common/xasprintf.c

   1 /* xasprintf.c
   2  *      Copyright (C) 2003, 2005 Free Software Foundation, Inc.
   3  *
   4  * This file is part of GnuPG.
   5  *
   6  * GnuPG is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GnuPG is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  19  */
  20
  21 #include <config.h>
  22 #include <stdlib.h>
  23 #include <errno.h>
  24
  25 #include "util.h"
  26 #include "iobuf.h"
  27
  28 /* Same as asprintf but return an allocated buffer suitable to be
  29    freed using xfree.  This function simply dies on memory failure,
  30    thus no extra check is required. */
  31 char *
  32 xasprintf (const char *fmt, ...)
  33 {
  34   va_list ap;
  35   char *buf, *p;
  36
  37   va_start (ap, fmt);
  38   if (vasprintf (&buf, fmt, ap) < 0)
  39     log_fatal ("asprintf failed: %s\n", strerror (errno));
  40   va_end (ap);
  41   p = xstrdup (buf);
  42   free (buf);
  43   return p;
  44 }
  45
  46 /* Same as above but return NULL on memory failure.  */
  47 char *
  48 xtryasprintf (const char *fmt, ...)
  49 {
  50   int rc;
  51   va_list ap;
  52   char *buf, *p;
  53
  54   va_start (ap, fmt);
  55   rc = vasprintf (&buf, fmt, ap);
  56   va_end (ap);
  57   if (rc < 0)
  58     return NULL;
  59   p = xtrystrdup (buf);
  60   free (buf);
  61   return p;
  62 }