ti83-sdk/tool/rabbitsign-src/cmdline.c

113 lines
2.4 KiB
C

/*
* RabbitSign - Tools for signing TI graphing calculator software
* Copyright (C) 2009 Benjamin Moody
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#ifdef HAVE_STRING_H
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
#endif
#include "rabbitsign.h"
#include "internal.h"
#if !defined(strchr) && !defined(HAVE_STRCHR) && defined(HAVE_INDEX)
# define strchr index
#endif
/*
* Parse and return next command line option.
*/
int rs_parse_cmdline(int argc, char** argv, const char* optstring,
int* i, int* j, const char** arg)
{
char c;
char* p;
if (*i >= argc)
return RS_CMDLINE_FINISHED;
if (argv[*i][0] != '-' || argv[*i][1] == 0) {
*arg = argv[*i];
(*i)++;
*j = 1;
return RS_CMDLINE_FILENAME;
}
if (argv[*i][1] == '-') {
if (!strcasecmp(argv[*i], "--help")) {
(*i)++;
*j = 1;
return RS_CMDLINE_HELP;
}
else if (!strcasecmp(argv[*i], "--version")) {
(*i)++;
*j = 1;
return RS_CMDLINE_VERSION;
}
else {
rs_error(NULL, NULL, "unrecognized option %s (try --help)", argv[*i]);
return RS_CMDLINE_ERROR;
}
}
c = argv[*i][*j];
if (c == ':' || !(p = strchr(optstring, c))) {
rs_error(NULL, NULL, "unrecognized option -%c (try --help)", c);
return RS_CMDLINE_ERROR;
}
if (p[1] == ':') {
if (argv[*i][*j + 1]) {
*arg = &argv[*i][*j + 1];
(*i)++;
*j = 1;
return c;
}
else {
(*i) += 2;
*j = 1;
if (*i > argc) {
rs_error(NULL, NULL, "-%c: requires an argument", c);
return RS_CMDLINE_ERROR;
}
*arg = argv[*i - 1];
return c;
}
}
else {
if (argv[*i][*j + 1]) {
(*j)++;
}
else {
(*i)++;
*j = 1;
}
*arg = NULL;
return c;
}
}