11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1990, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * This code is derived from software contributed to Berkeley by 61573Srgrimes * Chris Torek. 71573Srgrimes * 8227753Stheraven * Copyright (c) 2011 The FreeBSD Foundation 9227753Stheraven * All rights reserved. 10227753Stheraven * Portions of this software were developed by David Chisnall 11227753Stheraven * under sponsorship from the FreeBSD Foundation. 12227753Stheraven * 131573Srgrimes * Redistribution and use in source and binary forms, with or without 141573Srgrimes * modification, are permitted provided that the following conditions 151573Srgrimes * are met: 161573Srgrimes * 1. Redistributions of source code must retain the above copyright 171573Srgrimes * notice, this list of conditions and the following disclaimer. 181573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 191573Srgrimes * notice, this list of conditions and the following disclaimer in the 201573Srgrimes * documentation and/or other materials provided with the distribution. 21249808Semaste * 3. Neither the name of the University nor the names of its contributors 221573Srgrimes * may be used to endorse or promote products derived from this software 231573Srgrimes * without specific prior written permission. 241573Srgrimes * 251573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 261573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 271573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 281573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 291573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 301573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 311573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 321573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 331573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 341573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 351573Srgrimes * SUCH DAMAGE. 361573Srgrimes */ 371573Srgrimes 381573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 391573Srgrimesstatic char sccsid[] = "@(#)vsnprintf.c 8.1 (Berkeley) 6/4/93"; 401573Srgrimes#endif /* LIBC_SCCS and not lint */ 4192986Sobrien#include <sys/cdefs.h> 4292986Sobrien__FBSDID("$FreeBSD$"); 431573Srgrimes 44234531Sdas#include <errno.h> 4532168Sache#include <limits.h> 461573Srgrimes#include <stdio.h> 4771579Sdeischen#include "local.h" 48227753Stheraven#include "xlocale_private.h" 491573Srgrimes 5013545Sjulianint 51227753Stheravenvsnprintf_l(char * __restrict str, size_t n, locale_t locale, 52227753Stheraven const char * __restrict fmt, __va_list ap) 531573Srgrimes{ 5432168Sache size_t on; 551573Srgrimes int ret; 56117147Sjkh char dummy[2]; 57205021Sjhb FILE f = FAKE_FILE; 58227753Stheraven FIX_LOCALE(locale); 591573Srgrimes 6031980Sache on = n; 6132168Sache if (n != 0) 6231980Sache n--; 63234531Sdas if (n > INT_MAX) { 64234531Sdas errno = EOVERFLOW; 65234531Sdas *str = '\0'; 66234531Sdas return (EOF); 67234531Sdas } 68103480Smaxim /* Stdio internals do not deal correctly with zero length buffer */ 69103480Smaxim if (n == 0) { 70117147Sjkh if (on > 0) 71117147Sjkh *str = '\0'; 72117147Sjkh str = dummy; 73117147Sjkh n = 1; 74103480Smaxim } 751573Srgrimes f._flags = __SWR | __SSTR; 761573Srgrimes f._bf._base = f._p = (unsigned char *)str; 7731966Sache f._bf._size = f._w = n; 78227753Stheraven ret = __vfprintf(&f, locale, fmt, ap); 7931980Sache if (on > 0) 8031980Sache *f._p = '\0'; 8131980Sache return (ret); 821573Srgrimes} 83227753Stheravenint 84227753Stheravenvsnprintf(char * __restrict str, size_t n, const char * __restrict fmt, 85227753Stheraven __va_list ap) 86227753Stheraven{ 87227753Stheraven return vsnprintf_l(str, n, __get_locale(), fmt, ap); 88227753Stheraven} 89