1 // cl_string hashcode().
12 unsigned long hashcode (const cl_string& str)
14 var unsigned long code = 0x61284AF3;
15 // We walk through all characters. It may take some time for very
16 // long strings, but it's better than completely ignoring some characters.
17 var long len = str.length();
18 var const char * ptr = str.asciz();
19 for (; len > 0; len--) {
20 var unsigned char c = *ptr++;
21 code = (code << 5) | (code >> 27); // rotate left 5 bits
22 code += (long)c << 16;