/* * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * and/or other materials related to such * distribution and use acknowledge that the software was developed * by the University of California, Berkeley.  The name of the * University 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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. *//* Modified copy of setbuf.c to support the setbuffer functiondefined as part of BSD.Modifications by Gareth Pearce, 2001.*/ /*FUNCTION<<setbuffer>>---specify full buffering for a file or stream with size INDEX	setbuffer SYNOPSIS	#include <stdio.h>	void setbuffer(FILE *<[fp]>, char *<[buf]>, int <[size]>); DESCRIPTION<<setbuffer>> specifies that output to the file or stream identified by<[fp]> should be fully buffered.  All output for this file will go to abuffer (of size <[size]>).  Output will be passed on to the host systemonly when the buffer is full, or when an input operation intervenes. You may, if you wish, supply your own buffer by passing a pointer toit as the argument <[buf]>.  It must have size <[size]>.  You canalso use <<NULL>> as the value of <[buf]>, to signal that the<<setbuffer>> function is to allocate the buffer. WARNINGSYou may only use <<setbuffer>> before performing any file operationother than opening the file. If you supply a non-null <[buf]>, you must ensure that the associatedstorage continues to be available until you close the streamidentified by <[fp]>. RETURNS<<setbuffer>> does not return a result. PORTABILITYThis function comes from BSD not ANSI or POSIX. Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,<<lseek>>, <<read>>, <<sbrk>>, <<write>>.*/ #include <_ansi.h>#include <stdio.h>#include "local.h" voidsetbuffer (FILE * fp,       char *buf,       int size){  (void) setvbuf (fp, buf, buf ? _IOFBF : _IONBF, (size_t) size);}