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1 /*
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2 * This file is part of FFmpeg.
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3 *
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4 * FFmpeg is free software; you can redistribute it and/or
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5 * modify it under the terms of the GNU Lesser General Public
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6 * License as published by the Free Software Foundation; either
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7 * version 2.1 of the License, or (at your option) any later version.
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8 *
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9 * FFmpeg is distributed in the hope that it will be useful,
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 * Lesser General Public License for more details.
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13 *
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14 * You should have received a copy of the GNU Lesser General Public
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15 * License along with FFmpeg; if not, write to the Free Software
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16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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17 */
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18
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19 /**
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20 * @file
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21 * error code definitions
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22 */
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23
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24 #ifndef AVUTIL_ERROR_H
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25 #define AVUTIL_ERROR_H
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26
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27 #include <errno.h>
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28 #include "common.h"
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29
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30 /* error handling */
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31 #if EDOM > 0
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32 #define AVERROR(e) (-(e)) ///< Returns a negative error code from a POSIX error code, to return from library functions.
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33 #define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value.
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34 #else
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35 /* Some platforms have E* and errno already negated. */
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36 #define AVERROR(e) (e)
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37 #define AVUNERROR(e) (e)
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38 #endif
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39
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40 #define AVERROR_EOF AVERROR(EPIPE) ///< End of file
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41
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42
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43 /**
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44 * Puts a description of the AVERROR code errnum in errbuf.
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45 * In case of failure the global variable errno is set to indicate the
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46 * error.
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47 *
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48 * @param errbuf_size the size in bytes of errbuf
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49 * @return 0 on success, a negative value otherwise
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50 */
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51 int av_strerror(int errnum, char *errbuf, size_t errbuf_size);
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52
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53 #endif /* AVUTIL_ERROR_H */
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