dd242e3fe1
Review URL: http://codereview.chromium.org/6335004 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6337 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
343 lines
10 KiB
JavaScript
343 lines
10 KiB
JavaScript
// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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var $JSON = global.JSON;
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function Revive(holder, name, reviver) {
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var val = holder[name];
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if (IS_OBJECT(val)) {
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if (IS_ARRAY(val)) {
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var length = val.length;
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for (var i = 0; i < length; i++) {
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var newElement = Revive(val, $String(i), reviver);
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val[i] = newElement;
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}
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} else {
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for (var p in val) {
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if (ObjectHasOwnProperty.call(val, p)) {
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var newElement = Revive(val, p, reviver);
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if (IS_UNDEFINED(newElement)) {
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delete val[p];
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} else {
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val[p] = newElement;
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}
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}
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}
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}
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}
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return reviver.call(holder, name, val);
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}
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function JSONParse(text, reviver) {
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var unfiltered = %ParseJson(TO_STRING_INLINE(text));
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if (IS_FUNCTION(reviver)) {
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return Revive({'': unfiltered}, '', reviver);
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} else {
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return unfiltered;
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}
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}
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function SerializeArray(value, replacer, stack, indent, gap) {
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if (!%PushIfAbsent(stack, value)) {
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throw MakeTypeError('circular_structure', []);
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}
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var stepback = indent;
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indent += gap;
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var partial = [];
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var len = value.length;
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for (var i = 0; i < len; i++) {
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var strP = JSONSerialize($String(i), value, replacer, stack,
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indent, gap);
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if (IS_UNDEFINED(strP)) {
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strP = "null";
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}
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partial.push(strP);
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}
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var final;
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if (gap == "") {
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final = "[" + partial.join(",") + "]";
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} else if (partial.length > 0) {
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var separator = ",\n" + indent;
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final = "[\n" + indent + partial.join(separator) + "\n" +
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stepback + "]";
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} else {
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final = "[]";
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}
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stack.pop();
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return final;
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}
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function SerializeObject(value, replacer, stack, indent, gap) {
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if (!%PushIfAbsent(stack, value)) {
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throw MakeTypeError('circular_structure', []);
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}
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var stepback = indent;
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indent += gap;
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var partial = [];
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if (IS_ARRAY(replacer)) {
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var length = replacer.length;
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for (var i = 0; i < length; i++) {
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if (ObjectHasOwnProperty.call(replacer, i)) {
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var p = replacer[i];
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var strP = JSONSerialize(p, value, replacer, stack, indent, gap);
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if (!IS_UNDEFINED(strP)) {
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var member = %QuoteJSONString(p) + ":";
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if (gap != "") member += " ";
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member += strP;
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partial.push(member);
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}
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}
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}
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} else {
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for (var p in value) {
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if (ObjectHasOwnProperty.call(value, p)) {
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var strP = JSONSerialize(p, value, replacer, stack, indent, gap);
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if (!IS_UNDEFINED(strP)) {
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var member = %QuoteJSONString(p) + ":";
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if (gap != "") member += " ";
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member += strP;
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partial.push(member);
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}
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}
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}
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}
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var final;
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if (gap == "") {
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final = "{" + partial.join(",") + "}";
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} else if (partial.length > 0) {
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var separator = ",\n" + indent;
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final = "{\n" + indent + partial.join(separator) + "\n" +
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stepback + "}";
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} else {
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final = "{}";
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}
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stack.pop();
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return final;
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}
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function JSONSerialize(key, holder, replacer, stack, indent, gap) {
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var value = holder[key];
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if (IS_SPEC_OBJECT(value)) {
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var toJSON = value.toJSON;
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if (IS_FUNCTION(toJSON)) {
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value = %_CallFunction(value, key, toJSON);
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}
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}
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if (IS_FUNCTION(replacer)) {
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value = %_CallFunction(holder, key, value, replacer);
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}
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if (IS_STRING(value)) {
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return %QuoteJSONString(value);
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} else if (IS_NUMBER(value)) {
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return NUMBER_IS_FINITE(value) ? $String(value) : "null";
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} else if (IS_BOOLEAN(value)) {
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return value ? "true" : "false";
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} else if (IS_NULL(value)) {
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return "null";
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} else if (IS_SPEC_OBJECT(value) && !(typeof value == "function")) {
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// Non-callable object. If it's a primitive wrapper, it must be unwrapped.
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if (IS_ARRAY(value)) {
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return SerializeArray(value, replacer, stack, indent, gap);
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} else if (IS_NUMBER_WRAPPER(value)) {
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value = ToNumber(value);
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return NUMBER_IS_FINITE(value) ? ToString(value) : "null";
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} else if (IS_STRING_WRAPPER(value)) {
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return %QuoteJSONString(ToString(value));
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} else if (IS_BOOLEAN_WRAPPER(value)) {
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return %_ValueOf(value) ? "true" : "false";
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} else {
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return SerializeObject(value, replacer, stack, indent, gap);
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}
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}
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// Undefined or a callable object.
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return void 0;
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}
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function BasicSerializeArray(value, stack, builder) {
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var len = value.length;
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if (len == 0) {
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builder.push("[]");
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return;
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}
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if (!%PushIfAbsent(stack, value)) {
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throw MakeTypeError('circular_structure', []);
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}
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builder.push("[");
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var val = value[0];
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if (IS_STRING(val)) {
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// First entry is a string. Remaining entries are likely to be strings too.
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builder.push(%QuoteJSONString(val));
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for (var i = 1; i < len; i++) {
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val = value[i];
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if (IS_STRING(val)) {
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builder.push(%QuoteJSONStringComma(val));
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} else {
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builder.push(",");
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var before = builder.length;
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BasicJSONSerialize(i, value[i], stack, builder);
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if (before == builder.length) builder[before - 1] = ",null";
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}
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}
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} else if (IS_NUMBER(val)) {
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// First entry is a number. Remaining entries are likely to be numbers too.
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builder.push(NUMBER_IS_FINITE(val) ? %_NumberToString(val) : "null");
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for (var i = 1; i < len; i++) {
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builder.push(",");
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val = value[i];
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if (IS_NUMBER(val)) {
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builder.push(NUMBER_IS_FINITE(val)
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? %_NumberToString(val)
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: "null");
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} else {
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var before = builder.length;
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BasicJSONSerialize(i, value[i], stack, builder);
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if (before == builder.length) builder[before - 1] = ",null";
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}
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}
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} else {
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var before = builder.length;
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BasicJSONSerialize(0, val, stack, builder);
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if (before == builder.length) builder.push("null");
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for (var i = 1; i < len; i++) {
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builder.push(",");
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before = builder.length;
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val = value[i];
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BasicJSONSerialize(i, val, stack, builder);
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if (before == builder.length) builder[before - 1] = ",null";
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}
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}
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stack.pop();
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builder.push("]");
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}
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function BasicSerializeObject(value, stack, builder) {
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if (!%PushIfAbsent(stack, value)) {
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throw MakeTypeError('circular_structure', []);
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}
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builder.push("{");
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var first = true;
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for (var p in value) {
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if (%HasLocalProperty(value, p)) {
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if (!first) {
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builder.push(%QuoteJSONStringComma(p));
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} else {
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builder.push(%QuoteJSONString(p));
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}
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builder.push(":");
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var before = builder.length;
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BasicJSONSerialize(p, value[p], stack, builder);
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if (before == builder.length) {
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builder.pop();
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builder.pop();
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} else {
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first = false;
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}
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}
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}
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stack.pop();
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builder.push("}");
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}
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function BasicJSONSerialize(key, value, stack, builder) {
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if (IS_SPEC_OBJECT(value)) {
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var toJSON = value.toJSON;
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if (IS_FUNCTION(toJSON)) {
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value = %_CallFunction(value, ToString(key), toJSON);
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}
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}
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if (IS_STRING(value)) {
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builder.push(%QuoteJSONString(value));
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} else if (IS_NUMBER(value)) {
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builder.push(NUMBER_IS_FINITE(value) ? %_NumberToString(value) : "null");
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} else if (IS_BOOLEAN(value)) {
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builder.push(value ? "true" : "false");
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} else if (IS_NULL(value)) {
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builder.push("null");
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} else if (IS_SPEC_OBJECT(value) && !(typeof value == "function")) {
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// Value is a non-callable object.
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// Unwrap value if necessary
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if (IS_NUMBER_WRAPPER(value)) {
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value = ToNumber(value);
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builder.push(NUMBER_IS_FINITE(value) ? %_NumberToString(value) : "null");
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} else if (IS_STRING_WRAPPER(value)) {
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builder.push(%QuoteJSONString(ToString(value)));
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} else if (IS_BOOLEAN_WRAPPER(value)) {
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builder.push(%_ValueOf(value) ? "true" : "false");
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} else if (IS_ARRAY(value)) {
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BasicSerializeArray(value, stack, builder);
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} else {
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BasicSerializeObject(value, stack, builder);
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}
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}
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}
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function JSONStringify(value, replacer, space) {
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if (%_ArgumentsLength() == 1) {
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var builder = [];
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BasicJSONSerialize('', value, [], builder);
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if (builder.length == 0) return;
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var result = %_FastAsciiArrayJoin(builder, "");
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if (!IS_UNDEFINED(result)) return result;
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return %StringBuilderConcat(builder, builder.length, "");
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}
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if (IS_OBJECT(space)) {
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// Unwrap 'space' if it is wrapped
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if (IS_NUMBER_WRAPPER(space)) {
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space = ToNumber(space);
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} else if (IS_STRING_WRAPPER(space)) {
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space = ToString(space);
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}
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}
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var gap;
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if (IS_NUMBER(space)) {
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space = MathMax(0, MathMin(ToInteger(space), 10));
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gap = SubString(" ", 0, space);
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} else if (IS_STRING(space)) {
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if (space.length > 10) {
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gap = SubString(space, 0, 10);
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} else {
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gap = space;
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}
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} else {
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gap = "";
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}
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return JSONSerialize('', {'': value}, replacer, [], "", gap);
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}
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function SetupJSON() {
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InstallFunctions($JSON, DONT_ENUM, $Array(
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"parse", JSONParse,
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"stringify", JSONStringify
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));
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}
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SetupJSON();
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