Function newbuffsize

lua/src/lauxlib.c:531–538

** Compute new size for buffer 'B', enough to accommodate extra 'sz' ** bytes. */

** bytes.
*/
static size_t newbuffsize (luaL_Buffer *B, size_t sz) {
  size_t newsize = B->size * 2;  /* double buffer size */
  if (l_unlikely(MAX_SIZET - sz < B->n))  /* overflow in (B->n + sz)? */
    return luaL_error(B->L, "buffer too large");
  if (newsize < B->n + sz)  /* double is not big enough? */
    newsize = B->n + sz;
  return newsize;
}


/*