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/*
   filesystem/inistream.h
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#ifndef __INCLUDED_FILESYSTEM_INISTREAM_H__
#define __INCLUDED_FILESYSTEM_INISTREAM_H__

#include <string>
#include <fstream>

#include "math/vector2f.h"
#include "math/vector3f.h"
#include "math/color.h"
#include "filesystem/filestream.h"

namespace filesystem
{

/**
 * @brief a class to read ini streams
 * The IniStream class is able to decode the structure of a windows-like .ini file from a text stream.
 **/
class IniStream
{
public:
	IniStream();

	~IniStream();

	/// parse one line, returns false on end-of-file
	bool getline(std::istream & istream);

	/// current section label
	inline const std::string & section() const
	{
		return section_current;
	}

	/// current key
	inline const std::string & key() const
	{
		return key_current;
	}

	/// current value
	inline const std::string & value() const
	{
		return value_current;
	}
	
	/// current line number	
	inline unsigned int line() const
	{
		return line_number;
	}

	/// true if the last read statement was a section header
	bool got_section() const;

	/// true if the current section matches
	bool in_section(const char *sectionlabel) const;

	/// true if the last read statement was a certain section header
	bool got_section(const char * sectionlabel) const;

	/// true if the last read statement was a key=value pair
	bool got_key() const;

	bool got_key(const char * keylabel);

	/// check if the last read key=value pair matches keylabel and store the value in valuestring
	bool got_key_string(const char * keylabel, std::string & valuestring);

	/// check if the last read key=value pair matches keylabel and store the value in valuestring, converted to label
	bool got_key_label(const char * keylabel, std::string & labelstring);
	
	bool got_key_color(const char * keylabel, math::Color & color);

	bool got_key_float(const char * keylabel, float & f);

	bool got_key_angle(const char * keylabel, float & f);

	bool got_key_long(const char * keylabel, long & l);

	bool got_key_vector2f(const char * keylabel, math::Vector2f & v);
		
	/**
	 * @brief special version that reads 1 or 2 arguments
	 **/ 
	bool got_key_vector2f_opt(const char * keylabel, math::Vector2f & v);

	bool got_key_vector3f(const char * keylabel, math::Vector3f & v);
	
	/**
	 * @brief special version that reads 1,2 or 3 arguments
	 **/ 
	bool got_key_vector3f_opt(const char * keylabel, math::Vector3f & v);

	bool got_key_bool(const char * keylabel, bool & b);

protected:
	void clear();
	
private:
	std::string 		section_current;
	std::string 		key_current;
	std::string 		value_current;

	bool 			last_read_was_key;
	bool 			last_read_was_section;

	unsigned int 		line_number;
};

}

#endif // __INCLUDED_FILESYSTEM_INISTREAM_H__