From e8cb02f3f7feac84faaaca8a185e457509195cef Mon Sep 17 00:00:00 2001 From: Serge Vakulenko Date: Sat, 18 Jul 2015 18:41:46 -0700 Subject: [PATCH] Added a tiny implementation of readline library, based on linenoise sources. See https://github.com/antirez/linenoise for details. Implemented a routine atexit() in libc. Pdc modified to use readline library. --- include/.gitignore | 1 + lib/Makefile | 2 +- lib/libreadline/Makefile | 17 + rootfs.manifest | 4 + src/cmd/pdc/.gitignore | 3 + src/cmd/pdc/Makefile | 3 +- src/libc/stdio/exit.c | 40 +- src/libreadline/LICENSE | 25 + src/libreadline/Makefile | 19 + src/libreadline/Makefile-unix | 11 + src/libreadline/README | 87 +++ src/libreadline/example.c | 53 ++ src/libreadline/history.h | 75 +++ src/libreadline/readline.c | 1098 +++++++++++++++++++++++++++++++++ src/libreadline/readline.h | 74 +++ 15 files changed, 1507 insertions(+), 5 deletions(-) create mode 100644 include/.gitignore create mode 100644 lib/libreadline/Makefile create mode 100644 src/cmd/pdc/.gitignore create mode 100644 src/libreadline/LICENSE create mode 100644 src/libreadline/Makefile create mode 100644 src/libreadline/Makefile-unix create mode 100644 src/libreadline/README create mode 100644 src/libreadline/example.c create mode 100644 src/libreadline/history.h create mode 100644 src/libreadline/readline.c create mode 100644 src/libreadline/readline.h diff --git a/include/.gitignore b/include/.gitignore new file mode 100644 index 0000000..0b5a58e --- /dev/null +++ b/include/.gitignore @@ -0,0 +1 @@ +readline diff --git a/lib/Makefile b/lib/Makefile index 1da3f99..593e0bc 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -1,5 +1,5 @@ TOPSRC = $(shell cd ..; pwd) -SUBDIR = startup libc libcurses libtermlib libwiznet +SUBDIR = startup libc libcurses libtermlib libwiznet libreadline PROG = ar as aout ld nm ranlib size strip CFLAGS += -std=gnu89 -fno-builtin -g -Werror -Wall -DCROSS -I. \ diff --git a/lib/libreadline/Makefile b/lib/libreadline/Makefile new file mode 100644 index 0000000..5acadf2 --- /dev/null +++ b/lib/libreadline/Makefile @@ -0,0 +1,17 @@ +TOPSRC = $(shell cd ../..; pwd) +include $(TOPSRC)/target.mk + +vpath %.c $(TOPSRC)/src/libreadline + +CFLAGS += -B$(TOPSRC)/lib/ $(DEFS) -Wa,-x -Wall -Werror + +OBJS = readline.o + +all: ../libreadline.a + +../libreadline.a: ../ar ../ranlib $(OBJS) + ../ar rc $@ $(OBJS) + ../ranlib $@ + +clean: + rm -f *~ *.o a.out *.a diff --git a/rootfs.manifest b/rootfs.manifest index 093d855..91f1f42 100644 --- a/rootfs.manifest +++ b/rootfs.manifest @@ -754,6 +754,7 @@ filemode 0664 dir /include dir /include/arpa dir /include/machine +dir /include/readline dir /include/smallc dir /include/smallc/sys dir /include/sys @@ -794,6 +795,8 @@ file /include/paths.h file /include/psout.h file /include/pwd.h file /include/ranlib.h +file /include/readline/history.h +file /include/readline/readline.h file /include/regexp.h file /include/setjmp.h file /include/sgtty.h @@ -906,6 +909,7 @@ target sys/syslog.h file /lib/crt0.o file /lib/libc.a file /lib/libcurses.a +file /lib/libreadline.a file /lib/libtermlib.a file /lib/libwiznet.a file /lib/retroImage diff --git a/src/cmd/pdc/.gitignore b/src/cmd/pdc/.gitignore new file mode 100644 index 0000000..97c4d42 --- /dev/null +++ b/src/cmd/pdc/.gitignore @@ -0,0 +1,3 @@ +pdc +y.tab.c +y.tab.h diff --git a/src/cmd/pdc/Makefile b/src/cmd/pdc/Makefile index 7f5c31b..349c2af 100644 --- a/src/cmd/pdc/Makefile +++ b/src/cmd/pdc/Makefile @@ -8,7 +8,8 @@ OBJS = pdc.o LDFLAGS += -g CFLAGS += -Werror -Wall -Os -CFLAGS += -DGCC_COMPAT -DHAVE_CPP_VARARG_MACRO_GCC +CFLAGS += -DGCC_COMPAT -DHAVE_CPP_VARARG_MACRO_GCC -DHAVE_READLINE +LIBS = -lreadline -lc all: pdc diff --git a/src/libc/stdio/exit.c b/src/libc/stdio/exit.c index eab715f..bcd03e9 100644 --- a/src/libc/stdio/exit.c +++ b/src/libc/stdio/exit.c @@ -1,14 +1,48 @@ #include #include +struct atexit { /* entry allocated per atexit() call */ + struct atexit *next; /* next enty in a list */ + void (*func)(void); /* callback function */ +}; + int errno; +struct atexit *__atexit; /* points to head of LIFO stack */ extern void _cleanup(); void exit (code) - int code; + int code; { - _cleanup(); - _exit (code); + register struct atexit *p; + + for (p = __atexit; p; p = p->next) + (*p->func)(); + _cleanup(); + _exit (code); +} + +/* + * Register a function to be performed at exit. + */ +int +atexit(fn) + void (*fn)(); +{ + static struct atexit __atexit0; /* one guaranteed table */ + register struct atexit *p; + + p = __atexit; + if (! p) { + p = &__atexit0; + } else { + p = malloc(sizeof(struct atexit)); + if (! p) + return -1; + p->next = __atexit; + } + p->func = fn; + __atexit = p; + return 0; } diff --git a/src/libreadline/LICENSE b/src/libreadline/LICENSE new file mode 100644 index 0000000..18e8148 --- /dev/null +++ b/src/libreadline/LICENSE @@ -0,0 +1,25 @@ +Copyright (c) 2010-2014, Salvatore Sanfilippo +Copyright (c) 2010-2013, Pieter Noordhuis + +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + +* Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + +* 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. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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. diff --git a/src/libreadline/Makefile b/src/libreadline/Makefile new file mode 100644 index 0000000..1828bf1 --- /dev/null +++ b/src/libreadline/Makefile @@ -0,0 +1,19 @@ +TOPSRC = $(shell cd ../..; pwd) +include $(TOPSRC)/target.mk + +CFLAGS += -O -Wall -Werror + +OBJS = readline.o + +all: ../libreadline.a + +../libreadline.a: ${OBJS} + @$(AR) cru $@ ${OBJS} + $(RANLIB) $@ + +install: all readline.h history.h + install -d $(DESTDIR)/include/readline/ + cp -p readline.h history.h $(DESTDIR)/include/readline/ + +clean: + rm -f *~ *.o a.out ../libreadline*.a diff --git a/src/libreadline/Makefile-unix b/src/libreadline/Makefile-unix new file mode 100644 index 0000000..8feb9b5 --- /dev/null +++ b/src/libreadline/Makefile-unix @@ -0,0 +1,11 @@ +CFLAGS += -Wall -Werror -Os -g + +example: readline.o example.o + $(CC) $(LDFLAGS) -o $@ readline.o example.o + +clean: + rm -rf *.o example example.dSYM history.txt + +### +example.o: example.c readline.h history.h +readline.o: readline.c readline.h history.h diff --git a/src/libreadline/README b/src/libreadline/README new file mode 100644 index 0000000..173f82a --- /dev/null +++ b/src/libreadline/README @@ -0,0 +1,87 @@ +Linenoise +~~~~~~~~~ +A minimal, zero-config, BSD licensed, readline replacement used +in Redis, MongoDB, and Android. + + * Single and multi line editing mode with the usual key bindings implemented. + * History handling. + * Completion. + * About 1,100 lines of BSD license source code. + * Only uses a subset of VT100 escapes (ANSI.SYS compatible). + + +Can a line editing library be 20k lines of code? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Line editing with some support for history is a really +important feature for command line utilities. Instead of +retyping almost the same stuff again and again it's just much +better to hit the up arrow and edit on syntax errors, or in +order to try a slightly different command. But apparently code +dealing with terminals is some sort of Black Magic: readline is +30k lines of code, libedit 20k. Is it reasonable to link small +utilities to huge libraries just to get a minimal support for +line editing? + +So what usually happens is either: + + * Large programs with configure scripts disabling line editing + if readline is not present in the system, or not supporting it + at all since readline is GPL licensed and libedit (the BSD + clone) is not as known and available as readline is (Real world + example of this problem: Tclsh). + + * Smaller programs not using a configure script not + supporting line editing at all (A problem we had with Redis-cli + for instance). + +The result is a pollution of binaries without line editing support. + +So I spent more or less two hours doing a reality check +resulting in this little library: is it *really* needed for a +line editing library to be 20k lines of code? Apparently not, +it is possibe to get a very small, zero configuration, trivial +to embed library, that solves the problem. Smaller programs +will just include this, supporing line editing out of the box. +Larger programs may use this little library or just checking +with configure if readline/libedit is available and resorting +to linenoise if not. + + +Terminals, in 2010 +~~~~~~~~~~~~~~~~~~ +Apparently almost every terminal you can happen to use today +has some kind of support for basic VT100 escape sequences. So I +tried to write a lib using just very basic VT100 features. The +resulting library appears to work everywhere I tried to use it, +and now can work even on ANSI.SYS compatible terminals, since +no VT220 specific sequences are used anymore. + +The library is currently about 1100 lines of code. In order to +use it in your project just look at the *example.c* file in the +source distribution, it is trivial. Linenoise is BSD code, so +you can use both in free software and commercial software. + + +Tested with... +~~~~~~~~~~~~~~ + * Linux text only console ($TERM = linux) + * Linux KDE terminal application ($TERM = xterm) + * Linux xterm ($TERM = xterm) + * Linux Buildroot ($TERM = vt100) + * Mac OS X iTerm ($TERM = xterm) + * Mac OS X default Terminal.app ($TERM = xterm) + * OpenBSD 4.5 through an OSX Terminal.app ($TERM = screen) + * IBM AIX 6.1 + * FreeBSD xterm ($TERM = xterm) + * ANSI.SYS + * Emacs comint mode ($TERM = dumb) + +Please test it everywhere you can and report back! + + +Let's push this forward! +~~~~~~~~~~~~~~~~~~~~~~~~ +Patches should be provided in the respect of linenoise +sensibility for small easy to understand code. + +Send feedbacks to antirez at gmail diff --git a/src/libreadline/example.c b/src/libreadline/example.c new file mode 100644 index 0000000..e3ea82d --- /dev/null +++ b/src/libreadline/example.c @@ -0,0 +1,53 @@ +#include +#include +#include +#include "readline.h" +#include "history.h" + +int main(int argc, char **argv) { + char *line; + char *prgname = argv[0]; + + /* Parse options, with --multiline we enable multi line editing. */ + while(argc > 1) { + argc--; + argv++; + if (!strcmp(*argv,"--multiline")) { + readline_set_multiline(1); + printf("Multi-line mode enabled.\n"); + } else if (!strcmp(*argv,"--keycodes")) { + readline_print_keycodes(); + exit(0); + } else { + fprintf(stderr, "Usage: %s [--multiline] [--keycodes]\n", prgname); + exit(1); + } + } + + /* Load history from file. The history file is just a plain text file + * where entries are separated by newlines. */ + add_history("history.txt"); /* Load the history at startup */ + + /* Now this is the main loop of the typical readline-based application. + * The call to readline() will block as long as the user types something + * and presses enter. + * + * The typed string is returned as a malloc() allocated string by + * readline, so the user needs to free() it. */ + while((line = readline("hello> ")) != NULL) { + /* Do something with the string. */ + if (line[0] != '\0' && line[0] != '/') { + printf("echo: '%s'\n", line); + add_history(line); /* Add to the history. */ + write_history("history.txt"); /* Save the history on disk. */ + } else if (!strncmp(line,"/historylen",11)) { + /* The "/historylen" command will change the history len. */ + int len = atoi(line+11); + history_set_length(len); + } else if (line[0] == '/') { + printf("Unrecognized command: %s\n", line); + } + free(line); + } + return 0; +} diff --git a/src/libreadline/history.h b/src/libreadline/history.h new file mode 100644 index 0000000..9e8267e --- /dev/null +++ b/src/libreadline/history.h @@ -0,0 +1,75 @@ +/* + * Guerrilla line editing library against the idea that a line editing lib + * needs to be 20,000 lines of C code. + * + * Based on linenoise.c with API modified for compatibility with + * traditional readline library. + * + * ------------------------------------------------------------------------ + * + * Copyright (c) 2010-2014, Salvatore Sanfilippo + * Copyright (c) 2010-2013, Pieter Noordhuis + * Copyright (c) 2015, Serge Vakulenko + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "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 COPYRIGHT + * HOLDER OR CONTRIBUTORS 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. + */ +#ifndef __HISTORY_H +#define __HISTORY_H + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Place STRING at the end of the history list. + * The associated data field (if any) is set to NULL. + */ +void add_history(const char *line); + +/* + * Set the maximum length of the current history array. + */ +int history_set_length(int len); + +/* + * Add the contents of FILENAME to the history list, a line at a time. + * If FILENAME is NULL, then read from ~/.history. Returns 0 if + * successful, or errno if not. + */ +int read_history(const char *filename); + +/* + * Write the current history to FILENAME. If FILENAME is NULL, + * then write the history list to ~/.history. Values returned + * are as in read_history (). + */ +int write_history(const char *filename); + +#ifdef __cplusplus +} +#endif + +#endif /* __HISTORY_H */ diff --git a/src/libreadline/readline.c b/src/libreadline/readline.c new file mode 100644 index 0000000..512575c --- /dev/null +++ b/src/libreadline/readline.c @@ -0,0 +1,1098 @@ +/* + * Guerrilla line editing library against the idea that a line editing lib + * needs to be 20,000 lines of C code. + * Based on linenoise.c with API modified for compatibility with + * traditional readline library. + * + * Does a number of crazy assumptions that happen to be true in 99.9999% of + * the 2010 UNIX computers around. + * + * You can find the original linenoise source code at: + * + * http://github.com/antirez/linenoise + * + * ------------------------------------------------------------------------ + * + * Copyright (c) 2010-2014, Salvatore Sanfilippo + * Copyright (c) 2010-2013, Pieter Noordhuis + * Copyright (c) 2015, Serge Vakulenko + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "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 COPYRIGHT + * HOLDER OR CONTRIBUTORS 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. + * + * ------------------------------------------------------------------------ + * + * References: + * - http://invisible-island.net/xterm/ctlseqs/ctlseqs.html + * - http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html + * + * Todo list: + * - Filter bogus Ctrl+ combinations. + * - Win32 support + * + * Bloat: + * - History search like Ctrl+r in readline? + * + * List of escape sequences used by this program, we do everything just + * with three sequences. In order to be so cheap we may have some + * flickering effect with some slow terminal, but the lesser sequences + * the more compatible. + * + * EL (Erase Line) + * Sequence: ESC [ n K + * Effect: if n is 0 or missing, clear from cursor to end of line + * Effect: if n is 1, clear from beginning of line to cursor + * Effect: if n is 2, clear entire line + * + * CUF (CUrsor Forward) + * Sequence: ESC [ n C + * Effect: moves cursor forward n chars + * + * CUB (CUrsor Backward) + * Sequence: ESC [ n D + * Effect: moves cursor backward n chars + * + * The following is used to get the terminal width if getting + * the width with the TIOCGWINSZ ioctl fails + * + * DSR (Device Status Report) + * Sequence: ESC [ 6 n + * Effect: reports the current cusor position as ESC [ n ; m R + * where n is the row and m is the column + * + * When multi line mode is enabled, we also use an additional escape + * sequence. However multi line editing is disabled by default. + * + * CUU (Cursor Up) + * Sequence: ESC [ n A + * Effect: moves cursor up of n chars. + * + * CUD (Cursor Down) + * Sequence: ESC [ n B + * Effect: moves cursor down of n chars. + * + * When readline_clear_screen() is called, two additional escape sequences + * are used in order to clear the screen and position the cursor at home + * position. + * + * CUP (Cursor position) + * Sequence: ESC [ H + * Effect: moves the cursor to upper left corner + * + * ED (Erase display) + * Sequence: ESC [ 2 J + * Effect: clear the whole screen + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "readline.h" +#include "history.h" +#ifdef USE_TERMIOS +# include +#else +# define termios sgttyb +#endif + +#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100 +#define LINENOISE_MAX_LINE 4096 +static char *unsupported_term[] = {"dumb", "cons25", "emacs", NULL}; + +static struct termios term_orig; /* In order to restore at exit. */ +static int rawmode = 0; /* For atexit() function to check if restore is needed */ +static int mlmode = 0; /* Multi line mode. Default is single line. */ +static int atexit_registered = 0; /* Register atexit just 1 time. */ +static int history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN; +static int history_len = 0; +static char **history = NULL; + +/* The linenoiseState structure represents the state during line editing. + * We pass this state to functions implementing specific editing + * functionalities. */ +struct linenoiseState { + int ifd; /* Terminal stdin file descriptor. */ + int ofd; /* Terminal stdout file descriptor. */ + char *buf; /* Edited line buffer. */ + size_t buflen; /* Edited line buffer size. */ + const char *prompt; /* Prompt to display. */ + size_t plen; /* Prompt length. */ + size_t pos; /* Current cursor position. */ + size_t oldpos; /* Previous refresh cursor position. */ + size_t len; /* Current edited line length. */ + size_t cols; /* Number of columns in terminal. */ + size_t maxrows; /* Maximum num of rows used so far (multiline mode) */ + int history_index; /* The history index we are currently editing. */ +}; + +enum KEY_ACTION{ + KEY_NULL = 0, /* NULL */ + CTRL_A = 1, /* Ctrl+a */ + CTRL_B = 2, /* Ctrl-b */ + CTRL_C = 3, /* Ctrl-c */ + CTRL_D = 4, /* Ctrl-d */ + CTRL_E = 5, /* Ctrl-e */ + CTRL_F = 6, /* Ctrl-f */ + CTRL_H = 8, /* Ctrl-h */ + TAB = 9, /* Tab */ + CTRL_K = 11, /* Ctrl+k */ + CTRL_L = 12, /* Ctrl+l */ + ENTER = 13, /* Enter */ + CTRL_N = 14, /* Ctrl-n */ + CTRL_P = 16, /* Ctrl-p */ + CTRL_T = 20, /* Ctrl-t */ + CTRL_U = 21, /* Ctrl+u */ + CTRL_W = 23, /* Ctrl+w */ + ESC = 27, /* Escape */ + BACKSPACE = 127, /* Backspace */ +}; + +static void linenoiseAtExit(void); +static void refreshLine(struct linenoiseState *l); + +/* Debugging macro. */ +#if 0 +FILE *lndebug_fp = NULL; +#define lndebug(...) \ + do { \ + if (lndebug_fp == NULL) { \ + lndebug_fp = fopen("/tmp/lndebug.txt","a"); \ + fprintf(lndebug_fp, \ + "[%d %d %d] p: %d, rows: %d, rpos: %d, max: %d, oldmax: %d\n", \ + (int)l->len,(int)l->pos,(int)l->oldpos,plen,rows,rpos, \ + (int)l->maxrows,old_rows); \ + } \ + fprintf(lndebug_fp, ", " __VA_ARGS__); \ + fflush(lndebug_fp); \ + } while (0) +#else +#define lndebug(fmt, ...) +#endif + +/* ======================= Low level terminal handling ====================== */ + +/* Set if to use or not the multi line mode. */ +void readline_set_multiline(int ml) +{ + mlmode = ml; +} + +/* Return true if the terminal name is in the list of terminals we know are + * not able to understand basic escape sequences. */ +static int isUnsupportedTerm(void) +{ + char *term = getenv("TERM"); + int j; + + if (term == NULL) + return 0; + for (j = 0; unsupported_term[j]; j++) + if (!strcasecmp(term, unsupported_term[j])) + return 1; + return 0; +} + +/* Raw mode: 1960 magic shit. */ +static int enableRawMode(int fd) +{ + struct termios raw; + + if (!isatty(STDIN_FILENO)) + goto fatal; + if (!atexit_registered) { + atexit(linenoiseAtExit); + atexit_registered = 1; + } + +#ifdef TCSAFLUSH + /* Modern POSIX style of tty control. */ + if (tcgetattr(fd, &term_orig) < 0) + goto fatal; + + raw = term_orig; /* modify the original mode */ + /* input modes: no break, no CR to NL, no parity check, no strip char, + * no start/stop output control. */ + raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON); + /* output modes - disable post processing */ + raw.c_oflag &= ~(OPOST); + /* control modes - set 8 bit chars */ + raw.c_cflag |= (CS8); + /* local modes - choing off, canonical off, no extended functions, + * no signal chars (^Z,^C) */ + raw.c_lflag &= ~(ECHO | ICANON | IEXTEN); // leave ISIG ON- allow intr's + /* control chars - set return condition: min number of bytes and timer. + * We want read to return every single byte, without timeout. */ + raw.c_cc[VMIN] = 1; + raw.c_cc[VTIME] = 0; /* 1 byte, no timer */ + + /* put terminal in raw mode after flushing */ + if (tcsetattr(fd, TCSAFLUSH, &raw) < 0) + goto fatal; +#else + /* Outdated SysV Unix style of tty control. */ + if (ioctl(fd, TIOCGETP, &term_orig) < 0) + goto fatal; + + raw = term_orig; /* modify the original mode */ + raw.sg_flags &= ~(ECHO | CRMOD | XTABS | RAW); + raw.sg_flags |= CBREAK; + + /* put terminal in raw mode */ + if (ioctl(fd, TIOCSETP, &raw) < 0) + goto fatal; +#endif + + rawmode = 1; + return 0; + +fatal: + errno = ENOTTY; + return -1; +} + +static void disableRawMode(int fd) +{ + /* Don't even check the return value as it's too late. */ + if (rawmode) { +#ifdef TCSAFLUSH + if (tcsetattr(fd, TCSAFLUSH, &term_orig) < 0) + return; +#else + if (ioctl(fd, TIOCSETP, &term_orig) < 0) + return; +#endif + + rawmode = 0; + } +} + +/* Use the ESC [6n escape sequence to query the horizontal cursor position + * and return it. On error -1 is returned, on success the position of the + * cursor. */ +static int getCursorPosition(int ifd, int ofd) +{ + char buf[32]; + int cols, rows; + unsigned int i = 0; + + /* Report cursor location */ + if (write(ofd, "\x1b[6n", 4) != 4) + return -1; + + /* Read the response: ESC [ rows ; cols R */ + while (i < sizeof(buf)-1) { + if (read(ifd,buf+i,1) != 1) + break; + if (buf[i] == 'R') + break; + i++; + } + buf[i] = '\0'; + + /* Parse it. */ + if (buf[0] != ESC || buf[1] != '[') + return -1; + if (sscanf(buf+2,"%d;%d",&rows,&cols) != 2) + return -1; + return cols; +} + +/* Try to get the number of columns in the current terminal, or assume 80 + * if it fails. */ +static int getColumns(int ifd, int ofd) +{ + struct winsize ws; + + if (ioctl(1, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) { + /* ioctl() failed. Try to query the terminal itself. */ + int start, cols; + + /* Get the initial position so we can restore it later. */ + start = getCursorPosition(ifd,ofd); + if (start == -1) + goto failed; + + /* Go to right margin and get position. */ + if (write(ofd,"\x1b[999C",6) != 6) + goto failed; + cols = getCursorPosition(ifd,ofd); + if (cols == -1) + goto failed; + + /* Restore position. */ + if (cols > start) { + char seq[32]; + snprintf(seq,32,"\x1b[%dD",cols-start); + if (write(ofd,seq,strlen(seq)) == -1) { + /* Can't recover... */ + } + } + return cols; + } else { + return ws.ws_col; + } + +failed: + return 80; +} + +/* Clear the screen. Used to handle ctrl+l */ +void readline_clear_screen(void) +{ + if (write(STDOUT_FILENO,"\x1b[H\x1b[2J",7) <= 0) { + /* nothing to do, just to avoid warning. */ + } +} + +/* =========================== Line editing ================================= */ + +/* We define a very simple "append buffer" structure, that is an heap + * allocated string where we can append to. This is useful in order to + * write all the escape sequences in a buffer and flush them to the standard + * output in a single call, to avoid flickering effects. */ +struct abuf { + char *b; + int len; +}; + +static void abInit(struct abuf *ab) +{ + ab->b = NULL; + ab->len = 0; +} + +static void abAppend(struct abuf *ab, const char *s, int len) +{ + char *new = realloc(ab->b,ab->len+len); + + if (new == NULL) + return; + memcpy(new+ab->len,s,len); + ab->b = new; + ab->len += len; +} + +static void abFree(struct abuf *ab) +{ + free(ab->b); +} + +/* Single line low level line refresh. + * + * Rewrite the currently edited line accordingly to the buffer content, + * cursor position, and number of columns of the terminal. */ +static void refreshSingleLine(struct linenoiseState *l) +{ + char seq[64]; + size_t plen = strlen(l->prompt); + int fd = l->ofd; + char *buf = l->buf; + size_t len = l->len; + size_t pos = l->pos; + struct abuf ab; + + while((plen+pos) >= l->cols) { + buf++; + len--; + pos--; + } + while (plen+len > l->cols) { + len--; + } + + abInit(&ab); + /* Cursor to left edge */ + snprintf(seq,64,"\r"); + abAppend(&ab,seq,strlen(seq)); + /* Write the prompt and the current buffer content */ + abAppend(&ab,l->prompt,strlen(l->prompt)); + abAppend(&ab,buf,len); + /* Erase to right */ + snprintf(seq,64,"\x1b[0K"); + abAppend(&ab,seq,strlen(seq)); + /* Move cursor to original position. */ + snprintf(seq,64,"\r\x1b[%dC", (int)(pos+plen)); + abAppend(&ab,seq,strlen(seq)); + if (write(fd,ab.b,ab.len) == -1) { + /* Can't recover from write error. */ + } + abFree(&ab); +} + +/* Multi line low level line refresh. + * + * Rewrite the currently edited line accordingly to the buffer content, + * cursor position, and number of columns of the terminal. */ +static void refreshMultiLine(struct linenoiseState *l) +{ + char seq[64]; + int plen = strlen(l->prompt); + int rows = (plen+l->len+l->cols-1)/l->cols; /* rows used by current buf. */ + int rpos = (plen+l->oldpos+l->cols)/l->cols; /* cursor relative row. */ + int rpos2; /* rpos after refresh. */ + int col; /* colum position, zero-based. */ + int old_rows = l->maxrows; + int fd = l->ofd, j; + struct abuf ab; + + /* Update maxrows if needed. */ + if (rows > (int)l->maxrows) + l->maxrows = rows; + + /* First step: clear all the lines used before. To do so start by + * going to the last row. */ + abInit(&ab); + if (old_rows-rpos > 0) { + lndebug("go down %d", old_rows-rpos); + snprintf(seq,64,"\x1b[%dB", old_rows-rpos); + abAppend(&ab,seq,strlen(seq)); + } + + /* Now for every row clear it, go up. */ + for (j = 0; j < old_rows-1; j++) { + lndebug("clear+up"); + snprintf(seq,64,"\r\x1b[0K\x1b[1A"); + abAppend(&ab,seq,strlen(seq)); + } + + /* Clean the top line. */ + lndebug("clear"); + snprintf(seq,64,"\r\x1b[0K"); + abAppend(&ab,seq,strlen(seq)); + + /* Write the prompt and the current buffer content */ + abAppend(&ab,l->prompt,strlen(l->prompt)); + abAppend(&ab,l->buf,l->len); + + /* If we are at the very end of the screen with our prompt, we need to + * emit a newline and move the prompt to the first column. */ + if (l->pos && + l->pos == l->len && + (l->pos+plen) % l->cols == 0) + { + lndebug(""); + abAppend(&ab,"\n",1); + snprintf(seq,64,"\r"); + abAppend(&ab,seq,strlen(seq)); + rows++; + if (rows > (int)l->maxrows) + l->maxrows = rows; + } + + /* Move cursor to right position. */ + rpos2 = (plen+l->pos+l->cols)/l->cols; /* current cursor relative row. */ + lndebug("rpos2 %d", rpos2); + + /* Go up till we reach the expected positon. */ + if (rows-rpos2 > 0) { + lndebug("go-up %d", rows-rpos2); + snprintf(seq,64,"\x1b[%dA", rows-rpos2); + abAppend(&ab,seq,strlen(seq)); + } + + /* Set column. */ + col = (plen+(int)l->pos) % (int)l->cols; + lndebug("set col %d", 1+col); + if (col) + snprintf(seq,64,"\r\x1b[%dC", col); + else + snprintf(seq,64,"\r"); + abAppend(&ab,seq,strlen(seq)); + + lndebug("\n"); + l->oldpos = l->pos; + + if (write(fd,ab.b,ab.len) == -1) { + /* Can't recover from write error. */ + } + abFree(&ab); +} + +/* Calls the two low level functions refreshSingleLine() or + * refreshMultiLine() according to the selected mode. */ +static void refreshLine(struct linenoiseState *l) +{ + if (mlmode) + refreshMultiLine(l); + else + refreshSingleLine(l); +} + +/* Insert the character 'c' at cursor current position. + * + * On error writing to the terminal -1 is returned, otherwise 0. */ +static int edit_insert(struct linenoiseState *l, char c) +{ + if (l->len < l->buflen) { + if (l->len == l->pos) { + l->buf[l->pos] = c; + l->pos++; + l->len++; + l->buf[l->len] = '\0'; + if ((!mlmode && l->plen+l->len < l->cols) /* || mlmode */) { + /* Avoid a full update of the line in the + * trivial case. */ + if (write(l->ofd,&c,1) == -1) + return -1; + } else { + refreshLine(l); + } + } else { + memmove(l->buf+l->pos+1,l->buf+l->pos,l->len-l->pos); + l->buf[l->pos] = c; + l->len++; + l->pos++; + l->buf[l->len] = '\0'; + refreshLine(l); + } + } + return 0; +} + +/* Move cursor on the left. */ +static void edit_move_left(struct linenoiseState *l) +{ + if (l->pos > 0) { + l->pos--; + refreshLine(l); + } +} + +/* Move cursor on the right. */ +static void edit_move_right(struct linenoiseState *l) +{ + if (l->pos != l->len) { + l->pos++; + refreshLine(l); + } +} + +/* Move cursor to the start of the line. */ +static void edit_move_home(struct linenoiseState *l) +{ + if (l->pos != 0) { + l->pos = 0; + refreshLine(l); + } +} + +/* Move cursor to the end of the line. */ +static void edit_move_end(struct linenoiseState *l) +{ + if (l->pos != l->len) { + l->pos = l->len; + refreshLine(l); + } +} + +/* Substitute the currently edited line with the next or previous history + * entry as specified by 'dir'. */ +#define LINENOISE_HISTORY_NEXT 0 +#define LINENOISE_HISTORY_PREV 1 + +static void edit_history_next(struct linenoiseState *l, int dir) +{ + if (history_len > 1) { + /* Update the current history entry before to + * overwrite it with the next one. */ + free(history[history_len - 1 - l->history_index]); + history[history_len - 1 - l->history_index] = strdup(l->buf); + /* Show the new entry */ + l->history_index += (dir == LINENOISE_HISTORY_PREV) ? 1 : -1; + if (l->history_index < 0) { + l->history_index = 0; + return; + } else if (l->history_index >= history_len) { + l->history_index = history_len-1; + return; + } + strncpy(l->buf,history[history_len - 1 - l->history_index],l->buflen); + l->buf[l->buflen-1] = '\0'; + l->len = l->pos = strlen(l->buf); + refreshLine(l); + } +} + +/* Delete the character at the right of the cursor without altering the cursor + * position. Basically this is what happens with the "Delete" keyboard key. */ +static void edit_delete(struct linenoiseState *l) +{ + if (l->len > 0 && l->pos < l->len) { + memmove(l->buf+l->pos,l->buf+l->pos+1,l->len-l->pos-1); + l->len--; + l->buf[l->len] = '\0'; + refreshLine(l); + } +} + +/* Backspace implementation. */ +static void edit_backspace(struct linenoiseState *l) +{ + if (l->pos > 0 && l->len > 0) { + memmove(l->buf+l->pos-1,l->buf+l->pos,l->len-l->pos); + l->pos--; + l->len--; + l->buf[l->len] = '\0'; + refreshLine(l); + } +} + +/* Delete the previosu word, maintaining the cursor at the start of the + * current word. */ +static void edit_delete_prev_word(struct linenoiseState *l) +{ + size_t old_pos = l->pos; + size_t diff; + + while (l->pos > 0 && l->buf[l->pos-1] == ' ') + l->pos--; + while (l->pos > 0 && l->buf[l->pos-1] != ' ') + l->pos--; + diff = old_pos - l->pos; + memmove(l->buf+l->pos,l->buf+old_pos,l->len-old_pos+1); + l->len -= diff; + refreshLine(l); +} + +/* This function is the core of the line editing capability of linenoise. + * It expects 'fd' to be already in "raw mode" so that every key pressed + * will be returned ASAP to read(). + * + * The resulting string is put into 'buf' when the user type enter, or + * when ctrl+d is typed. + * + * The function returns the length of the current buffer. */ +static int edit(int stdin_fd, int stdout_fd, char *buf, size_t buflen, const char *prompt) +{ + struct linenoiseState l; + + /* Populate the linenoise state that we pass to functions implementing + * specific editing functionalities. */ + l.ifd = stdin_fd; + l.ofd = stdout_fd; + l.buf = buf; + l.buflen = buflen; + l.prompt = prompt; + l.plen = strlen(prompt); + l.oldpos = l.pos = 0; + l.len = 0; + l.cols = getColumns(stdin_fd, stdout_fd); + l.maxrows = 0; + l.history_index = 0; + + /* Buffer starts empty. */ + l.buf[0] = '\0'; + l.buflen--; /* Make sure there is always space for the nulterm */ + + /* The latest history entry is always our current buffer, that + * initially is just an empty string. */ + add_history(""); + + if (write(l.ofd,prompt,l.plen) == -1) + return -1; + while(1) { + char c; + int nread; + char seq[3]; + + nread = read(l.ifd,&c,1); + if (nread <= 0) + return l.len; + + switch(c) { + case ENTER: /* enter */ + history_len--; + free(history[history_len]); + if (mlmode) + edit_move_end(&l); + return (int)l.len; + case CTRL_C: /* ctrl-c */ + errno = EAGAIN; + return -1; + case BACKSPACE: /* backspace */ + case 8: /* ctrl-h */ + edit_backspace(&l); + break; + case CTRL_D: /* ctrl-d, remove char at right of cursor, or if the + line is empty, act as end-of-file. */ + if (l.len > 0) { + edit_delete(&l); + } else { + history_len--; + free(history[history_len]); + return -1; + } + break; + case CTRL_T: /* ctrl-t, swaps current character with previous. */ + if (l.pos > 0 && l.pos < l.len) { + int aux = buf[l.pos-1]; + buf[l.pos-1] = buf[l.pos]; + buf[l.pos] = aux; + if (l.pos != l.len-1) + l.pos++; + refreshLine(&l); + } + break; + case CTRL_B: /* ctrl-b */ + edit_move_left(&l); + break; + case CTRL_F: /* ctrl-f */ + edit_move_right(&l); + break; + case CTRL_P: /* ctrl-p */ + edit_history_next(&l, LINENOISE_HISTORY_PREV); + break; + case CTRL_N: /* ctrl-n */ + edit_history_next(&l, LINENOISE_HISTORY_NEXT); + break; + case ESC: /* escape sequence */ + /* Read the next two bytes representing the escape sequence. + * Use two calls to handle slow terminals returning the two + * chars at different times. */ + if (read(l.ifd,seq,1) == -1) + break; + if (read(l.ifd,seq+1,1) == -1) + break; + + /* ESC [ sequences. */ + if (seq[0] == '[') { + if (seq[1] >= '0' && seq[1] <= '9') { + /* Extended escape, read additional byte. */ + if (read(l.ifd,seq+2,1) == -1) + break; + if (seq[2] == '~') { + switch(seq[1]) { + case '3': /* Delete key. */ + edit_delete(&l); + break; + } + } + } else { + switch(seq[1]) { + case 'A': /* Up */ + edit_history_next(&l, LINENOISE_HISTORY_PREV); + break; + case 'B': /* Down */ + edit_history_next(&l, LINENOISE_HISTORY_NEXT); + break; + case 'C': /* Right */ + edit_move_right(&l); + break; + case 'D': /* Left */ + edit_move_left(&l); + break; + case 'H': /* Home */ + edit_move_home(&l); + break; + case 'F': /* End*/ + edit_move_end(&l); + break; + } + } + } + + /* ESC O sequences. */ + else if (seq[0] == 'O') { + switch(seq[1]) { + case 'H': /* Home */ + edit_move_home(&l); + break; + case 'F': /* End*/ + edit_move_end(&l); + break; + } + } + break; + default: + if (edit_insert(&l,c)) + return -1; + break; + case CTRL_U: /* Ctrl+u, delete the whole line. */ + buf[0] = '\0'; + l.pos = l.len = 0; + refreshLine(&l); + break; + case CTRL_K: /* Ctrl+k, delete from current to end of line. */ + buf[l.pos] = '\0'; + l.len = l.pos; + refreshLine(&l); + break; + case CTRL_A: /* Ctrl+a, go to the start of the line */ + edit_move_home(&l); + break; + case CTRL_E: /* ctrl+e, go to the end of the line */ + edit_move_end(&l); + break; + case CTRL_L: /* ctrl+l, clear screen */ + readline_clear_screen(); + refreshLine(&l); + break; + case CTRL_W: /* ctrl+w, delete previous word */ + edit_delete_prev_word(&l); + break; + } + } + return l.len; +} + +/* This special mode is used by linenoise in order to print scan codes + * on screen for debugging / development purposes. It is implemented + * by the linenoise_example program using the --keycodes option. */ +void readline_print_keycodes(void) +{ + char quit[4]; + + printf("Linenoise key codes debugging mode.\n" + "Press keys to see scan codes. Type 'quit' at any time to exit.\n"); + if (enableRawMode(STDIN_FILENO) == -1) + return; + memset(quit,' ',4); + while(1) { + char c; + int nread; + + nread = read(STDIN_FILENO,&c,1); + if (nread <= 0) + continue; + memmove(quit,quit+1,sizeof(quit)-1); /* shift string to left. */ + quit[sizeof(quit)-1] = c; /* Insert current char on the right. */ + if (memcmp(quit,"quit",sizeof(quit)) == 0) + break; + + printf("'%c' %02x (%d) (type quit to exit)\n", + isprint(c) ? c : '?', (int)c, (int)c); + printf("\r"); /* Go left edge manually, we are in raw mode. */ + fflush(stdout); + } + disableRawMode(STDIN_FILENO); +} + +/* This function calls the line editing function edit() using + * the STDIN file descriptor set in raw mode. */ +static int linenoiseRaw(char *buf, size_t buflen, const char *prompt) +{ + int count; + + if (buflen == 0) { + errno = EINVAL; + return -1; + } + if (!isatty(STDIN_FILENO)) { + /* Not a tty: read from file / pipe. */ + if (fgets(buf, buflen, stdin) == NULL) + return -1; + count = strlen(buf); + if (count && buf[count-1] == '\n') { + count--; + buf[count] = '\0'; + } + } else { + /* Interactive editing. */ + if (enableRawMode(STDIN_FILENO) == -1) + return -1; + count = edit(STDIN_FILENO, STDOUT_FILENO, buf, buflen, prompt); + disableRawMode(STDIN_FILENO); + printf("\n"); + } + return count; +} + +/* The high level function that is the main API of the linenoise library. + * This function checks if the terminal has basic capabilities, just checking + * for a blacklist of stupid terminals, and later either calls the line + * editing function or uses dummy fgets() so that you will be able to type + * something even in the most desperate of the conditions. */ +char *readline(const char *prompt) +{ + char buf[LINENOISE_MAX_LINE]; + int count; + + if (isUnsupportedTerm()) { + size_t len; + + printf("%s",prompt); + fflush(stdout); + if (fgets(buf,LINENOISE_MAX_LINE,stdin) == NULL) + return NULL; + len = strlen(buf); + while(len && (buf[len-1] == '\n' || buf[len-1] == '\r')) { + len--; + buf[len] = '\0'; + } + return strdup(buf); + } else { + count = linenoiseRaw(buf,LINENOISE_MAX_LINE,prompt); + if (count == -1) + return NULL; + return strdup(buf); + } +} + +/* ================================ History ================================= */ + +/* Free the history, but does not reset it. Only used when we have to + * exit() to avoid memory leaks are reported by valgrind & co. */ +static void freeHistory(void) +{ + if (history) { + int j; + + for (j = 0; j < history_len; j++) + free(history[j]); + free(history); + } +} + +/* At exit we'll try to fix the terminal to the initial conditions. */ +static void linenoiseAtExit(void) +{ + disableRawMode(STDIN_FILENO); + freeHistory(); +} + +/* This is the API call to add a new entry in the linenoise history. + * It uses a fixed array of char pointers that are shifted (memmoved) + * when the history max length is reached in order to remove the older + * entry and make room for the new one, so it is not exactly suitable for huge + * histories, but will work well for a few hundred of entries. + * + * Using a circular buffer is smarter, but a bit more complex to handle. */ +void add_history(const char *line) +{ + char *linecopy; + + if (history_max_len == 0) + return; + + /* Initialization on first call. */ + if (history == NULL) { + history = malloc(sizeof(char*)*history_max_len); + if (history == NULL) + return; + memset(history,0,(sizeof(char*)*history_max_len)); + } + + /* Don't add duplicated lines. */ + if (history_len && !strcmp(history[history_len-1], line)) + return; + + /* Add an heap allocated copy of the line in the history. + * If we reached the max length, remove the older line. */ + linecopy = strdup(line); + if (!linecopy) + return; + if (history_len == history_max_len) { + free(history[0]); + memmove(history,history+1,sizeof(char*)*(history_max_len-1)); + history_len--; + } + history[history_len] = linecopy; + history_len++; +} + +/* Set the maximum length for the history. This function can be called even + * if there is already some history, the function will make sure to retain + * just the latest 'len' elements if the new history length value is smaller + * than the amount of items already inside the history. */ +int history_set_length(int len) +{ + char **new; + + if (len < 1) + return 0; + if (history) { + int tocopy = history_len; + + new = malloc(sizeof(char*)*len); + if (new == NULL) + return 0; + + /* If we can't copy everything, free the elements we'll not use. */ + if (len < tocopy) { + int j; + + for (j = 0; j < tocopy-len; j++) free(history[j]); + tocopy = len; + } + memset(new,0,sizeof(char*)*len); + memcpy(new,history+(history_len-tocopy), sizeof(char*)*tocopy); + free(history); + history = new; + } + history_max_len = len; + if (history_len > history_max_len) + history_len = history_max_len; + return 1; +} + +/* Save the history in the specified file. On success 0 is returned + * otherwise -1 is returned. */ +int write_history(const char *filename) +{ + FILE *fp = fopen(filename,"w"); + int j; + + if (fp == NULL) + return -1; + for (j = 0; j < history_len; j++) + fprintf(fp,"%s\n",history[j]); + fclose(fp); + return 0; +} + +/* Load the history from the specified file. If the file does not exist + * zero is returned and no operation is performed. + * + * If the file exists and the operation succeeded 0 is returned, otherwise + * on error -1 is returned. */ +int read_history(const char *filename) +{ + FILE *fp = fopen(filename,"r"); + char buf[LINENOISE_MAX_LINE]; + + if (fp == NULL) + return -1; + + while (fgets(buf,LINENOISE_MAX_LINE,fp) != NULL) { + char *p; + + p = strchr(buf,'\r'); + if (!p) + p = strchr(buf,'\n'); + if (p) + *p = '\0'; + add_history(buf); + } + fclose(fp); + return 0; +} diff --git a/src/libreadline/readline.h b/src/libreadline/readline.h new file mode 100644 index 0000000..523633d --- /dev/null +++ b/src/libreadline/readline.h @@ -0,0 +1,74 @@ +/* + * Guerrilla line editing library against the idea that a line editing lib + * needs to be 20,000 lines of C code. + * + * Based on linenoise.c with API modified for compatibility with + * traditional readline library. + * + * ------------------------------------------------------------------------ + * + * Copyright (c) 2010-2014, Salvatore Sanfilippo + * Copyright (c) 2010-2013, Pieter Noordhuis + * Copyright (c) 2015, Serge Vakulenko + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "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 COPYRIGHT + * HOLDER OR CONTRIBUTORS 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. + */ +#ifndef __READLINE_H +#define __READLINE_H + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Read a line of input. + * Prompt with PROMPT. + * A NULL PROMPT means none. + */ +char *readline(const char *prompt); + +/* + * Clear the screen. + * Used to handle Ctrl+L. + */ +void readline_clear_screen(void); + +/* + * Set if to use or not the multi line mode. + */ +void readline_set_multiline(int ml); + +/* + * This routine is used in order to print scan codes on screen + * for debugging / development purposes. + */ +void readline_print_keycodes(void); + +#ifdef __cplusplus +} +#endif + +#endif /* __READLINE_H */