/*
 * Copyright (C) 2010-2011 Mamadou Diop.
 *
 * Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
 *	
 * This file is part of Open Source Doubango Framework.
 *
 * DOUBANGO 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 3 of the License, or
 * (at your option) any later version.
 *	
 * DOUBANGO 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 DOUBANGO.
 *
 */
 
 /**@file tsip_header_Date.c
  * @brief SIP DUmmy header.
  *
  * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
  *
 
  */
 #include "tinysip/headers/tsip_header_Date.h"
 
 #include "tinysip/parsers/tsip_parser_uri.h"
 
 #include "tsk_debug.h"
 #include "tsk_memory.h"
 
 #include <string.h>
 
 
 
 /***********************************
 *	Ragel state machine.
 */
 %%{
 	machine tsip_machine_parser_header_Date;
 
 	# Includes
 	include tsip_machine_utils "./ragel/tsip_machine_utils.rl";
 	
 	action tag{
 		tag_start = p;
 	}
 
 	action parse_wkday{
 		TSK_PARSER_SET_STRING(hdr_Date->wkday);
 	}
 
 	action parse_day{
 		TSK_PARSER_SET_INTEGER(hdr_Date->day);
 	}
 
 	action parse_month{
 		TSK_PARSER_SET_STRING(hdr_Date->month);
 	}
 
 	action parse_year{
 		TSK_PARSER_SET_INTEGER(hdr_Date->year);
 	}
 
 	action parse_h{
 		TSK_PARSER_SET_INTEGER(hdr_Date->time.h);
 	}
 
 	action parse_m{
 		TSK_PARSER_SET_INTEGER(hdr_Date->time.m);
 	}
 
 	action parse_s{
 		TSK_PARSER_SET_INTEGER(hdr_Date->time.s);
 	}
 
 	action eob{
 	}
 		
 	wkday = "Mon"i | "Tue"i | "Wed"i | "Thu"i | "Fri"i | "Sat"i | "Sun"i;
 	month = "Jan"i | "Feb"i | "Mar"i | "Apr"i | "May"i | "Jun"i | "Jul"i | "Aug"i | "Sep"i | "Oct"i | "Nov"i | "Dec"i;
 	date1 = DIGIT{2}>tag %parse_day SP month>tag %parse_month SP DIGIT{4}>tag %parse_year;
 	time = DIGIT{2}>tag %parse_h ":" DIGIT{2}>tag %parse_m ":" DIGIT{2}>tag %parse_s;
 	rfc1123_date = wkday>tag %parse_wkday "," SP date1 SP time SP "GMT"i;
 	SIP_date = rfc1123_date;
 	Date = "Date"i HCOLON SIP_date;
 	
 	# Entry point
 	main := Date :>CRLF @eob;
 
 }%%
 
 tsip_header_Date_t* tsip_header_Date_create(const char* wkday, const char* month, int8_t day, int16_t year, int8_t h, int8_t m, int8_t s)
 {
 	return tsk_object_new(TSIP_HEADER_DATE_VA_ARGS(wkday, month, day, year, h, m, s));
 }
 
 tsip_header_Date_t* tsip_header_Date_create_null()
 {
 	return tsip_header_Date_create(tsk_null, tsk_null, -1, -1, -1, -1, -1);
 }
 
 int tsip_header_Date_serialize(const tsip_header_t* header, tsk_buffer_t* output)
 {
 	/* Date: Wed, 28 Apr 2010 23:42:50 GMT */
 	if(header){
 		const tsip_header_Date_t *Date = (const tsip_header_Date_t *)header;
 		if(Date->month){
 			tsk_buffer_append_2(output, "%s, %d %s %d %d:%d:%d GMT", 
 				Date->wkday, Date->day, Date->month, Date->year, Date->time.h, Date->time.m, Date->time.s);
 		}
 		return 0;
 	}
 
 	return -1;
 }
 
 tsip_header_Date_t *tsip_header_Date_parse(const char *data, tsk_size_t size)
 {
 	int cs = 0;
 	const char *p = data;
 	const char *pe = p + size;
 	const char *eof = pe;
 	tsip_header_Date_t *hdr_Date = tsip_header_Date_create_null();
 	
 	const char *tag_start = tsk_null;
 
 	%%write data;
 	(void)(eof);
 	(void)(tsip_machine_parser_header_Date_first_final);
 	(void)(tsip_machine_parser_header_Date_error);
 	(void)(tsip_machine_parser_header_Date_en_main);
 	%%write init;
 	%%write exec;
 	
 	if( cs < %%{ write first_final; }%% ){
 		TSK_DEBUG_ERROR("Failed to parse 'Date' header.");
 		TSK_OBJECT_SAFE_FREE(hdr_Date);
 	}
 	
 	return hdr_Date;
 }
 
 
 
 
 
 
 
 //========================================================
 //	Date header object definition
 //
 
 static tsk_object_t* tsip_header_Date_ctor(tsk_object_t *self, va_list * app)
 {
 	tsip_header_Date_t *Date = self;
 	if(Date){
 		const char* wkday;
 		const char* month;
 		TSIP_HEADER(Date)->type = tsip_htype_Date;
 		TSIP_HEADER(Date)->serialize = tsip_header_Date_serialize;
 		Date->day = Date->time.h = Date->time.m = Date->time.s = -1;
 		Date->year = -1;
 
 		if((wkday = va_arg(*app, const char*))){
 			month = va_arg(*app, const char*);
 
 			Date->wkday = tsk_strdup(wkday);
 			Date->month = tsk_strdup(month);
 
 #if defined __GNUC__
 			Date->day = (int8_t)va_arg(*app, int);
 			Date->year = (int16_t)va_arg(*app, int);
 			Date->time.h = (int8_t)va_arg(*app, int);
 			Date->time.m = (int8_t)va_arg(*app, int);
 			Date->time.s = (int8_t)va_arg(*app, int);
 #else
 			Date->day = va_arg(*app, int8_t);
 			Date->year = va_arg(*app, int16_t);
 			Date->time.h = va_arg(*app, int8_t);
 			Date->time.m = va_arg(*app, int8_t);
 			Date->time.s = va_arg(*app, int8_t);
 #endif
 		}
 	}
 	else{
 		TSK_DEBUG_ERROR("Failed to create new Date header.");
 	}
 	return self;
 }
 
 static tsk_object_t* tsip_header_Date_dtor(tsk_object_t *self)
 {
 	tsip_header_Date_t *Date = self;
 	if(Date){
 		TSK_FREE(Date->wkday);
 		TSK_FREE(Date->month);
 
 		TSK_OBJECT_SAFE_FREE(TSIP_HEADER_PARAMS(Date));
 	}
 	else{
 		TSK_DEBUG_ERROR("Null Date header.");
 	}
 
 	return self;
 }
 
 static const tsk_object_def_t tsip_header_Date_def_s = 
 {
 	sizeof(tsip_header_Date_t),
 	tsip_header_Date_ctor,
 	tsip_header_Date_dtor,
 	tsk_null
 };
 const tsk_object_def_t *tsip_header_Date_def_t = &tsip_header_Date_def_s;