private void fillHashTable(List<ChecksumPair> list) {
int i = 16;
// spocteme velikost hashtable podle poctu bloku dat
while ((2 << (i - 1)) > blockNum && i > 4) {
i--;
}
// vytvorime hashtable o velikosti 2^i (max. 2^16, min. 2^4)
hashtable = new ChainingHash(2 << (i - 1));
for (ChecksumPair pair : list) {
hashtable.insert(pair);
}
}
/**
* Fills a chaining hash table with ChecksumPairs
*
* @param checksums Byte array with bytes of whole metafile
*/
private void fillHashTable(byte[] checksums) {
int i = 16;
// spocteme velikost hashtable podle poctu bloku dat
while ((2 << (i - 1)) > blockNum && i > 4) {
i--;
}
// vytvorime hashtable o velikosti 2^i (max. 2^16, min. 2^4)
hashtable = new ChainingHash(2 << (i - 1));
ChecksumPair p = null;
// Link item;
int offset = 0;
int weakSum = 0;
int seq = 0;
int off = fileOffset;
byte[] weak = new byte[4];
byte[] strongSum = new byte[headers.getChecksumBytes()];
while (seq < blockNum) {
for (int w = 0; w < headers.getRsumButes(); w++) {
weak[w] = checksums[off];
off++;
}
for (int s = 0; s < strongSum.length; s++) {
strongSum[s] = checksums[off];
off++;
}
weakSum = 0;
weakSum += (weak[2] & 0x000000FF) << 24;
weakSum += (weak[3] & 0x000000FF) << 16;
weakSum += (weak[0] & 0x000000FF) << 8;
weakSum += (weak[1] & 0x000000FF);
p = new ChecksumPair(weakSum, strongSum.clone(), offset, headers.blocksize, seq);
offset += headers.blocksize;
seq++;
// item = new Link(p);
hashtable.insert(p);
}
}
