text: /*	$NetBSD: asprintf.c,v 1.14 2005/02/09 21:35:47 kleink Exp $	*/
  
  /*
   * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
   * 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.
   */
  
  #if defined(LIBC_SCCS) && !defined(lint)
  __RCSID("$NetBSD: asprintf.c,v 1.14 2005/02/09 21:35:47 kleink Exp $");
  #endif /* LIBC_SCCS and not lint */
  
  
  #include "reentrant.h"
  #include "local.h"
  
  int
  asprintf(char **str, char const *fmt, ...)
  {
  	int ret;
  	va_list ap;
  	FILE f;
  	struct __sfileext fext;
  	unsigned char *_base;
  
  	assert(str != NULL);
  
  	_FILEEXT_SETUP(&f, &fext);
  	f._file = -1;
  	f._flags = __SWR | __SSTR | __SALC;
  	f._bf._base = f._p = malloc((size_t)128);
  	if (f._bf._base == NULL)
  		goto err;
  	f._bf._size = f._w = 127;		/* Leave room for the NUL */
  	va_start(ap, fmt);
  	ret = __vfprintf_unlocked(&f, fmt, ap);
  	va_end(ap);
  	if (ret < 0)
  		goto err;
  	*f._p = '\0';
  	_base = realloc(f._bf._base, (size_t)ret + 1);
  	if (_base == NULL)
  		goto err;
  	*str = (char *)_base;
  	return (ret);
  
  err:
  	if (f._bf._base)
  		free(f._bf._base);
  	*str = NULL;
  	errno = ENOMEM;
  	return (-1);
  }
  