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