svn merge "^/branches/released" .

1 files changed, 3686 insertions, 3678 deletions

diff --git a/libX11/src/XlibInt.c b/libX11/src/XlibInt.c
index 5047e48a8..13f8702aa 100644
--- a/libX11/src/XlibInt.c
+++ b/libX11/src/XlibInt.c
@@ -1,3678 +1,3686 @@
-/*
-
-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.
- */
-#define NEED_EVENTS
-#define NEED_REPLIES
-
-#ifdef WIN32
-#define _XLIBINT_
-#include <X11\Xw32defs.h>
-#endif
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include "Xlibint.h"
-#include "Xprivate.h"
-#include <X11/Xpoll.h>
-#if !USE_XCB
-#include <X11/Xtrans/Xtrans.h>
-#include <X11/extensions/xcmiscstr.h>
-#endif /* !USE_XCB */
-#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)())
-
-#if !USE_XCB
-#define UnlockNextReplyReader(d) if ((d)->lock) \
-    (*(d)->lock->pop_reader)((d),&(d)->lock->reply_awaiters,&(d)->lock->reply_awaiters_tail)
-
-#define QueueReplyReaderLock(d) ((d)->lock ? \
-    (*(d)->lock->push_reader)(d,&(d)->lock->reply_awaiters_tail) : NULL)
-#define QueueEventReaderLock(d) ((d)->lock ? \
-    (*(d)->lock->push_reader)(d,&(d)->lock->event_awaiters_tail) : NULL)
-
-#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
-#define InternalLockDisplay(d,wskip) if ((d)->lock) \
-    (*(d)->lock->internal_lock_display)(d,wskip,__FILE__,__LINE__)
-#else
-#define InternalLockDisplay(d,wskip) if ((d)->lock) \
-    (*(d)->lock->internal_lock_display)(d,wskip)
-#endif
-#endif /* !USE_XCB */
-
-#else /* XTHREADS else */
-
-#if !USE_XCB
-#define UnlockNextReplyReader(d)
-#define UnlockNextEventReader(d)
-#define InternalLockDisplay(d,wskip)
-#endif /* !USE_XCB */
-
-#endif /* XTHREADS else */
-
-/* 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__
-#if !USE_XCB
-#define select(n,r,w,x,t) os2ClientSelect(n,r,w,x,t)
-#endif /* !USE_XCB */
-#include <limits.h>
-#define MAX_PATH _POSIX_PATH_MAX
-#endif
-
-#if !USE_XCB
-#ifdef MUSTCOPY
-
-#define STARTITERATE(tpvar,type,start,endcond) \
-  { register char *cpvar; \
-  for (cpvar = (char *) (start); endcond; ) { \
-    type dummy; memcpy ((char *) &dummy, cpvar, SIZEOF(type)); \
-    tpvar = &dummy;
-#define ITERPTR(tpvar) cpvar
-#define RESETITERPTR(tpvar,type,start) cpvar = start
-#define INCITERPTR(tpvar,type) cpvar += SIZEOF(type)
-#define ENDITERATE }}
-
-#else
-
-#define STARTITERATE(tpvar,type,start,endcond) \
-  for (tpvar = (type *) (start); endcond; )
-#define ITERPTR(tpvar) (char *)tpvar
-#define RESETITERPTR(tpvar,type,start) tpvar = (type *) (start)
-#define INCITERPTR(tpvar,type) tpvar++
-#define ENDITERATE
-
-#endif /* MUSTCOPY */
-
-typedef union {
-    xReply rep;
-    char buf[BUFSIZE];
-} _XAlignedBuffer;
-
-static char *_XAsyncReply(
-    Display *dpy,
-    register xReply *rep,
-    char *buf,
-    register int *lenp,
-    Bool discard);
-#endif /* !USE_XCB */
-
-/*
- * 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.
- */
-
-#if !USE_XCB
-static xReq _dummy_request = {
-	0, 0, 0
-};
-
-/*
- * This is an OS dependent routine which:
- * 1) returns as soon as the connection can be written on....
- * 2) if the connection can be read, must enqueue events and handle errors,
- * until the connection is writable.
- */
-static void
-_XWaitForWritable(
-    Display *dpy
-#ifdef XTHREADS
-    ,
-    xcondition_t cv		/* our reading condition variable */
-#endif
-    )
-{
-#ifdef USE_POLL
-    struct pollfd filedes;
-#else
-    fd_set r_mask;
-    fd_set w_mask;
-#endif
-    int nfound;
-
-#ifdef USE_POLL
-    filedes.fd = dpy->fd;
-    filedes.events = 0;
-#else
-    FD_ZERO(&r_mask);
-    FD_ZERO(&w_mask);
-#endif
-
-    for (;;) {
-#ifdef XTHREADS
-	/* We allow only one thread at a time to read, to minimize
-	   passing of read data between threads.
-	   Now, who is it?  If there is a non-NULL reply_awaiters and
-	   we (i.e., our cv) are not at the head of it, then whoever
-	   is at the head is the reader, and we don't read.
-	   Otherwise there is no reply_awaiters or we are at the
-	   head, having just appended ourselves.
-	   In this case, if there is a event_awaiters, then whoever
-	   is at the head of it got there before we did, and they are the
-	   reader.
-
-	   Last cases: no event_awaiters and we are at the head of
-	   reply_awaiters or reply_awaiters is NULL: we are the reader,
-	   since there is obviously no one else involved.
-
-	   XXX - what if cv is NULL and someone else comes along after
-	   us while we are waiting?
-	   */
-
-	if (!dpy->lock ||
-	    (!dpy->lock->event_awaiters &&
-	     (!dpy->lock->reply_awaiters ||
-	      dpy->lock->reply_awaiters->cv == cv)))
-#endif
-#ifdef USE_POLL
-	    filedes.events = POLLIN;
-	filedes.events |= POLLOUT;
-#else
-	FD_SET(dpy->fd, &r_mask);
-        FD_SET(dpy->fd, &w_mask);
-#endif
-
-	do {
-	    UnlockDisplay(dpy);
-#ifdef USE_POLL
-	    nfound = poll (&filedes, 1, -1);
-#else
-	    nfound = Select (dpy->fd + 1, &r_mask, &w_mask, NULL, NULL);
-#endif
-	    InternalLockDisplay(dpy, cv != NULL);
-	    if (nfound < 0 && !(ECHECK(EINTR) || ETEST()))
-		_XIOError(dpy);
-	} while (nfound <= 0);
-
-	if (
-#ifdef USE_POLL
-	    filedes.revents & POLLIN
-#else
-	    FD_ISSET(dpy->fd, &r_mask)
-#endif
-	    )
-	{
-	    _XAlignedBuffer buf;
-	    BytesReadable_t pend;
-	    register int len;
-	    register xReply *rep;
-
-	    /* find out how much data can be read */
-	    if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)
-		_XIOError(dpy);
-	    len = pend;
-
-	    /* must read at least one xEvent; if none is pending, then
-	       we'll just block waiting for it */
-	    if (len < SIZEOF(xReply)
-#ifdef XTHREADS
-		|| dpy->async_handlers
-#endif
-		)
-		len = SIZEOF(xReply);
-
-	    /* but we won't read more than the max buffer size */
-	    if (len > BUFSIZE) len = BUFSIZE;
-
-	    /* round down to an integral number of XReps */
-	    len = (len / SIZEOF(xReply)) * SIZEOF(xReply);
-
-	    (void) _XRead (dpy, buf.buf, (long) len);
-
-	    STARTITERATE(rep,xReply,buf.buf,len > 0) {
-		if (rep->generic.type == X_Reply) {
-                    int tmp = len;
-		    RESETITERPTR(rep,xReply,
-				 _XAsyncReply (dpy, rep,
-					       ITERPTR(rep), &tmp, True));
-                    len = tmp;
-		    pend = len;
-		} else {
-		    if (rep->generic.type == X_Error)
-			_XError (dpy, (xError *)rep);
-		    else	/* must be an event packet */
-			_XEnq (dpy, (xEvent *)rep);
-		    INCITERPTR(rep,xReply);
-		    len -= SIZEOF(xReply);
-		}
-	    } ENDITERATE
-#ifdef XTHREADS
-	    if (dpy->lock && dpy->lock->event_awaiters)
-		ConditionSignal(dpy, dpy->lock->event_awaiters->cv);
-#endif
-	}
-#ifdef USE_POLL
-	if (filedes.revents & (POLLOUT|POLLHUP|POLLERR))
-#else
-	if (FD_ISSET(dpy->fd, &w_mask))
-#endif
-	{
-#ifdef XTHREADS
-	    if (dpy->lock) {
-		ConditionBroadcast(dpy, dpy->lock->writers);
-	    }
-#endif
-	    return;
-	}
-    }
-}
-#endif /* !USE_XCB */
-
-
-#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
-}
-
-#if !USE_XCB
-/* returns True iff there is an event in the queue newer than serial_num */
-
-static Bool
-_XNewerQueuedEvent(
-    Display *dpy,
-    int serial_num)
-{
-    _XQEvent *qev;
-
-    if (dpy->next_event_serial_num == serial_num)
-	return False;
-
-    qev = dpy->head;
-    while (qev) {
-	if (qev->qserial_num >= serial_num) {
-	    return True;
-	}
-	qev = qev->next;
-    }
-    return False;
-}
-
-static int
-_XWaitForReadable(
-  Display *dpy)
-{
-    int result;
-    int fd = dpy->fd;
-    struct _XConnectionInfo *ilist;
-    register int saved_event_serial = 0;
-    int in_read_events = 0;
-    register Bool did_proc_conni = False;
-#ifdef USE_POLL
-    struct pollfd *filedes;
-#else
-    fd_set r_mask;
-    int highest_fd = fd;
-#endif
-
-#ifdef USE_POLL
-    if (dpy->im_fd_length + 1 > POLLFD_CACHE_SIZE
-	&& !(dpy->flags & XlibDisplayProcConni)) {
-	/* XXX - this fallback is gross */
-	int i;
-
-	filedes = (struct pollfd *)Xmalloc(dpy->im_fd_length * sizeof(struct pollfd));
-	filedes[0].fd = fd;
-	filedes[0].events = POLLIN;
-	for (ilist=dpy->im_fd_info, i=1; ilist; ilist=ilist->next, i++) {
-	    filedes[i].fd = ilist->fd;
-	    filedes[i].events = POLLIN;
-	}
-    } else {
-	filedes = (struct pollfd *)dpy->filedes;
-    }
-#else
-    FD_ZERO(&r_mask);
-#endif
-    for (;;) {
-#ifndef USE_POLL
-	FD_SET(fd, &r_mask);
-	if (!(dpy->flags & XlibDisplayProcConni))
-	    for (ilist=dpy->im_fd_info; ilist; ilist=ilist->next) {
-		FD_SET(ilist->fd, &r_mask);
-		if (ilist->fd > highest_fd)
-		    highest_fd = ilist->fd;
-	    }
-#endif
-	UnlockDisplay(dpy);
-#ifdef USE_POLL
-	result = poll(filedes,
-		      (dpy->flags & XlibDisplayProcConni) ? 1 : 1+dpy->im_fd_length,
-		      -1);
-#else
-	result = Select(highest_fd + 1, &r_mask, NULL, NULL, NULL);
-#endif
-	InternalLockDisplay(dpy, dpy->flags & XlibDisplayReply);
-	if (result == -1 && !(ECHECK(EINTR) || ETEST())) _XIOError(dpy);
-	if (result <= 0)
-	    continue;
-#ifdef USE_POLL
-	if (filedes[0].revents & (POLLIN|POLLHUP|POLLERR))
-#else
-	if (FD_ISSET(fd, &r_mask))
-#endif
-	    break;
-	if (!(dpy->flags & XlibDisplayProcConni)) {
-	    int i;
-
-	    saved_event_serial = dpy->next_event_serial_num;
-	    /* dpy flags can be clobbered by internal connection callback */
-	    in_read_events = dpy->flags & XlibDisplayReadEvents;
-	    for (ilist=dpy->im_fd_info, i=1; ilist; ilist=ilist->next, i++) {
-#ifdef USE_POLL
-		if (filedes[i].revents & POLLIN)
-#else
-		if (FD_ISSET(ilist->fd, &r_mask))
-#endif
-		{
-		    _XProcessInternalConnection(dpy, ilist);
-		    did_proc_conni = True;
-		}
-	    }
-#ifdef USE_POLL
-	    if (dpy->im_fd_length + 1 > POLLFD_CACHE_SIZE)
-		Xfree(filedes);
-#endif
-	}
-	if (did_proc_conni) {
-	    /* some internal connection callback might have done an
-	       XPutBackEvent.  We notice it here and if we needed an event,
-	       we can return all the way. */
-	    if (_XNewerQueuedEvent(dpy, saved_event_serial)
-		&& (in_read_events
-#ifdef XTHREADS
-		    || (dpy->lock && dpy->lock->event_awaiters)
-#endif
-		    ))
-		return -2;
-	    did_proc_conni = False;
-	}
-    }
-#ifdef XTHREADS
-#ifdef XTHREADS_DEBUG
-    printf("thread %x _XWaitForReadable returning\n", XThread_Self());
-#endif
-#endif
-    return 0;
-}
-#endif /* !USE_XCB */
-
-#ifdef _MSC_VER
-#undef min
-#define min __min
-#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
-int _XSeqSyncFunction(
-    register Display *dpy)
-{
-    xGetInputFocusReply rep;
-    register xReq *req;
-    int sent_sync = 0;
-
-    LockDisplay(dpy);
-    if ((dpy->request - dpy->last_request_read) >= (65535 - BUFSIZE/SIZEOF(xReq))) {
-	GetEmptyReq(GetInputFocus, req);
-	(void) _XReply (dpy, (xReply *)&rep, 0, xTrue);
-	sent_sync = 1;
-    } else if (sync_hazard(dpy))
-	_XSetPrivSyncFunction(dpy);
-    UnlockDisplay(dpy);
-    if (sent_sync)
-        SyncHandle();
-    return 0;
-}
-
-static int
-_XPrivSyncFunction (Display *dpy)
-{
-    assert(dpy->synchandler == _XPrivSyncFunction);
-    assert((dpy->flags & XlibDisplayPrivSync) != 0);
-    dpy->synchandler = dpy->savedsynchandler;
-    dpy->savedsynchandler = NULL;
-    dpy->flags &= ~XlibDisplayPrivSync;
-    _XIDHandler(dpy);
-    _XSeqSyncFunction(dpy);
-    return 0;
-}
-
-void _XSetPrivSyncFunction(Display *dpy)
-{
-    if (!(dpy->flags & XlibDisplayPrivSync)) {
-	dpy->savedsynchandler = dpy->synchandler;
-	dpy->synchandler = _XPrivSyncFunction;
-	dpy->flags |= XlibDisplayPrivSync;
-    }
-}
-
-void _XSetSeqSyncFunction(Display *dpy)
-{
-    if (sync_hazard(dpy))
-	_XSetPrivSyncFunction (dpy);
-}
-
-#if !USE_XCB
-#ifdef XTHREADS
-static void _XFlushInt(
-        register Display *dpy,
-        register xcondition_t cv);
-#endif
-
-/*
- * _XFlush - Flush the X request buffer.  If the buffer is empty, no
- * action is taken.  This routine correctly handles incremental writes.
- * This routine may have to be reworked if int < long.
- */
-void _XFlush(
-	register Display *dpy)
-{
-#ifdef XTHREADS
-    /* With multi-threading we introduce an internal routine to which
-       we can pass a condition variable to do locking correctly. */
-
-    _XFlushInt(dpy, NULL);
-}
-
-/* _XFlushInt - Internal version of _XFlush used to do multi-threaded
- * locking correctly.
- */
-
-static void _XFlushInt(
-	register Display *dpy,
-        register xcondition_t cv)
-{
-#endif /* XTHREADS*/
-	register long size, todo;
-	register int write_stat;
-	register char *bufindex;
-	_XExtension *ext;
-
-	/* This fix resets the bufptr to the front of the buffer so
-	 * additional appends to the bufptr will not corrupt memory. Since
-	 * the server is down, these appends are no-op's anyway but
-	 * callers of _XFlush() are not verifying this before they call it.
-	 */
-	if (dpy->flags & XlibDisplayIOError)
-	{
-	    dpy->bufptr = dpy->buffer;
-	    dpy->last_req = (char *)&_dummy_request;
-	    return;
-	}
-
-#ifdef XTHREADS
-	while (dpy->flags & XlibDisplayWriting) {
-	    if (dpy->lock) {
-		ConditionWait(dpy, dpy->lock->writers);
-	    } else {
-		_XWaitForWritable (dpy, cv);
-	    }
-	}
-#endif
-	size = todo = dpy->bufptr - dpy->buffer;
-	if (!size) return;
-#ifdef XTHREADS
-	dpy->flags |= XlibDisplayWriting;
-	/* make sure no one else can put in data */
-	dpy->bufptr = dpy->bufmax;
-#endif
-	for (ext = dpy->flushes; ext; ext = ext->next_flush)
-	    (*ext->before_flush)(dpy, &ext->codes, dpy->buffer, size);
-	bufindex = dpy->buffer;
-	/*
-	 * While write has not written the entire buffer, keep looping
-	 * until the entire buffer is written.  bufindex will be
-	 * incremented and size decremented as buffer is written out.
-	 */
-	while (size) {
-	    ESET(0);
-	    write_stat = _X11TransWrite(dpy->trans_conn,
-					bufindex, (int) todo);
-	    if (write_stat >= 0) {
-		size -= write_stat;
-		todo = size;
-		bufindex += write_stat;
-	    } else if (ETEST()) {
-		_XWaitForWritable(dpy
-#ifdef XTHREADS
-				  , cv
-#endif
-				  );
-#ifdef SUNSYSV
-	    } else if (ECHECK(0)) {
-		_XWaitForWritable(dpy
-#ifdef XTHREADS
-				  , cv
-#endif
-				  );
-#endif
-#ifdef ESZTEST
-	    } else if (ESZTEST()) {
-		if (todo > 1)
-		    todo >>= 1;
-		else {
-		    _XWaitForWritable(dpy
-#ifdef XTHREADS
-				      , cv
-#endif
-				      );
-		}
-#endif
-	    } else if (!ECHECK(EINTR)) {
-		/* Write failed! */
-		/* errno set by write system call. */
-		_XIOError(dpy);
-	    }
-	}
-	dpy->last_req = (char *)&_dummy_request;
-	_XSetSeqSyncFunction(dpy);
-	dpy->bufptr = dpy->buffer;
-#ifdef XTHREADS
-	dpy->flags &= ~XlibDisplayWriting;
-#endif
-}
-
-int
-_XEventsQueued(
-    register Display *dpy,
-    int mode)
-{
-	register int len;
-	BytesReadable_t pend;
-	_XAlignedBuffer buf;
-	register xReply *rep;
-	char *read_buf;
-#ifdef XTHREADS
-	int entry_event_serial_num;
-	struct _XCVList *cvl = NULL;
-	xthread_t self;
-
-#ifdef XTHREADS_DEBUG
-	printf("_XEventsQueued called in thread %x\n", XThread_Self());
-#endif
-#endif /* XTHREADS*/
-
-	if (mode == QueuedAfterFlush)
-	{
-	    _XFlush(dpy);
-	    if (dpy->qlen)
-		return(dpy->qlen);
-	}
-	if (dpy->flags & XlibDisplayIOError) return(dpy->qlen);
-
-#ifdef XTHREADS
-	/* create our condition variable and append to list,
-	 * unless we were called from within XProcessInternalConnection
-	 * or XLockDisplay
-	 */
-	xthread_clear_id(self);
-	if (dpy->lock && (xthread_have_id (dpy->lock->conni_thread)
-			  || xthread_have_id (dpy->lock->locking_thread)))
-	    /* some thread is in XProcessInternalConnection or XLockDisplay
-	       so we have to see if we are it */
-	    self = XThread_Self();
-	if (!xthread_have_id(self)
-	    || (!xthread_equal(self, dpy->lock->conni_thread)
-		&& !xthread_equal(self, dpy->lock->locking_thread))) {
-	    /* In the multi-threaded case, if there is someone else
-	       reading events, then there aren't any available, so
-	       we just return.  If we waited we would block.
-	       */
-	    if (dpy->lock && dpy->lock->event_awaiters)
-		return dpy->qlen;
-	    /* nobody here but us, so lock out any newcomers */
-	    cvl = QueueEventReaderLock(dpy);
-	}
-
-	while (dpy->lock && cvl && dpy->lock->reply_first) {
-	    /* note which events we have already seen so we'll know
-	       if _XReply (in another thread) reads one */
-	    entry_event_serial_num = dpy->next_event_serial_num;
-	    ConditionWait(dpy, cvl->cv);
-	    /* did _XReply read an event we can return? */
-	    if (_XNewerQueuedEvent(dpy, entry_event_serial_num))
-	    {
-		UnlockNextEventReader(dpy);
-		return 0;
-	    }
-	}
-#endif /* XTHREADS*/
-
-	if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)
-	    _XIOError(dpy);
-#ifdef XCONN_CHECK_FREQ
-	/* This is a crock, required because FIONREAD or equivalent is
-	 * not guaranteed to detect a broken connection.
-	 */
-	if (!pend && !dpy->qlen && ++dpy->conn_checker >= XCONN_CHECK_FREQ)
-	{
-	    int	result;
-#ifdef USE_POLL
-	    struct pollfd filedes;
-#else
-	    fd_set r_mask;
-	    static struct timeval zero_time;
-#endif
-
-	    dpy->conn_checker = 0;
-#ifdef USE_POLL
-	    filedes.fd = dpy->fd;
-	    filedes.events = POLLIN;
-	    if ((result = poll(&filedes, 1, 0)))
-#else
-	    FD_ZERO(&r_mask);
-	    FD_SET(dpy->fd, &r_mask);
-	    if ((result = Select(dpy->fd + 1, &r_mask, NULL, NULL, &zero_time)))
-#endif
-	    {
-		if (result > 0)
-		{
-		    if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)
-			_XIOError(dpy);
-		    /* we should not get zero, if we do, force a read */
-		    if (!pend)
-			pend = SIZEOF(xReply);
-		}
-		else if (result < 0 && !(ECHECK(EINTR) || ETEST()))
-		    _XIOError(dpy);
-	    }
-	}
-#endif /* XCONN_CHECK_FREQ */
-	if (!(len = pend)) {
-	    /* _XFlush can enqueue events */
-#ifdef XTHREADS
-	    if (cvl)
-#endif
-	    {
-		UnlockNextEventReader(dpy);
-	    }
-	    return(dpy->qlen);
-	}
-      /* Force a read if there is not enough data.  Otherwise,
-       * a select() loop at a higher-level will spin undesirably,
-       * and we've seen at least one OS that appears to not update
-       * the result from FIONREAD once it has returned nonzero.
-       */
-#ifdef XTHREADS
-	if (dpy->lock && dpy->lock->reply_awaiters) {
-	    read_buf = (char *)dpy->lock->reply_awaiters->buf;
-	    len = SIZEOF(xReply);
-	} else
-#endif /* XTHREADS*/
-	{
-	    read_buf = buf.buf;
-
-	    if (len < SIZEOF(xReply)
-#ifdef XTHREADS
-		|| dpy->async_handlers
-#endif
-		)
-		len = SIZEOF(xReply);
-	    else if (len > BUFSIZE)
-		len = BUFSIZE;
-	    len = (len / SIZEOF(xReply)) * SIZEOF(xReply);
-	}
-#ifdef XCONN_CHECK_FREQ
-	dpy->conn_checker = 0;
-#endif
-
-	(void) _XRead (dpy, read_buf, (long) len);
-
-#ifdef XTHREADS
-	/* what did we actually read: reply or event? */
-	if (dpy->lock && dpy->lock->reply_awaiters) {
-	    if (((xReply *)read_buf)->generic.type == X_Reply ||
-		((xReply *)read_buf)->generic.type == X_Error)
-	    {
-		dpy->lock->reply_was_read = True;
-		dpy->lock->reply_first = True;
-		if (read_buf != (char *)dpy->lock->reply_awaiters->buf)
-		    memcpy(dpy->lock->reply_awaiters->buf, read_buf,
-			   len);
-		if (cvl) {
-		    UnlockNextEventReader(dpy);
-		}
-		return(dpy->qlen); /* we read, so we can return */
-	    } else if (read_buf != buf.buf)
-		memcpy(buf.buf, read_buf, len);
-	}
-#endif /* XTHREADS*/
-
-	STARTITERATE(rep,xReply,buf.buf,len > 0) {
-	    if (rep->generic.type == X_Reply) {
-                int tmp = len;
-		RESETITERPTR(rep,xReply,
-			     _XAsyncReply (dpy, rep,
-					   ITERPTR(rep), &tmp, True));
-                len = tmp;
-		pend = len;
-	    } else {
-		if (rep->generic.type == X_Error)
-		    _XError (dpy, (xError *)rep);
-		else   /* must be an event packet */
-		    _XEnq (dpy, (xEvent *)rep);
-		INCITERPTR(rep,xReply);
-		len -= SIZEOF(xReply);
-	    }
-	} ENDITERATE
-
-#ifdef XTHREADS
-	if (cvl)
-#endif
-	{
-	    UnlockNextEventReader(dpy);
-	}
-	return(dpy->qlen);
-}
-
-/* _XReadEvents - Flush the output queue,
- * then read as many events as possible (but at least 1) and enqueue them
- */
-void _XReadEvents(
-	register Display *dpy)
-{
-	_XAlignedBuffer buf;
-	BytesReadable_t pend;
-	int len;
-	register xReply *rep;
-	Bool not_yet_flushed = True;
-	char *read_buf;
-	int i;
-	int entry_event_serial_num = dpy->next_event_serial_num;
-#ifdef XTHREADS
-	struct _XCVList *cvl = NULL;
-	xthread_t self;
-
-#ifdef XTHREADS_DEBUG
-	printf("_XReadEvents called in thread %x\n",
-	       XThread_Self());
-#endif
-	/* create our condition variable and append to list,
-	 * unless we were called from within XProcessInternalConnection
-	 * or XLockDisplay
-	 */
-	xthread_clear_id(self);
-	if (dpy->lock && (xthread_have_id (dpy->lock->conni_thread)
-			  || xthread_have_id (dpy->lock->locking_thread)))
-	    /* some thread is in XProcessInternalConnection or XLockDisplay
-	       so we have to see if we are it */
-	    self = XThread_Self();
-	if (!xthread_have_id(self)
-	    || (!xthread_equal(self, dpy->lock->conni_thread)
-		&& !xthread_equal(self, dpy->lock->locking_thread)))
-	    cvl = QueueEventReaderLock(dpy);
-#endif /* XTHREADS */
-
-	do {
-#ifdef XTHREADS
-	    /* if it is not our turn to read an event off the wire,
-	       wait til we're at head of list */
-	    if (dpy->lock && cvl &&
-		(dpy->lock->event_awaiters != cvl ||
-		 dpy->lock->reply_first)) {
-		ConditionWait(dpy, cvl->cv);
-		continue;
-	    }
-#endif /* XTHREADS */
-	    /* find out how much data can be read */
-	    if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)
-	    	_XIOError(dpy);
-	    len = pend;
-
-	    /* must read at least one xEvent; if none is pending, then
-	       we'll just flush and block waiting for it */
-	    if (len < SIZEOF(xEvent)
-#ifdef XTHREADS
-		|| dpy->async_handlers
-#endif
-		) {
-	    	len = SIZEOF(xEvent);
-		/* don't flush until the first time we would block */
-		if (not_yet_flushed) {
-		    _XFlush (dpy);
-		    if (_XNewerQueuedEvent(dpy, entry_event_serial_num)) {
-			/* _XReply has read an event for us */
-			goto got_event;
-		    }
-		    not_yet_flushed = False;
-		}
-	    }
-
-#ifdef XTHREADS
-	    /* If someone is waiting for a reply, gamble that
-	       the reply will be the next thing on the wire
-	       and read it into their buffer. */
-	    if (dpy->lock && dpy->lock->reply_awaiters) {
-		read_buf = (char *)dpy->lock->reply_awaiters->buf;
-		len = SIZEOF(xReply);
-	    } else
-#endif /* XTHREADS*/
-	    {
-		read_buf = buf.buf;
-
-		/* but we won't read more than the max buffer size */
-		if (len > BUFSIZE)
-		    len = BUFSIZE;
-
-		/* round down to an integral number of XReps */
-		len = (len / SIZEOF(xEvent)) * SIZEOF(xEvent);
-	    }
-
-#ifdef XTHREADS
-	    if (xthread_have_id(self))
-		/* save value we may have to stick in conni_thread */
-		dpy->lock->reading_thread = self;
-#endif /* XTHREADS */
-	    dpy->flags |= XlibDisplayReadEvents;
-	    i = _XRead (dpy, read_buf, (long) len);
-	    dpy->flags &= ~XlibDisplayReadEvents;
-	    if (i == -2) {
-		/* special flag from _XRead to say that internal connection has
-		   done XPutBackEvent.  Which we can use so we're done. */
-	      got_event:
-#ifdef XTHREADS
-		if (dpy->lock && dpy->lock->lock_wait) {
-		    if (dpy->lock->event_awaiters != cvl)
-			/* since it is not us, must be user lock thread */
-			ConditionSignal(dpy,
-					dpy->lock->event_awaiters->cv);
-		    (*dpy->lock->lock_wait)(dpy);
-		    continue;
-		}
-#endif
-		break;
-	    }
-#ifdef XTHREADS
-	    if (xthread_have_id(self))
-		xthread_clear_id(dpy->lock->reading_thread);
-
-	    /* what did we actually read: reply or event? */
-	    if (dpy->lock && dpy->lock->reply_awaiters) {
-		if (((xReply *)read_buf)->generic.type == X_Reply ||
-		    ((xReply *)read_buf)->generic.type == X_Error)
-		{
-		    dpy->lock->reply_was_read = True;
-		    dpy->lock->reply_first = True;
-		    if (read_buf != (char *)dpy->lock->reply_awaiters->buf)
-			memcpy(dpy->lock->reply_awaiters->buf,
-			       read_buf, len);
-		    ConditionSignal(dpy, dpy->lock->reply_awaiters->cv);
-		    continue;
-		} else if (read_buf != buf.buf)
-		    memcpy(buf.buf, read_buf, len);
-	    }
-#endif /* XTHREADS */
-
-	    STARTITERATE(rep,xReply,buf.buf,len > 0) {
-		if (rep->generic.type == X_Reply) {
-		    RESETITERPTR(rep,xReply,
-				 _XAsyncReply (dpy, rep,
-					       ITERPTR(rep), &len, True));
-		    pend = len;
-		} else {
-		    if (rep->generic.type == X_Error)
-			_XError (dpy, (xError *) rep);
-		    else   /* must be an event packet */
-                    {
-                        if (rep->generic.type == GenericEvent)
-                        {
-                            int evlen;
-                            evlen = (rep->generic.length << 2);
-                            if (_XRead(dpy, &read_buf[len], evlen) == -2)
-                                goto got_event; /* XXX: aargh! */
-                        }
-
-                        _XEnq (dpy, (xEvent *)rep);
-                    }
-		    INCITERPTR(rep,xReply);
-		    len -= SIZEOF(xReply);
-		}
-	    } ENDITERATE;
-	} while (!_XNewerQueuedEvent(dpy, entry_event_serial_num));
-
-	UnlockNextEventReader(dpy);
-}
-
-/*
- * _XRead - Read bytes from the socket taking into account incomplete
- * reads.  This routine may have to be reworked if int < long.
- */
-int _XRead(
-	register Display *dpy,
-	register char *data,
-	register long size)
-{
-	register long bytes_read;
-#ifdef XTHREADS
-	int original_size = size;
-#endif
-
-	if ((dpy->flags & XlibDisplayIOError) || size == 0)
-	    return 0;
-	ESET(0);
-	while ((bytes_read = _X11TransRead(dpy->trans_conn, data, (int)size))
-		!= size) {
-
-	    	if (bytes_read > 0) {
-		    size -= bytes_read;
-		    data += bytes_read;
-		    }
-		else if (ETEST()) {
-		    if (_XWaitForReadable(dpy) == -2)
-			return -2; /* internal connection did XPutBackEvent */
-		    ESET(0);
-		}
-#ifdef SUNSYSV
-		else if (ECHECK(0)) {
-		    if (_XWaitForReadable(dpy) == -2)
-			return -2; /* internal connection did XPutBackEvent */
-		}
-#endif
-		else if (bytes_read == 0) {
-		    /* Read failed because of end of file! */
-		    ESET(EPIPE);
-		    _XIOError(dpy);
-		    }
-
-		else  /* bytes_read is less than 0; presumably -1 */ {
-		    /* If it's a system call interrupt, it's not an error. */
-		    if (!ECHECK(EINTR))
-		    	_XIOError(dpy);
-		    }
-	    	 }
-#ifdef XTHREADS
-       if (dpy->lock && dpy->lock->reply_bytes_left > 0)
-       {
-           dpy->lock->reply_bytes_left -= original_size;
-           if (dpy->lock->reply_bytes_left == 0) {
-	       dpy->flags &= ~XlibDisplayReply;
-               UnlockNextReplyReader(dpy);
-	   }
-       }
-#endif /* XTHREADS*/
-	return 0;
-}
-#endif /* !USE_XCB */
-
-#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 */
-
-
-#if !USE_XCB
-/*
- * _XReadPad - Read bytes from the socket taking into account incomplete
- * reads.  If the number of bytes is not 0 mod 4, read additional pad
- * bytes. This routine may have to be reworked if int < long.
- */
-void _XReadPad(
-    	register Display *dpy,
-	register char *data,
-	register long size)
-{
-    	register long bytes_read;
-	struct iovec iov[2];
-	char pad[3];
-#ifdef XTHREADS
-        int original_size;
-#endif
-
-	if ((dpy->flags & XlibDisplayIOError) || size == 0) return;
-	iov[0].iov_len = (int)size;
-	iov[0].iov_base = data;
-	/*
-	 * The following hack is used to provide 32 bit long-word
-	 * aligned padding.  The [1] vector is of length 0, 1, 2, or 3,
-	 * whatever is needed.
-	 */
-
-	iov[1].iov_len = -size & 3;
-	iov[1].iov_base = pad;
-	size += iov[1].iov_len;
-#ifdef XTHREADS
-	original_size = size;
-#endif
-	ESET(0);
-	while ((bytes_read = _X11TransReadv (dpy->trans_conn, iov, 2)) != size) {
-
-	    if (bytes_read > 0) {
-		size -= bytes_read;
-		if (iov[0].iov_len < bytes_read) {
-		    int pad_bytes_read = bytes_read - iov[0].iov_len;
-		    iov[1].iov_len -= pad_bytes_read;
-		    iov[1].iov_base =
-			(char *)iov[1].iov_base + pad_bytes_read;
-		    iov[0].iov_len = 0;
-		    }
-	    	else {
-		    iov[0].iov_len -= bytes_read;
-	    	    iov[0].iov_base = (char *)iov[0].iov_base + bytes_read;
-	    	}
-	    }
-	    else if (ETEST()) {
-		_XWaitForReadable(dpy);
-		ESET(0);
-	    }
-#ifdef SUNSYSV
-	    else if (ECHECK(0)) {
-		_XWaitForReadable(dpy);
-	    }
-#endif
-	    else if (bytes_read == 0) {
-		/* Read failed because of end of file! */
-		ESET(EPIPE);
-		_XIOError(dpy);
-		}
-
-	    else  /* bytes_read is less than 0; presumably -1 */ {
-		/* If it's a system call interrupt, it's not an error. */
-		if (!ECHECK(EINTR))
-		    _XIOError(dpy);
-		}
-	    }
-#ifdef XTHREADS
-       if (dpy->lock && dpy->lock->reply_bytes_left > 0)
-       {
-           dpy->lock->reply_bytes_left -= original_size;
-           if (dpy->lock->reply_bytes_left == 0) {
-	       dpy->flags &= ~XlibDisplayReply;
-               UnlockNextReplyReader(dpy);
-	   }
-       }
-#endif /* XTHREADS*/
-}
-
-/*
- * _XSend - Flush the buffer and send the client data. 32 bit word aligned
- * transmission is used, if size is not 0 mod 4, extra bytes are transmitted.
- * This routine may have to be reworked if int < long;
- */
-void
-_XSend (
-	register Display *dpy,
-	_Xconst char *data,
-	register long size)
-{
-	struct iovec iov[3];
-	static char const pad[3] = {0, 0, 0};
-           /* XText8 and XText16 require that the padding bytes be zero! */
-
-	long skip, dbufsize, padsize, total, todo;
-	_XExtension *ext;
-
-	if (!size || (dpy->flags & XlibDisplayIOError)) return;
-	dbufsize = dpy->bufptr - dpy->buffer;
-#ifdef XTHREADS
-	dpy->flags |= XlibDisplayWriting;
-	/* make sure no one else can put in data */
-	dpy->bufptr = dpy->bufmax;
-#endif
-	padsize = -size & 3;
-	for (ext = dpy->flushes; ext; ext = ext->next_flush) {
-	    (*ext->before_flush)(dpy, &ext->codes, dpy->buffer, dbufsize);
-	    (*ext->before_flush)(dpy, &ext->codes, (char *)data, size);
-	    if (padsize)
-		(*ext->before_flush)(dpy, &ext->codes, pad, padsize);
-	}
-	skip = 0;
-	todo = total = dbufsize + size + padsize;
-
-	/*
-	 * There are 3 pieces that may need to be written out:
-	 *
-	 *     o  whatever is in the display buffer
-	 *     o  the data passed in by the user
-	 *     o  any padding needed to 32bit align the whole mess
-	 *
-	 * This loop looks at all 3 pieces each time through.  It uses skip
-	 * to figure out whether or not a given piece is needed.
-	 */
-	while (total) {
-	    long before = skip;		/* amount of whole thing written */
-	    long remain = todo;		/* amount to try this time, <= total */
-	    int i = 0;
-	    long len;
-
-	    /* You could be very general here and have "in" and "out" iovecs
-	     * and write a loop without using a macro, but what the heck.  This
-	     * translates to:
-	     *
-	     *     how much of this piece is new?
-	     *     if more new then we are trying this time, clamp
-	     *     if nothing new
-	     *         then bump down amount already written, for next piece
-	     *         else put new stuff in iovec, will need all of next piece
-	     *
-	     * Note that todo had better be at least 1 or else we'll end up
-	     * writing 0 iovecs.
-	     */
-#define InsertIOV(pointer, length) \
-	    len = (length) - before; \
-	    if (len > remain) \
-		len = remain; \
-	    if (len <= 0) { \
-		before = (-len); \
-	    } else { \
-		iov[i].iov_len = len; \
-		iov[i].iov_base = (pointer) + before; \
-		i++; \
-		remain -= len; \
-		before = 0; \
-	    }
-
-	    InsertIOV (dpy->buffer, dbufsize)
-	    InsertIOV ((char *)data, size)
-	    InsertIOV ((char *)pad, padsize)
-
-	    ESET(0);
-	    if ((len = _X11TransWritev(dpy->trans_conn, iov, i)) >= 0) {
-		skip += len;
-		total -= len;
-		todo = total;
-	    } else if (ETEST()) {
-		_XWaitForWritable(dpy
-#ifdef XTHREADS
-				  , NULL
-#endif
-				  );
-#ifdef SUNSYSV
-	    } else if (ECHECK(0)) {
-		_XWaitForWritable(dpy
-#ifdef XTHREADS
-				  , NULL
-#endif
-				  );
-#endif
-#ifdef ESZTEST
-	    } else if (ESZTEST()) {
-		if (todo > 1)
-		  todo >>= 1;
-		else {
-		    _XWaitForWritable(dpy
-#ifdef XTHREADS
-				      , NULL
-#endif
-				      );
-		}
-#endif
-	    } else if (!ECHECK(EINTR)) {
-		_XIOError(dpy);
-	    }
-	}
-	dpy->last_req = (char *) & _dummy_request;
-	_XSetSeqSyncFunction(dpy);
-	dpy->bufptr = dpy->buffer;
-#ifdef XTHREADS
-	dpy->flags &= ~XlibDisplayWriting;
-#endif
-	return;
-}
-
-static void
-_XGetMiscCode(
-    register Display *dpy)
-{
-    xQueryExtensionReply qrep;
-    register xQueryExtensionReq *qreq;
-    xXCMiscGetVersionReply vrep;
-    register xXCMiscGetVersionReq *vreq;
-
-    if (dpy->xcmisc_opcode)
-	return;
-    GetReq(QueryExtension, qreq);
-    qreq->nbytes = sizeof(XCMiscExtensionName) - 1;
-    qreq->length += (qreq->nbytes+(unsigned)3)>>2;
-    _XSend(dpy, XCMiscExtensionName, (long)qreq->nbytes);
-    if (!_XReply (dpy, (xReply *)&qrep, 0, xTrue))
-	dpy->xcmisc_opcode = -1;
-    else {
-	GetReq(XCMiscGetVersion, vreq);
-	vreq->reqType = qrep.major_opcode;
-	vreq->miscReqType = X_XCMiscGetVersion;
-	vreq->majorVersion = XCMiscMajorVersion;
-	vreq->minorVersion = XCMiscMinorVersion;
-	if (!_XReply (dpy, (xReply *)&vrep, 0, xTrue))
-	    dpy->xcmisc_opcode = -1;
-	else
-	    dpy->xcmisc_opcode = qrep.major_opcode;
-    }
-}
-
-int
-_XIDHandler(
-    register Display *dpy)
-{
-    xXCMiscGetXIDRangeReply grep;
-    register xXCMiscGetXIDRangeReq *greq;
-    int sent_req = 0;
-
-    LockDisplay(dpy);
-    if (dpy->resource_max == dpy->resource_mask + 1) {
-	_XGetMiscCode(dpy);
-	if (dpy->xcmisc_opcode > 0) {
-	    GetReq(XCMiscGetXIDRange, greq);
-	    greq->reqType = dpy->xcmisc_opcode;
-	    greq->miscReqType = X_XCMiscGetXIDRange;
-	    if (_XReply (dpy, (xReply *)&grep, 0, xTrue) && grep.count) {
-		dpy->resource_id = ((grep.start_id - dpy->resource_base) >>
-				    dpy->resource_shift);
-		dpy->resource_max = dpy->resource_id;
-		if (grep.count > 5)
-		    dpy->resource_max += grep.count - 6;
-		dpy->resource_max <<= dpy->resource_shift;
-	    }
-	    sent_req = 1;
-	}
-    }
-    UnlockDisplay(dpy);
-    if (sent_req)
-	SyncHandle();
-    return 0;
-}
-
-/*
- * _XAllocID - resource ID allocation routine.
- */
-XID _XAllocID(
-    register Display *dpy)
-{
-   XID id;
-
-   id = dpy->resource_id << dpy->resource_shift;
-   if (id >= dpy->resource_max) {
-	_XSetPrivSyncFunction(dpy);
-       dpy->resource_max = dpy->resource_mask + 1;
-   }
-   if (id <= dpy->resource_mask) {
-       dpy->resource_id++;
-       return (dpy->resource_base + id);
-   }
-   if (id != 0x10000000) {
-       (void) fprintf(stderr,
-		      "Xlib: resource ID allocation space exhausted!\n");
-       id = 0x10000000;
-       dpy->resource_id = id >> dpy->resource_shift;
-   }
-   return id;
-}
-
-/*
- * _XAllocIDs - multiple resource ID allocation routine.
- */
-void _XAllocIDs(
-    register Display *dpy,
-    XID *ids,
-    int count)
-{
-    XID id;
-    int i;
-    xXCMiscGetXIDListReply grep;
-    register xXCMiscGetXIDListReq *greq;
-
-    id = dpy->resource_id << dpy->resource_shift;
-    if (dpy->resource_max <= dpy->resource_mask &&
-	id <= dpy->resource_mask &&
-	(dpy->resource_max - id) > ((count - 1) << dpy->resource_shift)) {
-	id += dpy->resource_base;
-	for (i = 0; i < count; i++) {
-	    ids[i] = id;
-	    id += (1 << dpy->resource_shift);
-	    dpy->resource_id++;
-	}
-	return;
-    }
-    grep.count = 0;
-    _XGetMiscCode(dpy);
-    if (dpy->xcmisc_opcode > 0) {
-	GetReq(XCMiscGetXIDList, greq);
-	greq->reqType = dpy->xcmisc_opcode;
-	greq->miscReqType = X_XCMiscGetXIDList;
-	greq->count = count;
-	if (_XReply(dpy, (xReply *)&grep, 0, xFalse) && grep.count) {
-	    _XRead32(dpy, (long *) ids, 4L * (long) (grep.count));
-	    for (i = 0; i < grep.count; i++) {
-		id = (ids[i] - dpy->resource_base) >> dpy->resource_shift;
-		if (id >= dpy->resource_id)
-		    dpy->resource_id = id;
-	    }
-	    if (id >= dpy->resource_max) {
-		_XSetPrivSyncFunction(dpy);
-		dpy->resource_max = dpy->resource_mask + 1;
-	    }
-	}
-    }
-    for (i = grep.count; i < count; i++)
-	ids[i] = XAllocID(dpy);
-}
-#endif /* !USE_XCB */
-
-/*
- * 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);
-}
-
-#if !USE_XCB
-/*
- * _XReply - Wait for a reply packet and copy its contents into the
- * specified rep.  Meanwhile we must handle error and event packets that
- * we may encounter.
- */
-Status
-_XReply (
-    register Display *dpy,
-    register xReply *rep,
-    int extra,		/* number of 32-bit words expected after the reply */
-    Bool discard)	/* should I discard data following "extra" words? */
-{
-    /* Pull out the serial number now, so that (currently illegal) requests
-     * generated by an error handler don't confuse us.
-     */
-    unsigned long cur_request = dpy->request;
-#ifdef XTHREADS
-    struct _XCVList *cvl;
-#endif
-
-    if (dpy->flags & XlibDisplayIOError)
-	return 0;
-
-#ifdef XTHREADS
-    /* create our condition variable and append to list */
-    cvl = QueueReplyReaderLock(dpy);
-    if (cvl) {
-	cvl->buf = rep;
-	if (dpy->lock->reply_awaiters == cvl && !dpy->lock->event_awaiters)
-	    dpy->lock->reply_first = True;
-    }
-
-#ifdef XTHREADS_DEBUG
-    printf("_XReply called in thread %x, adding %x to cvl\n",
-	   XThread_Self(), cvl);
-#endif
-
-    _XFlushInt(dpy, cvl ? cvl->cv : NULL);
-    /* if it is not our turn to read a reply off the wire,
-     * wait til we're at head of list.  if there is an event waiter,
-     * and our reply hasn't been read, they'll be in select and will
-     * hand control back to us next.
-     */
-    if(dpy->lock &&
-       (dpy->lock->reply_awaiters != cvl || !dpy->lock->reply_first)) {
-	ConditionWait(dpy, cvl->cv);
-    }
-    dpy->flags |= XlibDisplayReply;
-#else /* XTHREADS else */
-    _XFlush(dpy);
-#endif
-
-    for (;;) {
-#ifdef XTHREADS
-	/* Did another thread's _XReadEvents get our reply by accident? */
-	if (!dpy->lock || !dpy->lock->reply_was_read)
-#endif
-	    (void) _XRead(dpy, (char *)rep, (long)SIZEOF(xReply));
-#ifdef XTHREADS
-	if (dpy->lock)
-	    dpy->lock->reply_was_read = False;
-#endif
-
-	switch ((int)rep->generic.type) {
-
-	    case X_Reply:
-	        /* Reply received.  Fast update for synchronous replies,
-		 * but deal with multiple outstanding replies.
-		 */
-	        if (rep->generic.sequenceNumber == (cur_request & 0xffff))
-		    dpy->last_request_read = cur_request;
-		else {
-		    int pend = SIZEOF(xReply);
-		    if (_XAsyncReply(dpy, rep, (char *)rep, &pend, False)
-			!= (char *)rep)
-			continue;
-		}
-		if (extra <= rep->generic.length) {
-		    if (extra > 0)
-			/*
-			 * Read the extra data into storage immediately
-			 * following the GenericReply structure.
-			 */
-			(void) _XRead (dpy, (char *) (NEXTPTR(rep,xReply)),
-				((long)extra) << 2);
-		    if (discard) {
-			if (extra < rep->generic.length)
-			    _XEatData(dpy, (rep->generic.length - extra) << 2);
-		    }
-#ifdef XTHREADS
-		    if (dpy->lock) {
-			if (discard) {
-			    dpy->lock->reply_bytes_left = 0;
-			} else {
-			    dpy->lock->reply_bytes_left =
-				(rep->generic.length - extra) << 2;
-			}
-			if (dpy->lock->reply_bytes_left == 0) {
-			    dpy->flags &= ~XlibDisplayReply;
-			    UnlockNextReplyReader(dpy);
-			}
-		    } else
-			dpy->flags &= ~XlibDisplayReply;
-#endif
-		    return 1;
-		}
-		/*
-		 *if we get here, then extra > rep->generic.length--meaning we
-		 * read a reply that's shorter than we expected.  This is an
-		 * error,  but we still need to figure out how to handle it...
-		 */
-		(void) _XRead (dpy, (char *) (NEXTPTR(rep,xReply)),
-			((long) rep->generic.length) << 2);
-		dpy->flags &= ~XlibDisplayReply;
-		UnlockNextReplyReader(dpy);
-		_XIOError (dpy);
-		return (0);
-
-    	    case X_Error:
-	    	{
-	        register _XExtension *ext;
-		register Bool ret = False;
-		int ret_code;
-		xError *err = (xError *) rep;
-		unsigned long serial;
-
-		dpy->flags &= ~XlibDisplayReply;
-		serial = _XSetLastRequestRead(dpy, (xGenericReply *)rep);
-		if (serial == cur_request)
-			/* do not die on "no such font", "can't allocate",
-			   "can't grab" failures */
-			switch ((int)err->errorCode) {
-			case BadName:
-			    switch (err->majorCode) {
-				case X_LookupColor:
-				case X_AllocNamedColor:
-				    UnlockNextReplyReader(dpy);
-				    return(0);
-			    }
-			    break;
-			case BadFont:
-			    if (err->majorCode == X_QueryFont) {
-				UnlockNextReplyReader(dpy);
-				return (0);
-			    }
-			    break;
-			case BadAlloc:
-			case BadAccess:
-			    UnlockNextReplyReader(dpy);
-			    return (0);
-			}
-		/*
-		 * we better see if there is an extension who may
-		 * want to suppress the error.
-		 */
-		for (ext = dpy->ext_procs; !ret && ext; ext = ext->next) {
-		    if (ext->error)
-		       ret = (*ext->error)(dpy, err, &ext->codes, &ret_code);
-		}
-		if (!ret) {
-		    _XError(dpy, err);
-		    ret_code = 0;
-		}
-		if (serial == cur_request) {
-		    UnlockNextReplyReader(dpy);
-		    return(ret_code);
-		}
-
-		} /* case X_Error */
-		break;
-	    default:
-		_XEnq(dpy, (xEvent *) rep);
-#ifdef XTHREADS
-		if (dpy->lock && dpy->lock->event_awaiters)
-		    ConditionSignal(dpy, dpy->lock->event_awaiters->cv);
-#endif
-		break;
-	    }
-	}
-}
-
-static char *
-_XAsyncReply(
-    Display *dpy,
-    register xReply *rep,
-    char *buf,
-    register int *lenp,
-    Bool discard)
-{
-    register _XAsyncHandler *async, *next;
-    register int len;
-    register Bool consumed = False;
-    char *nbuf;
-
-    (void) _XSetLastRequestRead(dpy, &rep->generic);
-    len = SIZEOF(xReply) + (rep->generic.length << 2);
-    if (len < SIZEOF(xReply)) {
-	_XIOError (dpy);
-	buf += *lenp;
-	*lenp = 0;
-	return buf;
-    }
-
-    for (async = dpy->async_handlers; async; async = next) {
-	next = async->next;
-	if ((consumed = (*async->handler)(dpy, rep, buf, *lenp, async->data)))
-	    break;
-    }
-    if (!consumed) {
-	if (!discard)
-	    return buf;
-	(void) fprintf(stderr,
-		       "Xlib: unexpected async reply (sequence 0x%lx)!\n",
-		       dpy->last_request_read);
-#ifdef XTHREADS
-#ifdef XTHREADS_DEBUG
-	printf("thread %x, unexpected async reply\n", XThread_Self());
-#endif
-#endif
-	if (len > *lenp)
-	    _XEatData(dpy, len - *lenp);
-    }
-    if (len < SIZEOF(xReply))
-    {
-	_XIOError (dpy);
-	buf += *lenp;
-	*lenp = 0;
-	return buf;
-    }
-    if (len >= *lenp) {
-	buf += *lenp;
-	*lenp = 0;
-	return buf;
-    }
-    *lenp -= len;
-    buf += len;
-    len = *lenp;
-    nbuf = buf;
-    while (len > SIZEOF(xReply)) {
-	if (*buf == X_Reply)
-	    return nbuf;
-	buf += SIZEOF(xReply);
-	len -= SIZEOF(xReply);
-    }
-    if (len > 0 && len < SIZEOF(xReply)) {
-	buf = nbuf;
-	len = SIZEOF(xReply) - len;
-	nbuf -= len;
-	memmove(nbuf, buf, *lenp);
-	(void) _XRead(dpy, nbuf + *lenp, (long)len);
-	*lenp += len;
-    }
-    return nbuf;
-}
-#endif /* !USE_XCB */
-
-/*
- * 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;
-#if defined(XTHREADS) && !USE_XCB
-    if (dpy->lock) {
-	/* check cache to avoid call to thread_self */
-	if (xthread_have_id(dpy->lock->reading_thread))
-	    dpy->lock->conni_thread = dpy->lock->reading_thread;
-	else
-	    dpy->lock->conni_thread = XThread_Self();
-    }
-#endif /* XTHREADS && !USE_XCB */
-    UnlockDisplay(dpy);
-    (*conn_info->read_callback) (dpy, conn_info->fd, conn_info->call_data);
-    LockDisplay(dpy);
-#if defined(XTHREADS) && !USE_XCB
-    if (dpy->lock)
-	xthread_clear_id(dpy->lock->conni_thread);
-#endif /* XTHREADS && !USE_XCB */
-    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 */
-
-
-#if !USE_XCB
-/* Read and discard "n" 8-bit bytes of data */
-
-void _XEatData(
-    Display *dpy,
-    register unsigned long n)
-{
-#define SCRATCHSIZE 2048
-    char buf[SCRATCHSIZE];
-
-    while (n > 0) {
-	register long bytes_read = (n > SCRATCHSIZE) ? SCRATCHSIZE : n;
-	(void) _XRead (dpy, buf, bytes_read);
-	n -= bytes_read;
-    }
-#undef SCRATCHSIZE
-}
-#endif /* !USE_XCB */
-
-/* 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;
-	/* 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) {
-	int rtn_val;
-#if defined(XTHREADS) && !USE_XCB
-	if (dpy->lock)
-	    (*dpy->lock->user_lock_display)(dpy);
-	UnlockDisplay(dpy);
-#endif /* XTHREADS && !USE_XCB */
-	rtn_val = (*_XErrorFunction)(dpy, (XErrorEvent *)&event); /* upcall */
-#if defined(XTHREADS) && !USE_XCB
-	LockDisplay(dpy);
-	if (dpy->lock)
-	    (*dpy->lock->user_unlock_display)(dpy);
-#endif /* XTHREADS && !USE_XCB */
-	return rtn_val;
-    } 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>
-#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.

+ */

+#define NEED_EVENTS

+#define NEED_REPLIES

+

+#ifdef WIN32

+#define _XLIBINT_

+#include <X11\Xw32defs.h>

+#endif

+#ifdef HAVE_CONFIG_H

+#include <config.h>

+#endif

+#include "Xlibint.h"

+#include "Xprivate.h"

+#include <X11/Xpoll.h>

+#if !USE_XCB

+#include <X11/Xtrans/Xtrans.h>

+#include <X11/extensions/xcmiscstr.h>

+#endif /* !USE_XCB */

+#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)())

+

+#if !USE_XCB

+#define UnlockNextReplyReader(d) if ((d)->lock) \

+    (*(d)->lock->pop_reader)((d),&(d)->lock->reply_awaiters,&(d)->lock->reply_awaiters_tail)

+

+#define QueueReplyReaderLock(d) ((d)->lock ? \

+    (*(d)->lock->push_reader)(d,&(d)->lock->reply_awaiters_tail) : NULL)

+#define QueueEventReaderLock(d) ((d)->lock ? \

+    (*(d)->lock->push_reader)(d,&(d)->lock->event_awaiters_tail) : NULL)

+#endif /* !USE_XCB */

+

+#else /* XTHREADS else */

+

+#if !USE_XCB

+#define UnlockNextReplyReader(d)

+#define UnlockNextEventReader(d)

+#endif /* !USE_XCB */

+

+#endif /* XTHREADS else */

+

+/* 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__

+#if !USE_XCB

+#define select(n,r,w,x,t) os2ClientSelect(n,r,w,x,t)

+#endif /* !USE_XCB */

+#include <limits.h>

+#define MAX_PATH _POSIX_PATH_MAX

+#endif

+

+#if !USE_XCB

+#ifdef MUSTCOPY

+

+#define STARTITERATE(tpvar,type,start,endcond) \

+  { register char *cpvar; \

+  for (cpvar = (char *) (start); endcond; ) { \

+    type dummy; memcpy ((char *) &dummy, cpvar, SIZEOF(type)); \

+    tpvar = &dummy;

+#define ITERPTR(tpvar) cpvar

+#define RESETITERPTR(tpvar,type,start) cpvar = start

+#define INCITERPTR(tpvar,type) cpvar += SIZEOF(type)

+#define ENDITERATE }}

+

+#else

+

+#define STARTITERATE(tpvar,type,start,endcond) \

+  for (tpvar = (type *) (start); endcond; )

+#define ITERPTR(tpvar) (char *)tpvar

+#define RESETITERPTR(tpvar,type,start) tpvar = (type *) (start)

+#define INCITERPTR(tpvar,type) tpvar++

+#define ENDITERATE

+

+#endif /* MUSTCOPY */

+

+typedef union {

+    xReply rep;

+    char buf[BUFSIZE];

+} _XAlignedBuffer;

+

+static char *_XAsyncReply(

+    Display *dpy,

+    register xReply *rep,

+    char *buf,

+    register int *lenp,

+    Bool discard);

+#endif /* !USE_XCB */

+

+/*

+ * 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.

+ */

+

+#if !USE_XCB

+static xReq _dummy_request = {

+	0, 0, 0

+};

+

+/*

+ * This is an OS dependent routine which:

+ * 1) returns as soon as the connection can be written on....

+ * 2) if the connection can be read, must enqueue events and handle errors,

+ * until the connection is writable.

+ */

+static void

+_XWaitForWritable(

+    Display *dpy

+#ifdef XTHREADS

+    ,

+    xcondition_t cv		/* our reading condition variable */

+#endif

+    )

+{

+#ifdef USE_POLL

+    struct pollfd filedes;

+#else

+    fd_set r_mask;

+    fd_set w_mask;

+#endif

+    int nfound;

+

+#ifdef USE_POLL

+    filedes.fd = dpy->fd;

+    filedes.events = 0;

+#else

+    FD_ZERO(&r_mask);

+    FD_ZERO(&w_mask);

+#endif

+

+    for (;;) {

+#ifdef XTHREADS

+	/* We allow only one thread at a time to read, to minimize

+	   passing of read data between threads.

+	   Now, who is it?  If there is a non-NULL reply_awaiters and

+	   we (i.e., our cv) are not at the head of it, then whoever

+	   is at the head is the reader, and we don't read.

+	   Otherwise there is no reply_awaiters or we are at the

+	   head, having just appended ourselves.

+	   In this case, if there is a event_awaiters, then whoever

+	   is at the head of it got there before we did, and they are the

+	   reader.

+

+	   Last cases: no event_awaiters and we are at the head of

+	   reply_awaiters or reply_awaiters is NULL: we are the reader,

+	   since there is obviously no one else involved.

+

+	   XXX - what if cv is NULL and someone else comes along after

+	   us while we are waiting?

+	   */

+

+	if (!dpy->lock ||

+	    (!dpy->lock->event_awaiters &&

+	     (!dpy->lock->reply_awaiters ||

+	      dpy->lock->reply_awaiters->cv == cv)))

+#endif

+#ifdef USE_POLL

+	    filedes.events = POLLIN;

+	filedes.events |= POLLOUT;

+#else

+	FD_SET(dpy->fd, &r_mask);

+        FD_SET(dpy->fd, &w_mask);

+#endif

+

+	do {

+	    UnlockDisplay(dpy);

+#ifdef USE_POLL

+	    nfound = poll (&filedes, 1, -1);

+#else

+	    nfound = Select (dpy->fd + 1, &r_mask, &w_mask, NULL, NULL);

+#endif

+	    InternalLockDisplay(dpy, cv != NULL);

+	    if (nfound < 0 && !(ECHECK(EINTR) || ETEST()))

+		_XIOError(dpy);

+	} while (nfound <= 0);

+

+	if (

+#ifdef USE_POLL

+	    filedes.revents & POLLIN

+#else

+	    FD_ISSET(dpy->fd, &r_mask)

+#endif

+	    )

+	{

+	    _XAlignedBuffer buf;

+	    BytesReadable_t pend;

+	    register int len;

+	    register xReply *rep;

+

+	    /* find out how much data can be read */

+	    if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)

+		_XIOError(dpy);

+	    len = pend;

+

+	    /* must read at least one xEvent; if none is pending, then

+	       we'll just block waiting for it */

+	    if (len < SIZEOF(xReply)

+#ifdef XTHREADS

+		|| dpy->async_handlers

+#endif

+		)

+		len = SIZEOF(xReply);

+

+	    /* but we won't read more than the max buffer size */

+	    if (len > BUFSIZE) len = BUFSIZE;

+

+	    /* round down to an integral number of XReps */

+	    len = (len / SIZEOF(xReply)) * SIZEOF(xReply);

+

+	    (void) _XRead (dpy, buf.buf, (long) len);

+

+	    STARTITERATE(rep,xReply,buf.buf,len > 0) {

+		if (rep->generic.type == X_Reply) {

+                    int tmp = len;

+		    RESETITERPTR(rep,xReply,

+				 _XAsyncReply (dpy, rep,

+					       ITERPTR(rep), &tmp, True));

+                    len = tmp;

+		    pend = len;

+		} else {

+		    if (rep->generic.type == X_Error)

+			_XError (dpy, (xError *)rep);

+		    else	/* must be an event packet */

+			_XEnq (dpy, (xEvent *)rep);

+		    INCITERPTR(rep,xReply);

+		    len -= SIZEOF(xReply);

+		}

+	    } ENDITERATE

+#ifdef XTHREADS

+	    if (dpy->lock && dpy->lock->event_awaiters)

+		ConditionSignal(dpy, dpy->lock->event_awaiters->cv);

+#endif

+	}

+#ifdef USE_POLL

+	if (filedes.revents & (POLLOUT|POLLHUP|POLLERR))

+#else

+	if (FD_ISSET(dpy->fd, &w_mask))

+#endif

+	{

+#ifdef XTHREADS

+	    if (dpy->lock) {

+		ConditionBroadcast(dpy, dpy->lock->writers);

+	    }

+#endif

+	    return;

+	}

+    }

+}

+#endif /* !USE_XCB */

+

+

+#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

+}

+

+#if !USE_XCB

+/* returns True iff there is an event in the queue newer than serial_num */

+

+static Bool

+_XNewerQueuedEvent(

+    Display *dpy,

+    int serial_num)

+{

+    _XQEvent *qev;

+

+    if (dpy->next_event_serial_num == serial_num)

+	return False;

+

+    qev = dpy->head;

+    while (qev) {

+	if (qev->qserial_num >= serial_num) {

+	    return True;

+	}

+	qev = qev->next;

+    }

+    return False;

+}

+

+static int

+_XWaitForReadable(

+  Display *dpy)

+{

+    int result;

+    int fd = dpy->fd;

+    struct _XConnectionInfo *ilist;

+    register int saved_event_serial = 0;

+    int in_read_events = 0;

+    register Bool did_proc_conni = False;

+#ifdef USE_POLL

+    struct pollfd *filedes;

+#else

+    fd_set r_mask;

+    int highest_fd = fd;

+#endif

+

+#ifdef USE_POLL

+    if (dpy->im_fd_length + 1 > POLLFD_CACHE_SIZE

+	&& !(dpy->flags & XlibDisplayProcConni)) {

+	/* XXX - this fallback is gross */

+	int i;

+

+	filedes = (struct pollfd *)Xmalloc(dpy->im_fd_length * sizeof(struct pollfd));

+	filedes[0].fd = fd;

+	filedes[0].events = POLLIN;

+	for (ilist=dpy->im_fd_info, i=1; ilist; ilist=ilist->next, i++) {

+	    filedes[i].fd = ilist->fd;

+	    filedes[i].events = POLLIN;

+	}

+    } else {

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

+    }

+#else

+    FD_ZERO(&r_mask);

+#endif

+    for (;;) {

+#ifndef USE_POLL

+	FD_SET(fd, &r_mask);

+	if (!(dpy->flags & XlibDisplayProcConni))

+	    for (ilist=dpy->im_fd_info; ilist; ilist=ilist->next) {

+		FD_SET(ilist->fd, &r_mask);

+		if (ilist->fd > highest_fd)

+		    highest_fd = ilist->fd;

+	    }

+#endif

+	UnlockDisplay(dpy);

+#ifdef USE_POLL

+	result = poll(filedes,

+		      (dpy->flags & XlibDisplayProcConni) ? 1 : 1+dpy->im_fd_length,

+		      -1);

+#else

+	result = Select(highest_fd + 1, &r_mask, NULL, NULL, NULL);

+#endif

+	InternalLockDisplay(dpy, dpy->flags & XlibDisplayReply);

+	if (result == -1 && !(ECHECK(EINTR) || ETEST())) _XIOError(dpy);

+	if (result <= 0)

+	    continue;

+#ifdef USE_POLL

+	if (filedes[0].revents & (POLLIN|POLLHUP|POLLERR))

+#else

+	if (FD_ISSET(fd, &r_mask))

+#endif

+	    break;

+	if (!(dpy->flags & XlibDisplayProcConni)) {

+	    int i;

+

+	    saved_event_serial = dpy->next_event_serial_num;

+	    /* dpy flags can be clobbered by internal connection callback */

+	    in_read_events = dpy->flags & XlibDisplayReadEvents;

+	    for (ilist=dpy->im_fd_info, i=1; ilist; ilist=ilist->next, i++) {

+#ifdef USE_POLL

+		if (filedes[i].revents & POLLIN)

+#else

+		if (FD_ISSET(ilist->fd, &r_mask))

+#endif

+		{

+		    _XProcessInternalConnection(dpy, ilist);

+		    did_proc_conni = True;

+		}

+	    }

+#ifdef USE_POLL

+	    if (dpy->im_fd_length + 1 > POLLFD_CACHE_SIZE)

+		Xfree(filedes);

+#endif

+	}

+	if (did_proc_conni) {

+	    /* some internal connection callback might have done an

+	       XPutBackEvent.  We notice it here and if we needed an event,

+	       we can return all the way. */

+	    if (_XNewerQueuedEvent(dpy, saved_event_serial)

+		&& (in_read_events

+#ifdef XTHREADS

+		    || (dpy->lock && dpy->lock->event_awaiters)

+#endif

+		    ))

+		return -2;

+	    did_proc_conni = False;

+	}

+    }

+#ifdef XTHREADS

+#ifdef XTHREADS_DEBUG

+    printf("thread %x _XWaitForReadable returning\n", XThread_Self());

+#endif

+#endif

+    return 0;

+}

+#endif /* !USE_XCB */

+

+#ifdef _MSC_VER

+#undef min

+#define min __min

+#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)

+{

+#ifdef 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);

+}

+

+#if !USE_XCB

+#ifdef XTHREADS

+static void _XFlushInt(

+        register Display *dpy,

+        register xcondition_t cv);

+#endif

+

+/*

+ * _XFlush - Flush the X request buffer.  If the buffer is empty, no

+ * action is taken.  This routine correctly handles incremental writes.

+ * This routine may have to be reworked if int < long.

+ */

+void _XFlush(

+	register Display *dpy)

+{

+#ifdef XTHREADS

+    /* With multi-threading we introduce an internal routine to which

+       we can pass a condition variable to do locking correctly. */

+

+    _XFlushInt(dpy, NULL);

+}

+

+/* _XFlushInt - Internal version of _XFlush used to do multi-threaded

+ * locking correctly.

+ */

+

+static void _XFlushInt(

+	register Display *dpy,

+        register xcondition_t cv)

+{

+#endif /* XTHREADS*/

+	register long size, todo;

+	register int write_stat;

+	register char *bufindex;

+	_XExtension *ext;

+

+	/* This fix resets the bufptr to the front of the buffer so

+	 * additional appends to the bufptr will not corrupt memory. Since

+	 * the server is down, these appends are no-op's anyway but

+	 * callers of _XFlush() are not verifying this before they call it.

+	 */

+	if (dpy->flags & XlibDisplayIOError)

+	{

+	    dpy->bufptr = dpy->buffer;

+	    dpy->last_req = (char *)&_dummy_request;

+	    return;

+	}

+

+#ifdef XTHREADS

+	while (dpy->flags & XlibDisplayWriting) {

+	    if (dpy->lock) {

+		ConditionWait(dpy, dpy->lock->writers);

+	    } else {

+		_XWaitForWritable (dpy, cv);

+	    }

+	}

+#endif

+	size = todo = dpy->bufptr - dpy->buffer;

+	if (!size) return;

+#ifdef XTHREADS

+	dpy->flags |= XlibDisplayWriting;

+	/* make sure no one else can put in data */

+	dpy->bufptr = dpy->bufmax;

+#endif

+	for (ext = dpy->flushes; ext; ext = ext->next_flush)

+	    (*ext->before_flush)(dpy, &ext->codes, dpy->buffer, size);

+	bufindex = dpy->buffer;

+	/*

+	 * While write has not written the entire buffer, keep looping

+	 * until the entire buffer is written.  bufindex will be

+	 * incremented and size decremented as buffer is written out.

+	 */

+	while (size) {

+	    ESET(0);

+	    write_stat = _X11TransWrite(dpy->trans_conn,

+					bufindex, (int) todo);

+	    if (write_stat >= 0) {

+		size -= write_stat;

+		todo = size;

+		bufindex += write_stat;

+	    } else if (ETEST()) {

+		_XWaitForWritable(dpy

+#ifdef XTHREADS

+				  , cv

+#endif

+				  );

+#ifdef SUNSYSV

+	    } else if (ECHECK(0)) {

+		_XWaitForWritable(dpy

+#ifdef XTHREADS

+				  , cv

+#endif

+				  );

+#endif

+#ifdef ESZTEST

+	    } else if (ESZTEST()) {

+		if (todo > 1)

+		    todo >>= 1;

+		else {

+		    _XWaitForWritable(dpy

+#ifdef XTHREADS

+				      , cv

+#endif

+				      );

+		}

+#endif

+	    } else if (!ECHECK(EINTR)) {

+		/* Write failed! */

+		/* errno set by write system call. */

+		_XIOError(dpy);

+	    }

+	}

+	dpy->last_req = (char *)&_dummy_request;

+	_XSetSeqSyncFunction(dpy);

+	dpy->bufptr = dpy->buffer;

+#ifdef XTHREADS

+	dpy->flags &= ~XlibDisplayWriting;

+#endif

+}

+

+int

+_XEventsQueued(

+    register Display *dpy,

+    int mode)

+{

+	register int len;

+	BytesReadable_t pend;

+	_XAlignedBuffer buf;

+	register xReply *rep;

+	char *read_buf;

+#ifdef XTHREADS

+	int entry_event_serial_num;

+	struct _XCVList *cvl = NULL;

+	xthread_t self;

+

+#ifdef XTHREADS_DEBUG

+	printf("_XEventsQueued called in thread %x\n", XThread_Self());

+#endif

+#endif /* XTHREADS*/

+

+	if (mode == QueuedAfterFlush)

+	{

+	    _XFlush(dpy);

+	    if (dpy->qlen)

+		return(dpy->qlen);

+	}

+	if (dpy->flags & XlibDisplayIOError) return(dpy->qlen);

+

+#ifdef XTHREADS

+	/* create our condition variable and append to list,

+	 * unless we were called from within XProcessInternalConnection

+	 * or XLockDisplay

+	 */

+	xthread_clear_id(self);

+	if (dpy->lock && (xthread_have_id (dpy->lock->conni_thread)

+			  || xthread_have_id (dpy->lock->locking_thread)))

+	    /* some thread is in XProcessInternalConnection or XLockDisplay

+	       so we have to see if we are it */

+	    self = XThread_Self();

+	if (!xthread_have_id(self)

+	    || (!xthread_equal(self, dpy->lock->conni_thread)

+		&& !xthread_equal(self, dpy->lock->locking_thread))) {

+	    /* In the multi-threaded case, if there is someone else

+	       reading events, then there aren't any available, so

+	       we just return.  If we waited we would block.

+	       */

+	    if (dpy->lock && dpy->lock->event_awaiters)

+		return dpy->qlen;

+	    /* nobody here but us, so lock out any newcomers */

+	    cvl = QueueEventReaderLock(dpy);

+	}

+

+	while (dpy->lock && cvl && dpy->lock->reply_first) {

+	    /* note which events we have already seen so we'll know

+	       if _XReply (in another thread) reads one */

+	    entry_event_serial_num = dpy->next_event_serial_num;

+	    ConditionWait(dpy, cvl->cv);

+	    /* did _XReply read an event we can return? */

+	    if (_XNewerQueuedEvent(dpy, entry_event_serial_num))

+	    {

+		UnlockNextEventReader(dpy);

+		return 0;

+	    }

+	}

+#endif /* XTHREADS*/

+

+	if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)

+	    _XIOError(dpy);

+#ifdef XCONN_CHECK_FREQ

+	/* This is a crock, required because FIONREAD or equivalent is

+	 * not guaranteed to detect a broken connection.

+	 */

+	if (!pend && !dpy->qlen && ++dpy->conn_checker >= XCONN_CHECK_FREQ)

+	{

+	    int	result;

+#ifdef USE_POLL

+	    struct pollfd filedes;

+#else

+	    fd_set r_mask;

+	    static struct timeval zero_time;

+#endif

+

+	    dpy->conn_checker = 0;

+#ifdef USE_POLL

+	    filedes.fd = dpy->fd;

+	    filedes.events = POLLIN;

+	    if ((result = poll(&filedes, 1, 0)))

+#else

+	    FD_ZERO(&r_mask);

+	    FD_SET(dpy->fd, &r_mask);

+	    if ((result = Select(dpy->fd + 1, &r_mask, NULL, NULL, &zero_time)))

+#endif

+	    {

+		if (result > 0)

+		{

+		    if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)

+			_XIOError(dpy);

+		    /* we should not get zero, if we do, force a read */

+		    if (!pend)

+			pend = SIZEOF(xReply);

+		}

+		else if (result < 0 && !(ECHECK(EINTR) || ETEST()))

+		    _XIOError(dpy);

+	    }

+	}

+#endif /* XCONN_CHECK_FREQ */

+	if (!(len = pend)) {

+	    /* _XFlush can enqueue events */

+#ifdef XTHREADS

+	    if (cvl)

+#endif

+	    {

+		UnlockNextEventReader(dpy);

+	    }

+	    return(dpy->qlen);

+	}

+      /* Force a read if there is not enough data.  Otherwise,

+       * a select() loop at a higher-level will spin undesirably,

+       * and we've seen at least one OS that appears to not update

+       * the result from FIONREAD once it has returned nonzero.

+       */

+#ifdef XTHREADS

+	if (dpy->lock && dpy->lock->reply_awaiters) {

+	    read_buf = (char *)dpy->lock->reply_awaiters->buf;

+	    len = SIZEOF(xReply);

+	} else

+#endif /* XTHREADS*/

+	{

+	    read_buf = buf.buf;

+

+	    if (len < SIZEOF(xReply)

+#ifdef XTHREADS

+		|| dpy->async_handlers

+#endif

+		)

+		len = SIZEOF(xReply);

+	    else if (len > BUFSIZE)

+		len = BUFSIZE;

+	    len = (len / SIZEOF(xReply)) * SIZEOF(xReply);

+	}

+#ifdef XCONN_CHECK_FREQ

+	dpy->conn_checker = 0;

+#endif

+

+	(void) _XRead (dpy, read_buf, (long) len);

+

+#ifdef XTHREADS

+	/* what did we actually read: reply or event? */

+	if (dpy->lock && dpy->lock->reply_awaiters) {

+	    if (((xReply *)read_buf)->generic.type == X_Reply ||

+		((xReply *)read_buf)->generic.type == X_Error)

+	    {

+		dpy->lock->reply_was_read = True;

+		dpy->lock->reply_first = True;

+		if (read_buf != (char *)dpy->lock->reply_awaiters->buf)

+		    memcpy(dpy->lock->reply_awaiters->buf, read_buf,

+			   len);

+		if (cvl) {

+		    UnlockNextEventReader(dpy);

+		}

+		return(dpy->qlen); /* we read, so we can return */

+	    } else if (read_buf != buf.buf)

+		memcpy(buf.buf, read_buf, len);

+	}

+#endif /* XTHREADS*/

+

+	STARTITERATE(rep,xReply,buf.buf,len > 0) {

+	    if (rep->generic.type == X_Reply) {

+                int tmp = len;

+		RESETITERPTR(rep,xReply,

+			     _XAsyncReply (dpy, rep,

+					   ITERPTR(rep), &tmp, True));

+                len = tmp;

+		pend = len;

+	    } else {

+		if (rep->generic.type == X_Error)

+		    _XError (dpy, (xError *)rep);

+		else   /* must be an event packet */

+		    _XEnq (dpy, (xEvent *)rep);

+		INCITERPTR(rep,xReply);

+		len -= SIZEOF(xReply);

+	    }

+	} ENDITERATE

+

+#ifdef XTHREADS

+	if (cvl)

+#endif

+	{

+	    UnlockNextEventReader(dpy);

+	}

+	return(dpy->qlen);

+}

+

+/* _XReadEvents - Flush the output queue,

+ * then read as many events as possible (but at least 1) and enqueue them

+ */

+void _XReadEvents(

+	register Display *dpy)

+{

+	_XAlignedBuffer buf;

+	BytesReadable_t pend;

+	int len;

+	register xReply *rep;

+	Bool not_yet_flushed = True;

+	char *read_buf;

+	int i;

+	int entry_event_serial_num = dpy->next_event_serial_num;

+#ifdef XTHREADS

+	struct _XCVList *cvl = NULL;

+	xthread_t self;

+

+#ifdef XTHREADS_DEBUG

+	printf("_XReadEvents called in thread %x\n",

+	       XThread_Self());

+#endif

+	/* create our condition variable and append to list,

+	 * unless we were called from within XProcessInternalConnection

+	 * or XLockDisplay

+	 */

+	xthread_clear_id(self);

+	if (dpy->lock && (xthread_have_id (dpy->lock->conni_thread)

+			  || xthread_have_id (dpy->lock->locking_thread)))

+	    /* some thread is in XProcessInternalConnection or XLockDisplay

+	       so we have to see if we are it */

+	    self = XThread_Self();

+	if (!xthread_have_id(self)

+	    || (!xthread_equal(self, dpy->lock->conni_thread)

+		&& !xthread_equal(self, dpy->lock->locking_thread)))

+	    cvl = QueueEventReaderLock(dpy);

+#endif /* XTHREADS */

+

+	do {

+#ifdef XTHREADS

+	    /* if it is not our turn to read an event off the wire,

+	       wait til we're at head of list */

+	    if (dpy->lock && cvl &&

+		(dpy->lock->event_awaiters != cvl ||

+		 dpy->lock->reply_first)) {

+		ConditionWait(dpy, cvl->cv);

+		continue;

+	    }

+#endif /* XTHREADS */

+	    /* find out how much data can be read */

+	    if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)

+	    	_XIOError(dpy);

+	    len = pend;

+

+	    /* must read at least one xEvent; if none is pending, then

+	       we'll just flush and block waiting for it */

+	    if (len < SIZEOF(xEvent)

+#ifdef XTHREADS

+		|| dpy->async_handlers

+#endif

+		) {

+	    	len = SIZEOF(xEvent);

+		/* don't flush until the first time we would block */

+		if (not_yet_flushed) {

+		    _XFlush (dpy);

+		    if (_XNewerQueuedEvent(dpy, entry_event_serial_num)) {

+			/* _XReply has read an event for us */

+			goto got_event;

+		    }

+		    not_yet_flushed = False;

+		}

+	    }

+

+#ifdef XTHREADS

+	    /* If someone is waiting for a reply, gamble that

+	       the reply will be the next thing on the wire

+	       and read it into their buffer. */

+	    if (dpy->lock && dpy->lock->reply_awaiters) {

+		read_buf = (char *)dpy->lock->reply_awaiters->buf;

+		len = SIZEOF(xReply);

+	    } else

+#endif /* XTHREADS*/

+	    {

+		read_buf = buf.buf;

+

+		/* but we won't read more than the max buffer size */

+		if (len > BUFSIZE)

+		    len = BUFSIZE;

+

+		/* round down to an integral number of XReps */

+		len = (len / SIZEOF(xEvent)) * SIZEOF(xEvent);

+	    }

+

+#ifdef XTHREADS

+	    if (xthread_have_id(self))

+		/* save value we may have to stick in conni_thread */

+		dpy->lock->reading_thread = self;

+#endif /* XTHREADS */

+	    dpy->flags |= XlibDisplayReadEvents;

+	    i = _XRead (dpy, read_buf, (long) len);

+	    dpy->flags &= ~XlibDisplayReadEvents;

+	    if (i == -2) {

+		/* special flag from _XRead to say that internal connection has

+		   done XPutBackEvent.  Which we can use so we're done. */

+	      got_event:

+#ifdef XTHREADS

+		if (dpy->lock && dpy->lock->lock_wait) {

+		    if (dpy->lock->event_awaiters != cvl)

+			/* since it is not us, must be user lock thread */

+			ConditionSignal(dpy,

+					dpy->lock->event_awaiters->cv);

+		    (*dpy->lock->lock_wait)(dpy);

+		    continue;

+		}

+#endif

+		break;

+	    }

+#ifdef XTHREADS

+	    if (xthread_have_id(self))

+		xthread_clear_id(dpy->lock->reading_thread);

+

+	    /* what did we actually read: reply or event? */

+	    if (dpy->lock && dpy->lock->reply_awaiters) {

+		if (((xReply *)read_buf)->generic.type == X_Reply ||

+		    ((xReply *)read_buf)->generic.type == X_Error)

+		{

+		    dpy->lock->reply_was_read = True;

+		    dpy->lock->reply_first = True;

+		    if (read_buf != (char *)dpy->lock->reply_awaiters->buf)

+			memcpy(dpy->lock->reply_awaiters->buf,

+			       read_buf, len);

+		    ConditionSignal(dpy, dpy->lock->reply_awaiters->cv);

+		    continue;

+		} else if (read_buf != buf.buf)

+		    memcpy(buf.buf, read_buf, len);

+	    }

+#endif /* XTHREADS */

+

+	    STARTITERATE(rep,xReply,buf.buf,len > 0) {

+		if (rep->generic.type == X_Reply) {

+		    RESETITERPTR(rep,xReply,

+				 _XAsyncReply (dpy, rep,

+					       ITERPTR(rep), &len, True));

+		    pend = len;

+		} else {

+		    if (rep->generic.type == X_Error)

+			_XError (dpy, (xError *) rep);

+		    else   /* must be an event packet */

+                    {

+                        if (rep->generic.type == GenericEvent)

+                        {

+                            int evlen;

+                            evlen = (rep->generic.length << 2);

+                            if (_XRead(dpy, &read_buf[len], evlen) == -2)

+                                goto got_event; /* XXX: aargh! */

+                        }

+

+                        _XEnq (dpy, (xEvent *)rep);

+                    }

+		    INCITERPTR(rep,xReply);

+		    len -= SIZEOF(xReply);

+		}

+	    } ENDITERATE;

+	} while (!_XNewerQueuedEvent(dpy, entry_event_serial_num));

+

+	UnlockNextEventReader(dpy);

+}

+

+/*

+ * _XRead - Read bytes from the socket taking into account incomplete

+ * reads.  This routine may have to be reworked if int < long.

+ */

+int _XRead(

+	register Display *dpy,

+	register char *data,

+	register long size)

+{

+	register long bytes_read;

+#ifdef XTHREADS

+	int original_size = size;

+#endif

+

+	if ((dpy->flags & XlibDisplayIOError) || size == 0)

+	    return 0;

+	ESET(0);

+	while ((bytes_read = _X11TransRead(dpy->trans_conn, data, (int)size))

+		!= size) {

+

+	    	if (bytes_read > 0) {

+		    size -= bytes_read;

+		    data += bytes_read;

+		    }

+		else if (ETEST()) {

+		    if (_XWaitForReadable(dpy) == -2)

+			return -2; /* internal connection did XPutBackEvent */

+		    ESET(0);

+		}

+#ifdef SUNSYSV

+		else if (ECHECK(0)) {

+		    if (_XWaitForReadable(dpy) == -2)

+			return -2; /* internal connection did XPutBackEvent */

+		}

+#endif

+		else if (bytes_read == 0) {

+		    /* Read failed because of end of file! */

+		    ESET(EPIPE);

+		    _XIOError(dpy);

+		    }

+

+		else  /* bytes_read is less than 0; presumably -1 */ {

+		    /* If it's a system call interrupt, it's not an error. */

+		    if (!ECHECK(EINTR))

+		    	_XIOError(dpy);

+		    }

+	    	 }

+#ifdef XTHREADS

+       if (dpy->lock && dpy->lock->reply_bytes_left > 0)

+       {

+           dpy->lock->reply_bytes_left -= original_size;

+           if (dpy->lock->reply_bytes_left == 0) {

+	       dpy->flags &= ~XlibDisplayReply;

+               UnlockNextReplyReader(dpy);

+	   }

+       }

+#endif /* XTHREADS*/

+	return 0;

+}

+#endif /* !USE_XCB */

+

+#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 */

+

+

+#if !USE_XCB

+/*

+ * _XReadPad - Read bytes from the socket taking into account incomplete

+ * reads.  If the number of bytes is not 0 mod 4, read additional pad

+ * bytes. This routine may have to be reworked if int < long.

+ */

+void _XReadPad(

+    	register Display *dpy,

+	register char *data,

+	register long size)

+{

+    	register long bytes_read;

+	struct iovec iov[2];

+	char pad[3];

+#ifdef XTHREADS

+        int original_size;

+#endif

+

+	if ((dpy->flags & XlibDisplayIOError) || size == 0) return;

+	iov[0].iov_len = (int)size;

+	iov[0].iov_base = data;

+	/*

+	 * The following hack is used to provide 32 bit long-word

+	 * aligned padding.  The [1] vector is of length 0, 1, 2, or 3,

+	 * whatever is needed.

+	 */

+

+	iov[1].iov_len = -size & 3;

+	iov[1].iov_base = pad;

+	size += iov[1].iov_len;

+#ifdef XTHREADS

+	original_size = size;

+#endif

+	ESET(0);

+	while ((bytes_read = _X11TransReadv (dpy->trans_conn, iov, 2)) != size) {

+

+	    if (bytes_read > 0) {

+		size -= bytes_read;

+		if (iov[0].iov_len < bytes_read) {

+		    int pad_bytes_read = bytes_read - iov[0].iov_len;

+		    iov[1].iov_len -= pad_bytes_read;

+		    iov[1].iov_base =

+			(char *)iov[1].iov_base + pad_bytes_read;

+		    iov[0].iov_len = 0;

+		    }

+	    	else {

+		    iov[0].iov_len -= bytes_read;

+	    	    iov[0].iov_base = (char *)iov[0].iov_base + bytes_read;

+	    	}

+	    }

+	    else if (ETEST()) {

+		_XWaitForReadable(dpy);

+		ESET(0);

+	    }

+#ifdef SUNSYSV

+	    else if (ECHECK(0)) {

+		_XWaitForReadable(dpy);

+	    }

+#endif

+	    else if (bytes_read == 0) {

+		/* Read failed because of end of file! */

+		ESET(EPIPE);

+		_XIOError(dpy);

+		}

+

+	    else  /* bytes_read is less than 0; presumably -1 */ {

+		/* If it's a system call interrupt, it's not an error. */

+		if (!ECHECK(EINTR))

+		    _XIOError(dpy);

+		}

+	    }

+#ifdef XTHREADS

+       if (dpy->lock && dpy->lock->reply_bytes_left > 0)

+       {

+           dpy->lock->reply_bytes_left -= original_size;

+           if (dpy->lock->reply_bytes_left == 0) {

+	       dpy->flags &= ~XlibDisplayReply;

+               UnlockNextReplyReader(dpy);

+	   }

+       }

+#endif /* XTHREADS*/

+}

+

+/*

+ * _XSend - Flush the buffer and send the client data. 32 bit word aligned

+ * transmission is used, if size is not 0 mod 4, extra bytes are transmitted.

+ * This routine may have to be reworked if int < long;

+ */

+void

+_XSend (

+	register Display *dpy,

+	_Xconst char *data,

+	register long size)

+{

+	struct iovec iov[3];

+	static char const pad[3] = {0, 0, 0};

+           /* XText8 and XText16 require that the padding bytes be zero! */

+

+	long skip, dbufsize, padsize, total, todo;

+	_XExtension *ext;

+

+	if (!size || (dpy->flags & XlibDisplayIOError)) return;

+	dbufsize = dpy->bufptr - dpy->buffer;

+#ifdef XTHREADS

+	dpy->flags |= XlibDisplayWriting;

+	/* make sure no one else can put in data */

+	dpy->bufptr = dpy->bufmax;

+#endif

+	padsize = -size & 3;

+	for (ext = dpy->flushes; ext; ext = ext->next_flush) {

+	    (*ext->before_flush)(dpy, &ext->codes, dpy->buffer, dbufsize);

+	    (*ext->before_flush)(dpy, &ext->codes, (char *)data, size);

+	    if (padsize)

+		(*ext->before_flush)(dpy, &ext->codes, pad, padsize);

+	}

+	skip = 0;

+	todo = total = dbufsize + size + padsize;

+

+	/*

+	 * There are 3 pieces that may need to be written out:

+	 *

+	 *     o  whatever is in the display buffer

+	 *     o  the data passed in by the user

+	 *     o  any padding needed to 32bit align the whole mess

+	 *

+	 * This loop looks at all 3 pieces each time through.  It uses skip

+	 * to figure out whether or not a given piece is needed.

+	 */

+	while (total) {

+	    long before = skip;		/* amount of whole thing written */

+	    long remain = todo;		/* amount to try this time, <= total */

+	    int i = 0;

+	    long len;

+

+	    /* You could be very general here and have "in" and "out" iovecs

+	     * and write a loop without using a macro, but what the heck.  This

+	     * translates to:

+	     *

+	     *     how much of this piece is new?

+	     *     if more new then we are trying this time, clamp

+	     *     if nothing new

+	     *         then bump down amount already written, for next piece

+	     *         else put new stuff in iovec, will need all of next piece

+	     *

+	     * Note that todo had better be at least 1 or else we'll end up

+	     * writing 0 iovecs.

+	     */

+#define InsertIOV(pointer, length) \

+	    len = (length) - before; \

+	    if (len > remain) \

+		len = remain; \

+	    if (len <= 0) { \

+		before = (-len); \

+	    } else { \

+		iov[i].iov_len = len; \

+		iov[i].iov_base = (pointer) + before; \

+		i++; \

+		remain -= len; \

+		before = 0; \

+	    }

+

+	    InsertIOV (dpy->buffer, dbufsize)

+	    InsertIOV ((char *)data, size)

+	    InsertIOV ((char *)pad, padsize)

+

+	    ESET(0);

+	    if ((len = _X11TransWritev(dpy->trans_conn, iov, i)) >= 0) {

+		skip += len;

+		total -= len;

+		todo = total;

+	    } else if (ETEST()) {

+		_XWaitForWritable(dpy

+#ifdef XTHREADS

+				  , NULL

+#endif

+				  );

+#ifdef SUNSYSV

+	    } else if (ECHECK(0)) {

+		_XWaitForWritable(dpy

+#ifdef XTHREADS

+				  , NULL

+#endif

+				  );

+#endif

+#ifdef ESZTEST

+	    } else if (ESZTEST()) {

+		if (todo > 1)

+		  todo >>= 1;

+		else {

+		    _XWaitForWritable(dpy

+#ifdef XTHREADS

+				      , NULL

+#endif

+				      );

+		}

+#endif

+	    } else if (!ECHECK(EINTR)) {

+		_XIOError(dpy);

+	    }

+	}

+	dpy->last_req = (char *) & _dummy_request;

+	_XSetSeqSyncFunction(dpy);

+	dpy->bufptr = dpy->buffer;

+#ifdef XTHREADS

+	dpy->flags &= ~XlibDisplayWriting;

+#endif

+	return;

+}

+

+static void

+_XGetMiscCode(

+    register Display *dpy)

+{

+    xQueryExtensionReply qrep;

+    register xQueryExtensionReq *qreq;

+    xXCMiscGetVersionReply vrep;

+    register xXCMiscGetVersionReq *vreq;

+

+    if (dpy->xcmisc_opcode)

+	return;

+    GetReq(QueryExtension, qreq);

+    qreq->nbytes = sizeof(XCMiscExtensionName) - 1;

+    qreq->length += (qreq->nbytes+(unsigned)3)>>2;

+    _XSend(dpy, XCMiscExtensionName, (long)qreq->nbytes);

+    if (!_XReply (dpy, (xReply *)&qrep, 0, xTrue))

+	dpy->xcmisc_opcode = -1;

+    else {

+	GetReq(XCMiscGetVersion, vreq);

+	vreq->reqType = qrep.major_opcode;

+	vreq->miscReqType = X_XCMiscGetVersion;

+	vreq->majorVersion = XCMiscMajorVersion;

+	vreq->minorVersion = XCMiscMinorVersion;

+	if (!_XReply (dpy, (xReply *)&vrep, 0, xTrue))

+	    dpy->xcmisc_opcode = -1;

+	else

+	    dpy->xcmisc_opcode = qrep.major_opcode;

+    }

+}

+

+void

+_XIDHandler(

+    register Display *dpy)

+{

+    xXCMiscGetXIDRangeReply grep;

+    register xXCMiscGetXIDRangeReq *greq;

+

+    if (dpy->resource_max == dpy->resource_mask + 1) {

+	_XGetMiscCode(dpy);

+	if (dpy->xcmisc_opcode > 0) {

+	    GetReq(XCMiscGetXIDRange, greq);

+	    greq->reqType = dpy->xcmisc_opcode;

+	    greq->miscReqType = X_XCMiscGetXIDRange;

+	    if (_XReply (dpy, (xReply *)&grep, 0, xTrue) && grep.count) {

+		dpy->resource_id = ((grep.start_id - dpy->resource_base) >>

+				    dpy->resource_shift);

+		dpy->resource_max = dpy->resource_id;

+		if (grep.count > 5)

+		    dpy->resource_max += grep.count - 6;

+		dpy->resource_max <<= dpy->resource_shift;

+	    }

+	    sync_while_locked(dpy);

+	}

+    }

+}

+

+/*

+ * _XAllocID - resource ID allocation routine.

+ */

+XID _XAllocID(

+    register Display *dpy)

+{

+   XID id;

+

+   id = dpy->resource_id << dpy->resource_shift;

+   if (id >= dpy->resource_max) {

+	_XSetPrivSyncFunction(dpy);

+       dpy->resource_max = dpy->resource_mask + 1;

+   }

+   if (id <= dpy->resource_mask) {

+       dpy->resource_id++;

+       return (dpy->resource_base + id);

+   }

+   if (id != 0x10000000) {

+       (void) fprintf(stderr,

+		      "Xlib: resource ID allocation space exhausted!\n");

+       id = 0x10000000;

+       dpy->resource_id = id >> dpy->resource_shift;

+   }

+   return id;

+}

+

+/*

+ * _XAllocIDs - multiple resource ID allocation routine.

+ */

+void _XAllocIDs(

+    register Display *dpy,

+    XID *ids,

+    int count)

+{

+    XID id;

+    int i;

+    xXCMiscGetXIDListReply grep;

+    register xXCMiscGetXIDListReq *greq;

+

+    id = dpy->resource_id << dpy->resource_shift;

+    if (dpy->resource_max <= dpy->resource_mask &&

+	id <= dpy->resource_mask &&

+	(dpy->resource_max - id) > ((count - 1) << dpy->resource_shift)) {

+	id += dpy->resource_base;

+	for (i = 0; i < count; i++) {

+	    ids[i] = id;

+	    id += (1 << dpy->resource_shift);

+	    dpy->resource_id++;

+	}

+	return;

+    }

+    grep.count = 0;

+    _XGetMiscCode(dpy);

+    if (dpy->xcmisc_opcode > 0) {

+	GetReq(XCMiscGetXIDList, greq);

+	greq->reqType = dpy->xcmisc_opcode;

+	greq->miscReqType = X_XCMiscGetXIDList;

+	greq->count = count;

+	if (_XReply(dpy, (xReply *)&grep, 0, xFalse) && grep.count) {

+	    _XRead32(dpy, (long *) ids, 4L * (long) (grep.count));

+	    for (i = 0; i < grep.count; i++) {

+		id = (ids[i] - dpy->resource_base) >> dpy->resource_shift;

+		if (id >= dpy->resource_id)

+		    dpy->resource_id = id;

+	    }

+	    if (id >= dpy->resource_max) {

+		_XSetPrivSyncFunction(dpy);

+		dpy->resource_max = dpy->resource_mask + 1;

+	    }

+	}

+    }

+    for (i = grep.count; i < count; i++)

+	ids[i] = XAllocID(dpy);

+}

+#endif /* !USE_XCB */

+

+/*

+ * 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);

+}

+

+#if !USE_XCB

+/*

+ * _XReply - Wait for a reply packet and copy its contents into the

+ * specified rep.  Meanwhile we must handle error and event packets that

+ * we may encounter.

+ */

+Status

+_XReply (

+    register Display *dpy,

+    register xReply *rep,

+    int extra,		/* number of 32-bit words expected after the reply */

+    Bool discard)	/* should I discard data following "extra" words? */

+{

+    /* Pull out the serial number now, so that (currently illegal) requests

+     * generated by an error handler don't confuse us.

+     */

+    unsigned long cur_request = dpy->request;

+#ifdef XTHREADS

+    struct _XCVList *cvl;

+#endif

+

+    if (dpy->flags & XlibDisplayIOError)

+	return 0;

+

+#ifdef XTHREADS

+    /* create our condition variable and append to list */

+    cvl = QueueReplyReaderLock(dpy);

+    if (cvl) {

+	cvl->buf = rep;

+	if (dpy->lock->reply_awaiters == cvl && !dpy->lock->event_awaiters)

+	    dpy->lock->reply_first = True;

+    }

+

+#ifdef XTHREADS_DEBUG

+    printf("_XReply called in thread %x, adding %x to cvl\n",

+	   XThread_Self(), cvl);

+#endif

+

+    _XFlushInt(dpy, cvl ? cvl->cv : NULL);

+    /* if it is not our turn to read a reply off the wire,

+     * wait til we're at head of list.  if there is an event waiter,

+     * and our reply hasn't been read, they'll be in select and will

+     * hand control back to us next.

+     */

+    if(dpy->lock &&

+       (dpy->lock->reply_awaiters != cvl || !dpy->lock->reply_first)) {

+	ConditionWait(dpy, cvl->cv);

+    }

+    dpy->flags |= XlibDisplayReply;

+#else /* XTHREADS else */

+    _XFlush(dpy);

+#endif

+

+    for (;;) {

+#ifdef XTHREADS

+	/* Did another thread's _XReadEvents get our reply by accident? */

+	if (!dpy->lock || !dpy->lock->reply_was_read)

+#endif

+	    (void) _XRead(dpy, (char *)rep, (long)SIZEOF(xReply));

+#ifdef XTHREADS

+	if (dpy->lock)

+	    dpy->lock->reply_was_read = False;

+#endif

+

+	switch ((int)rep->generic.type) {

+

+	    case X_Reply:

+	        /* Reply received.  Fast update for synchronous replies,

+		 * but deal with multiple outstanding replies.

+		 */

+	        if (rep->generic.sequenceNumber == (cur_request & 0xffff))

+		    dpy->last_request_read = cur_request;

+		else {

+		    int pend = SIZEOF(xReply);

+		    if (_XAsyncReply(dpy, rep, (char *)rep, &pend, False)

+			!= (char *)rep)

+			continue;

+		}

+		if (extra <= rep->generic.length) {

+		    if (extra > 0)

+			/*

+			 * Read the extra data into storage immediately

+			 * following the GenericReply structure.

+			 */

+			(void) _XRead (dpy, (char *) (NEXTPTR(rep,xReply)),

+				((long)extra) << 2);

+		    if (discard) {

+			if (extra < rep->generic.length)

+			    _XEatData(dpy, (rep->generic.length - extra) << 2);

+		    }

+#ifdef XTHREADS

+		    if (dpy->lock) {

+			if (discard) {

+			    dpy->lock->reply_bytes_left = 0;

+			} else {

+			    dpy->lock->reply_bytes_left =

+				(rep->generic.length - extra) << 2;

+			}

+			if (dpy->lock->reply_bytes_left == 0) {

+			    dpy->flags &= ~XlibDisplayReply;

+			    UnlockNextReplyReader(dpy);

+			}

+		    } else

+			dpy->flags &= ~XlibDisplayReply;

+#endif

+		    return 1;

+		}

+		/*

+		 *if we get here, then extra > rep->generic.length--meaning we

+		 * read a reply that's shorter than we expected.  This is an

+		 * error,  but we still need to figure out how to handle it...

+		 */

+		(void) _XRead (dpy, (char *) (NEXTPTR(rep,xReply)),

+			((long) rep->generic.length) << 2);

+		dpy->flags &= ~XlibDisplayReply;

+		UnlockNextReplyReader(dpy);

+		_XIOError (dpy);

+		return (0);

+

+    	    case X_Error:

+	    	{

+	        register _XExtension *ext;

+		register Bool ret = False;

+		int ret_code;

+		xError *err = (xError *) rep;

+		unsigned long serial;

+

+		dpy->flags &= ~XlibDisplayReply;

+		serial = _XSetLastRequestRead(dpy, (xGenericReply *)rep);

+		if (serial == cur_request)

+			/* do not die on "no such font", "can't allocate",

+			   "can't grab" failures */

+			switch ((int)err->errorCode) {

+			case BadName:

+			    switch (err->majorCode) {

+				case X_LookupColor:

+				case X_AllocNamedColor:

+				    UnlockNextReplyReader(dpy);

+				    return(0);

+			    }

+			    break;

+			case BadFont:

+			    if (err->majorCode == X_QueryFont) {

+				UnlockNextReplyReader(dpy);

+				return (0);

+			    }

+			    break;

+			case BadAlloc:

+			case BadAccess:

+			    UnlockNextReplyReader(dpy);

+			    return (0);

+			}

+		/*

+		 * we better see if there is an extension who may

+		 * want to suppress the error.

+		 */

+		for (ext = dpy->ext_procs; !ret && ext; ext = ext->next) {

+		    if (ext->error)

+		       ret = (*ext->error)(dpy, err, &ext->codes, &ret_code);

+		}

+		if (!ret) {

+		    _XError(dpy, err);

+		    ret_code = 0;

+		}

+		if (serial == cur_request) {

+		    UnlockNextReplyReader(dpy);

+		    return(ret_code);

+		}

+

+		} /* case X_Error */

+		break;

+	    default:

+		_XEnq(dpy, (xEvent *) rep);

+#ifdef XTHREADS

+		if (dpy->lock && dpy->lock->event_awaiters)

+		    ConditionSignal(dpy, dpy->lock->event_awaiters->cv);

+#endif

+		break;

+	    }

+	}

+}

+

+static char *

+_XAsyncReply(

+    Display *dpy,

+    register xReply *rep,

+    char *buf,

+    register int *lenp,

+    Bool discard)

+{

+    register _XAsyncHandler *async, *next;

+    register int len;

+    register Bool consumed = False;

+    char *nbuf;

+

+    (void) _XSetLastRequestRead(dpy, &rep->generic);

+    len = SIZEOF(xReply) + (rep->generic.length << 2);

+    if (len < SIZEOF(xReply)) {

+	_XIOError (dpy);

+	buf += *lenp;

+	*lenp = 0;

+	return buf;

+    }

+

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

+	next = async->next;

+	if ((consumed = (*async->handler)(dpy, rep, buf, *lenp, async->data)))

+	    break;

+    }

+    if (!consumed) {

+	if (!discard)

+	    return buf;

+	(void) fprintf(stderr,

+		       "Xlib: unexpected async reply (sequence 0x%lx)!\n",

+		       dpy->last_request_read);

+#ifdef XTHREADS

+#ifdef XTHREADS_DEBUG

+	printf("thread %x, unexpected async reply\n", XThread_Self());

+#endif

+#endif

+	if (len > *lenp)

+	    _XEatData(dpy, len - *lenp);

+    }

+    if (len < SIZEOF(xReply))

+    {

+	_XIOError (dpy);

+	buf += *lenp;

+	*lenp = 0;

+	return buf;

+    }

+    if (len >= *lenp) {

+	buf += *lenp;

+	*lenp = 0;

+	return buf;

+    }

+    *lenp -= len;

+    buf += len;

+    len = *lenp;

+    nbuf = buf;

+    while (len > SIZEOF(xReply)) {

+	if (*buf == X_Reply)

+	    return nbuf;

+	buf += SIZEOF(xReply);

+	len -= SIZEOF(xReply);

+    }

+    if (len > 0 && len < SIZEOF(xReply)) {

+	buf = nbuf;

+	len = SIZEOF(xReply) - len;

+	nbuf -= len;

+	memmove(nbuf, buf, *lenp);

+	(void) _XRead(dpy, nbuf + *lenp, (long)len);

+	*lenp += len;

+    }

+    return nbuf;

+}

+#endif /* !USE_XCB */

+

+/*

+ * 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;

+#if defined(XTHREADS) && !USE_XCB

+    if (dpy->lock) {

+	/* check cache to avoid call to thread_self */

+	if (xthread_have_id(dpy->lock->reading_thread))

+	    dpy->lock->conni_thread = dpy->lock->reading_thread;

+	else

+	    dpy->lock->conni_thread = XThread_Self();

+    }

+#endif /* XTHREADS && !USE_XCB */

+    UnlockDisplay(dpy);

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

+    LockDisplay(dpy);

+#if defined(XTHREADS) && !USE_XCB

+    if (dpy->lock)

+	xthread_clear_id(dpy->lock->conni_thread);

+#endif /* XTHREADS && !USE_XCB */

+    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 */

+

+

+#if !USE_XCB

+/* Read and discard "n" 8-bit bytes of data */

+

+void _XEatData(

+    Display *dpy,

+    register unsigned long n)

+{

+#define SCRATCHSIZE 2048

+    char buf[SCRATCHSIZE];

+

+    while (n > 0) {

+	register long bytes_read = (n > SCRATCHSIZE) ? SCRATCHSIZE : n;

+	(void) _XRead (dpy, buf, bytes_read);

+	n -= bytes_read;

+    }

+#undef SCRATCHSIZE

+}

+#endif /* !USE_XCB */

+

+/* 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;

+	/* 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) {

+	int rtn_val;

+#if defined(XTHREADS) && !USE_XCB

+	if (dpy->lock)

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

+	UnlockDisplay(dpy);

+#endif /* XTHREADS && !USE_XCB */

+	rtn_val = (*_XErrorFunction)(dpy, (XErrorEvent *)&event); /* upcall */

+#if defined(XTHREADS) && !USE_XCB

+	LockDisplay(dpy);

+	if (dpy->lock)

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

+#endif /* XTHREADS && !USE_XCB */

+	return rtn_val;

+    } 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