Args.h

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/*
 *  Copyright (C) 2000-2001  The Exult Team
 *  Copyright (C) 2002-2003  The Pentagram Team
 *
 *  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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef _ARGS_H_
#define _ARGS_H_

// Handy argument processor. I'm certain the implementation could be better
// but it suffices quite well at the moment.

#include "common_types.h"

#include <string>
#include <vector>

class Args
{
        public:
                Args()  { };
                ~Args() { };
        
        struct Option
        {
                Option() : option(""), valuetype(no_type) { };
                // bool
                Option(const char *option_cstr, bool *value, const bool defaultvalue=true)
                        : option(option_cstr), _bool_val(value), _bool_default(defaultvalue),
                        valuetype(Option::type_bool)
                {  /* Odd... looks like the 'default' value for bool, isn't. It's the value you set it to, if the flag is found*/ };
                // string
                Option(const char *option_cstr, std::string *value, const char *defaultvalue=0)
                        : option(option_cstr), _str_val(value),
                        _str_default(defaultvalue?defaultvalue:""), valuetype(Option::type_str)
                { *_str_val=_str_default; };
                // sint
                Option(const char *option_cstr, sint32 *value, const sint32 defaultvalue=true)
                        : option(option_cstr), _sint_val(value), _sint_default(defaultvalue),
                        valuetype(Option::type_sint)
                { *_sint_val=_sint_default; };
                // uint
                Option(const char *option_cstr, uint32 *value, const uint32 defaultvalue=true)
                        : option(option_cstr), _uint_val(value), _uint_default(defaultvalue),
                        valuetype(Option::type_uint)
                { *_uint_val=_uint_default; };
                                 
                ~Option() { };
                
                std::string option;
                
                bool        *_bool_val;
                std::string *_str_val;
                sint32      *_sint_val;
                uint32      *_uint_val;

                bool        _bool_default;
                std::string _str_default;
                sint32      _sint_default;
                uint32      _uint_default;
                
                enum { no_type=0, type_bool, type_str, type_sint, type_uint } valuetype;
        };
        
        std::vector<Option> options;
        
        // bool
        inline void declare(const char *option_cstr, bool *value, const bool defaultvalue=true)
        { options.push_back(Option(option_cstr, value, defaultvalue)); };
        // string
        inline void declare(const char *option_cstr, std::string *value, const char *defaultvalue=0)
        { options.push_back(Option(option_cstr, value, defaultvalue)); };
        // sint
        inline void declare(const char *option_cstr, sint32 *value, const sint32 defaultvalue=0)
        { options.push_back(Option(option_cstr, value, defaultvalue)); };
        // uint
        inline void declare(const char *option_cstr, uint32 *value, const uint32 defaultvalue=0)
        { options.push_back(Option(option_cstr, value, defaultvalue)); };

        void process(const sint32 argc, const char * const * const argv);
};

#endif

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