mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
1272 lines
36 KiB
C++
1272 lines
36 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sw=4 et tw=99:
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is SpiderMonkey JSON.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Robert Sayre <sayrer@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <string.h>
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#include "jsapi.h"
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#include "jsarena.h"
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#include "jsarray.h"
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#include "jsatom.h"
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#include "jsbool.h"
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#include "jscntxt.h"
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#include "jsdtoa.h"
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#include "jsfun.h"
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#include "jsinterp.h"
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#include "jsiter.h"
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|
#include "jsnum.h"
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#include "jsobj.h"
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#include "jsprf.h"
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#include "jsscan.h"
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#include "jsstr.h"
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#include "jstypes.h"
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#include "jsstdint.h"
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|
#include "jsutil.h"
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#include "jsxml.h"
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#include "jsvector.h"
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|
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#include "json.h"
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|
|
#include "jsatominlines.h"
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|
|
#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable:4351)
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#endif
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|
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struct JSONParser
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{
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JSONParser(JSContext *cx)
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: hexChar(), numHex(), statep(), stateStack(), rootVal(), objectStack(),
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objectKey(cx), buffer(cx)
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|
{}
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|
|
|
/* Used while handling \uNNNN in strings */
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jschar hexChar;
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|
uint8 numHex;
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|
|
JSONParserState *statep;
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JSONParserState stateStack[JSON_MAX_DEPTH];
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|
jsval *rootVal;
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JSObject *objectStack;
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js::Vector<jschar, 8> objectKey;
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js::Vector<jschar, 8> buffer;
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};
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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JSClass js_JSONClass = {
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js_JSON_str,
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JSCLASS_HAS_CACHED_PROTO(JSProto_JSON),
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JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
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JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, NULL,
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JSCLASS_NO_OPTIONAL_MEMBERS
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};
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|
JSBool
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js_json_parse(JSContext *cx, uintN argc, jsval *vp)
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|
{
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JSString *s = NULL;
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jsval *argv = vp + 2;
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|
jsval reviver = JSVAL_NULL;
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JSAutoTempValueRooter tvr(cx, 1, &reviver);
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if (!JS_ConvertArguments(cx, argc, argv, "S / v", &s, &reviver))
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return JS_FALSE;
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JSONParser *jp = js_BeginJSONParse(cx, vp);
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JSBool ok = jp != NULL;
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if (ok) {
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const jschar *chars;
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size_t length;
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s->getCharsAndLength(chars, length);
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ok = js_ConsumeJSONText(cx, jp, chars, length);
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ok &= js_FinishJSONParse(cx, jp, reviver);
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}
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return ok;
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}
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JSBool
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js_json_stringify(JSContext *cx, uintN argc, jsval *vp)
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{
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jsval *argv = vp + 2;
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JSObject *replacer = NULL;
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jsval space = JSVAL_NULL;
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JSAutoTempValueRooter tvr(cx, replacer);
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JSAutoTempValueRooter tvr2(cx, 1, &space);
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// Must throw an Error if there isn't a first arg
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if (!JS_ConvertArguments(cx, argc, argv, "v / o v", vp, &replacer, &space))
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return JS_FALSE;
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JSCharBuffer cb(cx);
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if (!js_Stringify(cx, vp, replacer, space, cb))
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return JS_FALSE;
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// XXX This can never happen to nsJSON.cpp, but the JSON object
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// needs to support returning undefined. So this is a little awkward
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// for the API, because we want to support streaming writers.
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if (!cb.empty()) {
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JSString *str = js_NewStringFromCharBuffer(cx, cb);
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if (!str)
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return JS_FALSE;
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*vp = STRING_TO_JSVAL(str);
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} else {
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*vp = JSVAL_VOID;
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}
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return JS_TRUE;
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}
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JSBool
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js_TryJSON(JSContext *cx, jsval *vp)
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{
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// Checks whether the return value implements toJSON()
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JSBool ok = JS_TRUE;
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if (!JSVAL_IS_PRIMITIVE(*vp)) {
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JSObject *obj = JSVAL_TO_OBJECT(*vp);
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ok = js_TryMethod(cx, obj, cx->runtime->atomState.toJSONAtom, 0, NULL, vp);
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}
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return ok;
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}
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static const char quote = '\"';
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static const char backslash = '\\';
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static const char unicodeEscape[] = "\\u00";
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static JSBool
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write_string(JSContext *cx, JSCharBuffer &cb, const jschar *buf, uint32 len)
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{
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if (!cb.append(quote))
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return JS_FALSE;
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uint32 mark = 0;
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uint32 i;
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for (i = 0; i < len; ++i) {
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if (buf[i] == quote || buf[i] == backslash) {
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if (!cb.append(&buf[mark], i - mark) || !cb.append(backslash) ||
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!cb.append(buf[i])) {
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return JS_FALSE;
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}
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mark = i + 1;
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} else if (buf[i] <= 31 || buf[i] == 127) {
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if (!cb.append(&buf[mark], i - mark) ||
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!js_AppendLiteral(cb, unicodeEscape)) {
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return JS_FALSE;
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}
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char ubuf[3];
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size_t len = JS_snprintf(ubuf, sizeof(ubuf), "%.2x", buf[i]);
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JS_ASSERT(len == 2);
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jschar wbuf[3];
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size_t wbufSize = JS_ARRAY_LENGTH(wbuf);
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if (!js_InflateStringToBuffer(cx, ubuf, len, wbuf, &wbufSize) ||
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!cb.append(wbuf, wbufSize)) {
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return JS_FALSE;
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}
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mark = i + 1;
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}
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}
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if (mark < len && !cb.append(&buf[mark], len - mark))
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return JS_FALSE;
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return cb.append(quote);
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}
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class StringifyContext
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{
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public:
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StringifyContext(JSContext *cx, JSCharBuffer &cb, JSObject *replacer)
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: cb(cb), gap(cx), replacer(replacer), depth(0)
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{}
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JSCharBuffer &cb;
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JSCharBuffer gap;
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JSObject *replacer;
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uint32 depth;
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};
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static JSBool CallReplacerFunction(JSContext *cx, jsid id, JSObject *holder,
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StringifyContext *scx, jsval *vp);
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static JSBool Str(JSContext *cx, jsid id, JSObject *holder,
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StringifyContext *scx, jsval *vp, bool callReplacer = true);
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static JSBool
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WriteIndent(JSContext *cx, StringifyContext *scx, uint32 limit)
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{
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if (!scx->gap.empty()) {
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if (!scx->cb.append('\n'))
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return JS_FALSE;
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for (uint32 i = 0; i < limit; i++) {
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if (!scx->cb.append(scx->gap.begin(), scx->gap.end()))
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return JS_FALSE;
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}
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}
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return JS_TRUE;
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}
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static JSBool
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JO(JSContext *cx, jsval *vp, StringifyContext *scx)
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{
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JSObject *obj = JSVAL_TO_OBJECT(*vp);
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if (!scx->cb.append('{'))
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return JS_FALSE;
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jsval vec[3] = {JSVAL_NULL, JSVAL_NULL, JSVAL_NULL};
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JSAutoTempValueRooter tvr(cx, 3, vec);
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jsval& key = vec[0];
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jsval& outputValue = vec[1];
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JSObject *iterObj = NULL;
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jsval *keySource = vp;
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bool usingWhitelist = false;
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// if the replacer is an array, we use the keys from it
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if (scx->replacer && JS_IsArrayObject(cx, scx->replacer)) {
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usingWhitelist = true;
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vec[2] = OBJECT_TO_JSVAL(scx->replacer);
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keySource = &vec[2];
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}
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if (!js_ValueToIterator(cx, JSITER_ENUMERATE, keySource))
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return JS_FALSE;
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iterObj = JSVAL_TO_OBJECT(*keySource);
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JSBool memberWritten = JS_FALSE;
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JSBool ok;
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do {
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outputValue = JSVAL_VOID;
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ok = js_CallIteratorNext(cx, iterObj, &key);
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if (!ok)
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break;
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if (key == JSVAL_HOLE)
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break;
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jsuint index = 0;
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if (usingWhitelist) {
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// skip non-index properties
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if (!js_IdIsIndex(key, &index))
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continue;
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jsval newKey;
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if (!scx->replacer->getProperty(cx, key, &newKey))
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return JS_FALSE;
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key = newKey;
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}
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JSString *ks;
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if (JSVAL_IS_STRING(key)) {
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ks = JSVAL_TO_STRING(key);
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} else {
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ks = js_ValueToString(cx, key);
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if (!ks) {
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ok = JS_FALSE;
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break;
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}
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}
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JSAutoTempValueRooter keyStringRoot(cx, ks);
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|
// Don't include prototype properties, since this operation is
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|
// supposed to be implemented as if by ES3.1 Object.keys()
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jsid id;
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JSBool found = JS_FALSE;
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if (!js_ValueToStringId(cx, STRING_TO_JSVAL(ks), &id) ||
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!js_HasOwnProperty(cx, obj->map->ops->lookupProperty, obj, id, &found)) {
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ok = JS_FALSE;
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break;
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}
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if (!found)
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continue;
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ok = JS_GetPropertyById(cx, obj, id, &outputValue);
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if (!ok)
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break;
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if (JSVAL_IS_OBJECT(outputValue)) {
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ok = js_TryJSON(cx, &outputValue);
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if (!ok)
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break;
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}
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|
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// call this here, so we don't write out keys if the replacer function
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|
// wants to elide the value.
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if (!CallReplacerFunction(cx, id, obj, scx, &outputValue))
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return JS_FALSE;
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JSType type = JS_TypeOfValue(cx, outputValue);
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// elide undefined values and functions and XML
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if (outputValue == JSVAL_VOID || type == JSTYPE_FUNCTION || type == JSTYPE_XML)
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continue;
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|
|
// output a comma unless this is the first member to write
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if (memberWritten && !scx->cb.append(',')) {
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ok = JS_FALSE;
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break;
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}
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memberWritten = JS_TRUE;
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if (!WriteIndent(cx, scx, scx->depth))
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return JS_FALSE;
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|
// Be careful below, this string is weakly rooted
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JSString *s = js_ValueToString(cx, key);
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|
if (!s) {
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ok = JS_FALSE;
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break;
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}
|
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const jschar *chars;
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size_t length;
|
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s->getCharsAndLength(chars, length);
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ok = write_string(cx, scx->cb, chars, length);
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if (!ok)
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break;
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ok = scx->cb.append(':');
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if (!ok)
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break;
|
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ok = Str(cx, id, obj, scx, &outputValue, false);
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if (!ok)
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break;
|
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|
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} while (ok);
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|
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if (iterObj) {
|
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// Always close the iterator, but make sure not to stomp on OK
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JS_ASSERT(OBJECT_TO_JSVAL(iterObj) == *keySource);
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ok &= js_CloseIterator(cx, *keySource);
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}
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|
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if (!ok)
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return JS_FALSE;
|
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|
|
if (memberWritten && !WriteIndent(cx, scx, scx->depth - 1))
|
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return JS_FALSE;
|
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|
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return scx->cb.append('}');
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}
|
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|
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static JSBool
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JA(JSContext *cx, jsval *vp, StringifyContext *scx)
|
|
{
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JSObject *obj = JSVAL_TO_OBJECT(*vp);
|
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|
|
if (!scx->cb.append('['))
|
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return JS_FALSE;
|
|
|
|
jsuint length;
|
|
if (!js_GetLengthProperty(cx, obj, &length))
|
|
return JS_FALSE;
|
|
|
|
jsval outputValue = JSVAL_NULL;
|
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JSAutoTempValueRooter tvr(cx, 1, &outputValue);
|
|
|
|
jsid id;
|
|
jsuint i;
|
|
for (i = 0; i < length; i++) {
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id = INT_TO_JSID(i);
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|
|
|
if (!obj->getProperty(cx, id, &outputValue))
|
|
return JS_FALSE;
|
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|
|
if (!Str(cx, id, obj, scx, &outputValue))
|
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return JS_FALSE;
|
|
|
|
if (outputValue == JSVAL_VOID) {
|
|
if (!js_AppendLiteral(scx->cb, "null"))
|
|
return JS_FALSE;
|
|
}
|
|
|
|
if (i < length - 1) {
|
|
if (!scx->cb.append(','))
|
|
return JS_FALSE;
|
|
if (!WriteIndent(cx, scx, scx->depth))
|
|
return JS_FALSE;
|
|
}
|
|
}
|
|
|
|
if (length != 0 && !WriteIndent(cx, scx, scx->depth - 1))
|
|
return JS_FALSE;
|
|
|
|
return scx->cb.append(']');
|
|
}
|
|
|
|
static JSBool
|
|
CallReplacerFunction(JSContext *cx, jsid id, JSObject *holder, StringifyContext *scx, jsval *vp)
|
|
{
|
|
if (scx->replacer && js_IsCallable(scx->replacer, cx)) {
|
|
jsval vec[2] = {ID_TO_VALUE(id), *vp};
|
|
if (!JS_CallFunctionValue(cx, holder, OBJECT_TO_JSVAL(scx->replacer), 2, vec, vp))
|
|
return JS_FALSE;
|
|
}
|
|
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
Str(JSContext *cx, jsid id, JSObject *holder, StringifyContext *scx, jsval *vp, bool callReplacer)
|
|
{
|
|
JS_CHECK_RECURSION(cx, return JS_FALSE);
|
|
|
|
if (!holder->getProperty(cx, id, vp))
|
|
return JS_FALSE;
|
|
|
|
if (!JSVAL_IS_PRIMITIVE(*vp) && !js_TryJSON(cx, vp))
|
|
return JS_FALSE;
|
|
|
|
if (callReplacer && !CallReplacerFunction(cx, id, holder, scx, vp))
|
|
return JS_FALSE;
|
|
|
|
// catches string and number objects with no toJSON
|
|
if (!JSVAL_IS_PRIMITIVE(*vp)) {
|
|
JSClass *clasp = OBJ_GET_CLASS(cx, JSVAL_TO_OBJECT(*vp));
|
|
if (clasp == &js_StringClass || clasp == &js_NumberClass)
|
|
*vp = JSVAL_TO_OBJECT(*vp)->fslots[JSSLOT_PRIMITIVE_THIS];
|
|
}
|
|
|
|
if (JSVAL_IS_STRING(*vp)) {
|
|
const jschar *chars;
|
|
size_t length;
|
|
JSVAL_TO_STRING(*vp)->getCharsAndLength(chars, length);
|
|
return write_string(cx, scx->cb, chars, length);
|
|
}
|
|
|
|
if (JSVAL_IS_NULL(*vp)) {
|
|
return js_AppendLiteral(scx->cb, "null");
|
|
}
|
|
|
|
if (JSVAL_IS_BOOLEAN(*vp)) {
|
|
return JSVAL_TO_BOOLEAN(*vp) ? js_AppendLiteral(scx->cb, "true")
|
|
: js_AppendLiteral(scx->cb, "false");
|
|
}
|
|
|
|
if (JSVAL_IS_NUMBER(*vp)) {
|
|
if (JSVAL_IS_DOUBLE(*vp)) {
|
|
jsdouble d = *JSVAL_TO_DOUBLE(*vp);
|
|
if (!JSDOUBLE_IS_FINITE(d))
|
|
return js_AppendLiteral(scx->cb, "null");
|
|
}
|
|
|
|
char numBuf[DTOSTR_STANDARD_BUFFER_SIZE], *numStr;
|
|
jsdouble d = JSVAL_IS_INT(*vp) ? jsdouble(JSVAL_TO_INT(*vp)) : *JSVAL_TO_DOUBLE(*vp);
|
|
numStr = JS_dtostr(numBuf, sizeof numBuf, DTOSTR_STANDARD, 0, d);
|
|
if (!numStr) {
|
|
JS_ReportOutOfMemory(cx);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
jschar dstr[DTOSTR_STANDARD_BUFFER_SIZE];
|
|
size_t dbufSize = DTOSTR_STANDARD_BUFFER_SIZE;
|
|
if (!js_InflateStringToBuffer(cx, numStr, strlen(numStr), dstr, &dbufSize))
|
|
return JS_FALSE;
|
|
|
|
return scx->cb.append(dstr, dbufSize);
|
|
}
|
|
|
|
if (JSVAL_IS_OBJECT(*vp) && !VALUE_IS_FUNCTION(cx, *vp) && !VALUE_IS_XML(cx, *vp)) {
|
|
JSBool ok;
|
|
|
|
scx->depth++;
|
|
ok = (JS_IsArrayObject(cx, JSVAL_TO_OBJECT(*vp)) ? JA : JO)(cx, vp, scx);
|
|
scx->depth--;
|
|
|
|
return ok;
|
|
}
|
|
|
|
*vp = JSVAL_VOID;
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
InitializeGap(JSContext *cx, jsval space, JSCharBuffer &cb)
|
|
{
|
|
if (!JSVAL_IS_PRIMITIVE(space)) {
|
|
JSClass *clasp = OBJ_GET_CLASS(cx, JSVAL_TO_OBJECT(space));
|
|
if (clasp == &js_StringClass || clasp == &js_NumberClass)
|
|
return js_ValueToCharBuffer(cx, space, cb);
|
|
}
|
|
|
|
if (JSVAL_IS_STRING(space))
|
|
return js_ValueToCharBuffer(cx, space, cb);
|
|
|
|
if (JSVAL_IS_NUMBER(space)) {
|
|
jsdouble d = JSVAL_IS_INT(space)
|
|
? JSVAL_TO_INT(space)
|
|
: js_DoubleToInteger(*JSVAL_TO_DOUBLE(space));
|
|
d = JS_MIN(10, d);
|
|
if (d >= 1 && !cb.appendN(' ', uint32(d)))
|
|
return JS_FALSE;
|
|
}
|
|
|
|
return JS_TRUE;
|
|
}
|
|
|
|
JSBool
|
|
js_Stringify(JSContext *cx, jsval *vp, JSObject *replacer, jsval space,
|
|
JSCharBuffer &cb)
|
|
{
|
|
// XXX stack
|
|
JSObject *stack = JS_NewArrayObject(cx, 0, NULL);
|
|
if (!stack)
|
|
return JS_FALSE;
|
|
|
|
StringifyContext scx(cx, cb, replacer);
|
|
if (!InitializeGap(cx, space, scx.gap))
|
|
return JS_FALSE;
|
|
|
|
JSObject *obj = js_NewObject(cx, &js_ObjectClass, NULL, NULL);
|
|
if (!obj)
|
|
return JS_FALSE;
|
|
|
|
if (!obj->defineProperty(cx, ATOM_TO_JSID(cx->runtime->atomState.emptyAtom),
|
|
*vp, NULL, NULL, JSPROP_ENUMERATE)) {
|
|
return JS_FALSE;
|
|
}
|
|
|
|
return Str(cx, ATOM_TO_JSID(cx->runtime->atomState.emptyAtom), obj, &scx, vp);
|
|
}
|
|
|
|
// helper to determine whether a character could be part of a number
|
|
static JSBool IsNumChar(jschar c)
|
|
{
|
|
return ((c <= '9' && c >= '0') || c == '.' || c == '-' || c == '+' || c == 'e' || c == 'E');
|
|
}
|
|
|
|
static JSBool HandleData(JSContext *cx, JSONParser *jp, JSONDataType type);
|
|
static JSBool PopState(JSContext *cx, JSONParser *jp);
|
|
|
|
static JSBool
|
|
DestroyIdArrayOnError(JSContext *cx, JSIdArray *ida) {
|
|
JS_DestroyIdArray(cx, ida);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
static JSBool
|
|
Walk(JSContext *cx, jsid id, JSObject *holder, jsval reviver, jsval *vp)
|
|
{
|
|
JS_CHECK_RECURSION(cx, return JS_FALSE);
|
|
|
|
if (!holder->getProperty(cx, id, vp))
|
|
return JS_FALSE;
|
|
|
|
JSObject *obj;
|
|
|
|
if (!JSVAL_IS_PRIMITIVE(*vp) && !js_IsCallable(obj = JSVAL_TO_OBJECT(*vp), cx)) {
|
|
jsval propValue = JSVAL_NULL;
|
|
JSAutoTempValueRooter tvr(cx, 1, &propValue);
|
|
|
|
if(OBJ_IS_ARRAY(cx, obj)) {
|
|
jsuint length = 0;
|
|
if (!js_GetLengthProperty(cx, obj, &length))
|
|
return JS_FALSE;
|
|
|
|
for (jsuint i = 0; i < length; i++) {
|
|
jsid index;
|
|
if (!js_IndexToId(cx, i, &index))
|
|
return JS_FALSE;
|
|
|
|
if (!Walk(cx, index, obj, reviver, &propValue))
|
|
return JS_FALSE;
|
|
|
|
if (!obj->defineProperty(cx, index, propValue, NULL, NULL, JSPROP_ENUMERATE))
|
|
return JS_FALSE;
|
|
}
|
|
} else {
|
|
JSIdArray *ida = JS_Enumerate(cx, obj);
|
|
if (!ida)
|
|
return JS_FALSE;
|
|
|
|
JSAutoTempValueRooter idaroot(cx, JS_ARRAY_LENGTH(ida), (jsval*)ida);
|
|
|
|
for(jsint i = 0; i < ida->length; i++) {
|
|
jsid idName = ida->vector[i];
|
|
if (!Walk(cx, idName, obj, reviver, &propValue))
|
|
return DestroyIdArrayOnError(cx, ida);
|
|
if (propValue == JSVAL_VOID) {
|
|
if (!js_DeleteProperty(cx, obj, idName, &propValue))
|
|
return DestroyIdArrayOnError(cx, ida);
|
|
} else {
|
|
if (!obj->defineProperty(cx, idName, propValue, NULL, NULL, JSPROP_ENUMERATE))
|
|
return DestroyIdArrayOnError(cx, ida);
|
|
}
|
|
}
|
|
|
|
JS_DestroyIdArray(cx, ida);
|
|
}
|
|
}
|
|
|
|
// return reviver.call(holder, key, value);
|
|
jsval value = *vp;
|
|
JSString *key = js_ValueToString(cx, ID_TO_VALUE(id));
|
|
if (!key)
|
|
return JS_FALSE;
|
|
|
|
jsval vec[2] = {STRING_TO_JSVAL(key), value};
|
|
jsval reviverResult;
|
|
if (!JS_CallFunctionValue(cx, holder, reviver, 2, vec, &reviverResult))
|
|
return JS_FALSE;
|
|
|
|
*vp = reviverResult;
|
|
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
Revive(JSContext *cx, jsval reviver, jsval *vp)
|
|
{
|
|
|
|
JSObject *obj = js_NewObject(cx, &js_ObjectClass, NULL, NULL);
|
|
if (!obj)
|
|
return JS_FALSE;
|
|
|
|
jsval v = OBJECT_TO_JSVAL(obj);
|
|
JSAutoTempValueRooter tvr(cx, 1, &v);
|
|
if (!obj->defineProperty(cx, ATOM_TO_JSID(cx->runtime->atomState.emptyAtom),
|
|
*vp, NULL, NULL, JSPROP_ENUMERATE)) {
|
|
return JS_FALSE;
|
|
}
|
|
|
|
return Walk(cx, ATOM_TO_JSID(cx->runtime->atomState.emptyAtom), obj, reviver, vp);
|
|
}
|
|
|
|
JSONParser *
|
|
js_BeginJSONParse(JSContext *cx, jsval *rootVal)
|
|
{
|
|
if (!cx)
|
|
return NULL;
|
|
|
|
JSObject *arr = js_NewArrayObject(cx, 0, NULL);
|
|
if (!arr)
|
|
return NULL;
|
|
|
|
JSONParser *jp = cx->create<JSONParser>(cx);
|
|
if (!jp)
|
|
return NULL;
|
|
|
|
jp->objectStack = arr;
|
|
if (!js_AddRoot(cx, &jp->objectStack, "JSON parse stack"))
|
|
goto bad;
|
|
|
|
jp->statep = jp->stateStack;
|
|
*jp->statep = JSON_PARSE_STATE_INIT;
|
|
jp->rootVal = rootVal;
|
|
|
|
return jp;
|
|
|
|
bad:
|
|
js_FinishJSONParse(cx, jp, JSVAL_NULL);
|
|
return NULL;
|
|
}
|
|
|
|
JSBool
|
|
js_FinishJSONParse(JSContext *cx, JSONParser *jp, jsval reviver)
|
|
{
|
|
if (!jp)
|
|
return JS_TRUE;
|
|
|
|
JSBool early_ok = JS_TRUE;
|
|
|
|
// Check for unprocessed primitives at the root. This doesn't happen for
|
|
// strings because a closing quote triggers value processing.
|
|
if ((jp->statep - jp->stateStack) == 1) {
|
|
if (*jp->statep == JSON_PARSE_STATE_KEYWORD) {
|
|
early_ok = HandleData(cx, jp, JSON_DATA_KEYWORD);
|
|
if (early_ok)
|
|
PopState(cx, jp);
|
|
} else if (*jp->statep == JSON_PARSE_STATE_NUMBER) {
|
|
early_ok = HandleData(cx, jp, JSON_DATA_NUMBER);
|
|
if (early_ok)
|
|
PopState(cx, jp);
|
|
}
|
|
}
|
|
|
|
/* This internal API is infallible, in spite of its JSBool return type. */
|
|
js_RemoveRoot(cx->runtime, &jp->objectStack);
|
|
|
|
JSBool ok = *jp->statep == JSON_PARSE_STATE_FINISHED;
|
|
jsval *vp = jp->rootVal;
|
|
|
|
cx->destroy(jp);
|
|
|
|
if (!early_ok)
|
|
return JS_FALSE;
|
|
|
|
if (!ok) {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
if (!JSVAL_IS_PRIMITIVE(reviver) && js_IsCallable(JSVAL_TO_OBJECT(reviver), cx))
|
|
ok = Revive(cx, reviver, vp);
|
|
|
|
return ok;
|
|
}
|
|
|
|
static JSBool
|
|
PushState(JSContext *cx, JSONParser *jp, JSONParserState state)
|
|
{
|
|
if (*jp->statep == JSON_PARSE_STATE_FINISHED) {
|
|
// extra input
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
jp->statep++;
|
|
if ((uint32)(jp->statep - jp->stateStack) >= JS_ARRAY_LENGTH(jp->stateStack)) {
|
|
// too deep
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
*jp->statep = state;
|
|
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
PopState(JSContext *cx, JSONParser *jp)
|
|
{
|
|
jp->statep--;
|
|
if (jp->statep < jp->stateStack) {
|
|
jp->statep = jp->stateStack;
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
if (*jp->statep == JSON_PARSE_STATE_INIT)
|
|
*jp->statep = JSON_PARSE_STATE_FINISHED;
|
|
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
PushValue(JSContext *cx, JSONParser *jp, JSObject *parent, jsval value)
|
|
{
|
|
JSBool ok;
|
|
if (OBJ_IS_ARRAY(cx, parent)) {
|
|
jsuint len;
|
|
ok = js_GetLengthProperty(cx, parent, &len);
|
|
if (ok) {
|
|
jsid index;
|
|
if (!js_IndexToId(cx, len, &index))
|
|
return JS_FALSE;
|
|
ok = parent->defineProperty(cx, index, value, NULL, NULL, JSPROP_ENUMERATE);
|
|
}
|
|
} else {
|
|
ok = JS_DefineUCProperty(cx, parent, jp->objectKey.begin(),
|
|
jp->objectKey.length(), value,
|
|
NULL, NULL, JSPROP_ENUMERATE);
|
|
jp->objectKey.clear();
|
|
}
|
|
|
|
return ok;
|
|
}
|
|
|
|
static JSBool
|
|
PushObject(JSContext *cx, JSONParser *jp, JSObject *obj)
|
|
{
|
|
jsuint len;
|
|
if (!js_GetLengthProperty(cx, jp->objectStack, &len))
|
|
return JS_FALSE;
|
|
if (len >= JSON_MAX_DEPTH) {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
jsval v = OBJECT_TO_JSVAL(obj);
|
|
JSAutoTempValueRooter tvr(cx, v);
|
|
|
|
// Check if this is the root object
|
|
if (len == 0) {
|
|
*jp->rootVal = v;
|
|
// This property must be enumerable to keep the array dense
|
|
if (!jp->objectStack->defineProperty(cx, INT_TO_JSID(0), *jp->rootVal,
|
|
NULL, NULL, JSPROP_ENUMERATE)) {
|
|
return JS_FALSE;
|
|
}
|
|
return JS_TRUE;
|
|
}
|
|
|
|
jsval p;
|
|
if (!jp->objectStack->getProperty(cx, INT_TO_JSID(len - 1), &p))
|
|
return JS_FALSE;
|
|
|
|
JS_ASSERT(JSVAL_IS_OBJECT(p));
|
|
JSObject *parent = JSVAL_TO_OBJECT(p);
|
|
if (!PushValue(cx, jp, parent, v))
|
|
return JS_FALSE;
|
|
|
|
// This property must be enumerable to keep the array dense
|
|
if (!jp->objectStack->defineProperty(cx, INT_TO_JSID(len), v,
|
|
NULL, NULL, JSPROP_ENUMERATE)) {
|
|
return JS_FALSE;
|
|
}
|
|
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
OpenObject(JSContext *cx, JSONParser *jp)
|
|
{
|
|
JSObject *obj = js_NewObject(cx, &js_ObjectClass, NULL, NULL);
|
|
if (!obj)
|
|
return JS_FALSE;
|
|
|
|
return PushObject(cx, jp, obj);
|
|
}
|
|
|
|
static JSBool
|
|
OpenArray(JSContext *cx, JSONParser *jp)
|
|
{
|
|
// Add an array to an existing array or object
|
|
JSObject *arr = js_NewArrayObject(cx, 0, NULL);
|
|
if (!arr)
|
|
return JS_FALSE;
|
|
|
|
return PushObject(cx, jp, arr);
|
|
}
|
|
|
|
static JSBool
|
|
CloseObject(JSContext *cx, JSONParser *jp)
|
|
{
|
|
jsuint len;
|
|
if (!js_GetLengthProperty(cx, jp->objectStack, &len))
|
|
return JS_FALSE;
|
|
if (!js_SetLengthProperty(cx, jp->objectStack, len - 1))
|
|
return JS_FALSE;
|
|
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
CloseArray(JSContext *cx, JSONParser *jp)
|
|
{
|
|
return CloseObject(cx, jp);
|
|
}
|
|
|
|
static JSBool
|
|
PushPrimitive(JSContext *cx, JSONParser *jp, jsval value)
|
|
{
|
|
JSAutoTempValueRooter tvr(cx, 1, &value);
|
|
|
|
jsuint len;
|
|
if (!js_GetLengthProperty(cx, jp->objectStack, &len))
|
|
return JS_FALSE;
|
|
|
|
if (len > 0) {
|
|
jsval o;
|
|
if (!jp->objectStack->getProperty(cx, INT_TO_JSID(len - 1), &o))
|
|
return JS_FALSE;
|
|
|
|
JS_ASSERT(!JSVAL_IS_PRIMITIVE(o));
|
|
return PushValue(cx, jp, JSVAL_TO_OBJECT(o), value);
|
|
}
|
|
|
|
// root value must be primitive
|
|
*jp->rootVal = value;
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
HandleNumber(JSContext *cx, JSONParser *jp, const jschar *buf, uint32 len)
|
|
{
|
|
const jschar *ep;
|
|
double val;
|
|
if (!js_strtod(cx, buf, buf + len, &ep, &val))
|
|
return JS_FALSE;
|
|
if (ep != buf + len) {
|
|
// bad number input
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
jsval numVal;
|
|
if (!JS_NewNumberValue(cx, val, &numVal))
|
|
return JS_FALSE;
|
|
|
|
return PushPrimitive(cx, jp, numVal);
|
|
}
|
|
|
|
static JSBool
|
|
HandleString(JSContext *cx, JSONParser *jp, const jschar *buf, uint32 len)
|
|
{
|
|
JSString *str = js_NewStringCopyN(cx, buf, len);
|
|
if (!str)
|
|
return JS_FALSE;
|
|
|
|
return PushPrimitive(cx, jp, STRING_TO_JSVAL(str));
|
|
}
|
|
|
|
static JSBool
|
|
HandleKeyword(JSContext *cx, JSONParser *jp, const jschar *buf, uint32 len)
|
|
{
|
|
jsval keyword;
|
|
JSTokenType tt = js_CheckKeyword(buf, len);
|
|
if (tt != TOK_PRIMARY) {
|
|
// bad keyword
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
if (buf[0] == 'n') {
|
|
keyword = JSVAL_NULL;
|
|
} else if (buf[0] == 't') {
|
|
keyword = JSVAL_TRUE;
|
|
} else if (buf[0] == 'f') {
|
|
keyword = JSVAL_FALSE;
|
|
} else {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
return PushPrimitive(cx, jp, keyword);
|
|
}
|
|
|
|
static JSBool
|
|
HandleData(JSContext *cx, JSONParser *jp, JSONDataType type)
|
|
{
|
|
JSBool ok;
|
|
|
|
switch (type) {
|
|
case JSON_DATA_STRING:
|
|
ok = HandleString(cx, jp, jp->buffer.begin(), jp->buffer.length());
|
|
break;
|
|
|
|
case JSON_DATA_KEYSTRING:
|
|
ok = jp->objectKey.append(jp->buffer.begin(), jp->buffer.end());
|
|
break;
|
|
|
|
case JSON_DATA_NUMBER:
|
|
ok = HandleNumber(cx, jp, jp->buffer.begin(), jp->buffer.length());
|
|
break;
|
|
|
|
default:
|
|
JS_ASSERT(type == JSON_DATA_KEYWORD);
|
|
ok = HandleKeyword(cx, jp, jp->buffer.begin(), jp->buffer.length());
|
|
break;
|
|
}
|
|
|
|
if (ok)
|
|
jp->buffer.clear();
|
|
return ok;
|
|
}
|
|
|
|
JSBool
|
|
js_ConsumeJSONText(JSContext *cx, JSONParser *jp, const jschar *data, uint32 len)
|
|
{
|
|
uint32 i;
|
|
|
|
if (*jp->statep == JSON_PARSE_STATE_INIT) {
|
|
PushState(cx, jp, JSON_PARSE_STATE_VALUE);
|
|
}
|
|
|
|
for (i = 0; i < len; i++) {
|
|
jschar c = data[i];
|
|
switch (*jp->statep) {
|
|
case JSON_PARSE_STATE_VALUE:
|
|
if (c == ']') {
|
|
// empty array
|
|
if (!PopState(cx, jp))
|
|
return JS_FALSE;
|
|
|
|
if (*jp->statep != JSON_PARSE_STATE_ARRAY) {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
if (!CloseArray(cx, jp) || !PopState(cx, jp))
|
|
return JS_FALSE;
|
|
|
|
break;
|
|
}
|
|
|
|
if (c == '}') {
|
|
// we should only find these in OBJECT_KEY state
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
if (c == '"') {
|
|
*jp->statep = JSON_PARSE_STATE_STRING;
|
|
break;
|
|
}
|
|
|
|
if (IsNumChar(c)) {
|
|
*jp->statep = JSON_PARSE_STATE_NUMBER;
|
|
if (!jp->buffer.append(c))
|
|
return JS_FALSE;
|
|
break;
|
|
}
|
|
|
|
if (JS7_ISLET(c)) {
|
|
*jp->statep = JSON_PARSE_STATE_KEYWORD;
|
|
if (!jp->buffer.append(c))
|
|
return JS_FALSE;
|
|
break;
|
|
}
|
|
|
|
// fall through in case the value is an object or array
|
|
case JSON_PARSE_STATE_OBJECT_VALUE:
|
|
if (c == '{') {
|
|
*jp->statep = JSON_PARSE_STATE_OBJECT;
|
|
if (!OpenObject(cx, jp) || !PushState(cx, jp, JSON_PARSE_STATE_OBJECT_PAIR))
|
|
return JS_FALSE;
|
|
} else if (c == '[') {
|
|
*jp->statep = JSON_PARSE_STATE_ARRAY;
|
|
if (!OpenArray(cx, jp) || !PushState(cx, jp, JSON_PARSE_STATE_VALUE))
|
|
return JS_FALSE;
|
|
} else if (!JS_ISXMLSPACE(c)) {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
break;
|
|
|
|
case JSON_PARSE_STATE_OBJECT:
|
|
if (c == '}') {
|
|
if (!CloseObject(cx, jp) || !PopState(cx, jp))
|
|
return JS_FALSE;
|
|
} else if (c == ',') {
|
|
if (!PushState(cx, jp, JSON_PARSE_STATE_OBJECT_PAIR))
|
|
return JS_FALSE;
|
|
} else if (c == ']' || !JS_ISXMLSPACE(c)) {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
break;
|
|
|
|
case JSON_PARSE_STATE_ARRAY :
|
|
if (c == ']') {
|
|
if (!CloseArray(cx, jp) || !PopState(cx, jp))
|
|
return JS_FALSE;
|
|
} else if (c == ',') {
|
|
if (!PushState(cx, jp, JSON_PARSE_STATE_VALUE))
|
|
return JS_FALSE;
|
|
} else if (!JS_ISXMLSPACE(c)) {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
break;
|
|
|
|
case JSON_PARSE_STATE_OBJECT_PAIR :
|
|
if (c == '"') {
|
|
// we want to be waiting for a : when the string has been read
|
|
*jp->statep = JSON_PARSE_STATE_OBJECT_IN_PAIR;
|
|
if (!PushState(cx, jp, JSON_PARSE_STATE_STRING))
|
|
return JS_FALSE;
|
|
} else if (c == '}') {
|
|
// pop off the object pair state and the object state
|
|
if (!CloseObject(cx, jp) || !PopState(cx, jp) || !PopState(cx, jp))
|
|
return JS_FALSE;
|
|
} else if (c == ']' || !JS_ISXMLSPACE(c)) {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
break;
|
|
|
|
case JSON_PARSE_STATE_OBJECT_IN_PAIR:
|
|
if (c == ':') {
|
|
*jp->statep = JSON_PARSE_STATE_VALUE;
|
|
} else if (!JS_ISXMLSPACE(c)) {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
break;
|
|
|
|
case JSON_PARSE_STATE_STRING:
|
|
if (c == '"') {
|
|
if (!PopState(cx, jp))
|
|
return JS_FALSE;
|
|
JSONDataType jdt;
|
|
if (*jp->statep == JSON_PARSE_STATE_OBJECT_IN_PAIR) {
|
|
jdt = JSON_DATA_KEYSTRING;
|
|
} else {
|
|
jdt = JSON_DATA_STRING;
|
|
}
|
|
if (!HandleData(cx, jp, jdt))
|
|
return JS_FALSE;
|
|
} else if (c == '\\') {
|
|
*jp->statep = JSON_PARSE_STATE_STRING_ESCAPE;
|
|
} else {
|
|
if (!jp->buffer.append(c))
|
|
return JS_FALSE;
|
|
}
|
|
break;
|
|
|
|
case JSON_PARSE_STATE_STRING_ESCAPE:
|
|
switch (c) {
|
|
case '"':
|
|
case '\\':
|
|
case '/':
|
|
break;
|
|
case 'b' : c = '\b'; break;
|
|
case 'f' : c = '\f'; break;
|
|
case 'n' : c = '\n'; break;
|
|
case 'r' : c = '\r'; break;
|
|
case 't' : c = '\t'; break;
|
|
default :
|
|
if (c == 'u') {
|
|
jp->numHex = 0;
|
|
jp->hexChar = 0;
|
|
*jp->statep = JSON_PARSE_STATE_STRING_HEX;
|
|
continue;
|
|
} else {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
}
|
|
|
|
if (!jp->buffer.append(c))
|
|
return JS_FALSE;
|
|
*jp->statep = JSON_PARSE_STATE_STRING;
|
|
break;
|
|
|
|
case JSON_PARSE_STATE_STRING_HEX:
|
|
if (('0' <= c) && (c <= '9')) {
|
|
jp->hexChar = (jp->hexChar << 4) | (c - '0');
|
|
} else if (('a' <= c) && (c <= 'f')) {
|
|
jp->hexChar = (jp->hexChar << 4) | (c - 'a' + 0x0a);
|
|
} else if (('A' <= c) && (c <= 'F')) {
|
|
jp->hexChar = (jp->hexChar << 4) | (c - 'A' + 0x0a);
|
|
} else {
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
if (++(jp->numHex) == 4) {
|
|
if (!jp->buffer.append(jp->hexChar))
|
|
return JS_FALSE;
|
|
jp->hexChar = 0;
|
|
jp->numHex = 0;
|
|
*jp->statep = JSON_PARSE_STATE_STRING;
|
|
}
|
|
break;
|
|
|
|
case JSON_PARSE_STATE_KEYWORD:
|
|
if (JS7_ISLET(c)) {
|
|
if (!jp->buffer.append(c))
|
|
return JS_FALSE;
|
|
} else {
|
|
// this character isn't part of the keyword, process it again
|
|
i--;
|
|
if (!PopState(cx, jp))
|
|
return JS_FALSE;
|
|
|
|
if (!HandleData(cx, jp, JSON_DATA_KEYWORD))
|
|
return JS_FALSE;
|
|
}
|
|
break;
|
|
|
|
case JSON_PARSE_STATE_NUMBER:
|
|
if (IsNumChar(c)) {
|
|
if (!jp->buffer.append(c))
|
|
return JS_FALSE;
|
|
} else {
|
|
// this character isn't part of the number, process it again
|
|
i--;
|
|
if (!PopState(cx, jp))
|
|
return JS_FALSE;
|
|
if (!HandleData(cx, jp, JSON_DATA_NUMBER))
|
|
return JS_FALSE;
|
|
}
|
|
break;
|
|
|
|
case JSON_PARSE_STATE_FINISHED:
|
|
if (!JS_ISXMLSPACE(c)) {
|
|
// extra input
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_JSON_BAD_PARSE);
|
|
return JS_FALSE;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
JS_NOT_REACHED("Invalid JSON parser state");
|
|
}
|
|
}
|
|
|
|
return JS_TRUE;
|
|
}
|
|
|
|
#if JS_HAS_TOSOURCE
|
|
static JSBool
|
|
json_toSource(JSContext *cx, uintN argc, jsval *vp)
|
|
{
|
|
*vp = ATOM_KEY(CLASS_ATOM(cx, JSON));
|
|
return JS_TRUE;
|
|
}
|
|
#endif
|
|
|
|
static JSFunctionSpec json_static_methods[] = {
|
|
#if JS_HAS_TOSOURCE
|
|
JS_FN(js_toSource_str, json_toSource, 0, 0),
|
|
#endif
|
|
JS_FN("parse", js_json_parse, 1, 0),
|
|
JS_FN("stringify", js_json_stringify, 1, 0),
|
|
JS_FS_END
|
|
};
|
|
|
|
JSObject *
|
|
js_InitJSONClass(JSContext *cx, JSObject *obj)
|
|
{
|
|
JSObject *JSON;
|
|
|
|
JSON = JS_NewObject(cx, &js_JSONClass, NULL, obj);
|
|
if (!JSON)
|
|
return NULL;
|
|
if (!JS_DefineProperty(cx, obj, js_JSON_str, OBJECT_TO_JSVAL(JSON),
|
|
JS_PropertyStub, JS_PropertyStub, 0))
|
|
return NULL;
|
|
|
|
if (!JS_DefineFunctions(cx, JSON, json_static_methods))
|
|
return NULL;
|
|
|
|
return JSON;
|
|
}
|