libX11 libXinerama mesa git update 1 Feb 2011

1 files changed, 2144 insertions, 2144 deletions

diff --git a/libX11/src/XlibInt.c b/libX11/src/XlibInt.c
index 11e8dfdf8..c385f4cbf 100644
--- a/libX11/src/XlibInt.c
+++ b/libX11/src/XlibInt.c
@@ -1,2144 +1,2144 @@
-/*

-

-Copyright 1985, 1986, 1987, 1998  The Open Group

-

-Permission to use, copy, modify, distribute, and sell this software and its

-documentation for any purpose is hereby granted without fee, provided that

-the above copyright notice appear in all copies and that both that

-copyright notice and this permission notice appear in supporting

-documentation.

-

-The above copyright notice and this permission notice shall be included

-in all copies or substantial portions of the Software.

-

-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

-OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

-IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR

-OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

-OTHER DEALINGS IN THE SOFTWARE.

-

-Except as contained in this notice, the name of The Open Group shall

-not be used in advertising or otherwise to promote the sale, use or

-other dealings in this Software without prior written authorization

-from The Open Group.

-

-*/

-

-/*

- *	XlibInt.c - Internal support routines for the C subroutine

- *	interface library (Xlib) to the X Window System Protocol V11.0.

- */

-

-#ifdef WIN32

-#define _XLIBINT_

-#endif

-#ifdef HAVE_CONFIG_H

-#include <config.h>

-#endif

-#include "Xlibint.h"

-#include "Xprivate.h"

-#include <X11/Xpoll.h>

-#include <assert.h>

-#include <stdio.h>

-#ifdef WIN32

-#include <direct.h>

-#endif

-

-#ifdef XTHREADS

-#include "locking.h"

-

-/* these pointers get initialized by XInitThreads */

-LockInfoPtr _Xglobal_lock = NULL;

-void (*_XCreateMutex_fn)(LockInfoPtr) = NULL;

-/* struct _XCVList *(*_XCreateCVL_fn)() = NULL; */

-void (*_XFreeMutex_fn)(LockInfoPtr) = NULL;

-void (*_XLockMutex_fn)(

-    LockInfoPtr /* lock */

-#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)

-    , char * /* file */

-    , int /* line */

-#endif

-    ) = NULL;

-void (*_XUnlockMutex_fn)(

-    LockInfoPtr /* lock */

-#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)

-    , char * /* file */

-    , int /* line */

-#endif

-    ) = NULL;

-xthread_t (*_Xthread_self_fn)(void) = NULL;

-

-#define XThread_Self()	((*_Xthread_self_fn)())

-

-#endif /* XTHREADS */

-

-/* check for both EAGAIN and EWOULDBLOCK, because some supposedly POSIX

- * systems are broken and return EWOULDBLOCK when they should return EAGAIN

- */

-#ifdef WIN32

-#define ETEST() (WSAGetLastError() == WSAEWOULDBLOCK)

-#else

-#ifdef __CYGWIN__ /* Cygwin uses ENOBUFS to signal socket is full */

-#define ETEST() (errno == EAGAIN || errno == EWOULDBLOCK || errno == ENOBUFS)

-#else

-#if defined(EAGAIN) && defined(EWOULDBLOCK)

-#define ETEST() (errno == EAGAIN || errno == EWOULDBLOCK)

-#else

-#ifdef EAGAIN

-#define ETEST() (errno == EAGAIN)

-#else

-#define ETEST() (errno == EWOULDBLOCK)

-#endif /* EAGAIN */

-#endif /* EAGAIN && EWOULDBLOCK */

-#endif /* __CYGWIN__ */

-#endif /* WIN32 */

-

-#ifdef WIN32

-#define ECHECK(err) (WSAGetLastError() == err)

-#define ESET(val) WSASetLastError(val)

-#else

-#ifdef __UNIXOS2__

-#define ECHECK(err) (errno == err)

-#define ESET(val)

-#else

-#define ECHECK(err) (errno == err)

-#define ESET(val) errno = val

-#endif

-#endif

-

-#if defined(LOCALCONN) || defined(LACHMAN)

-#ifdef EMSGSIZE

-#define ESZTEST() (ECHECK(EMSGSIZE) || ECHECK(ERANGE))

-#else

-#define ESZTEST() ECHECK(ERANGE)

-#endif

-#else

-#ifdef EMSGSIZE

-#define ESZTEST() ECHECK(EMSGSIZE)

-#endif

-#endif

-

-#ifdef __UNIXOS2__

-#include <limits.h>

-#define MAX_PATH _POSIX_PATH_MAX

-#endif

-

-/*

- * The following routines are internal routines used by Xlib for protocol

- * packet transmission and reception.

- *

- * _XIOError(Display *) will be called if any sort of system call error occurs.

- * This is assumed to be a fatal condition, i.e., XIOError should not return.

- *

- * _XError(Display *, xError *) will be called whenever an X_Error event is

- * received.  This is not assumed to be a fatal condition, i.e., it is

- * acceptable for this procedure to return.  However, XError should NOT

- * perform any operations (directly or indirectly) on the DISPLAY.

- *

- * Routines declared with a return type of 'Status' return 0 on failure,

- * and non 0 on success.  Routines with no declared return type don't

- * return anything.  Whenever possible routines that create objects return

- * the object they have created.

- */

-

-#define POLLFD_CACHE_SIZE 5

-

-/* initialize the struct array passed to poll() below */

-Bool _XPollfdCacheInit(

-    Display *dpy)

-{

-#ifdef USE_POLL

-    struct pollfd *pfp;

-

-    pfp = (struct pollfd *)Xmalloc(POLLFD_CACHE_SIZE * sizeof(struct pollfd));

-    if (!pfp)

-	return False;

-    pfp[0].fd = dpy->fd;

-    pfp[0].events = POLLIN;

-

-    dpy->filedes = (XPointer)pfp;

-#endif

-    return True;

-}

-

-void _XPollfdCacheAdd(

-    Display *dpy,

-    int fd)

-{

-#ifdef USE_POLL

-    struct pollfd *pfp = (struct pollfd *)dpy->filedes;

-

-    if (dpy->im_fd_length <= POLLFD_CACHE_SIZE) {

-	pfp[dpy->im_fd_length].fd = fd;

-	pfp[dpy->im_fd_length].events = POLLIN;

-    }

-#endif

-}

-

-/* ARGSUSED */

-void _XPollfdCacheDel(

-    Display *dpy,

-    int fd)			/* not used */

-{

-#ifdef USE_POLL

-    struct pollfd *pfp = (struct pollfd *)dpy->filedes;

-    struct _XConnectionInfo *conni;

-

-    /* just recalculate whole list */

-    if (dpy->im_fd_length <= POLLFD_CACHE_SIZE) {

-	int loc = 1;

-	for (conni = dpy->im_fd_info; conni; conni=conni->next) {

-	    pfp[loc].fd = conni->fd;

-	    pfp[loc].events = POLLIN;

-	    loc++;

-	}

-    }

-#endif

-}

-

-static int sync_hazard(Display *dpy)

-{

-    unsigned long span = dpy->request - dpy->last_request_read;

-    unsigned long hazard = min((dpy->bufmax - dpy->buffer) / SIZEOF(xReq), 65535 - 10);

-    return span >= 65535 - hazard - 10;

-}

-

-static

-void sync_while_locked(Display *dpy)

-{

-#ifdef XTHREADS

-    if (dpy->lock)

-        (*dpy->lock->user_lock_display)(dpy);

-#endif

-    UnlockDisplay(dpy);

-    SyncHandle();

-    InternalLockDisplay(dpy, /* don't skip user locks */ 0);

-#ifdef XTHREADS

-    if (dpy->lock)

-        (*dpy->lock->user_unlock_display)(dpy);

-#endif

-}

-

-void _XSeqSyncFunction(

-    register Display *dpy)

-{

-    xGetInputFocusReply rep;

-    register xReq *req;

-

-    if ((dpy->request - dpy->last_request_read) >= (65535 - BUFSIZE/SIZEOF(xReq))) {

-	GetEmptyReq(GetInputFocus, req);

-	(void) _XReply (dpy, (xReply *)&rep, 0, xTrue);

-	sync_while_locked(dpy);

-    } else if (sync_hazard(dpy))

-	_XSetPrivSyncFunction(dpy);

-}

-

-/* NOTE: only called if !XTHREADS, or when XInitThreads wasn't called. */

-static int

-_XPrivSyncFunction (Display *dpy)

-{

-#if XTHREADS

-    assert(!dpy->lock_fns);

-#endif

-    assert(dpy->synchandler == _XPrivSyncFunction);

-    assert((dpy->flags & XlibDisplayPrivSync) != 0);

-    dpy->synchandler = dpy->savedsynchandler;

-    dpy->savedsynchandler = NULL;

-    dpy->flags &= ~XlibDisplayPrivSync;

-    if(dpy->synchandler)

-        dpy->synchandler(dpy);

-    _XIDHandler(dpy);

-    _XSeqSyncFunction(dpy);

-    return 0;

-}

-

-void _XSetPrivSyncFunction(Display *dpy)

-{

-#ifdef XTHREADS

-    if (dpy->lock_fns)

-        return;

-#endif

-    if (!(dpy->flags & XlibDisplayPrivSync)) {

-	dpy->savedsynchandler = dpy->synchandler;

-	dpy->synchandler = _XPrivSyncFunction;

-	dpy->flags |= XlibDisplayPrivSync;

-    }

-}

-

-void _XSetSeqSyncFunction(Display *dpy)

-{

-    if (sync_hazard(dpy))

-	_XSetPrivSyncFunction (dpy);

-}

-

-#ifdef LONG64

-void _XRead32(

-    Display *dpy,

-    register long *data,

-    long len)

-{

-    register int *buf;

-    register long i;

-

-    if (len) {

-	(void) _XRead(dpy, (char *)data, len);

-	i = len >> 2;

-	buf = (int *)data + i;

-	data += i;

-	while (--i >= 0)

-	    *--data = *--buf;

-    }

-}

-#endif /* LONG64 */

-

-#ifdef WORD64

-

-/*

- * XXX This is a *really* stupid way of doing this....

- * PACKBUFFERSIZE must be a multiple of 4.

- */

-

-#define PACKBUFFERSIZE 4096

-

-

-/*

- * _XRead32 - Read bytes from the socket unpacking each 32 bits

- *            into a long (64 bits on a CRAY computer).

- *

- */

-static void _doXRead32(

-        register Display *dpy,

-        register long *data

-        register long size,

-	register char *packbuffer)

-{

- long *lpack,*lp;

- long mask32 = 0x00000000ffffffff;

- long maskw, nwords, i, bits;

-

-        _XReadPad (dpy, packbuffer, size);

-

-        lp = data;

-        lpack = (long *) packbuffer;

-        nwords = size >> 2;

-        bits = 32;

-

-        for(i=0;i<nwords;i++){

-            maskw = mask32 << bits;

-           *lp++ = ( *lpack & maskw ) >> bits;

-            bits = bits ^32;

-            if(bits){

-               lpack++;

-            }

-        }

-}

-

-void _XRead32(

-    Display *dpy,

-    long *data,

-    long len)

-{

-    char packbuffer[PACKBUFFERSIZE];

-    unsigned nunits = PACKBUFFERSIZE >> 2;

-

-    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {

-	_doXRead32 (dpy, data, PACKBUFFERSIZE, packbuffer);

-    }

-    if (len) _doXRead32 (dpy, data, len, packbuffer);

-}

-

-

-

-/*

- * _XRead16 - Read bytes from the socket unpacking each 16 bits

- *            into a long (64 bits on a CRAY computer).

- *

- */

-static _doXRead16(

-        register Display *dpy,

-        register short *data,

-        register long size,

-	char *packbuffer)

-{

-	long *lpack,*lp;

-	long mask16 = 0x000000000000ffff;

-	long maskw, nwords, i, bits;

-

-        (void) _XRead(dpy,packbuffer,size);	/* don't do a padded read... */

-

-        lp = (long *) data;

-        lpack = (long *) packbuffer;

-        nwords = size >> 1;  /* number of 16 bit words to be unpacked */

-        bits = 48;

-        for(i=0;i<nwords;i++){

-            maskw = mask16 << bits;

-           *lp++ = ( *lpack & maskw ) >> bits;

-            bits -= 16;

-            if(bits < 0){

-               lpack++;

-               bits = 48;

-            }

-        }

-}

-

-void _XRead16(

-    Display *dpy,

-    short *data,

-    long len)

-{

-    char packbuffer[PACKBUFFERSIZE];

-    unsigned nunits = PACKBUFFERSIZE >> 1;

-

-    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {

-	_doXRead16 (dpy, data, PACKBUFFERSIZE, packbuffer);

-    }

-    if (len) _doXRead16 (dpy, data, len, packbuffer);

-}

-

-void _XRead16Pad(

-    Display *dpy,

-    short *data,

-    long size)

-{

-    int slop = (size & 3);

-    short slopbuf[3];

-

-    _XRead16 (dpy, data, size);

-    if (slop > 0) {

-	_XRead16 (dpy, slopbuf, 4 - slop);

-    }

-}

-#endif /* WORD64 */

-

-/*

- * The hard part about this is that we only get 16 bits from a reply.

- * We have three values that will march along, with the following invariant:

- *	dpy->last_request_read <= rep->sequenceNumber <= dpy->request

- * We have to keep

- *	dpy->request - dpy->last_request_read < 2^16

- * or else we won't know for sure what value to use in events.  We do this

- * by forcing syncs when we get close.

- */

-

-unsigned long

-_XSetLastRequestRead(

-    register Display *dpy,

-    register xGenericReply *rep)

-{

-    register unsigned long	newseq, lastseq;

-

-    lastseq = dpy->last_request_read;

-    /*

-     * KeymapNotify has no sequence number, but is always guaranteed

-     * to immediately follow another event, except when generated via

-     * SendEvent (hmmm).

-     */

-    if ((rep->type & 0x7f) == KeymapNotify)

-	return(lastseq);

-

-    newseq = (lastseq & ~((unsigned long)0xffff)) | rep->sequenceNumber;

-

-    if (newseq < lastseq) {

-	newseq += 0x10000;

-	if (newseq > dpy->request) {

-	    (void) fprintf (stderr,

-	    "Xlib: sequence lost (0x%lx > 0x%lx) in reply type 0x%x!\n",

-			    newseq, dpy->request,

-			    (unsigned int) rep->type);

-	    newseq -= 0x10000;

-	}

-    }

-

-    dpy->last_request_read = newseq;

-    return(newseq);

-}

-

-/*

- * Support for internal connections, such as an IM might use.

- * By Stephen Gildea, X Consortium, September 1993

- */

-

-/* _XRegisterInternalConnection

- * Each IM (or Xlib extension) that opens a file descriptor that Xlib should

- * include in its select/poll mask must call this function to register the

- * fd with Xlib.  Any XConnectionWatchProc registered by XAddConnectionWatch

- * will also be called.

- *

- * Whenever Xlib detects input available on fd, it will call callback

- * with call_data to process it.  If non-Xlib code calls select/poll

- * and detects input available, it must call XProcessInternalConnection,

- * which will call the associated callback.

- *

- * Non-Xlib code can learn about these additional fds by calling

- * XInternalConnectionNumbers or, more typically, by registering

- * a XConnectionWatchProc with XAddConnectionWatch

- * to be called when fds are registered or unregistered.

- *

- * Returns True if registration succeeded, False if not, typically

- * because could not allocate memory.

- * Assumes Display locked when called.

- */

-Status

-_XRegisterInternalConnection(

-    Display* dpy,

-    int fd,

-    _XInternalConnectionProc callback,

-    XPointer call_data

-)

-{

-    struct _XConnectionInfo *new_conni, **iptr;

-    struct _XConnWatchInfo *watchers;

-    XPointer *wd;

-

-    new_conni = (struct _XConnectionInfo*)Xmalloc(sizeof(struct _XConnectionInfo));

-    if (!new_conni)

-	return 0;

-    new_conni->watch_data = (XPointer *)Xmalloc(dpy->watcher_count * sizeof(XPointer));

-    if (!new_conni->watch_data) {

-	Xfree(new_conni);

-	return 0;

-    }

-    new_conni->fd = fd;

-    new_conni->read_callback = callback;

-    new_conni->call_data = call_data;

-    new_conni->next = NULL;

-    /* link new structure onto end of list */

-    for (iptr = &dpy->im_fd_info; *iptr; iptr = &(*iptr)->next)

-	;

-    *iptr = new_conni;

-    dpy->im_fd_length++;

-    _XPollfdCacheAdd(dpy, fd);

-

-    for (watchers=dpy->conn_watchers, wd=new_conni->watch_data;

-	 watchers;

-	 watchers=watchers->next, wd++) {

-	*wd = NULL;		/* for cleanliness */

-	(*watchers->fn) (dpy, watchers->client_data, fd, True, wd);

-    }

-

-    return 1;

-}

-

-/* _XUnregisterInternalConnection

- * Each IM (or Xlib extension) that closes a file descriptor previously

- * registered with _XRegisterInternalConnection must call this function.

- * Any XConnectionWatchProc registered by XAddConnectionWatch

- * will also be called.

- *

- * Assumes Display locked when called.

- */

-void

-_XUnregisterInternalConnection(

-    Display* dpy,

-    int fd

-)

-{

-    struct _XConnectionInfo *info_list, **prev;

-    struct _XConnWatchInfo *watch;

-    XPointer *wd;

-

-    for (prev = &dpy->im_fd_info; (info_list = *prev);

-	 prev = &info_list->next) {

-	if (info_list->fd == fd) {

-	    *prev = info_list->next;

-	    dpy->im_fd_length--;

-	    for (watch=dpy->conn_watchers, wd=info_list->watch_data;

-		 watch;

-		 watch=watch->next, wd++) {

-		(*watch->fn) (dpy, watch->client_data, fd, False, wd);

-	    }

-	    if (info_list->watch_data)

-		Xfree (info_list->watch_data);

-	    Xfree (info_list);

-	    break;

-	}

-    }

-    _XPollfdCacheDel(dpy, fd);

-}

-

-/* XInternalConnectionNumbers

- * Returns an array of fds and an array of corresponding call data.

- * Typically a XConnectionWatchProc registered with XAddConnectionWatch

- * will be used instead of this function to discover

- * additional fds to include in the select/poll mask.

- *

- * The list is allocated with Xmalloc and should be freed by the caller

- * with Xfree;

- */

-Status

-XInternalConnectionNumbers(

-    Display *dpy,

-    int **fd_return,

-    int *count_return

-)

-{

-    int count;

-    struct _XConnectionInfo *info_list;

-    int *fd_list;

-

-    LockDisplay(dpy);

-    count = 0;

-    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next)

-	count++;

-    fd_list = (int*) Xmalloc (count * sizeof(int));

-    if (!fd_list) {

-	UnlockDisplay(dpy);

-	return 0;

-    }

-    count = 0;

-    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {

-	fd_list[count] = info_list->fd;

-	count++;

-    }

-    UnlockDisplay(dpy);

-

-    *fd_return = fd_list;

-    *count_return = count;

-    return 1;

-}

-

-void _XProcessInternalConnection(

-    Display *dpy,

-    struct _XConnectionInfo *conn_info)

-{

-    dpy->flags |= XlibDisplayProcConni;

-    UnlockDisplay(dpy);

-    (*conn_info->read_callback) (dpy, conn_info->fd, conn_info->call_data);

-    LockDisplay(dpy);

-    dpy->flags &= ~XlibDisplayProcConni;

-}

-

-/* XProcessInternalConnection

- * Call the _XInternalConnectionProc registered by _XRegisterInternalConnection

- * for this fd.

- * The Display is NOT locked during the call.

- */

-void

-XProcessInternalConnection(

-    Display* dpy,

-    int fd

-)

-{

-    struct _XConnectionInfo *info_list;

-

-    LockDisplay(dpy);

-    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {

-	if (info_list->fd == fd) {

-	    _XProcessInternalConnection(dpy, info_list);

-	    break;

-	}

-    }

-    UnlockDisplay(dpy);

-}

-

-/* XAddConnectionWatch

- * Register a callback to be called whenever _XRegisterInternalConnection

- * or _XUnregisterInternalConnection is called.

- * Callbacks are called with the Display locked.

- * If any connections are already registered, the callback is immediately

- * called for each of them.

- */

-Status

-XAddConnectionWatch(

-    Display* dpy,

-    XConnectionWatchProc callback,

-    XPointer client_data

-)

-{

-    struct _XConnWatchInfo *new_watcher, **wptr;

-    struct _XConnectionInfo *info_list;

-    XPointer *wd_array;

-

-    LockDisplay(dpy);

-

-    /* allocate new watch data */

-    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {

-	wd_array = (XPointer *)Xrealloc((char *)info_list->watch_data,

-					(dpy->watcher_count + 1) *

-					sizeof(XPointer));

-	if (!wd_array) {

-	    UnlockDisplay(dpy);

-	    return 0;

-	}

-	wd_array[dpy->watcher_count] = NULL;	/* for cleanliness */

-    }

-

-    new_watcher = (struct _XConnWatchInfo*)Xmalloc(sizeof(struct _XConnWatchInfo));

-    if (!new_watcher) {

-	UnlockDisplay(dpy);

-	return 0;

-    }

-    new_watcher->fn = callback;

-    new_watcher->client_data = client_data;

-    new_watcher->next = NULL;

-

-    /* link new structure onto end of list */

-    for (wptr = &dpy->conn_watchers; *wptr; wptr = &(*wptr)->next)

-	;

-    *wptr = new_watcher;

-    dpy->watcher_count++;

-

-    /* call new watcher on all currently registered fds */

-    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {

-	(*callback) (dpy, client_data, info_list->fd, True,

-		     info_list->watch_data + dpy->watcher_count - 1);

-    }

-

-    UnlockDisplay(dpy);

-    return 1;

-}

-

-/* XRemoveConnectionWatch

- * Unregister a callback registered by XAddConnectionWatch.

- * Both callback and client_data must match what was passed to

- * XAddConnectionWatch.

- */

-void

-XRemoveConnectionWatch(

-    Display* dpy,

-    XConnectionWatchProc callback,

-    XPointer client_data

-)

-{

-    struct _XConnWatchInfo *watch;

-    struct _XConnWatchInfo *previous = NULL;

-    struct _XConnectionInfo *conni;

-    int counter = 0;

-

-    LockDisplay(dpy);

-    for (watch=dpy->conn_watchers; watch; watch=watch->next) {

-	if (watch->fn == callback  &&  watch->client_data == client_data) {

-	    if (previous)

-		previous->next = watch->next;

-	    else

-		dpy->conn_watchers = watch->next;

-	    Xfree (watch);

-	    dpy->watcher_count--;

-	    /* remove our watch_data for each connection */

-	    for (conni=dpy->im_fd_info; conni; conni=conni->next) {

-		/* don't bother realloc'ing; these arrays are small anyway */

-		/* overlapping */

-		memmove(conni->watch_data+counter,

-			conni->watch_data+counter+1,

-			dpy->watcher_count - counter);

-	    }

-	    break;

-	}

-	previous = watch;

-	counter++;

-    }

-    UnlockDisplay(dpy);

-}

-

-/* end of internal connections support */

-

-/* Cookie jar implementation

-   dpy->cookiejar is a linked list. _XEnq receives the events but leaves

-   them in the normal EQ. _XStoreEvent returns the cookie event (minus

-   data pointer) and adds it to the cookiejar. _XDeq just removes

-   the entry like any other event but resets the data pointer for

-   cookie events (to avoid double-free, the memory is re-used by Xlib).

-

-   _XFetchEventCookie (called from XGetEventData) removes a cookie from the

-   jar. _XFreeEventCookies removes all unclaimed cookies from the jar

-   (called by XNextEvent).

-

-   _XFreeDisplayStructure calls _XFreeEventCookies for each cookie in the

-   normal EQ.

- */

-

-#include "utlist.h"

-struct stored_event {

-    XGenericEventCookie ev;

-    struct stored_event *prev;

-    struct stored_event *next;

-};

-

-Bool

-_XIsEventCookie(Display *dpy, XEvent *ev)

-{

-    return (ev->xcookie.type == GenericEvent &&

-	    dpy->generic_event_vec[ev->xcookie.extension & 0x7F] != NULL);

-}

-

-/**

- * Free all events in the event list.

- */

-void

-_XFreeEventCookies(Display *dpy)

-{

-    struct stored_event **head, *e, *tmp;

-

-    if (!dpy->cookiejar)

-        return;

-

-    head = (struct stored_event**)&dpy->cookiejar;

-

-    DL_FOREACH_SAFE(*head, e, tmp) {

-        XFree(e->ev.data);

-        XFree(e);

-        if (dpy->cookiejar == e)

-            dpy->cookiejar = NULL;

-    }

-}

-

-/**

- * Add an event to the display's event list. This event must be freed on the

- * next call to XNextEvent().

- */

-void

-_XStoreEventCookie(Display *dpy, XEvent *event)

-{

-    XGenericEventCookie* cookie = &event->xcookie;

-    struct stored_event **head, *add;

-

-    if (!_XIsEventCookie(dpy, event))

-        return;

-

-    head = (struct stored_event**)(&dpy->cookiejar);

-

-    add = Xmalloc(sizeof(struct stored_event));

-    if (!add) {

-        ESET(ENOMEM);

-        _XIOError(dpy);

-    }

-    add->ev = *cookie;

-    DL_APPEND(*head, add);

-    cookie->data = NULL; /* don't return data yet, must be claimed */

-}

-

-/**

- * Return the event with the given cookie and remove it from the list.

- */

-Bool

-_XFetchEventCookie(Display *dpy, XGenericEventCookie* ev)

-{

-    Bool ret = False;

-    struct stored_event **head, *event;

-    head = (struct stored_event**)&dpy->cookiejar;

-

-    if (!_XIsEventCookie(dpy, (XEvent*)ev))

-        return ret;

-

-    DL_FOREACH(*head, event) {

-        if (event->ev.cookie == ev->cookie &&

-            event->ev.extension == ev->extension &&

-            event->ev.evtype == ev->evtype) {

-            *ev = event->ev;

-            DL_DELETE(*head, event);

-            Xfree(event);

-            ret = True;

-            break;

-        }

-    }

-

-    return ret;

-}

-

-Bool

-_XCopyEventCookie(Display *dpy, XGenericEventCookie *in, XGenericEventCookie *out)

-{

-    Bool ret = False;

-    int extension;

-

-    if (!_XIsEventCookie(dpy, (XEvent*)in) || !out)

-        return ret;

-

-    extension = in->extension & 0x7F;

-

-    if (!dpy->generic_event_copy_vec[extension])

-        return ret;

-

-    ret = ((*dpy->generic_event_copy_vec[extension])(dpy, in, out));

-    out->cookie = ret ? ++dpy->next_cookie  : 0;

-    return ret;

-}

-

-

-/*

- * _XEnq - Place event packets on the display's queue.

- * note that no squishing of move events in V11, since there

- * is pointer motion hints....

- */

-void _XEnq(

-	register Display *dpy,

-	register xEvent *event)

-{

-	register _XQEvent *qelt;

-	int type, extension;

-

-	if ((qelt = dpy->qfree)) {

-		/* If dpy->qfree is non-NULL do this, else malloc a new one. */

-		dpy->qfree = qelt->next;

-	}

-	else if ((qelt =

-	    (_XQEvent *) Xmalloc((unsigned)sizeof(_XQEvent))) == NULL) {

-		/* Malloc call failed! */

-		ESET(ENOMEM);

-		_XIOError(dpy);

-	}

-	qelt->next = NULL;

-

-	type = event->u.u.type & 0177;

-	extension = ((xGenericEvent*)event)->extension;

-

-	qelt->event.type = type;

-	/* If an extension has registerd a generic_event_vec handler, then

-	 * it can handle event cookies. Otherwise, proceed with the normal

-	 * event handlers.

-	 *

-	 * If the generic_event_vec is called, qelt->event is a event cookie

-	 * with the data pointer and the "free" pointer set. Data pointer is

-	 * some memory allocated by the extension.

-	 */

-        if (type == GenericEvent && dpy->generic_event_vec[extension & 0x7F]) {

-	    XGenericEventCookie *cookie = &qelt->event.xcookie;

-	    (*dpy->generic_event_vec[extension & 0x7F])(dpy, cookie, event);

-	    cookie->cookie = ++dpy->next_cookie;

-

-	    qelt->qserial_num = dpy->next_event_serial_num++;

-	    if (dpy->tail)	dpy->tail->next = qelt;

-	    else		dpy->head = qelt;

-

-	    dpy->tail = qelt;

-	    dpy->qlen++;

-	} else if ((*dpy->event_vec[type])(dpy, &qelt->event, event)) {

-	    qelt->qserial_num = dpy->next_event_serial_num++;

-	    if (dpy->tail)	dpy->tail->next = qelt;

-	    else 		dpy->head = qelt;

-

-	    dpy->tail = qelt;

-	    dpy->qlen++;

-	} else {

-	    /* ignored, or stashed away for many-to-one compression */

-	    qelt->next = dpy->qfree;

-	    dpy->qfree = qelt;

-	}

-}

-

-/*

- * _XDeq - Remove event packet from the display's queue.

- */

-void _XDeq(

-    register Display *dpy,

-    register _XQEvent *prev,	/* element before qelt */

-    register _XQEvent *qelt)	/* element to be unlinked */

-{

-    if (prev) {

-	if ((prev->next = qelt->next) == NULL)

-	    dpy->tail = prev;

-    } else {

-	/* no prev, so removing first elt */

-	if ((dpy->head = qelt->next) == NULL)

-	    dpy->tail = NULL;

-    }

-    qelt->qserial_num = 0;

-    qelt->next = dpy->qfree;

-    dpy->qfree = qelt;

-    dpy->qlen--;

-

-    if (_XIsEventCookie(dpy, &qelt->event)) {

-	XGenericEventCookie* cookie = &qelt->event.xcookie;

-	/* dpy->qfree is re-used, reset memory to avoid double free on

-	 * _XFreeDisplayStructure */

-	cookie->data = NULL;

-    }

-}

-

-/*

- * EventToWire in separate file in that often not needed.

- */

-

-/*ARGSUSED*/

-Bool

-_XUnknownWireEvent(

-    register Display *dpy,	/* pointer to display structure */

-    register XEvent *re,	/* pointer to where event should be reformatted */

-    register xEvent *event)	/* wire protocol event */

-{

-#ifdef notdef

-	(void) fprintf(stderr,

-	    "Xlib: unhandled wire event! event number = %d, display = %x\n.",

-			event->u.u.type, dpy);

-#endif

-	return(False);

-}

-

-Bool

-_XUnknownWireEventCookie(

-    Display *dpy,	/* pointer to display structure */

-    XGenericEventCookie *re,	/* pointer to where event should be reformatted */

-    xEvent *event)	/* wire protocol event */

-{

-#ifdef notdef

-	fprintf(stderr,

-	    "Xlib: unhandled wire cookie event! extension number = %d, display = %x\n.",

-			((xGenericEvent*)event)->extension, dpy);

-#endif

-	return(False);

-}

-

-Bool

-_XUnknownCopyEventCookie(

-    Display *dpy,	/* pointer to display structure */

-    XGenericEventCookie *in,	/* source */

-    XGenericEventCookie *out)	/* destination */

-{

-#ifdef notdef

-	fprintf(stderr,

-	    "Xlib: unhandled cookie event copy! extension number = %d, display = %x\n.",

-			in->extension, dpy);

-#endif

-	return(False);

-}

-

-/*ARGSUSED*/

-Status

-_XUnknownNativeEvent(

-    register Display *dpy,	/* pointer to display structure */

-    register XEvent *re,	/* pointer to where event should be reformatted */

-    register xEvent *event)	/* wire protocol event */

-{

-#ifdef notdef

-	(void) fprintf(stderr,

- 	   "Xlib: unhandled native event! event number = %d, display = %x\n.",

-			re->type, dpy);

-#endif

-	return(0);

-}

-/*

- * reformat a wire event into an XEvent structure of the right type.

- */

-Bool

-_XWireToEvent(

-    register Display *dpy,	/* pointer to display structure */

-    register XEvent *re,	/* pointer to where event should be reformatted */

-    register xEvent *event)	/* wire protocol event */

-{

-

-	re->type = event->u.u.type & 0x7f;

-	((XAnyEvent *)re)->serial = _XSetLastRequestRead(dpy,

-					(xGenericReply *)event);

-	((XAnyEvent *)re)->send_event = ((event->u.u.type & 0x80) != 0);

-	((XAnyEvent *)re)->display = dpy;

-

-	/* Ignore the leading bit of the event type since it is set when a

-		client sends an event rather than the server. */

-

-	switch (event-> u.u.type & 0177) {

-	      case KeyPress:

-	      case KeyRelease:

-	        {

-			register XKeyEvent *ev = (XKeyEvent*) re;

-			ev->root 	= event->u.keyButtonPointer.root;

-			ev->window 	= event->u.keyButtonPointer.event;

-			ev->subwindow 	= event->u.keyButtonPointer.child;

-			ev->time 	= event->u.keyButtonPointer.time;

-			ev->x 		= cvtINT16toInt(event->u.keyButtonPointer.eventX);

-			ev->y 		= cvtINT16toInt(event->u.keyButtonPointer.eventY);

-			ev->x_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootX);

-			ev->y_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootY);

-			ev->state	= event->u.keyButtonPointer.state;

-			ev->same_screen	= event->u.keyButtonPointer.sameScreen;

-			ev->keycode 	= event->u.u.detail;

-		}

-	      	break;

-	      case ButtonPress:

-	      case ButtonRelease:

-	        {

-			register XButtonEvent *ev =  (XButtonEvent *) re;

-			ev->root 	= event->u.keyButtonPointer.root;

-			ev->window 	= event->u.keyButtonPointer.event;

-			ev->subwindow 	= event->u.keyButtonPointer.child;

-			ev->time 	= event->u.keyButtonPointer.time;

-			ev->x 		= cvtINT16toInt(event->u.keyButtonPointer.eventX);

-			ev->y 		= cvtINT16toInt(event->u.keyButtonPointer.eventY);

-			ev->x_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootX);

-			ev->y_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootY);

-			ev->state	= event->u.keyButtonPointer.state;

-			ev->same_screen	= event->u.keyButtonPointer.sameScreen;

-			ev->button 	= event->u.u.detail;

-		}

-	        break;

-	      case MotionNotify:

-	        {

-			register XMotionEvent *ev =   (XMotionEvent *)re;

-			ev->root 	= event->u.keyButtonPointer.root;

-			ev->window 	= event->u.keyButtonPointer.event;

-			ev->subwindow 	= event->u.keyButtonPointer.child;

-			ev->time 	= event->u.keyButtonPointer.time;

-			ev->x 		= cvtINT16toInt(event->u.keyButtonPointer.eventX);

-			ev->y 		= cvtINT16toInt(event->u.keyButtonPointer.eventY);

-			ev->x_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootX);

-			ev->y_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootY);

-			ev->state	= event->u.keyButtonPointer.state;

-			ev->same_screen	= event->u.keyButtonPointer.sameScreen;

-			ev->is_hint 	= event->u.u.detail;

-		}

-	        break;

-	      case EnterNotify:

-	      case LeaveNotify:

-		{

-			register XCrossingEvent *ev   = (XCrossingEvent *) re;

-			ev->root	= event->u.enterLeave.root;

-			ev->window	= event->u.enterLeave.event;

-			ev->subwindow	= event->u.enterLeave.child;

-			ev->time	= event->u.enterLeave.time;

-			ev->x		= cvtINT16toInt(event->u.enterLeave.eventX);

-			ev->y		= cvtINT16toInt(event->u.enterLeave.eventY);

-			ev->x_root	= cvtINT16toInt(event->u.enterLeave.rootX);

-			ev->y_root	= cvtINT16toInt(event->u.enterLeave.rootY);

-			ev->state	= event->u.enterLeave.state;

-			ev->mode	= event->u.enterLeave.mode;

-			ev->same_screen = (event->u.enterLeave.flags &

-				ELFlagSameScreen) && True;

-			ev->focus	= (event->u.enterLeave.flags &

-			  	ELFlagFocus) && True;

-			ev->detail	= event->u.u.detail;

-		}

-		  break;

-	      case FocusIn:

-	      case FocusOut:

-		{

-			register XFocusChangeEvent *ev = (XFocusChangeEvent *) re;

-			ev->window 	= event->u.focus.window;

-			ev->mode	= event->u.focus.mode;

-			ev->detail	= event->u.u.detail;

-		}

-		  break;

-	      case KeymapNotify:

-		{

-			register XKeymapEvent *ev = (XKeymapEvent *) re;

-			ev->window	= None;

-			memcpy(&ev->key_vector[1],

-			       (char *)((xKeymapEvent *) event)->map,

-			       sizeof (((xKeymapEvent *) event)->map));

-		}

-		break;

-	      case Expose:

-		{

-			register XExposeEvent *ev = (XExposeEvent *) re;

-			ev->window	= event->u.expose.window;

-			ev->x		= event->u.expose.x;

-			ev->y		= event->u.expose.y;

-			ev->width	= event->u.expose.width;

-			ev->height	= event->u.expose.height;

-			ev->count	= event->u.expose.count;

-		}

-		break;

-	      case GraphicsExpose:

-		{

-		    register XGraphicsExposeEvent *ev =

-			(XGraphicsExposeEvent *) re;

-		    ev->drawable	= event->u.graphicsExposure.drawable;

-		    ev->x		= event->u.graphicsExposure.x;

-		    ev->y		= event->u.graphicsExposure.y;

-		    ev->width		= event->u.graphicsExposure.width;

-		    ev->height		= event->u.graphicsExposure.height;

-		    ev->count		= event->u.graphicsExposure.count;

-		    ev->major_code	= event->u.graphicsExposure.majorEvent;

-		    ev->minor_code	= event->u.graphicsExposure.minorEvent;

-		}

-		break;

-	      case NoExpose:

-		{

-		    register XNoExposeEvent *ev = (XNoExposeEvent *) re;

-		    ev->drawable	= event->u.noExposure.drawable;

-		    ev->major_code	= event->u.noExposure.majorEvent;

-		    ev->minor_code	= event->u.noExposure.minorEvent;

-		}

-		break;

-	      case VisibilityNotify:

-		{

-		    register XVisibilityEvent *ev = (XVisibilityEvent *) re;

-		    ev->window		= event->u.visibility.window;

-		    ev->state		= event->u.visibility.state;

-		}

-		break;

-	      case CreateNotify:

-		{

-		    register XCreateWindowEvent *ev =

-			 (XCreateWindowEvent *) re;

-		    ev->window		= event->u.createNotify.window;

-		    ev->parent		= event->u.createNotify.parent;

-		    ev->x		= cvtINT16toInt(event->u.createNotify.x);

-		    ev->y		= cvtINT16toInt(event->u.createNotify.y);

-		    ev->width		= event->u.createNotify.width;

-		    ev->height		= event->u.createNotify.height;

-		    ev->border_width	= event->u.createNotify.borderWidth;

-		    ev->override_redirect	= event->u.createNotify.override;

-		}

-		break;

-	      case DestroyNotify:

-		{

-		    register XDestroyWindowEvent *ev =

-				(XDestroyWindowEvent *) re;

-		    ev->window		= event->u.destroyNotify.window;

-		    ev->event		= event->u.destroyNotify.event;

-		}

-		break;

-	      case UnmapNotify:

-		{

-		    register XUnmapEvent *ev = (XUnmapEvent *) re;

-		    ev->window		= event->u.unmapNotify.window;

-		    ev->event		= event->u.unmapNotify.event;

-		    ev->from_configure	= event->u.unmapNotify.fromConfigure;

-		}

-		break;

-	      case MapNotify:

-		{

-		    register XMapEvent *ev = (XMapEvent *) re;

-		    ev->window		= event->u.mapNotify.window;

-		    ev->event		= event->u.mapNotify.event;

-		    ev->override_redirect	= event->u.mapNotify.override;

-		}

-		break;

-	      case MapRequest:

-		{

-		    register XMapRequestEvent *ev = (XMapRequestEvent *) re;

-		    ev->window		= event->u.mapRequest.window;

-		    ev->parent		= event->u.mapRequest.parent;

-		}

-		break;

-	      case ReparentNotify:

-		{

-		    register XReparentEvent *ev = (XReparentEvent *) re;

-		    ev->event		= event->u.reparent.event;

-		    ev->window		= event->u.reparent.window;

-		    ev->parent		= event->u.reparent.parent;

-		    ev->x		= cvtINT16toInt(event->u.reparent.x);

-		    ev->y		= cvtINT16toInt(event->u.reparent.y);

-		    ev->override_redirect	= event->u.reparent.override;

-		}

-		break;

-	      case ConfigureNotify:

-		{

-		    register XConfigureEvent *ev = (XConfigureEvent *) re;

-		    ev->event	= event->u.configureNotify.event;

-		    ev->window	= event->u.configureNotify.window;

-		    ev->above	= event->u.configureNotify.aboveSibling;

-		    ev->x	= cvtINT16toInt(event->u.configureNotify.x);

-		    ev->y	= cvtINT16toInt(event->u.configureNotify.y);

-		    ev->width	= event->u.configureNotify.width;

-		    ev->height	= event->u.configureNotify.height;

-		    ev->border_width  = event->u.configureNotify.borderWidth;

-		    ev->override_redirect = event->u.configureNotify.override;

-		}

-		break;

-	      case ConfigureRequest:

-		{

-		    register XConfigureRequestEvent *ev =

-		        (XConfigureRequestEvent *) re;

-		    ev->window		= event->u.configureRequest.window;

-		    ev->parent		= event->u.configureRequest.parent;

-		    ev->above		= event->u.configureRequest.sibling;

-		    ev->x		= cvtINT16toInt(event->u.configureRequest.x);

-		    ev->y		= cvtINT16toInt(event->u.configureRequest.y);

-		    ev->width		= event->u.configureRequest.width;

-		    ev->height		= event->u.configureRequest.height;

-		    ev->border_width	= event->u.configureRequest.borderWidth;

-		    ev->value_mask	= event->u.configureRequest.valueMask;

-		    ev->detail  	= event->u.u.detail;

-		}

-		break;

-	      case GravityNotify:

-		{

-		    register XGravityEvent *ev = (XGravityEvent *) re;

-		    ev->window		= event->u.gravity.window;

-		    ev->event		= event->u.gravity.event;

-		    ev->x		= cvtINT16toInt(event->u.gravity.x);

-		    ev->y		= cvtINT16toInt(event->u.gravity.y);

-		}

-		break;

-	      case ResizeRequest:

-		{

-		    register XResizeRequestEvent *ev =

-			(XResizeRequestEvent *) re;

-		    ev->window		= event->u.resizeRequest.window;

-		    ev->width		= event->u.resizeRequest.width;

-		    ev->height		= event->u.resizeRequest.height;

-		}

-		break;

-	      case CirculateNotify:

-		{

-		    register XCirculateEvent *ev = (XCirculateEvent *) re;

-		    ev->window		= event->u.circulate.window;

-		    ev->event		= event->u.circulate.event;

-		    ev->place		= event->u.circulate.place;

-		}

-		break;

-	      case CirculateRequest:

-		{

-		    register XCirculateRequestEvent *ev =

-		        (XCirculateRequestEvent *) re;

-		    ev->window		= event->u.circulate.window;

-		    ev->parent		= event->u.circulate.event;

-		    ev->place		= event->u.circulate.place;

-		}

-		break;

-	      case PropertyNotify:

-		{

-		    register XPropertyEvent *ev = (XPropertyEvent *) re;

-		    ev->window		= event->u.property.window;

-		    ev->atom		= event->u.property.atom;

-		    ev->time		= event->u.property.time;

-		    ev->state		= event->u.property.state;

-		}

-		break;

-	      case SelectionClear:

-		{

-		    register XSelectionClearEvent *ev =

-			 (XSelectionClearEvent *) re;

-		    ev->window		= event->u.selectionClear.window;

-		    ev->selection	= event->u.selectionClear.atom;

-		    ev->time		= event->u.selectionClear.time;

-		}

-		break;

-	      case SelectionRequest:

-		{

-		    register XSelectionRequestEvent *ev =

-		        (XSelectionRequestEvent *) re;

-		    ev->owner		= event->u.selectionRequest.owner;

-		    ev->requestor	= event->u.selectionRequest.requestor;

-		    ev->selection	= event->u.selectionRequest.selection;

-		    ev->target		= event->u.selectionRequest.target;

-		    ev->property	= event->u.selectionRequest.property;

-		    ev->time		= event->u.selectionRequest.time;

-		}

-		break;

-	      case SelectionNotify:

-		{

-		    register XSelectionEvent *ev = (XSelectionEvent *) re;

-		    ev->requestor	= event->u.selectionNotify.requestor;

-		    ev->selection	= event->u.selectionNotify.selection;

-		    ev->target		= event->u.selectionNotify.target;

-		    ev->property	= event->u.selectionNotify.property;

-		    ev->time		= event->u.selectionNotify.time;

-		}

-		break;

-	      case ColormapNotify:

-		{

-		    register XColormapEvent *ev = (XColormapEvent *) re;

-		    ev->window		= event->u.colormap.window;

-		    ev->colormap	= event->u.colormap.colormap;

-		    ev->new		= event->u.colormap.new;

-		    ev->state		= event->u.colormap.state;

-	        }

-		break;

-	      case ClientMessage:

-		{

-		   register int i;

-		   register XClientMessageEvent *ev

-		   			= (XClientMessageEvent *) re;

-		   ev->window		= event->u.clientMessage.window;

-		   ev->format		= event->u.u.detail;

-		   switch (ev->format) {

-			case 8:

-			   ev->message_type = event->u.clientMessage.u.b.type;

-			   for (i = 0; i < 20; i++)

-			     ev->data.b[i] = event->u.clientMessage.u.b.bytes[i];

-			   break;

-			case 16:

-			   ev->message_type = event->u.clientMessage.u.s.type;

-			   ev->data.s[0] = cvtINT16toShort(event->u.clientMessage.u.s.shorts0);

-			   ev->data.s[1] = cvtINT16toShort(event->u.clientMessage.u.s.shorts1);

-			   ev->data.s[2] = cvtINT16toShort(event->u.clientMessage.u.s.shorts2);

-			   ev->data.s[3] = cvtINT16toShort(event->u.clientMessage.u.s.shorts3);

-			   ev->data.s[4] = cvtINT16toShort(event->u.clientMessage.u.s.shorts4);

-			   ev->data.s[5] = cvtINT16toShort(event->u.clientMessage.u.s.shorts5);

-			   ev->data.s[6] = cvtINT16toShort(event->u.clientMessage.u.s.shorts6);

-			   ev->data.s[7] = cvtINT16toShort(event->u.clientMessage.u.s.shorts7);

-			   ev->data.s[8] = cvtINT16toShort(event->u.clientMessage.u.s.shorts8);

-			   ev->data.s[9] = cvtINT16toShort(event->u.clientMessage.u.s.shorts9);

-			   break;

-			case 32:

-			   ev->message_type = event->u.clientMessage.u.l.type;

-			   ev->data.l[0] = cvtINT32toLong(event->u.clientMessage.u.l.longs0);

-			   ev->data.l[1] = cvtINT32toLong(event->u.clientMessage.u.l.longs1);

-			   ev->data.l[2] = cvtINT32toLong(event->u.clientMessage.u.l.longs2);

-			   ev->data.l[3] = cvtINT32toLong(event->u.clientMessage.u.l.longs3);

-			   ev->data.l[4] = cvtINT32toLong(event->u.clientMessage.u.l.longs4);

-			   break;

-			default: /* XXX should never occur */

-				break;

-		    }

-	        }

-		break;

-	      case MappingNotify:

-		{

-		   register XMappingEvent *ev = (XMappingEvent *)re;

-		   ev->window		= 0;

-		   ev->first_keycode 	= event->u.mappingNotify.firstKeyCode;

-		   ev->request 		= event->u.mappingNotify.request;

-		   ev->count 		= event->u.mappingNotify.count;

-		}

-		break;

-	      default:

-		return(_XUnknownWireEvent(dpy, re, event));

-	}

-	return(True);

-}

-

-

-/*

- * _XDefaultIOError - Default fatal system error reporting routine.  Called

- * when an X internal system error is encountered.

- */

-int _XDefaultIOError(

-	Display *dpy)

-{

-	if (ECHECK(EPIPE)) {

-	    (void) fprintf (stderr,

-	"X connection to %s broken (explicit kill or server shutdown).\r\n",

-			    DisplayString (dpy));

-	} else {

-	    (void) fprintf (stderr,

-			"XIO:  fatal IO error %d (%s) on X server \"%s\"\r\n",

-#ifdef WIN32

-			WSAGetLastError(), strerror(WSAGetLastError()),

-#else

-			errno, strerror (errno),

-#endif

-			DisplayString (dpy));

-	    (void) fprintf (stderr,

-	 "      after %lu requests (%lu known processed) with %d events remaining.\r\n",

-			NextRequest(dpy) - 1, LastKnownRequestProcessed(dpy),

-			QLength(dpy));

-

-	}

-	exit(1);

-        return(0); /* dummy - function should never return */

-}

-

-

-static int _XPrintDefaultError(

-    Display *dpy,

-    XErrorEvent *event,

-    FILE *fp)

-{

-    char buffer[BUFSIZ];

-    char mesg[BUFSIZ];

-    char number[32];

-    const char *mtype = "XlibMessage";

-    register _XExtension *ext = (_XExtension *)NULL;

-    _XExtension *bext = (_XExtension *)NULL;

-    XGetErrorText(dpy, event->error_code, buffer, BUFSIZ);

-    XGetErrorDatabaseText(dpy, mtype, "XError", "X Error", mesg, BUFSIZ);

-    (void) fprintf(fp, "%s:  %s\n  ", mesg, buffer);

-    XGetErrorDatabaseText(dpy, mtype, "MajorCode", "Request Major code %d",

-	mesg, BUFSIZ);

-    (void) fprintf(fp, mesg, event->request_code);

-    if (event->request_code < 128) {

-	sprintf(number, "%d", event->request_code);

-	XGetErrorDatabaseText(dpy, "XRequest", number, "", buffer, BUFSIZ);

-    } else {

-	for (ext = dpy->ext_procs;

-	     ext && (ext->codes.major_opcode != event->request_code);

-	     ext = ext->next)

-	  ;

-	if (ext)

-	    strcpy(buffer, ext->name);

-	else

-	    buffer[0] = '\0';

-    }

-    (void) fprintf(fp, " (%s)\n", buffer);

-    if (event->request_code >= 128) {

-	XGetErrorDatabaseText(dpy, mtype, "MinorCode", "Request Minor code %d",

-			      mesg, BUFSIZ);

-	fputs("  ", fp);

-	(void) fprintf(fp, mesg, event->minor_code);

-	if (ext) {

-	    sprintf(mesg, "%s.%d", ext->name, event->minor_code);

-	    XGetErrorDatabaseText(dpy, "XRequest", mesg, "", buffer, BUFSIZ);

-	    (void) fprintf(fp, " (%s)", buffer);

-	}

-	fputs("\n", fp);

-    }

-    if (event->error_code >= 128) {

-	/* kludge, try to find the extension that caused it */

-	buffer[0] = '\0';

-	for (ext = dpy->ext_procs; ext; ext = ext->next) {

-	    if (ext->error_string)

-		(*ext->error_string)(dpy, event->error_code, &ext->codes,

-				     buffer, BUFSIZ);

-	    if (buffer[0]) {

-		bext = ext;

-		break;

-	    }

-	    if (ext->codes.first_error &&

-		ext->codes.first_error < (int)event->error_code &&

-		(!bext || ext->codes.first_error > bext->codes.first_error))

-		bext = ext;

-	}

-	if (bext)

-	    sprintf(buffer, "%s.%d", bext->name,

-		    event->error_code - bext->codes.first_error);

-	else

-	    strcpy(buffer, "Value");

-	XGetErrorDatabaseText(dpy, mtype, buffer, "", mesg, BUFSIZ);

-	if (mesg[0]) {

-	    fputs("  ", fp);

-	    (void) fprintf(fp, mesg, event->resourceid);

-	    fputs("\n", fp);

-	}

-	/* let extensions try to print the values */

-	for (ext = dpy->ext_procs; ext; ext = ext->next) {

-	    if (ext->error_values)

-		(*ext->error_values)(dpy, event, fp);

-	}

-    } else if ((event->error_code == BadWindow) ||

-	       (event->error_code == BadPixmap) ||

-	       (event->error_code == BadCursor) ||

-	       (event->error_code == BadFont) ||

-	       (event->error_code == BadDrawable) ||

-	       (event->error_code == BadColor) ||

-	       (event->error_code == BadGC) ||

-	       (event->error_code == BadIDChoice) ||

-	       (event->error_code == BadValue) ||

-	       (event->error_code == BadAtom)) {

-	if (event->error_code == BadValue)

-	    XGetErrorDatabaseText(dpy, mtype, "Value", "Value 0x%x",

-				  mesg, BUFSIZ);

-	else if (event->error_code == BadAtom)

-	    XGetErrorDatabaseText(dpy, mtype, "AtomID", "AtomID 0x%x",

-				  mesg, BUFSIZ);

-	else

-	    XGetErrorDatabaseText(dpy, mtype, "ResourceID", "ResourceID 0x%x",

-				  mesg, BUFSIZ);

-	fputs("  ", fp);

-	(void) fprintf(fp, mesg, event->resourceid);

-	fputs("\n", fp);

-    }

-    XGetErrorDatabaseText(dpy, mtype, "ErrorSerial", "Error Serial #%d",

-			  mesg, BUFSIZ);

-    fputs("  ", fp);

-    (void) fprintf(fp, mesg, event->serial);

-    XGetErrorDatabaseText(dpy, mtype, "CurrentSerial", "Current Serial #%d",

-			  mesg, BUFSIZ);

-    fputs("\n  ", fp);

-    (void) fprintf(fp, mesg, dpy->request);

-    fputs("\n", fp);

-    if (event->error_code == BadImplementation) return 0;

-    return 1;

-}

-

-int _XDefaultError(

-	Display *dpy,

-	XErrorEvent *event)

-{

-    if (_XPrintDefaultError (dpy, event, stderr) == 0) return 0;

-    exit(1);

-    /*NOTREACHED*/

-}

-

-/*ARGSUSED*/

-Bool _XDefaultWireError(Display *display, XErrorEvent *he, xError *we)

-{

-    return True;

-}

-

-/*

- * _XError - upcall internal or user protocol error handler

- */

-int _XError (

-    Display *dpy,

-    register xError *rep)

-{

-    /*

-     * X_Error packet encountered!  We need to unpack the error before

-     * giving it to the user.

-     */

-    XEvent event; /* make it a large event */

-    register _XAsyncHandler *async, *next;

-

-    event.xerror.serial = _XSetLastRequestRead(dpy, (xGenericReply *)rep);

-

-    for (async = dpy->async_handlers; async; async = next) {

-	next = async->next;

-	if ((*async->handler)(dpy, (xReply *)rep,

-			      (char *)rep, SIZEOF(xError), async->data))

-	    return 0;

-    }

-

-    event.xerror.display = dpy;

-    event.xerror.type = X_Error;

-    event.xerror.resourceid = rep->resourceID;

-    event.xerror.error_code = rep->errorCode;

-    event.xerror.request_code = rep->majorCode;

-    event.xerror.minor_code = rep->minorCode;

-    if (dpy->error_vec &&

-	!(*dpy->error_vec[rep->errorCode])(dpy, &event.xerror, rep))

-	return 0;

-    if (_XErrorFunction != NULL) {

-	return (*_XErrorFunction)(dpy, (XErrorEvent *)&event); /* upcall */

-    } else {

-	return _XDefaultError(dpy, (XErrorEvent *)&event);

-    }

-}

-

-/*

- * _XIOError - call user connection error handler and exit

- */

-int

-_XIOError (

-    Display *dpy)

-{

-    dpy->flags |= XlibDisplayIOError;

-#ifdef WIN32

-    errno = WSAGetLastError();

-#endif

-

-    /* This assumes that the thread calling exit will call any atexit handlers.

-     * If this does not hold, then an alternate solution would involve

-     * registering an atexit handler to take over the lock, which would only

-     * assume that the same thread calls all the atexit handlers. */

-#ifdef XTHREADS

-    if (dpy->lock)

-	(*dpy->lock->user_lock_display)(dpy);

-#endif

-    UnlockDisplay(dpy);

-

-    if (_XIOErrorFunction != NULL)

-	(*_XIOErrorFunction)(dpy);

-    else

-	_XDefaultIOError(dpy);

-    exit (1);

-    return 0;

-}

-

-

-/*

- * This routine can be used to (cheaply) get some memory within a single

- * Xlib routine for scratch space.  A single buffer is reused each time

- * if possible.  To be MT safe, you can only call this between a call to

- * GetReq* and a call to Data* or _XSend*, or in a context when the thread

- * is guaranteed to not unlock the display.

- */

-char *_XAllocScratch(

-	register Display *dpy,

-	unsigned long nbytes)

-{

-	if (nbytes > dpy->scratch_length) {

-	    if (dpy->scratch_buffer) Xfree (dpy->scratch_buffer);

-	    if ((dpy->scratch_buffer = Xmalloc((unsigned) nbytes)))

-		dpy->scratch_length = nbytes;

-	    else dpy->scratch_length = 0;

-	}

-	return (dpy->scratch_buffer);

-}

-

-/*

- * Scratch space allocator you can call any time, multiple times, and be

- * MT safe, but you must hand the buffer back with _XFreeTemp.

- */

-char *_XAllocTemp(

-    register Display *dpy,

-    unsigned long nbytes)

-{

-    char *buf;

-

-    buf = _XAllocScratch(dpy, nbytes);

-    dpy->scratch_buffer = NULL;

-    dpy->scratch_length = 0;

-    return buf;

-}

-

-void _XFreeTemp(

-    register Display *dpy,

-    char *buf,

-    unsigned long nbytes)

-{

-    if (dpy->scratch_buffer)

-	Xfree(dpy->scratch_buffer);

-    dpy->scratch_buffer = buf;

-    dpy->scratch_length = nbytes;

-}

-

-/*

- * Given a visual id, find the visual structure for this id on this display.

- */

-Visual *_XVIDtoVisual(

-	Display *dpy,

-	VisualID id)

-{

-	register int i, j, k;

-	register Screen *sp;

-	register Depth *dp;

-	register Visual *vp;

-	for (i = 0; i < dpy->nscreens; i++) {

-		sp = &dpy->screens[i];

-		for (j = 0; j < sp->ndepths; j++) {

-			dp = &sp->depths[j];

-			/* if nvisuals == 0 then visuals will be NULL */

-			for (k = 0; k < dp->nvisuals; k++) {

-				vp = &dp->visuals[k];

-				if (vp->visualid == id) return (vp);

-			}

-		}

-	}

-	return (NULL);

-}

-

-int

-XFree (void *data)

-{

-	Xfree (data);

-	return 1;

-}

-

-#ifdef _XNEEDBCOPYFUNC

-void _Xbcopy(b1, b2, length)

-    register char *b1, *b2;

-    register length;

-{

-    if (b1 < b2) {

-	b2 += length;

-	b1 += length;

-	while (length--)

-	    *--b2 = *--b1;

-    } else {

-	while (length--)

-	    *b2++ = *b1++;

-    }

-}

-#endif

-

-#ifdef DataRoutineIsProcedure

-void Data(

-	Display *dpy,

-	char *data,

-	long len)

-{

-	if (dpy->bufptr + (len) <= dpy->bufmax) {

-		memcpy(dpy->bufptr, data, (int)len);

-		dpy->bufptr += ((len) + 3) & ~3;

-	} else {

-		_XSend(dpy, data, len);

-	}

-}

-#endif /* DataRoutineIsProcedure */

-

-

-#ifdef LONG64

-int

-_XData32(

-    Display *dpy,

-    register long *data,

-    unsigned len)

-{

-    register int *buf;

-    register long i;

-

-    while (len) {

-	buf = (int *)dpy->bufptr;

-	i = dpy->bufmax - (char *)buf;

-	if (!i) {

-	    _XFlush(dpy);

-	    continue;

-	}

-	if (len < i)

-	    i = len;

-	dpy->bufptr = (char *)buf + i;

-	len -= i;

-	i >>= 2;

-	while (--i >= 0)

-	    *buf++ = *data++;

-    }

-    return 0;

-}

-#endif /* LONG64 */

-

-#ifdef WORD64

-

-/*

- * XXX This is a *really* stupid way of doing this.  It should just use

- * dpy->bufptr directly, taking into account where in the word it is.

- */

-

-/*

- * Data16 - Place 16 bit data in the buffer.

- *

- * "dpy" is a pointer to a Display.

- * "data" is a pointer to the data.

- * "len" is the length in bytes of the data.

- */

-

-static doData16(

-    register Display *dpy,

-    short *data,

-    unsigned len,

-    char *packbuffer)

-{

-    long *lp,*lpack;

-    long i, nwords,bits;

-    long mask16 = 0x000000000000ffff;

-

-        lp = (long *)data;

-        lpack = (long *)packbuffer;

-

-/*  nwords is the number of 16 bit values to be packed,

- *  the low order 16 bits of each word will be packed

- *  into 64 bit words

- */

-        nwords = len >> 1;

-        bits = 48;

-

-        for(i=0;i<nwords;i++){

-	   if (bits == 48) *lpack = 0;

-           *lpack ^= (*lp & mask16) << bits;

-           bits -= 16 ;

-           lp++;

-           if(bits < 0){

-               lpack++;

-               bits = 48;

-           }

-        }

-        Data(dpy, packbuffer, len);

-}

-

-_XData16 (

-    Display *dpy,

-    short *data,

-    unsigned len)

-{

-    char packbuffer[PACKBUFFERSIZE];

-    unsigned nunits = PACKBUFFERSIZE >> 1;

-

-    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {

-	doData16 (dpy, data, PACKBUFFERSIZE, packbuffer);

-    }

-    if (len) doData16 (dpy, data, len, packbuffer);

-}

-

-/*

- * Data32 - Place 32 bit data in the buffer.

- *

- * "dpy" is a pointer to a Display.

- * "data" is a pointer to the data.

- * "len" is the length in bytes of the data.

- */

-

-static doData32(

-    register Display *dpy

-    long *data,

-    unsigned len,

-    char *packbuffer)

-{

-    long *lp,*lpack;

-    long i,bits,nwords;

-    long mask32 = 0x00000000ffffffff;

-

-        lpack = (long *) packbuffer;

-        lp = data;

-

-/*  nwords is the number of 32 bit values to be packed

- *  the low order 32 bits of each word will be packed

- *  into 64 bit words

- */

-        nwords = len >> 2;

-        bits = 32;

-

-        for(i=0;i<nwords;i++){

-	   if (bits == 32) *lpack = 0;

-           *lpack ^= (*lp & mask32) << bits;

-           bits = bits ^32;

-           lp++;

-           if(bits)

-              lpack++;

-        }

-        Data(dpy, packbuffer, len);

-}

-

-void _XData32(

-    Display *dpy,

-    long *data,

-    unsigned len)

-{

-    char packbuffer[PACKBUFFERSIZE];

-    unsigned nunits = PACKBUFFERSIZE >> 2;

-

-    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {

-	doData32 (dpy, data, PACKBUFFERSIZE, packbuffer);

-    }

-    if (len) doData32 (dpy, data, len, packbuffer);

-}

-

-#endif /* WORD64 */

-

-

-/* Make sure this produces the same string as DefineLocal/DefineSelf in xdm.

- * Otherwise, Xau will not be able to find your cookies in the Xauthority file.

- *

- * Note: POSIX says that the ``nodename'' member of utsname does _not_ have

- *       to have sufficient information for interfacing to the network,

- *       and so, you may be better off using gethostname (if it exists).

- */

-

-#if (defined(_POSIX_SOURCE) && !defined(AIXV3) && !defined(__QNX__)) || defined(hpux) || defined(SVR4)

-#define NEED_UTSNAME

-#include <sys/utsname.h>

-#else

-#ifdef HAVE_UNISTD_H

-#include <unistd.h>

-#endif

-#endif

-

-/*

- * _XGetHostname - similar to gethostname but allows special processing.

- */

-int _XGetHostname (

-    char *buf,

-    int maxlen)

-{

-    int len;

-

-#ifdef NEED_UTSNAME

-    struct utsname name;

-

-    if (maxlen <= 0 || buf == NULL)

-	return 0;

-

-    uname (&name);

-    len = strlen (name.nodename);

-    if (len >= maxlen) len = maxlen - 1;

-    strncpy (buf, name.nodename, len);

-    buf[len] = '\0';

-#else

-    if (maxlen <= 0 || buf == NULL)

-	return 0;

-

-    buf[0] = '\0';

-    (void) gethostname (buf, maxlen);

-    buf [maxlen - 1] = '\0';

-    len = strlen(buf);

-#endif /* NEED_UTSNAME */

-    return len;

-}

-

-

-/*

- * _XScreenOfWindow - get the Screen of a given window

- */

-

-Screen *_XScreenOfWindow(Display *dpy, Window w)

-{

-    register int i;

-    Window root;

-    int x, y;				/* dummy variables */

-    unsigned int width, height, bw, depth;  /* dummy variables */

-

-    if (XGetGeometry (dpy, w, &root, &x, &y, &width, &height,

-		      &bw, &depth) == False) {

-	return NULL;

-    }

-    for (i = 0; i < ScreenCount (dpy); i++) {	/* find root from list */

-	if (root == RootWindow (dpy, i)) {

-	    return ScreenOfDisplay (dpy, i);

-	}

-    }

-    return NULL;

-}

-

-

-#if defined(WIN32)

-

-/*

- * These functions are intended to be used internally to Xlib only.

- * These functions will always prefix the path with a DOS drive in the

- * form "<drive-letter>:". As such, these functions are only suitable

- * for use by Xlib function that supply a root-based path to some

- * particular file, e.g. <ProjectRoot>/lib/X11/locale/locale.dir will

- * be converted to "C:/usr/X11R6.3/lib/X11/locale/locale.dir".

- */

-

-static int access_file (path, pathbuf, len_pathbuf, pathret)

-    char* path;

-    char* pathbuf;

-    int len_pathbuf;

-    char** pathret;

-{

-    if (access (path, F_OK) == 0) {

-	if (strlen (path) < len_pathbuf)

-	    *pathret = pathbuf;

-	else

-	    *pathret = Xmalloc (strlen (path) + 1);

-	if (*pathret) {

-	    strcpy (*pathret, path);

-	    return 1;

-	}

-    }

-    return 0;

-}

-

-static int AccessFile (path, pathbuf, len_pathbuf, pathret)

-    char* path;

-    char* pathbuf;

-    int len_pathbuf;

-    char** pathret;

-{

-    unsigned long drives;

-    int i, len;

-    char* drive;

-    char buf[MAX_PATH];

-    char* bufp;

-

-    /* just try the "raw" name first and see if it works */

-    if (access_file (path, pathbuf, len_pathbuf, pathret))

-	return 1;

-

-    /* try the places set in the environment */

-    drive = getenv ("_XBASEDRIVE");

-#ifdef __UNIXOS2__

-    if (!drive)

-	drive = getenv ("X11ROOT");

-#endif

-    if (!drive)

-	drive = "C:";

-    len = strlen (drive) + strlen (path);

-    if (len < MAX_PATH) bufp = buf;

-    else bufp = Xmalloc (len + 1);

-    strcpy (bufp, drive);

-    strcat (bufp, path);

-    if (access_file (bufp, pathbuf, len_pathbuf, pathret)) {

-	if (bufp != buf) Xfree (bufp);

-	return 1;

-    }

-

-#ifndef __UNIXOS2__

-    /* one last place to look */

-    drive = getenv ("HOMEDRIVE");

-    if (drive) {

-	len = strlen (drive) + strlen (path);

-	if (len < MAX_PATH) bufp = buf;

-	else bufp = Xmalloc (len + 1);

-	strcpy (bufp, drive);

-	strcat (bufp, path);

-	if (access_file (bufp, pathbuf, len_pathbuf, pathret)) {

-	    if (bufp != buf) Xfree (bufp);

-	    return 1;

-	}

-    }

-

-    /* tried everywhere else, go fishing */

-#define C_DRIVE ('C' - 'A')

-#define Z_DRIVE ('Z' - 'A')

-    /* does OS/2 (with or with gcc-emx) have getdrives? */

-    drives = _getdrives ();

-    for (i = C_DRIVE; i <= Z_DRIVE; i++) { /* don't check on A: or B: */

-	if ((1 << i) & drives) {

-	    len = 2 + strlen (path);

-	    if (len < MAX_PATH) bufp = buf;

-	    else bufp = Xmalloc (len + 1);

-	    *bufp = 'A' + i;

-	    *(bufp + 1) = ':';

-	    *(bufp + 2) = '\0';

-	    strcat (bufp, path);

-	    if (access_file (bufp, pathbuf, len_pathbuf, pathret)) {

-		if (bufp != buf) Xfree (bufp);

-		return 1;

-	    }

-	}

-    }

-#endif

-    return 0;

-}

-

-int _XOpenFile(path, flags)

-    _Xconst char* path;

-    int flags;

-{

-    char buf[MAX_PATH];

-    char* bufp = NULL;

-    int ret = -1;

-    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);

-

-    if (AccessFile (path, buf, MAX_PATH, &bufp))

-	ret = open (bufp, flags);

-

-    (void) SetErrorMode (olderror);

-

-    if (bufp != buf) Xfree (bufp);

-

-    return ret;

-}

-

-int _XOpenFileMode(path, flags, mode)

-    _Xconst char* path;

-    int flags;

-    mode_t mode;

-{

-    char buf[MAX_PATH];

-    char* bufp = NULL;

-    int ret = -1;

-    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);

-

-    if (AccessFile (path, buf, MAX_PATH, &bufp))

-	ret = open (bufp, flags, mode);

-

-    (void) SetErrorMode (olderror);

-

-    if (bufp != buf) Xfree (bufp);

-

-    return ret;

-}

-

-void* _XFopenFile(path, mode)

-    _Xconst char* path;

-    _Xconst char* mode;

-{

-    char buf[MAX_PATH];

-    char* bufp = NULL;

-    void* ret = NULL;

-    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);

-

-    if (AccessFile (path, buf, MAX_PATH, &bufp))

-	ret = fopen (bufp, mode);

-

-    (void) SetErrorMode (olderror);

-

-    if (bufp != buf) Xfree (bufp);

-

-    return ret;

-}

-

-int _XAccessFile(path)

-    _Xconst char* path;

-{

-    char buf[MAX_PATH];

-    char* bufp;

-    int ret = -1;

-    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);

-

-    ret = AccessFile (path, buf, MAX_PATH, &bufp);

-

-    (void) SetErrorMode (olderror);

-

-    if (bufp != buf) Xfree (bufp);

-

-    return ret;

-}

-

-#endif

-

-#ifdef WIN32

-#undef _Xdebug

-int _Xdebug = 0;

-int *_Xdebug_p = &_Xdebug;

-void (**_XCreateMutex_fn_p)(LockInfoPtr) = &_XCreateMutex_fn;

-void (**_XFreeMutex_fn_p)(LockInfoPtr) = &_XFreeMutex_fn;

-void (**_XLockMutex_fn_p)(LockInfoPtr

-#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)

-    , char * /* file */

-    , int /* line */

-#endif

-        ) = &_XLockMutex_fn;

-void (**_XUnlockMutex_fn_p)(LockInfoPtr

-#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)

-    , char * /* file */

-    , int /* line */

-#endif

-        ) = &_XUnlockMutex_fn;

-LockInfoPtr *_Xglobal_lock_p = &_Xglobal_lock;

-#endif

+/*
+
+Copyright 1985, 1986, 1987, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from The Open Group.
+
+*/
+
+/*
+ *	XlibInt.c - Internal support routines for the C subroutine
+ *	interface library (Xlib) to the X Window System Protocol V11.0.
+ */
+
+#ifdef WIN32
+#define _XLIBINT_
+#endif
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xprivate.h"
+#include <X11/Xpoll.h>
+#include <assert.h>
+#include <stdio.h>
+#ifdef WIN32
+#include <direct.h>
+#endif
+
+#ifdef XTHREADS
+#include "locking.h"
+
+/* these pointers get initialized by XInitThreads */
+LockInfoPtr _Xglobal_lock = NULL;
+void (*_XCreateMutex_fn)(LockInfoPtr) = NULL;
+/* struct _XCVList *(*_XCreateCVL_fn)() = NULL; */
+void (*_XFreeMutex_fn)(LockInfoPtr) = NULL;
+void (*_XLockMutex_fn)(
+    LockInfoPtr /* lock */
+#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
+    , char * /* file */
+    , int /* line */
+#endif
+    ) = NULL;
+void (*_XUnlockMutex_fn)(
+    LockInfoPtr /* lock */
+#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
+    , char * /* file */
+    , int /* line */
+#endif
+    ) = NULL;
+xthread_t (*_Xthread_self_fn)(void) = NULL;
+
+#define XThread_Self()	((*_Xthread_self_fn)())
+
+#endif /* XTHREADS */
+
+/* check for both EAGAIN and EWOULDBLOCK, because some supposedly POSIX
+ * systems are broken and return EWOULDBLOCK when they should return EAGAIN
+ */
+#ifdef WIN32
+#define ETEST() (WSAGetLastError() == WSAEWOULDBLOCK)
+#else
+#ifdef __CYGWIN__ /* Cygwin uses ENOBUFS to signal socket is full */
+#define ETEST() (errno == EAGAIN || errno == EWOULDBLOCK || errno == ENOBUFS)
+#else
+#if defined(EAGAIN) && defined(EWOULDBLOCK)
+#define ETEST() (errno == EAGAIN || errno == EWOULDBLOCK)
+#else
+#ifdef EAGAIN
+#define ETEST() (errno == EAGAIN)
+#else
+#define ETEST() (errno == EWOULDBLOCK)
+#endif /* EAGAIN */
+#endif /* EAGAIN && EWOULDBLOCK */
+#endif /* __CYGWIN__ */
+#endif /* WIN32 */
+
+#ifdef WIN32
+#define ECHECK(err) (WSAGetLastError() == err)
+#define ESET(val) WSASetLastError(val)
+#else
+#ifdef __UNIXOS2__
+#define ECHECK(err) (errno == err)
+#define ESET(val)
+#else
+#define ECHECK(err) (errno == err)
+#define ESET(val) errno = val
+#endif
+#endif
+
+#if defined(LOCALCONN) || defined(LACHMAN)
+#ifdef EMSGSIZE
+#define ESZTEST() (ECHECK(EMSGSIZE) || ECHECK(ERANGE))
+#else
+#define ESZTEST() ECHECK(ERANGE)
+#endif
+#else
+#ifdef EMSGSIZE
+#define ESZTEST() ECHECK(EMSGSIZE)
+#endif
+#endif
+
+#ifdef __UNIXOS2__
+#include <limits.h>
+#define MAX_PATH _POSIX_PATH_MAX
+#endif
+
+/*
+ * The following routines are internal routines used by Xlib for protocol
+ * packet transmission and reception.
+ *
+ * _XIOError(Display *) will be called if any sort of system call error occurs.
+ * This is assumed to be a fatal condition, i.e., XIOError should not return.
+ *
+ * _XError(Display *, xError *) will be called whenever an X_Error event is
+ * received.  This is not assumed to be a fatal condition, i.e., it is
+ * acceptable for this procedure to return.  However, XError should NOT
+ * perform any operations (directly or indirectly) on the DISPLAY.
+ *
+ * Routines declared with a return type of 'Status' return 0 on failure,
+ * and non 0 on success.  Routines with no declared return type don't
+ * return anything.  Whenever possible routines that create objects return
+ * the object they have created.
+ */
+
+#define POLLFD_CACHE_SIZE 5
+
+/* initialize the struct array passed to poll() below */
+Bool _XPollfdCacheInit(
+    Display *dpy)
+{
+#ifdef USE_POLL
+    struct pollfd *pfp;
+
+    pfp = (struct pollfd *)Xmalloc(POLLFD_CACHE_SIZE * sizeof(struct pollfd));
+    if (!pfp)
+	return False;
+    pfp[0].fd = dpy->fd;
+    pfp[0].events = POLLIN;
+
+    dpy->filedes = (XPointer)pfp;
+#endif
+    return True;
+}
+
+void _XPollfdCacheAdd(
+    Display *dpy,
+    int fd)
+{
+#ifdef USE_POLL
+    struct pollfd *pfp = (struct pollfd *)dpy->filedes;
+
+    if (dpy->im_fd_length <= POLLFD_CACHE_SIZE) {
+	pfp[dpy->im_fd_length].fd = fd;
+	pfp[dpy->im_fd_length].events = POLLIN;
+    }
+#endif
+}
+
+/* ARGSUSED */
+void _XPollfdCacheDel(
+    Display *dpy,
+    int fd)			/* not used */
+{
+#ifdef USE_POLL
+    struct pollfd *pfp = (struct pollfd *)dpy->filedes;
+    struct _XConnectionInfo *conni;
+
+    /* just recalculate whole list */
+    if (dpy->im_fd_length <= POLLFD_CACHE_SIZE) {
+	int loc = 1;
+	for (conni = dpy->im_fd_info; conni; conni=conni->next) {
+	    pfp[loc].fd = conni->fd;
+	    pfp[loc].events = POLLIN;
+	    loc++;
+	}
+    }
+#endif
+}
+
+static int sync_hazard(Display *dpy)
+{
+    unsigned long span = dpy->request - dpy->last_request_read;
+    unsigned long hazard = min((dpy->bufmax - dpy->buffer) / SIZEOF(xReq), 65535 - 10);
+    return span >= 65535 - hazard - 10;
+}
+
+static
+void sync_while_locked(Display *dpy)
+{
+#ifdef XTHREADS
+    if (dpy->lock)
+        (*dpy->lock->user_lock_display)(dpy);
+#endif
+    UnlockDisplay(dpy);
+    SyncHandle();
+    InternalLockDisplay(dpy, /* don't skip user locks */ 0);
+#ifdef XTHREADS
+    if (dpy->lock)
+        (*dpy->lock->user_unlock_display)(dpy);
+#endif
+}
+
+void _XSeqSyncFunction(
+    register Display *dpy)
+{
+    xGetInputFocusReply rep;
+    register xReq *req;
+
+    if ((dpy->request - dpy->last_request_read) >= (65535 - BUFSIZE/SIZEOF(xReq))) {
+	GetEmptyReq(GetInputFocus, req);
+	(void) _XReply (dpy, (xReply *)&rep, 0, xTrue);
+	sync_while_locked(dpy);
+    } else if (sync_hazard(dpy))
+	_XSetPrivSyncFunction(dpy);
+}
+
+/* NOTE: only called if !XTHREADS, or when XInitThreads wasn't called. */
+static int
+_XPrivSyncFunction (Display *dpy)
+{
+#if XTHREADS
+    assert(!dpy->lock_fns);
+#endif
+    assert(dpy->synchandler == _XPrivSyncFunction);
+    assert((dpy->flags & XlibDisplayPrivSync) != 0);
+    dpy->synchandler = dpy->savedsynchandler;
+    dpy->savedsynchandler = NULL;
+    dpy->flags &= ~XlibDisplayPrivSync;
+    if(dpy->synchandler)
+        dpy->synchandler(dpy);
+    _XIDHandler(dpy);
+    _XSeqSyncFunction(dpy);
+    return 0;
+}
+
+void _XSetPrivSyncFunction(Display *dpy)
+{
+#ifdef XTHREADS
+    if (dpy->lock_fns)
+        return;
+#endif
+    if (!(dpy->flags & XlibDisplayPrivSync)) {
+	dpy->savedsynchandler = dpy->synchandler;
+	dpy->synchandler = _XPrivSyncFunction;
+	dpy->flags |= XlibDisplayPrivSync;
+    }
+}
+
+void _XSetSeqSyncFunction(Display *dpy)
+{
+    if (sync_hazard(dpy))
+	_XSetPrivSyncFunction (dpy);
+}
+
+#ifdef LONG64
+void _XRead32(
+    Display *dpy,
+    register long *data,
+    long len)
+{
+    register int *buf;
+    register long i;
+
+    if (len) {
+	(void) _XRead(dpy, (char *)data, len);
+	i = len >> 2;
+	buf = (int *)data + i;
+	data += i;
+	while (--i >= 0)
+	    *--data = *--buf;
+    }
+}
+#endif /* LONG64 */
+
+#ifdef WORD64
+
+/*
+ * XXX This is a *really* stupid way of doing this....
+ * PACKBUFFERSIZE must be a multiple of 4.
+ */
+
+#define PACKBUFFERSIZE 4096
+
+
+/*
+ * _XRead32 - Read bytes from the socket unpacking each 32 bits
+ *            into a long (64 bits on a CRAY computer).
+ *
+ */
+static void _doXRead32(
+        register Display *dpy,
+        register long *data
+        register long size,
+	register char *packbuffer)
+{
+ long *lpack,*lp;
+ long mask32 = 0x00000000ffffffff;
+ long maskw, nwords, i, bits;
+
+        _XReadPad (dpy, packbuffer, size);
+
+        lp = data;
+        lpack = (long *) packbuffer;
+        nwords = size >> 2;
+        bits = 32;
+
+        for(i=0;i<nwords;i++){
+            maskw = mask32 << bits;
+           *lp++ = ( *lpack & maskw ) >> bits;
+            bits = bits ^32;
+            if(bits){
+               lpack++;
+            }
+        }
+}
+
+void _XRead32(
+    Display *dpy,
+    long *data,
+    long len)
+{
+    char packbuffer[PACKBUFFERSIZE];
+    unsigned nunits = PACKBUFFERSIZE >> 2;
+
+    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {
+	_doXRead32 (dpy, data, PACKBUFFERSIZE, packbuffer);
+    }
+    if (len) _doXRead32 (dpy, data, len, packbuffer);
+}
+
+
+
+/*
+ * _XRead16 - Read bytes from the socket unpacking each 16 bits
+ *            into a long (64 bits on a CRAY computer).
+ *
+ */
+static _doXRead16(
+        register Display *dpy,
+        register short *data,
+        register long size,
+	char *packbuffer)
+{
+	long *lpack,*lp;
+	long mask16 = 0x000000000000ffff;
+	long maskw, nwords, i, bits;
+
+        (void) _XRead(dpy,packbuffer,size);	/* don't do a padded read... */
+
+        lp = (long *) data;
+        lpack = (long *) packbuffer;
+        nwords = size >> 1;  /* number of 16 bit words to be unpacked */
+        bits = 48;
+        for(i=0;i<nwords;i++){
+            maskw = mask16 << bits;
+           *lp++ = ( *lpack & maskw ) >> bits;
+            bits -= 16;
+            if(bits < 0){
+               lpack++;
+               bits = 48;
+            }
+        }
+}
+
+void _XRead16(
+    Display *dpy,
+    short *data,
+    long len)
+{
+    char packbuffer[PACKBUFFERSIZE];
+    unsigned nunits = PACKBUFFERSIZE >> 1;
+
+    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {
+	_doXRead16 (dpy, data, PACKBUFFERSIZE, packbuffer);
+    }
+    if (len) _doXRead16 (dpy, data, len, packbuffer);
+}
+
+void _XRead16Pad(
+    Display *dpy,
+    short *data,
+    long size)
+{
+    int slop = (size & 3);
+    short slopbuf[3];
+
+    _XRead16 (dpy, data, size);
+    if (slop > 0) {
+	_XRead16 (dpy, slopbuf, 4 - slop);
+    }
+}
+#endif /* WORD64 */
+
+/*
+ * The hard part about this is that we only get 16 bits from a reply.
+ * We have three values that will march along, with the following invariant:
+ *	dpy->last_request_read <= rep->sequenceNumber <= dpy->request
+ * We have to keep
+ *	dpy->request - dpy->last_request_read < 2^16
+ * or else we won't know for sure what value to use in events.  We do this
+ * by forcing syncs when we get close.
+ */
+
+unsigned long
+_XSetLastRequestRead(
+    register Display *dpy,
+    register xGenericReply *rep)
+{
+    register unsigned long	newseq, lastseq;
+
+    lastseq = dpy->last_request_read;
+    /*
+     * KeymapNotify has no sequence number, but is always guaranteed
+     * to immediately follow another event, except when generated via
+     * SendEvent (hmmm).
+     */
+    if ((rep->type & 0x7f) == KeymapNotify)
+	return(lastseq);
+
+    newseq = (lastseq & ~((unsigned long)0xffff)) | rep->sequenceNumber;
+
+    if (newseq < lastseq) {
+	newseq += 0x10000;
+	if (newseq > dpy->request) {
+	    (void) fprintf (stderr,
+	    "Xlib: sequence lost (0x%lx > 0x%lx) in reply type 0x%x!\n",
+			    newseq, dpy->request,
+			    (unsigned int) rep->type);
+	    newseq -= 0x10000;
+	}
+    }
+
+    dpy->last_request_read = newseq;
+    return(newseq);
+}
+
+/*
+ * Support for internal connections, such as an IM might use.
+ * By Stephen Gildea, X Consortium, September 1993
+ */
+
+/* _XRegisterInternalConnection
+ * Each IM (or Xlib extension) that opens a file descriptor that Xlib should
+ * include in its select/poll mask must call this function to register the
+ * fd with Xlib.  Any XConnectionWatchProc registered by XAddConnectionWatch
+ * will also be called.
+ *
+ * Whenever Xlib detects input available on fd, it will call callback
+ * with call_data to process it.  If non-Xlib code calls select/poll
+ * and detects input available, it must call XProcessInternalConnection,
+ * which will call the associated callback.
+ *
+ * Non-Xlib code can learn about these additional fds by calling
+ * XInternalConnectionNumbers or, more typically, by registering
+ * a XConnectionWatchProc with XAddConnectionWatch
+ * to be called when fds are registered or unregistered.
+ *
+ * Returns True if registration succeeded, False if not, typically
+ * because could not allocate memory.
+ * Assumes Display locked when called.
+ */
+Status
+_XRegisterInternalConnection(
+    Display* dpy,
+    int fd,
+    _XInternalConnectionProc callback,
+    XPointer call_data
+)
+{
+    struct _XConnectionInfo *new_conni, **iptr;
+    struct _XConnWatchInfo *watchers;
+    XPointer *wd;
+
+    new_conni = (struct _XConnectionInfo*)Xmalloc(sizeof(struct _XConnectionInfo));
+    if (!new_conni)
+	return 0;
+    new_conni->watch_data = (XPointer *)Xmalloc(dpy->watcher_count * sizeof(XPointer));
+    if (!new_conni->watch_data) {
+	Xfree(new_conni);
+	return 0;
+    }
+    new_conni->fd = fd;
+    new_conni->read_callback = callback;
+    new_conni->call_data = call_data;
+    new_conni->next = NULL;
+    /* link new structure onto end of list */
+    for (iptr = &dpy->im_fd_info; *iptr; iptr = &(*iptr)->next)
+	;
+    *iptr = new_conni;
+    dpy->im_fd_length++;
+    _XPollfdCacheAdd(dpy, fd);
+
+    for (watchers=dpy->conn_watchers, wd=new_conni->watch_data;
+	 watchers;
+	 watchers=watchers->next, wd++) {
+	*wd = NULL;		/* for cleanliness */
+	(*watchers->fn) (dpy, watchers->client_data, fd, True, wd);
+    }
+
+    return 1;
+}
+
+/* _XUnregisterInternalConnection
+ * Each IM (or Xlib extension) that closes a file descriptor previously
+ * registered with _XRegisterInternalConnection must call this function.
+ * Any XConnectionWatchProc registered by XAddConnectionWatch
+ * will also be called.
+ *
+ * Assumes Display locked when called.
+ */
+void
+_XUnregisterInternalConnection(
+    Display* dpy,
+    int fd
+)
+{
+    struct _XConnectionInfo *info_list, **prev;
+    struct _XConnWatchInfo *watch;
+    XPointer *wd;
+
+    for (prev = &dpy->im_fd_info; (info_list = *prev);
+	 prev = &info_list->next) {
+	if (info_list->fd == fd) {
+	    *prev = info_list->next;
+	    dpy->im_fd_length--;
+	    for (watch=dpy->conn_watchers, wd=info_list->watch_data;
+		 watch;
+		 watch=watch->next, wd++) {
+		(*watch->fn) (dpy, watch->client_data, fd, False, wd);
+	    }
+	    if (info_list->watch_data)
+		Xfree (info_list->watch_data);
+	    Xfree (info_list);
+	    break;
+	}
+    }
+    _XPollfdCacheDel(dpy, fd);
+}
+
+/* XInternalConnectionNumbers
+ * Returns an array of fds and an array of corresponding call data.
+ * Typically a XConnectionWatchProc registered with XAddConnectionWatch
+ * will be used instead of this function to discover
+ * additional fds to include in the select/poll mask.
+ *
+ * The list is allocated with Xmalloc and should be freed by the caller
+ * with Xfree;
+ */
+Status
+XInternalConnectionNumbers(
+    Display *dpy,
+    int **fd_return,
+    int *count_return
+)
+{
+    int count;
+    struct _XConnectionInfo *info_list;
+    int *fd_list;
+
+    LockDisplay(dpy);
+    count = 0;
+    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next)
+	count++;
+    fd_list = (int*) Xmalloc (count * sizeof(int));
+    if (!fd_list) {
+	UnlockDisplay(dpy);
+	return 0;
+    }
+    count = 0;
+    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {
+	fd_list[count] = info_list->fd;
+	count++;
+    }
+    UnlockDisplay(dpy);
+
+    *fd_return = fd_list;
+    *count_return = count;
+    return 1;
+}
+
+void _XProcessInternalConnection(
+    Display *dpy,
+    struct _XConnectionInfo *conn_info)
+{
+    dpy->flags |= XlibDisplayProcConni;
+    UnlockDisplay(dpy);
+    (*conn_info->read_callback) (dpy, conn_info->fd, conn_info->call_data);
+    LockDisplay(dpy);
+    dpy->flags &= ~XlibDisplayProcConni;
+}
+
+/* XProcessInternalConnection
+ * Call the _XInternalConnectionProc registered by _XRegisterInternalConnection
+ * for this fd.
+ * The Display is NOT locked during the call.
+ */
+void
+XProcessInternalConnection(
+    Display* dpy,
+    int fd
+)
+{
+    struct _XConnectionInfo *info_list;
+
+    LockDisplay(dpy);
+    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {
+	if (info_list->fd == fd) {
+	    _XProcessInternalConnection(dpy, info_list);
+	    break;
+	}
+    }
+    UnlockDisplay(dpy);
+}
+
+/* XAddConnectionWatch
+ * Register a callback to be called whenever _XRegisterInternalConnection
+ * or _XUnregisterInternalConnection is called.
+ * Callbacks are called with the Display locked.
+ * If any connections are already registered, the callback is immediately
+ * called for each of them.
+ */
+Status
+XAddConnectionWatch(
+    Display* dpy,
+    XConnectionWatchProc callback,
+    XPointer client_data
+)
+{
+    struct _XConnWatchInfo *new_watcher, **wptr;
+    struct _XConnectionInfo *info_list;
+    XPointer *wd_array;
+
+    LockDisplay(dpy);
+
+    /* allocate new watch data */
+    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {
+	wd_array = (XPointer *)Xrealloc((char *)info_list->watch_data,
+					(dpy->watcher_count + 1) *
+					sizeof(XPointer));
+	if (!wd_array) {
+	    UnlockDisplay(dpy);
+	    return 0;
+	}
+	wd_array[dpy->watcher_count] = NULL;	/* for cleanliness */
+    }
+
+    new_watcher = (struct _XConnWatchInfo*)Xmalloc(sizeof(struct _XConnWatchInfo));
+    if (!new_watcher) {
+	UnlockDisplay(dpy);
+	return 0;
+    }
+    new_watcher->fn = callback;
+    new_watcher->client_data = client_data;
+    new_watcher->next = NULL;
+
+    /* link new structure onto end of list */
+    for (wptr = &dpy->conn_watchers; *wptr; wptr = &(*wptr)->next)
+	;
+    *wptr = new_watcher;
+    dpy->watcher_count++;
+
+    /* call new watcher on all currently registered fds */
+    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {
+	(*callback) (dpy, client_data, info_list->fd, True,
+		     info_list->watch_data + dpy->watcher_count - 1);
+    }
+
+    UnlockDisplay(dpy);
+    return 1;
+}
+
+/* XRemoveConnectionWatch
+ * Unregister a callback registered by XAddConnectionWatch.
+ * Both callback and client_data must match what was passed to
+ * XAddConnectionWatch.
+ */
+void
+XRemoveConnectionWatch(
+    Display* dpy,
+    XConnectionWatchProc callback,
+    XPointer client_data
+)
+{
+    struct _XConnWatchInfo *watch;
+    struct _XConnWatchInfo *previous = NULL;
+    struct _XConnectionInfo *conni;
+    int counter = 0;
+
+    LockDisplay(dpy);
+    for (watch=dpy->conn_watchers; watch; watch=watch->next) {
+	if (watch->fn == callback  &&  watch->client_data == client_data) {
+	    if (previous)
+		previous->next = watch->next;
+	    else
+		dpy->conn_watchers = watch->next;
+	    Xfree (watch);
+	    dpy->watcher_count--;
+	    /* remove our watch_data for each connection */
+	    for (conni=dpy->im_fd_info; conni; conni=conni->next) {
+		/* don't bother realloc'ing; these arrays are small anyway */
+		/* overlapping */
+		memmove(conni->watch_data+counter,
+			conni->watch_data+counter+1,
+			dpy->watcher_count - counter);
+	    }
+	    break;
+	}
+	previous = watch;
+	counter++;
+    }
+    UnlockDisplay(dpy);
+}
+
+/* end of internal connections support */
+
+/* Cookie jar implementation
+   dpy->cookiejar is a linked list. _XEnq receives the events but leaves
+   them in the normal EQ. _XStoreEvent returns the cookie event (minus
+   data pointer) and adds it to the cookiejar. _XDeq just removes
+   the entry like any other event but resets the data pointer for
+   cookie events (to avoid double-free, the memory is re-used by Xlib).
+
+   _XFetchEventCookie (called from XGetEventData) removes a cookie from the
+   jar. _XFreeEventCookies removes all unclaimed cookies from the jar
+   (called by XNextEvent).
+
+   _XFreeDisplayStructure calls _XFreeEventCookies for each cookie in the
+   normal EQ.
+ */
+
+#include "utlist.h"
+struct stored_event {
+    XGenericEventCookie ev;
+    struct stored_event *prev;
+    struct stored_event *next;
+};
+
+Bool
+_XIsEventCookie(Display *dpy, XEvent *ev)
+{
+    return (ev->xcookie.type == GenericEvent &&
+	    dpy->generic_event_vec[ev->xcookie.extension & 0x7F] != NULL);
+}
+
+/**
+ * Free all events in the event list.
+ */
+void
+_XFreeEventCookies(Display *dpy)
+{
+    struct stored_event **head, *e, *tmp;
+
+    if (!dpy->cookiejar)
+        return;
+
+    head = (struct stored_event**)&dpy->cookiejar;
+
+    DL_FOREACH_SAFE(*head, e, tmp) {
+        if (dpy->cookiejar == e)
+            dpy->cookiejar = NULL;
+        XFree(e->ev.data);
+        XFree(e);
+    }
+}
+
+/**
+ * Add an event to the display's event list. This event must be freed on the
+ * next call to XNextEvent().
+ */
+void
+_XStoreEventCookie(Display *dpy, XEvent *event)
+{
+    XGenericEventCookie* cookie = &event->xcookie;
+    struct stored_event **head, *add;
+
+    if (!_XIsEventCookie(dpy, event))
+        return;
+
+    head = (struct stored_event**)(&dpy->cookiejar);
+
+    add = Xmalloc(sizeof(struct stored_event));
+    if (!add) {
+        ESET(ENOMEM);
+        _XIOError(dpy);
+    }
+    add->ev = *cookie;
+    DL_APPEND(*head, add);
+    cookie->data = NULL; /* don't return data yet, must be claimed */
+}
+
+/**
+ * Return the event with the given cookie and remove it from the list.
+ */
+Bool
+_XFetchEventCookie(Display *dpy, XGenericEventCookie* ev)
+{
+    Bool ret = False;
+    struct stored_event **head, *event;
+    head = (struct stored_event**)&dpy->cookiejar;
+
+    if (!_XIsEventCookie(dpy, (XEvent*)ev))
+        return ret;
+
+    DL_FOREACH(*head, event) {
+        if (event->ev.cookie == ev->cookie &&
+            event->ev.extension == ev->extension &&
+            event->ev.evtype == ev->evtype) {
+            *ev = event->ev;
+            DL_DELETE(*head, event);
+            Xfree(event);
+            ret = True;
+            break;
+        }
+    }
+
+    return ret;
+}
+
+Bool
+_XCopyEventCookie(Display *dpy, XGenericEventCookie *in, XGenericEventCookie *out)
+{
+    Bool ret = False;
+    int extension;
+
+    if (!_XIsEventCookie(dpy, (XEvent*)in) || !out)
+        return ret;
+
+    extension = in->extension & 0x7F;
+
+    if (!dpy->generic_event_copy_vec[extension])
+        return ret;
+
+    ret = ((*dpy->generic_event_copy_vec[extension])(dpy, in, out));
+    out->cookie = ret ? ++dpy->next_cookie  : 0;
+    return ret;
+}
+
+
+/*
+ * _XEnq - Place event packets on the display's queue.
+ * note that no squishing of move events in V11, since there
+ * is pointer motion hints....
+ */
+void _XEnq(
+	register Display *dpy,
+	register xEvent *event)
+{
+	register _XQEvent *qelt;
+	int type, extension;
+
+	if ((qelt = dpy->qfree)) {
+		/* If dpy->qfree is non-NULL do this, else malloc a new one. */
+		dpy->qfree = qelt->next;
+	}
+	else if ((qelt =
+	    (_XQEvent *) Xmalloc((unsigned)sizeof(_XQEvent))) == NULL) {
+		/* Malloc call failed! */
+		ESET(ENOMEM);
+		_XIOError(dpy);
+	}
+	qelt->next = NULL;
+
+	type = event->u.u.type & 0177;
+	extension = ((xGenericEvent*)event)->extension;
+
+	qelt->event.type = type;
+	/* If an extension has registerd a generic_event_vec handler, then
+	 * it can handle event cookies. Otherwise, proceed with the normal
+	 * event handlers.
+	 *
+	 * If the generic_event_vec is called, qelt->event is a event cookie
+	 * with the data pointer and the "free" pointer set. Data pointer is
+	 * some memory allocated by the extension.
+	 */
+        if (type == GenericEvent && dpy->generic_event_vec[extension & 0x7F]) {
+	    XGenericEventCookie *cookie = &qelt->event.xcookie;
+	    (*dpy->generic_event_vec[extension & 0x7F])(dpy, cookie, event);
+	    cookie->cookie = ++dpy->next_cookie;
+
+	    qelt->qserial_num = dpy->next_event_serial_num++;
+	    if (dpy->tail)	dpy->tail->next = qelt;
+	    else		dpy->head = qelt;
+
+	    dpy->tail = qelt;
+	    dpy->qlen++;
+	} else if ((*dpy->event_vec[type])(dpy, &qelt->event, event)) {
+	    qelt->qserial_num = dpy->next_event_serial_num++;
+	    if (dpy->tail)	dpy->tail->next = qelt;
+	    else 		dpy->head = qelt;
+
+	    dpy->tail = qelt;
+	    dpy->qlen++;
+	} else {
+	    /* ignored, or stashed away for many-to-one compression */
+	    qelt->next = dpy->qfree;
+	    dpy->qfree = qelt;
+	}
+}
+
+/*
+ * _XDeq - Remove event packet from the display's queue.
+ */
+void _XDeq(
+    register Display *dpy,
+    register _XQEvent *prev,	/* element before qelt */
+    register _XQEvent *qelt)	/* element to be unlinked */
+{
+    if (prev) {
+	if ((prev->next = qelt->next) == NULL)
+	    dpy->tail = prev;
+    } else {
+	/* no prev, so removing first elt */
+	if ((dpy->head = qelt->next) == NULL)
+	    dpy->tail = NULL;
+    }
+    qelt->qserial_num = 0;
+    qelt->next = dpy->qfree;
+    dpy->qfree = qelt;
+    dpy->qlen--;
+
+    if (_XIsEventCookie(dpy, &qelt->event)) {
+	XGenericEventCookie* cookie = &qelt->event.xcookie;
+	/* dpy->qfree is re-used, reset memory to avoid double free on
+	 * _XFreeDisplayStructure */
+	cookie->data = NULL;
+    }
+}
+
+/*
+ * EventToWire in separate file in that often not needed.
+ */
+
+/*ARGSUSED*/
+Bool
+_XUnknownWireEvent(
+    register Display *dpy,	/* pointer to display structure */
+    register XEvent *re,	/* pointer to where event should be reformatted */
+    register xEvent *event)	/* wire protocol event */
+{
+#ifdef notdef
+	(void) fprintf(stderr,
+	    "Xlib: unhandled wire event! event number = %d, display = %x\n.",
+			event->u.u.type, dpy);
+#endif
+	return(False);
+}
+
+Bool
+_XUnknownWireEventCookie(
+    Display *dpy,	/* pointer to display structure */
+    XGenericEventCookie *re,	/* pointer to where event should be reformatted */
+    xEvent *event)	/* wire protocol event */
+{
+#ifdef notdef
+	fprintf(stderr,
+	    "Xlib: unhandled wire cookie event! extension number = %d, display = %x\n.",
+			((xGenericEvent*)event)->extension, dpy);
+#endif
+	return(False);
+}
+
+Bool
+_XUnknownCopyEventCookie(
+    Display *dpy,	/* pointer to display structure */
+    XGenericEventCookie *in,	/* source */
+    XGenericEventCookie *out)	/* destination */
+{
+#ifdef notdef
+	fprintf(stderr,
+	    "Xlib: unhandled cookie event copy! extension number = %d, display = %x\n.",
+			in->extension, dpy);
+#endif
+	return(False);
+}
+
+/*ARGSUSED*/
+Status
+_XUnknownNativeEvent(
+    register Display *dpy,	/* pointer to display structure */
+    register XEvent *re,	/* pointer to where event should be reformatted */
+    register xEvent *event)	/* wire protocol event */
+{
+#ifdef notdef
+	(void) fprintf(stderr,
+ 	   "Xlib: unhandled native event! event number = %d, display = %x\n.",
+			re->type, dpy);
+#endif
+	return(0);
+}
+/*
+ * reformat a wire event into an XEvent structure of the right type.
+ */
+Bool
+_XWireToEvent(
+    register Display *dpy,	/* pointer to display structure */
+    register XEvent *re,	/* pointer to where event should be reformatted */
+    register xEvent *event)	/* wire protocol event */
+{
+
+	re->type = event->u.u.type & 0x7f;
+	((XAnyEvent *)re)->serial = _XSetLastRequestRead(dpy,
+					(xGenericReply *)event);
+	((XAnyEvent *)re)->send_event = ((event->u.u.type & 0x80) != 0);
+	((XAnyEvent *)re)->display = dpy;
+
+	/* Ignore the leading bit of the event type since it is set when a
+		client sends an event rather than the server. */
+
+	switch (event-> u.u.type & 0177) {
+	      case KeyPress:
+	      case KeyRelease:
+	        {
+			register XKeyEvent *ev = (XKeyEvent*) re;
+			ev->root 	= event->u.keyButtonPointer.root;
+			ev->window 	= event->u.keyButtonPointer.event;
+			ev->subwindow 	= event->u.keyButtonPointer.child;
+			ev->time 	= event->u.keyButtonPointer.time;
+			ev->x 		= cvtINT16toInt(event->u.keyButtonPointer.eventX);
+			ev->y 		= cvtINT16toInt(event->u.keyButtonPointer.eventY);
+			ev->x_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootX);
+			ev->y_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootY);
+			ev->state	= event->u.keyButtonPointer.state;
+			ev->same_screen	= event->u.keyButtonPointer.sameScreen;
+			ev->keycode 	= event->u.u.detail;
+		}
+	      	break;
+	      case ButtonPress:
+	      case ButtonRelease:
+	        {
+			register XButtonEvent *ev =  (XButtonEvent *) re;
+			ev->root 	= event->u.keyButtonPointer.root;
+			ev->window 	= event->u.keyButtonPointer.event;
+			ev->subwindow 	= event->u.keyButtonPointer.child;
+			ev->time 	= event->u.keyButtonPointer.time;
+			ev->x 		= cvtINT16toInt(event->u.keyButtonPointer.eventX);
+			ev->y 		= cvtINT16toInt(event->u.keyButtonPointer.eventY);
+			ev->x_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootX);
+			ev->y_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootY);
+			ev->state	= event->u.keyButtonPointer.state;
+			ev->same_screen	= event->u.keyButtonPointer.sameScreen;
+			ev->button 	= event->u.u.detail;
+		}
+	        break;
+	      case MotionNotify:
+	        {
+			register XMotionEvent *ev =   (XMotionEvent *)re;
+			ev->root 	= event->u.keyButtonPointer.root;
+			ev->window 	= event->u.keyButtonPointer.event;
+			ev->subwindow 	= event->u.keyButtonPointer.child;
+			ev->time 	= event->u.keyButtonPointer.time;
+			ev->x 		= cvtINT16toInt(event->u.keyButtonPointer.eventX);
+			ev->y 		= cvtINT16toInt(event->u.keyButtonPointer.eventY);
+			ev->x_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootX);
+			ev->y_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootY);
+			ev->state	= event->u.keyButtonPointer.state;
+			ev->same_screen	= event->u.keyButtonPointer.sameScreen;
+			ev->is_hint 	= event->u.u.detail;
+		}
+	        break;
+	      case EnterNotify:
+	      case LeaveNotify:
+		{
+			register XCrossingEvent *ev   = (XCrossingEvent *) re;
+			ev->root	= event->u.enterLeave.root;
+			ev->window	= event->u.enterLeave.event;
+			ev->subwindow	= event->u.enterLeave.child;
+			ev->time	= event->u.enterLeave.time;
+			ev->x		= cvtINT16toInt(event->u.enterLeave.eventX);
+			ev->y		= cvtINT16toInt(event->u.enterLeave.eventY);
+			ev->x_root	= cvtINT16toInt(event->u.enterLeave.rootX);
+			ev->y_root	= cvtINT16toInt(event->u.enterLeave.rootY);
+			ev->state	= event->u.enterLeave.state;
+			ev->mode	= event->u.enterLeave.mode;
+			ev->same_screen = (event->u.enterLeave.flags &
+				ELFlagSameScreen) && True;
+			ev->focus	= (event->u.enterLeave.flags &
+			  	ELFlagFocus) && True;
+			ev->detail	= event->u.u.detail;
+		}
+		  break;
+	      case FocusIn:
+	      case FocusOut:
+		{
+			register XFocusChangeEvent *ev = (XFocusChangeEvent *) re;
+			ev->window 	= event->u.focus.window;
+			ev->mode	= event->u.focus.mode;
+			ev->detail	= event->u.u.detail;
+		}
+		  break;
+	      case KeymapNotify:
+		{
+			register XKeymapEvent *ev = (XKeymapEvent *) re;
+			ev->window	= None;
+			memcpy(&ev->key_vector[1],
+			       (char *)((xKeymapEvent *) event)->map,
+			       sizeof (((xKeymapEvent *) event)->map));
+		}
+		break;
+	      case Expose:
+		{
+			register XExposeEvent *ev = (XExposeEvent *) re;
+			ev->window	= event->u.expose.window;
+			ev->x		= event->u.expose.x;
+			ev->y		= event->u.expose.y;
+			ev->width	= event->u.expose.width;
+			ev->height	= event->u.expose.height;
+			ev->count	= event->u.expose.count;
+		}
+		break;
+	      case GraphicsExpose:
+		{
+		    register XGraphicsExposeEvent *ev =
+			(XGraphicsExposeEvent *) re;
+		    ev->drawable	= event->u.graphicsExposure.drawable;
+		    ev->x		= event->u.graphicsExposure.x;
+		    ev->y		= event->u.graphicsExposure.y;
+		    ev->width		= event->u.graphicsExposure.width;
+		    ev->height		= event->u.graphicsExposure.height;
+		    ev->count		= event->u.graphicsExposure.count;
+		    ev->major_code	= event->u.graphicsExposure.majorEvent;
+		    ev->minor_code	= event->u.graphicsExposure.minorEvent;
+		}
+		break;
+	      case NoExpose:
+		{
+		    register XNoExposeEvent *ev = (XNoExposeEvent *) re;
+		    ev->drawable	= event->u.noExposure.drawable;
+		    ev->major_code	= event->u.noExposure.majorEvent;
+		    ev->minor_code	= event->u.noExposure.minorEvent;
+		}
+		break;
+	      case VisibilityNotify:
+		{
+		    register XVisibilityEvent *ev = (XVisibilityEvent *) re;
+		    ev->window		= event->u.visibility.window;
+		    ev->state		= event->u.visibility.state;
+		}
+		break;
+	      case CreateNotify:
+		{
+		    register XCreateWindowEvent *ev =
+			 (XCreateWindowEvent *) re;
+		    ev->window		= event->u.createNotify.window;
+		    ev->parent		= event->u.createNotify.parent;
+		    ev->x		= cvtINT16toInt(event->u.createNotify.x);
+		    ev->y		= cvtINT16toInt(event->u.createNotify.y);
+		    ev->width		= event->u.createNotify.width;
+		    ev->height		= event->u.createNotify.height;
+		    ev->border_width	= event->u.createNotify.borderWidth;
+		    ev->override_redirect	= event->u.createNotify.override;
+		}
+		break;
+	      case DestroyNotify:
+		{
+		    register XDestroyWindowEvent *ev =
+				(XDestroyWindowEvent *) re;
+		    ev->window		= event->u.destroyNotify.window;
+		    ev->event		= event->u.destroyNotify.event;
+		}
+		break;
+	      case UnmapNotify:
+		{
+		    register XUnmapEvent *ev = (XUnmapEvent *) re;
+		    ev->window		= event->u.unmapNotify.window;
+		    ev->event		= event->u.unmapNotify.event;
+		    ev->from_configure	= event->u.unmapNotify.fromConfigure;
+		}
+		break;
+	      case MapNotify:
+		{
+		    register XMapEvent *ev = (XMapEvent *) re;
+		    ev->window		= event->u.mapNotify.window;
+		    ev->event		= event->u.mapNotify.event;
+		    ev->override_redirect	= event->u.mapNotify.override;
+		}
+		break;
+	      case MapRequest:
+		{
+		    register XMapRequestEvent *ev = (XMapRequestEvent *) re;
+		    ev->window		= event->u.mapRequest.window;
+		    ev->parent		= event->u.mapRequest.parent;
+		}
+		break;
+	      case ReparentNotify:
+		{
+		    register XReparentEvent *ev = (XReparentEvent *) re;
+		    ev->event		= event->u.reparent.event;
+		    ev->window		= event->u.reparent.window;
+		    ev->parent		= event->u.reparent.parent;
+		    ev->x		= cvtINT16toInt(event->u.reparent.x);
+		    ev->y		= cvtINT16toInt(event->u.reparent.y);
+		    ev->override_redirect	= event->u.reparent.override;
+		}
+		break;
+	      case ConfigureNotify:
+		{
+		    register XConfigureEvent *ev = (XConfigureEvent *) re;
+		    ev->event	= event->u.configureNotify.event;
+		    ev->window	= event->u.configureNotify.window;
+		    ev->above	= event->u.configureNotify.aboveSibling;
+		    ev->x	= cvtINT16toInt(event->u.configureNotify.x);
+		    ev->y	= cvtINT16toInt(event->u.configureNotify.y);
+		    ev->width	= event->u.configureNotify.width;
+		    ev->height	= event->u.configureNotify.height;
+		    ev->border_width  = event->u.configureNotify.borderWidth;
+		    ev->override_redirect = event->u.configureNotify.override;
+		}
+		break;
+	      case ConfigureRequest:
+		{
+		    register XConfigureRequestEvent *ev =
+		        (XConfigureRequestEvent *) re;
+		    ev->window		= event->u.configureRequest.window;
+		    ev->parent		= event->u.configureRequest.parent;
+		    ev->above		= event->u.configureRequest.sibling;
+		    ev->x		= cvtINT16toInt(event->u.configureRequest.x);
+		    ev->y		= cvtINT16toInt(event->u.configureRequest.y);
+		    ev->width		= event->u.configureRequest.width;
+		    ev->height		= event->u.configureRequest.height;
+		    ev->border_width	= event->u.configureRequest.borderWidth;
+		    ev->value_mask	= event->u.configureRequest.valueMask;
+		    ev->detail  	= event->u.u.detail;
+		}
+		break;
+	      case GravityNotify:
+		{
+		    register XGravityEvent *ev = (XGravityEvent *) re;
+		    ev->window		= event->u.gravity.window;
+		    ev->event		= event->u.gravity.event;
+		    ev->x		= cvtINT16toInt(event->u.gravity.x);
+		    ev->y		= cvtINT16toInt(event->u.gravity.y);
+		}
+		break;
+	      case ResizeRequest:
+		{
+		    register XResizeRequestEvent *ev =
+			(XResizeRequestEvent *) re;
+		    ev->window		= event->u.resizeRequest.window;
+		    ev->width		= event->u.resizeRequest.width;
+		    ev->height		= event->u.resizeRequest.height;
+		}
+		break;
+	      case CirculateNotify:
+		{
+		    register XCirculateEvent *ev = (XCirculateEvent *) re;
+		    ev->window		= event->u.circulate.window;
+		    ev->event		= event->u.circulate.event;
+		    ev->place		= event->u.circulate.place;
+		}
+		break;
+	      case CirculateRequest:
+		{
+		    register XCirculateRequestEvent *ev =
+		        (XCirculateRequestEvent *) re;
+		    ev->window		= event->u.circulate.window;
+		    ev->parent		= event->u.circulate.event;
+		    ev->place		= event->u.circulate.place;
+		}
+		break;
+	      case PropertyNotify:
+		{
+		    register XPropertyEvent *ev = (XPropertyEvent *) re;
+		    ev->window		= event->u.property.window;
+		    ev->atom		= event->u.property.atom;
+		    ev->time		= event->u.property.time;
+		    ev->state		= event->u.property.state;
+		}
+		break;
+	      case SelectionClear:
+		{
+		    register XSelectionClearEvent *ev =
+			 (XSelectionClearEvent *) re;
+		    ev->window		= event->u.selectionClear.window;
+		    ev->selection	= event->u.selectionClear.atom;
+		    ev->time		= event->u.selectionClear.time;
+		}
+		break;
+	      case SelectionRequest:
+		{
+		    register XSelectionRequestEvent *ev =
+		        (XSelectionRequestEvent *) re;
+		    ev->owner		= event->u.selectionRequest.owner;
+		    ev->requestor	= event->u.selectionRequest.requestor;
+		    ev->selection	= event->u.selectionRequest.selection;
+		    ev->target		= event->u.selectionRequest.target;
+		    ev->property	= event->u.selectionRequest.property;
+		    ev->time		= event->u.selectionRequest.time;
+		}
+		break;
+	      case SelectionNotify:
+		{
+		    register XSelectionEvent *ev = (XSelectionEvent *) re;
+		    ev->requestor	= event->u.selectionNotify.requestor;
+		    ev->selection	= event->u.selectionNotify.selection;
+		    ev->target		= event->u.selectionNotify.target;
+		    ev->property	= event->u.selectionNotify.property;
+		    ev->time		= event->u.selectionNotify.time;
+		}
+		break;
+	      case ColormapNotify:
+		{
+		    register XColormapEvent *ev = (XColormapEvent *) re;
+		    ev->window		= event->u.colormap.window;
+		    ev->colormap	= event->u.colormap.colormap;
+		    ev->new		= event->u.colormap.new;
+		    ev->state		= event->u.colormap.state;
+	        }
+		break;
+	      case ClientMessage:
+		{
+		   register int i;
+		   register XClientMessageEvent *ev
+		   			= (XClientMessageEvent *) re;
+		   ev->window		= event->u.clientMessage.window;
+		   ev->format		= event->u.u.detail;
+		   switch (ev->format) {
+			case 8:
+			   ev->message_type = event->u.clientMessage.u.b.type;
+			   for (i = 0; i < 20; i++)
+			     ev->data.b[i] = event->u.clientMessage.u.b.bytes[i];
+			   break;
+			case 16:
+			   ev->message_type = event->u.clientMessage.u.s.type;
+			   ev->data.s[0] = cvtINT16toShort(event->u.clientMessage.u.s.shorts0);
+			   ev->data.s[1] = cvtINT16toShort(event->u.clientMessage.u.s.shorts1);
+			   ev->data.s[2] = cvtINT16toShort(event->u.clientMessage.u.s.shorts2);
+			   ev->data.s[3] = cvtINT16toShort(event->u.clientMessage.u.s.shorts3);
+			   ev->data.s[4] = cvtINT16toShort(event->u.clientMessage.u.s.shorts4);
+			   ev->data.s[5] = cvtINT16toShort(event->u.clientMessage.u.s.shorts5);
+			   ev->data.s[6] = cvtINT16toShort(event->u.clientMessage.u.s.shorts6);
+			   ev->data.s[7] = cvtINT16toShort(event->u.clientMessage.u.s.shorts7);
+			   ev->data.s[8] = cvtINT16toShort(event->u.clientMessage.u.s.shorts8);
+			   ev->data.s[9] = cvtINT16toShort(event->u.clientMessage.u.s.shorts9);
+			   break;
+			case 32:
+			   ev->message_type = event->u.clientMessage.u.l.type;
+			   ev->data.l[0] = cvtINT32toLong(event->u.clientMessage.u.l.longs0);
+			   ev->data.l[1] = cvtINT32toLong(event->u.clientMessage.u.l.longs1);
+			   ev->data.l[2] = cvtINT32toLong(event->u.clientMessage.u.l.longs2);
+			   ev->data.l[3] = cvtINT32toLong(event->u.clientMessage.u.l.longs3);
+			   ev->data.l[4] = cvtINT32toLong(event->u.clientMessage.u.l.longs4);
+			   break;
+			default: /* XXX should never occur */
+				break;
+		    }
+	        }
+		break;
+	      case MappingNotify:
+		{
+		   register XMappingEvent *ev = (XMappingEvent *)re;
+		   ev->window		= 0;
+		   ev->first_keycode 	= event->u.mappingNotify.firstKeyCode;
+		   ev->request 		= event->u.mappingNotify.request;
+		   ev->count 		= event->u.mappingNotify.count;
+		}
+		break;
+	      default:
+		return(_XUnknownWireEvent(dpy, re, event));
+	}
+	return(True);
+}
+
+
+/*
+ * _XDefaultIOError - Default fatal system error reporting routine.  Called
+ * when an X internal system error is encountered.
+ */
+int _XDefaultIOError(
+	Display *dpy)
+{
+	if (ECHECK(EPIPE)) {
+	    (void) fprintf (stderr,
+	"X connection to %s broken (explicit kill or server shutdown).\r\n",
+			    DisplayString (dpy));
+	} else {
+	    (void) fprintf (stderr,
+			"XIO:  fatal IO error %d (%s) on X server \"%s\"\r\n",
+#ifdef WIN32
+			WSAGetLastError(), strerror(WSAGetLastError()),
+#else
+			errno, strerror (errno),
+#endif
+			DisplayString (dpy));
+	    (void) fprintf (stderr,
+	 "      after %lu requests (%lu known processed) with %d events remaining.\r\n",
+			NextRequest(dpy) - 1, LastKnownRequestProcessed(dpy),
+			QLength(dpy));
+
+	}
+	exit(1);
+        return(0); /* dummy - function should never return */
+}
+
+
+static int _XPrintDefaultError(
+    Display *dpy,
+    XErrorEvent *event,
+    FILE *fp)
+{
+    char buffer[BUFSIZ];
+    char mesg[BUFSIZ];
+    char number[32];
+    const char *mtype = "XlibMessage";
+    register _XExtension *ext = (_XExtension *)NULL;
+    _XExtension *bext = (_XExtension *)NULL;
+    XGetErrorText(dpy, event->error_code, buffer, BUFSIZ);
+    XGetErrorDatabaseText(dpy, mtype, "XError", "X Error", mesg, BUFSIZ);
+    (void) fprintf(fp, "%s:  %s\n  ", mesg, buffer);
+    XGetErrorDatabaseText(dpy, mtype, "MajorCode", "Request Major code %d",
+	mesg, BUFSIZ);
+    (void) fprintf(fp, mesg, event->request_code);
+    if (event->request_code < 128) {
+	sprintf(number, "%d", event->request_code);
+	XGetErrorDatabaseText(dpy, "XRequest", number, "", buffer, BUFSIZ);
+    } else {
+	for (ext = dpy->ext_procs;
+	     ext && (ext->codes.major_opcode != event->request_code);
+	     ext = ext->next)
+	  ;
+	if (ext)
+	    strcpy(buffer, ext->name);
+	else
+	    buffer[0] = '\0';
+    }
+    (void) fprintf(fp, " (%s)\n", buffer);
+    if (event->request_code >= 128) {
+	XGetErrorDatabaseText(dpy, mtype, "MinorCode", "Request Minor code %d",
+			      mesg, BUFSIZ);
+	fputs("  ", fp);
+	(void) fprintf(fp, mesg, event->minor_code);
+	if (ext) {
+	    sprintf(mesg, "%s.%d", ext->name, event->minor_code);
+	    XGetErrorDatabaseText(dpy, "XRequest", mesg, "", buffer, BUFSIZ);
+	    (void) fprintf(fp, " (%s)", buffer);
+	}
+	fputs("\n", fp);
+    }
+    if (event->error_code >= 128) {
+	/* kludge, try to find the extension that caused it */
+	buffer[0] = '\0';
+	for (ext = dpy->ext_procs; ext; ext = ext->next) {
+	    if (ext->error_string)
+		(*ext->error_string)(dpy, event->error_code, &ext->codes,
+				     buffer, BUFSIZ);
+	    if (buffer[0]) {
+		bext = ext;
+		break;
+	    }
+	    if (ext->codes.first_error &&
+		ext->codes.first_error < (int)event->error_code &&
+		(!bext || ext->codes.first_error > bext->codes.first_error))
+		bext = ext;
+	}
+	if (bext)
+	    sprintf(buffer, "%s.%d", bext->name,
+		    event->error_code - bext->codes.first_error);
+	else
+	    strcpy(buffer, "Value");
+	XGetErrorDatabaseText(dpy, mtype, buffer, "", mesg, BUFSIZ);
+	if (mesg[0]) {
+	    fputs("  ", fp);
+	    (void) fprintf(fp, mesg, event->resourceid);
+	    fputs("\n", fp);
+	}
+	/* let extensions try to print the values */
+	for (ext = dpy->ext_procs; ext; ext = ext->next) {
+	    if (ext->error_values)
+		(*ext->error_values)(dpy, event, fp);
+	}
+    } else if ((event->error_code == BadWindow) ||
+	       (event->error_code == BadPixmap) ||
+	       (event->error_code == BadCursor) ||
+	       (event->error_code == BadFont) ||
+	       (event->error_code == BadDrawable) ||
+	       (event->error_code == BadColor) ||
+	       (event->error_code == BadGC) ||
+	       (event->error_code == BadIDChoice) ||
+	       (event->error_code == BadValue) ||
+	       (event->error_code == BadAtom)) {
+	if (event->error_code == BadValue)
+	    XGetErrorDatabaseText(dpy, mtype, "Value", "Value 0x%x",
+				  mesg, BUFSIZ);
+	else if (event->error_code == BadAtom)
+	    XGetErrorDatabaseText(dpy, mtype, "AtomID", "AtomID 0x%x",
+				  mesg, BUFSIZ);
+	else
+	    XGetErrorDatabaseText(dpy, mtype, "ResourceID", "ResourceID 0x%x",
+				  mesg, BUFSIZ);
+	fputs("  ", fp);
+	(void) fprintf(fp, mesg, event->resourceid);
+	fputs("\n", fp);
+    }
+    XGetErrorDatabaseText(dpy, mtype, "ErrorSerial", "Error Serial #%d",
+			  mesg, BUFSIZ);
+    fputs("  ", fp);
+    (void) fprintf(fp, mesg, event->serial);
+    XGetErrorDatabaseText(dpy, mtype, "CurrentSerial", "Current Serial #%d",
+			  mesg, BUFSIZ);
+    fputs("\n  ", fp);
+    (void) fprintf(fp, mesg, dpy->request);
+    fputs("\n", fp);
+    if (event->error_code == BadImplementation) return 0;
+    return 1;
+}
+
+int _XDefaultError(
+	Display *dpy,
+	XErrorEvent *event)
+{
+    if (_XPrintDefaultError (dpy, event, stderr) == 0) return 0;
+    exit(1);
+    /*NOTREACHED*/
+}
+
+/*ARGSUSED*/
+Bool _XDefaultWireError(Display *display, XErrorEvent *he, xError *we)
+{
+    return True;
+}
+
+/*
+ * _XError - upcall internal or user protocol error handler
+ */
+int _XError (
+    Display *dpy,
+    register xError *rep)
+{
+    /*
+     * X_Error packet encountered!  We need to unpack the error before
+     * giving it to the user.
+     */
+    XEvent event; /* make it a large event */
+    register _XAsyncHandler *async, *next;
+
+    event.xerror.serial = _XSetLastRequestRead(dpy, (xGenericReply *)rep);
+
+    for (async = dpy->async_handlers; async; async = next) {
+	next = async->next;
+	if ((*async->handler)(dpy, (xReply *)rep,
+			      (char *)rep, SIZEOF(xError), async->data))
+	    return 0;
+    }
+
+    event.xerror.display = dpy;
+    event.xerror.type = X_Error;
+    event.xerror.resourceid = rep->resourceID;
+    event.xerror.error_code = rep->errorCode;
+    event.xerror.request_code = rep->majorCode;
+    event.xerror.minor_code = rep->minorCode;
+    if (dpy->error_vec &&
+	!(*dpy->error_vec[rep->errorCode])(dpy, &event.xerror, rep))
+	return 0;
+    if (_XErrorFunction != NULL) {
+	return (*_XErrorFunction)(dpy, (XErrorEvent *)&event); /* upcall */
+    } else {
+	return _XDefaultError(dpy, (XErrorEvent *)&event);
+    }
+}
+
+/*
+ * _XIOError - call user connection error handler and exit
+ */
+int
+_XIOError (
+    Display *dpy)
+{
+    dpy->flags |= XlibDisplayIOError;
+#ifdef WIN32
+    errno = WSAGetLastError();
+#endif
+
+    /* This assumes that the thread calling exit will call any atexit handlers.
+     * If this does not hold, then an alternate solution would involve
+     * registering an atexit handler to take over the lock, which would only
+     * assume that the same thread calls all the atexit handlers. */
+#ifdef XTHREADS
+    if (dpy->lock)
+	(*dpy->lock->user_lock_display)(dpy);
+#endif
+    UnlockDisplay(dpy);
+
+    if (_XIOErrorFunction != NULL)
+	(*_XIOErrorFunction)(dpy);
+    else
+	_XDefaultIOError(dpy);
+    exit (1);
+    return 0;
+}
+
+
+/*
+ * This routine can be used to (cheaply) get some memory within a single
+ * Xlib routine for scratch space.  A single buffer is reused each time
+ * if possible.  To be MT safe, you can only call this between a call to
+ * GetReq* and a call to Data* or _XSend*, or in a context when the thread
+ * is guaranteed to not unlock the display.
+ */
+char *_XAllocScratch(
+	register Display *dpy,
+	unsigned long nbytes)
+{
+	if (nbytes > dpy->scratch_length) {
+	    if (dpy->scratch_buffer) Xfree (dpy->scratch_buffer);
+	    if ((dpy->scratch_buffer = Xmalloc((unsigned) nbytes)))
+		dpy->scratch_length = nbytes;
+	    else dpy->scratch_length = 0;
+	}
+	return (dpy->scratch_buffer);
+}
+
+/*
+ * Scratch space allocator you can call any time, multiple times, and be
+ * MT safe, but you must hand the buffer back with _XFreeTemp.
+ */
+char *_XAllocTemp(
+    register Display *dpy,
+    unsigned long nbytes)
+{
+    char *buf;
+
+    buf = _XAllocScratch(dpy, nbytes);
+    dpy->scratch_buffer = NULL;
+    dpy->scratch_length = 0;
+    return buf;
+}
+
+void _XFreeTemp(
+    register Display *dpy,
+    char *buf,
+    unsigned long nbytes)
+{
+    if (dpy->scratch_buffer)
+	Xfree(dpy->scratch_buffer);
+    dpy->scratch_buffer = buf;
+    dpy->scratch_length = nbytes;
+}
+
+/*
+ * Given a visual id, find the visual structure for this id on this display.
+ */
+Visual *_XVIDtoVisual(
+	Display *dpy,
+	VisualID id)
+{
+	register int i, j, k;
+	register Screen *sp;
+	register Depth *dp;
+	register Visual *vp;
+	for (i = 0; i < dpy->nscreens; i++) {
+		sp = &dpy->screens[i];
+		for (j = 0; j < sp->ndepths; j++) {
+			dp = &sp->depths[j];
+			/* if nvisuals == 0 then visuals will be NULL */
+			for (k = 0; k < dp->nvisuals; k++) {
+				vp = &dp->visuals[k];
+				if (vp->visualid == id) return (vp);
+			}
+		}
+	}
+	return (NULL);
+}
+
+int
+XFree (void *data)
+{
+	Xfree (data);
+	return 1;
+}
+
+#ifdef _XNEEDBCOPYFUNC
+void _Xbcopy(b1, b2, length)
+    register char *b1, *b2;
+    register length;
+{
+    if (b1 < b2) {
+	b2 += length;
+	b1 += length;
+	while (length--)
+	    *--b2 = *--b1;
+    } else {
+	while (length--)
+	    *b2++ = *b1++;
+    }
+}
+#endif
+
+#ifdef DataRoutineIsProcedure
+void Data(
+	Display *dpy,
+	char *data,
+	long len)
+{
+	if (dpy->bufptr + (len) <= dpy->bufmax) {
+		memcpy(dpy->bufptr, data, (int)len);
+		dpy->bufptr += ((len) + 3) & ~3;
+	} else {
+		_XSend(dpy, data, len);
+	}
+}
+#endif /* DataRoutineIsProcedure */
+
+
+#ifdef LONG64
+int
+_XData32(
+    Display *dpy,
+    register long *data,
+    unsigned len)
+{
+    register int *buf;
+    register long i;
+
+    while (len) {
+	buf = (int *)dpy->bufptr;
+	i = dpy->bufmax - (char *)buf;
+	if (!i) {
+	    _XFlush(dpy);
+	    continue;
+	}
+	if (len < i)
+	    i = len;
+	dpy->bufptr = (char *)buf + i;
+	len -= i;
+	i >>= 2;
+	while (--i >= 0)
+	    *buf++ = *data++;
+    }
+    return 0;
+}
+#endif /* LONG64 */
+
+#ifdef WORD64
+
+/*
+ * XXX This is a *really* stupid way of doing this.  It should just use
+ * dpy->bufptr directly, taking into account where in the word it is.
+ */
+
+/*
+ * Data16 - Place 16 bit data in the buffer.
+ *
+ * "dpy" is a pointer to a Display.
+ * "data" is a pointer to the data.
+ * "len" is the length in bytes of the data.
+ */
+
+static doData16(
+    register Display *dpy,
+    short *data,
+    unsigned len,
+    char *packbuffer)
+{
+    long *lp,*lpack;
+    long i, nwords,bits;
+    long mask16 = 0x000000000000ffff;
+
+        lp = (long *)data;
+        lpack = (long *)packbuffer;
+
+/*  nwords is the number of 16 bit values to be packed,
+ *  the low order 16 bits of each word will be packed
+ *  into 64 bit words
+ */
+        nwords = len >> 1;
+        bits = 48;
+
+        for(i=0;i<nwords;i++){
+	   if (bits == 48) *lpack = 0;
+           *lpack ^= (*lp & mask16) << bits;
+           bits -= 16 ;
+           lp++;
+           if(bits < 0){
+               lpack++;
+               bits = 48;
+           }
+        }
+        Data(dpy, packbuffer, len);
+}
+
+_XData16 (
+    Display *dpy,
+    short *data,
+    unsigned len)
+{
+    char packbuffer[PACKBUFFERSIZE];
+    unsigned nunits = PACKBUFFERSIZE >> 1;
+
+    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {
+	doData16 (dpy, data, PACKBUFFERSIZE, packbuffer);
+    }
+    if (len) doData16 (dpy, data, len, packbuffer);
+}
+
+/*
+ * Data32 - Place 32 bit data in the buffer.
+ *
+ * "dpy" is a pointer to a Display.
+ * "data" is a pointer to the data.
+ * "len" is the length in bytes of the data.
+ */
+
+static doData32(
+    register Display *dpy
+    long *data,
+    unsigned len,
+    char *packbuffer)
+{
+    long *lp,*lpack;
+    long i,bits,nwords;
+    long mask32 = 0x00000000ffffffff;
+
+        lpack = (long *) packbuffer;
+        lp = data;
+
+/*  nwords is the number of 32 bit values to be packed
+ *  the low order 32 bits of each word will be packed
+ *  into 64 bit words
+ */
+        nwords = len >> 2;
+        bits = 32;
+
+        for(i=0;i<nwords;i++){
+	   if (bits == 32) *lpack = 0;
+           *lpack ^= (*lp & mask32) << bits;
+           bits = bits ^32;
+           lp++;
+           if(bits)
+              lpack++;
+        }
+        Data(dpy, packbuffer, len);
+}
+
+void _XData32(
+    Display *dpy,
+    long *data,
+    unsigned len)
+{
+    char packbuffer[PACKBUFFERSIZE];
+    unsigned nunits = PACKBUFFERSIZE >> 2;
+
+    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {
+	doData32 (dpy, data, PACKBUFFERSIZE, packbuffer);
+    }
+    if (len) doData32 (dpy, data, len, packbuffer);
+}
+
+#endif /* WORD64 */
+
+
+/* Make sure this produces the same string as DefineLocal/DefineSelf in xdm.
+ * Otherwise, Xau will not be able to find your cookies in the Xauthority file.
+ *
+ * Note: POSIX says that the ``nodename'' member of utsname does _not_ have
+ *       to have sufficient information for interfacing to the network,
+ *       and so, you may be better off using gethostname (if it exists).
+ */
+
+#if (defined(_POSIX_SOURCE) && !defined(AIXV3) && !defined(__QNX__)) || defined(hpux) || defined(SVR4)
+#define NEED_UTSNAME
+#include <sys/utsname.h>
+#else
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#endif
+
+/*
+ * _XGetHostname - similar to gethostname but allows special processing.
+ */
+int _XGetHostname (
+    char *buf,
+    int maxlen)
+{
+    int len;
+
+#ifdef NEED_UTSNAME
+    struct utsname name;
+
+    if (maxlen <= 0 || buf == NULL)
+	return 0;
+
+    uname (&name);
+    len = strlen (name.nodename);
+    if (len >= maxlen) len = maxlen - 1;
+    strncpy (buf, name.nodename, len);
+    buf[len] = '\0';
+#else
+    if (maxlen <= 0 || buf == NULL)
+	return 0;
+
+    buf[0] = '\0';
+    (void) gethostname (buf, maxlen);
+    buf [maxlen - 1] = '\0';
+    len = strlen(buf);
+#endif /* NEED_UTSNAME */
+    return len;
+}
+
+
+/*
+ * _XScreenOfWindow - get the Screen of a given window
+ */
+
+Screen *_XScreenOfWindow(Display *dpy, Window w)
+{
+    register int i;
+    Window root;
+    int x, y;				/* dummy variables */
+    unsigned int width, height, bw, depth;  /* dummy variables */
+
+    if (XGetGeometry (dpy, w, &root, &x, &y, &width, &height,
+		      &bw, &depth) == False) {
+	return NULL;
+    }
+    for (i = 0; i < ScreenCount (dpy); i++) {	/* find root from list */
+	if (root == RootWindow (dpy, i)) {
+	    return ScreenOfDisplay (dpy, i);
+	}
+    }
+    return NULL;
+}
+
+
+#if defined(WIN32)
+
+/*
+ * These functions are intended to be used internally to Xlib only.
+ * These functions will always prefix the path with a DOS drive in the
+ * form "<drive-letter>:". As such, these functions are only suitable
+ * for use by Xlib function that supply a root-based path to some
+ * particular file, e.g. <ProjectRoot>/lib/X11/locale/locale.dir will
+ * be converted to "C:/usr/X11R6.3/lib/X11/locale/locale.dir".
+ */
+
+static int access_file (path, pathbuf, len_pathbuf, pathret)
+    char* path;
+    char* pathbuf;
+    int len_pathbuf;
+    char** pathret;
+{
+    if (access (path, F_OK) == 0) {
+	if (strlen (path) < len_pathbuf)
+	    *pathret = pathbuf;
+	else
+	    *pathret = Xmalloc (strlen (path) + 1);
+	if (*pathret) {
+	    strcpy (*pathret, path);
+	    return 1;
+	}
+    }
+    return 0;
+}
+
+static int AccessFile (path, pathbuf, len_pathbuf, pathret)
+    char* path;
+    char* pathbuf;
+    int len_pathbuf;
+    char** pathret;
+{
+    unsigned long drives;
+    int i, len;
+    char* drive;
+    char buf[MAX_PATH];
+    char* bufp;
+
+    /* just try the "raw" name first and see if it works */
+    if (access_file (path, pathbuf, len_pathbuf, pathret))
+	return 1;
+
+    /* try the places set in the environment */
+    drive = getenv ("_XBASEDRIVE");
+#ifdef __UNIXOS2__
+    if (!drive)
+	drive = getenv ("X11ROOT");
+#endif
+    if (!drive)
+	drive = "C:";
+    len = strlen (drive) + strlen (path);
+    if (len < MAX_PATH) bufp = buf;
+    else bufp = Xmalloc (len + 1);
+    strcpy (bufp, drive);
+    strcat (bufp, path);
+    if (access_file (bufp, pathbuf, len_pathbuf, pathret)) {
+	if (bufp != buf) Xfree (bufp);
+	return 1;
+    }
+
+#ifndef __UNIXOS2__
+    /* one last place to look */
+    drive = getenv ("HOMEDRIVE");
+    if (drive) {
+	len = strlen (drive) + strlen (path);
+	if (len < MAX_PATH) bufp = buf;
+	else bufp = Xmalloc (len + 1);
+	strcpy (bufp, drive);
+	strcat (bufp, path);
+	if (access_file (bufp, pathbuf, len_pathbuf, pathret)) {
+	    if (bufp != buf) Xfree (bufp);
+	    return 1;
+	}
+    }
+
+    /* tried everywhere else, go fishing */
+#define C_DRIVE ('C' - 'A')
+#define Z_DRIVE ('Z' - 'A')
+    /* does OS/2 (with or with gcc-emx) have getdrives? */
+    drives = _getdrives ();
+    for (i = C_DRIVE; i <= Z_DRIVE; i++) { /* don't check on A: or B: */
+	if ((1 << i) & drives) {
+	    len = 2 + strlen (path);
+	    if (len < MAX_PATH) bufp = buf;
+	    else bufp = Xmalloc (len + 1);
+	    *bufp = 'A' + i;
+	    *(bufp + 1) = ':';
+	    *(bufp + 2) = '\0';
+	    strcat (bufp, path);
+	    if (access_file (bufp, pathbuf, len_pathbuf, pathret)) {
+		if (bufp != buf) Xfree (bufp);
+		return 1;
+	    }
+	}
+    }
+#endif
+    return 0;
+}
+
+int _XOpenFile(path, flags)
+    _Xconst char* path;
+    int flags;
+{
+    char buf[MAX_PATH];
+    char* bufp = NULL;
+    int ret = -1;
+    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);
+
+    if (AccessFile (path, buf, MAX_PATH, &bufp))
+	ret = open (bufp, flags);
+
+    (void) SetErrorMode (olderror);
+
+    if (bufp != buf) Xfree (bufp);
+
+    return ret;
+}
+
+int _XOpenFileMode(path, flags, mode)
+    _Xconst char* path;
+    int flags;
+    mode_t mode;
+{
+    char buf[MAX_PATH];
+    char* bufp = NULL;
+    int ret = -1;
+    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);
+
+    if (AccessFile (path, buf, MAX_PATH, &bufp))
+	ret = open (bufp, flags, mode);
+
+    (void) SetErrorMode (olderror);
+
+    if (bufp != buf) Xfree (bufp);
+
+    return ret;
+}
+
+void* _XFopenFile(path, mode)
+    _Xconst char* path;
+    _Xconst char* mode;
+{
+    char buf[MAX_PATH];
+    char* bufp = NULL;
+    void* ret = NULL;
+    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);
+
+    if (AccessFile (path, buf, MAX_PATH, &bufp))
+	ret = fopen (bufp, mode);
+
+    (void) SetErrorMode (olderror);
+
+    if (bufp != buf) Xfree (bufp);
+
+    return ret;
+}
+
+int _XAccessFile(path)
+    _Xconst char* path;
+{
+    char buf[MAX_PATH];
+    char* bufp;
+    int ret = -1;
+    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);
+
+    ret = AccessFile (path, buf, MAX_PATH, &bufp);
+
+    (void) SetErrorMode (olderror);
+
+    if (bufp != buf) Xfree (bufp);
+
+    return ret;
+}
+
+#endif
+
+#ifdef WIN32
+#undef _Xdebug
+int _Xdebug = 0;
+int *_Xdebug_p = &_Xdebug;
+void (**_XCreateMutex_fn_p)(LockInfoPtr) = &_XCreateMutex_fn;
+void (**_XFreeMutex_fn_p)(LockInfoPtr) = &_XFreeMutex_fn;
+void (**_XLockMutex_fn_p)(LockInfoPtr
+#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
+    , char * /* file */
+    , int /* line */
+#endif
+        ) = &_XLockMutex_fn;
+void (**_XUnlockMutex_fn_p)(LockInfoPtr
+#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
+    , char * /* file */
+    , int /* line */
+#endif
+        ) = &_XUnlockMutex_fn;
+LockInfoPtr *_Xglobal_lock_p = &_Xglobal_lock;
+#endif