--- /dev/null
+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 XXHash32JNI extends XXHash32 {
+
+ public static final XXHash32 INSTANCE = new XXHash32JNI();
+ private static XXHash32 SAFE_INSTANCE;
+
+ @Override
+ public int hash(byte[] buf, int off, int len, int seed) {
+ checkRange(buf, off, len);
+ return XXHashJNI.XXH32(buf, off, len, seed);
+ }
+
+ @Override
+ public int hash(ByteBuffer buf, int off, int len, int seed) {
+ if (buf.isDirect()) {
+ checkRange(buf, off, len);
+ return XXHashJNI.XXH32BB(buf, off, len, seed);
+ } else if (buf.hasArray()) {
+ return hash(buf.array(), off + buf.arrayOffset(), len, seed);
+ } else {
+ XXHash32 safeInstance = SAFE_INSTANCE;
+ if (safeInstance == null) {
+ safeInstance = SAFE_INSTANCE = XXHashFactory.safeInstance().hash32();
+ }
+ return safeInstance.hash(buf, off, len, seed);
+ }
+ }
+
+}