/*
 * Copyright (c) 2010 Serge A. Zaitsev
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef __JSMN_H_
#define __JSMN_H_

#include <stddef.h>

#include <glib.h>
#include <ws_symbol_export.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * JSON type identifier. Basic types are:
 *  o Object
 *  o Array
 *  o String
 *  o Other primitive: number, boolean (true/false) or null
 */
typedef enum {
	JSMN_PRIMITIVE = 0,
	JSMN_OBJECT = 1,
	JSMN_ARRAY = 2,
	JSMN_STRING = 3
} jsmntype_t;

typedef enum {
	/* Not enough tokens were provided */
	JSMN_ERROR_NOMEM = -1,
	/* Invalid character inside JSON string */
	JSMN_ERROR_INVAL = -2,
	/* The string is not a full JSON packet, more bytes expected */
	JSMN_ERROR_PART = -3
} jsmnerr_t;

/**
 * JSON token description.
 * type  type (object, array, string etc.)
 * start start position in JSON data string
 * end   end position in JSON data string
 * size  the size of the token
 */
typedef struct {
	jsmntype_t type;
	int start;
	int end;
	int size;
#ifdef JSMN_PARENT_LINKS
	int parent;
#endif
} jsmntok_t;

/**
 * JSON parser. Contains an array of token blocks available. Also stores
 * the string being parsed now and current position in that string
 */
typedef struct {
	unsigned int pos;           /* offset in the JSON string */
	unsigned int toknext;       /* next token to allocate */
	int toksuper;      /* superior token node, e.g parent object or array */
} jsmn_parser;

/**
 * Create JSON parser over an array of tokens
 */
WS_DLL_PUBLIC void jsmn_init(jsmn_parser *parser);

/**
 * Run JSON parser. It parses a JSON data string into and array of tokens, each describing
 * a single JSON object.
 */
int jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
		jsmntok_t *tokens, unsigned int num_tokens);

/**
 * Check if a buffer is json an returns true if it is.
 */
WS_DLL_PUBLIC gboolean jsmn_is_json(const guint8* buf, const size_t len);

#ifdef __cplusplus
}
#endif

#endif /* __JSMN_H_ */

/*
 * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 4
 * tab-width: 4
 * indent-tabs-mode: t
 * End:
 *
 * vi: set shiftwidth=4 tabstop=4 noexpandtab:
 * :indentSize=4:tabSize=8:noTabs=false:
 */