1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1990, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 * All rights reserved.
9 * Portions of this software were developed by David Chisnall
10 * under sponsorship from the FreeBSD Foundation.
11 *
12 * This code is derived from software contributed to Berkeley by
13 * Chris Torek.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 *    notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 *    notice, this list of conditions and the following disclaimer in the
22 *    documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the University nor the names of its contributors
24 *    may be used to endorse or promote products derived from this software
25 *    without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40#if defined(LIBC_SCCS) && !defined(lint)
41static char sccsid[] = "@(#)snprintf.c	8.1 (Berkeley) 6/4/93";
42#endif /* LIBC_SCCS and not lint */
43#include <sys/cdefs.h>
44__FBSDID("$FreeBSD$");
45
46#include <errno.h>
47#include <limits.h>
48#include <stdio.h>
49#include <stdarg.h>
50#include "xlocale_private.h"
51
52#include "local.h"
53
54int
55snprintf(char * __restrict str, size_t n, char const * __restrict fmt, ...)
56{
57	size_t on;
58	int ret;
59	va_list ap;
60	FILE f = FAKE_FILE;
61
62	on = n;
63	if (n != 0)
64		n--;
65	if (n > INT_MAX) {
66		errno = EOVERFLOW;
67		*str = '\0';
68		return (EOF);
69	}
70	va_start(ap, fmt);
71	f._flags = __SWR | __SSTR;
72	f._bf._base = f._p = (unsigned char *)str;
73	f._bf._size = f._w = n;
74	ret = __vfprintf(&f, __get_locale(), fmt, ap);
75	if (on > 0)
76		*f._p = '\0';
77	va_end(ap);
78	return (ret);
79}
80int
81snprintf_l(char * __restrict str, size_t n, locale_t locale,
82		char const * __restrict fmt, ...)
83{
84	size_t on;
85	int ret;
86	va_list ap;
87	FILE f = FAKE_FILE;
88	FIX_LOCALE(locale);
89
90	on = n;
91	if (n != 0)
92		n--;
93	if (n > INT_MAX) {
94		errno = EOVERFLOW;
95		*str = '\0';
96		return (EOF);
97	}
98	va_start(ap, fmt);
99	f._flags = __SWR | __SSTR;
100	f._bf._base = f._p = (unsigned char *)str;
101	f._bf._size = f._w = n;
102	ret = __vfprintf(&f, locale, fmt, ap);
103	if (on > 0)
104		*f._p = '\0';
105	va_end(ap);
106	return (ret);
107}
108