Function resizebox

lib/lua/src/lauxlib.c:476–488

static void *resizebox (lua_State *L, int idx, size_t newsize) {
  void *ud;
  lua_Alloc allocf = lua_getallocf(L, &ud);
  UBox *box = (UBox *)lua_touserdata(L, idx);
  void *temp = allocf(ud, box->box, box->bsize, newsize);
  if (l_unlikely(temp == NULL && newsize > 0)) {  /* allocation error? */
    lua_pushliteral(L, "not enough memory");
    lua_error(L);  /* raise a memory error */
  }
  box->box = temp;
  box->bsize = newsize;
  return temp;
}


static int boxgc (lua_State *L) {