2 * Various utilities for command line tools
3 * Copyright (c) 2000-2003 Fabrice Bellard
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 void show_help_options(const OptionDef *options)
33 printf("Main options are:\n");
36 for(po = options; po->name != NULL; po++) {
38 expert = (po->flags & OPT_EXPERT) != 0;
40 if (expert && first) {
41 printf("\nAdvanced options are:\n");
44 strcpy(buf, po->name);
45 if (po->flags & HAS_ARG) {
47 strcat(buf, po->argname);
49 printf("-%-17s %s\n", buf, po->help);
55 void parse_options(int argc, char **argv, const OptionDef *options)
57 const char *opt, *arg;
63 while (optindex < argc) {
64 opt = argv[optindex++];
66 if (opt[0] == '-' && opt[1] != '\0') {
68 while (po->name != NULL) {
69 if (!strcmp(opt + 1, po->name))
74 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
78 if (po->flags & HAS_ARG) {
79 arg = argv[optindex++];
81 fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
85 if (po->flags & OPT_STRING) {
89 } else if (po->flags & OPT_BOOL) {
100 void print_error(const char *filename, int err)
103 case AVERROR_NUMEXPECTED:
104 fprintf(stderr, "%s: Incorrect image filename syntax.\n"
105 "Use '%%d' to specify the image number:\n"
106 " for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
107 " for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
110 case AVERROR_INVALIDDATA:
111 fprintf(stderr, "%s: Error while parsing header\n", filename);
114 fprintf(stderr, "%s: Unknown format\n", filename);
117 fprintf(stderr, "%s: Error while opening file\n", filename);