64 lines
2.0 KiB
Java
64 lines
2.0 KiB
Java
/*
|
|
* Copyright (c) 2009, 2014, 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 org.openjdk.asmtools.jdec;
|
|
|
|
import java.io.ByteArrayInputStream;
|
|
import java.util.Stack;
|
|
|
|
/**
|
|
* this class provides functionality needed to read class files:
|
|
* <ul>
|
|
* <li>methods to read unsigned integers of various length
|
|
* <li>counts bytes read so far
|
|
* </ul>
|
|
*/
|
|
public class NestedByteArrayInputStream extends ByteArrayInputStream {
|
|
|
|
NestedByteArrayInputStream(byte buf[]) {
|
|
super(buf);
|
|
}
|
|
|
|
NestedByteArrayInputStream(byte buf[], int offset, int length) {
|
|
super(buf, offset, length);
|
|
}
|
|
|
|
/*---- */
|
|
public int getPos() {
|
|
return pos;
|
|
}
|
|
Stack savedStates = new Stack();
|
|
|
|
public void enter(int range) {
|
|
savedStates.push(new Integer(count));
|
|
if (pos + range < count) {
|
|
count = pos + range;
|
|
}
|
|
}
|
|
|
|
public void leave() {
|
|
pos = count;
|
|
count = ((Integer) savedStates.pop()).intValue();
|
|
}
|
|
} // end class NestedByteArrayInputStream
|
|
|