Method unpackDictionaryData

java/org/brotli/dec/DictionaryData.java:40–72

(ByteBuffer dictionary, String data0, String data1,
      String skipFlip, int[] sizeBits, String sizeBitsData)

  private static final int DICTIONARY_DATA_DEBUG = Utils.isDebugMode();

  private static void unpackDictionaryData(ByteBuffer dictionary, String data0, String data1,
      String skipFlip, int[] sizeBits, String sizeBitsData) {
    // Initialize lower 7 bits of every byte in the dictionary.
    final byte[] dict = Utils.toUsAsciiBytes(data0 + data1);
    final int[] skipFlipRunes = Utils.toUtf8Runes(skipFlip);
    if (DICTIONARY_DATA_DEBUG != 0) {
      if (dict.length != dictionary.capacity()) {
        throw new RuntimeException("Corrupted brotli dictionary");
      }
    }

    // Toggle high bit using run-length delta encoded "skipFlip".
    int offset = 0;
    final int n = skipFlipRunes.length >> 1;
    for (int i = 0; i < n; ++i) {
      final int skip = skipFlipRunes[2 * i] - 36;
      final int flip = skipFlipRunes[2 * i + 1] - 36;
      for (int j = 0; j < skip; ++j) {
        dict[offset] = (byte) ((int) dict[offset] ^ 3);
        offset++;
      }
      for (int j = 0; j < flip; ++j) {
        dict[offset] = (byte) ((int) dict[offset] ^ 236);
        offset++;
      }
    }

    for (int i = 0; i < sizeBitsData.length(); ++i) {
      sizeBits[i] = (int) sizeBitsData.charAt(i) - 65;
    }

    dictionary.put(dict);
  }

  static {
    final ByteBuffer dictionaryData = ByteBuffer.allocateDirect(122784);