Function resizebox

depends/lua/src/lauxlib.c:461–473

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 (temp == NULL && newsize > 0) {  /* allocation error? */
    resizebox(L, idx, 0);  /* free buffer */
    luaL_error(L, "not enough memory for buffer allocation");
  }
  box->box = temp;
  box->bsize = newsize;
  return temp;
}


static int boxgc (lua_State *L) {