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libavutil/error.c

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00001 /*
00002  * This file is part of FFmpeg.
00003  *
00004  * FFmpeg is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU Lesser General Public
00006  * License as published by the Free Software Foundation; either
00007  * version 2.1 of the License, or (at your option) any later version.
00008  *
00009  * FFmpeg is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * Lesser General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU Lesser General Public
00015  * License along with FFmpeg; if not, write to the Free Software
00016  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00017  */
00018 
00019 #undef _GNU_SOURCE
00020 #include "avutil.h"
00021 #include "avstring.h"
00022 
00023 int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
00024 {
00025     int ret = 0;
00026     const char *errstr = NULL;
00027 
00028     switch (errnum) {
00029     case AVERROR_EOF:               errstr = "End of file"; break;
00030     case AVERROR_INVALIDDATA:       errstr = "Invalid data found when processing input"; break;
00031     case AVERROR_NUMEXPECTED:       errstr = "Number syntax expected in filename"; break;
00032     case AVERROR_PATCHWELCOME:      errstr = "Not yet implemented in Libav, patches welcome"; break;
00033     case AVERROR_DEMUXER_NOT_FOUND: errstr = "Demuxer not found"; break;
00034     case AVERROR_MUXER_NOT_FOUND:   errstr = "Muxer not found"; break;
00035     case AVERROR_DECODER_NOT_FOUND: errstr = "Decoder not found"; break;
00036     case AVERROR_ENCODER_NOT_FOUND: errstr = "Encoder not found"; break;
00037     case AVERROR_OPTION_NOT_FOUND:  errstr = "Option not found"; break;
00038     case AVERROR_PROTOCOL_NOT_FOUND:errstr = "Protocol not found"; break;
00039     case AVERROR_FILTER_NOT_FOUND:  errstr = "Filter not found"; break;
00040     case AVERROR_BSF_NOT_FOUND:     errstr = "Bitstream filter not found"; break;
00041     case AVERROR_STREAM_NOT_FOUND:  errstr = "Stream not found"; break;
00042     case AVERROR_EXIT:              errstr = "Immediate exit requested"; break;
00043     }
00044 
00045     if (errstr) {
00046         av_strlcpy(errbuf, errstr, errbuf_size);
00047     } else {
00048 #if HAVE_STRERROR_R
00049         ret = strerror_r(AVUNERROR(errnum), errbuf, errbuf_size);
00050 #else
00051         ret = -1;
00052 #endif
00053         if (ret < 0)
00054             snprintf(errbuf, errbuf_size, "Error number %d occurred", errnum);
00055     }
00056 
00057     return ret;
00058 }

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