/*
 * Copyright (C) 2010-2015 Mamadou Diop.
 *	
 * 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 tsdp_header_I.c
  * @brief SDP "i=" header (Session Information).
  */
 #include "tinysdp/headers/tsdp_header_I.h"
 
 #include "tsk_debug.h"
 #include "tsk_memory.h"
 #include "tsk_string.h"
 
 #include <string.h>
 
 /***********************************
 *	Ragel state machine.
 */
 %%{
 	machine tsdp_machine_parser_header_I;
 
 	# Includes
 	include tsdp_machine_utils "./ragel/tsdp_machine_utils.rl";
 	
 	action tag{
 		tag_start = p;
 	}
 
 	action parse_value{
 		TSK_PARSER_SET_STRING(hdr_I->value);
 	}
 		
 	I = 'i' SP* "=" SP*<: any*>tag %parse_value;
 	
 	# Entry point
 	main := I :>CRLF?;
 
 }%%
 
 
 tsdp_header_I_t* tsdp_header_I_create(const char* value)
 {
 	return tsk_object_new(TSDP_HEADER_I_VA_ARGS(value));
 }
 
 tsdp_header_I_t* tsdp_header_I_create_null()
 {
 	return tsdp_header_I_create(tsk_null);
 }
 
 int tsdp_header_I_tostring(const tsdp_header_t* header, tsk_buffer_t* output)
 {
 	if(header)
 	{
 		const tsdp_header_I_t *I = (const tsdp_header_I_t *)header;
 		if(I->value){
 			tsk_buffer_append(output, I->value, tsk_strlen(I->value));
 		}
 		return 0;
 	}
 
 	return -1;
 }
 
 tsdp_header_t* tsdp_header_I_clone(const tsdp_header_t* header)
 {
 	if(header){
 		const tsdp_header_I_t *I = (const tsdp_header_I_t *)header;
 		return (tsdp_header_t*)tsdp_header_I_create(I->value);
 	}
 	return tsk_null;
 }
 
 tsdp_header_I_t *tsdp_header_I_parse(const char *data, tsk_size_t size)
 {
 	int cs = 0;
 	const char *p = data;
 	const char *pe = p + size;
 	const char *eof = pe;
 	tsdp_header_I_t *hdr_I = tsdp_header_I_create_null();
 	
 	const char *tag_start = tsk_null;
 
 	TSK_RAGEL_DISABLE_WARNINGS_BEGIN()
 	%%write data;
 	(void)(tsdp_machine_parser_header_I_first_final);
 	(void)(tsdp_machine_parser_header_I_error);
 	(void)(tsdp_machine_parser_header_I_en_main);
 	%%write init;
 	%%write exec;
 	TSK_RAGEL_DISABLE_WARNINGS_END()
 	
 	if( cs < %%{ write first_final; }%% ){
 		TSK_DEBUG_ERROR("Failed to parse \"i=\" header.");
 		TSK_OBJECT_SAFE_FREE(hdr_I);
 	}
 	
 	return hdr_I;
 }
 
 
 
 
 
 
 
 //========================================================
 //	I header object definition
 //
 
 static tsk_object_t* tsdp_header_I_ctor(tsk_object_t *self, va_list * app)
 {
 	tsdp_header_I_t *I = self;
 	if(I)
 	{
 		TSDP_HEADER(I)->type = tsdp_htype_I;
 		TSDP_HEADER(I)->tostring = tsdp_header_I_tostring;
 		TSDP_HEADER(I)->clone = tsdp_header_I_clone;
 		TSDP_HEADER(I)->rank = TSDP_HTYPE_I_RANK;
 		
 		I->value = tsk_strdup(va_arg(*app, const char*));
 	}
 	else{
 		TSK_DEBUG_ERROR("Failed to create new I header.");
 	}
 	return self;
 }
 
 static tsk_object_t* tsdp_header_I_dtor(tsk_object_t *self)
 {
 	tsdp_header_I_t *I = self;
 	if(I){
 		TSK_FREE(I->value);
 	}
 	else{
 		TSK_DEBUG_ERROR("Null I header.");
 	}
 
 	return self;
 }
 static int tsdp_header_I_cmp(const tsk_object_t *obj1, const tsk_object_t *obj2)
 {
 	if(obj1 && obj2){
 		return tsdp_header_rank_cmp(obj1, obj2);
 	}
 	else{
 		return -1;
 	}
 }
 
 static const tsk_object_def_t tsdp_header_I_def_s = 
 {
 	sizeof(tsdp_header_I_t),
 	tsdp_header_I_ctor,
 	tsdp_header_I_dtor,
 	tsdp_header_I_cmp
 };
 
 const tsk_object_def_t *tsdp_header_I_def_t = &tsdp_header_I_def_s;