code.delx.au - pulseaudio/blob - src/tests/stripnul.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <inttypes.h>
  29
  30 #include <pulse/xmalloc.h>
  31 #include <pulsecore/macro.h>
  32
  33 int main(int argc, char *argv[]) {
  34     FILE *i, *o;
  35     size_t granularity;
  36     pa_bool_t found;
  37     uint8_t *zero;
  38
  39     pa_assert_se(argc >= 2);
  40     pa_assert_se((granularity = atoi(argv[1])) >= 1);
  41     pa_assert_se((i = (argc >= 3) ? fopen(argv[2], "r") : stdin));
  42     pa_assert_se((o = (argc >= 4) ? fopen(argv[3], "w") : stdout));
  43
  44     zero = pa_xmalloc0(granularity);
  45
  46     for (;;) {
  47         uint8_t buffer[16*1024], *p;
  48         size_t k;
  49
  50         k = fread(buffer, granularity, sizeof(buffer)/granularity, i);
  51
  52         if (k <= 0)
  53             break;
  54
  55         if (found)
  56             pa_assert_se(fwrite(buffer, granularity, k, o) == k);
  57         else {
  58             for (p = buffer; (p-buffer)/granularity < k; p += granularity)
  59                 if (memcmp(p, zero, granularity)) {
  60                     size_t left;
  61                     found = TRUE;
  62                     left = k - (p-buffer)/granularity;
  63                     pa_assert_se(fwrite(p, granularity, left, o) == left);
  64                     break;
  65                 }
  66         }
  67     }
  68
  69     fflush(o);
  70
  71     return 0;
  72 }