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 3 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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <stdlib.h>
  22 #include <errno.h>
  23
  24 #include "util.h"
  25 #include "iobuf.h"
  26 #include "estream-printf.h"
  27
  28 #if !defined(_ESTREAM_PRINTF_MALLOC) || !defined(_ESTREAM_PRINTF_FREE)
  29 #error Need to define ESTREAM_PRINTF_MALLOC and _FREE
  30 #endif
  31
  32 /* Same as asprintf but return an allocated buffer suitable to be
  33    freed using xfree.  This function simply dies on memory failure,
  34    thus no extra check is required. */
  35 char *
  36 xasprintf (const char *fmt, ...)
  37 {
  38   va_list ap;
  39   char *buf;
  40
  41   va_start (ap, fmt);
  42   if (estream_vasprintf (&buf, fmt, ap) < 0)
  43     log_fatal ("estream_asprintf failed: %s\n", strerror (errno));
  44   va_end (ap);
  45   return buf;
  46 }
  47
  48 /* Same as above but return NULL on memory failure.  */
  49 char *
  50 xtryasprintf (const char *fmt, ...)
  51 {
  52   int rc;
  53   va_list ap;
  54   char *buf;
  55
  56   va_start (ap, fmt);
  57   rc = estream_vasprintf (&buf, fmt, ap);
  58   va_end (ap);
  59   if (rc < 0)
  60     return NULL;
  61   return buf;
  62 }