Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.lz4 / src / net / jpountz / lz4 / LZ4Constants.java

diff --git a/bundles/org.simantics.lz4/src/net/jpountz/lz4/LZ4Constants.java b/bundles/org.simantics.lz4/src/net/jpountz/lz4/LZ4Constants.java
new file mode 100644 (file)
index 0000000..710007e
--- /dev/null
+++ b/bundles/org.simantics.lz4/src/net/jpountz/lz4/LZ4Constants.java
@@ -0,0 +1,53 @@
+package net.jpountz.lz4;
+
+/*
+ * 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.
+ */
+
+
+enum LZ4Constants {
+  ;
+
+  static final int DEFAULT_COMPRESSION_LEVEL = 8+1;
+  static final int MAX_COMPRESSION_LEVEL = 16+1;
+
+  static final int MEMORY_USAGE = 14;
+  static final int NOT_COMPRESSIBLE_DETECTION_LEVEL = 6;
+
+  static final int MIN_MATCH = 4;
+
+  static final int HASH_LOG = MEMORY_USAGE - 2;
+  static final int HASH_TABLE_SIZE = 1 << HASH_LOG;
+
+  static final int SKIP_STRENGTH = Math.max(NOT_COMPRESSIBLE_DETECTION_LEVEL, 2);
+  static final int COPY_LENGTH = 8;
+  static final int LAST_LITERALS = 5;
+  static final int MF_LIMIT = COPY_LENGTH + MIN_MATCH;
+  static final int MIN_LENGTH = MF_LIMIT + 1;
+
+  static final int MAX_DISTANCE = 1 << 16;
+
+  static final int ML_BITS = 4;
+  static final int ML_MASK = (1 << ML_BITS) - 1;
+  static final int RUN_BITS = 8 - ML_BITS;
+  static final int RUN_MASK = (1 << RUN_BITS) - 1;
+
+  static final int LZ4_64K_LIMIT = (1 << 16) + (MF_LIMIT - 1);
+  static final int HASH_LOG_64K = HASH_LOG + 1;
+  static final int HASH_TABLE_SIZE_64K = 1 << HASH_LOG_64K;
+
+  static final int HASH_LOG_HC = 15;
+  static final int HASH_TABLE_SIZE_HC = 1 << HASH_LOG_HC;
+  static final int OPTIMAL_ML = ML_MASK - 1 + MIN_MATCH;
+
+}