0N/A/*
2362N/A * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage sun.tools.tree;
0N/A
0N/Aimport sun.tools.java.*;
0N/Aimport sun.tools.asm.Assembler;
0N/Aimport sun.tools.asm.Label;
0N/Aimport java.io.PrintStream;
0N/Aimport java.util.Hashtable;
0N/A
0N/A/**
0N/A * WARNING: The contents of this source file are not part of any
0N/A * supported API. Code that depends on them does so at its own risk:
0N/A * they are subject to change or removal without notice.
0N/A */
0N/Apublic
0N/Aclass BooleanExpression extends ConstantExpression {
0N/A boolean value;
0N/A
0N/A /**
0N/A * Constructor
0N/A */
0N/A public BooleanExpression(long where, boolean value) {
0N/A super(BOOLEANVAL, where, Type.tBoolean);
0N/A this.value = value;
0N/A }
0N/A
0N/A /**
0N/A * Get the value
0N/A */
0N/A public Object getValue() {
0N/A return new Integer(value ? 1 : 0);
0N/A }
0N/A
0N/A /**
0N/A * Check if the expression is equal to a value
0N/A */
0N/A public boolean equals(boolean b) {
0N/A return value == b;
0N/A }
0N/A
0N/A
0N/A /**
0N/A * Check if the expression is equal to its default static value
0N/A */
0N/A public boolean equalsDefault() {
0N/A return !value;
0N/A }
0N/A
0N/A
0N/A /*
0N/A * Check a "not" expression.
0N/A *
0N/A * cvars is modified so that
0N/A * cvar.vsTrue indicates variables with a known value if
0N/A * the expression is true.
0N/A * cvars.vsFalse indicates variables with a known value if
0N/A * the expression is false
0N/A *
0N/A * For constant expressions, set the side that corresponds to our
0N/A * already known value to vset. Set the side that corresponds to the
0N/A * other way to "impossible"
0N/A */
0N/A
0N/A public void checkCondition(Environment env, Context ctx,
0N/A Vset vset, Hashtable exp, ConditionVars cvars) {
0N/A if (value) {
0N/A cvars.vsFalse = Vset.DEAD_END;
0N/A cvars.vsTrue = vset;
0N/A } else {
0N/A cvars.vsFalse = vset;
0N/A cvars.vsTrue = Vset.DEAD_END;
0N/A }
0N/A }
0N/A
0N/A
0N/A /**
0N/A * Code
0N/A */
0N/A void codeBranch(Environment env, Context ctx, Assembler asm, Label lbl, boolean whenTrue) {
0N/A if (value == whenTrue) {
0N/A asm.add(where, opc_goto, lbl);
0N/A }
0N/A }
0N/A public void codeValue(Environment env, Context ctx, Assembler asm) {
0N/A asm.add(where, opc_ldc, new Integer(value ? 1 : 0));
0N/A }
0N/A
0N/A /**
0N/A * Print
0N/A */
0N/A public void print(PrintStream out) {
0N/A out.print(value ? "true" : "false");
0N/A }
0N/A}