com.scurrilous.circe.checksum.JniIntHash Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 com.scurrilous.circe.checksum;
import static com.scurrilous.circe.params.CrcParameters.CRC32C;
import com.scurrilous.circe.IncrementalIntHash;
import org.apache.pulsar.shade.io.netty.buffer.ByteBuf;
public class JniIntHash implements IntHash {
private final IncrementalIntHash hash = new Crc32cSse42Provider().getIncrementalInt(CRC32C);
@Override
public int calculate(ByteBuf buffer) {
return calculate(buffer, buffer.readerIndex(), buffer.readableBytes());
}
@Override
public int resume(int current, ByteBuf buffer) {
return resume(current, buffer, buffer.readerIndex(), buffer.readableBytes());
}
@Override
public int calculate(ByteBuf buffer, int offset, int len) {
return resume(0, buffer, offset, len);
}
@Override
public int resume(int current, ByteBuf buffer, int offset, int len) {
if (buffer.hasMemoryAddress()) {
return hash.resume(current, buffer.memoryAddress() + offset, len);
} else if (buffer.hasArray()) {
return hash.resume(current, buffer.array(), buffer.arrayOffset() + offset, len);
} else {
return hash.resume(current, buffer.slice(offset, len).nioBuffer());
}
}
@Override
public int resume(int current, byte[] buffer, int offset, int len) {
return hash.resume(current, buffer, offset, len);
}
@Override
public boolean acceptsMemoryAddressBuffer() {
return true;
}
}