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// Copyright 2006-2008 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.
// This file contains infrastructure used by the API. See
// v8natives.js for an explanation of these files are processed and
// loaded.
function CreateDate(time) {
var date = new $Date();
date.setTime(time);
return date;
}
var kApiFunctionCache = new InternalArray();
var functionCache = kApiFunctionCache;
function Instantiate(data, name) {
if (!%IsTemplate(data)) return data;
var tag = %GetTemplateField(data, kApiTagOffset);
switch (tag) {
case kFunctionTag:
return InstantiateFunction(data, name);
case kNewObjectTag:
var Constructor = %GetTemplateField(data, kApiConstructorOffset);
// Note: Do not directly use a function template as a condition, our
// internal ToBoolean doesn't handle that!
var result = typeof Constructor === 'undefined' ?
{} : new (Instantiate(Constructor))();
ConfigureTemplateInstance(result, data);
result = %ToFastProperties(result);
return result;
default:
throw 'Unknown API tag <' + tag + '>';
}
}
function InstantiateFunction(data, name) {
// We need a reference to kApiFunctionCache in the stack frame
// if we need to bail out from a stack overflow.
var cache = kApiFunctionCache;
var serialNumber = %GetTemplateField(data, kApiSerialNumberOffset);
var isFunctionCached =
(serialNumber in cache) && (cache[serialNumber] != kUninitialized);
if (!isFunctionCached) {
try {
cache[serialNumber] = null;
var fun = %CreateApiFunction(data);
if (name) %FunctionSetName(fun, name);
var flags = %GetTemplateField(data, kApiFlagOffset);
var doNotCache = flags & (1 << kDoNotCacheBit);
if (!doNotCache) cache[serialNumber] = fun;
if (flags & (1 << kRemovePrototypeBit)) {
%FunctionRemovePrototype(fun);
} else {
var prototype = %GetTemplateField(data, kApiPrototypeTemplateOffset);
// Note: Do not directly use an object template as a condition, our
// internal ToBoolean doesn't handle that!
fun.prototype = typeof prototype === 'undefined' ?
{} : Instantiate(prototype);
if (flags & (1 << kReadOnlyPrototypeBit)) {
%FunctionSetReadOnlyPrototype(fun);
}
%SetProperty(fun.prototype, "constructor", fun, DONT_ENUM);
var parent = %GetTemplateField(data, kApiParentTemplateOffset);
// Note: Do not directly use a function template as a condition, our
// internal ToBoolean doesn't handle that!
if (!(typeof parent === 'undefined')) {
var parent_fun = Instantiate(parent);
%SetPrototype(fun.prototype, parent_fun.prototype);
}
}
ConfigureTemplateInstance(fun, data);
if (doNotCache) return fun;
} catch (e) {
cache[serialNumber] = kUninitialized;
throw e;
}
}
return cache[serialNumber];
}
function ConfigureTemplateInstance(obj, data) {
var properties = %GetTemplateField(data, kApiPropertyListOffset);
if (!properties) return;
// Disable access checks while instantiating the object.
var requires_access_checks = %DisableAccessChecks(obj);
try {
for (var i = 1; i < properties[0];) {
var length = properties[i];
if (length == 3) {
var name = properties[i + 1];
var prop_data = properties[i + 2];
var attributes = properties[i + 3];
var value = Instantiate(prop_data, name);
%SetProperty(obj, name, value, attributes);
} else if (length == 5) {
var name = properties[i + 1];
var getter = properties[i + 2];
var setter = properties[i + 3];
var attribute = properties[i + 4];
var access_control = properties[i + 5];
%SetAccessorProperty(
obj, name, getter, setter, attribute, access_control);
} else {
throw "Bad properties array";
}
i += length + 1;
}
} finally {
if (requires_access_checks) %EnableAccessChecks(obj);
}
}
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