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/**
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* Back 2 Browser Bytecode Translator
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* Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. Look for COPYING file in the top folder.
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* If not, see http://opensource.org/licenses/GPL-2.0.
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*/
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package org.apidesign.vm4brwsr;
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final class Variable implements CharSequence {
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private static final String STACK_VAR_PREFIX = "st";
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private static final String LOCAL_VAR_PREFIX = "lc";
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private final String name;
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private final int type;
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private final int index;
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private static final char[] TYPE_IDS = { 'I', 'L', 'F', 'D', 'A' };
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private Variable(final String prefix, final int type, final int index) {
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this.name = prefix + TYPE_IDS[type] + index;
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this.type = type;
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this.index = index;
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}
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public static Variable getStackVariable(
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final int type, final int index) {
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// TODO: precreate frequently used variables
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return new Variable(STACK_VAR_PREFIX, type, index);
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}
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public static Variable getLocalVariable(
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final int type, final int index) {
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// TODO: precreate frequently used variables
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return new Variable(LOCAL_VAR_PREFIX, type, index);
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}
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public String getName() {
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return name;
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}
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public int getType() {
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return type;
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}
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public int getIndex() {
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return index;
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}
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public boolean isCategory2() {
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return VarType.isCategory2(type);
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}
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@Override
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public int length() {
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return name.length();
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}
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@Override
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public char charAt(final int index) {
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return name.charAt(index);
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}
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@Override
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public CharSequence subSequence(final int start, final int end) {
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return name.subSequence(start, end);
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}
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@Override
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public int hashCode() {
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return name.hashCode();
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}
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@Override
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public boolean equals(final Object other) {
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if (this == other) {
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return true;
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}
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if (!(other instanceof Variable)) {
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return false;
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}
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return name.equals(((Variable) other).name);
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}
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@Override
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public String toString() {
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return name;
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}
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}
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