lib/vasprintf.c

   1 /* quvi
   2  * Copyright (C) 2009,2010  Toni Gundogdu <legatvs@gmail.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17  * 02110-1301  USA
  18  */
  19
  20 #include <stdio.h>
  21 #include <stdarg.h>
  22 #include <stdlib.h>
  23
  24 int vasprintf(char **dst, const char *fmt, va_list ap)
  25 {
  26   va_list apc;
  27   int len;
  28   char *p;
  29
  30   va_copy(apc, ap);
  31   len = vsnprintf(0, 0, fmt, apc) + 1;
  32   va_end(apc);
  33
  34   *dst = p = malloc(len);
  35   if (!p)
  36     return (-1);
  37
  38   return (vsnprintf(p, len, fmt, ap));
  39 }
  40
  41 /* vim: set ts=2 sw=2 tw=72 expandtab: */