/*
 * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
 *
 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
 * derivative works of, display, perform, and distribute the Software and make,
 * use, sell, offer for sale, import, export, have made, and have sold the
 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.oracle.truffle.object;

Helper methods for accessing property and object flags.
/** * Helper methods for accessing property and object flags. */
public final class Flags { static final long DEFAULT = 0L;
If set, int values can be implicitly cast to long.
/** If set, {@code int} values can be implicitly cast to {@code long}. */
static final long IMPLICIT_CAST_INT_TO_LONG = 1L << 32;
If set, int values can be implicitly cast to double.
/** If set, {@code int} values can be implicitly cast to {@code double}. */
static final long IMPLICIT_CAST_INT_TO_DOUBLE = 1L << 33;
Only set property if it already exists.
/** Only set property if it already exists. */
static final long SET_EXISTING = 1L << 34;
Redefine property if it already exists.
/** Redefine property if it already exists. */
static final long UPDATE_FLAGS = 1L << 35;
Define property as constant in the shape.
/** Define property as constant in the shape. */
static final long CONST = 1L << 36;
Declare property with constant initial value in the shape.
/** Declare property with constant initial value in the shape. */
static final long DECLARE = 1L << 37;
Split off separate shape.
/** Split off separate shape. */
static final long SEPARATE_SHAPE = 1L << 38; static final long PROPERTY_FLAGS_MASK = 0xffff_ffffL; private Flags() { // do not instantiate } private static boolean getFlag(long flags, long flagBit) { return (flags & flagBit) != 0; } public static boolean isImplicitCastIntToLong(long flags) { return getFlag(flags, IMPLICIT_CAST_INT_TO_LONG); } public static boolean isImplicitCastIntToDouble(long flags) { return getFlag(flags, IMPLICIT_CAST_INT_TO_DOUBLE); } public static boolean isSetExisting(long flags) { return getFlag(flags, SET_EXISTING); } public static boolean isUpdateFlags(long flags) { return getFlag(flags, UPDATE_FLAGS); } public static boolean isConstant(long flags) { return getFlag(flags, CONST); } public static boolean isDeclaration(long flags) { return getFlag(flags, DECLARE); } public static boolean isSeparateShape(long flags) { return getFlag(flags, SEPARATE_SHAPE); } public static int getPropertyFlags(long putFlags) { return (int) (putFlags & PROPERTY_FLAGS_MASK); } public static long propertyFlagsToPutFlags(int propertyFlags) { return (propertyFlags & PROPERTY_FLAGS_MASK); } }