/* * setbuf.c - control buffering of a stream *//* $Id: setvbuf.c,v 1.1.1.1 2005/04/21 14:56:36 beng Exp $ */#include	<stdio.h>#include	<stdlib.h>#include	"loc_incl.h"extern void (*_clean)(void);intsetvbuf(register FILE *stream, char *buf, int mode, size_t size){	int retval = 0;	_clean = __cleanup;	if (mode != _IOFBF && mode != _IOLBF && mode != _IONBF)		return EOF;	if (stream->_buf && io_testflag(stream,_IOMYBUF) )		free((void *)stream->_buf);	stream->_flags &= ~(_IOMYBUF | _IONBF | _IOLBF);	if (buf && size <= 0) retval = EOF;	if (!buf && (mode != _IONBF)) {		if (size <= 0 || (buf = (char *) malloc(size)) == NULL) {			retval = EOF;		} else {			stream->_flags |= _IOMYBUF;		}	}	stream->_buf = (unsigned char *) buf;	stream->_count = 0;	stream->_flags |= mode;	stream->_ptr = stream->_buf;	if (!buf) {		stream->_bufsiz = 1;	} else {		stream->_bufsiz = size;	}	return retval;}