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); } } }