1 /***********************************************************************
2 * *
3 * This software is part of the ast package *
4 * Copyright (c) 1985-2011 AT&T Intellectual Property *
5 * and is licensed under the *
6 * Eclipse Public License, Version 1.0 *
7 * by AT&T Intellectual Property *
8 * *
9 * A copy of the License is available at *
10 * http://www.eclipse.org/org/documents/epl-v10.html *
11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
12 * *
13 * Information and Software Systems Research *
14 * AT&T Research *
15 * Florham Park NJ *
16 * *
17 * Glenn Fowler <gsf@research.att.com> *
18 * David Korn <dgk@research.att.com> *
19 * Phong Vo <kpv@research.att.com> *
20 * *
21 ***********************************************************************/
22 #pragma prototyped
23
24 #include "stdhdr.h"
25
26 int
setvbuf(Sfio_t * f,char * buf,int type,size_t size)27 setvbuf(Sfio_t* f, char* buf, int type, size_t size)
28 {
29 STDIO_INT(f, "setvbuf", int, (Sfio_t*, char*, int, size_t), (f, buf, type, size))
30
31 if (type == _IOLBF)
32 sfset(f, SF_LINE, 1);
33 else if (f->flags & SF_STRING)
34 return -1;
35 else if (type == _IONBF)
36 {
37 sfsync(f);
38 sfsetbuf(f, NiL, 0);
39 }
40 else if (type == _IOFBF)
41 {
42 if (size == 0)
43 size = SF_BUFSIZE;
44 sfsync(f);
45 sfsetbuf(f, (Void_t*)buf, size);
46 }
47 return 0;
48 }
49