/*************************************************************************
* (C) 2017 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
*  by Michael Pounov <misho@elwix.org>
*
* $Author: misho $
* $Id: ajson.h,v 1.1.2.2 2017/11/24 10:29:15 misho Exp $
*
**************************************************************************
The ELWIX and AITNET software is distributed under the following
terms:

All of the documentation and software included in the ELWIX and AITNET
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>

Copyright 2004 - 2017
	by Michael Pounov <misho@elwix.org>.  All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
   must display the following acknowledgement:
This product includes software developed by Michael Pounov <misho@elwix.org>
ELWIX - Embedded LightWeight unIX and its contributors.
4. Neither the name of AITNET nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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*/
#ifndef __AJSON_H
#define __AJSON_H


/* JSON type identifiers */
typedef enum {
	J_UNDEF = 0,
	J_OBJECT = 1,
	J_ARRAY = 2,
	J_STRING = 3,
	J_NUMBER = 4,
	J_BOOL = 5,
	J_NULL = 6
} jtype_t;

/* JSON error numbers */
typedef enum {
	J_ERR_OK = 0,
	J_ERR_NOMEM = 1,
	J_ERR_INVAL = 2,
	J_ERR_PART = 3
} jerr_t;

/* JSON error strings */
typedef const char jerrstr[] = {
	"No error",
	"Not enough tokens were provided",
	"Invalid character",
	"JSON string isn't full",
	NULL
};

typedef struct _tagParser {
	unsigned long	pos;
	unsigned long	next;
	long		parent;
} json_t;

typedef struct _tagToken {
	jtype_t		tok_type;
	long		tok_start;
	long		tok_end;
	long		tok_size;
	long		tok_parent;
} jtok_t;


/*
 * json_init() - Initialize JSON handler
 *
 * @json = JSON handler, if there is NULL then dynamically will be allocated
 * return: =NULL error or !=NULL ready for use JSON handler.
 */
json_t *json_init(json_t * __restrict json);

/*
 * json_free() - Free JSON handler
 *
 * @json = JSON handler
 * return: none
 */
void json_free(json_t **json);

/*
 * json_parse() - Parse JSON string
 *
 * @json = JSON handler
 * @jstr = JSON string
 * @jlen = JSON string length
 * @jtoks = Token array
 * @toksnum = Token array size, return number of allocated tokens in array
 * return: -1 error or number of found tokens 
 */
unsigned int json_parse(json_t * __restrict json, const char *jstr, size_t jlen, 
		jtok_t * __restrict jtoks, unsigned int toksnum);


#endif