content: /*
   * 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.
   */
  package io.airlift.compress.v3.zstd;
  
  import static io.airlift.compress.v3.zstd.Constants.MAX_BLOCK_SIZE;
  import static io.airlift.compress.v3.zstd.Util.checkArgument;
  import static java.lang.Math.clamp;
  
  class CompressionContext
  {
      public final CompressionParameters parameters;
      public final RepeatedOffsets offsets = new RepeatedOffsets();
      public final BlockCompressionState blockCompressionState;
      public final SequenceStore sequenceStore;
  
      public final SequenceEncodingContext sequenceEncodingContext = new SequenceEncodingContext();
  
      public final HuffmanCompressionContext huffmanContext = new HuffmanCompressionContext();
  
      public CompressionContext(CompressionParameters parameters, long baseAddress, int inputSize)
      {
          this.parameters = parameters;
  
          int windowSize = clamp(inputSize, 1, parameters.getWindowSize());
          int blockSize = Math.min(MAX_BLOCK_SIZE, windowSize);
          int divider = (parameters.getSearchLength() == 3) ? 3 : 4;
  
          int maxSequences = blockSize / divider;
  
          sequenceStore = new SequenceStore(blockSize, maxSequences);
  
          blockCompressionState = new BlockCompressionState(parameters, baseAddress);
      }
  
      public void slideWindow(int slideWindowSize)
      {
          checkArgument(slideWindowSize > 0, "slideWindowSize must be positive");
          blockCompressionState.slideWindow(slideWindowSize);
      }
  
      public void commit()
      {
          offsets.commit();
          huffmanContext.saveChanges();
      }
  }
  