/*
* Copyright 2012 b1.org
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.b1.pack.standard.reader;
import com.google.common.base.Preconditions;
import org.b1.pack.standard.common.Constants;
import java.io.IOException;
import java.io.InputStream;
class LzmaEncodedInputStream extends InputStream {
private final BlockCursor blockCursor;
public LzmaEncodedInputStream(BlockCursor blockCursor) {
this.blockCursor = blockCursor;
}
@Override
public int read() throws IOException {
while (true) {
int result = blockCursor.getInputStream().read();
if (result != -1) return result;
moveToNextBlock();
}
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
while (true) {
int result = blockCursor.getInputStream().read(b, off, len);
if (result != -1) return result;
moveToNextBlock();
}
}
@Override
public int available() throws IOException {
return blockCursor.getInputStream().available();
}
private void moveToNextBlock() throws IOException {
blockCursor.next();
Preconditions.checkState(blockCursor.getBlockType() == Constants.NEXT_LZMA_BLOCK);
}
}