1*5087Sjp161948 /* 2*5087Sjp161948 * Copyright (c) 2004 Darren Tucker. 3*5087Sjp161948 * 4*5087Sjp161948 * Based originally on asprintf.c from OpenBSD: 5*5087Sjp161948 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> 6*5087Sjp161948 * 7*5087Sjp161948 * Permission to use, copy, modify, and distribute this software for any 8*5087Sjp161948 * purpose with or without fee is hereby granted, provided that the above 9*5087Sjp161948 * copyright notice and this permission notice appear in all copies. 10*5087Sjp161948 * 11*5087Sjp161948 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12*5087Sjp161948 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13*5087Sjp161948 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14*5087Sjp161948 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15*5087Sjp161948 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16*5087Sjp161948 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17*5087Sjp161948 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18*5087Sjp161948 */ 19*5087Sjp161948 20*5087Sjp161948 #pragma ident "%Z%%M% %I% %E% SMI" 21*5087Sjp161948 22*5087Sjp161948 #include "includes.h" 23*5087Sjp161948 24*5087Sjp161948 #ifndef HAVE_VASPRINTF 25*5087Sjp161948 26*5087Sjp161948 #include <errno.h> 27*5087Sjp161948 #include <stdarg.h> 28*5087Sjp161948 #include <stdlib.h> 29*5087Sjp161948 30*5087Sjp161948 #ifndef VA_COPY 31*5087Sjp161948 #ifdef HAVE_VA_COPY 32*5087Sjp161948 #define VA_COPY(dest, src) va_copy(dest, src) 33*5087Sjp161948 #else 34*5087Sjp161948 #ifdef HAVE___VA_COPY 35*5087Sjp161948 #define VA_COPY(dest, src) __va_copy(dest, src) 36*5087Sjp161948 #else 37*5087Sjp161948 #define VA_COPY(dest, src) (dest) = (src) 38*5087Sjp161948 #endif 39*5087Sjp161948 #endif 40*5087Sjp161948 #endif 41*5087Sjp161948 42*5087Sjp161948 #define INIT_SZ 128 43*5087Sjp161948 44*5087Sjp161948 int 45*5087Sjp161948 vasprintf(char **str, const char *fmt, va_list ap) 46*5087Sjp161948 { 47*5087Sjp161948 int ret = -1; 48*5087Sjp161948 va_list ap2; 49*5087Sjp161948 char *string, *newstr; 50*5087Sjp161948 size_t len; 51*5087Sjp161948 52*5087Sjp161948 VA_COPY(ap2, ap); 53*5087Sjp161948 if ((string = malloc(INIT_SZ)) == NULL) 54*5087Sjp161948 goto fail; 55*5087Sjp161948 56*5087Sjp161948 ret = vsnprintf(string, INIT_SZ, fmt, ap2); 57*5087Sjp161948 if (ret >= 0 && ret < INIT_SZ) { /* succeeded with initial alloc */ 58*5087Sjp161948 *str = string; 59*5087Sjp161948 } else if (ret == INT_MAX || ret < 0) { /* Bad length */ 60*5087Sjp161948 free(string); 61*5087Sjp161948 goto fail; 62*5087Sjp161948 } else { /* bigger than initial, realloc allowing for nul */ 63*5087Sjp161948 len = (size_t)ret + 1; 64*5087Sjp161948 if ((newstr = realloc(string, len)) == NULL) { 65*5087Sjp161948 free(string); 66*5087Sjp161948 goto fail; 67*5087Sjp161948 } else { 68*5087Sjp161948 va_end(ap2); 69*5087Sjp161948 VA_COPY(ap2, ap); 70*5087Sjp161948 ret = vsnprintf(newstr, len, fmt, ap2); 71*5087Sjp161948 if (ret >= 0 && (size_t)ret < len) { 72*5087Sjp161948 *str = newstr; 73*5087Sjp161948 } else { /* failed with realloc'ed string, give up */ 74*5087Sjp161948 free(newstr); 75*5087Sjp161948 goto fail; 76*5087Sjp161948 } 77*5087Sjp161948 } 78*5087Sjp161948 } 79*5087Sjp161948 va_end(ap2); 80*5087Sjp161948 return (ret); 81*5087Sjp161948 82*5087Sjp161948 fail: 83*5087Sjp161948 *str = NULL; 84*5087Sjp161948 errno = ENOMEM; 85*5087Sjp161948 va_end(ap2); 86*5087Sjp161948 return (-1); 87*5087Sjp161948 } 88*5087Sjp161948 #endif 89*5087Sjp161948 90*5087Sjp161948 #ifndef HAVE_ASPRINTF 91*5087Sjp161948 int 92*5087Sjp161948 asprintf(char **str, const char *fmt, ...) 93*5087Sjp161948 { 94*5087Sjp161948 va_list ap; 95*5087Sjp161948 int ret; 96*5087Sjp161948 97*5087Sjp161948 *str = NULL; 98*5087Sjp161948 va_start(ap, fmt); 99*5087Sjp161948 ret = vasprintf(str, fmt, ap); 100*5087Sjp161948 va_end(ap); 101*5087Sjp161948 102*5087Sjp161948 return (ret); 103*5087Sjp161948 } 104*5087Sjp161948 #endif 105