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 #undef _GNU_SOURCE
  20 #define _XOPEN_SOURCE 600 /* XSI-compliant version of strerror_r */
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include "config.h"
  24 #include "avstring.h"
  25 #include "error.h"
  26 #include "macros.h"
  27
  28 struct error_entry {
  29     int num;
  30     const char *tag;
  31     const char *str;
  32 };
  33
  34 #define ERROR_TAG(tag) AVERROR_##tag, #tag
  35 #define EERROR_TAG(tag) AVERROR(tag), #tag
  36 #define AVERROR_INPUT_AND_OUTPUT_CHANGED (AVERROR_INPUT_CHANGED | AVERROR_OUTPUT_CHANGED)
  37 static const struct error_entry error_entries[] = {
  38     { ERROR_TAG(BSF_NOT_FOUND),      "Bitstream filter not found"                     },
  39     { ERROR_TAG(BUG),                "Internal bug, should not have happened"         },
  40     { ERROR_TAG(BUG2),               "Internal bug, should not have happened"         },
  41     { ERROR_TAG(BUFFER_TOO_SMALL),   "Buffer too small"                               },
  42     { ERROR_TAG(DECODER_NOT_FOUND),  "Decoder not found"                              },
  43     { ERROR_TAG(DEMUXER_NOT_FOUND),  "Demuxer not found"                              },
  44     { ERROR_TAG(ENCODER_NOT_FOUND),  "Encoder not found"                              },
  45     { ERROR_TAG(EOF),                "End of file"                                    },
  46     { ERROR_TAG(EXIT),               "Immediate exit requested"                       },
  47     { ERROR_TAG(EXTERNAL),           "Generic error in an external library"           },
  48     { ERROR_TAG(FILTER_NOT_FOUND),   "Filter not found"                               },
  49     { ERROR_TAG(INPUT_CHANGED),      "Input changed"                                  },
  50     { ERROR_TAG(INVALIDDATA),        "Invalid data found when processing input"       },
  51     { ERROR_TAG(MUXER_NOT_FOUND),    "Muxer not found"                                },
  52     { ERROR_TAG(OPTION_NOT_FOUND),   "Option not found"                               },
  53     { ERROR_TAG(OUTPUT_CHANGED),     "Output changed"                                 },
  54     { ERROR_TAG(PATCHWELCOME),       "Not yet implemented in FFmpeg, patches welcome" },
  55     { ERROR_TAG(PROTOCOL_NOT_FOUND), "Protocol not found"                             },
  56     { ERROR_TAG(STREAM_NOT_FOUND),   "Stream not found"                               },
  57     { ERROR_TAG(UNKNOWN),            "Unknown error occurred"                         },
  58     { ERROR_TAG(EXPERIMENTAL),       "Experimental feature"                           },
  59     { ERROR_TAG(INPUT_AND_OUTPUT_CHANGED), "Input and output changed"                 },
  60     { ERROR_TAG(HTTP_BAD_REQUEST),   "Server returned 400 Bad Request"         },
  61     { ERROR_TAG(HTTP_UNAUTHORIZED),  "Server returned 401 Unauthorized (authorization failed)" },
  62     { ERROR_TAG(HTTP_FORBIDDEN),     "Server returned 403 Forbidden (access denied)" },
  63     { ERROR_TAG(HTTP_NOT_FOUND),     "Server returned 404 Not Found"           },
  64     { ERROR_TAG(HTTP_OTHER_4XX),     "Server returned 4XX Client Error, but not one of 40{0,1,3,4}" },
  65     { ERROR_TAG(HTTP_SERVER_ERROR),  "Server returned 5XX Server Error reply" },
  66 #if !HAVE_STRERROR_R
  67     { EERROR_TAG(E2BIG),             "Argument list too long" },
  68     { EERROR_TAG(EACCES),            "Permission denied" },
  69     { EERROR_TAG(EAGAIN),            "Resource temporarily unavailable" },
  70     { EERROR_TAG(EBADF),             "Bad file descriptor" },
  71     { EERROR_TAG(EBUSY),             "Device or resource busy" },
  72     { EERROR_TAG(ECHILD),            "No child processes" },
  73     { EERROR_TAG(EDEADLK),           "Resource deadlock avoided" },
  74     { EERROR_TAG(EDOM),              "Numerical argument out of domain" },
  75     { EERROR_TAG(EEXIST),            "File exists" },
  76     { EERROR_TAG(EFAULT),            "Bad address" },
  77     { EERROR_TAG(EFBIG),             "File too large" },
  78     { EERROR_TAG(EILSEQ),            "Illegal byte sequence" },
  79     { EERROR_TAG(EINTR),             "Interrupted system call" },
  80     { EERROR_TAG(EINVAL),            "Invalid argument" },
  81     { EERROR_TAG(EIO),               "I/O error" },
  82     { EERROR_TAG(EISDIR),            "Is a directory" },
  83     { EERROR_TAG(EMFILE),            "Too many open files" },
  84     { EERROR_TAG(EMLINK),            "Too many links" },
  85     { EERROR_TAG(ENAMETOOLONG),      "File name too long" },
  86     { EERROR_TAG(ENFILE),            "Too many open files in system" },
  87     { EERROR_TAG(ENODEV),            "No such device" },
  88     { EERROR_TAG(ENOENT),            "No such file or directory" },
  89     { EERROR_TAG(ENOEXEC),           "Exec format error" },
  90     { EERROR_TAG(ENOLCK),            "No locks available" },
  91     { EERROR_TAG(ENOMEM),            "Cannot allocate memory" },
  92     { EERROR_TAG(ENOSPC),            "No space left on device" },
  93     { EERROR_TAG(ENOSYS),            "Function not implemented" },
  94     { EERROR_TAG(ENOTDIR),           "Not a directory" },
  95     { EERROR_TAG(ENOTEMPTY),         "Directory not empty" },
  96     { EERROR_TAG(ENOTTY),            "Inappropriate I/O control operation" },
  97     { EERROR_TAG(ENXIO),             "No such device or address" },
  98     { EERROR_TAG(EPERM),             "Operation not permitted" },
  99     { EERROR_TAG(EPIPE),             "Broken pipe" },
 100     { EERROR_TAG(ERANGE),            "Result too large" },
 101     { EERROR_TAG(EROFS),             "Read-only file system" },
 102     { EERROR_TAG(ESPIPE),            "Illegal seek" },
 103     { EERROR_TAG(ESRCH),             "No such process" },
 104     { EERROR_TAG(EXDEV),             "Cross-device link" },
 105 #endif
 106 };
 107
 108 int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
 109 {
 110     int ret = 0, i;
 111     const struct error_entry *entry = NULL;
 112
 113     for (i = 0; i < FF_ARRAY_ELEMS(error_entries); i++) {
 114         if (errnum == error_entries[i].num) {
 115             entry = &error_entries[i];
 116             break;
 117         }
 118     }
 119     if (entry) {
 120         av_strlcpy(errbuf, entry->str, errbuf_size);
 121     } else {
 122 #if HAVE_STRERROR_R
 123         ret = AVERROR(strerror_r(AVUNERROR(errnum), errbuf, errbuf_size));
 124 #else
 125         ret = -1;
 126 #endif
 127         if (ret < 0)
 128             snprintf(errbuf, errbuf_size, "Error number %d occurred", errnum);
 129     }
 130
 131     return ret;
 132 }