/js/src/jsbool.cpp
http://github.com/zpao/v8monkey · C++ · 238 lines · 155 code · 35 blank · 48 comment · 26 complexity · e6c855d7f1e511542594470b84afa32f MD5 · raw file
- /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is Mozilla Communicator client code, released
- * March 31, 1998.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
- /*
- * JS boolean implementation.
- */
- #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/BooleanObject-inl.h"
- #include "vm/GlobalObject.h"
- #include "jsinferinlines.h"
- #include "jsobjinlines.h"
- #include "jsstrinlines.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
- };
- #if JS_HAS_TOSOURCE
- static JSBool
- bool_toSource(JSContext *cx, uintN argc, Value *vp)
- {
- CallArgs args = CallArgsFromVp(argc, vp);
- bool b, ok;
- if (!BoxedPrimitiveMethodGuard(cx, args, bool_toSource, &b, &ok))
- return ok;
- 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;
- }
- #endif
- static JSBool
- bool_toString(JSContext *cx, uintN argc, Value *vp)
- {
- CallArgs args = CallArgsFromVp(argc, vp);
- bool b, ok;
- if (!BoxedPrimitiveMethodGuard<bool>(cx, args, bool_toString, &b, &ok))
- return ok;
- args.rval().setString(cx->runtime->atomState.booleanAtoms[b ? 1 : 0]);
- return true;
- }
- static JSBool
- bool_valueOf(JSContext *cx, uintN argc, Value *vp)
- {
- CallArgs args = CallArgsFromVp(argc, vp);
- bool b, ok;
- if (!BoxedPrimitiveMethodGuard(cx, args, bool_valueOf, &b, &ok))
- return ok;
- args.rval().setBoolean(b);
- return true;
- }
- 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_FN(js_valueOf_str, bool_valueOf, 0, 0),
- JS_FS_END
- };
- static JSBool
- Boolean(JSContext *cx, uintN argc, Value *vp)
- {
- CallArgs args = CallArgsFromVp(argc, vp);
- bool b = args.length() != 0 ? js_ValueToBoolean(args[0]) : false;
- if (IsConstructing(vp)) {
- JSObject *obj = BooleanObject::create(cx, b);
- args.rval().setObject(*obj);
- } else {
- args.rval().setBoolean(b);
- }
- return true;
- }
- JSObject *
- js_InitBooleanClass(JSContext *cx, JSObject *obj)
- {
- JS_ASSERT(obj->isNative());
- GlobalObject *global = &obj->asGlobal();
- JSObject *booleanProto = global->createBlankPrototype(cx, &BooleanClass);
- if (!booleanProto)
- return NULL;
- booleanProto->setPrimitiveThis(BooleanValue(false));
- JSFunction *ctor = global->createConstructor(cx, Boolean, &BooleanClass,
- CLASS_ATOM(cx, Boolean), 1);
- if (!ctor)
- return NULL;
- if (!LinkConstructorAndPrototype(cx, ctor, booleanProto))
- return NULL;
- if (!DefinePropertiesAndBrand(cx, booleanProto, NULL, boolean_methods))
- return NULL;
- if (!DefineConstructorAndPrototype(cx, global, JSProto_Boolean, ctor, booleanProto))
- return NULL;
- return booleanProto;
- }
- JSString *
- js_BooleanToString(JSContext *cx, JSBool b)
- {
- return cx->runtime->atomState.booleanAtoms[b ? 1 : 0];
- }
- /* This function implements E-262-3 section 9.8, toString. */
- bool
- js::BooleanToStringBuffer(JSContext *cx, JSBool b, StringBuffer &sb)
- {
- return b ? sb.append("true") : sb.append("false");
- }
- namespace js {
- bool
- BooleanGetPrimitiveValueSlow(JSContext *cx, JSObject &obj, Value *vp)
- {
- JS_ASSERT(ObjectClassIs(obj, ESClass_Boolean, cx));
- JS_ASSERT(obj.isProxy());
- /*
- * To respect the proxy abstraction, we can't simply unwrap and call
- * getPrimitiveThis on the wrapped object. All we know is that obj says
- * its [[Class]] is "Boolean". Boolean.prototype.valueOf is specified to
- * return the [[PrimitiveValue]] internal property, so call that instead.
- */
- InvokeArgsGuard ag;
- if (!cx->stack.pushInvokeArgs(cx, 0, &ag))
- return false;
- ag.calleev().setUndefined();
- ag.thisv().setObject(obj);
- if (!GetProxyHandler(&obj)->nativeCall(cx, &obj, &BooleanClass, bool_valueOf, ag))
- return false;
- *vp = ag.rval();
- return true;
- }
- } /* namespace js */
- JSBool
- js_ValueToBoolean(const Value &v)
- {
- if (v.isInt32())
- return v.toInt32() != 0;
- if (v.isString())
- return v.toString()->length() != 0;
- if (v.isObject())
- return JS_TRUE;
- if (v.isNullOrUndefined())
- return JS_FALSE;
- if (v.isDouble()) {
- jsdouble d;
- d = v.toDouble();
- return !JSDOUBLE_IS_NaN(d) && d != 0;
- }
- JS_ASSERT(v.isBoolean());
- return v.toBoolean();
- }