Add support for files that begin with a dash.
[libav.git] / 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 #define HAVE_AV_CONFIG_H
22 #include "avformat.h"
23 #include "common.h"
24
25 #include "cmdutils.h"
26
27 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
28 {
29 const OptionDef *po;
30 int first;
31
32 first = 1;
33 for(po = options; po->name != NULL; po++) {
34 char buf[64];
35 if ((po->flags & mask) == value) {
36 if (first) {
37 printf("%s", msg);
38 first = 0;
39 }
40 pstrcpy(buf, sizeof(buf), po->name);
41 if (po->flags & HAS_ARG) {
42 pstrcat(buf, sizeof(buf), " ");
43 pstrcat(buf, sizeof(buf), po->argname);
44 }
45 printf("-%-17s %s\n", buf, po->help);
46 }
47 }
48 }
49
50 static const OptionDef* find_option(const OptionDef *po, const char *name){
51 while (po->name != NULL) {
52 if (!strcmp(name, po->name))
53 break;
54 po++;
55 }
56 return po;
57 }
58
59 void parse_options(int argc, char **argv, const OptionDef *options)
60 {
61 const char *opt, *arg;
62 int optindex, handleoptions;
63 const OptionDef *po;
64
65 /* parse options */
66 optindex = 1;
67 while (optindex < argc) {
68 opt = argv[optindex++];
69
70 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
71 if (opt[1] == '-' && opt[2] == '\0') {
72 handleoptions = 0;
73 continue;
74 }
75 po= find_option(options, opt + 1);
76 if (!po->name)
77 po= find_option(options, "default");
78 if (!po->name) {
79 unknown_opt:
80 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
81 exit(1);
82 }
83 arg = NULL;
84 if (po->flags & HAS_ARG) {
85 arg = argv[optindex++];
86 if (!arg) {
87 fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
88 exit(1);
89 }
90 }
91 if (po->flags & OPT_STRING) {
92 char *str;
93 str = av_strdup(arg);
94 *po->u.str_arg = str;
95 } else if (po->flags & OPT_BOOL) {
96 *po->u.int_arg = 1;
97 } else if (po->flags & OPT_INT) {
98 *po->u.int_arg = atoi(arg);
99 } else if (po->flags & OPT_FLOAT) {
100 *po->u.float_arg = atof(arg);
101 } else if (po->flags & OPT_FUNC2) {
102 if(po->u.func2_arg(opt+1, arg)<0)
103 goto unknown_opt;
104 } else {
105 po->u.func_arg(arg);
106 }
107 } else {
108 parse_arg_file(opt);
109 }
110 }
111 }
112
113 void print_error(const char *filename, int err)
114 {
115 switch(err) {
116 case AVERROR_NUMEXPECTED:
117 fprintf(stderr, "%s: Incorrect image filename syntax.\n"
118 "Use '%%d' to specify the image number:\n"
119 " for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
120 " for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
121 filename);
122 break;
123 case AVERROR_INVALIDDATA:
124 fprintf(stderr, "%s: Error while parsing header\n", filename);
125 break;
126 case AVERROR_NOFMT:
127 fprintf(stderr, "%s: Unknown format\n", filename);
128 break;
129 case AVERROR_IO:
130 fprintf(stderr, "%s: I/O error occured\n"
131 "Usually that means that input file is truncated and/or corrupted.\n",
132 filename);
133 break;
134 case AVERROR_NOMEM:
135 fprintf(stderr, "%s: memory allocation error occured\n", filename);
136 break;
137 default:
138 fprintf(stderr, "%s: Error while opening file\n", filename);
139 break;
140 }
141 }