/*
 * Copyright (c) 2000 - 2016 Samsung Electronics Co., Ltd. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __KEYVAL_H__
#define __KEYVAL_H__

/**
 * keyval.h
 *
 * keyval object
 */

#include <stddef.h>

/* ADT: object */
typedef struct keyval_t keyval_t;

/* Object methods */
typedef struct keyval_method_collection_t keyval_method_collection_t;

typedef void (*keyval_method_free_t)(keyval_t *kv, int do_free_object);
typedef int (*keyval_method_compare_t) (keyval_t *kv1, keyval_t *kv2);
typedef size_t (*keyval_method_get_encoded_size_t)(keyval_t *kv);
typedef size_t (*keyval_method_encode_t)(
		keyval_t *,
		unsigned char **byte,
		size_t *byte_len);
typedef size_t (*keyval_method_decode_t)(unsigned char *byte, keyval_t **kv);

struct keyval_method_collection_t {
	keyval_method_free_t free;
	keyval_method_compare_t compare;
	keyval_method_get_encoded_size_t get_encoded_size;
	keyval_method_encode_t encode;
	keyval_method_decode_t decode;
};

struct keyval_t {
	int type;
	char *key;	/* To be freed. */
	void *val;	/* To be freed. */
	size_t size;	/* Size of a single value. */
	struct keyval_t *next;
	keyval_method_collection_t *method;
};

keyval_t * keyval_new(keyval_t *kv, const char *key,
		const int type, const void *val, const size_t size);
void keyval_free(keyval_t *kv, int do_free_object);
int keyval_compare(keyval_t *kv1, keyval_t *kv2);
size_t keyval_get_encoded_size(keyval_t *kv);
size_t keyval_encode(keyval_t *kv, unsigned char **byte, size_t *byte_len);
size_t keyval_decode(unsigned char *byte, keyval_t **kv);
int keyval_get_data(keyval_t *kv, int *type, void **val, size_t *size);
int keyval_get_type_from_encoded_byte(unsigned char *byte);

#endif /* __KEYVAL_H__ */