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/*
* Various utilities for command line tools
* Copyright (c) 2000-2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "common.h"
#include "avformat.h"
#include "cmdutils.h"
void show_help_options(const OptionDef *options)
{
const OptionDef *po;
int i, expert, first;
printf("Main options are:\n");
for(i=0;i<2;i++) {
first = 1;
for(po = options; po->name != NULL; po++) {
char buf[64];
expert = (po->flags & OPT_EXPERT) != 0;
if (expert == i) {
if (expert && first) {
printf("\nAdvanced options are:\n");
first = 0;
}
strcpy(buf, po->name);
if (po->flags & HAS_ARG) {
strcat(buf, " ");
strcat(buf, po->argname);
}
printf("-%-17s %s\n", buf, po->help);
}
}
}
}
void parse_options(int argc, char **argv, const OptionDef *options)
{
const char *opt, *arg;
int optindex;
const OptionDef *po;
/* parse options */
optindex = 1;
while (optindex < argc) {
opt = argv[optindex++];
if (opt[0] == '-' && opt[1] != '\0') {
po = options;
while (po->name != NULL) {
if (!strcmp(opt + 1, po->name))
break;
po++;
}
if (!po->name) {
fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
exit(1);
}
arg = NULL;
if (po->flags & HAS_ARG) {
arg = argv[optindex++];
if (!arg) {
fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
exit(1);
}
}
if (po->flags & OPT_STRING) {
char *str;
str = strdup(arg);
*po->u.str_arg = str;
} else if (po->flags & OPT_BOOL) {
*po->u.int_arg = 1;
} else {
po->u.func_arg(arg);
}
} else {
parse_arg_file(opt);
}
}
}
void print_error(const char *filename, int err)
{
switch(err) {
case AVERROR_NUMEXPECTED:
fprintf(stderr, "%s: Incorrect image filename syntax.\n"
"Use '%%d' to specify the image number:\n"
" for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
" for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
filename);
break;
case AVERROR_INVALIDDATA:
fprintf(stderr, "%s: Error while parsing header\n", filename);
break;
case AVERROR_NOFMT:
fprintf(stderr, "%s: Unknown format\n", filename);
break;
default:
fprintf(stderr, "%s: Error while opening file\n", filename);
break;
}
}
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