Function luaH_realasize

3rd/lua-5.4.3/src/ltable.c:241–259

** Returns the real size of the 'array' array */

** Returns the real size of the 'array' array
*/
LUAI_FUNC unsigned int luaH_realasize (const Table *t) {
  if (limitequalsasize(t))
    return t->alimit;  /* this is the size */
  else {
    unsigned int size = t->alimit;
    /* compute the smallest power of 2 not smaller than 'n' */
    size |= (size >> 1);
    size |= (size >> 2);
    size |= (size >> 4);
    size |= (size >> 8);
    size |= (size >> 16);
#if (UINT_MAX >> 30) > 3
    size |= (size >> 32);  /* unsigned int has more than 32 bits */
#endif
    size++;
    lua_assert(ispow2(size) && size/2 < t->alimit && t->alimit < size);
    return size;
  }
}


/*