jsbool.cpp
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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 "mozilla/FloatingPoint.h"
#include "jstypes.h"
#include "jsutil.h"
#include "jsapi.h"
#include "jsatom.h"
#include "jsbool.h"
#include "jscntxt.h"
#include "jsinfer.h"
#include "jsversion.h"
#include "jslock.h"
#include "jsnum.h"
#include "jsobj.h"
#include "jsstr.h"
#include "vm/GlobalObject.h"
#include "vm/StringBuffer.h"
#include "jsinferinlines.h"
#include "jsobjinlines.h"
#include "vm/BooleanObject-inl.h"
#include "vm/GlobalObject-inl.h"
using namespace js;
using namespace js::types;
Class js::BooleanClass = {
"Boolean",
JSCLASS_HAS_RESERVED_SLOTS(1) | JSCLASS_HAS_CACHED_PROTO(JSProto_Boolean), JS_PropertyStub, /* addProperty */
JS_PropertyStub, /* delProperty */
JS_PropertyStub, /* getProperty */
JS_StrictPropertyStub, /* setProperty */
JS_EnumerateStub,
JS_ResolveStub,
JS_ConvertStub
};
JS_ALWAYS_INLINE bool
IsBoolean(const Value &v)
{
return v.isBoolean() || (v.isObject() && v.toObject().hasClass(&BooleanClass));
}
#if JS_HAS_TOSOURCE
JS_ALWAYS_INLINE bool
bool_toSource_impl(JSContext *cx, CallArgs args)
{
const Value &thisv = args.thisv();
JS_ASSERT(IsBoolean(thisv));
bool b = thisv.isBoolean() ? thisv.toBoolean() : thisv.toObject().asBoolean().unbox();
StringBuffer sb(cx);
if (!sb.append("(new Boolean(") || !BooleanToStringBuffer(cx, b, sb) || !sb.append("))"))
return false;
JSString *str = sb.finishString();
if (!str)
return false;
args.rval().setString(str);
return true;
}
JSBool
bool_toSource(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
return CallNonGenericMethod<IsBoolean, bool_toSource_impl>(cx, args);
}
#endif
JS_ALWAYS_INLINE bool
bool_toString_impl(JSContext *cx, CallArgs args)
{
const Value &thisv = args.thisv();
JS_ASSERT(IsBoolean(thisv));
bool b = thisv.isBoolean() ? thisv.toBoolean() : thisv.toObject().asBoolean().unbox();
args.rval().setString(js_BooleanToString(cx, b));
return true;
}
JSBool
bool_toString(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
return CallNonGenericMethod<IsBoolean, bool_toString_impl>(cx, args);
}
JS_ALWAYS_INLINE bool
bool_valueOf_impl(JSContext *cx, CallArgs args)
{
const Value &thisv = args.thisv();
JS_ASSERT(IsBoolean(thisv));
bool b = thisv.isBoolean() ? thisv.toBoolean() : thisv.toObject().asBoolean().unbox();
args.rval().setBoolean(b);
return true;
}
JSBool
bool_valueOf(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
return CallNonGenericMethod<IsBoolean, bool_valueOf_impl>(cx, args);
}
static 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 JSBool
Boolean(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
bool b = args.length() != 0 ? JS::ToBoolean(args[0]) : false;
if (IsConstructing(vp)) {
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->asGlobal());
RootedObject booleanProto (cx, global->createBlankPrototype(cx, &BooleanClass));
if (!booleanProto)
return NULL;
booleanProto->setFixedSlot(BooleanObject::PRIMITIVE_VALUE_SLOT, BooleanValue(false));
RootedFunction ctor(cx, global->createConstructor(cx, Boolean, cx->names().Boolean, 1));
if (!ctor)
return NULL;
if (!LinkConstructorAndPrototype(cx, ctor, booleanProto))
return NULL;
if (!DefinePropertiesAndBrand(cx, booleanProto, NULL, boolean_methods))
return NULL;
Handle<PropertyName*> valueOfName = cx->names().valueOf;
RootedFunction
valueOf(cx, js_NewFunction(cx, NullPtr(), bool_valueOf, 0, 0, global, valueOfName));
if (!valueOf)
return NULL;
RootedValue value(cx, ObjectValue(*valueOf));
if (!JSObject::defineProperty(cx, booleanProto, valueOfName, value,
JS_PropertyStub, JS_StrictPropertyStub, 0))
{
return NULL;
}
global->setBooleanValueOf(valueOf);
if (!DefineConstructorAndPrototype(cx, global, JSProto_Boolean, ctor, booleanProto))
return NULL;
return booleanProto;
}
JSString *
js_BooleanToString(JSContext *cx, JSBool b)
{
return b ? cx->runtime->atomState.true_ : cx->runtime->atomState.false_;
}
namespace js {
JS_PUBLIC_API(bool)
ToBooleanSlow(const Value &v)
{
JS_ASSERT(v.isString());
return v.toString()->length() != 0;
}
bool
BooleanGetPrimitiveValueSlow(JSContext *cx, JSObject &obj, Value *vp)
{
InvokeArgsGuard ag;
if (!cx->stack.pushInvokeArgs(cx, 0, &ag))
return false;
ag.setCallee(cx->compartment->maybeGlobal()->booleanValueOf());
ag.setThis(ObjectValue(obj));
if (!Invoke(cx, ag))
return false;
*vp = ag.rval();
return true;
}
} /* namespace js */