/*
* Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.max.vm.bytecode;
/**
* A block of bytecode.
*/
public class BytecodeBlock {
/**
* The lowest bci regarded as within this range.
*/
public final int start;
/**
* The highest bci regarded as within this range.
*/
public final int end;
private final byte[] code;
public BytecodeBlock(byte[] bytecode, int startBCI, int endBCI) {
this.start = startBCI;
this.end = endBCI;
code = bytecode;
assert check();
}
public BytecodeBlock(byte[] bytecode) {
this(bytecode, 0, bytecode.length - 1);
}
private boolean check() {
assert code != null;
assert code.length > 0;
assert start >= 0;
assert end >= start;
assert end <= code.length;
return true;
}
/**
* Gets the code to which the range of BCIs in this object refer.
*/
public byte[] code() {
return code;
}
/**
* Gets the number of BCIs covered by this block.
*/
public int size() {
return end - start + 1;
}
@Override
public String toString() {
return start + "-" + end;
}
}