static int murmurHash3_x86_32()

in src/main/java/com/spotify/sparkey/MurmurHash3.java [18:75]

• 38 lines of code
• 5 McCabe index (conditional complexity)

  static int murmurHash3_x86_32(byte[] data, int len, int seed) {
    final int nblocks = len / 4;

    int h1 = seed;

    int c1 = 0xcc9e2d51;
    int c2 = 0x1b873593;

    //----------
    // body

    for (int i = 0; i < nblocks; i++) {
      int k1 = getBlock32(data, 4 * i);

      k1 *= c1;
      k1 = (k1 << 15) | (k1 >>> (32 - 15));
      k1 *= c2;

      h1 ^= k1;
      h1 = (h1 << 13) | (h1 >>> (32 - 13));
      h1 = h1 * 5 + 0xe6546b64;
    }

    //----------
    // tail

    int tail = 4 * nblocks;

    int k1 = 0;

    switch (len & 3) {
      case 3:
        k1 ^= Util.unsignedByte(data[tail + 2]) << 16;
      case 2:
        k1 ^= Util.unsignedByte(data[tail + 1]) << 8;
      case 1:
        k1 ^= Util.unsignedByte(data[tail]);
        k1 *= c1;
        k1 = (k1 << 15) | (k1 >>> (32 - 15));
        k1 *= c2;
        h1 ^= k1;
    }

    //----------
    // finalization

    h1 ^= len;

    int h = h1;
    h ^= h >>> 16;
    h *= 0x85ebca6b;
    h ^= h >>> 13;
    h *= 0xc2b2ae35;
    h ^= h >>> 16;
    h1 = h;

    return h1;
  }