I want +=, -=, *=, /= and div

See topic title. The first four would be helpful keystroke-savers, and the latter is useful when trying to work out how many 16s are in a sprite's y value.

What does "div" do?

Well in any case the following have been added to the ZScript language in b14:
+=
-=
*=
/=
&&=
||=
&=
|=
^=
<<=
>>=
%=

Div is integer division. Think of it as the counterpart to mod.

Alternatively, you could add floor() (and ceiling()).

I don't think adding those to the language itself is necessary, but I will add the following functions to std.zh, the ZScript standard header that will be included in b14:

Code:

---

//some utility routines
int Floor(int x) {
        if(x < 0)
                return (x-.9999)<<0;
        return x<<0;
}

int Ceiling(int x) {
        if(x < 0)
                return x<<0;
        return (x+.9999)<<0;
}

---

std.zh will also include constants like SFX_STAIRS for sound effects and item classes.

Actually div() would be a really useful function. Div would essentially be the equivalent of:

Code:

---

result = x / y;
if(result > 0)
{
  result = Floor(result);
}
else
{
  result = Ceiling(result);
}

---

Added.