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dispatch.c

/* $Xorg: dispatch.c,v 1.5 2001/02/09 02:04:40 xorgcvs Exp $ */
/************************************************************

Copyright 1987, 1989, 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.


Copyright 1987, 1989 by Digital Equipment Corporation, Maynard, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the name of Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

********************************************************/

/* The panoramix components contained the following notice */
/****************************************************************
*                                                               *
*    Copyright (c) Digital Equipment Corporation, 1991, 1997    *
*                                                               *
*   All Rights Reserved.  Unpublished rights  reserved  under   *
*   the copyright laws of the United States.                    *
*                                                               *
*   The software contained on this media  is  proprietary  to   *
*   and  embodies  the  confidential  technology  of  Digital   *
*   Equipment Corporation.  Possession, use,  duplication  or   *
*   dissemination of the software and media is authorized only  *
*   pursuant to a valid written license from Digital Equipment  *
*   Corporation.                                                *
*                                                               *
*   RESTRICTED RIGHTS LEGEND   Use, duplication, or disclosure  *
*   by the U.S. Government is subject to restrictions  as  set  *
*   forth in Subparagraph (c)(1)(ii)  of  DFARS  252.227-7013,  *
*   or  in  FAR 52.227-19, as applicable.                       *
*                                                               *
*****************************************************************/

/* $XFree86: xc/programs/Xserver/dix/dispatch.c,v 3.29 2003/01/12 02:44:26 dawes Exp $ */

#ifdef PANORAMIX_DEBUG
#include <stdio.h>
int ProcInitialConnection();
#endif

#include "windowstr.h"
#include "fontstruct.h"
#include "dixfontstr.h"
#include "gcstruct.h"
#include "selection.h"
#include "colormapst.h"
#include "cursorstr.h"
#include "scrnintstr.h"
#include "opaque.h"
#include "input.h"
#include "servermd.h"
#include "extnsionst.h"
#include "dixfont.h"
#include "dispatch.h"
#include "swaprep.h"
#include "swapreq.h"
#ifdef PANORAMIX
#include "panoramiX.h"
#include "panoramiXsrv.h"
#endif
#ifdef XCSECURITY
#define _SECURITY_SERVER
#include "security.h"
#endif
#ifdef XAPPGROUP
#include "Xagsrv.h"
#endif
#ifdef XKB
#define XKB_IN_SERVER
#include "inputstr.h"
#include "XKBsrv.h"
#endif
#ifdef LBX
#include "lbxserve.h"
#endif

#define mskcnt ((MAXCLIENTS + 31) / 32)
#define BITMASK(i) (1U << ((i) & 31))
#define MASKIDX(i) ((i) >> 5)
#define MASKWORD(buf, i) buf[MASKIDX(i)]
#define BITSET(buf, i) MASKWORD(buf, i) |= BITMASK(i)
#define BITCLEAR(buf, i) MASKWORD(buf, i) &= ~BITMASK(i)
#define GETBIT(buf, i) (MASKWORD(buf, i) & BITMASK(i))

extern xConnSetupPrefix connSetupPrefix;
extern char *ConnectionInfo;

Selection *CurrentSelections;
int NumCurrentSelections;

static ClientPtr grabClient;
#define GrabNone 0
#define GrabActive 1
#define GrabKickout 2
static int grabState = GrabNone;
static long grabWaiters[mskcnt];
CallbackListPtr ServerGrabCallback = NULL;
HWEventQueuePtr checkForInput[2];
extern int connBlockScreenStart;

static void KillAllClients(
#if NeedFunctionPrototypes
    void
#endif
);

static void DeleteClientFromAnySelections(
#if NeedFunctionPrototypes
    ClientPtr /*client*/
#endif
);

static int nextFreeClientID; /* always MIN free client ID */

static int  nClients;   /* number of authorized clients */

CallbackListPtr ClientStateCallback;
char dispatchException = 0;
char isItTimeToYield;

/* Various of the DIX function interfaces were not designed to allow
 * the client->errorValue to be set on BadValue and other errors.
 * Rather than changing interfaces and breaking untold code we introduce
 * a new global that dispatch can use.
 */
XID clientErrorValue;   /* XXX this is a kludge */

#define SAME_SCREENS(a, b) (\
    (a.pScreen == b.pScreen))

void
SetInputCheck(c0, c1)
    HWEventQueuePtr c0, c1;
{
    checkForInput[0] = c0;
    checkForInput[1] = c1;
}

void
UpdateCurrentTime()
{
    TimeStamp systime;

    /* To avoid time running backwards, we must call GetTimeInMillis before
     * calling ProcessInputEvents.
     */
    systime.months = currentTime.months;
    systime.milliseconds = GetTimeInMillis();
    if (systime.milliseconds < currentTime.milliseconds)
      systime.months++;
    if (*checkForInput[0] != *checkForInput[1])
      ProcessInputEvents();
    if (CompareTimeStamps(systime, currentTime) == LATER)
      currentTime = systime;
}

/* Like UpdateCurrentTime, but can't call ProcessInputEvents */
void
UpdateCurrentTimeIf()
{
    TimeStamp systime;

    systime.months = currentTime.months;
    systime.milliseconds = GetTimeInMillis();
    if (systime.milliseconds < currentTime.milliseconds)
      systime.months++;
    if (*checkForInput[0] == *checkForInput[1])
      currentTime = systime;
}

void
InitSelections()
{
    if (CurrentSelections)
      xfree(CurrentSelections);
    CurrentSelections = (Selection *)NULL;
    NumCurrentSelections = 0;
}

void 
FlushClientCaches(id)
    XID id;
{
    int i;
    register ClientPtr client;

    client = clients[CLIENT_ID(id)];
    if (client == NullClient)
        return ;
    for (i=0; i<currentMaxClients; i++)
    {
      client = clients[i];
        if (client != NullClient)
      {
            if (client->lastDrawableID == id)
          {
            client->lastDrawableID = WindowTable[0]->drawable.id;
            client->lastDrawable = (DrawablePtr)WindowTable[0];
          }
            else if (client->lastGCID == id)
          {
                client->lastGCID = INVALID;
            client->lastGC = (GCPtr)NULL;
          }
      }
    }
}
#ifdef SMART_SCHEDULE

#undef SMART_DEBUG

#define SMART_SCHEDULE_DEFAULT_INTERVAL   20        /* ms */
#define SMART_SCHEDULE_MAX_SLICE    200       /* ms */

Bool      SmartScheduleDisable;
long      SmartScheduleSlice = SMART_SCHEDULE_DEFAULT_INTERVAL;
long      SmartScheduleInterval = SMART_SCHEDULE_DEFAULT_INTERVAL;
long      SmartScheduleMaxSlice = SMART_SCHEDULE_MAX_SLICE;
long      SmartScheduleTime;
ClientPtr   SmartLastClient;
int       SmartLastIndex[SMART_MAX_PRIORITY-SMART_MIN_PRIORITY+1];
int         SmartScheduleClient(int *clientReady, int nready);

#ifdef SMART_DEBUG
long      SmartLastPrint;
#endif

void        Dispatch(void);
void        InitProcVectors(void);

int
SmartScheduleClient (int *clientReady, int nready)
{
    ClientPtr     pClient;
    int           i;
    int           client;
    int           bestPrio, best = 0;
    int           bestRobin, robin;
    long    now = SmartScheduleTime;
    long    idle;

    bestPrio = -0x7fffffff;
    bestRobin = 0;
    idle = 2 * SmartScheduleSlice;
    for (i = 0; i < nready; i++)
    {
      client = clientReady[i];
      pClient = clients[client];
      /* Praise clients which are idle */
      if ((now - pClient->smart_check_tick) >= idle)
      {
          if (pClient->smart_priority < 0)
            pClient->smart_priority++;
      }
      pClient->smart_check_tick = now;
      
      /* check priority to select best client */
      robin = (pClient->index - SmartLastIndex[pClient->smart_priority-SMART_MIN_PRIORITY]) & 0xff;
      if (pClient->smart_priority > bestPrio ||
          (pClient->smart_priority == bestPrio && robin > bestRobin))
      {
          bestPrio = pClient->smart_priority;
          bestRobin = robin;
          best = client;
      }
#ifdef SMART_DEBUG
      if ((now - SmartLastPrint) >= 5000)
          fprintf (stderr, " %2d: %3d", client, pClient->smart_priority);
#endif
    }
#ifdef SMART_DEBUG
    if ((now - SmartLastPrint) >= 5000)
    {
      fprintf (stderr, " use %2d\n", best);
      SmartLastPrint = now;
    }
#endif
    pClient = clients[best];
    SmartLastIndex[bestPrio-SMART_MIN_PRIORITY] = pClient->index;
    /*
     * Set current client pointer
     */
    if (SmartLastClient != pClient)
    {
      pClient->smart_start_tick = now;
      SmartLastClient = pClient;
    }
    /*
     * Adjust slice
     */
    if (nready == 1)
    {
      /*
       * If it's been a long time since another client
       * has run, bump the slice up to get maximal
       * performance from a single client
       */
      if ((now - pClient->smart_start_tick) > 1000 &&
          SmartScheduleSlice < SmartScheduleMaxSlice)
      {
          SmartScheduleSlice += SmartScheduleInterval;
      }
    }
    else
    {
      SmartScheduleSlice = SmartScheduleInterval;
    }
    return best;
}
#endif

#define MAJOROP ((xReq *)client->requestBuffer)->reqType

void
Dispatch(void)
{
    register int        *clientReady;     /* array of request ready clients */
    register int  result;
    register ClientPtr  client;
    register int  nready;
    register HWEventQueuePtr* icheck = checkForInput;
#ifdef SMART_SCHEDULE
    int                 start_tick;
#endif

    nextFreeClientID = 1;
    InitSelections();
    nClients = 0;

    clientReady = (int *) ALLOCATE_LOCAL(sizeof(int) * MaxClients);
    if (!clientReady)
      return;

    while (!dispatchException)
    {
        if (*icheck[0] != *icheck[1])
      {
          ProcessInputEvents();
          FlushIfCriticalOutputPending();
      }

      nready = WaitForSomething(clientReady);

#ifdef SMART_SCHEDULE
      if (nready && !SmartScheduleDisable)
      {
          clientReady[0] = SmartScheduleClient (clientReady, nready);
          nready = 1;
      }
#endif
       /***************** 
      *  Handle events in round robin fashion, doing input between 
      *  each round 
      *****************/

      while (!dispatchException && (--nready >= 0))
      {
          client = clients[clientReady[nready]];
          if (! client)
          {
            /* KillClient can cause this to happen */
            continue;
          }
          /* GrabServer activation can cause this to be true */
          if (grabState == GrabKickout)
          {
            grabState = GrabActive;
            break;
          }
          isItTimeToYield = FALSE;
 
            requestingClient = client;
#ifdef SMART_SCHEDULE
          start_tick = SmartScheduleTime;
#endif
          while (!isItTimeToYield)
          {
              if (*icheck[0] != *icheck[1])
            {
                ProcessInputEvents();
                FlushIfCriticalOutputPending();
            }
#ifdef SMART_SCHEDULE
            if (!SmartScheduleDisable && 
                (SmartScheduleTime - start_tick) >= SmartScheduleSlice)
            {
                /* Penalize clients which consume ticks */
                if (client->smart_priority > SMART_MIN_PRIORITY)
                  client->smart_priority--;
                break;
            }
#endif
            /* now, finally, deal with client requests */

              result = ReadRequestFromClient(client);
              if (result <= 0) 
              {
                if (result < 0)
                  CloseDownClient(client);
                break;
              }

            client->sequence++;
#ifdef DEBUG
            if (client->requestLogIndex == MAX_REQUEST_LOG)
                client->requestLogIndex = 0;
            client->requestLog[client->requestLogIndex] = MAJOROP;
            client->requestLogIndex++;
#endif
            if (result > (MAX_BIG_REQUEST_SIZE << 2))
                result = BadLength;
            else
                result = (* client->requestVector[MAJOROP])(client);
          
            if (result != Success) 
            {
                if (client->noClientException != Success)
                        CloseDownClient(client);
                    else
                    SendErrorToClient(client, MAJOROP,
                                MinorOpcodeOfRequest(client),
                                client->errorValue, result);
                break;
              }
          }
          FlushAllOutput();
#ifdef SMART_SCHEDULE
          client = clients[clientReady[nready]];
          if (client)
            client->smart_stop_tick = SmartScheduleTime;
#endif
          requestingClient = NULL;
      }
      dispatchException &= ~DE_PRIORITYCHANGE;
    }
    KillAllClients();
    DEALLOCATE_LOCAL(clientReady);
    dispatchException &= ~DE_RESET;
}

#undef MAJOROP

/*ARGSUSED*/
int
ProcBadRequest(client)
    ClientPtr client;
{
    return (BadRequest);
}

int
ProcCreateWindow(client)
    register ClientPtr client;
{
    register WindowPtr pParent, pWin;
    REQUEST(xCreateWindowReq);
    int result;
    int len;

    REQUEST_AT_LEAST_SIZE(xCreateWindowReq);
    
    LEGAL_NEW_RESOURCE(stuff->wid, client);
    if (!(pParent = (WindowPtr)SecurityLookupWindow(stuff->parent, client,
                                        SecurityWriteAccess)))
        return BadWindow;
    len = client->req_len - (sizeof(xCreateWindowReq) >> 2);
    if (Ones(stuff->mask) != len)
        return BadLength;
    if (!stuff->width || !stuff->height)
    {
      client->errorValue = 0;
        return BadValue;
    }
    pWin = CreateWindow(stuff->wid, pParent, stuff->x,
                        stuff->y, stuff->width, stuff->height, 
                        stuff->borderWidth, stuff->class,
                        stuff->mask, (XID *) &stuff[1], 
                        (int)stuff->depth, 
                        client, stuff->visual, &result);
    if (pWin)
    {
      Mask mask = pWin->eventMask;

      pWin->eventMask = 0; /* subterfuge in case AddResource fails */
      if (!AddResource(stuff->wid, RT_WINDOW, (pointer)pWin))
          return BadAlloc;
      pWin->eventMask = mask;
    }
    if (client->noClientException != Success)
        return(client->noClientException);
    else
        return(result);
}

int
ProcChangeWindowAttributes(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xChangeWindowAttributesReq);
    register int result;
    int len;

    REQUEST_AT_LEAST_SIZE(xChangeWindowAttributesReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
                                 SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);
    len = client->req_len - (sizeof(xChangeWindowAttributesReq) >> 2);
    if (len != Ones(stuff->valueMask))
        return BadLength;
    result =  ChangeWindowAttributes(pWin, 
                          stuff->valueMask, 
                          (XID *) &stuff[1], 
                          client);
    if (client->noClientException != Success)
        return(client->noClientException);
    else
        return(result);
}

int
ProcGetWindowAttributes(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);
    xGetWindowAttributesReply wa;

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
                                 SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    GetWindowAttributes(pWin, client, &wa);
    WriteReplyToClient(client, sizeof(xGetWindowAttributesReply), &wa);
    return(client->noClientException);
}

int
ProcDestroyWindow(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
                                 SecurityDestroyAccess);
    if (!pWin)
        return(BadWindow);
    if (pWin->parent)
      FreeResource(stuff->id, RT_NONE);
    return(client->noClientException);
}

int
ProcDestroySubwindows(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
                                 SecurityDestroyAccess);
    if (!pWin)
        return(BadWindow);
    DestroySubwindows(pWin, client);
    return(client->noClientException);
}

int
ProcChangeSaveSet(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xChangeSaveSetReq);
    register int result;
              
    REQUEST_SIZE_MATCH(xChangeSaveSetReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
                                 SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    if (client->clientAsMask == (CLIENT_BITS(pWin->drawable.id)))
        return BadMatch;
    if ((stuff->mode == SetModeInsert) || (stuff->mode == SetModeDelete))
    {
        result = AlterSaveSetForClient(client, pWin, stuff->mode);
      if (client->noClientException != Success)
          return(client->noClientException);
      else
            return(result);
    }
    else
    {
      client->errorValue = stuff->mode;
      return( BadValue );
    }
}

int
ProcReparentWindow(client)
    register ClientPtr client;
{
    register WindowPtr pWin, pParent;
    REQUEST(xReparentWindowReq);
    register int result;

    REQUEST_SIZE_MATCH(xReparentWindowReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
                                 SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);
    pParent = (WindowPtr)SecurityLookupWindow(stuff->parent, client,
                                    SecurityWriteAccess);
    if (!pParent)
        return(BadWindow);
    if (SAME_SCREENS(pWin->drawable, pParent->drawable))
    {
        if ((pWin->backgroundState == ParentRelative) &&
            (pParent->drawable.depth != pWin->drawable.depth))
            return BadMatch;
      if ((pWin->drawable.class != InputOnly) &&
          (pParent->drawable.class == InputOnly))
          return BadMatch;
        result =  ReparentWindow(pWin, pParent, 
                   (short)stuff->x, (short)stuff->y, client);
      if (client->noClientException != Success)
            return(client->noClientException);
      else
            return(result);
    }
    else 
        return (BadMatch);
}

int
ProcMapWindow(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
                                 SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    MapWindow(pWin, client);
           /* update cache to say it is mapped */
    return(client->noClientException);
}

int
ProcMapSubwindows(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow( stuff->id, client,
                                  SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    MapSubwindows(pWin, client);
           /* update cache to say it is mapped */
    return(client->noClientException);
}

int
ProcUnmapWindow(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow( stuff->id, client,
                                  SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    UnmapWindow(pWin, FALSE);
           /* update cache to say it is mapped */
    return(client->noClientException);
}

int
ProcUnmapSubwindows(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow( stuff->id, client,
                                  SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    UnmapSubwindows(pWin);
    return(client->noClientException);
}

int
ProcConfigureWindow(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xConfigureWindowReq);
    register int result;
    int len;

    REQUEST_AT_LEAST_SIZE(xConfigureWindowReq);
    pWin = (WindowPtr)SecurityLookupWindow( stuff->window, client,
                                  SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);
    len = client->req_len - (sizeof(xConfigureWindowReq) >> 2);
    if (Ones((Mask)stuff->mask) != len)
        return BadLength;
    result =  ConfigureWindow(pWin, (Mask)stuff->mask, (XID *) &stuff[1], 
                        client);
    if (client->noClientException != Success)
        return(client->noClientException);
    else
        return(result);
}

int
ProcCirculateWindow(client)
    register ClientPtr client;
{
    register WindowPtr pWin;
    REQUEST(xCirculateWindowReq);

    REQUEST_SIZE_MATCH(xCirculateWindowReq);
    if ((stuff->direction != RaiseLowest) &&
      (stuff->direction != LowerHighest))
    {
      client->errorValue = stuff->direction;
        return BadValue;
    }
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
                                 SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);
    CirculateWindow(pWin, (int)stuff->direction, client);
    return(client->noClientException);
}

int
GetGeometry(client, rep)
    register ClientPtr client;
    xGetGeometryReply *rep;
{
    register DrawablePtr pDraw;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    SECURITY_VERIFY_GEOMETRABLE (pDraw, stuff->id, client, SecurityReadAccess);
    rep->type = X_Reply;
    rep->length = 0;
    rep->sequenceNumber = client->sequence;
    rep->root = WindowTable[pDraw->pScreen->myNum]->drawable.id;
    rep->depth = pDraw->depth;
    rep->width = pDraw->width;
    rep->height = pDraw->height;

    /* XXX - Because the pixmap-implementation of the multibuffer extension 
     *       may have the buffer-id's drawable resource value be a pointer
     *       to the buffer's window instead of the buffer itself
     *       (this happens if the buffer is the displayed buffer),
     *       we also have to check that the id matches before we can
     *       truly say that it is a DRAWABLE_WINDOW.
     */

    if ((pDraw->type == UNDRAWABLE_WINDOW) ||
        ((pDraw->type == DRAWABLE_WINDOW) && (stuff->id == pDraw->id)))
    {
        register WindowPtr pWin = (WindowPtr)pDraw;
      rep->x = pWin->origin.x - wBorderWidth (pWin);
      rep->y = pWin->origin.y - wBorderWidth (pWin);
      rep->borderWidth = pWin->borderWidth;
    }
    else /* DRAWABLE_PIXMAP or DRAWABLE_BUFFER */
    {
      rep->x = rep->y = rep->borderWidth = 0;
    }

    return Success;
}


int
ProcGetGeometry(client)
    register ClientPtr client;
{
    xGetGeometryReply rep;
    int status;

    if ((status = GetGeometry(client, &rep)) != Success)
      return status;

    WriteReplyToClient(client, sizeof(xGetGeometryReply), &rep);
    return(client->noClientException);
}


int
ProcQueryTree(client)
    register ClientPtr client;
{
    xQueryTreeReply reply;
    int numChildren = 0;
    register WindowPtr pChild, pWin, pHead;
    Window  *childIDs = (Window *)NULL;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
                                 SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    reply.type = X_Reply;
    reply.root = WindowTable[pWin->drawable.pScreen->myNum]->drawable.id;
    reply.sequenceNumber = client->sequence;
    if (pWin->parent)
      reply.parent = pWin->parent->drawable.id;
    else
        reply.parent = (Window)None;
    pHead = RealChildHead(pWin);
    for (pChild = pWin->lastChild; pChild != pHead; pChild = pChild->prevSib)
      numChildren++;
    if (numChildren)
    {
      int curChild = 0;

      childIDs = (Window *) ALLOCATE_LOCAL(numChildren * sizeof(Window));
      if (!childIDs)
          return BadAlloc;
      for (pChild = pWin->lastChild; pChild != pHead; pChild = pChild->prevSib)
          childIDs[curChild++] = pChild->drawable.id;
    }
    
    reply.nChildren = numChildren;
    reply.length = (numChildren * sizeof(Window)) >> 2;
    
    WriteReplyToClient(client, sizeof(xQueryTreeReply), &reply);
    if (numChildren)
    {
      client->pSwapReplyFunc = (ReplySwapPtr) Swap32Write;
      WriteSwappedDataToClient(client, numChildren * sizeof(Window), childIDs);
      DEALLOCATE_LOCAL(childIDs);
    }

    return(client->noClientException);
}

int
ProcInternAtom(client)
    register ClientPtr client;
{
    Atom atom;
    char *tchar;
    REQUEST(xInternAtomReq);

    REQUEST_FIXED_SIZE(xInternAtomReq, stuff->nbytes);
    if ((stuff->onlyIfExists != xTrue) && (stuff->onlyIfExists != xFalse))
    {
      client->errorValue = stuff->onlyIfExists;
        return(BadValue);
    }
    tchar = (char *) &stuff[1];
    atom = MakeAtom(tchar, stuff->nbytes, !stuff->onlyIfExists);
    if (atom != BAD_RESOURCE)
    {
      xInternAtomReply reply;
      reply.type = X_Reply;
      reply.length = 0;
      reply.sequenceNumber = client->sequence;
      reply.atom = atom;
      WriteReplyToClient(client, sizeof(xInternAtomReply), &reply);
      return(client->noClientException);
    }
    else
      return (BadAlloc);
}

int
ProcGetAtomName(client)
    register ClientPtr client;
{
    char *str;
    xGetAtomNameReply reply;
    int len;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    if ( (str = NameForAtom(stuff->id)) )
    {
      len = strlen(str);
      reply.type = X_Reply;
      reply.length = (len + 3) >> 2;
      reply.sequenceNumber = client->sequence;
      reply.nameLength = len;
      WriteReplyToClient(client, sizeof(xGetAtomNameReply), &reply);
      (void)WriteToClient(client, len, str);
      return(client->noClientException);
    }
    else 
    { 
      client->errorValue = stuff->id;
      return (BadAtom);
    }
}

#ifdef K5AUTH
extern int k5_bad();
#endif

int
ProcSetSelectionOwner(client)
    register ClientPtr client;
{
    WindowPtr pWin;
    TimeStamp time;
    REQUEST(xSetSelectionOwnerReq);

    REQUEST_SIZE_MATCH(xSetSelectionOwnerReq);
    UpdateCurrentTime();
    time = ClientTimeToServerTime(stuff->time);

    /* If the client's time stamp is in the future relative to the server's
      time stamp, do not set the selection, just return success. */
    if (CompareTimeStamps(time, currentTime) == LATER)
      return Success;
    if (stuff->window != None)
    {
        pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
                                     SecurityReadAccess);
        if (!pWin)
            return(BadWindow);
    }
    else
        pWin = (WindowPtr)None;
    if (ValidAtom(stuff->selection))
    {
      int i = 0;

      /*
       * First, see if the selection is already set... 
       */
      while ((i < NumCurrentSelections) && 
             CurrentSelections[i].selection != stuff->selection) 
            i++;
        if (i < NumCurrentSelections)
        {        
          xEvent event;

          /* If the timestamp in client's request is in the past relative
            to the time stamp indicating the last time the owner of the
            selection was set, do not set the selection, just return 
            success. */
            if (CompareTimeStamps(time, CurrentSelections[i].lastTimeChanged)
            == EARLIER)
            return Success;
          if (CurrentSelections[i].client &&
            (!pWin || (CurrentSelections[i].client != client)))
          {
            event.u.u.type = SelectionClear;
            event.u.selectionClear.time = time.milliseconds;
            event.u.selectionClear.window = CurrentSelections[i].window;
            event.u.selectionClear.atom = CurrentSelections[i].selection;
            (void) TryClientEvents (CurrentSelections[i].client, &event, 1,
                        NoEventMask, NoEventMask /* CantBeFiltered */,
                        NullGrab);
          }
      }
      else
      {
          /*
           * It doesn't exist, so add it...
           */
          Selection *newsels;

          if (i == 0)
            newsels = (Selection *)xalloc(sizeof(Selection));
          else
            newsels = (Selection *)xrealloc(CurrentSelections,
                      (NumCurrentSelections + 1) * sizeof(Selection));
          if (!newsels)
            return BadAlloc;
          NumCurrentSelections++;
          CurrentSelections = newsels;
          CurrentSelections[i].selection = stuff->selection;
      }
        CurrentSelections[i].lastTimeChanged = time;
      CurrentSelections[i].window = stuff->window;
      CurrentSelections[i].pWin = pWin;
      CurrentSelections[i].client = (pWin ? client : NullClient);
      return (client->noClientException);
    }
    else 
    {
      client->errorValue = stuff->selection;
        return (BadAtom);
    }
}

int
ProcGetSelectionOwner(client)
    register ClientPtr client;
{
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    if (ValidAtom(stuff->id))
    {
      int i;
        xGetSelectionOwnerReply reply;

      i = 0;
        while ((i < NumCurrentSelections) && 
             CurrentSelections[i].selection != stuff->id) i++;
        reply.type = X_Reply;
      reply.length = 0;
      reply.sequenceNumber = client->sequence;
        if (i < NumCurrentSelections)
            reply.owner = CurrentSelections[i].window;
        else
            reply.owner = None;
        WriteReplyToClient(client, sizeof(xGetSelectionOwnerReply), &reply);
        return(client->noClientException);
    }
    else            
    {
      client->errorValue = stuff->id;
        return (BadAtom); 
    }
}

int
ProcConvertSelection(client)
    register ClientPtr client;
{
    Bool paramsOkay;
    xEvent event;
    WindowPtr pWin;
    REQUEST(xConvertSelectionReq);

    REQUEST_SIZE_MATCH(xConvertSelectionReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->requestor, client,
                                 SecurityReadAccess);
    if (!pWin)
        return(BadWindow);

    paramsOkay = (ValidAtom(stuff->selection) && ValidAtom(stuff->target));
    if (stuff->property != None)
      paramsOkay &= ValidAtom(stuff->property);
    if (paramsOkay)
    {
      int i;

      i = 0;
      while ((i < NumCurrentSelections) && 
             CurrentSelections[i].selection != stuff->selection) i++;
      if ((i < NumCurrentSelections) && 
          (CurrentSelections[i].window != None)
#ifdef XCSECURITY
          && (!client->CheckAccess ||
            (* client->CheckAccess)(client, CurrentSelections[i].window,
                              RT_WINDOW, SecurityReadAccess,
                              CurrentSelections[i].pWin))
#endif
          )
      {        
          event.u.u.type = SelectionRequest;
          event.u.selectionRequest.time = stuff->time;
          event.u.selectionRequest.owner = 
                  CurrentSelections[i].window;
          event.u.selectionRequest.requestor = stuff->requestor;
          event.u.selectionRequest.selection = stuff->selection;
          event.u.selectionRequest.target = stuff->target;
          event.u.selectionRequest.property = stuff->property;
          if (TryClientEvents(
            CurrentSelections[i].client, &event, 1, NoEventMask,
            NoEventMask /* CantBeFiltered */, NullGrab))
            return (client->noClientException);
      }
      event.u.u.type = SelectionNotify;
      event.u.selectionNotify.time = stuff->time;
      event.u.selectionNotify.requestor = stuff->requestor;
      event.u.selectionNotify.selection = stuff->selection;
      event.u.selectionNotify.target = stuff->target;
      event.u.selectionNotify.property = None;
      (void) TryClientEvents(client, &event, 1, NoEventMask,
                         NoEventMask /* CantBeFiltered */, NullGrab);
      return (client->noClientException);
    }
    else 
    {
      client->errorValue = stuff->property;
        return (BadAtom);
    }
}

int
ProcGrabServer(client)
    register ClientPtr client;
{
    REQUEST_SIZE_MATCH(xReq);
    if (grabState != GrabNone && client != grabClient)
    {
      ResetCurrentRequest(client);
      client->sequence--;
      BITSET(grabWaiters, client->index);
      IgnoreClient(client);
      return(client->noClientException);
    }
    OnlyListenToOneClient(client);
    grabState = GrabKickout;
    grabClient = client;

    if (ServerGrabCallback)
    {
      ServerGrabInfoRec grabinfo;
      grabinfo.client = client;
      grabinfo.grabstate  = SERVER_GRABBED;
      CallCallbacks(&ServerGrabCallback, (pointer)&grabinfo);
    }

    return(client->noClientException);
}

static void
#if NeedFunctionPrototypes
UngrabServer(ClientPtr client)
#else
UngrabServer(client)
    ClientPtr client;
#endif
{
    int i;

    grabState = GrabNone;
    ListenToAllClients();
    for (i = mskcnt; --i >= 0 && !grabWaiters[i]; )
      ;
    if (i >= 0)
    {
      i <<= 5;
      while (!GETBIT(grabWaiters, i))
          i++;
      BITCLEAR(grabWaiters, i);
      AttendClient(clients[i]);
    }

    if (ServerGrabCallback)
    {
      ServerGrabInfoRec grabinfo;
      grabinfo.client = client;
      grabinfo.grabstate  = SERVER_UNGRABBED;
      CallCallbacks(&ServerGrabCallback, (pointer)&grabinfo);
    }
}

int
ProcUngrabServer(client)
    register ClientPtr client;
{
    REQUEST_SIZE_MATCH(xReq);
    UngrabServer(client);
    return(client->noClientException);
}

int
ProcTranslateCoords(client)
    register ClientPtr client;
{
    REQUEST(xTranslateCoordsReq);

    register WindowPtr pWin, pDst;
    xTranslateCoordsReply rep;

    REQUEST_SIZE_MATCH(xTranslateCoordsReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->srcWid, client,
                                 SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    pDst = (WindowPtr)SecurityLookupWindow(stuff->dstWid, client,
                                 SecurityReadAccess);
    if (!pDst)
        return(BadWindow);
    rep.type = X_Reply;
    rep.length = 0;
    rep.sequenceNumber = client->sequence;
    if (!SAME_SCREENS(pWin->drawable, pDst->drawable))
    {
      rep.sameScreen = xFalse;
        rep.child = None;
      rep.dstX = rep.dstY = 0;
    }
    else
    {
      INT16 x, y;
      rep.sameScreen = xTrue;
      rep.child = None;
      /* computing absolute coordinates -- adjust to destination later */
      x = pWin->drawable.x + stuff->srcX;
      y = pWin->drawable.y + stuff->srcY;
      pWin = pDst->firstChild;
      while (pWin)
      {
#ifdef SHAPE
          BoxRec  box;
#endif
          if ((pWin->mapped) &&
            (x >= pWin->drawable.x - wBorderWidth (pWin)) &&
            (x < pWin->drawable.x + (int)pWin->drawable.width +
             wBorderWidth (pWin)) &&
            (y >= pWin->drawable.y - wBorderWidth (pWin)) &&
            (y < pWin->drawable.y + (int)pWin->drawable.height +
             wBorderWidth (pWin))
#ifdef SHAPE
            /* When a window is shaped, a further check
             * is made to see if the point is inside
             * borderSize
             */
            && (!wBoundingShape(pWin) ||
                POINT_IN_REGION(pWin->drawable.pScreen, 
                              &pWin->borderSize, x, y, &box))
#endif
            )
            {
            rep.child = pWin->drawable.id;
            pWin = (WindowPtr) NULL;
          }
          else
            pWin = pWin->nextSib;
      }
      /* adjust to destination coordinates */
      rep.dstX = x - pDst->drawable.x;
      rep.dstY = y - pDst->drawable.y;
    }
    WriteReplyToClient(client, sizeof(xTranslateCoordsReply), &rep);
    return(client->noClientException);
}

int
ProcOpenFont(client)
    register ClientPtr client;
{
    int     err;
    REQUEST(xOpenFontReq);

    REQUEST_FIXED_SIZE(xOpenFontReq, stuff->nbytes);
    client->errorValue = stuff->fid;
    LEGAL_NEW_RESOURCE(stuff->fid, client);
    err = OpenFont(client, stuff->fid, (Mask) 0,
            stuff->nbytes, (char *)&stuff[1]);
    if (err == Success)
    {
      return(client->noClientException);
    }
    else
      return err;
}

int
ProcCloseFont(client)
    register ClientPtr client;
{
    FontPtr pFont;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pFont = (FontPtr)SecurityLookupIDByType(client, stuff->id, RT_FONT,
                                  SecurityDestroyAccess);
    if ( pFont != (FontPtr)NULL)    /* id was valid */
    {
        FreeResource(stuff->id, RT_NONE);
      return(client->noClientException);
    }
    else
    {
      client->errorValue = stuff->id;
        return (BadFont);
    }
}

int
ProcQueryFont(client)
    register ClientPtr client;
{
    xQueryFontReply     *reply;
    FontPtr pFont;
    register GC *pGC;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    client->errorValue = stuff->id;       /* EITHER font or gc */
    pFont = (FontPtr)SecurityLookupIDByType(client, stuff->id, RT_FONT,
                                  SecurityReadAccess);
    if (!pFont)
    {
        /* can't use VERIFY_GC because it might return BadGC */
      pGC = (GC *) SecurityLookupIDByType(client, stuff->id, RT_GC,
                                  SecurityReadAccess);
        if (!pGC)
      {
          client->errorValue = stuff->id;
            return(BadFont);     /* procotol spec says only error is BadFont */
      }
      pFont = pGC->font;
    }

    {
      xCharInfo   *pmax = FONTINKMAX(pFont);
      xCharInfo   *pmin = FONTINKMIN(pFont);
      int         nprotoxcistructs;
      int         rlength;

      nprotoxcistructs = (
         pmax->rightSideBearing == pmin->rightSideBearing &&
         pmax->leftSideBearing == pmin->leftSideBearing &&
         pmax->descent == pmin->descent &&
         pmax->ascent == pmin->ascent &&
         pmax->characterWidth == pmin->characterWidth) ?
            0 : N2dChars(pFont);

      rlength = sizeof(xQueryFontReply) +
                   FONTINFONPROPS(FONTCHARSET(pFont)) * sizeof(xFontProp)  +
                 nprotoxcistructs * sizeof(xCharInfo);
      reply = (xQueryFontReply *)ALLOCATE_LOCAL(rlength);
      if(!reply)
      {
          return(BadAlloc);
      }

      reply->type = X_Reply;
      reply->length = (rlength - sizeof(xGenericReply)) >> 2;
      reply->sequenceNumber = client->sequence;
      QueryFont( pFont, reply, nprotoxcistructs);

        WriteReplyToClient(client, rlength, reply);
      DEALLOCATE_LOCAL(reply);
      return(client->noClientException);
    }
}

int
ProcQueryTextExtents(client)
    register ClientPtr client;
{
    REQUEST(xQueryTextExtentsReq);
    xQueryTextExtentsReply reply;
    FontPtr pFont;
    GC *pGC;
    ExtentInfoRec info;
    unsigned long length;

    REQUEST_AT_LEAST_SIZE(xQueryTextExtentsReq);
        
    pFont = (FontPtr)SecurityLookupIDByType(client, stuff->fid, RT_FONT,
                                  SecurityReadAccess);
    if (!pFont)
    {
        pGC = (GC *)SecurityLookupIDByType(client, stuff->fid, RT_GC,
                                 SecurityReadAccess);
        if (!pGC)
      {
          client->errorValue = stuff->fid;
            return(BadFont);
      }
      pFont = pGC->font;
    }
    length = client->req_len - (sizeof(xQueryTextExtentsReq) >> 2);
    length = length << 1;
    if (stuff->oddLength)
    {
      if (length == 0)
          return(BadLength);
        length--;
    }
    if (!QueryTextExtents(pFont, length, (unsigned char *)&stuff[1], &info))
      return(BadAlloc);
    reply.type = X_Reply;
    reply.length = 0;
    reply.sequenceNumber = client->sequence;
    reply.drawDirection = info.drawDirection;
    reply.fontAscent = info.fontAscent;
    reply.fontDescent = info.fontDescent;
    reply.overallAscent = info.overallAscent;
    reply.overallDescent = info.overallDescent;
    reply.overallWidth = info.overallWidth;
    reply.overallLeft = info.overallLeft;
    reply.overallRight = info.overallRight;
    WriteReplyToClient(client, sizeof(xQueryTextExtentsReply), &reply);
    return(client->noClientException);
}

int
ProcListFonts(client)
    register ClientPtr client;
{
    REQUEST(xListFontsReq);

    REQUEST_FIXED_SIZE(xListFontsReq, stuff->nbytes);

    return ListFonts(client, (unsigned char *) &stuff[1], stuff->nbytes, 
      stuff->maxNames);
}

int
ProcListFontsWithInfo(client)
    register ClientPtr client;
{
    REQUEST(xListFontsWithInfoReq);

    REQUEST_FIXED_SIZE(xListFontsWithInfoReq, stuff->nbytes);

    return StartListFontsWithInfo(client, stuff->nbytes,
                          (unsigned char *) &stuff[1], stuff->maxNames);
}

/*ARGSUSED*/
int
dixDestroyPixmap(value, pid)
    pointer value; /* must conform to DeleteType */
    XID pid;
{
    PixmapPtr pPixmap = (PixmapPtr)value;
    return (*pPixmap->drawable.pScreen->DestroyPixmap)(pPixmap);
}

int
ProcCreatePixmap(client)
    register ClientPtr client;
{
    PixmapPtr pMap;
    register DrawablePtr pDraw;
    REQUEST(xCreatePixmapReq);
    DepthPtr pDepth;
    register int i;

    REQUEST_SIZE_MATCH(xCreatePixmapReq);
    client->errorValue = stuff->pid;
    LEGAL_NEW_RESOURCE(stuff->pid, client);
    SECURITY_VERIFY_GEOMETRABLE (pDraw, stuff->drawable, client,
                         SecurityReadAccess);
    if (!stuff->width || !stuff->height)
    {
      client->errorValue = 0;
        return BadValue;
    }
    if (stuff->depth != 1)
    {
        pDepth = pDraw->pScreen->allowedDepths;
        for (i=0; i<pDraw->pScreen->numDepths; i++, pDepth++)
         if (pDepth->depth == stuff->depth)
               goto CreatePmap;
      client->errorValue = stuff->depth;
        return BadValue;
    }
CreatePmap:
    pMap = (PixmapPtr)(*pDraw->pScreen->CreatePixmap)
            (pDraw->pScreen, stuff->width,
             stuff->height, stuff->depth);
    if (pMap)
    {
      pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
      pMap->drawable.id = stuff->pid;
      if (AddResource(stuff->pid, RT_PIXMAP, (pointer)pMap))
          return(client->noClientException);
    }
    return (BadAlloc);
}

int
ProcFreePixmap(client)
    register ClientPtr client;
{
    PixmapPtr pMap;

    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pMap = (PixmapPtr)SecurityLookupIDByType(client, stuff->id, RT_PIXMAP,
                                   SecurityDestroyAccess);
    if (pMap) 
    {
      FreeResource(stuff->id, RT_NONE);
      return(client->noClientException);
    }
    else 
    {
      client->errorValue = stuff->id;
      return (BadPixmap);
    }
}

int
ProcCreateGC(client)
    register ClientPtr client;
{
    int error;
    GC *pGC;
    register DrawablePtr pDraw;
    unsigned len;
    REQUEST(xCreateGCReq);

    REQUEST_AT_LEAST_SIZE(xCreateGCReq);
    client->errorValue = stuff->gc;
    LEGAL_NEW_RESOURCE(stuff->gc, client);
    SECURITY_VERIFY_DRAWABLE (pDraw, stuff->drawable, client,
                        SecurityReadAccess);
    len = client->req_len -  (sizeof(xCreateGCReq) >> 2);
    if (len != Ones(stuff->mask))
        return BadLength;
    pGC = (GC *)CreateGC(pDraw, stuff->mask, 
                   (XID *) &stuff[1], &error);
    if (error != Success)
        return error;
    if (!AddResource(stuff->gc, RT_GC, (pointer)pGC))
      return (BadAlloc);
    return(client->noClientException);
}

int
ProcChangeGC(client)
    register ClientPtr client;
{
    GC *pGC;
    REQUEST(xChangeGCReq);
    int result;
    unsigned len;
            
    REQUEST_AT_LEAST_SIZE(xChangeGCReq);
    SECURITY_VERIFY_GC(pGC, stuff->gc, client, SecurityWriteAccess);
    len = client->req_len -  (sizeof(xChangeGCReq) >> 2);
    if (len != Ones(stuff->mask))
        return BadLength;

    result = dixChangeGC(client, pGC, stuff->mask, (CARD32 *) &stuff[1], 0);
    if (client->noClientException != Success)
        return(client->noClientException);
    else
    {
      client->errorValue = clientErrorValue;
        return(result);
    }
}

int
ProcCopyGC(client)
    register ClientPtr client;
{
    register GC *dstGC;
    register GC *pGC;
    int result;
    REQUEST(xCopyGCReq);

    REQUEST_SIZE_MATCH(xCopyGCReq);
    SECURITY_VERIFY_GC( pGC, stuff->srcGC, client, SecurityReadAccess);
    SECURITY_VERIFY_GC( dstGC, stuff->dstGC, client, SecurityWriteAccess);
    if ((dstGC->pScreen != pGC->pScreen) || (dstGC->depth != pGC->depth))
        return (BadMatch);    
    result = CopyGC(pGC, dstGC, stuff->mask);
    if (client->noClientException != Success)
        return(client->noClientException);
    else
    {
      client->errorValue = clientErrorValue;
        return(result);
    }
}

int
ProcSetDashes(client)
    register ClientPtr client;
{
    register GC *pGC;
    int result;
    REQUEST(xSetDashesReq);

    REQUEST_FIXED_SIZE(xSetDashesReq, stuff->nDashes);
    if (stuff->nDashes == 0)
    {
       client->errorValue = 0;
         return BadValue;
    }

    SECURITY_VERIFY_GC(pGC,stuff->gc, client, SecurityWriteAccess);

    result = SetDashes(pGC, stuff->dashOffset, stuff->nDashes,
                   (unsigned char *)&stuff[1]);
    if (client->noClientException != Success)
        return(client->noClientException);
    else
    {
      client->errorValue = clientErrorValue;
        return(result);
    }
}

int
ProcSetClipRectangles(client)
    register ClientPtr client;
{
    int     nr;
    int result;
    register GC *pGC;
    REQUEST(xSetClipRectanglesReq);

    REQUEST_AT_LEAST_SIZE(xSetClipRectanglesReq);
    if ((stuff->ordering != Unsorted) && (stuff->ordering != YSorted) &&
      (stuff->ordering != YXSorted) && (stuff->ordering != YXBanded))
    {
      client->errorValue = stuff->ordering;
        return BadValue;
    }
    SECURITY_VERIFY_GC(pGC,stuff->gc, client, SecurityWriteAccess);
             
    nr = (client->req_len << 2) - sizeof(xSetClipRectanglesReq);
    if (nr & 4)
      return(BadLength);
    nr >>= 3;
    result = SetClipRects(pGC, stuff->xOrigin, stuff->yOrigin,
                    nr, (xRectangle *)&stuff[1], (int)stuff->ordering);
    if (client->noClientException != Success)
        return(client->noClientException);
    else
        return(result);
}

int
ProcFreeGC(client)
    register ClientPtr client;
{
    register GC *pGC;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    SECURITY_VERIFY_GC(pGC, stuff->id, client, SecurityDestroyAccess);
    FreeResource(stuff->id, RT_NONE);
    return(client->noClientException);
}

int
ProcClearToBackground(client)
    register ClientPtr client;
{
    REQUEST(xClearAreaReq);
    register WindowPtr pWin;

    REQUEST_SIZE_MATCH(xClearAreaReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
                                 SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);
    if (pWin->drawable.class == InputOnly)
    {
      client->errorValue = stuff->window;
      return (BadMatch);
    }           
    if ((stuff->exposures != xTrue) && (stuff->exposures != xFalse))
    {
      client->errorValue = stuff->exposures;
        return(BadValue);
    }
    (*pWin->drawable.pScreen->ClearToBackground)(pWin, stuff->x, stuff->y,
                         stuff->width, stuff->height,
                         (Bool)stuff->exposures);
    return(client->noClientException);
}

int
ProcCopyArea(client)
    register ClientPtr client;
{
    register DrawablePtr pDst;
    register DrawablePtr pSrc;
    register GC *pGC;
    REQUEST(xCopyAreaReq);
    RegionPtr pRgn;

    REQUEST_SIZE_MATCH(xCopyAreaReq);

    VALIDATE_DRAWABLE_AND_GC(stuff->dstDrawable, pDst, pGC, client); 
    if (stuff->dstDrawable != stuff->srcDrawable)
    {
      SECURITY_VERIFY_DRAWABLE(pSrc, stuff->srcDrawable, client,
                         SecurityReadAccess);
      if ((pDst->pScreen != pSrc->pScreen) || (pDst->depth != pSrc->depth))
      {
          client->errorValue = stuff->dstDrawable;
          return (BadMatch);
      }
    }
    else
        pSrc = pDst;

    SET_DBE_SRCBUF(pSrc, stuff->srcDrawable);

    pRgn = (*pGC->ops->CopyArea)(pSrc, pDst, pGC, stuff->srcX, stuff->srcY,
                         stuff->width, stuff->height, 
                         stuff->dstX, stuff->dstY);
    if (pGC->graphicsExposures)
    {
      (*pDst->pScreen->SendGraphicsExpose)
            (client, pRgn, stuff->dstDrawable, X_CopyArea, 0);
      if (pRgn)
          REGION_DESTROY(pDst->pScreen, pRgn);
    }

    return(client->noClientException);
}

int
ProcCopyPlane(client)
    register ClientPtr client;
{
    register DrawablePtr psrcDraw, pdstDraw;
    register GC *pGC;
    REQUEST(xCopyPlaneReq);
    RegionPtr pRgn;

    REQUEST_SIZE_MATCH(xCopyPlaneReq);

    VALIDATE_DRAWABLE_AND_GC(stuff->dstDrawable, pdstDraw, pGC, client);
    if (stuff->dstDrawable != stuff->srcDrawable)
    {
      SECURITY_VERIFY_DRAWABLE(psrcDraw, stuff->srcDrawable, client,
                         SecurityReadAccess);
      if (pdstDraw->pScreen != psrcDraw->pScreen)
      {
          client->errorValue = stuff->dstDrawable;
          return (BadMatch);
      }
    }
    else
        psrcDraw = pdstDraw;

    SET_DBE_SRCBUF(psrcDraw, stuff->srcDrawable);

    /* Check to see if stuff->bitPlane has exactly ONE good bit set */
    if(stuff->bitPlane == 0 || (stuff->bitPlane & (stuff->bitPlane - 1)) ||
       (stuff->bitPlane > (1L << (psrcDraw->depth - 1))))
    {
       client->errorValue = stuff->bitPlane;
       return(BadValue);
    }

    pRgn = (*pGC->ops->CopyPlane)(psrcDraw, pdstDraw, pGC, stuff->srcX, stuff->srcY,
                         stuff->width, stuff->height, 
                         stuff->dstX, stuff->dstY, stuff->bitPlane);
    if (pGC->graphicsExposures)
    {
      (*pdstDraw->pScreen->SendGraphicsExpose)
            (client, pRgn, stuff->dstDrawable, X_CopyPlane, 0);
      if (pRgn)
          REGION_DESTROY(pdstDraw->pScreen, pRgn);
    }
    return(client->noClientException);
}

int
ProcPolyPoint(client)
    register ClientPtr client;
{
    int npoint;
    register GC *pGC;
    register DrawablePtr pDraw;
    REQUEST(xPolyPointReq);

    REQUEST_AT_LEAST_SIZE(xPolyPointReq);
    if ((stuff->coordMode != CoordModeOrigin) && 
      (stuff->coordMode != CoordModePrevious))
    {
      client->errorValue = stuff->coordMode;
        return BadValue;
    }
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client); 
    npoint = ((client->req_len << 2) - sizeof(xPolyPointReq)) >> 2;
    if (npoint)
        (*pGC->ops->PolyPoint)(pDraw, pGC, stuff->coordMode, npoint,
                    (xPoint *) &stuff[1]);
    return (client->noClientException);
}

int
ProcPolyLine(client)
    register ClientPtr client;
{
    int npoint;
    register GC *pGC;
    register DrawablePtr pDraw;
    REQUEST(xPolyLineReq);

    REQUEST_AT_LEAST_SIZE(xPolyLineReq);
    if ((stuff->coordMode != CoordModeOrigin) && 
      (stuff->coordMode != CoordModePrevious))
    {
      client->errorValue = stuff->coordMode;
        return BadValue;
    }
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);
    npoint = ((client->req_len << 2) - sizeof(xPolyLineReq)) >> 2;
    if (npoint > 1)
      (*pGC->ops->Polylines)(pDraw, pGC, stuff->coordMode, npoint, 
                        (DDXPointPtr) &stuff[1]);
    return(client->noClientException);
}

int
ProcPolySegment(client)
    register ClientPtr client;
{
    int nsegs;
    register GC *pGC;
    register DrawablePtr pDraw;
    REQUEST(xPolySegmentReq);

    REQUEST_AT_LEAST_SIZE(xPolySegmentReq);
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);
    nsegs = (client->req_len << 2) - sizeof(xPolySegmentReq);
    if (nsegs & 4)
      return(BadLength);
    nsegs >>= 3;
    if (nsegs)
        (*pGC->ops->PolySegment)(pDraw, pGC, nsegs, (xSegment *) &stuff[1]);
    return (client->noClientException);
}

int
ProcPolyRectangle (client)
    register ClientPtr client;
{
    int nrects;
    register GC *pGC;
    register DrawablePtr pDraw;
    REQUEST(xPolyRectangleReq);

    REQUEST_AT_LEAST_SIZE(xPolyRectangleReq);
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);
    nrects = (client->req_len << 2) - sizeof(xPolyRectangleReq);
    if (nrects & 4)
      return(BadLength);
    nrects >>= 3;
    if (nrects)
        (*pGC->ops->PolyRectangle)(pDraw, pGC, 
                nrects, (xRectangle *) &stuff[1]);
    return(client->noClientException);
}

int
ProcPolyArc(client)
    register ClientPtr client;
{
    int           narcs;
    register GC *pGC;
    register DrawablePtr pDraw;
    REQUEST(xPolyArcReq);

    REQUEST_AT_LEAST_SIZE(xPolyArcReq);
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);
    narcs = (client->req_len << 2) - sizeof(xPolyArcReq);
    if (narcs % sizeof(xArc))
      return(BadLength);
    narcs /= sizeof(xArc);
    if (narcs)
        (*pGC->ops->PolyArc)(pDraw, pGC, narcs, (xArc *) &stuff[1]);
    return (client->noClientException);
}

int
ProcFillPoly(client)
    register ClientPtr client;
{
    int          things;
    register GC *pGC;
    register DrawablePtr pDraw;
    REQUEST(xFillPolyReq);

    REQUEST_AT_LEAST_SIZE(xFillPolyReq);
    if ((stuff->shape != Complex) && (stuff->shape != Nonconvex) &&  
      (stuff->shape != Convex))
    {
      client->errorValue = stuff->shape;
        return BadValue;
    }
    if ((stuff->coordMode != CoordModeOrigin) && 
      (stuff->coordMode != CoordModePrevious))
    {
      client->errorValue = stuff->coordMode;
        return BadValue;
    }

    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);
    things = ((client->req_len << 2) - sizeof(xFillPolyReq)) >> 2;
    if (things)
        (*pGC->ops->FillPolygon) (pDraw, pGC, stuff->shape,
                   stuff->coordMode, things,
                   (DDXPointPtr) &stuff[1]);
    return(client->noClientException);
}

int
ProcPolyFillRectangle(client)
    register ClientPtr client;
{
    int             things;
    register GC *pGC;
    register DrawablePtr pDraw;
    REQUEST(xPolyFillRectangleReq);

    REQUEST_AT_LEAST_SIZE(xPolyFillRectangleReq);
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);
    things = (client->req_len << 2) - sizeof(xPolyFillRectangleReq);
    if (things & 4)
      return(BadLength);
    things >>= 3;

    if (things)
        (*pGC->ops->PolyFillRect) (pDraw, pGC, things,
                  (xRectangle *) &stuff[1]);
    return (client->noClientException);
}

int
ProcPolyFillArc(client)
    register ClientPtr client;
{
    int           narcs;
    register GC *pGC;
    register DrawablePtr pDraw;
    REQUEST(xPolyFillArcReq);

    REQUEST_AT_LEAST_SIZE(xPolyFillArcReq);
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);
    narcs = (client->req_len << 2) - sizeof(xPolyFillArcReq);
    if (narcs % sizeof(xArc))
      return(BadLength);
    narcs /= sizeof(xArc);
    if (narcs)
        (*pGC->ops->PolyFillArc) (pDraw, pGC, narcs, (xArc *) &stuff[1]);
    return (client->noClientException);
}

#ifdef MATCH_CLIENT_ENDIAN

int
ServerOrder (void)
{
    int         whichbyte = 1;

    if (*((char *) &whichbyte))
      return LSBFirst;
    return MSBFirst;
}

#define ClientOrder(client) ((client)->swapped ? !ServerOrder() : ServerOrder())

void
ReformatImage (char *base, int nbytes, int bpp, int order)
{
    switch (bpp) {
    case 1: /* yuck */
      if (BITMAP_BIT_ORDER != order)
          BitOrderInvert ((unsigned char *) base, nbytes);
#if IMAGE_BYTE_ORDER != BITMAP_BIT_ORDER && BITMAP_SCANLINE_UNIT != 8
      ReformatImage (base, nbytes, BITMAP_SCANLINE_UNIT, order);
#endif
      break;
    case 4:
      break;  /* yuck */
    case 8:
      break;
    case 16:
      if (IMAGE_BYTE_ORDER != order)
          TwoByteSwap ((unsigned char *) base, nbytes);
      break;
    case 32:
      if (IMAGE_BYTE_ORDER != order)
          FourByteSwap ((unsigned char *) base, nbytes);
      break;
    }
}
#else
#define ReformatImage(b,n,bpp,o)
#endif

/* 64-bit server notes: the protocol restricts padding of images to
 * 8-, 16-, or 32-bits. We would like to have 64-bits for the server
 * to use internally. Removes need for internal alignment checking.
 * All of the PutImage functions could be changed individually, but
 * as currently written, they call other routines which require things
 * to be 64-bit padded on scanlines, so we changed things here.
 * If an image would be padded differently for 64- versus 32-, then
 * copy each scanline to a 64-bit padded scanline.
 * Also, we need to make sure that the image is aligned on a 64-bit
 * boundary, even if the scanlines are padded to our satisfaction.
 */
int
ProcPutImage(client)
    register ClientPtr client;
{
    register      GC *pGC;
    register      DrawablePtr pDraw;
    long    length;     /* length of scanline server padded */
    long    lengthProto;      /* length of scanline protocol padded */
    char    *tmpImage;
    REQUEST(xPutImageReq);

    REQUEST_AT_LEAST_SIZE(xPutImageReq);
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);
    if (stuff->format == XYBitmap)
    {
        if ((stuff->depth != 1) ||
          (stuff->leftPad >= (unsigned int)screenInfo.bitmapScanlinePad))
            return BadMatch;
        length        = BitmapBytePad(stuff->width + stuff->leftPad);
    }
    else if (stuff->format == XYPixmap)
    {
        if ((pDraw->depth != stuff->depth) || 
          (stuff->leftPad >= (unsigned int)screenInfo.bitmapScanlinePad))
            return BadMatch;
        length      = BitmapBytePad(stuff->width + stuff->leftPad);
      length      *= stuff->depth;
    }
    else if (stuff->format == ZPixmap)
    {
        if ((pDraw->depth != stuff->depth) || (stuff->leftPad != 0))
            return BadMatch;
        length      = PixmapBytePad(stuff->width, stuff->depth);
    }
    else
    {
      client->errorValue = stuff->format;
        return BadValue;
    }

    tmpImage = (char *)&stuff[1];
    lengthProto = length;
      
    if (((((lengthProto * stuff->height) + (unsigned)3) >> 2) + 
      (sizeof(xPutImageReq) >> 2)) != client->req_len)
      return BadLength;

    ReformatImage (tmpImage, lengthProto * stuff->height, 
               stuff->format == ZPixmap ? BitsPerPixel (stuff->depth) : 1,
               ClientOrder(client));
    
    (*pGC->ops->PutImage) (pDraw, pGC, stuff->depth, stuff->dstX, stuff->dstY,
              stuff->width, stuff->height, 
              stuff->leftPad, stuff->format, tmpImage);

     return (client->noClientException);
}


int
DoGetImage(client, format, drawable, x, y, width, height, planemask, im_return)
    register ClientPtr  client;
    Drawable drawable;
    int format;
    int x, y, width, height;
    Mask planemask;
    xGetImageReply **im_return;
{
    register DrawablePtr pDraw;
    int                 nlines, linesPerBuf;
    register int  linesDone;
    long          widthBytesLine, length;
    Mask          plane = 0;
    char          *pBuf;
    xGetImageReply      xgi;
    RegionPtr pVisibleRegion = NULL;

    if ((format != XYPixmap) && (format != ZPixmap))
    {
      client->errorValue = format;
        return(BadValue);
    }
    SECURITY_VERIFY_DRAWABLE(pDraw, drawable, client, SecurityReadAccess);
    if(pDraw->type == DRAWABLE_WINDOW)
    {
      if( /* check for being viewable */
       !((WindowPtr) pDraw)->realized ||
        /* check for being on screen */
         pDraw->x + x < 0 ||
       pDraw->x + x + width > pDraw->pScreen->width ||
         pDraw->y + y < 0 ||
         pDraw->y + y + height > pDraw->pScreen->height ||
          /* check for being inside of border */
         x < - wBorderWidth((WindowPtr)pDraw) ||
         x + width > wBorderWidth((WindowPtr)pDraw) + (int)pDraw->width ||
         y < -wBorderWidth((WindowPtr)pDraw) ||
         y + height > wBorderWidth ((WindowPtr)pDraw) + (int)pDraw->height
        )
          return(BadMatch);
      xgi.visual = wVisual (((WindowPtr) pDraw));
    }
    else
    {
      if(x < 0 ||
         x+width > (int)pDraw->width ||
         y < 0 ||
         y+height > (int)pDraw->height
        )
          return(BadMatch);
      xgi.visual = None;
    }

    SET_DBE_SRCBUF(pDraw, drawable);

    xgi.type = X_Reply;
    xgi.sequenceNumber = client->sequence;
    xgi.depth = pDraw->depth;
    if(format == ZPixmap)
    {
      widthBytesLine = PixmapBytePad(width, pDraw->depth);
      length = widthBytesLine * height;

    }
    else 
    {
      widthBytesLine = BitmapBytePad(width);
      plane = ((Mask)1) << (pDraw->depth - 1);
      /* only planes asked for */
      length = widthBytesLine * height *
             Ones(planemask & (plane | (plane - 1)));

    }

    xgi.length = length;

    if (im_return) {
      pBuf = (char *)xalloc(sz_xGetImageReply + length);
      if (!pBuf)
          return (BadAlloc);
      if (widthBytesLine == 0)
          linesPerBuf = 0;
      else
          linesPerBuf = height;
      *im_return = (xGetImageReply *)pBuf;
      *(xGetImageReply *)pBuf = xgi;
      pBuf += sz_xGetImageReply;
    } else {
      xgi.length = (xgi.length + 3) >> 2;
      if (widthBytesLine == 0 || height == 0)
          linesPerBuf = 0;
      else if (widthBytesLine >= IMAGE_BUFSIZE)
          linesPerBuf = 1;
      else
      {
          linesPerBuf = IMAGE_BUFSIZE / widthBytesLine;
          if (linesPerBuf > height)
            linesPerBuf = height;
      }
      length = linesPerBuf * widthBytesLine;
      if (linesPerBuf < height)
      {
          /* we have to make sure intermediate buffers don't need padding */
          while ((linesPerBuf > 1) &&
               (length & ((1L << LOG2_BYTES_PER_SCANLINE_PAD)-1)))
          {
            linesPerBuf--;
            length -= widthBytesLine;
          }
          while (length & ((1L << LOG2_BYTES_PER_SCANLINE_PAD)-1))
          {
            linesPerBuf++;
            length += widthBytesLine;
          }
      }
      if(!(pBuf = (char *) ALLOCATE_LOCAL(length)))
          return (BadAlloc);
      WriteReplyToClient(client, sizeof (xGetImageReply), &xgi);
    }

#ifdef XCSECURITY
    if (client->trustLevel != XSecurityClientTrusted &&
      pDraw->type == DRAWABLE_WINDOW)
    {
      pVisibleRegion = NotClippedByChildren((WindowPtr)pDraw);
      if (pVisibleRegion)
      {
          REGION_TRANSLATE(pScreen, pVisibleRegion, -pDraw->x, -pDraw->y);
      }
    }
#endif

    if (linesPerBuf == 0)
    {
      /* nothing to do */
    }
    else if (format == ZPixmap)
    {
        linesDone = 0;
        while (height - linesDone > 0)
        {
          nlines = min(linesPerBuf, height - linesDone);
          (*pDraw->pScreen->GetImage) (pDraw,
                                       x,
                                 y + linesDone,
                                 width, 
                                 nlines,
                                 format,
                                 planemask,
                                 (pointer) pBuf);
#ifdef XCSECURITY
          if (pVisibleRegion)
            SecurityCensorImage(client, pVisibleRegion, widthBytesLine,
                  pDraw, x, y + linesDone, width, 
                  nlines, format, pBuf);
#endif

          /* Note that this is NOT a call to WriteSwappedDataToClient,
               as we do NOT byte swap */
          if (!im_return)
          {
            ReformatImage (pBuf, (int)(nlines * widthBytesLine),
                         BitsPerPixel (pDraw->depth),
                         ClientOrder(client));

/* Don't split me, gcc pukes when you do */
            (void)WriteToClient(client,
                            (int)(nlines * widthBytesLine),
                            pBuf);
          }
          linesDone += nlines;
        }
    }
    else /* XYPixmap */
    {
        for (; plane; plane >>= 1)
      {
          if (planemask & plane)
          {
              linesDone = 0;
              while (height - linesDone > 0)
              {
                nlines = min(linesPerBuf, height - linesDone);
                  (*pDraw->pScreen->GetImage) (pDraw,
                                               x,
                                         y + linesDone,
                                         width, 
                                         nlines,
                                         format,
                                         plane,
                                         (pointer)pBuf);
#ifdef XCSECURITY
                if (pVisibleRegion)
                  SecurityCensorImage(client, pVisibleRegion,
                        widthBytesLine,
                        pDraw, x, y + linesDone, width, 
                        nlines, format, pBuf);
#endif

                /* Note: NOT a call to WriteSwappedDataToClient,
                   as we do NOT byte swap */
                if (im_return) {
                  pBuf += nlines * widthBytesLine;
                } else {
                  ReformatImage (pBuf, 
                               (int)(nlines * widthBytesLine), 
                               1,
                               ClientOrder (client));

/* Don't split me, gcc pukes when you do */
                  (void)WriteToClient(client,
                              (int)(nlines * widthBytesLine),
                              pBuf);
                }
                linesDone += nlines;
            }
            }
      }
    }
#ifdef XCSECURITY
    if (pVisibleRegion)
      REGION_DESTROY(pScreen, pVisibleRegion);
#endif
    if (!im_return)
      DEALLOCATE_LOCAL(pBuf);
    return (client->noClientException);
}

int
ProcGetImage(client)
    register ClientPtr  client;
{
    REQUEST(xGetImageReq);

    REQUEST_SIZE_MATCH(xGetImageReq);

    return DoGetImage(client, stuff->format, stuff->drawable,
                  stuff->x, stuff->y,
                  (int)stuff->width, (int)stuff->height,
                  stuff->planeMask, (xGetImageReply **)NULL);
}

int
ProcPolyText(client)
    register ClientPtr client;
{
    int     err;
    REQUEST(xPolyTextReq);
    DrawablePtr pDraw;
    GC *pGC;

    REQUEST_AT_LEAST_SIZE(xPolyTextReq);
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);

    err = PolyText(client,
               pDraw,
               pGC,
               (unsigned char *)&stuff[1],
               ((unsigned char *) stuff) + (client->req_len << 2),
               stuff->x,
               stuff->y,
               stuff->reqType,
               stuff->drawable);

    if (err == Success)
    {
      return(client->noClientException);
    }
    else
      return err;
}

int
ProcImageText8(client)
    register ClientPtr client;
{
    int     err;
    register DrawablePtr pDraw;
    register GC *pGC;

    REQUEST(xImageTextReq);

    REQUEST_FIXED_SIZE(xImageTextReq, stuff->nChars);
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);

    err = ImageText(client,
                pDraw,
                pGC,
                stuff->nChars,
                (unsigned char *)&stuff[1],
                stuff->x,
                stuff->y,
                stuff->reqType,
                stuff->drawable);

    if (err == Success)
    {
      return(client->noClientException);
    }
    else
      return err;
}

int
ProcImageText16(client)
    register ClientPtr client;
{
    int     err;
    register DrawablePtr pDraw;
    register GC *pGC;

    REQUEST(xImageTextReq);

    REQUEST_FIXED_SIZE(xImageTextReq, stuff->nChars << 1);
    VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);

    err = ImageText(client,
                pDraw,
                pGC,
                stuff->nChars,
                (unsigned char *)&stuff[1],
                stuff->x,
                stuff->y,
                stuff->reqType,
                stuff->drawable);

    if (err == Success)
    {
      return(client->noClientException);
    }
    else
      return err;
}


int
ProcCreateColormap(client)
    register ClientPtr client;
{
    VisualPtr     pVisual;
    ColormapPtr   pmap;
    Colormap      mid;
    register WindowPtr   pWin;
    ScreenPtr pScreen;
    REQUEST(xCreateColormapReq);
    int i, result;

    REQUEST_SIZE_MATCH(xCreateColormapReq);

    if ((stuff->alloc != AllocNone) && (stuff->alloc != AllocAll))
    {
      client->errorValue = stuff->alloc;
        return(BadValue);
    }
    mid = stuff->mid;
    LEGAL_NEW_RESOURCE(mid, client);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
                                 SecurityReadAccess);
    if (!pWin)
        return(BadWindow);

    pScreen = pWin->drawable.pScreen;
    for (i = 0, pVisual = pScreen->visuals;
       i < pScreen->numVisuals;
       i++, pVisual++)
    {
      if (pVisual->vid != stuff->visual)
          continue;
      result =  CreateColormap(mid, pScreen, pVisual, &pmap,
                         (int)stuff->alloc, client->index);
      if (client->noClientException != Success)
          return(client->noClientException);
      else
          return(result);
    }
    client->errorValue = stuff->visual;
    return(BadValue);
}

int
ProcFreeColormap(client)
    register ClientPtr client;
{
    ColormapPtr pmap;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pmap = (ColormapPtr )SecurityLookupIDByType(client, stuff->id, RT_COLORMAP,
                                    SecurityDestroyAccess);
    if (pmap) 
    {
      /* Freeing a default colormap is a no-op */
      if (!(pmap->flags & IsDefault))
          FreeResource(stuff->id, RT_NONE);
      return (client->noClientException);
    }
    else 
    {
      client->errorValue = stuff->id;
      return (BadColor);
    }
}


int
ProcCopyColormapAndFree(client)
    register ClientPtr client;
{
    Colormap      mid;
    ColormapPtr   pSrcMap;
    REQUEST(xCopyColormapAndFreeReq);
    int result;

    REQUEST_SIZE_MATCH(xCopyColormapAndFreeReq);
    mid = stuff->mid;
    LEGAL_NEW_RESOURCE(mid, client);
    if( (pSrcMap = (ColormapPtr )SecurityLookupIDByType(client,   stuff->srcCmap,
            RT_COLORMAP, SecurityReadAccess|SecurityWriteAccess)) )
    {
      result = CopyColormapAndFree(mid, pSrcMap, client->index);
      if (client->noClientException != Success)
            return(client->noClientException);
      else
            return(result);
    }
    else
    {
      client->errorValue = stuff->srcCmap;
      return(BadColor);
    }
}

int
ProcInstallColormap(client)
    register ClientPtr client;
{
    ColormapPtr pcmp;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pcmp = (ColormapPtr)SecurityLookupIDByType(client, stuff->id,
                                  RT_COLORMAP, SecurityReadAccess);
    if (pcmp)
    {
        (*(pcmp->pScreen->InstallColormap)) (pcmp);
        return (client->noClientException);        
    }
    else
    {
        client->errorValue = stuff->id;
        return (BadColor);
    }
}

int
ProcUninstallColormap(client)
    register ClientPtr client;
{
    ColormapPtr pcmp;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pcmp = (ColormapPtr)SecurityLookupIDByType(client, stuff->id,
                              RT_COLORMAP, SecurityReadAccess);
    if (pcmp)
    {
      if(pcmp->mid != pcmp->pScreen->defColormap)
            (*(pcmp->pScreen->UninstallColormap)) (pcmp);
        return (client->noClientException);        
    }
    else
    {
        client->errorValue = stuff->id;
        return (BadColor);
    }
}

int
ProcListInstalledColormaps(client)
    register ClientPtr client;
{
    xListInstalledColormapsReply *preply; 
    int nummaps;
    WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
                                 SecurityReadAccess);

    if (!pWin)
        return(BadWindow);

    preply = (xListInstalledColormapsReply *) 
            ALLOCATE_LOCAL(sizeof(xListInstalledColormapsReply) +
                 pWin->drawable.pScreen->maxInstalledCmaps *
                 sizeof(Colormap));
    if(!preply)
        return(BadAlloc);

    preply->type = X_Reply;
    preply->sequenceNumber = client->sequence;
    nummaps = (*pWin->drawable.pScreen->ListInstalledColormaps)
        (pWin->drawable.pScreen, (Colormap *)&preply[1]);
    preply->nColormaps = nummaps;
    preply->length = nummaps;
    WriteReplyToClient(client, sizeof (xListInstalledColormapsReply), preply);
    client->pSwapReplyFunc = (ReplySwapPtr) Swap32Write;
    WriteSwappedDataToClient(client, nummaps * sizeof(Colormap), &preply[1]);
    DEALLOCATE_LOCAL(preply);
    return(client->noClientException);
}

int
ProcAllocColor(client)
    register ClientPtr client;
{
    ColormapPtr pmap;
    int     retval;
    xAllocColorReply acr;
    REQUEST(xAllocColorReq);

    REQUEST_SIZE_MATCH(xAllocColorReq);
    pmap = (ColormapPtr)SecurityLookupIDByType(client, stuff->cmap,
                              RT_COLORMAP, SecurityWriteAccess);
    if (pmap)
    {
#ifdef LBX
      /*
       * If the colormap is grabbed by a proxy, the server will have
       * to regain control over the colormap.  This AllocColor request
       * will be handled after the server gets back the colormap control.
       */
      if (LbxCheckColorRequest (client, pmap, (xReq *) stuff))
          return Success;
#endif
      acr.type = X_Reply;
      acr.length = 0;
      acr.sequenceNumber = client->sequence;
      acr.red = stuff->red;
      acr.green = stuff->green;
      acr.blue = stuff->blue;
      acr.pixel = 0;
      if( (retval = AllocColor(pmap, &acr.red, &acr.green, &acr.blue,
                             &acr.pixel, client->index)) )
      {
            if (client->noClientException != Success)
                return(client->noClientException);
          else
              return (retval);
      }
#ifdef PANORAMIX
      if (noPanoramiXExtension || !pmap->pScreen->myNum)
#endif
        WriteReplyToClient(client, sizeof(xAllocColorReply), &acr);
      return (client->noClientException);

    }
    else
    {
        client->errorValue = stuff->cmap;
        return (BadColor);
    }
}

int
ProcAllocNamedColor           (client)
    register ClientPtr client;
{
    ColormapPtr pcmp;
    REQUEST(xAllocNamedColorReq);

    REQUEST_FIXED_SIZE(xAllocNamedColorReq, stuff->nbytes);
    pcmp = (ColormapPtr)SecurityLookupIDByType(client, stuff->cmap,
                                  RT_COLORMAP, SecurityWriteAccess);
    if (pcmp)
    {
      int         retval;

      xAllocNamedColorReply ancr;

#ifdef LBX
      /*
       * If the colormap is grabbed by a proxy, the server will have
       * to regain control over the colormap.  This AllocNamedColor request
       * will be handled after the server gets back the colormap control.
       */
      if (LbxCheckColorRequest (client, pcmp, (xReq *) stuff))
          return Success;
#endif
      ancr.type = X_Reply;
      ancr.length = 0;
      ancr.sequenceNumber = client->sequence;

      if(OsLookupColor(pcmp->pScreen->myNum, (char *)&stuff[1], stuff->nbytes,
                       &ancr.exactRed, &ancr.exactGreen, &ancr.exactBlue))
      {
          ancr.screenRed = ancr.exactRed;
          ancr.screenGreen = ancr.exactGreen;
          ancr.screenBlue = ancr.exactBlue;
          ancr.pixel = 0;
          if( (retval = AllocColor(pcmp,
                       &ancr.screenRed, &ancr.screenGreen, &ancr.screenBlue,
                   &ancr.pixel, client->index)) )
          {
                if (client->noClientException != Success)
                    return(client->noClientException);
                else
                  return(retval);
          }
#ifdef PANORAMIX
          if (noPanoramiXExtension || !pcmp->pScreen->myNum)
#endif
            WriteReplyToClient(client, sizeof (xAllocNamedColorReply), &ancr);
          return (client->noClientException);
      }
      else
          return(BadName);
      
    }
    else
    {
        client->errorValue = stuff->cmap;
        return (BadColor);
    }
}

int
ProcAllocColorCells           (client)
    register ClientPtr client;
{
    ColormapPtr pcmp;
    REQUEST(xAllocColorCellsReq);

    REQUEST_SIZE_MATCH(xAllocColorCellsReq);
    pcmp = (ColormapPtr)SecurityLookupIDByType(client, stuff->cmap,
                              RT_COLORMAP, SecurityWriteAccess);
    if (pcmp)
    {
      xAllocColorCellsReply   accr;
      int               npixels, nmasks, retval;
      long              length;
      Pixel             *ppixels, *pmasks;

#ifdef LBX
      /*
       * If the colormap is grabbed by a proxy, the server will have
       * to regain control over the colormap.  This AllocColorCells request
       * will be handled after the server gets back the colormap control.
       */
      if (LbxCheckColorRequest (client, pcmp, (xReq *) stuff))
          return Success;
#endif
      npixels = stuff->colors;
      if (!npixels)
      {
          client->errorValue = npixels;
          return (BadValue);
      }
      if (stuff->contiguous != xTrue && stuff->contiguous != xFalse)
      {
          client->errorValue = stuff->contiguous;
          return (BadValue);
      }
      nmasks = stuff->planes;
      length = ((long)npixels + (long)nmasks) * sizeof(Pixel);
      ppixels = (Pixel *)ALLOCATE_LOCAL(length);
      if(!ppixels)
            return(BadAlloc);
      pmasks = ppixels + npixels;

      if( (retval = AllocColorCells(client->index, pcmp, npixels, nmasks, 
                            (Bool)stuff->contiguous, ppixels, pmasks)) )
      {
          DEALLOCATE_LOCAL(ppixels);
            if (client->noClientException != Success)
                return(client->noClientException);
          else
              return(retval);
      }
#ifdef PANORAMIX
      if (noPanoramiXExtension || !pcmp->pScreen->myNum)
#endif
      {
          accr.type = X_Reply;
          accr.length = length >> 2;
          accr.sequenceNumber = client->sequence;
          accr.nPixels = npixels;
          accr.nMasks = nmasks;
          WriteReplyToClient(client, sizeof (xAllocColorCellsReply), &accr);
          client->pSwapReplyFunc = (ReplySwapPtr) Swap32Write;
          WriteSwappedDataToClient(client, length, ppixels);
      }
      DEALLOCATE_LOCAL(ppixels);
        return (client->noClientException);        
    }
    else
    {
        client->errorValue = stuff->cmap;
        return (BadColor);
    }
}

int
ProcAllocColorPlanes(client)
    register ClientPtr client;
{
    ColormapPtr pcmp;
    REQUEST(xAllocColorPlanesReq);

    REQUEST_SIZE_MATCH(xAllocColorPlanesReq);
    pcmp = (ColormapPtr)SecurityLookupIDByType(client, stuff->cmap,
                              RT_COLORMAP, SecurityWriteAccess);
    if (pcmp)
    {
      xAllocColorPlanesReply  acpr;
      int               npixels, retval;
      long              length;
      Pixel             *ppixels;

#ifdef LBX
      /*
       * If the colormap is grabbed by a proxy, the server will have
       * to regain control over the colormap.  This AllocColorPlanes request
       * will be handled after the server gets back the colormap control.
       */
      if (LbxCheckColorRequest (client, pcmp, (xReq *) stuff))
          return Success;
#endif
      npixels = stuff->colors;
      if (!npixels)
      {
          client->errorValue = npixels;
          return (BadValue);
      }
      if (stuff->contiguous != xTrue && stuff->contiguous != xFalse)
      {
          client->errorValue = stuff->contiguous;
          return (BadValue);
      }
      acpr.type = X_Reply;
      acpr.sequenceNumber = client->sequence;
      acpr.nPixels = npixels;
      length = (long)npixels * sizeof(Pixel);
      ppixels = (Pixel *)ALLOCATE_LOCAL(length);
      if(!ppixels)
            return(BadAlloc);
      if( (retval = AllocColorPlanes(client->index, pcmp, npixels,
          (int)stuff->red, (int)stuff->green, (int)stuff->blue,
          (Bool)stuff->contiguous, ppixels,
          &acpr.redMask, &acpr.greenMask, &acpr.blueMask)) )
      {
            DEALLOCATE_LOCAL(ppixels);
            if (client->noClientException != Success)
                return(client->noClientException);
          else
              return(retval);
      }
      acpr.length = length >> 2;
#ifdef PANORAMIX
      if (noPanoramiXExtension || !pcmp->pScreen->myNum)
#endif
      {
          WriteReplyToClient(client, sizeof(xAllocColorPlanesReply), &acpr);
          client->pSwapReplyFunc = (ReplySwapPtr) Swap32Write;
          WriteSwappedDataToClient(client, length, ppixels);
      }
      DEALLOCATE_LOCAL(ppixels);
        return (client->noClientException);        
    }
    else
    {
        client->errorValue = stuff->cmap;
        return (BadColor);
    }
}

int
ProcFreeColors          (client)
    register ClientPtr client;
{
    ColormapPtr pcmp;
    REQUEST(xFreeColorsReq);

    REQUEST_AT_LEAST_SIZE(xFreeColorsReq);
    pcmp = (ColormapPtr)SecurityLookupIDByType(client, stuff->cmap,
                              RT_COLORMAP, SecurityWriteAccess);
    if (pcmp)
    {
      int   count;
        int     retval;

      if(pcmp->flags & AllAllocated)
          return(BadAccess);
      count = ((client->req_len << 2)- sizeof(xFreeColorsReq)) >> 2;
      retval =  FreeColors(pcmp, client->index, count,
          (Pixel *)&stuff[1], (Pixel)stuff->planeMask);
        if (client->noClientException != Success)
            return(client->noClientException);
        else
      {
          client->errorValue = clientErrorValue;
            return(retval);
      }

    }
    else
    {
        client->errorValue = stuff->cmap;
        return (BadColor);
    }
}

int
ProcStoreColors               (client)
    register ClientPtr client;
{
    ColormapPtr pcmp;
    REQUEST(xStoreColorsReq);

    REQUEST_AT_LEAST_SIZE(xStoreColorsReq);
    pcmp = (ColormapPtr)SecurityLookupIDByType(client, stuff->cmap,
                              RT_COLORMAP, SecurityWriteAccess);
    if (pcmp)
    {
      int   count;
        int     retval;

        count = (client->req_len << 2) - sizeof(xStoreColorsReq);
      if (count % sizeof(xColorItem))
          return(BadLength);
      count /= sizeof(xColorItem);
      retval = StoreColors(pcmp, count, (xColorItem *)&stuff[1]);
        if (client->noClientException != Success)
            return(client->noClientException);
        else
      {
          client->errorValue = clientErrorValue;
            return(retval);
      }
    }
    else
    {
        client->errorValue = stuff->cmap;
        return (BadColor);
    }
}

int
ProcStoreNamedColor           (client)
    register ClientPtr client;
{
    ColormapPtr pcmp;
    REQUEST(xStoreNamedColorReq);

    REQUEST_FIXED_SIZE(xStoreNamedColorReq, stuff->nbytes);
    pcmp = (ColormapPtr)SecurityLookupIDByType(client, stuff->cmap,
                              RT_COLORMAP, SecurityWriteAccess);
    if (pcmp)
    {
      xColorItem  def;
        int             retval;

      if(OsLookupColor(pcmp->pScreen->myNum, (char *)&stuff[1],
                       stuff->nbytes, &def.red, &def.green, &def.blue))
      {
          def.flags = stuff->flags;
          def.pixel = stuff->pixel;
          retval = StoreColors(pcmp, 1, &def);
            if (client->noClientException != Success)
                return(client->noClientException);
          else
            return(retval);
      }
        return (BadName);        
    }
    else
    {
        client->errorValue = stuff->cmap;
        return (BadColor);
    }
}

int
ProcQueryColors(client)
    register ClientPtr client;
{
    ColormapPtr pcmp;
    REQUEST(xQueryColorsReq);

    REQUEST_AT_LEAST_SIZE(xQueryColorsReq);
    pcmp = (ColormapPtr)SecurityLookupIDByType(client, stuff->cmap,
                              RT_COLORMAP, SecurityReadAccess);
    if (pcmp)
    {
      int               count, retval;
      xrgb              *prgbs;
      xQueryColorsReply qcr;

      count = ((client->req_len << 2) - sizeof(xQueryColorsReq)) >> 2;
      prgbs = (xrgb *)ALLOCATE_LOCAL(count * sizeof(xrgb));
      if(!prgbs && count)
            return(BadAlloc);
      if( (retval = QueryColors(pcmp, count, (Pixel *)&stuff[1], prgbs)) )
      {
          if (prgbs) DEALLOCATE_LOCAL(prgbs);
          if (client->noClientException != Success)
                return(client->noClientException);
          else
          {
            client->errorValue = clientErrorValue;
              return (retval);
          }
      }
      qcr.type = X_Reply;
      qcr.length = (count * sizeof(xrgb)) >> 2;
      qcr.sequenceNumber = client->sequence;
      qcr.nColors = count;
      WriteReplyToClient(client, sizeof(xQueryColorsReply), &qcr);
      if (count)
      {
          client->pSwapReplyFunc = (ReplySwapPtr) SQColorsExtend;
          WriteSwappedDataToClient(client, count * sizeof(xrgb), prgbs);
      }
      if (prgbs) DEALLOCATE_LOCAL(prgbs);
      return(client->noClientException);
      
    }
    else
    {
        client->errorValue = stuff->cmap;
        return (BadColor);
    }
} 

int
ProcLookupColor(client)
    register ClientPtr client;
{
    ColormapPtr pcmp;
    REQUEST(xLookupColorReq);

    REQUEST_FIXED_SIZE(xLookupColorReq, stuff->nbytes);
    pcmp = (ColormapPtr)SecurityLookupIDByType(client, stuff->cmap,
                              RT_COLORMAP, SecurityReadAccess);
    if (pcmp)
    {
      xLookupColorReply lcr;

      if(OsLookupColor(pcmp->pScreen->myNum, (char *)&stuff[1], stuff->nbytes,
                       &lcr.exactRed, &lcr.exactGreen, &lcr.exactBlue))
      {
          lcr.type = X_Reply;
          lcr.length = 0;
          lcr.sequenceNumber = client->sequence;
          lcr.screenRed = lcr.exactRed;
          lcr.screenGreen = lcr.exactGreen;
          lcr.screenBlue = lcr.exactBlue;
          (*pcmp->pScreen->ResolveColor)(&lcr.screenRed,
                                         &lcr.screenGreen,
                                 &lcr.screenBlue,
                                 pcmp->pVisual);
          WriteReplyToClient(client, sizeof(xLookupColorReply), &lcr);
          return(client->noClientException);
      }
        return (BadName);        
    }
    else
    {
        client->errorValue = stuff->cmap;
        return (BadColor);
    }
}

int
ProcCreateCursor( client)
    register ClientPtr client;
{
    CursorPtr     pCursor;

    register PixmapPtr  src;
    register PixmapPtr  msk;
    unsigned char *     srcbits;
    unsigned char *     mskbits;
    unsigned short      width, height;
    long          n;
    CursorMetricRec cm;


    REQUEST(xCreateCursorReq);

    REQUEST_SIZE_MATCH(xCreateCursorReq);
    LEGAL_NEW_RESOURCE(stuff->cid, client);

    src = (PixmapPtr)SecurityLookupIDByType(client, stuff->source,
                                    RT_PIXMAP, SecurityReadAccess);
    msk = (PixmapPtr)SecurityLookupIDByType(client, stuff->mask,
                                    RT_PIXMAP, SecurityReadAccess);
    if (   src == (PixmapPtr)NULL)
    {
      client->errorValue = stuff->source;
      return (BadPixmap);
    }
    if ( msk == (PixmapPtr)NULL)
    {
      if (stuff->mask != None)
      {
          client->errorValue = stuff->mask;
          return (BadPixmap);
      }
    }
    else if (  src->drawable.width != msk->drawable.width
          || src->drawable.height != msk->drawable.height
          || src->drawable.depth != 1
          || msk->drawable.depth != 1)
      return (BadMatch);

    width = src->drawable.width;
    height = src->drawable.height;

    if ( stuff->x > width 
      || stuff->y > height )
      return (BadMatch);

    n = BitmapBytePad(width)*height;
    srcbits = (unsigned char *)xalloc(n);
    if (!srcbits)
      return (BadAlloc);
    mskbits = (unsigned char *)xalloc(n);
    if (!mskbits)
    {
      xfree(srcbits);
      return (BadAlloc);
    }

    /* zeroing the (pad) bits helps some ddx cursor handling */
    bzero((char *)srcbits, n);
    (* src->drawable.pScreen->GetImage)( (DrawablePtr)src, 0, 0, width, height,
                               XYPixmap, 1, (pointer)srcbits);
    if ( msk == (PixmapPtr)NULL)
    {
      register unsigned char *bits = mskbits;
      while (--n >= 0)
          *bits++ = ~0;
    }
    else
    {
      /* zeroing the (pad) bits helps some ddx cursor handling */
      bzero((char *)mskbits, n);
      (* msk->drawable.pScreen->GetImage)( (DrawablePtr)msk, 0, 0, width,
                              height, XYPixmap, 1, (pointer)mskbits);
    }
    cm.width = width;
    cm.height = height;
    cm.xhot = stuff->x;
    cm.yhot = stuff->y;
    pCursor = AllocCursor( srcbits, mskbits, &cm,
          stuff->foreRed, stuff->foreGreen, stuff->foreBlue,
          stuff->backRed, stuff->backGreen, stuff->backBlue);

    if (pCursor && AddResource(stuff->cid, RT_CURSOR, (pointer)pCursor))
          return (client->noClientException);
    return BadAlloc;
}

int
ProcCreateGlyphCursor( client)
    register ClientPtr client;
{
    CursorPtr pCursor;
    int res;

    REQUEST(xCreateGlyphCursorReq);

    REQUEST_SIZE_MATCH(xCreateGlyphCursorReq);
    LEGAL_NEW_RESOURCE(stuff->cid, client);

    res = AllocGlyphCursor(stuff->source, stuff->sourceChar,
                     stuff->mask, stuff->maskChar,
                     stuff->foreRed, stuff->foreGreen, stuff->foreBlue,
                     stuff->backRed, stuff->backGreen, stuff->backBlue,
                     &pCursor, client);
    if (res != Success)
      return res;
    if (AddResource(stuff->cid, RT_CURSOR, (pointer)pCursor))
      return client->noClientException;
    return BadAlloc;
}


int
ProcFreeCursor(client)
    register ClientPtr client;
{
    CursorPtr pCursor;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pCursor = (CursorPtr)SecurityLookupIDByType(client, stuff->id,
                              RT_CURSOR, SecurityDestroyAccess);
    if (pCursor) 
    {
      FreeResource(stuff->id, RT_NONE);
      return (client->noClientException);
    }
    else 
    {
      client->errorValue = stuff->id;
      return (BadCursor);
    }
}

int
ProcQueryBestSize   (client)
    register ClientPtr client;
{
    xQueryBestSizeReply reply;
    register DrawablePtr pDraw;
    ScreenPtr pScreen;
    REQUEST(xQueryBestSizeReq);

    REQUEST_SIZE_MATCH(xQueryBestSizeReq);
    if ((stuff->class != CursorShape) && 
      (stuff->class != TileShape) && 
      (stuff->class != StippleShape))
    {
      client->errorValue = stuff->class;
        return(BadValue);
    }
    SECURITY_VERIFY_GEOMETRABLE (pDraw, stuff->drawable, client,
                         SecurityReadAccess);
    if (stuff->class != CursorShape && pDraw->type == UNDRAWABLE_WINDOW)
      return (BadMatch);
    pScreen = pDraw->pScreen;
    (* pScreen->QueryBestSize)(stuff->class, &stuff->width,
                         &stuff->height, pScreen);
    reply.type = X_Reply;
    reply.length = 0;
    reply.sequenceNumber = client->sequence;
    reply.width = stuff->width;
    reply.height = stuff->height;
    WriteReplyToClient(client, sizeof(xQueryBestSizeReply), &reply);
    return (client->noClientException);
}


int
ProcSetScreenSaver            (client)
    register ClientPtr client;
{
    int blankingOption, exposureOption;
    REQUEST(xSetScreenSaverReq);

    REQUEST_SIZE_MATCH(xSetScreenSaverReq);
    blankingOption = stuff->preferBlank;
    if ((blankingOption != DontPreferBlanking) &&
        (blankingOption != PreferBlanking) &&
        (blankingOption != DefaultBlanking))
    {
      client->errorValue = blankingOption;
        return BadValue;
    }
    exposureOption = stuff->allowExpose;
    if ((exposureOption != DontAllowExposures) &&
        (exposureOption != AllowExposures) &&
        (exposureOption != DefaultExposures))
    {
      client->errorValue = exposureOption;
        return BadValue;
    }
    if (stuff->timeout < -1)
    {
      client->errorValue = stuff->timeout;
        return BadValue;
    }
    if (stuff->interval < -1)
    {
      client->errorValue = stuff->interval;
        return BadValue;
    }

    if (blankingOption == DefaultBlanking)
      ScreenSaverBlanking = defaultScreenSaverBlanking;
    else
      ScreenSaverBlanking = blankingOption; 
    if (exposureOption == DefaultExposures)
      ScreenSaverAllowExposures = defaultScreenSaverAllowExposures;
    else
      ScreenSaverAllowExposures = exposureOption;

    if (stuff->timeout >= 0)
      ScreenSaverTime = stuff->timeout * MILLI_PER_SECOND;
    else 
      ScreenSaverTime = defaultScreenSaverTime;
    if (stuff->interval >= 0)
      ScreenSaverInterval = stuff->interval * MILLI_PER_SECOND;
    else
      ScreenSaverInterval = defaultScreenSaverInterval;
    return (client->noClientException);
}

int
ProcGetScreenSaver(client)
    register ClientPtr client;
{
    xGetScreenSaverReply rep;

    REQUEST_SIZE_MATCH(xReq);
    rep.type = X_Reply;
    rep.length = 0;
    rep.sequenceNumber = client->sequence;
    rep.timeout = ScreenSaverTime / MILLI_PER_SECOND;
    rep.interval = ScreenSaverInterval / MILLI_PER_SECOND;
    rep.preferBlanking = ScreenSaverBlanking;
    rep.allowExposures = ScreenSaverAllowExposures;
    WriteReplyToClient(client, sizeof(xGetScreenSaverReply), &rep);
    return (client->noClientException);
}

int
ProcChangeHosts(client)
    register ClientPtr client;
{
    REQUEST(xChangeHostsReq);
    int result;

    REQUEST_FIXED_SIZE(xChangeHostsReq, stuff->hostLength);

    if(stuff->mode == HostInsert)
      result = AddHost(client, (int)stuff->hostFamily,
                   stuff->hostLength, (pointer)&stuff[1]);
    else if (stuff->mode == HostDelete)
      result = RemoveHost(client, (int)stuff->hostFamily, 
                      stuff->hostLength, (pointer)&stuff[1]);  
    else
    {
      client->errorValue = stuff->mode;
        return BadValue;
    }
    if (!result)
      result = client->noClientException;
    return (result);
}

int
ProcListHosts(client)
    register ClientPtr client;
{
    xListHostsReply reply;
    int     len, nHosts, result;
    pointer pdata;
    /* REQUEST(xListHostsReq); */

    REQUEST_SIZE_MATCH(xListHostsReq);
#ifdef XCSECURITY
    /* untrusted clients can't list hosts */
    if (client->trustLevel != XSecurityClientTrusted)
    {
      SecurityAudit("client %d attempted to list hosts\n", client->index);
      return BadAccess;
    }
#endif
    result = GetHosts(&pdata, &nHosts, &len, &reply.enabled);
    if (result != Success)
      return(result);
    reply.type = X_Reply;
    reply.sequenceNumber = client->sequence;
    reply.nHosts = nHosts;
    reply.length = len >> 2;
    WriteReplyToClient(client, sizeof(xListHostsReply), &reply);
    if (nHosts)
    {
      client->pSwapReplyFunc = (ReplySwapPtr) SLHostsExtend;
      WriteSwappedDataToClient(client, len, pdata);
    }
    xfree(pdata);
    return (client->noClientException);
}

int
ProcChangeAccessControl(client)
    register ClientPtr client;
{
    int result;
    REQUEST(xSetAccessControlReq);

    REQUEST_SIZE_MATCH(xSetAccessControlReq);
    if ((stuff->mode != EnableAccess) && (stuff->mode != DisableAccess))
    {
      client->errorValue = stuff->mode;
        return BadValue;
    }
    result = ChangeAccessControl(client, stuff->mode == EnableAccess);
    if (!result)
      result = client->noClientException;
    return (result);
}

int
ProcKillClient(client)
    register ClientPtr client;
{
    REQUEST(xResourceReq);
    ClientPtr     killclient;

    REQUEST_SIZE_MATCH(xResourceReq);
    if (stuff->id == AllTemporary)
    {
      CloseDownRetainedResources();
        return (client->noClientException);
    }

    if ((killclient = LookupClient(stuff->id, client)))
    {
      CloseDownClient(killclient);
      /* if an LBX proxy gets killed, isItTimeToYield will be set */
      if (isItTimeToYield || (client == killclient))
      {
          /* force yield and return Success, so that Dispatch()
           * doesn't try to touch client
           */
          isItTimeToYield = TRUE;
          return (Success);
      }
      return (client->noClientException);
    }
    else
    {
      client->errorValue = stuff->id;
      return (BadValue);
    }
}

int
ProcSetFontPath(client)
    register ClientPtr client;
{
    unsigned char *ptr;
    unsigned long nbytes, total;
    long nfonts;
    int n, result;
    int error;
    REQUEST(xSetFontPathReq);
    
    REQUEST_AT_LEAST_SIZE(xSetFontPathReq);
    
    nbytes = (client->req_len << 2) - sizeof(xSetFontPathReq);
    total = nbytes;
    ptr = (unsigned char *)&stuff[1];
    nfonts = stuff->nFonts;
    while (--nfonts >= 0)
    {
      if ((total == 0) || (total < (n = (*ptr + 1))))
          return(BadLength);
      total -= n;
      ptr += n;
    }
    if (total >= 4)
      return(BadLength);
    result = SetFontPath(client, stuff->nFonts, (unsigned char *)&stuff[1],
                   &error);
    if (!result)
    {
      result = client->noClientException;
      client->errorValue = error;
    }
    return (result);
}

int
ProcGetFontPath(client)
    register ClientPtr client;
{
    xGetFontPathReply reply;
    int stringLens, numpaths;
    unsigned char *bufferStart;
    /* REQUEST (xReq); */

    REQUEST_SIZE_MATCH(xReq);
    bufferStart = GetFontPath(&numpaths, &stringLens);

    reply.type = X_Reply;
    reply.sequenceNumber = client->sequence;
    reply.length = (stringLens + numpaths + 3) >> 2;
    reply.nPaths = numpaths;

    WriteReplyToClient(client, sizeof(xGetFontPathReply), &reply);
    if (stringLens || numpaths)
      (void)WriteToClient(client, stringLens + numpaths, (char *)bufferStart);
    return(client->noClientException);
}

int
ProcChangeCloseDownMode(client)
    register ClientPtr client;
{
    REQUEST(xSetCloseDownModeReq);

    REQUEST_SIZE_MATCH(xSetCloseDownModeReq);
    if ((stuff->mode == AllTemporary) ||
      (stuff->mode == RetainPermanent) ||
      (stuff->mode == RetainTemporary))
    {
      client->closeDownMode = stuff->mode;
      return (client->noClientException);
    }
    else   
    {
      client->errorValue = stuff->mode;
      return (BadValue);
    }
}

int ProcForceScreenSaver(client)
    register ClientPtr client;
{    
    REQUEST(xForceScreenSaverReq);

    REQUEST_SIZE_MATCH(xForceScreenSaverReq);
    
    if ((stuff->mode != ScreenSaverReset) && 
      (stuff->mode != ScreenSaverActive))
    {
      client->errorValue = stuff->mode;
        return BadValue;
    }
    SaveScreens(SCREEN_SAVER_FORCER, (int)stuff->mode);
    return client->noClientException;
}

int ProcNoOperation(client)
    register ClientPtr client;
{
    REQUEST_AT_LEAST_SIZE(xReq);
    
    /* noop -- don't do anything */
    return(client->noClientException);
}

void
InitProcVectors(void)
{
    int i;
    for (i = 0; i<256; i++)
    {
      if(!ProcVector[i])
      {
            ProcVector[i] = SwappedProcVector[i] = ProcBadRequest;
          ReplySwapVector[i] = ReplyNotSwappd;
      }
#ifdef K5AUTH
      if (!k5_Vector[i])
      {
          k5_Vector[i] = k5_bad;
      }
#endif
    }
    for(i = LASTEvent; i < 128; i++)
    {
      EventSwapVector[i] = NotImplemented;
    }
    
}

/**********************
 * CloseDownClient
 *
 *  Client can either mark his resources destroy or retain.  If retained and
 *  then killed again, the client is really destroyed.
 *********************/

char dispatchExceptionAtReset = DE_RESET;

void
CloseDownClient(client)
    register ClientPtr client;
{
    Bool really_close_down = client->clientGone ||
                       client->closeDownMode == DestroyAll;

    if (!client->clientGone)
    {
      /* ungrab server if grabbing client dies */
      if (grabState != GrabNone && grabClient == client)
      {
          UngrabServer(client);
      }
      BITCLEAR(grabWaiters, client->index);
      DeleteClientFromAnySelections(client);
      ReleaseActiveGrabs(client);
      DeleteClientFontStuff(client);
      if (!really_close_down)
      {
          /*  This frees resources that should never be retained
           *  no matter what the close down mode is.  Actually we
           *  could do this unconditionally, but it's probably
           *  better not to traverse all the client's resources
           *  twice (once here, once a few lines down in
           *  FreeClientResources) in the common case of
           *  really_close_down == TRUE.
           */
          FreeClientNeverRetainResources(client);
          client->clientState = ClientStateRetained;
          if (ClientStateCallback)
            {
            NewClientInfoRec clientinfo;

            clientinfo.client = client; 
            clientinfo.prefix = (xConnSetupPrefix *)NULL;  
            clientinfo.setup = (xConnSetup *) NULL;
            CallCallbacks((&ClientStateCallback), (pointer)&clientinfo);
            } 
      }
      client->clientGone = TRUE;  /* so events aren't sent to client */
      if (ClientIsAsleep(client))
          ClientSignal (client);
      ProcessWorkQueueZombies();
#ifdef LBX
      ProcessQTagZombies();
#endif
      CloseDownConnection(client);

      /* If the client made it to the Running stage, nClients has
       * been incremented on its behalf, so we need to decrement it
       * now.  If it hasn't gotten to Running, nClients has *not*
       * been incremented, so *don't* decrement it.
       */
      if (client->clientState != ClientStateInitial &&
          client->clientState != ClientStateAuthenticating )
      {
          --nClients;
      }
    }

    if (really_close_down)
    {
      if (client->clientState == ClientStateRunning && nClients == 0)
          dispatchException |= dispatchExceptionAtReset;

      client->clientState = ClientStateGone;
      if (ClientStateCallback)
      {
          NewClientInfoRec clientinfo;

          clientinfo.client = client; 
          clientinfo.prefix = (xConnSetupPrefix *)NULL;  
          clientinfo.setup = (xConnSetup *) NULL;
          CallCallbacks((&ClientStateCallback), (pointer)&clientinfo);
      }         
      FreeClientResources(client);
      if (client->index < nextFreeClientID)
          nextFreeClientID = client->index;
      clients[client->index] = NullClient;
#ifdef SMART_SCHEDULE
      SmartLastClient = NullClient;
#endif
      xfree(client);

      while (!clients[currentMaxClients-1])
          currentMaxClients--;
    }
}

static void
KillAllClients()
{
    int i;
    for (i=1; i<currentMaxClients; i++)
        if (clients[i]) {
            /* Make sure Retained clients are released. */
            clients[i]->closeDownMode = DestroyAll;
            CloseDownClient(clients[i]);     
        }
}

/*********************
 * CloseDownRetainedResources
 *
 *    Find all clients that are gone and have terminated in RetainTemporary 
 *    and  destroy their resources.
 *********************/

void
CloseDownRetainedResources()
{
    register int i;
    register ClientPtr client;

    for (i=1; i<currentMaxClients; i++)
    {
        client = clients[i];
        if (client && (client->closeDownMode == RetainTemporary)
          && (client->clientGone))
          CloseDownClient(client);
    }
}

void InitClient(client, i, ospriv)
    ClientPtr client;
    int i;
    pointer ospriv;
{
    client->index = i;
    client->sequence = 0; 
    client->clientAsMask = ((Mask)i) << CLIENTOFFSET;
    client->clientGone = FALSE;
    if (i)
    {
      client->closeDownMode = DestroyAll;
      client->lastDrawable = (DrawablePtr)WindowTable[0];
      client->lastDrawableID = WindowTable[0]->drawable.id;
    }
    else
    {
      client->closeDownMode = RetainPermanent;
      client->lastDrawable = (DrawablePtr)NULL;
      client->lastDrawableID = INVALID;
    }
    client->lastGC = (GCPtr) NULL;
    client->lastGCID = INVALID;
    client->numSaved = 0;
    client->saveSet = (pointer *)NULL;
    client->noClientException = Success;
#ifdef DEBUG
    client->requestLogIndex = 0;
#endif
    client->requestVector = InitialVector;
    client->osPrivate = ospriv;
    client->swapped = FALSE;
    client->big_requests = FALSE;
    client->priority = 0;
    client->clientState = ClientStateInitial;
#ifdef XKB
    if (!noXkbExtension) {
      client->xkbClientFlags = 0;
      client->mapNotifyMask = 0;
      QueryMinMaxKeyCodes(&client->minKC,&client->maxKC);
    }
#endif
    client->replyBytesRemaining = 0;
#ifdef LBX
    client->readRequest = StandardReadRequestFromClient;
#endif
#ifdef XCSECURITY
    client->trustLevel = XSecurityClientTrusted;
    client->CheckAccess = NULL;
    client->authId = 0;
#endif
#ifdef XAPPGROUP
    client->appgroup = NULL;
#endif
    client->fontResFunc = NULL;
#ifdef SMART_SCHEDULE
    client->smart_priority = 0;
    client->smart_start_tick = SmartScheduleTime;
    client->smart_stop_tick = SmartScheduleTime;
    client->smart_check_tick = SmartScheduleTime;
#endif
}

extern int clientPrivateLen;
extern unsigned *clientPrivateSizes;
extern unsigned totalClientSize;

int
InitClientPrivates(client)
    ClientPtr client;
{
    register char *ptr;
    DevUnion *ppriv;
    register unsigned *sizes;
    register unsigned size;
    register int i;

    if (totalClientSize == sizeof(ClientRec))
      ppriv = (DevUnion *)NULL;
    else if (client->index)
      ppriv = (DevUnion *)(client + 1);
    else
    {
      ppriv = (DevUnion *)xalloc(totalClientSize - sizeof(ClientRec));
      if (!ppriv)
          return 0;
    }
    client->devPrivates = ppriv;
    sizes = clientPrivateSizes;
    ptr = (char *)(ppriv + clientPrivateLen);
    for (i = clientPrivateLen; --i >= 0; ppriv++, sizes++)
    {
      if ( (size = *sizes) )
      {
          ppriv->ptr = (pointer)ptr;
          ptr += size;
      }
      else
          ppriv->ptr = (pointer)NULL;
    }
    return 1;
}

/************************
 * int NextAvailableClient(ospriv)
 *
 * OS dependent portion can't assign client id's because of CloseDownModes.
 * Returns NULL if there are no free clients.
 *************************/

ClientPtr
NextAvailableClient(ospriv)
    pointer ospriv;
{
    register int i;
    register ClientPtr client;
    xReq data;

    i = nextFreeClientID;
    if (i == MAXCLIENTS)
      return (ClientPtr)NULL;
    clients[i] = client = (ClientPtr)xalloc(totalClientSize);
    if (!client)
      return (ClientPtr)NULL;
    InitClient(client, i, ospriv);
    InitClientPrivates(client);
    if (!InitClientResources(client))
    {
      xfree(client);
      return (ClientPtr)NULL;
    }
    data.reqType = 1;
    data.length = (sz_xReq + sz_xConnClientPrefix) >> 2;
    if (!InsertFakeRequest(client, (char *)&data, sz_xReq))
    {
      FreeClientResources(client);
      xfree(client);
      return (ClientPtr)NULL;
    }
    if (i == currentMaxClients)
      currentMaxClients++;
    while ((nextFreeClientID < MAXCLIENTS) && clients[nextFreeClientID])
      nextFreeClientID++;
    if (ClientStateCallback)
    {
      NewClientInfoRec clientinfo;

        clientinfo.client = client; 
        clientinfo.prefix = (xConnSetupPrefix *)NULL;  
        clientinfo.setup = (xConnSetup *) NULL;
      CallCallbacks((&ClientStateCallback), (pointer)&clientinfo);
    }       
    return(client);
}

int
ProcInitialConnection(client)
    register ClientPtr client;
{
    REQUEST(xReq);
    register xConnClientPrefix *prefix;
    int whichbyte = 1;

    prefix = (xConnClientPrefix *)((char *)stuff + sz_xReq);
    if ((prefix->byteOrder != 'l') && (prefix->byteOrder != 'B'))
      return (client->noClientException = -1);
    if (((*(char *) &whichbyte) && (prefix->byteOrder == 'B')) ||
      (!(*(char *) &whichbyte) && (prefix->byteOrder == 'l')))
    {
      client->swapped = TRUE;
      SwapConnClientPrefix(prefix);
    }
    stuff->reqType = 2;
    stuff->length += ((prefix->nbytesAuthProto + (unsigned)3) >> 2) +
                 ((prefix->nbytesAuthString + (unsigned)3) >> 2);
    if (client->swapped)
    {
      swaps(&stuff->length, whichbyte);
    }
    ResetCurrentRequest(client);
    return (client->noClientException);
}

#ifdef LBX
void
IncrementClientCount()
{
    nClients++;
}
#endif

int
SendConnSetup(client, reason)
    register ClientPtr client;
    char *reason;
{
    register xWindowRoot *root;
    register int i;
    int numScreens;
    char* lConnectionInfo;
    xConnSetupPrefix* lconnSetupPrefix;

    if (reason)
    {
      xConnSetupPrefix csp;

      csp.success = xFalse;
      csp.lengthReason = strlen(reason);
      csp.length = (csp.lengthReason + (unsigned)3) >> 2;
      csp.majorVersion = X_PROTOCOL;
      csp.minorVersion = X_PROTOCOL_REVISION;
      if (client->swapped)
          WriteSConnSetupPrefix(client, &csp);
      else
          (void)WriteToClient(client, sz_xConnSetupPrefix, (char *) &csp);
        (void)WriteToClient(client, (int)csp.lengthReason, reason);
      return (client->noClientException = -1);
    }

    numScreens = screenInfo.numScreens;
    lConnectionInfo = ConnectionInfo;
    lconnSetupPrefix = &connSetupPrefix;

    /* We're about to start speaking X protocol back to the client by
     * sending the connection setup info.  This means the authorization
     * step is complete, and we can count the client as an
     * authorized one.
     */
    nClients++;

    client->requestVector = client->swapped ? SwappedProcVector : ProcVector;
    client->sequence = 0;
#ifdef XAPPGROUP
    XagConnectionInfo (client, &lconnSetupPrefix, &lConnectionInfo, &numScreens);
#endif
    ((xConnSetup *)lConnectionInfo)->ridBase = client->clientAsMask;
    ((xConnSetup *)lConnectionInfo)->ridMask = RESOURCE_ID_MASK;
#ifdef MATCH_CLIENT_ENDIAN
    ((xConnSetup *)lConnectionInfo)->imageByteOrder = ClientOrder (client);
    ((xConnSetup *)lConnectionInfo)->bitmapBitOrder = ClientOrder (client);
#endif
    /* fill in the "currentInputMask" */
    root = (xWindowRoot *)(lConnectionInfo + connBlockScreenStart);
#ifdef PANORAMIX
    if (noPanoramiXExtension)
      numScreens = screenInfo.numScreens;
    else 
        numScreens = ((xConnSetup *)ConnectionInfo)->numRoots;
#endif

    for (i=0; i<numScreens; i++) 
    {
      register unsigned int j;
      register xDepth *pDepth;

        root->currentInputMask = WindowTable[i]->eventMask |
                           wOtherEventMasks (WindowTable[i]);
      pDepth = (xDepth *)(root + 1);
      for (j = 0; j < root->nDepths; j++)
      {
          pDepth = (xDepth *)(((char *)(pDepth + 1)) +
                        pDepth->nVisuals * sizeof(xVisualType));
      }
      root = (xWindowRoot *)pDepth;
    }

    if (client->swapped)
    {
      WriteSConnSetupPrefix(client, lconnSetupPrefix);
      WriteSConnectionInfo(client,
                       (unsigned long)(lconnSetupPrefix->length << 2),
                       lConnectionInfo);
    }
    else
    {
      (void)WriteToClient(client, sizeof(xConnSetupPrefix),
                      (char *) lconnSetupPrefix);
      (void)WriteToClient(client, (int)(lconnSetupPrefix->length << 2),
                      lConnectionInfo);
    }
    client->clientState = ClientStateRunning;
    if (ClientStateCallback)
    {
      NewClientInfoRec clientinfo;

        clientinfo.client = client; 
        clientinfo.prefix = lconnSetupPrefix;  
        clientinfo.setup = (xConnSetup *)lConnectionInfo;
      CallCallbacks((&ClientStateCallback), (pointer)&clientinfo);
    }       
    return (client->noClientException);
}

int
ProcEstablishConnection(client)
    register ClientPtr client;
{
    char *reason, *auth_proto, *auth_string;
    register xConnClientPrefix *prefix;
    REQUEST(xReq);

    prefix = (xConnClientPrefix *)((char *)stuff + sz_xReq);
    auth_proto = (char *)prefix + sz_xConnClientPrefix;
    auth_string = auth_proto + ((prefix->nbytesAuthProto + 3) & ~3);
    if ((prefix->majorVersion != X_PROTOCOL) ||
      (prefix->minorVersion != X_PROTOCOL_REVISION))
      reason = "Protocol version mismatch";
    else
      reason = ClientAuthorized(client,
                          (unsigned short)prefix->nbytesAuthProto,
                          auth_proto,
                          (unsigned short)prefix->nbytesAuthString,
                          auth_string);
    /*
     * If Kerberos is being used for this client, the clientState
     * will be set to ClientStateAuthenticating at this point.
     * More messages need to be exchanged among the X server, Kerberos
     * server, and client to figure out if everyone is authorized.
     * So we don't want to send the connection setup info yet, since
     * the auth step isn't really done.
     */
    if (client->clientState == ClientStateCheckingSecurity)
      client->clientState = ClientStateCheckedSecurity;
    else if (client->clientState != ClientStateAuthenticating)
      return(SendConnSetup(client, reason));
    return(client->noClientException);
}

void
SendErrorToClient(client, majorCode, minorCode, resId, errorCode)
    ClientPtr client;
    unsigned int majorCode;
    unsigned int minorCode;
    XID resId;
    int errorCode;
{
    xError rep;

    rep.type = X_Error;
    rep.sequenceNumber = client->sequence;
    rep.errorCode = errorCode;
    rep.majorCode = majorCode;
    rep.minorCode = minorCode;
    rep.resourceID = resId;

    WriteEventsToClient (client, 1, (xEvent *)&rep);
}

void
DeleteWindowFromAnySelections(pWin)
    WindowPtr pWin;
{
    register int i;

    for (i = 0; i< NumCurrentSelections; i++)
        if (CurrentSelections[i].pWin == pWin)
        {
            CurrentSelections[i].pWin = (WindowPtr)NULL;
            CurrentSelections[i].window = None;
          CurrentSelections[i].client = NullClient;
      }
}

static void
DeleteClientFromAnySelections(client)
    ClientPtr client;
{
    register int i;

    for (i = 0; i< NumCurrentSelections; i++)
        if (CurrentSelections[i].client == client)
        {
            CurrentSelections[i].pWin = (WindowPtr)NULL;
            CurrentSelections[i].window = None;
          CurrentSelections[i].client = NullClient;
      }
}

void
MarkClientException(client)
    ClientPtr client;
{
    client->noClientException = -1;
}

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