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  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. #undef _GNU_SOURCE
  20. #define _XOPEN_SOURCE 600 /* XSI-compliant version of strerror_r */
  21. #include "avutil.h"
  22. #include "avstring.h"
  23. #include "common.h"
  24.  
  25. struct error_entry {
  26.     int num;
  27.     const char *tag;
  28.     const char *str;
  29. };
  30.  
  31. #define ERROR_TAG(tag) AVERROR_##tag, #tag
  32. #define EERROR_TAG(tag) AVERROR(tag), #tag
  33. #define AVERROR_INPUT_AND_OUTPUT_CHANGED (AVERROR_INPUT_CHANGED | AVERROR_OUTPUT_CHANGED)
  34. static const struct error_entry error_entries[] = {
  35.     { ERROR_TAG(BSF_NOT_FOUND),      "Bitstream filter not found"                     },
  36.     { ERROR_TAG(BUG),                "Internal bug, should not have happened"         },
  37.     { ERROR_TAG(BUG2),               "Internal bug, should not have happened"         },
  38.     { ERROR_TAG(BUFFER_TOO_SMALL),   "Buffer too small"                               },
  39.     { ERROR_TAG(DECODER_NOT_FOUND),  "Decoder not found"                              },
  40.     { ERROR_TAG(DEMUXER_NOT_FOUND),  "Demuxer not found"                              },
  41.     { ERROR_TAG(ENCODER_NOT_FOUND),  "Encoder not found"                              },
  42.     { ERROR_TAG(EOF),                "End of file"                                    },
  43.     { ERROR_TAG(EXIT),               "Immediate exit requested"                       },
  44.     { ERROR_TAG(EXTERNAL),           "Generic error in an external library"           },
  45.     { ERROR_TAG(FILTER_NOT_FOUND),   "Filter not found"                               },
  46.     { ERROR_TAG(INPUT_CHANGED),      "Input changed"                                  },
  47.     { ERROR_TAG(INVALIDDATA),        "Invalid data found when processing input"       },
  48.     { ERROR_TAG(MUXER_NOT_FOUND),    "Muxer not found"                                },
  49.     { ERROR_TAG(OPTION_NOT_FOUND),   "Option not found"                               },
  50.     { ERROR_TAG(OUTPUT_CHANGED),     "Output changed"                                 },
  51.     { ERROR_TAG(PATCHWELCOME),       "Not yet implemented in FFmpeg, patches welcome" },
  52.     { ERROR_TAG(PROTOCOL_NOT_FOUND), "Protocol not found"                             },
  53.     { ERROR_TAG(STREAM_NOT_FOUND),   "Stream not found"                               },
  54.     { ERROR_TAG(UNKNOWN),            "Unknown error occurred"                         },
  55.     { ERROR_TAG(EXPERIMENTAL),       "Experimental feature"                           },
  56.     { ERROR_TAG(INPUT_AND_OUTPUT_CHANGED), "Input and output changed"                 },
  57.     { ERROR_TAG(HTTP_BAD_REQUEST),   "Server returned 400 Bad Request"         },
  58.     { ERROR_TAG(HTTP_UNAUTHORIZED),  "Server returned 401 Unauthorized (authorization failed)" },
  59.     { ERROR_TAG(HTTP_FORBIDDEN),     "Server returned 403 Forbidden (access denied)" },
  60.     { ERROR_TAG(HTTP_NOT_FOUND),     "Server returned 404 Not Found"           },
  61.     { ERROR_TAG(HTTP_OTHER_4XX),     "Server returned 4XX Client Error, but not one of 40{0,1,3,4}" },
  62.     { ERROR_TAG(HTTP_SERVER_ERROR),  "Server returned 5XX Server Error reply" },
  63. #if !HAVE_STRERROR_R
  64.     { EERROR_TAG(EINVAL),            "Invalid argument" },
  65. #endif
  66. };
  67.  
  68. int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
  69. {
  70.     int ret = 0, i;
  71.     const struct error_entry *entry = NULL;
  72.  
  73.     for (i = 0; i < FF_ARRAY_ELEMS(error_entries); i++) {
  74.         if (errnum == error_entries[i].num) {
  75.             entry = &error_entries[i];
  76.             break;
  77.         }
  78.     }
  79.     if (entry) {
  80.         av_strlcpy(errbuf, entry->str, errbuf_size);
  81.     } else {
  82. #if HAVE_STRERROR_R
  83.         ret = AVERROR(strerror_r(AVUNERROR(errnum), errbuf, errbuf_size));
  84. #else
  85.         ret = -1;
  86. #endif
  87.         if (ret < 0)
  88.             snprintf(errbuf, errbuf_size, "Error number %d occurred", errnum);
  89.     }
  90.  
  91.     return ret;
  92. }
  93.  
  94. #ifdef TEST
  95.  
  96. #undef printf
  97.  
  98. int main(void)
  99. {
  100.     int i;
  101.  
  102.     for (i = 0; i < FF_ARRAY_ELEMS(error_entries); i++) {
  103.         const struct error_entry *entry = &error_entries[i];
  104.         printf("%d: %s [%s]\n", entry->num, av_err2str(entry->num), entry->tag);
  105.     }
  106.  
  107.     for (i = 0; i < 256; i++) {
  108.         printf("%d: %s\n", -i, av_err2str(-i));
  109.     }
  110.  
  111.     return 0;
  112. }
  113.  
  114. #endif /* TEST */
  115.