/*
 * 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_K.c
  * @brief SDP "k=" header (Encryption Key).
  */
 #include "tinysdp/headers/tsdp_header_K.h"
 
 #include "tsk_debug.h"
 #include "tsk_memory.h"
 #include "tsk_string.h"
 
 #include <string.h>
 
 /***********************************
 *	Ragel state machine.
 */
 %%{
 	machine tsdp_machine_parser_header_K;
 
 	# Includes
 	include tsdp_machine_utils "./ragel/tsdp_machine_utils.rl";
 	
 	action tag{
 		tag_start = p;
 	}
 
 	action parse_value{
 		TSK_PARSER_SET_STRING(hdr_K->value);
 	}
 		
 	K = 'k' SP* "=" SP*<: any*>tag %parse_value;
 	
 	# Entry point
 	main := K :>CRLF?;
 
 }%%
 
 
 
 tsdp_header_K_t* tsdp_header_K_create(const char* value)
 {
 	return tsk_object_new(TSDP_HEADER_K_VA_ARGS(value));
 }
 
 tsdp_header_K_t* tsdp_header_K_create_null()
 {
 	return tsdp_header_K_create(tsk_null);
 }
 
 int tsdp_header_K_tostring(const tsdp_header_t* header, tsk_buffer_t* output)
 {
 	if(header){
 		const tsdp_header_K_t *K = (const tsdp_header_K_t *)header;
 		if(K->value){
 			tsk_buffer_append(output, K->value, tsk_strlen(K->value));
 		}
 		return 0;
 	}
 
 	return -1;
 }
 
 tsdp_header_t* tsdp_header_K_clone(const tsdp_header_t* header)
 {
 	if(header){
 		const tsdp_header_K_t *K = (const tsdp_header_K_t *)header;
 		return (tsdp_header_t*)tsdp_header_K_create(K->value);
 	}
 	return tsk_null;
 }
 
 tsdp_header_K_t *tsdp_header_K_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_K_t *hdr_K = tsdp_header_K_create_null();
 	
 	const char *tag_start = tsk_null;
 
 	TSK_RAGEL_DISABLE_WARNINGS_BEGIN()
 	%%write data;
 	(void)(tsdp_machine_parser_header_K_first_final);
 	(void)(tsdp_machine_parser_header_K_error);
 	(void)(tsdp_machine_parser_header_K_en_main);
 	%%write init;
 	%%write exec;
 	TSK_RAGEL_DISABLE_WARNINGS_END()
 	
 	if( cs < %%{ write first_final; }%% ){
 		TSK_DEBUG_ERROR("Failed to parse \"k=\" header.");
 		TSK_OBJECT_SAFE_FREE(hdr_K);
 	}
 	
 	return hdr_K;
 }
 
 
 
 
 
 
 
 //========================================================
 //	K header object definition
 //
 
 static tsk_object_t* tsdp_header_K_ctor(tsk_object_t *self, va_list * app)
 {
 	tsdp_header_K_t *K = self;
 	if(K){
 		TSDP_HEADER(K)->type = tsdp_htype_K;
 		TSDP_HEADER(K)->tostring = tsdp_header_K_tostring;
 		TSDP_HEADER(K)->clone = tsdp_header_K_clone;
 		TSDP_HEADER(K)->rank = TSDP_HTYPE_P_RANK;
 		
 		K->value = tsk_strdup(va_arg(*app, const char*));
 	}
 	else{
 		TSK_DEBUG_ERROR("Failed to create new K header.");
 	}
 	return self;
 }
 
 static tsk_object_t* tsdp_header_K_dtor(tsk_object_t *self)
 {
 	tsdp_header_K_t *K = self;
 	if(K){
 		TSK_FREE(K->value);
 	}
 	else{
 		TSK_DEBUG_ERROR("Null K header.");
 	}
 
 	return self;
 }
 static int tsdp_header_K_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_K_def_s = 
 {
 	sizeof(tsdp_header_K_t),
 	tsdp_header_K_ctor,
 	tsdp_header_K_dtor,
 	tsdp_header_K_cmp
 };
 
 const tsk_object_def_t *tsdp_header_K_def_t = &tsdp_header_K_def_s;