| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.dev.jjs.ast; |
| |
| import com.google.gwt.dev.jjs.SourceInfo; |
| import com.google.gwt.dev.jjs.SourceOrigin; |
| |
| /** |
| * Java literal typed as a float. |
| */ |
| public class JFloatLiteral extends JValueLiteral { |
| |
| public static final JFloatLiteral ZERO = new JFloatLiteral(SourceOrigin.UNKNOWN, Float |
| .intBitsToFloat(0)); |
| |
| public static JFloatLiteral get(float value) { |
| return isZero(value) ? ZERO : new JFloatLiteral(SourceOrigin.UNKNOWN, value); |
| } |
| |
| /** |
| * Does this value match the exact 0 bit pattern? (This precludes |
| * canonicalizing -0.0 as 0.0). |
| */ |
| private static boolean isZero(float value) { |
| return Float.floatToRawIntBits(value) == 0; |
| } |
| |
| private final float value; |
| |
| public JFloatLiteral(SourceInfo sourceInfo, float value) { |
| super(sourceInfo); |
| this.value = value; |
| } |
| |
| @Override |
| public JValueLiteral cloneFrom(JValueLiteral value) { |
| Object valueObj = value.getValueObj(); |
| if (valueObj instanceof Character) { |
| Character character = (Character) valueObj; |
| return new JFloatLiteral(value.getSourceInfo(), character.charValue()); |
| } else if (valueObj instanceof Number) { |
| Number number = (Number) valueObj; |
| return new JFloatLiteral(value.getSourceInfo(), number.floatValue()); |
| } |
| return null; |
| } |
| |
| public JType getType() { |
| return JPrimitiveType.FLOAT; |
| } |
| |
| public float getValue() { |
| return value; |
| } |
| |
| @Override |
| public Object getValueObj() { |
| return new Float(value); |
| } |
| |
| public void traverse(JVisitor visitor, Context ctx) { |
| if (visitor.visit(this, ctx)) { |
| } |
| visitor.endVisit(this, ctx); |
| } |
| |
| private Object readResolve() { |
| return isZero(value) ? ZERO : this; |
| } |
| } |