libavutil/error.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include "avutil.h"
  20 #include "avstring.h"
  21
  22 int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
  23 {
  24     int ret = 0;
  25     const char *errstr = NULL;
  26
  27     switch (errnum) {
  28     case AVERROR_EOF:               errstr = "End of file"; break;
  29     case AVERROR_INVALIDDATA:       errstr = "Invalid data found when processing input"; break;
  30     case AVERROR_NOTSUPP:           errstr = "Operation not supported"; break;
  31     case AVERROR_NUMEXPECTED:       errstr = "Number syntax expected in filename"; break;
  32     case AVERROR_PATCHWELCOME:      errstr = "Not yet implemented in FFmpeg, patches welcome"; break;
  33     }
  34
  35     if (errstr) {
  36         av_strlcpy(errbuf, errstr, errbuf_size);
  37     } else {
  38 #if HAVE_STRERROR_R
  39         ret = strerror_r(AVUNERROR(errnum), errbuf, errbuf_size);
  40 #else
  41         snprintf(errbuf, errbuf_size, "Error number %d occurred", errnum);
  42 #endif
  43     }
  44
  45     return ret;
  46 }