net.jpountz.xxhash.XXHash64JNI Maven / Gradle / Ivy
package net.jpountz.xxhash;
/*
* 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.
*/
import static net.jpountz.util.ByteBufferUtils.checkRange;
import static net.jpountz.util.SafeUtils.checkRange;
import java.nio.ByteBuffer;
final class XXHash64JNI extends XXHash64 {
public static final XXHash64 INSTANCE = new XXHash64JNI();
private static XXHash64 SAFE_INSTANCE;
@Override
public long hash(byte[] buf, int off, int len, long seed) {
checkRange(buf, off, len);
return XXHashJNI.XXH64(buf, off, len, seed);
}
@Override
public long hash(ByteBuffer buf, int off, int len, long seed) {
if (buf.isDirect()) {
checkRange(buf, off, len);
return XXHashJNI.XXH64BB(buf, off, len, seed);
} else if (buf.hasArray()) {
return hash(buf.array(), off + buf.arrayOffset(), len, seed);
} else {
XXHash64 safeInstance = SAFE_INSTANCE;
if (safeInstance == null) {
safeInstance = SAFE_INSTANCE = XXHashFactory.safeInstance().hash64();
}
return safeInstance.hash(buf, off, len, seed);
}
}
}