Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.lz4 / src / net / jpountz / xxhash / StreamingXXHash64JNI.java

diff --git a/bundles/org.simantics.lz4/src/net/jpountz/xxhash/StreamingXXHash64JNI.java b/bundles/org.simantics.lz4/src/net/jpountz/xxhash/StreamingXXHash64JNI.java
new file mode 100644 (file)
index 0000000..b7ab1ac
--- /dev/null
+++ b/bundles/org.simantics.lz4/src/net/jpountz/xxhash/StreamingXXHash64JNI.java
@@ -0,0 +1,71 @@
+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.
+ */
+
+
+final class StreamingXXHash64JNI extends StreamingXXHash64 {
+
+  static class Factory implements StreamingXXHash64.Factory {
+
+    public static final StreamingXXHash64.Factory INSTANCE = new Factory();
+
+    @Override
+    public StreamingXXHash64 newStreamingHash(long seed) {
+      return new StreamingXXHash64JNI(seed);
+    }
+
+  }
+
+  private long state;
+
+  StreamingXXHash64JNI(long seed) {
+    super(seed);
+    state = XXHashJNI.XXH64_init(seed);
+  }
+
+  private void checkState() {
+    if (state == 0) {
+      throw new AssertionError("Already finalized");
+    }
+  }
+
+  @Override
+  public void reset() {
+    checkState();
+    XXHashJNI.XXH64_free(state);
+    state = XXHashJNI.XXH64_init(seed);
+  }
+
+  @Override
+  public long getValue() {
+    checkState();
+    return XXHashJNI.XXH64_digest(state);
+  }
+
+  @Override
+  public void update(byte[] bytes, int off, int len) {
+    checkState();
+    XXHashJNI.XXH64_update(state, bytes, off, len);
+  }
+
+  @Override
+  protected void finalize() throws Throwable {
+    super.finalize();
+    // free memory
+    XXHashJNI.XXH64_free(state);
+    state = 0;
+  }
+
+}