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 * 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) 41 static 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 54 int 55 snprintf(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 } 80 int 81 snprintf_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