Function isSCnumber

3rd/lua-5.4.3/src/lcode.c:1237–1251

** Check whether expression 'e' is a literal integer or float in ** proper range to fit in a register (sB or sC). */

** proper range to fit in a register (sB or sC).
*/
static int isSCnumber (expdesc *e, int *pi, int *isfloat) {
  lua_Integer i;
  if (e->k == VKINT)
    i = e->u.ival;
  else if (e->k == VKFLT && luaV_flttointeger(e->u.nval, &i, F2Ieq))
    *isfloat = 1;
  else
    return 0;  /* not a number */
  if (!hasjumps(e) && fitsC(i)) {
    *pi = int2sC(cast_int(i));
    return 1;
  }
  else
    return 0;
}


/*