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/*
* Copyright (C) 2010-2014 Thialfihar <thi@thialfihar.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.util;
import java.io.IOException;
import java.io.InputStream;
public class PositionAwareInputStream extends InputStream {
private InputStream mStream;
private long mPosition;
public PositionAwareInputStream(InputStream in) {
mStream = in;
mPosition = 0;
}
@Override
public int read() throws IOException {
int ch = mStream.read();
++mPosition;
return ch;
}
@Override
public int available() throws IOException {
return mStream.available();
}
@Override
public void close() throws IOException {
mStream.close();
}
@Override
public boolean markSupported() {
return false;
}
@Override
public int read(byte[] b) throws IOException {
int result = mStream.read(b);
mPosition += result;
return result;
}
@Override
public int read(byte[] b, int offset, int length) throws IOException {
int result = mStream.read(b, offset, length);
mPosition += result;
return result;
}
@Override
public synchronized void reset() throws IOException {
mStream.reset();
mPosition = 0;
}
@Override
public long skip(long n) throws IOException {
long result = mStream.skip(n);
mPosition += result;
return result;
}
public long position() {
return mPosition;
}
}
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