Question Question concerning ShuttleA to Lua conversion

[johnnymanly]

I thought I'd have a hand at converting the ShuttleA to Lua with the goal of adding a tank and srb's.
Some of the code has me stumped. This for example:

SetAnimation (anim_gear, gear_proc);
        TOUCHDOWNVTX tdv[ntdvtx];
        memcpy(tdv, tdvtx, ntdvtx*sizeof(TOUCHDOWNVTX));
        for (int i = 0; i < 4; i++)
            tdv[i].pos.y += gear_proc*0.555;
        SetTouchdownPoints (tdv, ntdvtx);

It's for the "squat" feature. I don't know of any alternative to "memcpy" or "sizeof" in Lua5.1
Is there a way to do it?