mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
177 lines
5.3 KiB
C++
177 lines
5.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* vim: set ts=8 sw=4 et tw=99:
|
|
*
|
|
* ***** 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
|
|
* the Mozilla Foundation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2011
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Jeff Walden <jwalden+code@mit.edu> (original author)
|
|
*
|
|
* 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
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* 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 jsonparser_h___
|
|
#define jsonparser_h___
|
|
|
|
#include "mozilla/RangedPtr.h"
|
|
|
|
#include "jscntxt.h"
|
|
#include "jsstr.h"
|
|
#include "jsvalue.h"
|
|
|
|
/*
|
|
* NB: This class must only be used on the stack as it contains a js::Value.
|
|
*/
|
|
class JSONParser
|
|
{
|
|
public:
|
|
enum ErrorHandling { RaiseError, NoError };
|
|
enum ParsingMode { StrictJSON, LegacyJSON };
|
|
|
|
private:
|
|
/* Data members */
|
|
|
|
JSContext * const cx;
|
|
mozilla::RangedPtr<const jschar> current;
|
|
const mozilla::RangedPtr<const jschar> end;
|
|
|
|
js::Value v;
|
|
|
|
const ParsingMode parsingMode;
|
|
const ErrorHandling errorHandling;
|
|
|
|
enum Token { String, Number, True, False, Null,
|
|
ArrayOpen, ArrayClose,
|
|
ObjectOpen, ObjectClose,
|
|
Colon, Comma,
|
|
OOM, Error };
|
|
#ifdef DEBUG
|
|
Token lastToken;
|
|
#endif
|
|
|
|
public:
|
|
/* Public API */
|
|
|
|
/*
|
|
* Create a parser for the provided JSON data. The parser will accept
|
|
* certain legacy, non-JSON syntax if decodingMode is LegacyJSON.
|
|
* Description of this syntax is deliberately omitted: new code should only
|
|
* use strict JSON parsing.
|
|
*/
|
|
JSONParser(JSContext *cx, const jschar *data, size_t length,
|
|
ParsingMode parsingMode = StrictJSON,
|
|
ErrorHandling errorHandling = RaiseError)
|
|
: cx(cx),
|
|
current(data, length),
|
|
end(data + length, data, length),
|
|
parsingMode(parsingMode),
|
|
errorHandling(errorHandling)
|
|
#ifdef DEBUG
|
|
, lastToken(Error)
|
|
#endif
|
|
{
|
|
JS_ASSERT(current <= end);
|
|
}
|
|
|
|
/*
|
|
* Parse the JSON data specified at construction time. If it parses
|
|
* successfully, store the prescribed value in *vp and return true. If an
|
|
* internal error (e.g. OOM) occurs during parsing, return false.
|
|
* Otherwise, if invalid input was specifed but no internal error occurred,
|
|
* behavior depends upon the error handling specified at construction: if
|
|
* error handling is RaiseError then throw a SyntaxError and return false,
|
|
* otherwise return true and set *vp to |undefined|. (JSON syntax can't
|
|
* represent |undefined|, so the JSON data couldn't have specified it.)
|
|
*/
|
|
bool parse(js::Value *vp);
|
|
|
|
private:
|
|
js::Value numberValue() const {
|
|
JS_ASSERT(lastToken == Number);
|
|
JS_ASSERT(v.isNumber());
|
|
return v;
|
|
}
|
|
|
|
js::Value stringValue() const {
|
|
JS_ASSERT(lastToken == String);
|
|
JS_ASSERT(v.isString());
|
|
return v;
|
|
}
|
|
|
|
js::Value atomValue() const {
|
|
js::Value strval = stringValue();
|
|
JS_ASSERT(strval.toString()->isAtom());
|
|
return strval;
|
|
}
|
|
|
|
Token token(Token t) {
|
|
JS_ASSERT(t != String);
|
|
JS_ASSERT(t != Number);
|
|
#ifdef DEBUG
|
|
lastToken = t;
|
|
#endif
|
|
return t;
|
|
}
|
|
|
|
Token stringToken(JSString *str) {
|
|
this->v = js::StringValue(str);
|
|
#ifdef DEBUG
|
|
lastToken = String;
|
|
#endif
|
|
return String;
|
|
}
|
|
|
|
Token numberToken(jsdouble d) {
|
|
this->v = js::NumberValue(d);
|
|
#ifdef DEBUG
|
|
lastToken = Number;
|
|
#endif
|
|
return Number;
|
|
}
|
|
|
|
enum StringType { PropertyName, LiteralValue };
|
|
template<StringType ST> Token readString();
|
|
|
|
Token readNumber();
|
|
|
|
Token advance();
|
|
Token advancePropertyName();
|
|
Token advancePropertyColon();
|
|
Token advanceAfterProperty();
|
|
Token advanceAfterObjectOpen();
|
|
Token advanceAfterArrayElement();
|
|
|
|
void error(const char *msg);
|
|
bool errorReturn();
|
|
};
|
|
|
|
#endif /* jsonparser_h___ */
|