/*
 * Copyright (c) 2013 Yaroslav Stavnichiy <yarosla@gmail.com>
 *
 * This file is part of NXJSON.
 *
 * NXJSON is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *
 * NXJSON 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with NXJSON. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef NXJSON_H
#define NXJSON_H

#ifdef  __cplusplus
extern "C" {
#endif

#ifndef NXJSON_TYPE_U64

#include <stdint.h>

typedef uint64_t nxjson_u64;
#endif

#ifndef NXJSON_TYPE_S64

#include <stdint.h>

typedef uint64_t nxjson_s64;
#endif

typedef enum nx_json_type {
	NX_JSON_NULL,    // this is null value
	NX_JSON_OBJECT,  // this is an object; properties can be found in child nodes
	NX_JSON_ARRAY,   // this is an array; items can be found in child nodes
	NX_JSON_STRING,  // this is a string; value can be found in text_value field
	NX_JSON_INTEGER, // this is an integer; value can be found in int_value field
	NX_JSON_DOUBLE,  // this is a double; value can be found in dbl_value field
	NX_JSON_BOOL     // this is a boolean; value can be found in int_value field
} nx_json_type;

typedef struct nx_json {
	nx_json_type type;       // type of json node, see above
	const char *key;         // key of the property; for object's children only
	union {
		const char *text_value;  // text value of STRING node
		struct {
			union {
				nxjson_u64 u_value;    // the value of INTEGER or BOOL node
				nxjson_s64 s_value;
			};
			double dbl_value;      // the value of DOUBLE node
		} num;
		struct { // children of OBJECT or ARRAY
			int length;
			struct nx_json *first;
			struct nx_json *last;
		} children;
	};
	struct nx_json *next;    // points to next child
} nx_json;

typedef int (*nx_json_unicode_encoder)(unsigned int codepoint, char *p, char **endp);

extern nx_json_unicode_encoder nx_json_unicode_to_utf8;

const nx_json *nx_json_parse(char *text, nx_json_unicode_encoder encoder);

const nx_json *nx_json_parse_utf8(char *text);

void nx_json_free(const nx_json *js);

const nx_json *nx_json_get(const nx_json *json, const char *key); // get object's property by key
const nx_json *nx_json_item(const nx_json *json, int idx); // get array element by index


#ifdef  __cplusplus
}
#endif

#endif  /* NXJSON_H */