dev/WRAPPERuint64tconstcharssizetlen

void WRAPPER(const void* key, int len, uint32_t seed, void* out) {
  char *buf = (char*)malloc(len + 4);
  memcpy(buf, &seed, 4);
  memcpy(buf + 4, key, len);
  *(uint64_t*)out = FUNCTION(buf, len + 4);
  free(buf);
}