13383decaSTim J. Robbins /* $OpenBSD: vasprintf.c,v 1.6 1998/10/16 16:11:56 millert Exp $ */ 264a965e7SPeter Wemm 364a965e7SPeter Wemm /* 464a965e7SPeter Wemm * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> 564a965e7SPeter Wemm * All rights reserved. 615aa00d5SPeter Wemm * 715aa00d5SPeter Wemm * Redistribution and use in source and binary forms, with or without 815aa00d5SPeter Wemm * modification, are permitted provided that the following conditions 915aa00d5SPeter Wemm * are met: 1015aa00d5SPeter Wemm * 1. Redistributions of source code must retain the above copyright 1115aa00d5SPeter Wemm * notice, this list of conditions and the following disclaimer. 1215aa00d5SPeter Wemm * 2. Redistributions in binary form must reproduce the above copyright 1315aa00d5SPeter Wemm * notice, this list of conditions and the following disclaimer in the 1415aa00d5SPeter Wemm * documentation and/or other materials provided with the distribution. 1564a965e7SPeter Wemm * 3. The name of the author may not be used to endorse or promote products 1664a965e7SPeter Wemm * derived from this software without specific prior written permission. 1715aa00d5SPeter Wemm * 1864a965e7SPeter Wemm * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 1964a965e7SPeter Wemm * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 2064a965e7SPeter Wemm * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 2164a965e7SPeter Wemm * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2264a965e7SPeter Wemm * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2364a965e7SPeter Wemm * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 2464a965e7SPeter Wemm * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 2564a965e7SPeter Wemm * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 2664a965e7SPeter Wemm * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 2764a965e7SPeter Wemm * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2815aa00d5SPeter Wemm */ 2915aa00d5SPeter Wemm 30333fc21eSDavid E. O'Brien #include <sys/cdefs.h> 31333fc21eSDavid E. O'Brien __FBSDID("$FreeBSD$"); 3215aa00d5SPeter Wemm 3315aa00d5SPeter Wemm #include <stdio.h> 3415aa00d5SPeter Wemm #include <stdlib.h> 3564a965e7SPeter Wemm #include <errno.h> 36d201fe46SDaniel Eischen #include "local.h" 3715aa00d5SPeter Wemm 3815aa00d5SPeter Wemm int 3915aa00d5SPeter Wemm vasprintf(str, fmt, ap) 4015aa00d5SPeter Wemm char **str; 4115aa00d5SPeter Wemm const char *fmt; 42abbd8902SMike Barcroft __va_list ap; 4315aa00d5SPeter Wemm { 4415aa00d5SPeter Wemm int ret; 4564a965e7SPeter Wemm FILE f; 46e74101e4STim J. Robbins struct __sFILEX ext; 473383decaSTim J. Robbins unsigned char *_base; 4815aa00d5SPeter Wemm 4964a965e7SPeter Wemm f._file = -1; 5064a965e7SPeter Wemm f._flags = __SWR | __SSTR | __SALC; 5164a965e7SPeter Wemm f._bf._base = f._p = (unsigned char *)malloc(128); 523383decaSTim J. Robbins if (f._bf._base == NULL) 533383decaSTim J. Robbins goto err; 546879bea8SJuli Mallett f._bf._size = f._w = 127; /* Leave room for the NUL */ 55e74101e4STim J. Robbins f._extra = &ext; 56e74101e4STim J. Robbins INITEXTRA(&f); 57d201fe46SDaniel Eischen ret = __vfprintf(&f, fmt, ap); 583383decaSTim J. Robbins if (ret == -1) 593383decaSTim J. Robbins goto err; 6064a965e7SPeter Wemm *f._p = '\0'; 613383decaSTim J. Robbins _base = realloc(f._bf._base, ret + 1); 623383decaSTim J. Robbins if (_base == NULL) 633383decaSTim J. Robbins goto err; 643383decaSTim J. Robbins *str = (char *)_base; 6515aa00d5SPeter Wemm return (ret); 663383decaSTim J. Robbins 673383decaSTim J. Robbins err: 683383decaSTim J. Robbins if (f._bf._base != NULL) { 693383decaSTim J. Robbins free(f._bf._base); 703383decaSTim J. Robbins f._bf._base = NULL; 713383decaSTim J. Robbins } 723383decaSTim J. Robbins *str = NULL; 733383decaSTim J. Robbins errno = ENOMEM; 743383decaSTim J. Robbins return (-1); 7515aa00d5SPeter Wemm } 76