gecko/js/src/json.h

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is SpiderMonkey JSON.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998-1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Robert Sayre <sayrer@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
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 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef json_h___
#define json_h___
/*
 * JS JSON functions.
 */
#include "jsscan.h"

#define JSON_MAX_DEPTH  2048
#define JSON_PARSER_BUFSIZE 1024

extern js::Class js_JSONClass;

extern JSObject *
js_InitJSONClass(JSContext *cx, JSObject *obj);

extern JSBool
js_Stringify(JSContext *cx, js::Value *vp, JSObject *replacer,
             const js::Value &space, JSCharBuffer &cb);

extern JSBool js_TryJSON(JSContext *cx, js::Value *vp);

/* JSON parsing states; most permit leading whitespace. */
enum JSONParserState {
    /* Start of string. */
    JSON_PARSE_STATE_INIT,

    /* JSON fully processed, expecting only trailing whitespace. */
    JSON_PARSE_STATE_FINISHED,

    /* Unused: to be removed in bug 564621. */
    JSON_PARSE_STATE_OBJECT_VALUE,

    /* Start of JSON value. */
    JSON_PARSE_STATE_VALUE,

    /* In object, at start of pair, at comma, or at closing brace. */
    JSON_PARSE_STATE_OBJECT,

    /* At start of pair within object, or at closing brace. */
    JSON_PARSE_STATE_OBJECT_PAIR,

    /* At : in key/value pair in object. */
    JSON_PARSE_STATE_OBJECT_IN_PAIR,

    /* In array, at start of element, at comma, or at closing bracket. */
    JSON_PARSE_STATE_ARRAY,


    /* The following states allow no leading whitespace. */

    /* Within string literal. */
    JSON_PARSE_STATE_STRING,

    /* At first character after \ in string literal. */
    JSON_PARSE_STATE_STRING_ESCAPE,

    /* Within numbers in \uXXXX in string literal. */
    JSON_PARSE_STATE_STRING_HEX,

    /* Within numeric literal. */
    JSON_PARSE_STATE_NUMBER,

    /* Handling keywords (only null/true/false pass validity post-check). */
    JSON_PARSE_STATE_KEYWORD
};

enum JSONDataType {
    JSON_DATA_STRING,
    JSON_DATA_KEYSTRING,
    JSON_DATA_NUMBER,
    JSON_DATA_KEYWORD
};

struct JSONParser;

extern JSONParser *
js_BeginJSONParse(JSContext *cx, js::Value *rootVal, bool suppressErrors = false);

extern JSBool
js_ConsumeJSONText(JSContext *cx, JSONParser *jp, const jschar *data, uint32 len);

extern bool
js_FinishJSONParse(JSContext *cx, JSONParser *jp, const js::Value &reviver);

#endif /* json_h___ */