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ffmpeg / libavutil / error.c @ 2d2b5a14

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/*
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "avutil.h"
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#include "avstring.h"
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int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
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{
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    int ret = 0;
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    const char *errstr = NULL;
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    switch (errnum) {
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    case AVERROR_EOF:               errstr = "End of file"; break;
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    case AVERROR_INVALIDDATA:       errstr = "Invalid data found when processing input"; break;
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    case AVERROR_NUMEXPECTED:       errstr = "Number syntax expected in filename"; break;
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    case AVERROR_PATCHWELCOME:      errstr = "Not yet implemented in FFmpeg, patches welcome"; break;
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    case AVERROR_DEMUXER_NOT_FOUND: errstr = "Demuxer not found"; break;
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    case AVERROR_MUXER_NOT_FOUND:   errstr = "Muxer not found"; break;
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    case AVERROR_DECODER_NOT_FOUND: errstr = "Decoder not found"; break;
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    case AVERROR_ENCODER_NOT_FOUND: errstr = "Encoder not found"; break;
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    case AVERROR_PROTOCOL_NOT_FOUND:errstr = "Protocol not found"; break;
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    case AVERROR_FILTER_NOT_FOUND:  errstr = "Filter not found"; break;
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    case AVERROR_BSF_NOT_FOUND:     errstr = "Bitstream filter not found"; break;
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    case AVERROR_STREAM_NOT_FOUND:  errstr = "Stream not found"; break;
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    case AVERROR_EXIT:              errstr = "Immediate exit requested"; break;
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    }
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    if (errstr) {
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        av_strlcpy(errbuf, errstr, errbuf_size);
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    } else {
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#if HAVE_STRERROR_R
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        ret = strerror_r(AVUNERROR(errnum), errbuf, errbuf_size);
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#else
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        ret = -1;
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#endif
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        if (ret < 0)
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            snprintf(errbuf, errbuf_size, "Error number %d occurred", errnum);
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    }
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    return ret;
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}