v8/src/json-delay.js
christian.plesner.hansen@gmail.com 4a909a7a62 - When cloning maps to set the 'lazy loading' bit remember to clone
the properties as well.  This fixes some failing tests.
- Moved json parsing into native code.


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1789 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-04-24 12:45:29 +00:00

255 lines
7.2 KiB
JavaScript

// Copyright 2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS 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 COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
var $JSON = global.JSON;
function ParseJSONUnfiltered(text) {
var s = $String(text);
var f = %CompileString("(" + text + ")", -1, true);
return f();
}
function Revive(holder, name, reviver) {
var val = holder[name];
if (IS_OBJECT(val)) {
if (IS_ARRAY(val)) {
var length = val.length;
for (var i = 0; i < length; i++) {
var newElement = Revive(val, $String(i), reviver);
val[i] = newElement;
}
} else {
for (var p in val) {
if (ObjectHasOwnProperty.call(val, p)) {
var newElement = Revive(val, p, reviver);
if (IS_UNDEFINED(newElement)) {
delete val[p];
} else {
val[p] = newElement;
}
}
}
}
}
return reviver.call(holder, name, val);
}
function JSONParse(text, reviver) {
var unfiltered = ParseJSONUnfiltered(text);
if (IS_FUNCTION(reviver)) {
return Revive({'': unfiltered}, '', reviver);
} else {
return unfiltered;
}
}
var characterQuoteCache = {
'\"': '\\"',
'\\': '\\\\',
'/': '\\/',
'\b': '\\b',
'\f': '\\f',
'\n': '\\n',
'\r': '\\r',
'\t': '\\t',
'\x0B': '\\u000b'
};
function QuoteSingleJSONCharacter(c) {
if (c in characterQuoteCache)
return characterQuoteCache[c];
var charCode = c.charCodeAt(0);
var result;
if (charCode < 16) result = '\\u000';
else if (charCode < 256) result = '\\u00';
else if (charCode < 4096) result = '\\u0';
else result = '\\u';
result += charCode.toString(16);
characterQuoteCache[c] = result;
return result;
}
function QuoteJSONString(str) {
var quotable = /[\\\"\x00-\x1f\x80-\uffff]/g;
return '"' + str.replace(quotable, QuoteSingleJSONCharacter) + '"';
}
function StackContains(stack, val) {
var length = stack.length;
for (var i = 0; i < length; i++) {
if (stack[i] === val)
return true;
}
return false;
}
function SerializeArray(value, replacer, stack, indent, gap) {
if (StackContains(stack, value))
throw MakeTypeError('circular_structure', []);
stack.push(value);
var stepback = indent;
indent += gap;
var partial = [];
var len = value.length;
for (var i = 0; i < len; i++) {
var strP = JSONSerialize($String(i), value, replacer, stack,
indent, gap);
if (IS_UNDEFINED(strP))
strP = "null";
partial.push(strP);
}
var final;
if (gap == "") {
final = "[" + partial.join(",") + "]";
} else if (partial.length > 0) {
var separator = ",\n" + indent;
final = "[\n" + indent + partial.join(separator) + "\n" +
stepback + "]";
} else {
final = "[]";
}
stack.pop();
return final;
}
function SerializeObject(value, replacer, stack, indent, gap) {
if (StackContains(stack, value))
throw MakeTypeError('circular_structure', []);
stack.push(value);
var stepback = indent;
indent += gap;
var partial = [];
if (IS_ARRAY(replacer)) {
var length = replacer.length;
for (var i = 0; i < length; i++) {
if (ObjectHasOwnProperty.call(replacer, i)) {
var p = replacer[i];
var strP = JSONSerialize(p, value, replacer, stack, indent, gap);
if (!IS_UNDEFINED(strP)) {
var member = QuoteJSONString(p) + ":";
if (gap != "") member += " ";
member += strP;
partial.push(member);
}
}
}
} else {
for (var p in value) {
if (ObjectHasOwnProperty.call(value, p)) {
var strP = JSONSerialize(p, value, replacer, stack, indent, gap);
if (!IS_UNDEFINED(strP)) {
var member = QuoteJSONString(p) + ":";
if (gap != "") member += " ";
member += strP;
partial.push(member);
}
}
}
}
var final;
if (gap == "") {
final = "{" + partial.join(",") + "}";
} else if (partial.length > 0) {
var separator = ",\n" + indent;
final = "{\n" + indent + partial.join(separator) + "\n" +
stepback + "}";
} else {
final = "{}";
}
stack.pop();
return final;
}
function JSONSerialize(key, holder, replacer, stack, indent, gap) {
var value = holder[key];
if (IS_OBJECT(value) && value) {
var toJSON = value.toJSON;
if (IS_FUNCTION(toJSON))
value = toJSON.call(value, key);
}
if (IS_FUNCTION(replacer))
value = replacer.call(holder, key, value);
// Unwrap value if necessary
if (IS_OBJECT(value)) {
if (IS_NUMBER_WRAPPER(value)) {
value = $Number(value);
} else if (IS_STRING_WRAPPER(value)) {
value = $String(value);
}
}
switch (typeof value) {
case "string":
return QuoteJSONString(value);
case "object":
if (!value) {
return "null";
} else if (IS_ARRAY(value)) {
return SerializeArray(value, replacer, stack, indent, gap);
} else {
return SerializeObject(value, replacer, stack, indent, gap);
}
case "number":
return $isFinite(value) ? $String(value) : "null";
case "boolean":
return value ? "true" : "false";
}
}
function JSONStringify(value, replacer, space) {
var stack = [];
var indent = "";
if (IS_OBJECT(space)) {
// Unwrap 'space' if it is wrapped
if (IS_NUMBER_WRAPPER(space)) {
space = $Number(space);
} else if (IS_STRING_WRAPPER(space)) {
space = $String(space);
}
}
var gap;
if (IS_NUMBER(space)) {
space = $Math.min(space, 100);
gap = "";
for (var i = 0; i < space; i++)
gap += " ";
} else if (IS_STRING(space)) {
gap = space;
} else {
gap = "";
}
return JSONSerialize('', {'': value}, replacer, stack, indent, gap);
}
function SetupJSON() {
InstallFunctions($JSON, DONT_ENUM, $Array(
"parse", JSONParse,
"stringify", JSONStringify
));
}
SetupJSON();