isl_gmp.c

   1 #include "isl_int.h"
   2
   3 u_int32_t isl_gmp_hash(mpz_t v, u_int32_t hash)
   4 {
   5         int sa = v[0]._mp_size;
   6         int abs_sa = sa < 0 ? -sa : sa;
   7         unsigned char *data = (unsigned char *)v[0]._mp_d;
   8         unsigned char *end = data + abs_sa * sizeof(v[0]._mp_d[0]);
   9
  10         if (sa < 0) {
  11                 hash *= 16777619;
  12                 hash ^= 0xFF;
  13         }
  14         for (; data < end; ++data) {
  15                 hash *= 16777619;
  16                 hash ^= *data;
  17         }
  18         return hash;
  19 }