1 /*
2 * Copyright (c) 1990 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 vfprintf.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
32 int
vsnprintf(char * __restrict str,size_t size,const char * __restrict fmt,va_list ap)33 vsnprintf (
34 char *__restrict str,
35 size_t size,
36 const char *__restrict fmt,
37 va_list ap)
38 {
39 int ret;
40 FILE f;
41
42 if (size > INT_MAX)
43 {
44 _REENT_ERRNO(ptr) = EOVERFLOW;
45 return EOF;
46 }
47 f._flags = __SWR | __SSTR;
48 f._flags2 = 0;
49 f._bf._base = f._p = (unsigned char *) str;
50 f._bf._size = f._w = (size > 0 ? size - 1 : 0);
51 f._file = -1; /* No file. */
52 ret = svfprintf ( &f, fmt, ap);
53 if (ret < EOF)
54 _REENT_ERRNO(ptr) = EOVERFLOW;
55 if (size > 0)
56 *f._p = 0;
57 return ret;
58 }
59
60 #ifdef _NANO_FORMATTED_IO
61 int __nonnull((1)) _NOTHROW
62 vsniprintf (char *, size_t, const char *, __VALIST)
63 _ATTRIBUTE ((__alias__("vsnprintf")));
64 #endif
65
66 #ifdef __LONG_DOUBLE_IEEE128__
67 #if defined(_HAVE_ALIAS_ATTRIBUTE)
68 #ifndef __clang__
69 #pragma GCC diagnostic ignored "-Wmissing-attributes"
70 #endif
71 __strong_reference(vsnprintf, __vsnprintfieee128);
72 #endif
73 #endif
74
