Initial revision

2005-04-21 14:53:53 +00:00
commit 9865aeaa79
2264 changed files with 411685 additions and 0 deletions
--- a/lib/stdio/flushbuf.c
+++ b/lib/stdio/flushbuf.c
@@ -0,0 +1,127 @@
+/*
+ * flushbuf.c - flush a buffer
+ */
+/* $Id$ */
+
+#include	<stdio.h>
+#include	<stdlib.h>
+#include	"loc_incl.h"
+
+#include	<sys/types.h>
+
+off_t _lseek(int fildes, off_t offset, int whence);
+ssize_t _write(int d, const char *buf, int nbytes);
+int _isatty(int d);
+extern void (*_clean)(void);
+
+static int
+do_write(int d, char *buf, int nbytes)
+{
+	int c;
+
+	/* POSIX actually allows write() to return a positive value less
+	   than nbytes, so loop ...
+	*/
+	while ((c = _write(d, buf, nbytes)) > 0 && c < nbytes) {
+		nbytes -= c;
+		buf += c;
+	}
+	return c > 0;
+}
+
+int
+__flushbuf(int c, FILE * stream)
+{
+	_clean = __cleanup;
+	if (fileno(stream) < 0) return (unsigned char) c;
+	if (!io_testflag(stream, _IOWRITE)) return EOF;
+	if (io_testflag(stream, _IOREADING) && !feof(stream)) return EOF;
+
+	stream->_flags &= ~_IOREADING;
+	stream->_flags |= _IOWRITING;
+	if (!io_testflag(stream, _IONBF)) {
+		if (!stream->_buf) {
+			if (stream == stdout && _isatty(fileno(stdout))) {
+				if (!(stream->_buf =
+					    (unsigned char *) malloc(BUFSIZ))) {
+					stream->_flags |= _IONBF;
+				} else {
+					stream->_flags |= _IOLBF|_IOMYBUF;
+					stream->_bufsiz = BUFSIZ;
+					stream->_count = -1;
+				}
+			} else {
+				if (!(stream->_buf =
+					    (unsigned char *) malloc(BUFSIZ))) {
+					stream->_flags |= _IONBF;
+				} else {
+					stream->_flags |= _IOMYBUF;
+					stream->_bufsiz = BUFSIZ;
+					if (!io_testflag(stream, _IOLBF))
+						stream->_count = BUFSIZ - 1;
+					else	stream->_count = -1;
+				}
+			}
+			stream->_ptr = stream->_buf;
+		}
+	}
+
+	if (io_testflag(stream, _IONBF)) {
+		char c1 = c;
+
+		stream->_count = 0;
+		if (io_testflag(stream, _IOAPPEND)) {
+			if (_lseek(fileno(stream), 0L, SEEK_END) == -1) {
+				stream->_flags |= _IOERR;
+				return EOF;
+			}
+		}
+		if (_write(fileno(stream), &c1, 1) != 1) {
+			stream->_flags |= _IOERR;
+			return EOF;
+		}
+		return (unsigned char) c;
+	} else if (io_testflag(stream, _IOLBF)) {
+		*stream->_ptr++ = c;
+		/* stream->_count has been updated in putc macro. */
+		if (c == '\n' || stream->_count == -stream->_bufsiz) {
+			int count = -stream->_count;
+
+			stream->_ptr  = stream->_buf;
+			stream->_count = 0;
+
+			if (io_testflag(stream, _IOAPPEND)) {
+				if (_lseek(fileno(stream), 0L, SEEK_END) == -1) {
+					stream->_flags |= _IOERR;
+					return EOF;
+				}
+			}
+			if (! do_write(fileno(stream), (char *)stream->_buf,
+					count)) {
+				stream->_flags |= _IOERR;
+				return EOF;
+			}
+		}
+	} else {
+		int count = stream->_ptr - stream->_buf;
+
+		stream->_count = stream->_bufsiz - 1;
+		stream->_ptr = stream->_buf + 1;
+
+		if (count > 0) {
+			if (io_testflag(stream, _IOAPPEND)) {
+				if (_lseek(fileno(stream), 0L, SEEK_END) == -1) {
+					stream->_flags |= _IOERR;
+					return EOF;
+				}
+			}
+			if (! do_write(fileno(stream), (char *)stream->_buf, count)) {
+				*(stream->_buf) = c;
+				stream->_flags |= _IOERR;
+				return EOF;
+			}
+		}
+		*(stream->_buf) = c;
+	}
+	return (unsigned char) c;
+}