113 lines
2.4 KiB
C
113 lines
2.4 KiB
C
/*
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* RabbitSign - Tools for signing TI graphing calculator software
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* Copyright (C) 2009 Benjamin Moody
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_STRING_H
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# include <string.h>
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#else
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# ifdef HAVE_STRINGS_H
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# include <strings.h>
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# endif
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#endif
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#include "rabbitsign.h"
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#include "internal.h"
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#if !defined(strchr) && !defined(HAVE_STRCHR) && defined(HAVE_INDEX)
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# define strchr index
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#endif
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/*
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* Parse and return next command line option.
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*/
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int rs_parse_cmdline(int argc, char** argv, const char* optstring,
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int* i, int* j, const char** arg)
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{
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char c;
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char* p;
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if (*i >= argc)
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return RS_CMDLINE_FINISHED;
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if (argv[*i][0] != '-' || argv[*i][1] == 0) {
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*arg = argv[*i];
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(*i)++;
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*j = 1;
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return RS_CMDLINE_FILENAME;
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}
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if (argv[*i][1] == '-') {
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if (!strcasecmp(argv[*i], "--help")) {
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(*i)++;
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*j = 1;
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return RS_CMDLINE_HELP;
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}
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else if (!strcasecmp(argv[*i], "--version")) {
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(*i)++;
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*j = 1;
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return RS_CMDLINE_VERSION;
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}
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else {
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rs_error(NULL, NULL, "unrecognized option %s (try --help)", argv[*i]);
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return RS_CMDLINE_ERROR;
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}
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}
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c = argv[*i][*j];
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if (c == ':' || !(p = strchr(optstring, c))) {
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rs_error(NULL, NULL, "unrecognized option -%c (try --help)", c);
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return RS_CMDLINE_ERROR;
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}
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if (p[1] == ':') {
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if (argv[*i][*j + 1]) {
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*arg = &argv[*i][*j + 1];
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(*i)++;
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*j = 1;
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return c;
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}
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else {
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(*i) += 2;
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*j = 1;
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if (*i > argc) {
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rs_error(NULL, NULL, "-%c: requires an argument", c);
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return RS_CMDLINE_ERROR;
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}
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*arg = argv[*i - 1];
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return c;
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}
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}
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else {
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if (argv[*i][*j + 1]) {
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(*j)++;
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}
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else {
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(*i)++;
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*j = 1;
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}
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*arg = NULL;
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return c;
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}
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}
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