Standard Libraries for EDK II.

[mirror_edk2.git] / StdLib / LibC / Stdio / vasprintf.c

/*  $NetBSD: vasprintf.c,v 1.10 2005/02/09 21:35:47 kleink Exp $  */\r
\r
/*\r
 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>\r
 * All rights reserved.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * 3. The name of the author may not be used to endorse or promote products\r
 *    derived from this software without specific prior written permission.\r
 *\r
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,\r
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY\r
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL\r
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,\r
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,\r
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;\r
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,\r
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR\r
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF\r
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
 */\r
#include  <LibConfig.h>\r
#include <sys/EfiCdefs.h>\r
#if defined(LIBC_SCCS) && !defined(lint)\r
__RCSID("$NetBSD: vasprintf.c,v 1.10 2005/02/09 21:35:47 kleink Exp $");\r
#endif /* LIBC_SCCS and not lint */\r
\r
#include <assert.h>\r
#include <errno.h>\r
#include <stdio.h>\r
#include <stdlib.h>\r
#include "reentrant.h"\r
#include "local.h"\r
\r
int\r
vasprintf(str, fmt, ap)\r
  char **str;\r
  const char *fmt;\r
  _BSD_VA_LIST_ ap;\r
{\r
  int ret;\r
  FILE f;\r
  struct __sfileext fext;\r
  unsigned char *_base;\r
\r
  _DIAGASSERT(str != NULL);\r
  _DIAGASSERT(fmt != NULL);\r
\r
  _FILEEXT_SETUP(&f, &fext);\r
  f._file = -1;\r
  f._flags = __SWR | __SSTR | __SALC;\r
  f._bf._base = f._p = (unsigned char *)malloc(128);\r
  if (f._bf._base == NULL)\r
    goto err;\r
  f._bf._size = f._w = 127;   /* Leave room for the NUL */\r
  ret = __vfprintf_unlocked(&f, fmt, ap);\r
  if (ret == -1)\r
    goto err;\r
  *f._p = '\0';\r
  _base = realloc(f._bf._base, (size_t)(ret + 1));\r
  if (_base == NULL)\r
    goto err;\r
  *str = (char *)_base;\r
  return (ret);\r
\r
err:\r
  if (f._bf._base)\r
    free(f._bf._base);\r
  *str = NULL;\r
  errno = ENOMEM;\r
  return (-1);\r
}\r