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

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) 1991, 1997 Digital Equipment Corporation, Maynard, Massachusetts.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software.

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
DIGITAL EQUIPMENT CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES, INCLUDING,
BUT NOT LIMITED TO CONSEQUENTIAL OR INCIDENTAL 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 Digital Equipment Corporation
shall not be used in advertising or otherwise to promote the sale, use or other
dealings in this Software without prior written authorization from Digital
Equipment Corporation.

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

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif


#include "windowstr.h"
#include <X11/fonts/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"

#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;

_X_EXPORT Selection *CurrentSelections;

_X_EXPORT int NumCurrentSelections;

CallbackListPtr SelectionCallback = NULL;

static ClientPtr grabClient;

#define GrabNone 0
#define GrabActive 1
#define GrabKickout 2
static int grabState = GrabNone;

static long grabWaiters[mskcnt];

_X_EXPORT CallbackListPtr ServerGrabCallback = NULL;

HWEventQueuePtr checkForInput[2];

extern int connBlockScreenStart;

static void KillAllClients(void);

static void DeleteClientFromAnySelections(ClientPtr client);

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

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

_X_EXPORT CallbackListPtr ClientStateCallback;

/* dispatchException & isItTimeToYield must be declared volatile since they
 * are modified by signal handlers - otherwise optimizer may assume it doesn't
 * need to actually check value in memory when used and may miss changes from
 * signal handlers.
 */
_X_EXPORT volatile char dispatchException = 0;

_X_EXPORT volatile 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))

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

_X_EXPORT 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 */
_X_EXPORT 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)
        free(CurrentSelections);
    CurrentSelections = (Selection *) NULL;
    NumCurrentSelections = 0;
}

void
FlushClientCaches(XID id)
{
    int i;

    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	7      /* ms */
#define SMART_SCHEDULE_MAX_SLICE	20     /* ms */

Bool SmartScheduleDisable = FALSE;

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);

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)
{
    int *clientReady;  /* array of request ready clients */

    int result;

    ClientPtr client;

    int nready;

    HWEventQueuePtr *icheck = checkForInput;

#ifdef SMART_SCHEDULE
    long 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 > (maxBigRequestSize << 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;
    ResetOsBuffers();
}

#undef MAJOROP

_X_EXPORT int
ProcBadRequest(ClientPtr client)
{
    return (BadRequest);
}

int
ProcCreateWindow(ClientPtr client)
{
    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(register ClientPtr client)
{
    WindowPtr pWin;

    REQUEST(xChangeWindowAttributesReq);
    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(register ClientPtr client)
{
    WindowPtr pWin;

    REQUEST(xResourceReq);
    xGetWindowAttributesReply wa = {0};

    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(register ClientPtr client)
{
    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(register ClientPtr client)
{
    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(register ClientPtr client)
{
    WindowPtr pWin;

    REQUEST(xChangeSaveSetReq);
    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, FALSE, TRUE);
        if (client->noClientException != Success)
            return (client->noClientException);
        else
            return (result);
    }
    else {
        client->errorValue = stuff->mode;
        return (BadValue);
    }
}

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

    REQUEST(xReparentWindowReq);
    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(register ClientPtr client)
{
    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(register ClientPtr client)
{
    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(register ClientPtr client)
{
    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(register ClientPtr client)
{
    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(register ClientPtr client)
{
    WindowPtr pWin;

    REQUEST(xConfigureWindowReq);
    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(register ClientPtr client)
{
    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(register ClientPtr client, xGetGeometryReply * rep)
{
    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))) {
        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(register ClientPtr client)
{
    xGetGeometryReply rep = {0};

    int status;

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

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

int
ProcQueryTree(register ClientPtr client)
{
    xQueryTreeReply reply;

    int numChildren = 0;

    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(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 = {0};

        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(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);
    }
}


int
ProcSetSelectionOwner(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 = malloc(sizeof(Selection));
            else
                newsels = (Selection *) realloc(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);
        if (SelectionCallback) {
            SelectionInfoRec info;

            info.selection = &CurrentSelections[i];
            info.kind = SelectionSetOwner;
            CallCallbacks(&SelectionCallback, &info);
        }
        return (client->noClientException);
    }
    else {
        client->errorValue = stuff->selection;
        return (BadAtom);
    }
}

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

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

    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) {
            BoxRec box;
            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))
                /* When a window is shaped, a further check
                 * is made to see if the point is inside
                 * borderSize
                 */
                && (!wBoundingShape(pWin) ||
                    POINT_IN_REGION(
                                    &pWin->borderSize, x, y, &box))

                && (!wInputShape(pWin) ||
                    POINT_IN_REGION(
                                    wInputShape(pWin),
                                    x - pWin->drawable.x,
                                    y - pWin->drawable.y, &box))
                ) {
                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(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(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(register ClientPtr client)
{
    xQueryFontReply *reply;

    FontPtr pFont;

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

    REQUEST_FIXED_SIZE(xListFontsReq, stuff->nbytes);

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

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

    REQUEST_FIXED_SIZE(xListFontsWithInfoReq, stuff->nbytes);

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

/**
 *
 *  \param value must conform to DeleteType
 */
int
dixDestroyPixmap(pointer value, XID pid)
{
    PixmapPtr pPixmap = (PixmapPtr) value;

    return (*pPixmap->drawable.pScreen->DestroyPixmap) (pPixmap);
}

int
ProcCreatePixmap(register ClientPtr client)
{
    PixmapPtr pMap;

    DrawablePtr pDraw;

    REQUEST(xCreatePixmapReq);
    DepthPtr pDepth;

    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->width > 32767 || stuff->height > 32767) {
        /* It is allowed to try and allocate a pixmap which is larger than
         * 32767 in either dimension. However, all of the framebuffer code
         * is buggy and does not reliably draw to such big pixmaps, basically
         * because the Region data structure operates with signed shorts
         * for the rectangles in it.
         *
         * Furthermore, several places in the X server computes the
         * size in bytes of the pixmap and tries to store it in an
         * integer. This integer can overflow and cause the allocated size
         * to be much smaller.
         *
         * So, such big pixmaps are rejected here with a BadAlloc
         */
        return BadAlloc;
    }
    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(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(register ClientPtr client)
{
    int error;

    GC *pGC;

    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(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(register ClientPtr client)
{
    GC *dstGC;

    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(register ClientPtr client)
{
    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(register ClientPtr client)
{
    int nr;

    int result;

    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(register ClientPtr client)
{
    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(register ClientPtr client)
{
    REQUEST(xClearAreaReq);
    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(register ClientPtr client)
{
    DrawablePtr pDst;

    DrawablePtr pSrc;

    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(pRgn);
    }

    return (client->noClientException);
}

int
ProcCopyPlane(register ClientPtr client)
{
    DrawablePtr psrcDraw, pdstDraw;

    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(pRgn);
    }
    return (client->noClientException);
}

int
ProcPolyPoint(register ClientPtr client)
{
    int npoint;

    GC *pGC;

    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(register ClientPtr client)
{
    int npoint;

    GC *pGC;

    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(register ClientPtr client)
{
    int nsegs;

    GC *pGC;

    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(register ClientPtr client)
{
    int nrects;

    GC *pGC;

    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(register ClientPtr client)
{
    int narcs;

    GC *pGC;

    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(register ClientPtr client)
{
    int things;

    GC *pGC;

    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(register ClientPtr client)
{
    int things;

    GC *pGC;

    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(register ClientPtr client)
{
    int narcs;

    GC *pGC;

    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(register ClientPtr client)
{
    GC *pGC;

    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(register ClientPtr client, int format, Drawable drawable,
           int x, int y, int width, int height,
           Mask planemask, xGetImageReply ** im_return)
{
    DrawablePtr pDraw;

    int nlines, linesPerBuf;

    int linesDone;

    long widthBytesLine, length;

    Mask plane = 0;

    char *pBuf;

    xGetImageReply xgi;


    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 = malloc(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);
    }


    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);

            /* 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);

                    /* 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;
                }
            }
        }
    }
    if (!im_return)
        DEALLOCATE_LOCAL(pBuf);
    return (client->noClientException);
}

int
ProcGetImage(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(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(register ClientPtr client)
{
    int err;

    DrawablePtr pDraw;

    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(register ClientPtr client)
{
    int err;

    DrawablePtr pDraw;

    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(register ClientPtr client)
{
    VisualPtr pVisual;

    ColormapPtr pmap;

    Colormap mid;

    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 (BadMatch);
}

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

    int retval;

    xAllocColorReply acr = {0};

    REQUEST(xAllocColorReq);

    REQUEST_SIZE_MATCH(xAllocColorReq);
    pmap = (ColormapPtr) SecurityLookupIDByType(client, stuff->cmap,
                                                RT_COLORMAP,
                                                SecurityWriteAccess);
    if (pmap) {
        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);
        }
            WriteReplyToClient(client, sizeof(xAllocColorReply), &acr);
        return (client->noClientException);

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

int
ProcAllocNamedColor(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;

        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);
            }
                WriteReplyToClient(client, sizeof(xAllocNamedColorReply),
                                   &ancr);
            return (client->noClientException);
        }
        else
            return (BadName);

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

int
ProcAllocColorCells(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;

        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);
        }
        {
            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(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;

        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;
        {
            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(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(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(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(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 = {0};

        count = ((client->req_len << 2) - sizeof(xQueryColorsReq)) >> 2;
        prgbs = (xrgb *) ALLOCATE_LOCAL(count * sizeof(xrgb));
        memset(prgbs, 0, 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(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 = {0};

        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(register ClientPtr client)
{
    CursorPtr pCursor;

    PixmapPtr src;

    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 = malloc(n);
    if (!srcbits)
        return (BadAlloc);
    mskbits = malloc(n);
    if (!mskbits) {
        free(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) {
        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(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(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(register ClientPtr client)
{
    xQueryBestSizeReply reply = {0};

    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(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;

    SetScreenSaverTimer();
    return (client->noClientException);
}

int
ProcGetScreenSaver(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(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(register ClientPtr client)
{
    xListHostsReply reply;

    int len, nHosts, result;

    pointer pdata;

    /* REQUEST(xListHostsReq); */

    REQUEST_SIZE_MATCH(xListHostsReq);
    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);
    }
    free(pdata);
    return (client->noClientException);
}

int
ProcChangeAccessControl(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(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(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(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(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(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(register ClientPtr client)
{
    REQUEST_AT_LEAST_SIZE(xReq);

    /* noop -- don't do anything */
    return (client->noClientException);
}

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

char dispatchExceptionAtReset = 0;

void
CloseDownClient(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();
        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
        free(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()
{
    int i;

    ClientPtr client;

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

extern int clientPrivateLen;

extern unsigned *clientPrivateSizes;

extern unsigned totalClientSize;

void
InitClient(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 = (SaveSetElt *) 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;
    client->replyBytesRemaining = 0;
    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
}

int
InitClientPrivates(ClientPtr client)
{
    char *ptr;

    DevUnion *ppriv;

    unsigned *sizes;

    unsigned size;

    int i;

    if (totalClientSize == sizeof(ClientRec))
        ppriv = (DevUnion *) NULL;
    else if (client->index)
        ppriv = (DevUnion *) (client + 1);
    else {
        ppriv = malloc(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;
    }

    /* Allow registrants to initialize the serverClient devPrivates */
    if (!client->index && ClientStateCallback) {
        NewClientInfoRec clientinfo;

        clientinfo.client = client;
        clientinfo.prefix = (xConnSetupPrefix *) NULL;
        clientinfo.setup = (xConnSetup *) NULL;
        CallCallbacks((&ClientStateCallback), (pointer) &clientinfo);
    }
    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(pointer ospriv)
{
    int i;

    ClientPtr client;

    xReq data;

    i = nextFreeClientID;
    if (i == MAXCLIENTS)
        return (ClientPtr) NULL;
    clients[i] = client = malloc(totalClientSize);
    if (!client)
        return (ClientPtr) NULL;
    InitClient(client, i, ospriv);
    InitClientPrivates(client);
    if (!InitClientResources(client)) {
        free(client);
        return (ClientPtr) NULL;
    }
    data.reqType = 1;
    data.length = (sz_xReq + sz_xConnClientPrefix) >> 2;
    if (!InsertFakeRequest(client, (char *) &data, sz_xReq)) {
        FreeClientResources(client);
        free(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(register ClientPtr client)
{
    REQUEST(xReq);
    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);
    }
    ResetCurrentRequest(client);
    return (client->noClientException);
}

int
SendConnSetup(register ClientPtr client, const char *reason)
{
    xWindowRoot *root;

    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;
    ((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);

    for (i = 0; i < numScreens; i++) {
        unsigned int j;

        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(register ClientPtr client)
{
    const char *reason;
    char *auth_proto, *auth_string;

    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);
}

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

    rep.type = X_Error;
    rep.errorCode = errorCode;
    rep.majorCode = majorCode;
    rep.minorCode = minorCode;
    rep.resourceID = resId;

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

void
DeleteWindowFromAnySelections(WindowPtr pWin)
{
    int i;

    for (i = 0; i < NumCurrentSelections; i++)
        if (CurrentSelections[i].pWin == pWin) {
            if (SelectionCallback) {
                SelectionInfoRec info;

                info.selection = &CurrentSelections[i];
                info.kind = SelectionWindowDestroy;
                CallCallbacks(&SelectionCallback, &info);
            }
            CurrentSelections[i].pWin = (WindowPtr) NULL;
            CurrentSelections[i].window = None;
            CurrentSelections[i].client = NullClient;
        }
}

static void
DeleteClientFromAnySelections(ClientPtr client)
{
    int i;

    for (i = 0; i < NumCurrentSelections; i++)
        if (CurrentSelections[i].client == client) {
            if (SelectionCallback) {
                SelectionInfoRec info;

                info.selection = &CurrentSelections[i];
                info.kind = SelectionWindowDestroy;
                CallCallbacks(&SelectionCallback, &info);
            }
            CurrentSelections[i].pWin = (WindowPtr) NULL;
            CurrentSelections[i].window = None;
            CurrentSelections[i].client = NullClient;
        }
}

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