1415 static void updateHashChain(Hash* hash, size_t wpos, int hashval)  in updateHashChain()  argument
1417   hash->val[wpos] = hashval;  in updateHashChain()
1418   if(hash->head[hashval] != -1) hash->chain[wpos] = hash->head[hashval];  in updateHashChain()
1419   hash->head[hashval] = wpos;  in updateHashChain()
1447   unsigned hashval;  in encodeLZ77()  local
1462     hashval = getHash(in, insize, pos);  in encodeLZ77()
1463     updateHashChain(hash, wpos, hashval);  in encodeLZ77()
1465     if(usezeros && hashval == 0)  in encodeLZ77()
1480     prevpos = hash->head[hashval];  in encodeLZ77()
1501 …    if(usezeros && hashval == 0 && hash->val[hashpos] == 0 /*hashval[hashpos] may be out of date*/)  in encodeLZ77()
1554 …hash->head[hashval] = -1; /*the same hashchain update will be done, this ensures no wrong alterati…  in encodeLZ77()
1579         hashval = getHash(in, insize, pos);  in encodeLZ77()
1580         updateHashChain(hash, wpos, hashval);  in encodeLZ77()
1581         if(usezeros && hashval == 0)  in encodeLZ77()