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/* Copyright 2017 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
package org.brotli.dec;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.IntBuffer;
/**
* Byte-to-int conversion magic.
*/
final class IntReader {
static final int CAPACITY = 1024 + 16;
private final ByteBuffer byteBuffer =
ByteBuffer.allocateDirect(CAPACITY << 2).order(ByteOrder.LITTLE_ENDIAN);
private final IntBuffer intBuffer = byteBuffer.asIntBuffer();
/**
* Reinitialize reader with new data chunk.
*
* NB: intLen == 4 * byteSize!
* NB: intLen should be less or equal to {@link CAPACITY}
*/
static void reload(IntReader ir, byte[] data, int offset, int intLen) {
ir.byteBuffer.clear();
ir.byteBuffer.put(data, offset, intLen << 2);
ir.intBuffer.rewind();
}
static int position(IntReader ir) {
return ir.intBuffer.position();
}
static void setPosition(IntReader ir, int position) {
ir.intBuffer.position(position);
}
static int read(IntReader ir) {
// Advances position by 1.
return ir.intBuffer.get();
}
}
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