/* * flushbuf.c - flush a buffer *//* $Id: flushbuf.c,v 1.1.1.1 2005/04/21 14:56:35 beng Exp $ */#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 intdo_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;}