#include "copyright.h"

/* $XConsortium: XQuTree.c,v 11.17 88/09/06 16:04:02 jim Exp $ */
/* Copyright    Massachusetts Institute of Technology    1986	 */

#define NEED_REPLIES
#include "Xlibint.h"

Status
XQueryTree (dpy, w, root, parent, children, nchildren)
  register Display *dpy;
  Window w;
  Window *root;
  Window *parent;		/* RETURN */
  Window **children;		/* RETURN */
  unsigned int *nchildren;	/* RETURN */
{
  long nbytes;
  xQueryTreeReply rep;
  register xResourceReq *req;

  LockDisplay (dpy);
  GetResReq (QueryTree, w, req);
  if (!_XReply (dpy, (xReply *) & rep, 0, xFalse)) {
    UnlockDisplay (dpy);
    SyncHandle ();
    return (0);
  }
  *parent = rep.parent;
  *root = rep.root;
  *nchildren = rep.nChildren;
  *children = (Window *) NULL;
  if (rep.nChildren != 0) {
    nbytes = rep.nChildren * sizeof (Window);
    *children = (Window *) Xmalloc (nbytes);
    nbytes = rep.nChildren * 4;
    _XRead32 (dpy, (char *) *children, nbytes);
  }
  /* Note: won't work if sizeof(Window) is not 32 bits! */
  UnlockDisplay (dpy);
  SyncHandle ();
  return (1);
}