#ifndef HTTP_REQUEST_PARSER_HPP
#define HTTP_REQUEST_PARSER_HPP

#include <boost/logic/tribool.hpp>
#include <boost/tuple/tuple.hpp>



struct HttpRequest;

/// Parser for incoming requests.
class HttpRequestParser
{
	/// Handle the next character of input.
	boost::tribool consume(HttpRequest& req, char input);

	/// Check if a byte is an HTTP character.
	static bool is_char(int c);

	/// Check if a byte is an HTTP control character.
	static bool is_ctl(int c);

	/// Check if a byte is defined as an HTTP special character.
	static bool is_tspecial(int c);

	/// Check if a byte is a digit.
	static bool is_digit(int c);

	/// The current state of the parser.
	enum state
	{
		method_start,
		method,
		uri_start,
		uri,
		http_version_h,
		http_version_t_1,
		http_version_t_2,
		http_version_p,
		http_version_slash,
		http_version_major_start,
		http_version_major,
		http_version_minor_start,
		http_version_minor,
		expecting_newline_1,
		header_line_start,
		header_lws,
		header_name,
		space_before_header_value,
		header_value,
		expecting_newline_2,
		expecting_newline_3
	} state_;
public:
	/// Construct ready to parse the request method.
	HttpRequestParser();

	/// Reset to initial parser state.
	void reset();

	/// Parse some data. The tribool return value is true when a complete request
	/// has been parsed, false if the data is invalid, indeterminate when more
	/// data is required. The InputIterator return value indicates how much of the
	/// input has been consumed.
	//template <typename InputIterator>
	boost::tribool parse(HttpRequest& req, char*, char*);

	
};


#endif // HTTP_REQUEST_PARSER_HPP