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// 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 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, $String(i), reviver);
val[i] = newElement;
}
} else {
for (var p in val) {
if (%_CallFunction(val, p, ObjectHasOwnProperty)) {
var newElement = Revive(val, p, reviver);
if (IS_UNDEFINED(newElement)) {
delete val[p];
} else {
val[p] = newElement;
}
}
}
}
}
return reviver.call(holder, name, val);
}
function JSONParse(text, reviver) {
var unfiltered = %ParseJson(TO_STRING_INLINE(text));
if (IS_FUNCTION(reviver)) {
return Revive({'': unfiltered}, '', reviver);
} else {
return unfiltered;
}
}
function SerializeArray(value, replacer, stack, indent, gap) {
if (!%PushIfAbsent(stack, value)) {
throw MakeTypeError('circular_structure', []);
}
var stepback = indent;
indent += gap;
var partial = [];
var len = value.length;
for (var i = 0; i < len; i++) {
var strP = JSONSerialize($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 (!%PushIfAbsent(stack, value)) {
throw MakeTypeError('circular_structure', []);
}
var stepback = indent;
indent += gap;
var partial = [];
if (IS_ARRAY(replacer)) {
var length = replacer.length;
for (var i = 0; i < length; i++) {
if (%_CallFunction(replacer, i, ObjectHasOwnProperty)) {
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 (%_CallFunction(value, p, ObjectHasOwnProperty)) {
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_SPEC_OBJECT(value)) {
var toJSON = value.toJSON;
if (IS_FUNCTION(toJSON)) {
value = %_CallFunction(value, key, toJSON);
}
}
if (IS_FUNCTION(replacer)) {
value = %_CallFunction(holder, key, value, replacer);
}
if (IS_STRING(value)) {
return %QuoteJSONString(value);
} else if (IS_NUMBER(value)) {
return NUMBER_IS_FINITE(value) ? $String(value) : "null";
} else if (IS_BOOLEAN(value)) {
return value ? "true" : "false";
} else if (IS_NULL(value)) {
return "null";
} else if (IS_SPEC_OBJECT(value) && !(typeof value == "function")) {
// Non-callable object. If it's a primitive wrapper, it must be unwrapped.
if (IS_ARRAY(value)) {
return SerializeArray(value, replacer, stack, indent, gap);
} else if (IS_NUMBER_WRAPPER(value)) {
value = ToNumber(value);
return NUMBER_IS_FINITE(value) ? ToString(value) : "null";
} else if (IS_STRING_WRAPPER(value)) {
return %QuoteJSONString(ToString(value));
} else if (IS_BOOLEAN_WRAPPER(value)) {
return %_ValueOf(value) ? "true" : "false";
} else {
return SerializeObject(value, replacer, stack, indent, gap);
}
}
// Undefined or a callable object.
return void 0;
}
function BasicSerializeArray(value, stack, builder) {
var len = value.length;
if (len == 0) {
builder.push("[]");
return;
}
if (!%PushIfAbsent(stack, value)) {
throw MakeTypeError('circular_structure', []);
}
builder.push("[");
var val = value[0];
if (IS_STRING(val)) {
// First entry is a string. Remaining entries are likely to be strings too.
builder.push(%QuoteJSONString(val));
for (var i = 1; i < len; i++) {
val = value[i];
if (IS_STRING(val)) {
builder.push(%QuoteJSONStringComma(val));
} else {
builder.push(",");
var before = builder.length;
BasicJSONSerialize(i, value[i], stack, builder);
if (before == builder.length) builder[before - 1] = ",null";
}
}
} else if (IS_NUMBER(val)) {
// First entry is a number. Remaining entries are likely to be numbers too.
builder.push(NUMBER_IS_FINITE(val) ? %_NumberToString(val) : "null");
for (var i = 1; i < len; i++) {
builder.push(",");
val = value[i];
if (IS_NUMBER(val)) {
builder.push(NUMBER_IS_FINITE(val)
? %_NumberToString(val)
: "null");
} else {
var before = builder.length;
BasicJSONSerialize(i, value[i], stack, builder);
if (before == builder.length) builder[before - 1] = ",null";
}
}
} else {
var before = builder.length;
BasicJSONSerialize(0, val, stack, builder);
if (before == builder.length) builder.push("null");
for (var i = 1; i < len; i++) {
builder.push(",");
before = builder.length;
val = value[i];
BasicJSONSerialize(i, val, stack, builder);
if (before == builder.length) builder[before - 1] = ",null";
}
}
stack.pop();
builder.push("]");
}
function BasicSerializeObject(value, stack, builder) {
if (!%PushIfAbsent(stack, value)) {
throw MakeTypeError('circular_structure', []);
}
builder.push("{");
var first = true;
for (var p in value) {
if (%HasLocalProperty(value, p)) {
if (!first) {
builder.push(%QuoteJSONStringComma(p));
} else {
builder.push(%QuoteJSONString(p));
}
builder.push(":");
var before = builder.length;
BasicJSONSerialize(p, value[p], stack, builder);
if (before == builder.length) {
builder.pop();
builder.pop();
} else {
first = false;
}
}
}
stack.pop();
builder.push("}");
}
function BasicJSONSerialize(key, value, stack, builder) {
if (IS_SPEC_OBJECT(value)) {
var toJSON = value.toJSON;
if (IS_FUNCTION(toJSON)) {
value = %_CallFunction(value, ToString(key), toJSON);
}
}
if (IS_STRING(value)) {
builder.push(%QuoteJSONString(value));
} else if (IS_NUMBER(value)) {
builder.push(NUMBER_IS_FINITE(value) ? %_NumberToString(value) : "null");
} else if (IS_BOOLEAN(value)) {
builder.push(value ? "true" : "false");
} else if (IS_NULL(value)) {
builder.push("null");
} else if (IS_SPEC_OBJECT(value) && !(typeof value == "function")) {
// Value is a non-callable object.
// Unwrap value if necessary
if (IS_NUMBER_WRAPPER(value)) {
value = ToNumber(value);
builder.push(NUMBER_IS_FINITE(value) ? %_NumberToString(value) : "null");
} else if (IS_STRING_WRAPPER(value)) {
builder.push(%QuoteJSONString(ToString(value)));
} else if (IS_BOOLEAN_WRAPPER(value)) {
builder.push(%_ValueOf(value) ? "true" : "false");
} else if (IS_ARRAY(value)) {
BasicSerializeArray(value, stack, builder);
} else {
BasicSerializeObject(value, stack, builder);
}
}
}
function JSONStringify(value, replacer, space) {
if (%_ArgumentsLength() == 1) {
var builder = [];
BasicJSONSerialize('', value, [], builder);
if (builder.length == 0) return;
var result = %_FastAsciiArrayJoin(builder, "");
if (!IS_UNDEFINED(result)) return result;
return %StringBuilderConcat(builder, builder.length, "");
}
if (IS_OBJECT(space)) {
// Unwrap 'space' if it is wrapped
if (IS_NUMBER_WRAPPER(space)) {
space = ToNumber(space);
} else if (IS_STRING_WRAPPER(space)) {
space = ToString(space);
}
}
var gap;
if (IS_NUMBER(space)) {
space = MathMax(0, MathMin(ToInteger(space), 10));
gap = SubString(" ", 0, space);
} else if (IS_STRING(space)) {
if (space.length > 10) {
gap = SubString(space, 0, 10);
} else {
gap = space;
}
} else {
gap = "";
}
return JSONSerialize('', {'': value}, replacer, [], "", gap);
}
function SetupJSON() {
InstallFunctions($JSON, DONT_ENUM, $Array(
"parse", JSONParse,
"stringify", JSONStringify
));
}
SetupJSON();