1 /*
2 * Copyright (c) 1990, 2007 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms are permitted
6 * provided that the above copyright notice and this paragraph are
7 * duplicated in all such forms and that any documentation,
8 * and/or other materials related to such
9 * distribution and use acknowledge that the software was developed
10 * by the University of California, Berkeley. The name of the
11 * University may not be used to endorse or promote products derived
12 * from this software without specific prior written permission.
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
16 */
17 /* doc in viprintf.c */
18
19 #if defined(LIBC_SCCS) && !defined(lint)
20 static char sccsid[] = "%W% (Berkeley) %G%";
21 #endif /* LIBC_SCCS and not lint */
22
23 #define _DEFAULT_SOURCE
24 #include <_ansi.h>
25 #include <stdio.h>
26 #include <limits.h>
27 #include <stdarg.h>
28 #include <errno.h>
29
30 #include "local.h"
31
vsniprintf(char * str,size_t size,const char * fmt,va_list ap)32 vsniprintf (
33 char *str,
34 size_t size,
35 const char *fmt,
36 va_list ap)
37 {
38 int ret;
39 FILE f;
40
41 if (size > INT_MAX)
42 {
43 _REENT_ERRNO(ptr) = EOVERFLOW;
44 return EOF;
45 }
46 f._flags = __SWR | __SSTR;
47 f._flags2 = 0;
48 f._bf._base = f._p = (unsigned char *) str;
49 f._bf._size = f._w = (size > 0 ? size - 1 : 0);
50 f._file = -1; /* No file. */
51 ret = svfiprintf ( &f, fmt, ap);
52 if (ret < EOF)
53 _REENT_ERRNO(ptr) = EOVERFLOW;
54 if (size > 0)
55 *f._p = 0;
56 return ret;
57 }
58
