manual/examples/memstrm.c

   1 /* open_memstream example.
   2    Copyright (C) 1991-2024 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU General Public License
   6    as published by the Free Software Foundation; either version 2
   7    of the License, or (at your option) any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <https://www.gnu.org/licenses/>.
  16 */
  17
  18 #include <stdio.h>
  19
  20 int
  21 main (void)
  22 {
  23   char *bp;
  24   size_t size;
  25   FILE *stream;
  26
  27   stream = open_memstream (&bp, &size);
  28   fprintf (stream, "hello");
  29   fflush (stream);
  30   printf ("buf = `%s', size = %zu\n", bp, size);
  31   fprintf (stream, ", world");
  32   fclose (stream);
  33   printf ("buf = `%s', size = %zu\n", bp, size);
  34
  35   return 0;
  36 }