B4R Question Call inline c sub, pass B4R object

[Mostez]

I want to call this sub from inlice C code, this code (calldrawrect) did not work it is just for explanation. Something like,

void calldrawrect{
    B4R::Array* b;
    B4R::Object* o;
    
    char* c = (char*)b->data;
    c[0] = 0;
    c[1] = 0;
    c[2] = 20;
    c[3] = 20;
    o = b;
    B4RdrawRect(o);
}

void B4RdrawRect(B4R::Object* o){
B4R::Array* b = (B4R::Array*)B4R::Object::toPointer(o);
char* c = (char*)b->data;
int x1 = (c[0]);
int y1 = (c[1]);
int x2 = (c[2]);
int y2 = (c[3]);
    int tmp;

    if (x1>x2)
    {
        tmp=x1;
        x1=x2;
        x2=tmp;
    }
    if (y1>y2)
    {
        tmp=y1;
        y1=y2;
        y2=tmp;
    }

    drawHLine(x1, y1, x2-x1);
    drawHLine(x1, y2, x2-x1);
    drawVLine(x1, y1, y2-y1);
    drawVLine(x2, y1, y2-y1+1);
}

 

[Erel]

I don't understand the code in calldrawrect. It cannot work. Why work hard? Use global int variables.

 

[Mostez]

the code in calldrawrect is for calling B4RdrawRect,

It cannot work

it is just pseudocode, I want to create object and pass it to B4RdrawRect.