scx/c/xlib/event.c

#include "xlib.h"
#include "scheme48.h"

#define ECAST(name, type) type* name = (type*)e
#define sidx 5
#define SET(i, v) S48_VECTOR_SET(r, i, v)
#define SETSIZE(i) r = s48_make_vector(sidx+i, S48_FALSE)

s48_value scx_enter_event(XEvent* e) {
  s48_value r = S48_FALSE;
  s48_value temp = S48_FALSE;
  int i;
  S48_DECLARE_GC_PROTECT(2);
  S48_GC_PROTECT_2(r, temp);

  switch (e->type) {

  case KeyPress : case KeyRelease : 
  case ButtonPress : case ButtonRelease :
  case MotionNotify : {
    ECAST(q, XKeyEvent);
    SETSIZE(10);
    // all equal in the beginning
    SET(sidx+0, SCX_ENTER_WINDOW(q->root));
    SET(sidx+1, SCX_ENTER_WINDOW(q->subwindow));
    SET(sidx+2, SCX_ENTER_TIME(q->time));
    SET(sidx+3, s48_enter_fixnum(q->x));
    SET(sidx+4, s48_enter_fixnum(q->y));
    SET(sidx+5, s48_enter_fixnum(q->x_root));
    SET(sidx+6, s48_enter_fixnum(q->y_root));
    SET(sidx+7, s48_enter_fixnum(q->state));
    // now they are different
    switch (e->type) {
    case KeyPress : case KeyRelease : {
      SET(sidx+8, s48_enter_fixnum(q->keycode));
      SET(sidx+9, S48_ENTER_BOOLEAN(q->same_screen));
    } break;
    case ButtonPress : case ButtonRelease : {
      ECAST(q, XButtonEvent);
      SET(sidx+8, s48_enter_integer(q->button));
      SET(sidx+9, S48_ENTER_BOOLEAN(q->same_screen));
    } break;
    case MotionNotify : {
      ECAST(q, XMotionEvent);
      SET(sidx+8, s48_enter_fixnum(q->is_hint));
      SET(sidx+9, S48_ENTER_BOOLEAN(q->same_screen));
    } break;
    }
  } break;

  case EnterNotify : case LeaveNotify : {
    ECAST(q, XCrossingEvent);
    SETSIZE(12);
    SET(sidx+0, SCX_ENTER_WINDOW(q->root));
    SET(sidx+1, SCX_ENTER_WINDOW(q->subwindow));
    SET(sidx+2, SCX_ENTER_TIME(q->time));
    SET(sidx+3, s48_enter_fixnum(q->x));
    SET(sidx+4, s48_enter_fixnum(q->y));
    SET(sidx+5, s48_enter_fixnum(q->x_root));
    SET(sidx+6, s48_enter_fixnum(q->y_root));
    SET(sidx+7, s48_enter_integer(q->mode));
    SET(sidx+8, s48_enter_integer(q->detail));
    SET(sidx+9, S48_ENTER_BOOLEAN(q->same_screen));
    SET(sidx+10, S48_ENTER_BOOLEAN(q->focus));
    // Elk does this; but why not State_Syms??
    SET(sidx+11, s48_enter_integer(q->state));
  } break;

  case FocusIn : case FocusOut : {
    ECAST(q, XFocusChangeEvent);
    SETSIZE(2);
    SET(sidx+0, s48_enter_integer(q->mode));
    SET(sidx+1, s48_enter_integer(q->detail));
  } break;

  case KeymapNotify : {
    ECAST(q, XKeymapEvent);
    SETSIZE(1);
    temp = s48_make_vector(32*8, s48_enter_integer(0));
    for (i=0; i < 32; i++) {
      int j;
      char b = q->key_vector[i];
      for (j = 0; j < 8; j++)
	S48_VECTOR_SET(temp, i*8 + j, (b & (1 << j)) ? 1 : 0);
    }
    SET(sidx+0, temp);
  } break;

  case Expose : {
    ECAST(q, XExposeEvent);
    SETSIZE(5);
    SET(sidx+0, s48_enter_fixnum(q->x));
    SET(sidx+1, s48_enter_fixnum(q->y));
    SET(sidx+2, s48_enter_fixnum(q->width));
    SET(sidx+3, s48_enter_fixnum(q->height));
    SET(sidx+4, s48_enter_fixnum(q->count));
  } break;
    
  case GraphicsExpose : {
    ECAST(q, XGraphicsExposeEvent);
    SETSIZE(7);
    // the ->window member is only a drawable here! ??
    SET(sidx+0, s48_enter_fixnum(q->x));
    SET(sidx+1, s48_enter_fixnum(q->y));
    SET(sidx+2, s48_enter_fixnum(q->width));
    SET(sidx+3, s48_enter_fixnum(q->height));
    SET(sidx+4, s48_enter_fixnum(q->count));
    SET(sidx+5, s48_enter_integer(q->major_code));
    SET(sidx+6, s48_enter_integer(q->minor_code));
  } break;
  
  case NoExpose : {
    ECAST(q, XNoExposeEvent);
    SETSIZE(2);
    SET(sidx+0, s48_enter_integer(q->major_code));
    SET(sidx+1, s48_enter_integer(q->minor_code));
  } break;
  
  case VisibilityNotify : {
    ECAST(q, XVisibilityEvent);
    SETSIZE(1);
    SET(sidx+0, s48_enter_integer(q->state));
  } break;

  case CreateNotify : {
    ECAST(q, XCreateWindowEvent);
    SETSIZE(7);
    SET(sidx+0, SCX_ENTER_WINDOW(q->window));
    SET(sidx+1, s48_enter_fixnum(q->x));
    SET(sidx+2, s48_enter_fixnum(q->y));
    SET(sidx+3, s48_enter_fixnum(q->width));
    SET(sidx+4, s48_enter_fixnum(q->height));
    SET(sidx+5, s48_enter_fixnum(q->border_width));
    SET(sidx+6, S48_ENTER_BOOLEAN(q->override_redirect));
  } break;

  case DestroyNotify : {
    ECAST(q, XDestroyWindowEvent);
    SETSIZE(1);
    SET(sidx+0, SCX_ENTER_WINDOW(q->window));
  } break;

  case UnmapNotify : {
    ECAST(q, XUnmapEvent);
    SETSIZE(2);
    SET(sidx+0, SCX_ENTER_WINDOW(q->window));
    SET(sidx+1, S48_ENTER_BOOLEAN(q->from_configure));
  } break;

  case MapNotify : {
    ECAST(q, XMapEvent);
    SETSIZE(2);
    SET(sidx+0, SCX_ENTER_WINDOW(q->window));
    SET(sidx+1, S48_ENTER_BOOLEAN(q->override_redirect));
  } break;

  case MapRequest : {
    ECAST(q, XMapRequestEvent);
    SETSIZE(1);
    SET(sidx+0, SCX_ENTER_WINDOW(q->window));
  } break;
  
  case ReparentNotify : {
    ECAST(q, XReparentEvent);
    SETSIZE(5);
    SET(sidx+0, SCX_ENTER_WINDOW(q->window));
    SET(sidx+1, SCX_ENTER_WINDOW(q->parent));
    SET(sidx+2, s48_enter_fixnum(q->x));
    SET(sidx+3, s48_enter_fixnum(q->y));
    SET(sidx+4, S48_ENTER_BOOLEAN(q->override_redirect));
  } break;

  case ConfigureNotify : {
    ECAST(q, XConfigureEvent);
    SETSIZE(8);
    SET(sidx+0, SCX_ENTER_WINDOW(q->window));
    SET(sidx+1, s48_enter_fixnum(q->x));
    SET(sidx+2, s48_enter_fixnum(q->y));
    SET(sidx+3, s48_enter_fixnum(q->width));
    SET(sidx+4, s48_enter_fixnum(q->height));
    SET(sidx+5, s48_enter_fixnum(q->border_width));
    SET(sidx+6, SCX_ENTER_WINDOW(q->above));
    SET(sidx+7, S48_ENTER_BOOLEAN(q->override_redirect));
  } break;

  case ConfigureRequest : {
    ECAST(q, XConfigureRequestEvent);
    SETSIZE(9);
    SET(sidx+0, SCX_ENTER_WINDOW(q->window));
    SET(sidx+1, s48_enter_fixnum(q->x));
    SET(sidx+2, s48_enter_fixnum(q->y));
    SET(sidx+3, s48_enter_fixnum(q->width));
    SET(sidx+4, s48_enter_fixnum(q->height));
    SET(sidx+5, s48_enter_fixnum(q->border_width));
    SET(sidx+6, SCX_ENTER_WINDOW(q->above));
    SET(sidx+7, s48_enter_integer(q->detail));
    SET(sidx+8, s48_enter_integer(q->value_mask));
  } break;

  case GravityNotify : {
    ECAST(q, XGravityEvent);
    SETSIZE(3);
    SET(sidx+0, SCX_ENTER_WINDOW(q->window));
    SET(sidx+1, s48_enter_fixnum(q->x));
    SET(sidx+2, s48_enter_fixnum(q->y));
  } break;
    
  case ResizeRequest : {
    ECAST(q, XResizeRequestEvent);
    SETSIZE(2);
    SET(sidx+0, s48_enter_fixnum(q->width));
    SET(sidx+1, s48_enter_fixnum(q->height));
  } break;

  case CirculateRequest : {
    ECAST(q, XCirculateEvent);
    SETSIZE(2);
    SET(sidx+0, SCX_ENTER_WINDOW(q->window));
    SET(sidx+1, s48_enter_integer(q->place));
  } break;

  case PropertyNotify : {
    ECAST(q, XPropertyEvent);
    SETSIZE(3);
    SET(sidx+0, SCX_ENTER_ATOM(q->atom));
    SET(sidx+1, SCX_ENTER_TIME(q->time));
    SET(sidx+2, s48_enter_integer(q->state));
  } break;

  case SelectionClear : {
    ECAST(q, XSelectionClearEvent);
    SETSIZE(2);
    SET(sidx+0, SCX_ENTER_ATOM(q->selection));
    SET(sidx+1, SCX_ENTER_TIME(q->time));
  } break;
  
  case SelectionRequest : {
    ECAST(q, XSelectionRequestEvent);
    SETSIZE(5);
    SET(sidx+0, SCX_ENTER_WINDOW(q->requestor));
    SET(sidx+1, SCX_ENTER_ATOM(q->selection));
    SET(sidx+2, SCX_ENTER_ATOM(q->target));
    SET(sidx+3, SCX_ENTER_ATOM(q->property));
    SET(sidx+4, SCX_ENTER_TIME(q->time));
  } break;

  case SelectionNotify : {
    ECAST(q, XSelectionEvent);
    SETSIZE(4);
    SET(sidx+0, SCX_ENTER_ATOM(q->selection));
    SET(sidx+1, SCX_ENTER_ATOM(q->target));
    SET(sidx+2, SCX_ENTER_ATOM(q->property));
    SET(sidx+3, SCX_ENTER_TIME(q->time));
  } break;

  case ColormapNotify : {
    ECAST(q, XColormapEvent);
    SETSIZE(3);
    SET(sidx+0, SCX_ENTER_COLORMAP(q->colormap));
    SET(sidx+1, S48_ENTER_BOOLEAN(q->new));
    SET(sidx+2, s48_enter_integer(q->state));
  } break;
  
  case ClientMessage : {
    ECAST(q, XClientMessageEvent);
    SETSIZE(3);
    SET(sidx+0, SCX_ENTER_ATOM(q->message_type));
    SET(sidx+1, s48_enter_integer(q->format));
    switch (q->format) {
    case 8 : {
      temp = s48_make_string(20, (char)0);
      for (i=0; i < 20; i++)
	S48_STRING_SET(temp, i, q->data.b[i]);
    } break;
    case 16 : {
      temp = s48_make_vector(10, S48_FALSE);
      for (i=0; i < 10; i++)
	S48_VECTOR_SET(temp, i, s48_enter_fixnum(q->data.s[i]));
    } break;
    case 32 : {
      temp = s48_make_vector(5, S48_FALSE);
      for (i=0; i < 5; i++)
	S48_VECTOR_SET(temp, i, s48_enter_integer(q->data.l[i]));
    } break;
    default : temp = s48_enter_integer(q->format); //??
    }

    SET(sidx+2, temp);
  } break;

  case MappingNotify : {
    ECAST(q, XMappingEvent);
    SETSIZE(3);
    SET(sidx+0, s48_enter_integer(q->request));
    SET(sidx+1, s48_enter_integer(q->first_keycode));
    SET(sidx+2, s48_enter_fixnum(q->count));
  } break;

  default: {
    SETSIZE(0);
  } break;

  } // switch end

  // XAnyEvent entries
  {
    ECAST(q, XAnyEvent);
    SET(0, s48_enter_integer(q->type));
    SET(1, s48_enter_integer(q->serial));
    SET(2, S48_ENTER_BOOLEAN(q->send_event));
    SET(3, SCX_ENTER_DISPLAY(q->display));
    SET(4, SCX_ENTER_WINDOW(q->window));
  }
  // more??
  
  S48_GC_UNPROTECT();
  return r;
}

#define REF(i) S48_VECTOR_REF(v, i)

XEvent scx_extract_event(s48_value type, s48_value v) {
  XEvent e;

  e.xany.type = s48_extract_integer(REF(0));
  e.xany.serial = s48_extract_integer(REF(1));
  e.xany.send_event = S48_EXTRACT_BOOLEAN(REF(2));
  e.xany.display = SCX_EXTRACT_DISPLAY(REF(3));

  switch (s48_extract_integer(type)) {
  case KeyPress: case KeyRelease: {
    e.xkey.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xkey.root = SCX_EXTRACT_WINDOW(REF(5));
    e.xkey.subwindow = SCX_EXTRACT_WINDOW(REF(6));
    e.xkey.time = SCX_EXTRACT_TIME(REF(7));
    e.xkey.x = s48_extract_integer(REF(8));
    e.xkey.y = s48_extract_integer(REF(9));
    e.xkey.x_root = s48_extract_integer(REF(10));
    e.xkey.y_root = s48_extract_integer(REF(11));
    e.xkey.state = s48_extract_integer(REF(12));
    e.xkey.keycode = s48_extract_integer(REF(13));
    e.xkey.same_screen = S48_EXTRACT_BOOLEAN(REF(14));
  } break;
  case ButtonPress: case ButtonRelease: {
    e.xbutton.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xbutton.root = SCX_EXTRACT_WINDOW(REF(5));
    e.xbutton.subwindow = SCX_EXTRACT_WINDOW(REF(6));
    e.xbutton.time = SCX_EXTRACT_TIME(REF(7));
    e.xbutton.x = s48_extract_integer(REF(8));
    e.xbutton.y = s48_extract_integer(REF(9));
    e.xbutton.x_root = s48_extract_integer(REF(10));
    e.xbutton.y_root = s48_extract_integer(REF(11));
    e.xbutton.state = s48_extract_integer(REF(12));
    e.xbutton.button = s48_extract_integer(REF(13));
    e.xbutton.same_screen = S48_EXTRACT_BOOLEAN(REF(14));
  } break;
  case MotionNotify: {
    e.xmotion.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xmotion.root = SCX_EXTRACT_WINDOW(REF(5));
    e.xmotion.subwindow = SCX_EXTRACT_WINDOW(REF(6));
    e.xmotion.time = SCX_EXTRACT_TIME(REF(7));
    e.xmotion.x = s48_extract_integer(REF(8));
    e.xmotion.y = s48_extract_integer(REF(9));
    e.xmotion.x_root = s48_extract_integer(REF(10));
    e.xmotion.y_root = s48_extract_integer(REF(11));
    e.xmotion.state = s48_extract_integer(REF(12));
    e.xmotion.is_hint = s48_extract_integer(REF(13));
    e.xmotion.same_screen = S48_EXTRACT_BOOLEAN(REF(14));
  } break;
  case EnterNotify: case LeaveNotify: {
    e.xcrossing.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xcrossing.root = SCX_EXTRACT_WINDOW(REF(5));
    e.xcrossing.subwindow = SCX_EXTRACT_WINDOW(REF(6));
    e.xcrossing.time = SCX_EXTRACT_TIME(REF(7));
    e.xcrossing.x = s48_extract_integer(REF(8));
    e.xcrossing.y = s48_extract_integer(REF(9));
    e.xcrossing.x_root = s48_extract_integer(REF(10));
    e.xcrossing.y_root = s48_extract_integer(REF(11));
    e.xcrossing.mode = s48_extract_integer(REF(12));
    e.xcrossing.detail = s48_extract_integer(REF(13));
    e.xcrossing.same_screen = S48_EXTRACT_BOOLEAN(REF(14));
    e.xcrossing.focus = S48_EXTRACT_BOOLEAN(REF(15));
    e.xcrossing.state = s48_extract_integer(REF(16));
  } break;
  case Expose: {
    e.xexpose.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xexpose.x = s48_extract_integer(REF(5));
    e.xexpose.y = s48_extract_integer(REF(6));
    e.xexpose.width = s48_extract_integer(REF(7));
    e.xexpose.height = s48_extract_integer(REF(8));
    e.xexpose.count = s48_extract_integer(REF(9));
  } break;
  case GraphicsExpose: {
    e.xgraphicsexpose.drawable = SCX_EXTRACT_WINDOW(REF(4));
    e.xgraphicsexpose.x = s48_extract_integer(REF(5));
    e.xgraphicsexpose.y = s48_extract_integer(REF(6));
    e.xgraphicsexpose.width = s48_extract_integer(REF(7));
    e.xgraphicsexpose.height = s48_extract_integer(REF(8));
    e.xgraphicsexpose.count = s48_extract_integer(REF(9));
    e.xgraphicsexpose.major_code = s48_extract_integer(REF(10));
    e.xgraphicsexpose.minor_code = s48_extract_integer(REF(11));
  } break;
  case NoExpose: {
    e.xnoexpose.drawable = SCX_EXTRACT_WINDOW(REF(4));
    e.xnoexpose.major_code = s48_extract_integer(REF(5));
    e.xnoexpose.minor_code = s48_extract_integer(REF(6));
  } break;
  case VisibilityNotify: {
    e.xvisibility.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xvisibility.state = s48_extract_integer(REF(5));
  } break;
  case CreateNotify: {
    e.xcreatewindow.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xcreatewindow.x = s48_extract_integer(REF(5));
    e.xcreatewindow.y = s48_extract_integer(REF(6));
    e.xcreatewindow.width = s48_extract_integer(REF(7));
    e.xcreatewindow.height = s48_extract_integer(REF(8));
    e.xcreatewindow.border_width = s48_extract_integer(REF(9));
    e.xcreatewindow.override_redirect = S48_EXTRACT_BOOLEAN(REF(10));
  } break;
  case DestroyNotify: {
    e.xdestroywindow.event = SCX_EXTRACT_WINDOW(REF(4));
    e.xdestroywindow.window = SCX_EXTRACT_WINDOW(REF(5));
  } break;
  case UnmapNotify: {
    e.xunmap.event = SCX_EXTRACT_WINDOW(REF(4));
    e.xunmap.window = SCX_EXTRACT_WINDOW(REF(5));
    e.xunmap.from_configure = S48_EXTRACT_BOOLEAN(REF(6));
  } break;
  case MapNotify: {
    e.xmap.event = SCX_EXTRACT_WINDOW(REF(4));
    e.xmap.window = SCX_EXTRACT_WINDOW(REF(5));
    e.xmap.override_redirect = S48_EXTRACT_BOOLEAN(REF(6));
  } break;
  case MapRequest: {
    e.xmaprequest.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xmaprequest.parent = SCX_EXTRACT_WINDOW(REF(5));
  } break;
  case ReparentNotify: {
    e.xreparent.event = SCX_EXTRACT_WINDOW(REF(4));
    e.xreparent.window = SCX_EXTRACT_WINDOW(REF(5));
    e.xreparent.parent = SCX_EXTRACT_WINDOW(REF(6));
    e.xreparent.x = s48_extract_integer(REF(7));
    e.xreparent.y = s48_extract_integer(REF(8));
    e.xreparent.override_redirect = S48_EXTRACT_BOOLEAN(REF(9));
  } break;
  case ConfigureNotify: {
    e.xconfigure.event = SCX_EXTRACT_WINDOW(REF(4));
    e.xconfigure.window = SCX_EXTRACT_WINDOW(REF(5));
    e.xconfigure.x = s48_extract_integer(REF(6));
    e.xconfigure.y = s48_extract_integer(REF(7));
    e.xconfigure.width = s48_extract_integer(REF(8));
    e.xconfigure.height = s48_extract_integer(REF(9));
    e.xconfigure.border_width = s48_extract_integer(REF(10));
    e.xconfigure.above = SCX_EXTRACT_WINDOW(REF(11));
    e.xconfigure.override_redirect = S48_EXTRACT_BOOLEAN(REF(12));
  } break;
  case GravityNotify: {
    e.xgravity.event = SCX_EXTRACT_WINDOW(REF(4));
    e.xgravity.window = SCX_EXTRACT_WINDOW(REF(5));
    e.xgravity.x = s48_extract_integer(REF(6));
    e.xgravity.y = s48_extract_integer(REF(7));
  } break;
  case ResizeRequest: {
    e.xresizerequest.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xresizerequest.width = s48_extract_integer(REF(5));
    e.xresizerequest.height = s48_extract_integer(REF(6));
  } break;
  case ConfigureRequest: {
    e.xconfigurerequest.parent = SCX_EXTRACT_WINDOW(REF(4));
    e.xconfigurerequest.window = SCX_EXTRACT_WINDOW(REF(5));
    {
      XWindowChanges WC;
      unsigned long mask = Changes_To_XWindowChanges(REF(6), &WC);
      e.xconfigurerequest.x = WC.x;
      e.xconfigurerequest.y = WC.y;
      e.xconfigurerequest.width = WC.width;
      e.xconfigurerequest.height = WC.height;
      e.xconfigurerequest.border_width = WC.border_width;
      e.xconfigurerequest.above = WC.sibling;
      e.xconfigurerequest.detail = WC.stack_mode;
      e.xconfigurerequest.value_mask = mask;
    }
  } break;
  case CirculateNotify: {
    e.xcirculate.event = SCX_EXTRACT_WINDOW(REF(4));
    e.xcirculate.window = SCX_EXTRACT_WINDOW(REF(5));
    e.xcirculate.place = s48_extract_integer(REF(6));
  } break;
  case CirculateRequest: {
    e.xcirculaterequest.parent = SCX_EXTRACT_WINDOW(REF(4));
    e.xcirculaterequest.window = SCX_EXTRACT_WINDOW(REF(5));
    e.xcirculaterequest.place = s48_extract_integer(REF(6));
  } break;
  case PropertyNotify: {
    e.xproperty.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xproperty.atom = SCX_EXTRACT_ATOM(REF(5));
    e.xproperty.time = SCX_EXTRACT_TIME(REF(6));
    e.xproperty.state = s48_extract_integer(REF(7));
  } break;
  case SelectionClear: {
    e.xselectionclear.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xselectionclear.selection = SCX_EXTRACT_ATOM(REF(5));
    e.xselectionclear.time = SCX_EXTRACT_TIME(REF(6));
  } break;
  case SelectionRequest: {
    e.xselectionrequest.owner = SCX_EXTRACT_WINDOW(REF(4));
    e.xselectionrequest.requestor = SCX_EXTRACT_WINDOW(REF(5));
    e.xselectionrequest.selection = SCX_EXTRACT_ATOM(REF(6));
    e.xselectionrequest.target = SCX_EXTRACT_ATOM(REF(7));
    e.xselectionrequest.property = SCX_EXTRACT_ATOM(REF(8));
    e.xselectionrequest.time = SCX_EXTRACT_TIME(REF(9));
  } break;
  case SelectionNotify: {
    e.xselection.requestor = SCX_EXTRACT_WINDOW(REF(4));
    e.xselection.selection = SCX_EXTRACT_ATOM(REF(5));
    e.xselection.target = SCX_EXTRACT_ATOM(REF(6));
    e.xselection.property = SCX_EXTRACT_ATOM(REF(7));
    e.xselection.time = SCX_EXTRACT_TIME(REF(8));
  } break;
  case ColormapNotify: {
    e.xcolormap.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xcolormap.colormap = SCX_EXTRACT_COLORMAP(REF(5));
    e.xcolormap.new = S48_EXTRACT_BOOLEAN(REF(6));
    e.xcolormap.state = s48_extract_integer(REF(7));
  } break;
  case ClientMessage: {
    e.xclient.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xclient.message_type = SCX_EXTRACT_ATOM(REF(5));
    e.xclient.format = s48_extract_integer(REF(6));
    {
      s48_value data = REF(7);
      int i;
      for (i = 0; i < S48_VECTOR_LENGTH(data); i++) {
	switch (e.xclient.format) {
	case 8:
	  if (i < 20)
	    e.xclient.data.b[i] =
	      (char)s48_extract_integer(S48_VECTOR_REF(data, i));
	case 16:
	  if (i < 10)
	    e.xclient.data.s[i] =
	      (short)s48_extract_integer(S48_VECTOR_REF(data, i));
	case 32:
	  if (i < 5)
	    e.xclient.data.l[i] =
	      (long)s48_extract_integer(S48_VECTOR_REF(data, i));
	}
      }
    }
  } break;
  case MappingNotify: {
    e.xmapping.window = SCX_EXTRACT_WINDOW(REF(4));
    e.xmapping.request = s48_extract_integer(REF(5));
    e.xmapping.first_keycode = s48_extract_integer(REF(6));
    e.xmapping.count = s48_extract_integer(REF(7));
  } break;
  // Error Event...
  case KeymapNotify: {
    e.xkeymap.window = (Window)0; // not used.
    {
      s48_value bits = REF(4);
      int j, bn;
      char b;
      for (bn = 0; bn < 32; bn++) {
	b = 0;
	for (j = 0; j < 8; j++)
	  b = b | ((char)S48_VECTOR_REF(bits, bn*8 + j) << j);
	e.xkeymap.key_vector[bn] = b;
      }
    }
  } break;
  // default ??
  } // switch.

  return e;
}

s48_value scx_Send_Event(s48_value Xdisplay, s48_value Xwindow,
			 s48_value propagate,
			 s48_value event_mask, s48_value vector,
			 s48_value type) {
  XEvent e = scx_extract_event(type, vector);
  
  Status r = XSendEvent(SCX_EXTRACT_DISPLAY(Xdisplay),
			SCX_EXTRACT_WINDOW(Xwindow),
			S48_EXTRACT_BOOLEAN(propagate),
			s48_extract_integer(event_mask),
			&e);
  return r ? S48_TRUE : S48_FALSE;
}


s48_value scx_Next_Event(s48_value Xdisplay) {
  XEvent e;
  XNextEvent(SCX_EXTRACT_DISPLAY(Xdisplay), &e);
  return scx_enter_event(&e);
}

s48_value scx_Peek_Event(s48_value Xdisplay) {
  XEvent e;
  XPeekEvent(SCX_EXTRACT_DISPLAY(Xdisplay), &e);
  return scx_enter_event(&e);
}

s48_value scx_Events_Pending(s48_value Xdisplay) {
  return s48_enter_integer(XPending(SCX_EXTRACT_DISPLAY(Xdisplay)));
}

s48_value scx_Get_Motion_Events(s48_value Xdisplay, s48_value Xwindow,
			    s48_value from, s48_value to) {
  int n,i;
  XTimeCoord *p = XGetMotionEvents(SCX_EXTRACT_DISPLAY(Xdisplay),
				   SCX_EXTRACT_WINDOW(Xwindow),
				   SCX_EXTRACT_TIME(from),
				   SCX_EXTRACT_TIME(to),
				   &n);
  s48_value v = s48_make_vector(n, S48_FALSE);
  s48_value l = S48_NULL; s48_value t = S48_FALSE;
  S48_DECLARE_GC_PROTECT(3);

  S48_GC_PROTECT_3(v, l, t);
  for (i = 0; i < n; i++) {
    t = s48_enter_fixnum(p[i].y);    l = s48_cons(t, S48_NULL);
    t = s48_enter_fixnum(p[i].x);    l = s48_cons(t, l);
    t = SCX_ENTER_TIME(p[i].time);   l = s48_cons(t, l);

    S48_VECTOR_SET(v, i, l);
  }
  XFree((char*)p);
  S48_GC_UNPROTECT();

  return v;
}

s48_value scx_add_pending_channel (channel){
  int socket_fd;
  S48_CHECK_CHANNEL(channel);
  socket_fd = S48_UNSAFE_EXTRACT_FIXNUM(S48_UNSAFE_CHANNEL_OS_INDEX(channel));

  if (! s48_add_pending_fd(socket_fd, 1)) // 1 for: yes, is input 
    s48_raise_out_of_memory_error();

  return S48_UNSPECIFIC;
}
void scx_init_event(void) {
  S48_EXPORT_FUNCTION(scx_Send_Event);
  S48_EXPORT_FUNCTION(scx_Next_Event);
  S48_EXPORT_FUNCTION(scx_Peek_Event);
  S48_EXPORT_FUNCTION(scx_Events_Pending);
  S48_EXPORT_FUNCTION(scx_Get_Motion_Events);
  S48_EXPORT_FUNCTION(scx_add_pending_channel);
}