1 /*- 2 * Copyright (c) 2013-2015 Sandvine Inc. All rights reserved. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/malloc.h> 33 34 #include <machine/stdarg.h> 35 36 int 37 vasprintf(char **buf, struct malloc_type *mtp, const char *format, va_list va) 38 { 39 int len, ret; 40 va_list tmp_va; 41 char dummy; 42 43 va_copy(tmp_va, va); 44 len = vsnprintf(&dummy, 0, format, tmp_va); 45 va_end(tmp_va); 46 if (len < 0) { 47 *buf = NULL; 48 return (len); 49 } 50 51 /* Account for null terminator. */ 52 len += 1; 53 *buf = malloc(len, mtp, M_NOWAIT); 54 if (*buf == NULL) 55 return (-1); 56 57 ret = vsnprintf(*buf, len, format, va); 58 if (ret < 0) { 59 free(*buf, mtp); 60 *buf = NULL; 61 } 62 63 return (ret); 64 } 65 66 int 67 asprintf(char **buf, struct malloc_type *mtp, const char *format, ...) 68 { 69 int ret; 70 va_list va; 71 72 va_start(va, format); 73 ret = vasprintf(buf, mtp, format, va); 74 va_end(va); 75 76 return (ret); 77 } 78