/*
 * Arguments 2.0 Beta - A Command Line Processing Library
 * Copyright (C) 2000, 2001 Jared Davis 
 *
 * 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 INCLUDED_OPENDELI_ARGUMENTS_H
#define INCLUDED_OPENDELI_ARGUMENTS_H

#if (defined(_WIN32) && defined(_DEBUG))
// In visual studio, compiling this library gives you a billion and a half 
// error messages that "debug information has been truncated to 255 chars"
// because the visual studio debugger can't handle symbols longer than 255
// characters.  This disables this warning so we comile cleanly.
	#pragma warning( disable: 4786 )
#endif 

#include <vector>
#include <string>
#include <sstream>

using namespace std;

class Arguments
{
	private:

		// Vector of the arguments that take spaces.
		static std::vector<std::string> s_spaceArgs;

		// Vector of argument-value pairs.
		std::vector< std::pair<std::string, std::pair<std::string, bool> > > d_arguments;


		// explodes a delimited string into its tokens.
		static void ExplodeString(const std::string& str, std::vector<std::string>& tokens, char delimiter)
			throw(std::bad_alloc);

		// finds the index of the argument arg.
		int findArgument(const std::string& arg) const throw();

		//
		// convert(source, target)
		//   Converts a variable of type A into a variable of type B by passing
		//   it through a strstream.
		//
		template<class A, class B>
		static bool convert(const A& source, B& target) throw()
		{
			std::stringstream ss;
			ss.clear();
			ss << source;
			ss >> target;
			return (!ss.bad() && !ss.fail());
		}


	public:

		static void setArgumentsWithSpaces(const std::string& args) 
			throw(std::bad_alloc); 

		Arguments(int argc, const char** argv) 
			throw(std::bad_alloc); 	

		unsigned int size() const throw();

		bool has(const std::string& arg) const throw(std::bad_alloc);
		
		template<class A, class B> bool get
		(const std::string& arg, A& value, const B& default_value) const 
		throw(std::bad_alloc)
		{
			int index = findArgument(arg);

			if (index == -1) {
				value = default_value;
				return false;
			}

			else 
			{
				bool ret = convert(d_arguments[index].second.first, value);
				if (!ret) 
					value = default_value;
				return ret;
			}
		}


		#ifndef NDEBUG
			void debug() const;
		#endif

};

#endif // INCLUDED_OPENDELI_ARGUMENTS_H