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/*
* Copyright 2003-2016 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_UTIL_OPTIONPARSER_HXX
#define MPD_UTIL_OPTIONPARSER_HXX
#include <assert.h>
class OptionDef;
/**
* Command line option parser.
*/
class OptionParser
{
int argc;
char **argv;
char *option;
char *option_raw;
bool is_long;
public:
/**
* Constructs #OptionParser.
*/
OptionParser(int _argc, char **_argv)
: argc(_argc - 1), argv(_argv + 1),
option(nullptr), option_raw(nullptr), is_long(false) { }
/**
* Checks if there are command line entries to process.
*/
bool HasEntries() const { return argc > 0; }
/**
* Gets the last parsed option.
*/
char *GetOption() {
assert(option_raw != nullptr);
return option_raw;
}
/**
* Checks if current option is a specified option.
*/
bool CheckOption(const OptionDef& opt);
/**
* Checks if current option is a specified option
* or specified alternative option.
*/
bool CheckOption(const OptionDef& opt, const OptionDef &alt_opt) {
return CheckOption(opt) || CheckOption(alt_opt);
}
/**
* Parses current command line entry.
* Returns true on success, false otherwise.
* Regardless of result, advances current position to the next
* command line entry.
*/
bool ParseNext();
/**
* Checks if specified string is a command line option.
*/
static bool IsOption(const char *s) {
assert(s != nullptr);
return s[0] == '-';
}
};
#endif
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