I was in the need to have a hash function for strings. I copied some code from
stackoverflow.com and it didn't work for strings "aa", "aaa", and so on, so I modified it a little bit. However, I don't know if it is stable - but it works for me.
Have fun:
long str_hash (STRING* str) {
int c;
long hash = 5381;
char* cstr = _chr(str);
int index;
while (c = *cstr++, index++) {
hash = (((hash << str_len(str)) + hash) + c + str_len(str));
}
return hash;
}