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 sprintf.c */
18 /* This code created by modifying sprintf.c so copyright inherited. */
19
20 #define _DEFAULT_SOURCE
21 #include <_ansi.h>
22 #include <stdio.h>
23 #include <stdarg.h>
24 #include <limits.h>
25 #include <errno.h>
26 #include "local.h"
27
28 #undef snprintf
29 int
snprintf(char * __restrict str,size_t size,const char * __restrict fmt,...)30 snprintf (
31 char *__restrict str,
32 size_t size,
33 const char *__restrict fmt, ...)
34 {
35 int ret;
36 va_list ap;
37 FILE f;
38
39 if (size > INT_MAX)
40 {
41 _REENT_ERRNO(ptr) = EOVERFLOW;
42 return EOF;
43 }
44 f._flags = __SWR | __SSTR;
45 f._flags2 = 0;
46 f._bf._base = f._p = (unsigned char *) str;
47 f._bf._size = f._w = (size > 0 ? size - 1 : 0);
48 f._file = -1; /* No file. */
49 va_start (ap, fmt);
50 ret = svfprintf (&f, fmt, ap);
51 va_end (ap);
52 if (ret < EOF)
53 _REENT_ERRNO(ptr) = EOVERFLOW;
54 if (size > 0)
55 *f._p = 0;
56 return (ret);
57 }
58
59 #ifdef _NANO_FORMATTED_IO
60 int
61 sniprintf (char *, size_t, const char *, ...)
62 _ATTRIBUTE ((__alias__("snprintf")));
63 #endif
64
65 #ifdef __LONG_DOUBLE_IEEE128__
66 #if defined(_HAVE_ALIAS_ATTRIBUTE)
67 #ifndef __clang__
68 #pragma GCC diagnostic ignored "-Wmissing-attributes"
69 #endif
70 __strong_reference(snprintf, __snprintfieee128);
71 #endif
72 #endif
73
