cmdutils.c

   1 /*
   2  * Various utilities for command line tools
   3  * Copyright (c) 2000-2003 Fabrice Bellard
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "avformat.h"
  23 #include "cmdutils.h"
  24 #include "avstring.h"
  25
  26 #undef exit
  27
  28 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
  29 {
  30     const OptionDef *po;
  31     int first;
  32
  33     first = 1;
  34     for(po = options; po->name != NULL; po++) {
  35         char buf[64];
  36         if ((po->flags & mask) == value) {
  37             if (first) {
  38                 printf("%s", msg);
  39                 first = 0;
  40             }
  41             av_strlcpy(buf, po->name, sizeof(buf));
  42             if (po->flags & HAS_ARG) {
  43                 av_strlcat(buf, " ", sizeof(buf));
  44                 av_strlcat(buf, po->argname, sizeof(buf));
  45             }
  46             printf("-%-17s  %s\n", buf, po->help);
  47         }
  48     }
  49 }
  50
  51 static const OptionDef* find_option(const OptionDef *po, const char *name){
  52     while (po->name != NULL) {
  53         if (!strcmp(name, po->name))
  54             break;
  55         po++;
  56     }
  57     return po;
  58 }
  59
  60 void parse_options(int argc, char **argv, const OptionDef *options)
  61 {
  62     const char *opt, *arg;
  63     int optindex, handleoptions=1;
  64     const OptionDef *po;
  65
  66     /* parse options */
  67     optindex = 1;
  68     while (optindex < argc) {
  69         opt = argv[optindex++];
  70
  71         if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
  72           if (opt[1] == '-' && opt[2] == '\0') {
  73             handleoptions = 0;
  74             continue;
  75           }
  76             po= find_option(options, opt + 1);
  77             if (!po->name)
  78                 po= find_option(options, "default");
  79             if (!po->name) {
  80 unknown_opt:
  81                 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
  82                 exit(1);
  83             }
  84             arg = NULL;
  85             if (po->flags & HAS_ARG) {
  86                 arg = argv[optindex++];
  87                 if (!arg) {
  88                     fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
  89                     exit(1);
  90                 }
  91             }
  92             if (po->flags & OPT_STRING) {
  93                 char *str;
  94                 str = av_strdup(arg);
  95                 *po->u.str_arg = str;
  96             } else if (po->flags & OPT_BOOL) {
  97                 *po->u.int_arg = 1;
  98             } else if (po->flags & OPT_INT) {
  99                 *po->u.int_arg = atoi(arg);
 100             } else if (po->flags & OPT_INT64) {
 101                 *po->u.int64_arg = strtoll(arg, (char **)NULL, 10);
 102             } else if (po->flags & OPT_FLOAT) {
 103                 *po->u.float_arg = atof(arg);
 104             } else if (po->flags & OPT_FUNC2) {
 105                 if(po->u.func2_arg(opt+1, arg)<0)
 106                     goto unknown_opt;
 107             } else {
 108                 po->u.func_arg(arg);
 109             }
 110         } else {
 111             parse_arg_file(opt);
 112         }
 113     }
 114 }
 115
 116 void print_error(const char *filename, int err)
 117 {
 118     switch(err) {
 119     case AVERROR_NUMEXPECTED:
 120         fprintf(stderr, "%s: Incorrect image filename syntax.\n"
 121                 "Use '%%d' to specify the image number:\n"
 122                 "  for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
 123                 "  for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
 124                 filename);
 125         break;
 126     case AVERROR_INVALIDDATA:
 127         fprintf(stderr, "%s: Error while parsing header\n", filename);
 128         break;
 129     case AVERROR_NOFMT:
 130         fprintf(stderr, "%s: Unknown format\n", filename);
 131         break;
 132     case AVERROR_IO:
 133         fprintf(stderr, "%s: I/O error occured\n"
 134                 "Usually that means that input file is truncated and/or corrupted.\n",
 135                 filename);
 136         break;
 137     case AVERROR_NOMEM:
 138         fprintf(stderr, "%s: memory allocation error occured\n", filename);
 139         break;
 140     case AVERROR_NOENT:
 141         fprintf(stderr, "%s: no such file or directory\n", filename);
 142         break;
 143     default:
 144         fprintf(stderr, "%s: Error while opening file\n", filename);
 145         break;
 146     }
 147 }