1
+    AC_CHECK_FUNCS	basename
+elif [ "$OS_FLEXOS" ]; then
+    AC_DEFINE	SIZE ${SIZE:-256000}
+    AC_CHECK_FUNCS	basename
+else
+    AC_DEFINE	SIZE ${SIZE:-256000}
+    AC_DEFINE	OS_UNIX	1
+
+    if AC_CHECK_HEADERS string.h; then
+	# Assume a mainly ANSI-compliant world, where the
+	# existance of string.h implies a memset() and strchr()
+	AC_DEFINE HAVE_MEMSET	1
+	AC_DEFINE HAVE_STRCHR	1
+    else
+	AC_CHECK_FUNCS memset
+	AC_CHECK_FUNCS strchr
+    fi
+
+    # for basename
+    if AC_CHECK_FUNCS basename; then
+	AC_CHECK_HEADERS libgen.h
+    fi
+
+    if AC_CHECK_HEADERS signal.h; then
+	# Assume a mainly sane world where the existance
+	# of signal.h means that signal() exists
+	AC_DEFINE HAVE_SIGNAL 1
+    fi
+
+    if [ "$USE_TERMCAP" ]; then
+	LIBORDER="-ltermcap -lcurses -lncurses"
+    else
+	LIBORDER="-lcurses -lncurses -ltermcap"
+    fi
+
+    if AC_LIBRARY tgetent $LIBORDER; then
+	AC_CHECK_HEADERS termcap.h || AC_FAIL "levee needs <termcap.h>"
+	AC_DEFINE USE_TERMCAP	1
+	# our -libtermcap might be (n)curses in disguise.  If so,
+	# it might have a colliding mvcur() that we need to define
+	# ourselves out from.
+	AC_QUIET AC_CHECK_FUNCS mvcur && AC_DEFINE mvcur __mvcur
+    else
+	# have to use a local termcap
+	AC_DEFINE TERMCAP_EMULATION	1
+	AC_DEFINE USE_TERMCAP	1
+    fi
+
+    AC_CHECK_HEADERS termios.h && AC_CHECK_FUNCS tcgetattr
+fi
+
+if AC_PROG_LN_S && test -z "$missing_lv"; then
+    AC_SUB NOMK ''
+else
+    AC_SUB NOMK '@#'
+fi
+
+AC_OUTPUT Makefile

src/cmd/levee/display.c

@@ -0,0 +1,349 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2007 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+#include "levee.h"
+#include "extern.h"
+
+/* do a gotoXY -- allowing -1 for same row/column */
+
+#if USE_TERMCAP | OS_ATARI
+
+#define MAXCOLS 160
+
+#if USE_TERMCAP
+#include "termcap.i"
+#endif
+
+#else /*!(USE_TERMCAP | OS_ATARI)*/
+
+#define MAXCOLS COLS
+
+#endif
+
+VOID PROC
+mvcur(y,x)
+int y,x;
+{
+#if TERMCAP_EMULATION || TTY_ANSI
+    static char gt[30];
+#endif
+   
+    if (y == -1)
+	y = curpos.y;
+    else
+	curpos.y = y;
+    if (y >= LINES)
+	y = LINES-1;
+    if (x == -1)
+	x = curpos.x;
+    else
+	curpos.x = x;
+    if (x >= COLS)
+	x = COLS-1;
+
+#if TERMCAP_EMULATION
+    tgoto(gt,y,x);
+    strput(gt);
+#elif USE_TERMCAP
+    strput( tgoto(CM, x, y) );
+#elif TTY_ZTERM
+    zgoto(x,y);
+#elif TTY_ANSI
+    {	register char *p = gt;		/* make a ansi gotoXY string */
+	*p++ = 033;
+	*p++ = '[';
+	numtoa(p,1+y); p += strlen(p);
+	*p++ = ';';
+	numtoa(p,1+x); p += strlen(p);
+	*p++ = 'H';
+	WRITE_TEXT(1, gt, (p-gt));
+    }
+#elif TTY_VT52
+    CM[2] = y+32;
+    CM[3] = x+32;
+    strput(CM);
+#endif
+}
+
+VOID PROC
+numtoa(str,num)
+char *str;
+int num;
+{
+    int i = 10;			/* I sure hope that str is 10 bytes long... */
+    bool neg = (num < 0);
+
+    if (neg)
+	num = -num;
+
+    str[--i] = 0;
+    do{
+	str[--i] = (num%10)+'0';
+	num /= 10;
+    }while (num > 0);
+    if (neg)
+	str[--i] = '-';
+    moveleft(&str[i], str, 10-i);
+}
+
+VOID PROC
+printi(num)
+int num;
+{
+    char nb[10];
+    register int size;
+    
+    numtoa(nb,num);
+    size = min(strlen(nb),COLS-curpos.x);
+    if (size > 0) {
+	nb[size] = 0;
+	zwrite(nb, size);
+	curpos.x += size;
+    }
+}
+
+VOID PROC
+println()
+{
+    zwrite("\r\n", 2);
+    curpos.x = 0;
+    curpos.y = min(curpos.y+1, LINES-1);
+}
+
+/* print a character out in a readable form --
+ *    ^<x> for control-<x>
+ *    spaces for <tab>
+ *    normal for everything else
+ */
+
+static char hexdig[] = "0123456789ABCDEF";
+
+int PROC
+format(out,c)
+/* format: put a displayable version of c into out */
+register char *out;
+register unsigned c;
+{
+    if (c >= ' ' && c < '') {
+    	out[0] = c;
+    	return 1;
+    }
+    else if (c == '\t' && !list) {
+	register int i;
+	int size;
+
+	for (i = size = tabsize - (curpos.x % tabsize);i > 0;)
+	    out[--i] = ' ';
+	return size;
+    }
+    else if (c < 128) {
+    	out[0] = '^';
+    	out[1] = c^64;
+    	return 2;
+    }
+    else {
+#if OS_DOS
+	out[0] = c;
+	return 1;
+#else
+	out[0] = '\\';
+	out[1] = hexdig[(c>>4)&017];
+	out[2] = hexdig[c&017];
+	return 3;
+#endif
+    }
+}
+
+VOID PROC
+printch(c)
+char c;
+{
+    register int size;
+    char buf[MAXCOLS];
+
+    size = min(format(buf,c),COLS-curpos.x);
+    if (size > 0) {
+	buf[size] = 0;
+	zwrite(buf, size);
+	curpos.x += size;
+    }
+}
+
+VOID PROC
+prints(s)
+char *s;
+{
+    int size,oxp = curpos.x;
+    char buf[MAXCOLS+1];
+    register int bi = 0;
+
+    while (*s && curpos.x < COLS) {
+    	size = format(&buf[bi],*s++);
+    	bi += size;
+    	curpos.x += size;
+    }
+    size = min(bi,COLS-oxp);
+    if (size > 0) {
+	buf[size] = 0;
+	zwrite(buf, size);
+    }
+}
+
+VOID PROC
+writeline(y,x,start)
+int y,x,start;
+{
+    int endd,oxp;
+    register int size;
+    char buf[MAXCOLS+1];
+    register int bi = 0;
+    
+    endd = fseekeol(start);
+    if (start==0 || core[start-1] == EOL)
+	mvcur(y, 0);
+    else
+	mvcur(y, x);
+    oxp = curpos.x;
+
+    while (start < endd && curpos.x < COLS) {
+    	size = format(&buf[bi],core[start++]);
+    	bi += size;
+    	curpos.x += size;
+    }
+    if (list) {
+    	buf[bi++] = '$';
+    	curpos.x++;
+    }
+    size = min(bi,COLS-oxp);
+    if (size > 0) {
+	buf[size] = 0;
+	zwrite(buf, size);
+    }
+    if (curpos.x < COLS)
+	strput(CE);
+}
+
+/* redraw && refresh the screen */
+
+VOID PROC
+refresh(y,x,start,endd,rest)
+int y,x,start,endd;
+bool rest;
+{
+    int sp;
+    
+#if OS_ATARI
+    /* turn the cursor off */
+    asm(" clr.l  -(sp)     ");
+    asm(" move.w #21,-(sp) ");
+    asm(" trap   #14       ");
+    asm(" addq.l #6,sp     ");
+#endif
+    sp = start;
+    while (sp <= endd) {
+	writeline(y, x, sp);
+	sp = 1+fseekeol(sp);
+	y++;
+	x = 0;
+    }
+    if (rest && sp >= bufmax)
+	while (y<LINES-1) { /* fill screen with ~ */
+	    mvcur(y, 0);
+	    printch('~'); strput(CE);
+	    y++;
+	}
+#if OS_ATARI
+    /* turn the cursor back on */
+    asm(" clr.w  -(sp)     ");
+    asm(" move.w #1,-(sp)  ");
+    asm(" move.w #21,-(sp) ");
+    asm(" trap   #14       ");
+    asm(" addq.l #6,sp     ");
+#endif
+}
+
+/* redraw everything */
+
+VOID PROC
+redisplay(flag)
+bool flag;
+{
+    if (flag)
+	clrprompt();
+    refresh(0, 0, ptop, pend, TRUE);
+}
+    
+VOID PROC
+scrollback(curr)
+int curr;
+{
+    mvcur(0,0);		/* move to the top line */
+    do {
+	ptop = bseekeol(ptop-1);
+	strput(UpS);
+	writeline(0, 0, ptop);
+    } while (ptop > curr);
+    setend();
+}
+
+VOID PROC
+scrollforward(curr)
+int curr;
+{
+    do {
+	writeline(LINES-1, 0, pend+1);
+	zwrite("\n", 1);
+	pend = fseekeol(pend+1);
+	ptop = fseekeol(ptop)+1;
+    } while (pend < curr);
+}
+
+/* find if the number of lines between top && bottom is less than dofscroll */
+
+bool PROC
+ok_to_scroll(top,bottom)
+int top,bottom;
+{
+    int nl, i;
+    
+    nl = dofscroll;
+    i = top;
+    do
+	i += 1+scan(bufmax-i,'=',EOL, &core[i]);
+    while (--nl > 0 && i < bottom);
+    return(nl>0);
+}
+
+VOID PROC
+clrprompt()
+{
+    mvcur(LINES-1,0);
+    strput(CE);
+}
+
+VOID PROC
+prompt(toot,s)
+bool toot;
+char *s;
+{
+    if (toot)
+	error();
+    clrprompt();
+    prints(s);
+}

src/cmd/levee/dos.asm

@@ -0,0 +1,50 @@
+	name	dos
+	page	55,80
+	title	'DOS.ASM -- assembly routines for the teeny-shell under DOS'
+
+_TEXT	segment byte public 'CODE'
+
+        assume  cs:_TEXT
+
+public	_fail_criterr
+;
+; If we get a critical error, just fail it - dos 3.0 and up only, please!
+;
+_fail_criterr proc far
+	mov	al, 3
+	iret
+_fail_criterr endp
+
+public _ignore_ctrlc
+;
+; If the user presses ^C, don't do any special handling of it.
+;
+_ignore_ctrlc proc far
+	iret
+_ignore_ctrlc endp
+_pexec	endp
+
+public _intr_on_ctrlc
+;
+; If the user presses ^C, terminate the current process.
+;
+_intr_on_ctrlc proc far
+	mov	ah, 4ch
+	mov	al, 0ffh
+	int	21h
+_intr_on_ctrlc endp
+
+public _crawcin
+;
+; get a character from standard input without any sort of magical
+; processing.
+;
+_crawcin proc far
+	mov	ah, 07h
+	int	21h
+	ret
+_crawcin endp
+
+_TEXT	ends
+
+	end

src/cmd/levee/doscall.c

@@ -0,0 +1,200 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2007 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+/*
+ * dos interface for levee (Microsoft C)
+ */
+#include "levee.h"
+
+#if OS_DOS
+#include <glob.h>
+#include <dos.h>
+
+int PROC
+min(a,b)
+int a,b;
+{
+    return (a>b) ? b : a;
+}
+
+int PROC
+max(a,b)
+int a,b;
+{
+    return (a<b) ? b : a;
+}
+
+PROC
+strput(s)
+char *s;
+{
+    write(1, s, strlen(s));
+}
+
+/* get a key, mapping certain control sequences
+ */
+PROC
+getKey()
+{
+    register c;
+    extern char _far crawcin();
+
+    c = crawcin();
+
+    if (c == 0 || c == 0xe0)
+	switch (c=crawcin()) {
+	case 'K': return LTARROW;
+	case 'M': return RTARROW;
+	case 'H': return UPARROW;
+	case 'P': return DNARROW;
+	case 'I': return 'U'-'@';	/* page-up */
+	case 'Q': return 'D'-'@';	/* page-down */
+	default : return 0;
+	}
+    return c;
+}
+
+
+/* don't allow interruptions to happen
+ */
+PROC
+nointr()
+{
+    extern void _cdecl _interrupt _far ignore_ctrlc();
+    _dos_setvect(0x23, ignore_ctrlc);
+} /* nointr */
+
+
+/* have ^C do what it usually does
+ */
+PROC
+allowintr()
+{
+    extern void _cdecl _interrupt _far intr_on_ctrlc();
+    _dos_setvect(0x23, intr_on_ctrlc);
+} /* allowintr */
+
+
+/*
+ * basename() returns the filename part of a pathname
+ */
+char *
+basename(s)
+register char *s;
+{
+    register char *p = s;
+    
+    for (p = s+strlen(s); p > s; --p)
+	if (p[-1] == '/' || p[-1] == '\\' || p[-1] == ':')
+	    return p;
+    return s;
+} /* basename */
+
+
+/*
+ * glob() expands a wildcard, via calls to _dos_findfirst/_next()
+ * and pathname retention.
+ */
+char *
+glob(path, dta)
+char *path;
+struct glob_t *dta;
+{
+    static char path_bfr[256];		/* full pathname to return */
+    static char *file_part;		/* points at file - for filling */
+    static char isdotpattern;		/* looking for files starting with . */
+    static char isdotordotdot;		/* special case . or .. */
+    static struct glob_t *dta_bfr;	/* pointer to desired dta */
+    static struct find_t dird;		/* DOS dta */
+
+    register st;			/* status from _dos_findxxx */
+
+    if (path) {
+	/* when we start searching, save the path part of the filename in
+	 * a safe place.
+	 */
+	strcpy(path_bfr, path);
+	file_part = basename(path_bfr);
+
+	/* set up initial parameters for DosFindFirst()
+	 */
+	dta_bfr = dta;
+	
+	if (isdotpattern = (*file_part == '.'))
+	    /* _dos_findfirst() magically expands . and .. into their
+	     * directory names.  Admittedly, there are cases where
+	     * this can be useful, but this is not one of them. So,
+	     * if we find that we're matching . and .., we just
+	     * special-case ourselves into oblivion to get around
+	     * this particular bit of DOS silliness.
+	     */
+	    isdotordotdot = (file_part[1] == 0 || file_part[1] == '.');
+	else
+	    isdotordotdot = 0;
+
+	st = _dos_findfirst(path, 0x16, &dird);
+    }
+    else
+	st = _dos_findnext(&dird);
+
+    while (st == 0) {
+	/* Unless the pattern has a leading ., don't include any file
+	 * that starts with .
+	 */
+	if (dird.name[0] == '.' && !isdotpattern)
+	    st = _dos_findnext(&dird);
+	else {
+	    /* found a file - affix the path leading to it, then return
+	     * a pointer to the (static) buffer holding the path+the name.
+	     */
+	    strlwr(dird.name);		/* DOS & OS/2 are case-insensitive */
+
+	    if (dta_bfr) {
+		dta_bfr->wr_time = dird.wr_time;
+		dta_bfr->wr_date = dird.wr_date;
+		if (isdotordotdot)
+		    strcpy(dta_bfr->name, file_part);
+		else {
+		    strncpy(dta_bfr->name, dird.name, sizeof(dta_bfr->name)-1);
+		    dta_bfr->name[sizeof(dta_bfr->name)-1] = 0;
+		}
+		dta_bfr->size   = dird.size;
+		dta_bfr->attrib = dird.attrib;
+	    }
+	    if (!isdotordotdot)
+		strcpy(file_part, dird.name);
+	    return path_bfr;
+	}
+    }
+    /* nothing matched
+     */
+    if (path && isdotordotdot) {
+	/* must be at root, so statting dot will most likely fail.  Fake a
+	 * dta.
+	 */
+	if (dta_bfr) {
+	    memset(dta_bfr, 0, sizeof *dta_bfr);
+	    dta_bfr->attrib = 0x10;
+	    dta_bfr->name[0] = '.';
+	}
+	return path_bfr;
+    }
+    return (char*)0;
+} /* glob */
+#endif /*OS_DOS*/

src/cmd/levee/editcor.c

@@ -0,0 +1,644 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2008 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+#include "levee.h"
+#include "extern.h"
+#include <stdlib.h>
+
+/* do some undoable modification */
+
+/* These variables make docommand nonrecursive */
+
+bool	ok;
+int	newend,		/* end position after change */
+	disp,		/* start redisplay here */
+	newc,		/* new cursor position for wierd cmds */
+	endY;		/* final yp for endp */
+
+/* move a line of text right || left */
+
+VOID PROC
+adjuster(sleft, endd, sw)
+bool sleft;
+int endd, sw;
+{
+    bool noerror;
+    int np, ts,
+	ip,
+	ss, adjp,
+	DLEnum;
+
+    if (sw == -1)
+	sw = shiftwidth;
+    if (sleft)
+	sw = -sw;
+    curr = bseekeol(curr);
+    ip = curr;
+    noerror = TRUE;
+    do {
+	DLEnum = sw + findDLE(ip, &np, bufmax,0);
+	if (DLEnum >= 0 && DLEnum <= COLS && core[np] != EOL && np < bufmax) {
+	    ts = DLEnum / tabsize;
+	    ss = DLEnum % tabsize;
+	    adjp = ts+ss+ip;
+	    if (np-adjp < 0) {	/* expand the buf */
+		moveright(&core[np], &core[adjp], bufmax-np);
+		insert_to_undo(&undo, adjp, adjp - np);
+	    }
+	    else
+		delete_to_undo(&undo, adjp, np - adjp);
+
+	    endd += (adjp-np);
+	    noerror = move_to_undo(&undo, ip, ts+ss);
+	    fillchar(&core[ip], ts, TAB);
+	    fillchar(&core[ip+ts], ss, 32);
+	}
+	else if (np > ip) {	/* remove the indent code */
+	    noerror = delete_to_undo(&undo, ip, np-ip);
+	    endd += (ip - np);
+	}
+	ip = 1 + fseekeol(ip);
+    } while (noerror && ip < endd);
+    if (!noerror)
+	error();
+    newc = skipws(curr);
+    disp = curr;
+    newend = endd;
+    endY = setY(min(newend, pend));
+}
+
+/* join <count> lines together */
+
+VOID PROC
+join(count)
+int count;
+{
+    bool ok;
+    int lp, first;
+
+    if (lend < bufmax) {	/* are we in the buffer? */
+	disp = lend;				/* start redraw here */
+	newc = lend;
+	do {					/* join until.. */
+	    first = lend;
+	    lp = skipws(1+first);
+	    ok = delete_to_undo(&undo, 1+first, lp-(1+first));
+	    if (ok) {
+		ok = move_to_undo(&undo, first, 1);
+		core[first] = ' ';		/* spaces between lines */
+	    }
+	    count--;
+	    lend = fseekeol(first);
+	} while (ok && count > 0);
+	endY = MAGICNUMBER;
+	newend = lend;
+	if (!ok)
+	    error();
+    }
+    else
+	error();
+}
+
+VOID PROC
+squiggle(endp, c, dorepl)
+int endp;
+char c;
+bool dorepl;
+{
+    int i;
+
+    if (endp >= curr) {
+	ok = move_to_undo(&undo,curr,endp-curr+1);
+	if (ok) {
+	    for (i = curr;i<=endp;i++) {
+		if (!dorepl) {		/* squiggle it to uc - lc */
+		    if (core[i] >='A' && core[i] <='Z')
+			core[i] += 32;
+		    else if (core[i]>='a' && core[i]<='z')
+			core[i] -= 32;
+		}
+		else
+		    core[i] = c;
+	    }
+	    newend = min(endp+1,lend);
+	}
+    }
+}
+
+VOID PROC
+bigreplace()
+{
+    int len, tsiz;
+
+    tsiz = lend-curr;
+    if (move_to_undo(&undo, curr, tsiz))
+	if (SIZE - bufmax > tsiz) {	/* enough room for temp copy? */
+	    moveleft(&core[curr], &core[bufmax],lend-curr);
+	    if (line(core, curr, lend, &len) != ESC)
+		error();
+	    newend = curr+len;
+	    moveright(&core[bufmax+len], &core[newend], lend-newend);
+	}
+}
+
+bool PROC
+put(before)
+bool before;
+{
+    endY = setY(curr);
+    if (!before)
+	if (yank.lines)
+	    curr = min(lend+1,bufmax);
+	else
+	    curr = min(curr+1, lend);
+    else if (yank.lines)
+	curr = lstart;
+    newc = disp = curr;
+    return(putback(curr, &newend));
+}
+
+bool PROC
+execute(start, end)
+{
+    int tf;
+    FILE *f;
+    char scratch[20];
+    bool ret = FALSE;
+    int size;
+
+    strcpy(scratch, "/tmp/lv.XXXXXX");
+
+    clrprompt();
+    printch('!');
+    if ( !getlin(instring) )
+	return FALSE;
+
+    if ( (tf = mkstemp(scratch)) < 0 ) {
+	prints("[tempfile error]");
+	return FALSE;
+    }
+
+    strcat(instring, " 2>&1 <");
+    strcat(instring, scratch);
+
+    if ( (size = write(tf, core+start, end-start)) == (end-start) ) {
+	if ( (f=popen(instring, "r")) ) {
+	    if ( deletion(start, end) && (insertfile(f, 1, start, &size) > 0) )
+		ret = TRUE;
+	    pclose(f);
+	}
+	else
+	    error();
+    }
+
+    close(tf);
+    unlink(scratch);
+
+    return ret;
+}
+
+VOID PROC
+gcount()
+{
+    do {
+	count = (count*10) + (ch-'0');
+	readchar(); /* get a char to replace the one we dumped */
+    } while ( count >= 0 && isdigit(ch) );
+}
+
+VOID PROC
+docommand(cmd)
+cmdtype cmd;
+{
+    cmdtype movecmd;	/* movement command for y, d, c */
+    char    cmdch;
+    int     oldc;	/* old count */
+    int     endp;	/* end position before change */
+    extern bool s_wrapped;
+
+    resetX();				/* un-derange the cursor */
+    oldc = newc = -1;
+    endY = yp;
+    newend = disp = curr;
+    ok = TRUE;				/* so far everything is working */
+    cmdch = ch;
+    if (cmd != UNDO_C && cmd != YANK_C) {
+	if (macro<0)
+	    zerostack(&undo);
+	if (redoing != TRUE) {
+	    rcp = rcb;		/* point at start of redo buffer */
+	    if (count > 1) {	/* put in a count? */
+		numtoa(rcb,count);
+		rcp += strlen(rcb);
+	    }
+	    *rcp++ = cmdch;	/* the command char goes in... */
+	    xerox = TRUE;	/* hoist the magical flags */
+	}
+    }
+
+    if (cmd <= YANK_C) {
+	readchar();
+	if ( isdigit(ch) && ch != '0' ) {
+	    oldc = count;
+	    count = 0;
+	    gcount();				/* get a new count */
+	    if (cmd == ADJUST_C)		/* special for >>,<< wierdness */
+		swap(&count, &oldc);		/* reverse sw & count */
+	    else
+		count = count*max(oldc,1);	/* combine them */
+	}
+	if (ch == cmdch) {		/* diddle lines */
+	    yank.lines = TRUE;
+	    endp = nextline(TRUE, curr, count);
+	    curr = bseekeol(curr);
+	    disp = curr;
+	}
+	else {				/* diddle 'things' */
+	    yank.lines = FALSE;
+	    movecmd = movemap[(unsigned int)ch];
+
+	    if ( (ok = (findCP(curr,&endp,movecmd) == LEGALMOVE)) ) {
+		if (curr > endp) {
+		    swap(&curr,&endp);
+		    ok = (cmd != CHANGE_C);
+		}
+		if (adjcurr[(unsigned int)movecmd])
+		    curr++;
+		if (adjendp[(unsigned int)movecmd])
+		    endp++;
+	    }
+	    if (!ok) {
+		if (ch != ESC)
+		    error();
+		goto killredo;
+	    }
+	}
+
+	endY = setY(endp);
+	newend = curr;
+	disp = curr;
+	switch (cmd) {
+	    case EXEC_C:
+		ok = execute(curr, endp);
+		break;
+	    case DELETE_C:
+		ok = deletion(curr, endp);
+		break;
+	    case ADJUST_C:
+		adjuster((cmdch == '<'), endp-1, oldc);
+		break;
+	    case CHANGE_C:
+		if (endp <= pend+1) {
+		    mvcur(setY(endp-1), setX(endp-1));
+		    printch('$');
+		    mvcur(yp, xp);
+		}
+		if (deletion(curr, endp))
+		    ok = ((newend = insertion(1, 0, &disp, &endY, TRUE)) >= 0);
+		else
+		    ok = FALSE;
+		break;
+	    case YANK_C:
+		if (!doyank(curr, endp))
+		    error();
+		return;	/* xerox will not be true, nor will redoing */
+	}
+
+    }
+    else {
+	endp = curr;
+	endY = yp;
+
+	switch (cmd) {
+	    case I_AT_NONWHITE:
+	    case A_AT_END:
+	    case APPEND_C:
+	    case INSERT_C:		/* variations on insert */
+		if (cmd != INSERT_C) {
+		    if (cmd == APPEND_C)
+			curr = min(curr+1, lend);
+		    else if (cmd == A_AT_END)
+			curr = lend;
+		    else /* if (cmd == I_AT_NONWHITE) */
+			curr = skipws(lstart);
+		    xp = setX(curr);
+		    mvcur(yp,xp);
+		}
+		newend = insertion(count, 0, &disp, &endY, TRUE);
+		ok = (newend >= 0);
+		break;
+	    case OPEN_C:
+	    case OPENUP_C:
+		newend = insertion(1,setstep[ (cmd==OPENUP_C)&1 ],
+						&disp,&endY,TRUE)-1;
+		ok = (newend >= 0);
+		break;
+	    case REPLACE_C:
+	    case TWIDDLE_C:
+		if (cmd == REPLACE_C) {
+		    if ((cmdch = readchar()) == ESC)
+			goto killredo;
+		}
+		if (findCP(curr, &endp, GO_RIGHT) == LEGALMOVE)
+		    squiggle(endp-1, cmdch, (cmd==REPLACE_C));
+		break;
+	    case PUT_BEFORE:
+	    case PUT_AFTER:
+		ok = put(cmd==PUT_AFTER);
+		break;
+	    case BIG_REPL_C:
+		bigreplace();
+		break;
+	    case RESUBST_C:
+		ok = FALSE;
+		if (dst[0] != 0) {
+		    newend = chop(curr, &lend, TRUE, &ok);
+		    if (newend >= 0) {
+			endY = setY(newend+strlen(dst));
+			ok = TRUE;
+		    }
+		}
+		break;
+	    case JOIN_C:
+		join(count);		/* join lines */
+		break;
+	    case UNDO_C:			/* undo last modification */
+		ok = fixcore(&newend) >= 0;
+		disp = newend;
+		endY = MAGICNUMBER;
+		break;
+	}
+    }
+
+    if (ok) {
+	setpos((newc<0)?newend:newc);
+	setend();
+	if (curr < ptop || curr > pend) {
+	    yp = settop(12);
+	    redisplay(TRUE);
+	}
+	else {
+	    yp = setY(curr);
+	    if (endY != setY(newend))	/* shuffled lines */
+		refresh(setY(disp), setX(disp), disp, pend, TRUE);
+	    else			/* refresh to end position */
+		refresh(setY(disp), setX(disp), disp, newend, FALSE);
+	}
+	if (curr >= bufmax && bufmax > 0) {	/* adjust off end of buffer */
+	    setpos(bufmax-1);
+	    yp = setY(curr);
+	}
+	if (s_wrapped) {
+	    prompt(FALSE, "search wrapped around end of buffer");
+	    s_wrapped = 0;
+	}
+	else
+	    clrprompt();
+	modified = TRUE;
+    }
+    else {
+	error();
+killredo:
+	rcb[0] = 0;
+    }
+    mvcur(yp, xp);
+    if (xerox)
+	*rcp = 0;	/* terminate the redo */
+    redoing = FALSE;
+    xerox = FALSE;
+    core[bufmax] = EOL;
+}
+
+/* Initialize && execute a macro */
+
+VOID PROC
+exmacro()
+{
+    int mp;
+
+    mp = lookup(ch);
+    if (mp > 0) {
+	if (macro<0)
+	    zerostack(&undo);
+	insertmacro(mbuffer[mp].m_text, count);
+    }
+    else
+	error();
+}
+
+/* redraw the screen w.r.t. the cursor */
+
+VOID PROC
+zdraw(code)
+unsigned char code;
+{
+    int nl = ERR,
+	np = (count>0)?to_index(count):curr;
+
+    if (movemap[code] == CR_FWD)
+	nl = 0;
+    else if (movemap[code] == CR_BACK)
+	nl = LINES-1;
+    else if (code == '.')
+	nl = LINES / 2;
+    if (nl >= 0) {
+	curr = np;
+	yp = settop(nl);
+	redisplay(TRUE);
+	mvcur(yp,xp);
+    }
+    else
+	error();
+}
+
+/* start up a built-in macro */
+
+VOID PROC
+macrocommand()
+{
+    if (count > 1)
+	numtoa(gcb,count);
+    else
+	gcb[0] = 0;
+    switch (ch) { /* which macro? */
+	case 'x':			/* x out characters */
+	    strcat(gcb,"dl"); break;
+	case 'X':			/* ... backwards */
+	    strcat(gcb,"dh"); break;
+	case 's':			/* substitute over chars */
+	    strcat(gcb,"cl"); break;
+	case 'D':			/* delete to end of line */
+	    strcat(gcb,"d$"); break;
+	case 'C':			/* change ... */
+	    strcat(gcb,"c$"); break;
+	case 'Y':			/* yank ... */
+	    strcat(gcb,"y$"); break;
+	case '':			/* scroll up one page */
+	    strcpy(gcb,"22"); break;
+	case '':			/* ... down one page */
+	    strcpy(gcb,"22"); break;
+	case '':			/* scroll up one line */
+	    strcpy(gcb,"1"); break;
+	case '':			/* ... down one line */
+	    strcpy(gcb,"1"); break;
+	default:
+            error();
+            return;
+	break;
+    }
+    if (macro<0)
+	zerostack(&undo);
+    insertmacro(gcb, 1);
+}
+
+/* scroll the window up || down */
+
+VOID PROC
+scroll(down)
+bool down;
+{
+    int i;
+
+    if (count <= 0)
+	count = dofscroll;
+    strput(CURoff);
+    if (down) {
+	curr = min(bufmax-1, nextline(TRUE, curr, count));
+	i = min(bufmax-1, nextline(TRUE, pend, count));
+	if (i > pend)
+	    scrollforward(i);
+    }
+    else {
+	curr = bseekeol(max(0,nextline(FALSE, curr, count)));
+	i = bseekeol(max(0,nextline(FALSE, ptop, count)));
+	if (i < ptop) {
+	    if (canUPSCROLL)
+		scrollback(i);
+	    else {
+		ptop = i;
+		setend();
+		redisplay(TRUE);
+	    }
+	}
+    }
+    strput(CURon);
+    setpos(skipws(curr));	/* initialize new position - first nonwhite */
+    yp = setY(curr);
+    mvcur(yp, xp);		/* go there */
+}
+
+exec_type PROC
+editcore()
+{
+    cmdtype cmd;
+    extern bool s_wrapped;
+
+    /* rcb[0] = 0; rcp = rcb; */
+
+    if (diddled) {
+	setpos(skipws(curr));		/* set cursor x position.. */
+	yp = settop(LINES / 2);		/* Y position */
+    }
+    if (diddled || zotscreen)		/* redisplay? */
+	redisplay(FALSE);
+    mvcur(yp, xp);			/* and move the cursor */
+
+    for (;;) {
+	s_wrapped = 0;
+	ch = readchar();			/* get a char */
+	count = 0;
+	if (isdigit(ch) && ch != '0')
+	    gcount();			/* ... a possible count */
+	switch (cmd = movemap[(unsigned int)ch]) {
+	  case FILE_C:
+	    wr_stat();			/* write file stats */
+	    mvcur(yp, xp);
+	    break;
+
+	  case WINDOW_UP:
+	  case WINDOW_DOWN:
+	    scroll(cmd==WINDOW_UP);		/* scroll the window */
+	    break;
+
+	  case REDRAW_C:			/* redraw the window */
+	    redisplay(TRUE);
+	    mvcur(yp, xp);
+	    break;
+
+	  case MARKER_C:			/* set a marker */
+	    ch = tolower(readchar());
+	    if (ch >= 'a' && ch <= 'z')
+		contexts[ch-'`'] = curr;
+	    else if (ch != ESC)
+		error();
+	    break;
+
+	  case REDO_C:
+	    if (rcb[0] != 0) {
+		zerostack(&undo);
+		insertmacro(rcb, 1);
+		redoing = TRUE;
+	    }
+	    break;
+
+	  case REWINDOW:
+	    zdraw(readchar());		/* shift the window */
+	    break;
+
+	  case DEBUG_C:			/* debugging stuff -- unused */
+	    break;
+
+	  case ZZ_C:			/* shortcut for :xit */
+	    ch = readchar();
+	    if (ch == 'Z')
+		insertmacro(":x\r", 1);
+	    else if (ch != ESC)
+		error();
+	    break;
+
+	  case EDIT_C:		/* drop into line mode */
+	    return E_EDIT;
+
+	  case COLIN_C:		/* do one exec mode command */
+	    return E_VISUAL;
+
+	  case HARDMACRO:
+	    macrocommand();		/* 'hard-wired' macros */
+	    break;
+
+	  case SOFTMACRO:
+	    exmacro();		/* run a macro */
+	    break;
+
+	  case INSMACRO:		/* macro for insert mode */
+	  case BAD_COMMAND:
+	    error();
+	    break;
+
+	  default:
+	    if (cmd < DELETE_C)
+		movearound(cmd);
+	    else /*if (cmd < HARDMACRO)*/
+		docommand(cmd);
+	    break;
+	}
+	lastexec = 0;
+    }
+    /* never exits here */
+}

src/cmd/levee/extern.h

@@ -0,0 +1,237 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2007 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+#ifndef GLOBALS_D
+#define GLOBALS_D
+extern
+char lastchar,		/* Last character read via peekc */
+     ch;		/* Global command char */
+extern
+exec_type mode;			/* editor init state */
+extern
+int lastexec;			/* last exec mode command */
+
+extern
+int contexts['z'-'`'+1];	/* Labels */
+		/* C O N S T A N T S */
+extern
+bool adjcurr[PARA_BACK+1],
+     adjendp[PARA_BACK+1];
+		/* A R G U M E N T S */
+extern
+char startcmd[];	/* initial command after read */
+extern
+char **argv;		/* Arguments */
+extern
+int  argc,		/* # arguments */
+     pc;		/* Index into arguments */
+		/* M A C R O   S T U F F */
+extern
+struct macrecord mbuffer[];
+extern
+struct tmacro mcr[];		/* A place for executing macros */
+			/* S E A R C H   S T U F F */
+extern
+char dst[],			/* last replacement pattern */
+     lastpatt[],		/* last search pattern */
+     pattern[];
+extern
+int RE_start[9],		/* start of substitute argument */
+    RE_size [9],		/* size of substitute argument */
+    lastp;			/* last character matched in search */
+extern
+struct undostack undo;		/* To undo a command */
+		/* R A N D O M   S T R I N G S */
+
+extern
+char instring[],		/* Latest input */
+     filenm[],			/* Filename */
+     altnm[],			/* Alternate filename */
+     gcb[];			/* Command buffer for mutations of insert */
+
+extern
+char undobuf[],
+     undotmp[],
+     yankbuf[];
+extern
+int uread,			/* reading from the undo stack */
+    uwrite;			/* writing to the undo stack */
+			    /* B U F F E R S */
+extern
+char rcb[], *rcp,		/* last modification command */
+     core[];			/* data space */
+
+extern
+struct ybuf yank;		/* last deleted/yanked text */
+/* STATIC INITIALIZATIONS: */
+
+/* ttydef stuff */
+#if OS_ATARI | USE_TERMCAP
+extern int LINES, COLS;
+#endif
+
+#if USE_TERMCAP
+extern bool CA, canUPSCROLL;
+extern char FkL,
+	    CurRT,
+	    CurLT,
+	    CurDN,
+	    CurUP;
+#endif /*USE_TERMCAP*/
+
+extern char *TERMNAME,
+	    *HO,
+	    *UP,
+	    *CE,
+	    *CL,
+	    *OL,
+	    *BELL,
+	    *CM,
+	    *UpS,
+	    *CURoff,
+	    *CURon;
+
+extern
+char Erasechar,
+     eraseline;
+
+extern
+char codeversion[],		/* Editor version */
+     fismod[],			/* File is modified message */
+     fisro[];			/* permission denied message */
+
+extern
+char *excmds[],
+     wordset[],
+     spaces[];
+extern
+struct variable vars[];
+extern
+int autowrite,
+    autocopy,
+    overwrite,
+    beautify,
+    autoindent,
+    dofscroll,
+    shiftwidth,
+    tabsize,
+    list,
+    wrapscan,
+    bell,
+    magic;
+/*extern
+char *suffix;	*/
+/* For movement routines */
+extern
+int setstep[];
+/* Where the last diddling left us */
+extern
+struct coord curpos;
+
+    /* initialize the buffer */
+extern
+int curr,		/* Global cursor pos */
+    lstart, lend,	/* Start & end of current line */
+    count,		/* Latest count */
+    xp, yp,		/* Cursor window position */
+    bufmax,		/* End of file here */
+    ptop, pend;		/* Top & bottom of CRT window */
+extern
+bool modified,		/* File has been modified */
+     readonly,		/* is this file readonly? */
+     needchar,		/* Peekc flag */
+     deranged,		/* Up-arrow || down-arrow left xpos in Oz. */
+     indirect,		/* Reading from an indirect file?? */
+     redoing,		/* doing a redo? */
+     xerox,		/* making a redo buffer? */
+     newfile,		/* Editing a new file? */
+     newline,		/* Last insert/delete included a EOL */
+     lineonly,		/* Dumb terminal? */
+     zotscreen,		/* do more after command in execmode */
+     diddled;		/* force redraw when I enter editcore */
+
+extern
+int macro;    /* Index into MCR macro execution stack */
+extern
+char lsearch;
+/* movement, command codes */
+extern
+cmdtype movemap[];
+#endif /*GLOBALS_D*/
+#ifndef EXTERN_D
+#define EXTERN_D
+#define wc(ch)	(scan(65,'=',(ch),wordset)<65)
+
+#if HAVE_STRING_H
+#include <string.h>
+#endif
+
+#if HAVE_MEMSET
+#define fillchar(p,l,c)	memset((p),(c),(l))
+#elif HAVE_BLKFILL
+#define fillchar(p,l,c)	blkfill((p),(c),(l))
+#endif
+#if HAVE_STRCHR
+#define index(s,c)	strchr((s),(c))
+#endif
+
+extern findstates PROC findCP();
+extern exec_type PROC editcore();
+
+extern char PROC line(), peekc(), readchar();
+extern char PROC *findparse(),*makepat();
+
+extern bool PROC getlin();
+extern bool PROC putfile();
+extern bool PROC doyank(), deletion(), putback();
+extern bool PROC pushb(),pushi(),pushmem(),uputcmd(), delete_to_undo();
+extern bool PROC ok_to_scroll(), move_to_undo();
+
+extern int PROC min(), max(), fseekeol(), bseekeol(), settop();
+extern int PROC scan(), findDLE(), setY(), skipws(), nextline(), setX();
+extern int PROC insertion(), chop(), fixcore(), lookup(), to_index();
+extern int PROC doaddwork(), addfile(), expandargs(), to_line();
+extern int PROC findfwd(), findback(), getcontext(), getKey();
+extern int PROC cclass();
+extern int PROC insertfile();
+
+extern VOID PROC strput(), numtoa(), clrprompt(), setend(), error();
+extern VOID PROC insert_to_undo(), resetX(), zerostack(), swap();
+extern VOID PROC mvcur(), printch(), prints(), writeline(), refresh();
+extern VOID PROC redisplay(), scrollback(), scrollforward(), prompt();
+extern VOID PROC setpos(), resetX(), insertmacro(), wr_stat();
+extern VOID PROC movearound(), printi(), println(), killargs();
+extern VOID PROC exec(), initcon(), fixcon(), version(), setcmd();
+extern VOID PROC toedit(), inputf(), fixmarkers(), errmsg();
+
+#ifndef moveleft
+extern VOID PROC moveleft();
+#endif
+#ifndef moveright
+extern VOID PROC moveright();
+#endif
+#ifndef fillchar
+extern VOID PROC fillchar();
+#endif
+
+#if USE_TERMCAP
+extern void tc_init();
+#endif
+
+#endif /*EXTERN_D*/

src/cmd/levee/find.c

@@ -0,0 +1,514 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2007 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+#include "levee.h"
+#include "extern.h"
+#include "grep.h"
+#include <ctype.h>
+
+int PROC amatch();
+int PROC locate();
+VOID PROC patsize();
+
+static int arg;		/* arguments inside of a RE */
+
+int PROC
+REmatch(pattern, start, end)
+char *pattern;
+int start,end;
+{
+    char *endp = &core[end];
+
+    if (!*pattern)
+	return -1;
+    arg = 0;
+    while (start <= end && !amatch(pattern, &core[start], endp))
+	start++;
+    return start;
+}
+
+int PROC
+omatch(pattern, cp, endp)
+char *pattern, **cp, *endp;
+{
+    register int flag;
+    extern int ignorecase;
+
+    switch (*pattern) {
+      case LEND:
+	  return (**cp == EOL);
+      case LSTART:
+	  return (*cp == core) || (*(*cp-1) == EOL);
+      case TOKENB:
+	  return (*cp == core) || !isalnum(*(*cp-1));
+      case TOKENE:
+	  return !isalnum(**cp);
+      case LITCHAR:
+	  if (ignorecase)
+	      flag = (toupper(**cp) == toupper(*(pattern+1)));
+	  else
+	      flag = (**cp == *(pattern+1));
+	  break;
+      case ANY:
+	  flag = (**cp != EOL);
+	  break;
+      case CCL:
+	  flag = locate(pattern,*cp);
+	  break;
+      case NCCL:
+	  flag = !locate(pattern,*cp);
+	  break;
+      case ARGSTART:
+	  RE_start[arg] = (*cp)-core;
+	  return TRUE;
+      case ARGEND:
+	  RE_size[arg] = ((*cp)-core) - RE_start[arg];
+	  ++arg;
+	  return TRUE;
+      default:
+	  return TRUE;
+    }
+
+    if (*cp <= endp && flag) {
+	(*cp)++;
+	return TRUE;
+    }
+    return FALSE;
+}
+	
+int PROC
+amatch(pattern,start,endp)
+char *pattern, *endp, *start;
+{
+    int sarg = arg;	/* save old arg match count for errors */
+
+    while (*pattern) {
+	if (*pattern == CLOSURE) {
+	/*	Find the longest closure possible and work backwards trying
+	 *	to match the rest of the pattern.
+	 */
+	    char *oldstart = start;
+
+	    ++pattern;	/* skip over the closure token */
+	    while (start <= endp && omatch(pattern,&start,endp))
+		 ;
+	/*	start points at the character that failed the search.
+	 *	Try to match the rest of the pattern against it, working
+	 *	back down the line if failure
+	 */
+	    patsize(&pattern);
+	    while (start >= oldstart)
+		if (amatch(pattern,start--,endp))
+		    return TRUE;
+	    arg = sarg;
+	    return FALSE;
+	}
+	else {
+	    if (!omatch(pattern,&start,endp)) {
+		arg = sarg;
+		return FALSE;
+	    }
+	    patsize(&pattern);
+	}
+    }
+    lastp = start-core;
+    return TRUE;
+}
+
+/*  increment pattern by the size of the token being scanned
+ */
+VOID PROC
+patsize(pattern)
+register char **pattern;
+{
+    register int count;
+    
+    switch (**pattern) {
+      case LITCHAR:
+	*pattern += 2;
+	break;
+      case CCL:
+      case NCCL:
+	count = *(++*pattern) & 0xff;
+	*pattern += 1+count;
+	break;
+      default:
+	(*pattern)++;
+	break;
+    }
+}
+
+int PROC
+locate(pattern,linep)
+/* locate: find a character in a closure */
+char *pattern;
+register char *linep;
+{
+    register char *p = 1+pattern;
+    register int count;
+    
+    if ((count = (*p++)&0xff) == 0)
+	return FALSE;
+    while (count--)
+	if (*p++ == *linep)
+	    return TRUE;
+    return FALSE;
+}
+char *p;
+
+VOID PROC
+concatch(c)
+/* add a character to the pattern */
+char c;
+{
+    if (p < &pattern[MAXPAT-1])
+	*p++ = c;
+}
+
+char PROC
+esc(s)
+char **s;
+{
+    if (**s != ESCAPE || *(1+*s) == 0)
+	return **s;
+    ++(*s);
+    switch (**s) {
+      case 't': return TAB;
+      case 'n': return EOL;
+    }
+    return **s;
+}
+
+char * PROC
+dodash(src)
+/* parse the innards of a [] */
+char *src;
+{
+    int k;
+    char *start = src;
+    char cs[128];
+
+    fillchar(cs,sizeof(cs),FALSE);
+    while (*src && *src != CCLEND) {
+	if (*src == DASH && src>start && src[1] != CCLEND && src[-1]<src[1]) {
+	    for ( k = src[-1]; k <= src[1]; k++)
+		cs[k] = TRUE;
+	    src++;
+	}
+	else
+	    cs[(unsigned int)esc(&src)] = TRUE;
+	src++;
+    }
+    for (k=0; k < sizeof(cs); k++)
+	if (cs[k])
+	    concatch((char)k);
+    return src;
+}
+
+char * PROC
+badccl(src)
+/* a [] was encountered. is it a CCL (match one of the included
+ *  characters); or is it a NCCL (match all but the included characters)?
+ */
+char *src;
+{
+    char *jstart;
+
+    if (*src == NEGATE) {
+	concatch(NCCL);
+	++src;
+    }
+    else
+	concatch(CCL);
+    jstart = p;
+    concatch(0);		/* this will be the length of the pattern */
+    src = dodash(src);
+    *jstart = (p-jstart)-1;
+    return src;
+}
+
+	/* patterns that cannot be closed */
+char badclose[] = { LSTART, LEND, CLOSURE, 0 };
+
+char * PROC
+makepat(string,delim)
+char *string, delim;
+/* make up the pattern string for find	-- ripped from 'Software Tools' */
+{
+    char *cp = 0, *oldcp;
+    char *start = string;
+    int inarg = FALSE;
+
+    for(arg=0;arg<9;++arg)
+	RE_start[arg] = RE_size[arg] = (-1);
+    arg = 0;
+    p = pattern;
+    
+    while ((*string != delim) && (*string != 0)) {
+	oldcp = cp;
+	cp = p;
+	
+	if (!magic)		/* kludge for nonmagical patterns */
+	    goto normal;
+	if (*string == ANY)
+	    concatch(ANY);
+	else if ((*string == LSTART) && (string == start))
+	    concatch(LSTART);
+	else if ((*string == LEND) && (string[1] == delim || string[1] == 0))
+	    concatch(LEND);
+	else if (*string == CCL)
+	    string = badccl(1+string);
+	else if ((*string == CLOSURE) && (p > pattern)) {
+	    cp = oldcp;
+	    if (strchr(badclose, *cp) || p >= &pattern[MAXPAT-1])
+		return NULL;
+	    moveright(cp,1+cp,(int)(p-cp));
+	    *cp = CLOSURE;
+	    p++;
+	}
+	else if (*string == ESCAPE) {
+	    if (string[1] == ARGSTART || string[1] == ARGEND) {
+		if (string[1] == ARGEND)
+		    if (!inarg)
+			goto normal;
+		if (string[1] == ARGSTART) {
+		    if (inarg)
+			goto normal;
+		    if (++arg > 9)
+			return NULL;
+		}
+		inarg = !inarg;
+	    }
+	    else if (string[1] != TOKENB && string[1] != TOKENE)
+		goto normal;
+	    ++string;
+	    concatch(*string);
+	}
+	else {
+     normal:concatch(LITCHAR);
+	    concatch(esc(&string));
+	}
+	if (*string)
+	    string++;
+    }
+    if (inarg)
+	concatch(ARGEND);
+    if (p > pattern) {		/* new pattern was created */
+	strncpy(lastpatt,start,(int)(string-start));
+	lastpatt[string-start] = 0;
+	concatch(0);
+	if (p-pattern >= MAXPAT)
+	    return NULL;
+    }
+    return (*string == delim)?(string+1):(string);
+}
+
+int PROC
+findfwd(pattern,start,endp)
+/* look for a regular expression forward */
+char *pattern;
+int start, endp;
+{
+    int ep;
+
+     while (start < endp) {
+	 ep = fseekeol(start);
+	 if ((start = REmatch(pattern, start, ep)) <= ep)
+	     return start;
+     }
+     return ERR;
+ }
+
+int PROC
+findback(pattern,start,endp)
+/* look for a regular expression backwards */
+char *pattern;
+int start, endp;
+{
+    int ep,i;
+
+     while (start > endp) {
+	 ep = bseekeol(start);
+	 if ((i = REmatch(pattern, ep, start)) <= start)
+	     return i;
+	 start = ep-1;
+     }
+     return ERR;
+ }
+
+bool s_wrapped = 0;
+
+char * PROC
+search(pat, start)
+/* get a token for find & find it in the buffer
+ */
+char *pat;
+int *start;
+{
+    bool forwd;
+    int  pos;
+    char *p;
+
+    forwd = ((lsearch = *pat) == '/');
+    if ((p=makepat(pat+1,*pat)) == NULL) {
+	*start = ERR;
+	return pat;
+    }
+    do {
+	if (forwd) {
+	    pos = findfwd(pattern, (*start)+1, bufmax-1);
+	    if ((pos == ERR) && wrapscan) {
+		s_wrapped = 1;
+		pos = findfwd(pattern, 0, (*start)-1);
+	    }
+	}
+	else {
+	    pos = findback(pattern, (*start)-1, 0);
+	    if ((pos == ERR) && wrapscan) {
+		s_wrapped = 1;
+		pos = findback(pattern, bufmax-1, (*start)+1);
+	    }
+	}
+	*start = pos;
+    } while (--count > 0 && *start != ERR);
+    return p;
+}
+
+char * PROC
+findparse(src,idx,start) /* driver for ?, /, && : lineranges */
+char *src;
+int *idx,start;
+{
+    int addr = start;
+    char c;
+
+    s_wrapped = 0;
+
+    switch (*src) {
+	case '/':
+	case '?':
+	    /* get a token for find & find it in the buffer */
+	    src = search(src,&addr);
+	break;
+	case '0': case '1': case '2': case '3': case '4':
+	case '5': case '6': case '7': case '8': case '9':
+	    /* fabricate a count */
+	    count = 0;
+	    while (*src >= '0' && *src <= '9')
+		count = (count*10) + *(src++) - '0';
+		
+	    addr = to_index(count);
+	break;
+	case '$':
+	    addr = bufmax-1;
+	    src++;
+	break;
+	case '.' :
+	    src++;
+	break;
+	case '`':
+	case '\'':
+	    addr = getcontext(*(src+1), (*src == '\''));
+	    src += 2;
+	break;
+    }
+
+    while (addr>=0 && (*src =='+' || *src == '-')) {
+	c = *(src++);
+	/* skip delimiter */
+	if (*src == '/' || *src == '?') {
+	    count = 1;
+	    if ((src = search(src,&addr)) == NULL)
+		break;
+	}
+	else {
+	    if (*src >= '0' && *src <= '9') {
+		/* fabricate a count */
+		count = 0;
+		while (*src >= '0' && *src <= '9')
+		    count = (count*10) + *(src++) - '0';
+	    }
+	    else
+		count = -1;		/* for naked + & - */
+	    if (count == 0)		/* +0 goes to beginning of line */
+		addr = bseekeol(addr);
+	    else {
+		addr = nextline((c=='+'), addr, count);
+		if (c=='-' && addr > 0)
+		    addr = bseekeol(addr);
+	    }
+	    if (addr >= bufmax)
+		addr = -1;
+	}
+    }
+    *idx = addr;
+    return(src);
+}
+
+int PROC
+nextline(advance,dest,count)
+bool advance;
+int dest,count;
+{
+    if (advance)
+	do {
+	    dest = fseekeol(dest) + 1;
+	    count--;
+	} while (count>0 && dest<bufmax);
+    else
+	do {
+	    dest = bseekeol(dest) - 1;
+	    count--;
+	} while (count>0 && dest>=0);
+    return(dest);
+}
+
+int PROC
+fseekeol(origin)
+int origin;
+{
+    return(origin + scan(bufmax-origin-1,'=',EOL,&core[origin]));
+}
+
+int PROC
+bseekeol(origin)
+int origin;
+{
+    return(origin + scan(-origin,'=',EOL,&core[origin-1]));
+}
+
+/* get something from the context table */
+
+int PROC
+getcontext(c,begline)
+char c;
+bool begline;
+{
+    int i;
+    
+    if (c == '\'')
+	c = '`';
+    if (c >= '`' && c <= 'z')
+	i = contexts[c-'`'];
+    else
+	i = -1;
+    if (begline && i>=0)
+	return(bseekeol(i));
+    return(i);
+}

src/cmd/levee/flexcall.c

@@ -0,0 +1,122 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2007 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+/*
+ * flexos interface for levee (Metaware C)
+ */
+#include "levee.h"
+
+#if OS_FLEXOS
+#include <flexos.h>
+#include <ctype.h>
+
+static int oldkmode;
+static int oldsmode;
+
+int
+min(a,b)
+{
+    return (a>b) ? b : a;
+}
+
+int
+max(a,b)
+{
+    return (a<b) ? b : a;
+}
+
+strput(s)
+char *s;
+{
+    s_write(0x01, 1L, s, (long)strlen(s), 0L);
+}
+
+char *
+basename(s)
+char *s;
+{
+    char *strrchr();
+    char *p;
+
+    if ((p=strrchr(s,'/')) || (p=strrchr(s,'\\')) || (p = strrchr(s,':')))
+	return 1+p;
+    return s;
+}
+
+getKey()
+{
+    char c;
+
+    s_read(0x0101, 0L, &c, 1L, 0L);
+    return c;
+}
+
+initcon()
+{
+    CONSOLE tty;
+
+    s_get(T_CON, 1L, &tty, SSIZE(tty));
+    oldkmode = tty.con_kmode;
+    oldsmode = tty.con_smode;
+    tty.con_kmode = 0x0667;
+    tty.con_smode = 0;
+    s_set(T_CON, 1L, &tty, SSIZE(tty));
+}
+
+fixcon()
+{
+    CONSOLE tty;
+
+    s_get(T_CON, 1L, &tty, SSIZE(tty));
+    tty.con_kmode = oldkmode;
+    tty.con_smode = oldsmode;
+    s_set(T_CON, 1L, &tty, SSIZE(tty));
+}
+
+char *
+strdup(s)
+char *s;
+{
+    char *malloc();
+    char *p;
+
+    if (p=malloc(strlen(s)+1))
+	strcpy(p, s);
+    return p;
+}
+
+getpid()
+{
+    PROCESS myself;
+
+    s_get(T_PDEF, 0L, &myself, SSIZE(myself));
+
+    return myself.ps_pid;
+}
+
+strlwr(s)
+char *s;
+{
+    while (*s) {
+	if (isupper(*s))
+	    *s += 32;
+	s++;
+    }
+}
+#endif

src/cmd/levee/gemcall.c

@@ -0,0 +1,70 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2007 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+/*
+ * Gemdos (Atari ST) bindings for levee (Alcyon/Sozobon C)
+ */
+#include "levee.h"
+
+#if OS_ATARI
+#include <atari\osbind.h>
+
+strput(s)
+register char *s;
+{
+    write(1, s, strlen(s));
+}
+
+
+zwrite(s,len)
+char *s;
+{
+    write(1, s, len);
+}
+
+
+min(a,b)
+register int a, b;
+{
+    return (a<b)?a:b;
+}
+
+
+max(a,b)
+register int a, b;
+{
+    return (a>b)?a:b;
+}
+
+
+unsigned
+getKey()
+/* get input from the keyboard. All odd keys (function keys, et al) that
+ * do not produce a character have their scancode orred with $80 and returned.
+ */
+{
+    unsigned c;
+    long key;
+
+    c = (key = Crawcin()) & 0xff;
+    if (!c)
+	c = (((unsigned)(key>>16))|0x80) & 0xff;
+    return c;
+} /* getKey */
+#endif /*OS_ATARI*/

src/cmd/levee/globals.c

@@ -0,0 +1,547 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2008 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+/* global declarations */
+
+#include "levee.h"
+#define GLOBALS
+
+char lastchar,		/* Last character read via peekc */
+     ch;		/* Global command char */
+
+exec_type mode;			/* editor init state */
+int lastexec = 0;		/* last exec command */
+
+int contexts['z'-'`'+1];	/* Labels */
+
+		/* C O N S T A N T S */
+
+bool adjcurr[PARA_BACK+1],
+     adjendp[PARA_BACK+1];
+
+		/* A R G U M E N T S */
+char startcmd[80] = "";	/* initial command after read */
+char **argv;		/* Arguments */
+int  argc=0,		/* # arguments */
+     pc=0;		/* Index into arguments */
+#if 0
+struct stat thisfile;	/* status on current file, for writeout... */
+#endif
+
+		/* M A C R O   S T U F F */
+struct macrecord mbuffer[MAXMACROS];
+struct tmacro mcr[NMACROS];		/* A place for executing macros */
+
+		/* S E A R C H   S T U F F */
+char dst[80] = "",			/* last replacement pattern */
+     lastpatt[80] = "",			/* last search pattern */
+     pattern[MAXPAT] = "";		/* encoded last pattern */
+
+int RE_start[9],			/* start of substitution arguments */
+    RE_size [9],			/* size of substitution arguments */
+    lastp;				/* end of last pattern */
+
+struct undostack undo;			/* To undo a command */
+
+
+		/* R A N D O M   S T R I N G S */
+
+char instring[200],	/* Latest input */
+     filenm[80] = "",	/* Filename */
+     altnm[80] = "";	/* Alternate filename */
+char gcb[16];		/* Command buffer for mutations of insert */
+
+char undobuf[40];
+char undotmp[40];
+char yankbuf[40];
+
+HANDLE uread,		/* reading from the undo stack */
+       uwrite;		/* writing to the undo stack */
+
+			    /* B U F F E R S */
+char rcb[256];		/* last modification command */
+char *rcp;		/* this points at the end of the redo */
+char core[SIZE+1];	/* data space */
+
+struct ybuf yank;	/* last deleted/yanked text */
+
+
+/* STATIC INITIALIZATIONS: */
+
+/* ttydef stuff */
+
+#if OS_ATARI | USE_TERMCAP
+int LINES, COLS;
+#endif
+
+#if TTY_ZTERM
+char *TERMNAME = "zterm",
+     *HO  = "\001",	/* goto top of screen */
+     *UP  = "\002",	/* move up 1 line? */
+     *CE  = "\003",	/* clear to end of line */
+     *CL  = "\004",	/* clearscreen */
+     *OL  = "\005",	/* open current line down */
+     *UpS = "\006",	/* scroll up 1 line */
+     *BELL= "\007",	/* ring the bell */
+     *CM  = "yes",	/* cursor movement exists */
+     *CURoff,
+     *CURon;
+#endif /*ZTERM*/
+
+#if TTY_ANSI
+#if OS_DOS
+char *TERMNAME = "braindamaged ansi",
+#else
+char *TERMNAME = "hardwired ansi",
+#endif
+     *HO  = "\033[H",
+     *UP  = "\033[A",
+     *CE  = "\033[K",
+     *CL  = "\033[H\033[J",
+#if OS_DOS
+     *OL  = NULL,
+     *UpS = NULL,
+#else
+     *OL  = "\033[L",
+     *UpS = "\033[L",
+#endif
+     *BELL= "\007",
+     *CM  = "\033[%d;%dH",
+     *CURoff,
+     *CURon;
+#endif /*TTY_ANSI*/
+
+#if TTY_VT52
+#if OS_ATARI
+char *TERMNAME = "Atari ST",
+#else
+#if OS_FLEXOS
+char *TERMNAME = "Flexos console",
+#else
+char *TERMNAME = "hardwired vt52",
+#endif /*OS_FLEXOS*/
+#endif /*OS_ATARI*/
+     *HO  = "\033H",
+     *UP  = "\033A",
+     *CE  = "\033K",
+     *CL  = "\033E",
+     *OL  = "\033L",
+     *BELL= "\007",
+     *CM  = "\033Y??",
+#if OS_FLEXOS
+     *UpS = NULL,	/* Reverse scrolling is painfully slow */
+#else
+     *UpS = "\033I",
+#endif
+     *CURoff= "\033f",
+     *CURon = "\033e";
+#endif /*TTY_VT52*/
+
+#if USE_TERMCAP
+bool CA, canUPSCROLL;
+char FkL, CurRT, CurLT, CurUP, CurDN;
+
+char *TERMNAME,		/* will be set in termcap handling */
+     *HO,
+     *UP,
+     *CE,
+     *CL,
+     *OL,
+     *BELL,
+     *CM,
+     *UpS,
+     *CURoff,
+     *CURon;
+#endif /*USE_TERMCAP*/
+
+char Erasechar = ERASE,			/* our erase character */
+     eraseline = 'X'-'@';		/* and line-kill character */
+
+char fismod[] = "File is modified",	/* File is modified message */
+     fisro[] = "File is readonly";	/* when you can't write the file */
+
+char *excmds[] = {
+	"print",	/* lines to screen */
+	"quit",		/* quit editor */
+	"read",		/* add file to buffer */
+	"edit",		/* replace buffer with file */
+	"write",	/* write out file */
+	"wq",		/* write file and quit */
+	"next",		/* make new arglist or traverse this one */
+	"substitute",	/* pattern */
+	"xit",		/* write changes and quit */
+	"file",		/* show/set file name */
+	"set",		/* options */
+	"rm",		/* a file */
+	"previous",	/* back up in arglist */
+	"delete",	/* lines from buffer */
+	"=",		/* tell line number */
+	"yank",		/* lines from buffer */
+	"put",		/* back yanked lines */
+	"visual",	/* go to visual mode */
+	"exec",		/* go to exec mode */
+	"insert",	/* text below current line */
+	"open",		/* insert text above current line */
+	"change",	/* lines */
+	"undo",		/* last change */
+	"!",		/* shell escape */
+	"map",		/* keyboard macro */
+	"unmap",	/* keyboard macro */
+	"source",	/* read commands from file */
+	"version",	/* print version # */
+	"args",		/* print argument list */
+	"rewind",	/* rewind argument list */
+	NULL
+};
+
+char wordset[] = "0123456789$_#ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+char spaces[] = { TAB,EOL,' ',0 };
+
+int shiftwidth = 4,
+#if USE_TERMCAP | OS_ATARI
+    dofscroll,
+#else
+    dofscroll  = LINES/2,
+#endif
+    tabsize    = 8;
+int autoindent = YES,
+    autocopy   = NO,
+    autowrite  = YES,
+    wrapscan   = YES,
+    overwrite  = YES,
+    beautify   = YES,
+    list       = NO,
+    magic      = YES,
+    bell       = YES,
+#if OS_ATARI
+    mapslash,
+#endif
+    ignorecase = NO;
+
+struct variable vars[]={
+    {"terminal",  "",	VSTR,	V_CONST,	(void*)&TERMNAME   },
+    {"shiftwidth","sw",	VINT,	0,		(void*)&shiftwidth },
+    {"scroll",	  "",	VINT,	0,		(void*)&dofscroll  },
+    {"tabsize",   "ts",	VINT,	V_DISPLAY,	(void*)&tabsize    },
+    {"autoindent","ai",	VBOOL,	0,		(void*)&autoindent },
+    {"autocopy",  "ac",	VBOOL,	0,		(void*)&autocopy   },
+    {"autowrite", "aw",	VBOOL,	0,		(void*)&autowrite  },
+    {"wrapscan",  "ws",	VBOOL,	0,		(void*)&wrapscan   },
+    {"overwrite", "ow",	VBOOL,	0,		(void*)&overwrite  },
+    {"beautify",  "be",	VBOOL,	0,		(void*)&beautify   },
+    {"list",	  "",	VBOOL,	V_DISPLAY,	(void*)&list       },
+    {"magic",	  "",	VBOOL,	0,		(void*)&magic      },
+    {"ignorecase","ic",	VBOOL,	0,		(void*)&ignorecase },
+    {"bell",      "",	VBOOL,	0,		(void*)&bell       },
+#if OS_ATARI
+    {"mapslash",  "ms", VBOOL,	0,		(void*)&mapslash   },
+#endif
+    {NULL}
+};
+
+/* For movement routines */
+int setstep[2] = {-1,1};
+
+/* Where the last diddling left us */
+struct coord curpos={0, 0};
+
+    /* initialize the buffer */
+int  bufmax = 0,		/* End of file here */
+     lstart = 0, lend = 0,	/* Start & end of current line */
+     ptop   = 0, pend = 0,	/* Top & bottom of CRT window */
+     curr   = 0,		/* Global cursor pos */
+     xp     = 0, yp   = 0,	/* Cursor window position */
+     count  = 0;		/* Latest count */
+
+bool modified= NO,		/* File has been modified */
+     readonly= NO,		/* is this file readonly? */
+     needchar= YES,		/* Peekc flag */
+     deranged= NO,		/* Up-arrow || down-arrow left xpos in Oz. */
+     indirect= NO,		/* Reading from an indirect file?? */
+     redoing = NO,		/* doing a redo? */
+     xerox   = NO,		/* making a redo buffer? */
+     newfile = YES,		/* Editing a new file? */
+     newline = NO,		/* Last insert/delete included a EOL */
+     lineonly= NO,		/* Dumb terminal? */
+     zotscreen=NO,		/* ask for [more] in execmode */
+     diddled = NO;		/* force new window in editcore */
+
+int  macro = -1;    		/* Index into MCR */
+char lsearch = 0;		/* for N and n'ing... */
+
+/* movement, command codes */
+
+cmdtype movemap[256]={
+    /*^@*/ BAD_COMMAND,
+    /*^A*/ DEBUG_C,
+    /*^B*/ HARDMACRO,
+    /*^C*/ BAD_COMMAND,
+    /*^D*/ WINDOW_UP,
+    /*^E*/ HARDMACRO,
+    /*^F*/ HARDMACRO,
+    /*^G*/ FILE_C,
+    /*^H*/ GO_LEFT,		/* also leftarrow  */
+    /*^I*/ REDRAW_C,
+    /*^J*/ GO_DOWN,		/* also downarrow  */
+    /*^K*/ GO_UP,		/* also uparrow    */
+    /*^L*/ GO_RIGHT,		/* also rightarrow */
+    /*^M*/ CR_FWD,
+    /*^N*/ BAD_COMMAND,
+    /*^O*/ BAD_COMMAND,
+    /*^P*/ BAD_COMMAND,
+    /*^Q*/ BAD_COMMAND,
+    /*^R*/ BAD_COMMAND,
+    /*^S*/ BAD_COMMAND,
+    /*^T*/ BAD_COMMAND,
+    /*^U*/ WINDOW_DOWN,
+    /*^V*/ BAD_COMMAND,
+    /*^W*/ BAD_COMMAND,
+    /*^X*/ BAD_COMMAND,
+    /*^Y*/ HARDMACRO,
+    /*^Z*/ BAD_COMMAND,
+    /*^[*/ BAD_COMMAND,
+    /*^\*/ BAD_COMMAND,
+    /*^]*/ BAD_COMMAND,
+    /*^^*/ BAD_COMMAND,
+    /*^_*/ BAD_COMMAND,
+    /*  */ GO_RIGHT,
+    /*! */ EXEC_C,
+    /*" */ BAD_COMMAND,
+    /*# */ BAD_COMMAND,
+    /*$ */ TO_EOL,
+    /*% */ MATCHEXPR,
+    /*& */ RESUBST_C,
+    /*\ */ TO_MARK_LINE,
+    /*( */ SENT_BACK,
+    /*) */ SENT_FWD,
+    /** */ BAD_COMMAND,
+    /*+ */ CR_FWD,
+    /*, */ BAD_COMMAND,
+    /*- */ CR_BACK,
+    /*. */ REDO_C,
+    /*/ */ PATT_FWD,
+    /*0 */ TO_COL,
+    /*1 */ BAD_COMMAND,
+    /*2 */ BAD_COMMAND,
+    /*3 */ BAD_COMMAND,
+    /*4 */ BAD_COMMAND,
+    /*5 */ BAD_COMMAND,
+    /*6 */ BAD_COMMAND,
+    /*7 */ BAD_COMMAND,
+    /*8 */ BAD_COMMAND,
+    /*9 */ BAD_COMMAND,
+    /*: */ COLIN_C,
+    /*; */ BAD_COMMAND,
+    /*< */ ADJUST_C,
+    /*= */ BAD_COMMAND,
+    /*> */ ADJUST_C,
+    /*? */ PATT_BACK,
+    /*@ */ BAD_COMMAND,
+    /*A */ A_AT_END,
+    /*B */ BACK_WD,
+    /*C */ HARDMACRO,
+    /*D */ HARDMACRO,
+    /*E */ BAD_COMMAND,
+    /*F */ BACK_CHAR,
+    /*G */ GLOBAL_LINE,
+    /*H */ PAGE_BEGIN,
+    /*I */ I_AT_NONWHITE,
+    /*J */ JOIN_C,
+    /*K */ BAD_COMMAND,
+    /*L */ PAGE_END,
+    /*M */ PAGE_MIDDLE,
+    /*N */ BSEARCH,
+    /*O */ OPENUP_C,
+    /*P */ PUT_AFTER,
+    /*Q */ EDIT_C,
+    /*R */ BIG_REPL_C,
+    /*S */ BAD_COMMAND,
+    /*T */ BACKTO_CHAR,
+    /*U */ BAD_COMMAND,
+    /*V */ BAD_COMMAND,
+    /*W */ FORWD,
+    /*X */ HARDMACRO,
+    /*Y */ HARDMACRO,
+    /*Z */ ZZ_C,
+    /*[ */ BAD_COMMAND,
+    /*\ */ BAD_COMMAND,
+    /*] */ BAD_COMMAND,
+    /*^ */ NOTWHITE,
+    /*_ */ BAD_COMMAND,
+    /*` */ TO_MARK,
+    /*a */ APPEND_C,
+    /*b */ BACK_WD,
+    /*c */ CHANGE_C,
+    /*d */ DELETE_C,
+    /*e */ FORWD,
+    /*f */ TO_CHAR,
+    /*g */ BAD_COMMAND,
+    /*h */ GO_LEFT,
+    /*i */ INSERT_C,
+    /*j */ GO_DOWN,
+    /*k */ GO_UP,
+    /*l */ GO_RIGHT,
+    /*m */ MARKER_C,
+    /*n */ FSEARCH,
+    /*o */ OPEN_C,
+    /*p */ PUT_BEFORE,
+    /*q */ BAD_COMMAND,
+    /*r */ REPLACE_C,
+    /*s */ HARDMACRO,
+    /*t */ UPTO_CHAR,
+    /*u */ UNDO_C,
+    /*v */ BTO_WD,
+    /*w */ TO_WD,
+    /*x */ HARDMACRO,
+    /*y */ YANK_C,
+    /*z */ REWINDOW,
+    /*{ */ PARA_BACK,
+    /*| */ TO_COL,
+    /*} */ PARA_FWD,
+    /*~ */ TWIDDLE_C,
+    /*^?*/ BAD_COMMAND,
+    /*80*/ BAD_COMMAND,
+    /*81*/ BAD_COMMAND,
+    /*82*/ BAD_COMMAND,
+    /*83*/ BAD_COMMAND,
+    /*84*/ BAD_COMMAND,
+    /*85*/ BAD_COMMAND,
+    /*x6*/ BAD_COMMAND,
+    /*x7*/ BAD_COMMAND,
+    /*x8*/ BAD_COMMAND,
+    /*x9*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND,
+    /*xx*/ BAD_COMMAND
+    };

src/cmd/levee/grep.h

@@ -0,0 +1,36 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2007 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+#define LEND	'$'
+#define LSTART	'^'
+#define LITCHAR	'c'
+#define ANY	'.'
+#define CCL	'['
+#define NCCL	'!'
+#define DASH	'-'
+#define CCLEND	']'
+#define	NEGATE	'^'
+#define CLOSURE	'*'
+#define ESCAPE	'\\'
+#define	TOKENB	'<'
+#define	TOKENE	'>'
+
+#define ARGSTART '('
+#define ARGEND ')'
+#define AMPERSAND '&'

src/cmd/levee/insert.c

@@ -0,0 +1,156 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1982-2007 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+#include "levee.h"
+#include "extern.h"
+
+int PROC
+insertion(count, openflag, dp, yp, visual)
+int count, openflag, *dp, *yp;
+bool visual;
+{
+    char cmd, c;
+    int rp;		/* number of spaces to diddle */
+    int	ts, ss;		/* tabs && spaces to insert */
+    register int cp;	/* current position */
+    int i;		/* random index */
+    int	endd;		/* last open place */
+    register int rsize;	/* size of upper buffer */
+    int	currDLE = 0;	/* what DLE is now */
+    int	len;		/* full insert size */
+    bool Dflag;
+
+    if (openflag != 0) {	/* opening a line above || below */
+	if (openflag<0 && bufmax>0 && curr<bufmax) {
+	    curr = 1+lend;
+	    if (visual)
+		zwrite("\n", 1);
+	}
+	else {			/* open above current line */
+	    (*yp)--;
+	    curr = lstart;
+	}
+	if (autoindent)
+	    currDLE = findDLE(lstart, &i, skipws(lstart),0);
+	if (visual) {
+#if TTY_VT52
+	    if (OL) {
+#else
+	    if (OL && (*yp) < LINES-2) {
+#endif
+		strput(OL);
+		(*yp)++;
+		curpos.y = *yp;
+	    }
+	    else {
+		mvcur(1+(*yp), 0);
+		strput(CE);
+	    }
+	}
+	mvcur(-1, currDLE);
+    }
+    else {
+	if (autoindent)
+	    currDLE = findDLE(lstart, &i, curr, 0);
+	if (curr == i) {
+	    if (!delete_to_undo(&undo, lstart, i-lstart))
+		return(-1);
+	    curr = lstart;
+	}
+    }
+
+    rsize = (bufmax-curr);		/* amount of stuff above curr */
+    endd = SIZE - rsize;		/* split the buffer */
+    if (rsize > 0)
+	moveright(&core[curr], &core[endd], rsize);
+
+    cp = curr;
+    do {				/* Insert loop */
+	Dflag = (cp==0 || core[cp-1]==EOL);
+	do {
+	    if (Dflag)
+		while ((cmd=peekc()) == '' || cmd == '') {
+		    if (readchar() == '')
+			currDLE = min(COLS,currDLE+shiftwidth);
+		    else
+			currDLE = max(0,currDLE-shiftwidth);
+		    mvcur(-1, currDLE);
+		}
+	} while (!(c = line(core, cp, endd-1, &len)));
+	if (Dflag && (len > 0 || c == ESC)) {
+	    /* makeDLE : optimize leading whitespace for insert */
+	    currDLE = findDLE(cp, &rp, cp+len, currDLE);
+	    if (rp > cp) {
+		len -= (rp-cp);
+		moveleft(&core[rp], &core[cp], len);	/* squash whitespace */
+	    }
+	    if (currDLE > 0) {				/* create DLE indent */
+		ts = currDLE / tabsize;
+		ss = currDLE % tabsize;
+		moveright(&core[cp], &core[cp+ts+ss], len);
+		len += (ts+ss);
+		fillchar(&core[cp   ], ts, TAB);
+		fillchar(&core[cp+ts], ss, 32);
+	    }
+	}
+	cp += len;
+	if (c == EOL) {		/* Diddle-Diddle */
+	    core[cp++] = EOL;		/* add in a \n */
+	    strput(CE);				/* clear this line */
+	    println();
+	    if (visual) {
+#if OS_RMX
+		/* at OL at bottom kludge... */
+		if (OL && (*yp) < LINES-2) {
+#else
+		if (OL) {
+#endif
+		    strput(OL);
+		    (*yp)++;
+		}
+		else
+		    strput(CE);
+	    }
+	    if (!autoindent)		/* reset currDLE? */
+		currDLE = 0;
+	    mvcur(-1, currDLE);
+	}
+    } while (c != ESC && cp <= endd-INSSIZE);
+    *dp = cp;					/* start display here */
+
+    if (count > 1) {				/* repeated insertion */
+	len = cp-curr;
+	if ((count-1)*len < endd-cp)
+	    for (i = 1;i <count;i++) {
+		moveright(&core[cp-len], &core[cp], len);
+		cp += len;
+	    }
+    }
+
+    if (openflag != 0		/* open or insert at end of buffer */
+	    || (rsize < 1 && cp > curr && core[cp-1] != EOL))
+	core[cp++] = EOL;
+    len = cp-curr;
+
+    if (rsize > 0)	/* if not at end of buffer, stitch things together */
+	moveleft(&core[endd], &core[cp], rsize);
+    insert_to_undo(&undo, curr, len);
+    core[bufmax] = EOL;
+    return(cp);
+}

src/cmd/levee/levee.h

@@ -0,0 +1,386 @@
+/*
+ * LEVEE, or Captain Video;  A vi clone
+ *
+ * Copyright (c) 1980-2008 David L Parsons
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, without or
+ * without modification, are permitted provided that the above
+ * copyright notice and this paragraph are duplicated in all such
+ * forms and that any documentation, advertising materials, and
+ * other materials related to such distribution and use acknowledge
+ * that the software was developed by David L Parsons (orc@pell.chi.il.us).
+ * My name may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ *
+ *			  Levee v3.C
+ *   C version for Unix/Atari ST/MS-DOS/OS-2/FlexOs/iRMX/etc
+ *            Pascal version for UCSD Pascal 4.X
+ *
+ *	written fall 82' - now (approx) by David L. Parsons.
+ *
+ *		  many patches, suggestions,
+ *		and impractical design goals by:
+ *			Jim Bolland,
+ *			John Plocher,
+ *			John Tainter
+ */
+#ifndef LEVEE_D
+
+#define LEVEE_D
+
+#include "config.h"
+
+#ifndef TRUE
+#define	TRUE	(1)	/* Nobody defines TRUE & FALSE, so I will do */
+#define	FALSE	(0)	/* it myself */
+#endif
+
+#define	HANDLE	int	/* default file handle type */
+
+#define PROC		/* for magic function types (MSDOS) */
+#define VOID	void	/* ancient creaking C compilers won't understand void */
+
+/*
+ * Compilation defines for different systems.
+ */
+
+#if OS_ATARI
+
+#include <stdio.h>
+
+#define	void	int	/* Alcyon C don't know void */
+
+/* extractions from osbind.h */
+#define OPEN_OLD(n)		gemdos(0x3d,n,/*open mode*/0)
+#define OPEN_NEW(n)		gemdos(0x3c,n,/*permissions*/0)
+#define CLOSE_FILE(f)		gemdos(0x3e,f)
+#define SEEK_POSITION(f,o,m)	gemdos(0x42,(long)(o),f,m)
+#define READ_TEXT(f,b,c)	gemdos(0x3f,f,(long)(c),b)
+#define WRITE_TEXT(f,b,c)	gemdos(0x40,f,(long)(c),b)
+
+extern char *malloc();
+extern long gemdos();
+
+#endif /*OS_ATARI*/
+
+#if OS_RMX
+#include <:inc:stdio.h>
+#include <:inc:udi.h>
+
+#define OPEN_OLD(n)		open(n, /*open mode*/0)
+#define OPEN_NEW(n)		creat(n,/*permissions*/0)
+#define CLOSE_FILE(f)		close(f)
+#define SEEK_POSITION(f,o,m)	lseek((f),(long)(o),(m))
+#define READ_TEXT(f,p,c)	read((f),(p),(unsigned)(c))
+#define WRITE_TEXT(f,p,c)	write((f),(p),(unsigned)(c))
+
+#define zwrite(p,s)	write(1,(p), (unsigned)(s))
+
+#endif /*OS_RMX*/
+
+#if OS_DOS
+
+#include <stdio.h>
+#include <fcntl.h>
+
+#define OPEN_OLD(n)		open(n, O_RDONLY|O_BINARY)
+#define OPEN_NEW(n)		open(n, O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0666)
+#define CLOSE_FILE(f)		close(f)
+#define SEEK_POSITION(f,o,m)	lseek(f, (long)(o), (m))
+#define READ_TEXT(f,p,c)	read(f, p, (int)(c))
+#define WRITE_TEXT(f,p,c)	write(f, p, (int)(c))
+
+#define zwrite(p,s)	WRITE_TEXT(fileno(stdout), p, s)
+
+#undef PROC
+#define PROC	_fastcall
+
+#include "proto.h"
+
+#endif /*OS_DOS*/
+
+#if OS_UNIX
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <ctype.h>
+
+#define OPEN_OLD(n)		open(n, O_RDONLY)
+#define OPEN_NEW(n)		open(n, O_WRONLY|O_CREAT|O_TRUNC, 0666)
+#define CLOSE_FILE(f)		close(f)
+#define SEEK_POSITION(f,o,m)	lseek(f, (long)(o), (m))
+#define READ_TEXT(f,p,c)	read(f, p, (int)(c))
+#define WRITE_TEXT(f,p,c)	write(f, p, (int)(c))
+
+#define zwrite(p,s)		fwrite(p, 1, s, stdout)
+
+#endif /*OS_UNIX*/
+
+#if OS_FLEXOS
+
+#include <stdio.h>
+
+#define OPEN_OLD(n)		s_open(m,0x08)		/* note reversed parameters! */
+#define OPEN_NEW(n)		s_create(0,0,n,0,0/*mode*/,0)
+#define CLOSE_FILE(f)		s_close(0,f)		/* Full close on handle */
+#define SEEK_POSITION(f,o,m)	s_seek((m&03)<<9, f, o)
+#define	READ_TEXT(f,p,c)	s_read(0x0100,(long)(f),p,(long)(c),0L)
+#define	WRITE_TEXT(f,p,c)	s_write(0x0101,(long)(f),p,(long)(c),0L)
+
+#define	zwrite(p,s)		s_write(0x0101, 1L, p, (long)(s),0L)
+
+#define	unlink(n)		s_delete(0, n)
+#define	rename(a,b)		s_rename(0, a, b)
+
+/* OPEN_OLD mode flags */
+
+#undef	HANDLE
+#define	HANDLE	long
+
+#endif /*OS_FLEXOS*/
+
+#define bool int
+
+/* ttydef stuff */
+#if !(OS_ATARI | USE_TERMCAP)
+
+#ifndef LINES
+#define LINES	25
+#endif  /*LINES*/
+#define COLS	79
+
+#endif
+
+#define	YES	1
+#define	NO	0
+
+#define UPARROW	11
+#define DNARROW	10
+#define LTARROW	erase
+#define RTARROW	12
+
+#if !USE_TERMCAP
+#define CA	TRUE
+#if !(OS_DOS||OS_FLEXOS)
+#define canUPSCROLL 1
+#endif
+#endif
+
+/* nospecific stuff */
+#define MAGICNUMBER  42
+#define hell_freezes_over  FALSE
+#define BUGS	7	/* sometime when you least expect it.. */
+
+#define DW	23	/* Delete Word */
+#define EOL	10	/* End Of Line */
+#define DLE	16	/* Space compression lead-in */
+#define ESC	27	/* Escape */
+
+/* hardwired line kill and erase character for non-unix machines */
+#define DEL	21	/* ^U */
+#if RMX
+#define ERASE	127
+#else
+#define ERASE	8	/* ^H */
+#endif
+
+#define TAB	9
+    
+	/* variable types */
+#define VBOOL	0
+#define VINT	1
+#define VSTR	2
+
+#define ERR	(-1)
+
+		/* Undostack commands */
+#define U_ADDC	'A'
+#define U_MOVEC	'M'
+#define U_DELC	'D'
+
+		/* magic things for find */
+#define MAXPAT	((int)300)
+
+		/* exec mode commands */
+#define	EX_CR		(ERR-1)
+#define EX_PR		0
+#define EX_QUIT		1
+#define EX_READ		2
+#define EX_EDIT		3
+#define EX_WRITE	4
+#define EX_WQ		5
+#define EX_NEXT 	6
+#define EX_SUBS 	7
+#define EX_XIT		8
+#define EX_FILE 	9
+#define EX_SET		10
+#define EX_RM		11
+#define EX_PREV 	12
+#define EX_DELETE	13
+#define EX_LINE		14
+#define EX_YANK		15
+#define EX_PUT		16
+#define EX_VI		17
+#define EX_EX		18
+#define EX_INSERT	19
+#define EX_OPEN		20
+#define EX_CHANGE	21
+#define EX_UNDO		22
+#define EX_ESCAPE	23
+#define EX_MAP		24
+#define EX_UNMAP	25
+#define EX_SOURCE	26
+#define EX_VERSION	27
+#define EX_ARGS		28
+#define	EX_REWIND	29
+
+		/* movement return states */
+#define LEGALMOVE	0
+#define BADMOVE		1
+#define ESCAPED		2
+#define findstates char
+
+		/* command codes */
+#define BAD_COMMAND	0
+		/*visual movement*/
+#define GO_RIGHT	1
+#define GO_LEFT		2
+#define GO_UP		3
+#define GO_DOWN		4
+#define FORWD		5
+#define TO_WD		6
+#define BACK_WD		7
+#define BTO_WD		8
+#define NOTWHITE	9
+#define TO_COL		10
+#define TO_EOL		11
+#define MATCHEXPR	12
+#define TO_CHAR		13
+#define UPTO_CHAR	14
+#define BACK_CHAR	15
+#define BACKTO_CHAR	16
+#define SENT_FWD	17
+#define SENT_BACK	18
+#define PAGE_BEGIN	19
+#define PAGE_END	20
+#define PAGE_MIDDLE	21
+#define CR_FWD		22
+#define CR_BACK		23
+#define PATT_FWD	24
+#define PATT_BACK	25
+#define FSEARCH		26
+#define BSEARCH		27
+#define GLOBAL_LINE	28
+#define TO_MARK		29
+#define TO_MARK_LINE	30
+#define PARA_FWD	31
+#define PARA_BACK	32
+		/*modifications*/
+#define DELETE_C	39
+#define EXEC_C		40
+#define ADJUST_C	41
+#define CHANGE_C	42
+#define YANK_C		43
+#define INSERT_C	44
+#define APPEND_C	45
+#define I_AT_NONWHITE	46
+#define A_AT_END	47
+#define OPEN_C		48
+#define OPENUP_C	49
+#define REPLACE_C	50
+#define TWIDDLE_C	51
+#define RESUBST_C	52
+#define JOIN_C		53
+#define UNDO_C		54
+#define BIG_REPL_C	55
+#define PUT_BEFORE	56
+#define PUT_AFTER	57
+		/*everything else*/
+#define HARDMACRO	70
+#define REWINDOW	71
+#define ZZ_C		72
+#define DEBUG_C		73
+#define FILE_C		74
+#define WINDOW_UP	75
+#define WINDOW_DOWN	76
+#define REDRAW_C	77
+#define MARKER_C	78
+#define REDO_C		79
+#define EDIT_C		80
+#define COLIN_C		81
+		    /*macros*/
+#define SOFTMACRO	100
+#define INSMACRO	101
+#define cmdtype		char
+
+		/* exec mode states */
+#define E_VISUAL 0
+#define E_INIT	 1
+#define E_EDIT	 2
+#define exec_type	char
+
+		/* various sizes */
+#define INSSIZE	 ((int)80)		/* Insert string size */
+#define FSIZE	 ((int)39)		/* File string size */
+#ifndef SIZE
+# define SIZE	 ((int)32760)		/* Edit buffer size */
+#endif
+
+#define SBUFSIZE  ((int)4096)		/* Incore yank buffer size */
+#define MAXMACROS 32			/* Maximum # of macros */
+#define NMACROS	  9			/* Nexting level for macros */
+
+#define PAGESIZE ((int)1024)		/* Bytes per block */
+
+struct coord {		/* Screen Coordinate */
+    int x,y;
+};
+
+struct ybuf {		/* Yank Buffer */
+    int size;				/* Bytes yanked */
+    bool lines,				/* Yanked whole lines? */
+	has_eol;			/* Yanked a EOL? */
+    char stuff[SBUFSIZE];		/* The stuff */
+};
+
+struct undostack {	/* Undo Stack Descriptor */
+    int blockp,				/* block address of core block */
+	ptr;				/* offset within coreblock */
+    int coreblock[PAGESIZE];		/* core block */
+};
+
+union optionrec {	/* Black Magic Option Structure */
+    int valu;				/* if integer, the value */
+    char *strp;				/* or if string, a pointer to it */
+};
+
+struct macrecord {	/* Macro Descriptor */
+    char token;				/* Character mapped */
+    cmdtype oldmap;			/* Old value in movemap */
+    char *m_text;			/* Replacement text */
+};
+		    
+struct tmacro {		/* For running a macro */
+    char *mtext,	/* Pointer to macro text */
+	 *ip;		/* Pointer into macro text */
+    int  m_iter;	/* Number of times to execute */
+};
+
+#define V_CONST	1	/* this option cannot be modified */
+#define V_DISPLAY 2	/* this option affects the display */
+
+struct variable {	/* Settable Variable Record */
+    char *v_name;		/* full name */
+    char *v_abbr;		/* abbreviated name */
+    int v_tipe;			/* what kind of variable */
+    int v_flags;		/* special attributes... */
+    union optionrec *u;		/* pointer to it */
+};
+#endif /*LEVEE_D*/

src/cmd/levee/lv.1

@@ -0,0 +1,955 @@
+.TH LEVEE 1 "29 August 1998" "Mastodon Linux"
+.SH NAME
+.B levee
+\-
+A Screen Oriented Editor.
+.SH SYNOPSIS
+.B levee
+[\fI+address\fR] [\fIfile \fB...\fR]
+.SH DESCRIPTION
+Levee is a screen oriented  editor based on the  Unix editor
+"vi".  It provides a terse,  powerful way to enter and edit text
+(however,  if you want a word-processor,  you're better off with
+WordStar.)
+
+Levee is a moded editor.  It operates in 3 modes  -- visual,
+command, and insert.  Most of the editing work is done is visual
+mode,  file reading and  writing is  done in  command mode,  and
+insert mode does what you would expect.
+.PP
+When you enter Levee,  you may specify  an  address to start
+editing at.  These addresses  are in the same  format as command
+mode addresses,  except that a naked + will put  you at the very
+end of the file.
+.PP
+Levee is copyright (c) 1982-2008 by David L. Parsons. (see
+the notice at the end of this document for distribution terms)
+
+.SH "COMMAND MODE COMMANDS"
+
+These commands are used for  editing new files,  writing
+modified files,  changing options, doing substitutions,  and
+a subset of  the visual commands.  They take as  input whole
+lines,  terminated  by  return (to execute),  or  escape (to
+abort.)
+     
+Command mode is reached by typing ":" or "Q" from visual
+mode.  If you enter command  mode by typing ":",  Levee will
+execute  one  command,   then return  to  visual  mode after
+prompting you  with  "[more]".   If you type anything except
+a space or return, Levee will accept another command, and so
+forth.  If,  however, you enter command mode via "Q",  Levee
+will  remain in  command mode  until  you enter the "visual"
+command.
+
+
+.SS "A NOTE ON COMMAND SYNTAX"
+.PP
+A command may be preceded by an optional line-range.  If
+you do not provide a line-range,  Levee will use the default
+line-range shown by the command.  A line-range is one or two
+address specifications in the following format:
+
+.RS
+(\fB.\fR|\fB$\fR|\fB'x\fR|\fB#\fR) [ (\fB+\fR|\fB-\fR) (\fB/\fIpatt\fB\fB/\fR|\fB?\fIpatt\fB?\fR|\fB#\fR) ]
+.TP
+.B \.
+current line.
+.TP
+.B $
+last line.
+.TP
+.B 'x
+the line with mark x on it.
+.TP
+.B #
+line #.
+.RE
+
+.PP
+For example, ".-5,.+5p" will print every line within ten
+lines of the current line.  "$-5" is the fifth line from the
+end of the file,  and "/end/+2"  is the second line past the
+next  occurrence  of  the  pattern "end".  Patterns  may  be
+regular expressions (see below.)
+
+Also,  a naked line-range will  set the current  line to
+the first line in the range  and print all the lines in that
+range. "1,10" sets the current line to 1,  then prints lines
+1 to 10.
+
+If you specify a non-existent line in a range, the command
+ will abort and Levee will tell you "bad address".
+
+.SS "Command mode commands"
+
+.TP
+.B    args
+show the current argument list, if one exists. The file that you
+are currently editing will be framed by '[' and ']'.
+
+.TP
+.IB    (.,.) change
+delete lines, then enter insert mode.
+
+.TP
+.IB    (.,.) delete
+delete lines. Deleted lines are stored in a Yank Buffer for
+later putback with "put".
+
+.TP
+.B    "edit[!] [file]"
+Discard the current file and start editing a new one. If
+changes were made to the current file, you must enter "edit!"
+to force Levee to discard the changes. If you do not specify
+a filename, Levee will try to reedit the current filename.
+
+When Levee reads in a new file, it will tell you how many
+bytes it read in, or [overflow] if the file is larger than the
+internal buffer (256000 bytes on most platforms; 20k on USCD
+Pascal.)
+
+.TP
+.B    execmode
+Remain in command mode until you use the "visual" command.
+
+.TP
+.BI    file [name]
+Echo what the current filename is, its status, and the current
+line. If you provide it with a name, it will change the filename
+to that.
+
+.TP
+.IB (.) insert
+Insert text above the current line. If you specify a line number,
+Levee will make that the current line, then insert above it.
+
+.RS
+.SS "Insert mode commands"
+.TP
+.B ^W
+back over the last word you entered.
+.TP
+.B ^H
+back over one character.
+.TP
+.B ^U
+back over all input on this line.
+.TP
+.B ^V
+escape the next character typed. (For example, 
+.B ^V^H
+will put a ^H into the file.)
+.TP
+.B ESC
+exit insert mode.
+.TP
+.B ^D
+If at start of line, reduce indentation 'shiftwidth' columns.
+.TP
+.B ^T
+If at start of line, increase indentation 'shiftwidth' columns.
+.RE
+
+.PP
+
+When in insert mode, Levee will not allow you to enter any control
+characters except return and tab.  Return ends input on this line and
+opens a new line for input.
+
+.TP
+.BI    map[!] [key [text]]
+Define/list macros.  There are 3 forms of map:
+.TP
+.I map.
+This lists all the active macros.
+.TP
+.IR map (key).
+This shows the macro associated with (key), if any.
+.TP
+.IR map "(key) (text)"
+This maps (key) to (text). You may map any
+key except ":" and escape. In the normal
+form (map), the macro will be effective
+in visual mode, but in the alternate form,
+(map!), the macro will be effective in
+insert and command modes.
+
+.PP
+For example, if you map!ped return to "hello world", every time
+you entered a return in command or visual mode, the string "hello
+world" would pop up.
+
+.TP
+.BI    next [file ...]
+Edit the next file in the arglist, or edit a new arglist. Levee
+takes its initial arglist off the command line when you execute it.
+If "autowrite" is set, Levee will write out the changes to the
+current file before editing the next one.
+
+.TP
+.IB    (.) open
+Insert below the current line. Otherwise just like insert.
+
+.TP
+.B    previous
+Edit the previous file in the arglist. Otherwise, like next.
+
+.TP
+.IB    (.,.) print
+Display lines without changing the current line.
+
+.TP
+.IB    (.) put
+Put the contents of the yank buffer back on the line below
+the current line. If you specify a line, it resets the current
+line, then puts the yank buffer back. The yank buffer is filled
+by the delete, change, or yank commands. Put does not destroy
+the yank buffer, so you may put back text multiple times.
+
+.TP
+.B    quit[!]
+Exit Levee. If you want to discard changes, use "quit!"
+
+.TP
+.IB    (.) read [file]
+put the contents of 'file' after the current line.
+
+.TP
+.BI    rm file
+Delete 'file' from disk.
+
+.TP
+.BI    set [option=value]
+Set a tunable variable. Levee has a dozen or so user-definable
+variables which you can twiddle via this command. There are boolean,
+integer, and string variables that you can set. A string or integer
+variable is set by 'set xxx=yyy', a boolean variable is set via
+'set xxx' or 'set noxxx'.
+
+Here are the settable variables (and abbreviations):
+.TP
+.BI tabsize (ts)
+tab stop.
+.TP
+.BI shiftwidth (sw)
+columns to shift on ^D, ^T, >>, or <<
+.TP
+.B scroll
+number of lines to scroll on ^D, ^U
+.TP
+.BI autoindent (ai)
+supply indentation during insert mode.
+.TP
+.BI autowrite (aw)
+write out changes before :next, :prev
+.TP
+.BI autocopy (ac)
+make backup copies before writing changes.
+.TP
+.B list
+display tabs as ^I, end of line as $.
+.TP
+.B magic
+use regular expressions in searches.
+.TP
+.B suffix
+if the filename does not have a . in
+it, supply the suffix. (this is the
+only string variable.)
+.TP
+.BI overwrite (ow)
+destroy old file first, then write.
+.TP
+.BI beautify (be)
+When set, Levee will not allow insert
+of any control character except tab
+and return unless you escape it with
+ctrl-V.
+.TP
+.B wrapscan
+searches wrap around end of buffer.
+.TP
+.BI ignorecase (ic)
+Ignore the case of alphabetic characters
+during searches.
+.TP
+.B "mapslash"
+(ST version only) Map '/' in filenames to
+'\\'.  If the environment contains `mapslash'
+when levee is called, this variable will
+default to true, otherwise it defaults to
+false. (See the documentation for the
+Teeny-shell on how the teeny-shell interprets
+`mapslash')
+.TP
+.BI lines (li)
+(ST version only) How many lines on the display.
+This is primarily for running levee through
+the serial port - put set li=xx into your
+LVRC for a xx line terminal.
+.TP
+.BI cols (co)
+(ST version only) How many columns on the
+display.  Like the lines variable, it's for
+running levee through the serial port.
+
+.PP
+You may set multiple variables on one line, as in 'set ws noai'.
+To see the current settings of these variables, :set -- without any
+arguments -- will show the current settings.
+
+At startup, Levee looks in the environment variable LVRC for
+a list of variables to set (GEMDOS/MS-DOS). LVRC is one line
+of the form 'option=value ...'. If you have a LVRC defined that
+is 'ts=4 ow nows', Levee will set tabsize to 4, turn on overwrite,
+and turn off wrapscan.
+
+If you are using RMX, Levee looks in the file ":home:r?lvrc"
+for initialization. If you are using Osy/SWOs, Levee looks in the
+file "*.lvrc". The format of these files are different from the
+LVRC variable -- see "source" for more information.
+
+.TP
+.BI source file
+Take command mode commands from 'file'. These commands can be
+any legal command, except "visual". If a error happens during
+execution of 'file', Levee abandons that level of source'ing.
+
+In Osy/SWOs, there are a few differences in insert mode from
+within a sourced file. No character has special meaning except a
+line  containing nothing but a period, which terminates insert mode.
+For example:
+
+.RS
+:commands
+.br
+.
+.br
+.
+.br
+:insert
+.br
+blah blah blah blah blah blah
+.br
+blah blah blah blah blah blah
+.br
+blah blah blah blah blah blah
+.br
+.
+.br
+:more commands
+.RE
+
+If you are running Levee under any other operating system,
+you cannot do a insert from a :source file.
+
+.TP
+.B (.,.)substitute(delim)patt(delim)repl(delim)[qcpg]
+.TP
+.B (.,.)substitute&
+
+Search for patt and replace it with repl. Levee will look for
+patt once on each line and replace it with repl. The delimiter
+may be any ascii character.
+
+The pattern is a regular expression, just like a search pattern.
+
+You may include parts of the pattern in the replacement string;
+A '&' in the replacement pattern copies in the whole source pattern,
+so if you do a 'sub/this/& and that/g', every instance of 'this'
+will be replaced with 'this and that'.  Also, you may pull parts of
+the pattern out by using the \\( and \\) argument meta-characters.
+Arguments gotten by \\( & \\) are put into the replacement string
+everywhere you do a \\1..\\9 [ \\1 is the first argument you set up
+with \\( & \\) ]. So, if you want to reverse the order of two substrings,
+you can do 'sub/\\(string1\\)\\(string2\\)/\\2\\1/'.
+
+substitute& redoes the last substitution.
+
+Options:
+.TP
+.B q,c
+before doing the substitute, display the affected
+line and wait for you to type a character. If you
+type 'y', it will do the substitution. 'q' aborts
+the substitute,  'a'  does the rest of the change
+without prompting, and 'n' does not do it.
+.TP
+.B p
+print the affected lines after the change.
+.TP
+.B g
+do the change globally. That is, do it for every
+occurence  of patt on a  line,  rather than just
+once.
+.PP
+
+.TP
+.B undo
+Undo the last modification to the file (except :edit, :next, :rm,
+or :write.) You can only undo the last change to a file -- undo counts
+as a change. :undo followed by :undo does nothing to the file.
+
+.TP
+.BI unmap (key)
+Undefine a macro (see map).
+
+.TP
+.BI visual [list]
+If you entered command mode by "Q" or "execmode", return to
+visual mode.  If you provide an argument list, it also does a
+`:next' on that list.
+
+.TP
+.B version
+Show which version of levee this is.
+
+.TP
+.IB (.,.) "write \fI[file]"
+Write lines to a file. If you write the everything to 'file',
+the filename is set to 'file', and if you do not specify a file,
+Levee will write to the filename.
+
+.TP
+.IB (.,.) "wq \fI[file]"
+ Write to a file, then quit.
+
+.TP
+.IB (.,.) yank
+Yank lines from the file into the yank buffer, for later
+putback with "put".
+
+.TP
+.B xit[!]
+Write changes to the current file, then exit. If there are
+more files in the arglist, use "xit!"
+
+.TP
+.B ![command]
+Execute command.
+
+Example:
+
+.RS
+!ls    => does a 'ls'.
+.RE
+
+This command is available only under GEMDOS, MSDOS, RMX, and
+Unix.
+
+.TP
+.B ($)=
+Give the line number of the addressed line. /end/= gives you
+the line number of the next line with a 'end' on it.
+
+
+.SH "VISUAL MODE COMMANDS"
+Visual mode commands move you around  and modify the file.
+There are movement commands to move the cursor by a variety of
+objects.
+
+In the description,  a (#) means a optional  count.  If a
+command has a optional count,  it will tell you what the count
+does in parenthesis.  A (*) means that the command can be used
+in the delete, yank, and change commands.
+
+Counts are made up by  entering digits.  If you type '45',
+the count will be set to 45. To cancel a count, type ESC.
+
+This section discusses 'whitespace' occasionally.
+Whitespace is tabs, spaces, and end of line.
+
+.SS "How the display works"
+
+Characters  are  displayed  on  the  screen  as  you would
+expect,  except that  nonprinting characters are  shown as ^x,
+and tabs  expand to  spaces ( unless you  set the option list,
+then they show as ^I.)  When sitting on a control character or
+tab, the cursor is placed on the FIRST character displayed. If
+you move the cursor to  any other part of them ( via j or k --
+see below), any changes will start at the next character.
+ 
+Levee  does  not  display a end of  file marker, but lines
+past the end of the file are denoted by ~ lines.
+
+If list is  set,  tabs  display as ^I, and the end of line
+displays as $.
+
+If a  line is too long for the screen,  it will  just disappear off the end of the screen.
+
+Levee will handle any screen resolution and any monospaced
+font you hand it ( if you are running in low resolution, Levee
+will give you a 25x40 window, for example.)
+
+.SS "Visual mode commands"
+.TP
+.B ^A
+Show a debugging message at the bottom of the screen. This is not at
+all useful unless you are debugging the editor. Ignore it.
+
+.TP
+.B (#)^D
+Scroll the screen down a half screen. If a count is specified, scroll
+down the specified number of lines.
+
+.TP
+.B ^E
+Scroll down 1 line (shorthand for 1^D )
+
+.TP
+.B ^G
+Show file statistics. Exactly like ':file'.
+
+.TP
+.IB (*) (#)^H
+Move the cursor left one (count) chars.
+
+.TP
+.B ^I
+Redraw the screen.
+
+.TP
+.IB (*) (#)^J
+Move down one (count) lines. When you use ^J and ^K (below) to move
+up or down lines, the cursor will remain in the same column, even if
+it is in the middle of a tabstop or past the end of a line.
+
+.TP
+.IB (*)  (#)^K
+Move up one (count) lines.
+.TP
+.IB (*)  (#)^L
+Move right one (count) characters.
+.TP
+.IB (*)  (#)^M
+Move to the first nonwhite space on the next line. If a count is specified,
+move to the first nonwhite count lines down.
+.TP
+.B (#)^U
+Scroll the screen up a half page. If a count is specified, scroll up
+count lines.
+
+.TP
+.B ^Y
+Scroll the screen up 1 line (shorthand for 1^U.)
+
+.TP
+.B (#)a
+Insert text AFTER the cursor. If you give a count, the insertion will
+be repeated count times ( 40i-ESC will give you a line of 40 dashes).
+
+The commands in insert mode are the same for visual and command mode.
+
+.TP
+.IB (*) (#)b
+Move to the beginning of the last word (the count'th word back).
+A word is a collection of alphanumeric characters (a-z0-9$_#) or
+any other nonwhite character (i.e. anything but space, tab, eoln).
+
+.TP
+.B c
+Change a object. Change deletes an object, then enters insert mode without
+redrawing the screen. When you tell it the object to be changed, Levee
+puts a '$' on the last character of the object. You cannot change
+backwards.
+
+The object may be any visual mode command marked with a '(*) '. For
+example, 'c4l' will change the next 4 characters on the line to something
+else. (4cl does the same thing -- 4c4l changes the next 16 characters on
+this line.)
+
+ 'cc' will change whole lines.
+
+When changing, deleting, or yanking a object, it will be placed into
+a yank buffer, where it can be retrieved by the 'p' or 'P' commands.
+
+.TP
+.B (#)d
+Delete an object. Like 'cc', 'dd' affects whole lines.
+
+.TP
+.IB (*) (#)e
+Move to the end of the current word.
+
+.TP
+.IB (*) (#)f(x)
+Find the next (count'th) occurance of a character on the current line.
+For example, if the cursor is sitting on the first character of the
+line 'abcdef', typing "ff" will put the cursor on the 'f'.
+
+.TP
+.IB (*) (#)h
+Move left one (count) characters. Exactly like ^H.
+
+.TP
+.B (#)i
+Start inserting characters at the cursor. If you specify a count,
+the insertion will be duplicated count times.
+
+.TP
+.IB (*) (#)j
+Move down one (count) lines. Exactly like ^J.
+
+.TP
+.IB (*) (#)k
+Move up one (count) lines. Exactly like ^K.
+
+.TP
+,B (*) (#)l
+Move right one (count) character. Exactly like ^L.
+
+.TP
+.B m(x)
+Set the marker (x). There are 26 markers available (a-z). You may
+move to a marker by use of the ' or ` commands.
+
+.TP
+.IB (*) n
+Find the next occurance of a search pattern. When you do a search with
+a / or ? command, Levee will remember the pattern and the direction you
+searched in. 'n' will search in the same direction for the pattern, 'N'
+searches in the opposite direction.
+
+.TP
+.B o
+Open a line below the current line for insertion.
+
+.TP
+.B p
+Put yanked/deleted text back after the cursor. Text is yanked
+by the delete (d,x,X,D), change (c,C,s,S), and yank (y,Y) commands.
+
+.TP
+.B (#)r(x)
+Replace characters (up to end of line) with (x). '4ra' will change the
+next 4 characters after the cursor into 'aaaa'.
+
+.TP
+.B (#)s
+change one (count) characters. Shorthand for (#)cl.
+
+.TP
+.IB (*) (#)t(x)
+Move up to a character on the current line. If you are on the first
+character of the line 'abcdef' and you type 'tf', you will end up sitting
+on the 'e'.
+
+.TP
+.B u
+Undo last modification. You can undo ANY modification command except
+:edit, :next, :rm, or :write. (Just like :undo).
+
+.TP
+.IB (*) (#)v
+Move back to the very end of the previous (count'th) word.
+See 'b' for the definition of a word.
+
+.TP
+.IB (*) (#)w
+Move up to the very beginning of the next (count'th) word.
+
+.TP
+.B (#)x
+Delete one (count) characters forward. Shorthand for (#)dl.
+
+.TP
+.B y
+Yank an object for later use by put. 'yy' yanks whole lines.
+
+.TP
+.B A
+Append text at the end of the line. Shorthand for $a.
+
+.TP
+.IB (*) (#)B
+Move to the beginning of the current word. Exactly like 'b'.
+
+.B NOTE:
+this is incorrect. the capitalized word movement commands should,
+and will in the future, be used for movement by space-delimited words.
+
+.TP
+.B C
+Change to the end of the line. Shorthand for c$.
+
+.TP
+.B D
+Delete to the end of the line. Shorthand for d$.
+
+.TP
+.IB (*) (#)F(x)
+Move to the first (count'th) previous occurance of a character on the
+current line. If you are sitting at the end of the line 'abcdef', typing
+"Fa" will move you back to the 'a' at the start of the line.
+
+.TP
+.IB (*) (#)G
+Goto line. If you specify a count, Levee will move to that line, and if
+there is no count, Levee moves to the absolute end of the file.
+
+To get to the start of the file, type "1G". To the end, just "G".
+
+.TP
+.IB (*) H
+Move to the first nonwhite character at the top of the screen.
+
+.TP
+.B I
+Insert at the end of the current line. Shorthand for $i.
+
+.TP
+.B  (#)J
+Join two (count+1) lines together. Joining appends the second line at
+the end of the first, putting a space between them. If the first line
+ends in whitespace, Levee will not put in a space.
+
+.TP
+.IB (*) L
+Move to the last nonwhite character on the last line of the screen.
+
+.TP
+.IB (*)  M
+Move to the first nonwhite character in the middle of the screen.
+
+.TP
+.B O
+Open a line above the current line. Otherwise works just like 'o'.
+
+.TP
+.B P
+Put back the yank buffer at the cursor. Otherwise works just like 'p'.
+
+.TP
+.B Q
+Enter and remain in command mode. Just like the command :exec. To get
+back to visual mode, you must enter the command ':visual'.
+
+.TP
+.B  R
+Replace mode. A limited subset of insert mode that overwrites characters
+up to end of line. All of the normal insert mode commands apply.
+If you overwrite a character, then back over it with ^H,^U, or ^W, it
+will reappear after you exit Replace mode.
+
+Escape exits replace mode.
+
+.B NOTE:
+due to a bug, entering a <return> in Replace mode will drop you
+back into visual mode with an error. The replacements you have made
+will remain.
+
+.TP
+.B S
+Change characters backwards. Shorthand for (#)ch.
+
+.TP
+.IB (*) (#)T(x)
+Move back to character on current line. If you are on the last character
+of the line 'abcdef', typing "Ta" will move you back to the 'b'.
+
+.TP
+.IB (*) (#)W
+Move to end of word. Exactly like 'e'.
+
+.TP
+.B (#)X
+Delete characters backwards. Shorthand for (#)dh.
+
+.TP
+.B Y
+Yank to end of line. Shorthand for y$.
+
+.TP
+.B ZZ
+Write changes to current file and exit if last file in arglist.
+Exactly like :xit.
+
+.TP
+.IB (*) (#)$
+Move to end of line. If you give a count, move to the end of the (count-1)
+line down (so 2$ moves you to the end of the next line.).
+
+.TP
+.B 0
+Move to the beginning of the current line.  Shorthand for 0|.
+
+.TP
+.B (#)!
+Pipe an object through an external program. Like 'cc', '!!' affects whole lines.
+
+.TP
+.IB (*) %
+Find matching bracket, parenthesis, or squiggly bracket. If you are not
+sitting on a '[]{}()', Levee will search forward for one of them on the
+current line, then match whatever it finds.
+
+.TP
+.B [space]
+Move to the first nonwhite character on the current line.
+
+.TP
+.B &
+Redo last substitution command.
+
+.TP
+.IB (*) (#){
+Move to the beginning of the count'th paragraph back. A paragraph is
+delimited by a blank line.
+
+.TP
+.IB (*) (#)}
+Move to the end of the count'th paragraph forward.
+
+.TP
+.IB (*) (#)(
+Move to the beginning of the count'th sentence back. A sentence is
+delimited by a ., a !, or a ? followed by a space, a tab, or end of line.
+
+.TP
+.IB (*) (#))
+Move to the end of the count'th sentence forward.
+
+.TP
+.IB (*) (#)-
+Move to the (count'th) previous line, first nonwhite.
+
+.TP
+.IB (*) (#)+
+Move to the (count'th) next line, first nonwhite.
+
+.TP
+.B  (#)~
+Change the case of the next count characters. Upper case becomes lowercase,
+lowercase becomes uppercase.
+
+.TP
+.IB (*) `(x)
+Move to the exact position of mark (x). There is a special mark for some
+of the visual mode move ment commands -- '' will move you to where you
+were before the last (,),',`,G,/,?,n,N command.
+
+.TP
+.B :
+Execute one command mode command. When the command is done, it will return
+to visual mode if it produces one line of output, but if it scrolls the
+screen, Levee will prompt [more] before returning to visual mode. If you
+type a : in response to the [more] prompt, Levee will remain in command
+mode for one more command.
+
+.TP
+.B  (#)<(#)
+Shift one (count) objects left. If you specify a second count, Levee will
+shift the object left that many columns -- if you do not, they will be sh
+shifted shiftwidth columns.
+
+This is a nondestructive shift. If the shift would carry past the left
+margin, the objects will be moved up to the left margin but no farther.
+
+Like the other object movement commands, '<<' will affect whole lines.
+
+.TP
+.B (#)>(#)
+Shift one (count) objects right. Just like <, except it will not shift
+objects past the right margin of the screen. If you do shift an object
+past the right margin of the screen, all of its indent will be removed
+and it will end up by the left margin.
+
+.TP
+.B \.
+Repeat last modification command. (except undo)
+
+.TP
+.IB (*) ?
+Search for pattern backwards. Escape aborts the search pattern, and a
+empty pattern means search for the last pattern again.
+
+.TP
+.IB (*) /
+Search for pattern forwards. Otherwise like ?.
+
+.TP
+.B (#)|
+Move to specified column. If you don't have a count, move to column 0.
+
+.SH "REGULAR EXPRESSIONS"
+
+Levee gives  special meanings to  some characters during
+a pattern match.  The character "." will match any one char,
+the character "*" will match zero or  more occurances of the
+previous char ( so, a* will match 'a','aa','aaa', etc, or it
+will match nothing at all). If a pattern begins with "^", it
+will  only match  at the  beginning of a line,  and patterns
+ending with a "$" will only match at the end of a line.
+
+Brackets ('[]') have special meaning as well.  They mean
+match any one of the characters inside the brackets. '[abc]'
+will  match  'a', 'b', or 'c'.  You may  specify  a range of
+characters inside brackets by using a dash (-). '[a-z]' will
+match any lowercase alphabetic character.  If ^ is the first
+character  in  the  bracket,  it means match  any  character
+except those in the brackets.   '[^abc]' will match anything
+except 'a','b', or 'c'.
+
+Backslash takes away  special  meaning  for these chars,
+but '\\t' specifies  a  tab,  and \\( & \\)  delimit  arguments
+inside a pattern (used only by :substitute.)    The patterns
+\\< and \\> have special  meaning,  too;  they match the start
+and end of alpha-numeric tokens.
+
+If you  turn off  the editor variable  'magic',  none of
+the above  characters will  have special  meaning  inside of
+a pattern (see 'set').
+
+Some example patterns:
+
+.TP
+.B ^end$
+Find a line that is just 'end'.
+.TP
+.B [Ee][Nn][Dd]
+Find a 'end', ignoring case.
+.TP
+.B [A-Za-z][A-Za-z0-9]*
+Find the next identifier.
+.TP
+.B (\\*.*\\*)
+Find the next one-line pascal comment.
+.TP
+.B \<the\>
+Find the next occurance of `the'.
+
+
+.SH LIMITATIONS
+Levee can only edit files up to 256000 characters long. ^M is used
+as its internal line separator, so inserting ^M will have interesting
+consequences.
+
+.SH BUGS
+Probably infinite.
+
+.SH AUTHOR
+.B "David L. Parsons"
+.I (orc@pell.chi.il.us)
+.br
+Testing, suggestions, and impractical design goals by:
+Jim Bolland. John Tainter. John Plocher.
+
+.SH COPYRIGHT
+Copyright (c) 1982-2007 David L Parsons
+.br
+All rights reserved.
+.br
+
+Redistribution and use in source and binary forms, without or
+without modification, are permitted provided that the above
+copyright notice and this paragraph are duplicated in all such
+forms and that any documentation, advertising materials, and
+other materials related to such distribution and use acknowledge
+that the software was developed by David L Parsons (orc@pell.chi.il.us).
+My name may not be used to endorse or promote products derived
+from this software without specific prior written permission.
+THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.