/* gcc test-invalid-net-wm-icon.c -o test-invalid-net-wm-icon -lX11 */

#include <stdlib.h>
#include <stdio.h>
#include <assert.h>

#include <X11/Xlib.h>

Display *d;
Window w;
Atom net_wm_icon;
Atom cardinal;

void test(unsigned int *buffer, unsigned int buffer_length)
{
  int length = buffer_length/sizeof(unsigned int);
  XChangeProperty(d, w, net_wm_icon, cardinal, 32,
                  PropModeReplace, (const unsigned char*) buffer, length);

  XFlush(d);
  sleep(1);
}

int main(int argc, char **argv)
{
    /* Invalid _NET_WM_ICON icons */
    d = XOpenDisplay(0);
    int s = DefaultScreen(d);
    net_wm_icon = XInternAtom(d, "_NET_WM_ICON", False);
    cardinal = XInternAtom(d, "CARDINAL", False);
    XEvent e;
    w = XCreateWindow(d, RootWindow(d, s), 0, 0, 200, 200, 0,
                      CopyFromParent, InputOutput, CopyFromParent, 0, 0);

    XMapWindow(d, w);
    XFlush(d);
    sleep(1);

    // sizes are just absurd
    unsigned int buffer[] = {-1, -1, 0xFFFFFFFF, 0xFFFFFFFF};
    test(buffer, sizeof(buffer));

    // sizes are still just absurd
    unsigned int buffer1[] = {0x80000001, 0x80000001, 0xFFFFFFFF, 0xFFFFFFFF};
    test(buffer1, sizeof(buffer1));

    // property should be 256K, but is only 64K
    int propsize = 0x10000;
    unsigned int *buffer2 = malloc(propsize);
    buffer2[0] = 512;
    buffer2[1] = 512;
    test(buffer2, propsize);

    // property is absurdly large, but still not enough for icon
    propsize = 0x100000;
    unsigned int *buffer3 = malloc(propsize);
    assert(buffer3);
    buffer3[0] = 0x3000;
    buffer3[1] = 0x3000;
    test(buffer3, propsize);

    while(1) XNextEvent(d, &e);
}