🚀 go-pugleaf

Hello computing world.

I'm writing a drawing program.  I wrote the following mouse library to work
in conjuction with an interface library I wrote to implement button pushes
and stuff like that.

Only problem is, sometimes the mouseDown() call doesn't work!  It usually
has problems after a call to lastLeftDown().  I have no
idea why.  Perhaps I'm missing an interrupt somewhere or something?  BTW
if you're really interested there are about a million other bugs I can lay
on you -- but we'll go one at a time for now.

o /                                    o /
 X ------------------------------------ X ---------------------------------
O \                                    O \

int mouseDown()
{
    struct REGPACK r;

    r.r_ax = 3;
    intr(0x33,&r);
    if (r.r_bx > 0)
        return 1;
    return 0;
}
point *lastLeftUp(int *num)
{
    struct REGPACK r;
    point *p;

    r.r_ax = 6;
    r.r_bx = 0;
    intr(0x33, &r);
    *num = r.r_bx;
    if (r.r_bx == 0) return NULL;
    p = (point *)(malloc(sizeof(point)));
    p->x = r.r_cx;
    p->y = r.r_dx;

    return p;
}

point *lastLeftDown(int *num)
{
    struct REGPACK r;
    point *p;

    r.r_ax = 5;
    r.r_bx = 0;
    intr(0x33, &r);
    *num = r.r_bx;
    if (r.r_bx == 0) return NULL;
    p = (point *)(mmalloc(sizeof(point)));
    p->x = r.r_cx;
    p->y = r.r_dx;

    return p;
}

void initMouse()
{
    struct REGPACK r;

    r.r_ax = 0;
    intr(0x33, &r);
    showMouse();

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Please e-mail your wisdoms to w5y092@rick.cs.ubc.ca
Thanks!