in src/main/java/org/apache/commons/codec/digest/MurmurHash3.java [919:949]
public static int hash32x86(final byte[] data, final int offset, final int length, final int seed) {
int hash = seed;
final int nblocks = length >> 2;
// body
for (int i = 0; i < nblocks; i++) {
final int index = offset + (i << 2);
final int k = getLittleEndianInt(data, index);
hash = mix32(k, hash);
}
// tail
final int index = offset + (nblocks << 2);
int k1 = 0;
switch (offset + length - index) {
case 3:
k1 ^= (data[index + 2] & 0xff) << 16;
// falls-through
case 2:
// falls-through
k1 ^= (data[index + 1] & 0xff) << 8;
// falls-through
case 1:
k1 ^= data[index] & 0xff;
// mix functions
k1 *= C1_32;
k1 = Integer.rotateLeft(k1, R1_32);
k1 *= C2_32;
hash ^= k1;
}
hash ^= length;
return fmix32(hash);
}