/* $OpenBSD: asprintf.c,v 1.4 1998/06/21 22:13:46 millert Exp $ */ /* * Copyright (c) 1997 Todd C. Miller * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include "local.h" int asprintf(char **str, char const *fmt, ...) { int ret; va_list ap; FILE f; struct __sFILEX ext; va_start(ap, fmt); f._file = -1; f._flags = __SWR | __SSTR | __SALC; f._bf._base = f._p = (unsigned char *)malloc(128); if (f._bf._base == NULL) { *str = NULL; errno = ENOMEM; return (-1); } f._bf._size = f._w = 127; /* Leave room for the NULL */ f._extra = &ext; INITEXTRA(&f); ret = __vfprintf(&f, fmt, ap); /* Use unlocked __vfprintf */ *f._p = '\0'; va_end(ap); f._bf._base = reallocf(f._bf._base, f._bf._size + 1); if (f._bf._base == NULL) { errno = ENOMEM; ret = -1; } *str = (char *)f._bf._base; return (ret); }