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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* JS boolean implementation.
*/
#include "jsboolinlines.h"
#include "jsapi.h"
#include "jsatom.h"
#include "jscntxt.h"
#include "jsobj.h"
#include "jstypes.h"
#include "vm/GlobalObject.h"
#include "vm/ProxyObject.h"
#include "vm/StringBuffer.h"
#include "vm/BooleanObject-inl.h"
using namespace js;
using namespace js::types;
const Class BooleanObject::class_ = {
"Boolean",
JSCLASS_HAS_RESERVED_SLOTS(1) | JSCLASS_HAS_CACHED_PROTO(JSProto_Boolean),
JS_PropertyStub, /* addProperty */
JS_DeletePropertyStub, /* delProperty */
JS_PropertyStub, /* getProperty */
JS_StrictPropertyStub, /* setProperty */
JS_EnumerateStub,
JS_ResolveStub,
JS_ConvertStub
};
MOZ_ALWAYS_INLINE bool
IsBoolean(HandleValue v)
{
return v.isBoolean() || (v.isObject() && v.toObject().is<BooleanObject>());
}
#if JS_HAS_TOSOURCE
MOZ_ALWAYS_INLINE bool
bool_toSource_impl(JSContext* cx, CallArgs args)
{
HandleValue thisv = args.thisv();
JS_ASSERT(IsBoolean(thisv));
bool b = thisv.isBoolean() ? thisv.toBoolean() : thisv.toObject().as<BooleanObject>().unbox();
StringBuffer sb(cx);
if (!sb.append("(new Boolean(") || !BooleanToStringBuffer(b, sb) || !sb.append("))"))
return false;
JSString* str = sb.finishString();
if (!str)
return false;
args.rval().setString(str);
return true;
}
static bool
bool_toSource(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
return CallNonGenericMethod<IsBoolean, bool_toSource_impl>(cx, args);
}
#endif
MOZ_ALWAYS_INLINE bool
bool_toString_impl(JSContext* cx, CallArgs args)
{
HandleValue thisv = args.thisv();
JS_ASSERT(IsBoolean(thisv));
bool b = thisv.isBoolean() ? thisv.toBoolean() : thisv.toObject().as<BooleanObject>().unbox();
args.rval().setString(js_BooleanToString(cx, b));
return true;
}
static bool
bool_toString(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
return CallNonGenericMethod<IsBoolean, bool_toString_impl>(cx, args);
}
MOZ_ALWAYS_INLINE bool
bool_valueOf_impl(JSContext* cx, CallArgs args)
{
HandleValue thisv = args.thisv();
JS_ASSERT(IsBoolean(thisv));
bool b = thisv.isBoolean() ? thisv.toBoolean() : thisv.toObject().as<BooleanObject>().unbox();
args.rval().setBoolean(b);
return true;
}
static bool
bool_valueOf(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
return CallNonGenericMethod<IsBoolean, bool_valueOf_impl>(cx, args);
}
static const JSFunctionSpec boolean_methods[] = {
#if JS_HAS_TOSOURCE
JS_FN(js_toSource_str, bool_toSource, 0, 0),
#endif
JS_FN(js_toString_str, bool_toString, 0, 0),
JS_FS_END
};
static bool
Boolean(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
bool b = args.length() != 0 ? JS::ToBoolean(args[0]) : false;
if (args.isConstructing()) {
JSObject* obj = BooleanObject::create(cx, b);
if (!obj)
return false;
args.rval().setObject(*obj);
} else {
args.rval().setBoolean(b);
}
return true;
}
JSObject*
js_InitBooleanClass(JSContext* cx, HandleObject obj)
{
JS_ASSERT(obj->isNative());
Rooted<GlobalObject*> global(cx, &obj->as<GlobalObject>());
RootedObject booleanProto (cx, global->createBlankPrototype(cx, &BooleanObject::class_));
if (!booleanProto)
return nullptr;
booleanProto->setFixedSlot(BooleanObject::PRIMITIVE_VALUE_SLOT, BooleanValue(false));
RootedFunction ctor(cx, global->createConstructor(cx, Boolean, cx->names().Boolean, 1));
if (!ctor)
return nullptr;
if (!LinkConstructorAndPrototype(cx, ctor, booleanProto))
return nullptr;
if (!DefinePropertiesAndBrand(cx, booleanProto, nullptr, boolean_methods))
return nullptr;
Handle<PropertyName*> valueOfName = cx->names().valueOf;
RootedFunction
valueOf(cx, NewFunction(cx, NullPtr(), bool_valueOf, 0, JSFunction::NATIVE_FUN,
global, valueOfName));
if (!valueOf)
return nullptr;
RootedValue value(cx, ObjectValue(*valueOf));
if (!JSObject::defineProperty(cx, booleanProto, valueOfName, value,
JS_PropertyStub, JS_StrictPropertyStub, 0))
{
return nullptr;
}
if (!GlobalObject::initBuiltinConstructor(cx, global, JSProto_Boolean, ctor, booleanProto))
return nullptr;
return booleanProto;
}
JSString*
js_BooleanToString(ExclusiveContext* cx, bool b)
{
return b ? cx->names().true_ : cx->names().false_;
}
JS_PUBLIC_API(bool)
js::ToBooleanSlow(HandleValue v)
{
if (v.isString())
return v.toString()->length() != 0;
JS_ASSERT(v.isObject());
return !EmulatesUndefined(&v.toObject());
}
/*
* This slow path is only ever taken for proxies wrapping Boolean objects
* The only caller of the fast path, JSON's PreprocessValue, ensures that.
*/
bool
js::BooleanGetPrimitiveValueSlow(HandleObject wrappedBool)
{
JSObject* obj = CheckedUnwrap(wrappedBool);
if (!obj || !obj->is<BooleanObject>())
return false;
return obj->as<BooleanObject>().unbox();
}
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