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 * 3. 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 <errno.h> 45 #include <limits.h> 46 #include <stdio.h> 47 #include <stdarg.h> 48 #include "xlocale_private.h" 49 50 #include "local.h" 51 52 int 53 snprintf(char * __restrict str, size_t n, char const * __restrict fmt, ...) 54 { 55 size_t on; 56 int ret; 57 va_list ap; 58 FILE f = FAKE_FILE; 59 60 on = n; 61 if (n != 0) 62 n--; 63 if (n > INT_MAX) { 64 errno = EOVERFLOW; 65 *str = '\0'; 66 return (EOF); 67 } 68 va_start(ap, fmt); 69 f._flags = __SWR | __SSTR; 70 f._bf._base = f._p = (unsigned char *)str; 71 f._bf._size = f._w = n; 72 ret = __vfprintf(&f, __get_locale(), fmt, ap); 73 if (on > 0) 74 *f._p = '\0'; 75 va_end(ap); 76 return (ret); 77 } 78 int 79 snprintf_l(char * __restrict str, size_t n, locale_t locale, 80 char const * __restrict fmt, ...) 81 { 82 size_t on; 83 int ret; 84 va_list ap; 85 FILE f = FAKE_FILE; 86 FIX_LOCALE(locale); 87 88 on = n; 89 if (n != 0) 90 n--; 91 if (n > INT_MAX) { 92 errno = EOVERFLOW; 93 *str = '\0'; 94 return (EOF); 95 } 96 va_start(ap, fmt); 97 f._flags = __SWR | __SSTR; 98 f._bf._base = f._p = (unsigned char *)str; 99 f._bf._size = f._w = n; 100 ret = __vfprintf(&f, locale, fmt, ap); 101 if (on > 0) 102 *f._p = '\0'; 103 va_end(ap); 104 return (ret); 105 } 106