Update to V8 with partial snapshots. This is taken from the partial_snapshot branch of V8.
diff --git a/src/json.js b/src/json.js
new file mode 100644
index 0000000..3e42d36
--- /dev/null
+++ b/src/json.js
@@ -0,0 +1,268 @@
+// 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, 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);
+ } else if (IS_BOOLEAN_WRAPPER(value)) {
+ value = $Boolean(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 = $Math.min(space, 10);
+ gap = "";
+ for (var i = 0; i < space; i++) {
+ gap += " ";
+ }
+ } else if (IS_STRING(space)) {
+ if (space.length > 10) {
+ gap = space.substring(0, 10);
+ } else {
+ gap = space;
+ }
+ } else {
+ gap = "";
+ }
+ return JSONSerialize('', {'': value}, replacer, stack, indent, gap);
+}
+
+function SetupJSON() {
+ InstallFunctions($JSON, DONT_ENUM, $Array(
+ "parse", JSONParse,
+ "stringify", JSONStringify
+ ));
+}
+
+SetupJSON();