/* $Xorg: XKBSetMap.c,v 1.4 2000/08/17 19:45:03 cpqbld Exp $ */
/************************************************************
Copyright (c) 1993 by Silicon Graphics Computer Systems, Inc.

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 Silicon Graphics not be 
used in advertising or publicity pertaining to distribution 
of the software without specific prior written permission.
Silicon Graphics makes no representation about the suitability 
of this software for any purpose. It is provided "as is"
without any express or implied warranty.

SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS 
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 
AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
GRAPHICS 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.

********************************************************/
/* $XFree86: xc/lib/X11/XKBSetMap.c,v 3.2 2001/01/17 19:41:49 dawes Exp $ */

#include <stdio.h>
#define NEED_REPLIES
#define NEED_EVENTS
#include "Xlibint.h"
#include <X11/extensions/XKBproto.h>
#include "XKBlibint.h"

static int
#if NeedFunctionPrototypes
_XkbSizeKeyTypes(XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbSizeKeyTypes(xkb,req)
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
    XkbKeyTypePtr	map;
    int			i,len;

    if (((req->present&XkbKeyTypesMask)==0)||(req->nTypes==0)) {
	req->present&= ~XkbKeyTypesMask;
	req->firstType= req->nTypes= 0;
	return 0;
    }
    len= 0;
    map= &xkb->map->types[req->firstType];
    for (i=0;i<req->nTypes;i++,map++){
	len+= SIZEOF(xkbKeyTypeWireDesc);
	len+= map->map_count*SIZEOF(xkbKTSetMapEntryWireDesc);
	if (map->preserve)
	    len+= map->map_count*SIZEOF(xkbModsWireDesc);
    }
    return len;
}

static void
#if NeedFunctionPrototypes
_XkbWriteKeyTypes(Display *dpy,XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbWriteKeyTypes(dpy,xkb,req)
    Display	*	dpy;
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
    char *		buf;
    XkbKeyTypePtr 	type;
    int			i,n,sz;
    xkbKeyTypeWireDesc *desc;

    if ((req->present&XkbKeyTypesMask)==0)
	return;
    type= &xkb->map->types[req->firstType];
    for (i=0;i<req->nTypes;i++,type++) {
	sz= SIZEOF(xkbKeyTypeWireDesc);
	sz+= type->map_count*SIZEOF(xkbKTSetMapEntryWireDesc);
	if (type->preserve)
	    sz+= type->map_count*SIZEOF(xkbModsWireDesc);
	BufAlloc(xkbKeyTypeWireDesc *,desc,sz);
	desc->mask = type->mods.mask;
	desc->realMods = type->mods.real_mods;
	desc->virtualMods = type->mods.vmods;
	desc->numLevels = type->num_levels;
	desc->nMapEntries = type->map_count;
	desc->preserve = (type->preserve!=NULL);
	buf= (char *)&desc[1];
	if (desc->nMapEntries>0) {
	    xkbKTSetMapEntryWireDesc *wire;
	    wire= (xkbKTSetMapEntryWireDesc *)buf;
	    for (n=0;n<type->map_count;n++,wire++) {
		wire->level= type->map[n].level;
		wire->realMods= type->map[n].mods.real_mods;
		wire->virtualMods= type->map[n].mods.vmods;
	    }
	    buf= (char *)wire;
	    if (type->preserve) {
		xkbModsWireDesc *pwire;
		pwire= (xkbModsWireDesc *)buf;
		for (n=0;n<type->map_count;n++,pwire++) {
		    pwire->realMods= type->preserve[n].real_mods;
		    pwire->virtualMods= type->preserve[n].vmods;
		}
	    }
	}
    }
    return;
}

static int
#if NeedFunctionPrototypes
_XkbSizeKeySyms(XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbSizeKeySyms(xkb,req)
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
    int			i,len;
    unsigned		nSyms;

    if (((req->present&XkbKeySymsMask)==0)||(req->nKeySyms==0)) {
	req->present&= ~XkbKeySymsMask;
	req->firstKeySym= req->nKeySyms= 0;
	req->totalSyms= 0;
	return 0;
    }
    len= (int)(req->nKeySyms*sizeof(XkbSymMapRec));
    for (i=nSyms=0;i<req->nKeySyms;i++) {
	nSyms+= XkbKeyNumSyms(xkb,i+req->firstKeySym);
    }
    len+= nSyms*sizeof(CARD32);
    req->totalSyms= nSyms;
    return len;
}

static void
#if NeedFunctionPrototypes
_XkbWriteKeySyms(Display *dpy,XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbWriteKeySyms(dpy,xkb,req)
    Display *		dpy;
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
register KeySym *	pSym;
CARD32 *		outSym;
XkbSymMapPtr		symMap;
xkbSymMapWireDesc *desc;
register int	i;

    if ((req->present&XkbKeySymsMask)==0)
	return;
    symMap = &xkb->map->key_sym_map[req->firstKeySym];
    for (i=0;i<req->nKeySyms;i++,symMap++) {
	BufAlloc(xkbSymMapWireDesc *,desc,
		 SIZEOF(xkbSymMapWireDesc)+
		 (XkbKeyNumSyms(xkb,i+req->firstKeySym)*sizeof(CARD32)));
	desc->ktIndex[0] = symMap->kt_index[0];
	desc->ktIndex[1] = symMap->kt_index[1];
	desc->ktIndex[2] = symMap->kt_index[2];
	desc->ktIndex[3] = symMap->kt_index[3];
	desc->groupInfo = symMap->group_info;
	desc->width = symMap->width;
	desc->nSyms = XkbKeyNumSyms(xkb,i+req->firstKeySym);
	outSym = (CARD32 *)&desc[1];
	if (desc->nSyms>0) {
	     pSym = XkbKeySymsPtr(xkb,i+req->firstKeySym);
	    _XkbWriteCopyKeySyms(pSym,outSym,desc->nSyms);
	}
    }
    return;
}

static int
#if NeedFunctionPrototypes
_XkbSizeKeyActions(XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbSizeKeyActions(xkb,req)
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
    int			i,len,nActs;

    if (((req->present&XkbKeyActionsMask)==0)||(req->nKeyActs==0)) {
	req->present&= ~XkbKeyActionsMask;
	req->firstKeyAct= req->nKeyActs= 0;
	req->totalActs= 0;
	return 0;
    }
    for (nActs=i=0;i<req->nKeyActs;i++) {
	if (xkb->server->key_acts[i+req->firstKeyAct]!=0)
	    nActs+= XkbKeyNumActions(xkb,i+req->firstKeyAct);
    }
    len= XkbPaddedSize(req->nKeyActs)+(nActs*SIZEOF(xkbActionWireDesc));
    req->totalActs= nActs;
    return len;
}

static void
#if NeedFunctionPrototypes
_XkbWriteKeyActions(Display *dpy,XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbWriteKeyActions(dpy,xkb,req)
    Display *		dpy;
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
    register int	 i;
    int	 		 n;
    CARD8		*numDesc;
    XkbAction		*actDesc;

    if ((req->present&XkbKeyActionsMask)==0)
	return;
    n = XkbPaddedSize(req->nKeyActs);
    n+= (req->totalActs*SIZEOF(xkbActionWireDesc));

    BufAlloc(CARD8 *,numDesc,n);
    for (i=0;i<req->nKeyActs;i++) {
	if (xkb->server->key_acts[i+req->firstKeyAct]==0)
	     numDesc[i] = 0;
	else numDesc[i] = XkbKeyNumActions(xkb,(i+req->firstKeyAct));
    }
    actDesc = (XkbAction *)&numDesc[XkbPaddedSize(req->nKeyActs)];
    for (i=0;i<req->nKeyActs;i++) {
	if (xkb->server->key_acts[i+req->firstKeyAct]!=0) {
	    n = XkbKeyNumActions(xkb,(i+req->firstKeyAct));
	    memcpy(actDesc,XkbKeyActionsPtr(xkb,(i+req->firstKeyAct)),
                                                   n*SIZEOF(xkbActionWireDesc));
	    actDesc+= n;
	}
    }
    return;
}

static int
#if NeedFunctionPrototypes
_XkbSizeKeyBehaviors(XkbDescPtr	xkb,xkbSetMapReq *req)
#else
_XkbSizeKeyBehaviors(xkb,req)
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
register int i,first,last,nFound;

    if (((req->present&XkbKeyBehaviorsMask)==0)||(req->nKeyBehaviors<1)) {
	req->present&= ~XkbKeyBehaviorsMask;
	req->firstKeyBehavior= req->nKeyBehaviors= 0;
	req->totalKeyBehaviors= 0;
	return 0;
    }
    first= req->firstKeyBehavior;
    last= first+req->nKeyBehaviors-1;
    for (i=first,nFound=0;i<=last;i++) {
	if (xkb->server->behaviors[i].type!=XkbKB_Default)
	    nFound++;
    }
    req->totalKeyBehaviors= nFound;
    return (nFound*SIZEOF(xkbBehaviorWireDesc));
}

static void
#if NeedFunctionPrototypes
_XkbWriteKeyBehaviors(Display *dpy,XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbWriteKeyBehaviors(dpy,xkb,req)
    Display *		dpy;
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
register int 		i,first,last;
xkbBehaviorWireDesc *	wire;
char *			buf;

    if ((req->present&XkbKeyBehaviorsMask)==0)
	return;
    first= req->firstKeyBehavior;
    last= first+req->nKeyBehaviors-1;

    i= req->totalKeyBehaviors*SIZEOF(xkbBehaviorWireDesc);
    BufAlloc(char *,buf,i);
    wire= (xkbBehaviorWireDesc *)buf;
    for (i=first;i<=last;i++) {
	if (xkb->server->behaviors[i].type!=XkbKB_Default) {
	    wire->key= i;
	    wire->type= xkb->server->behaviors[i].type;
	    wire->data= xkb->server->behaviors[i].data;
	    buf+= SIZEOF(xkbBehaviorWireDesc);
	    wire= (xkbBehaviorWireDesc *)buf;
	}
    }
    return;
}

static unsigned
#if NeedFunctionPrototypes
_XkbSizeVirtualMods(xkbSetMapReq *req)
#else
_XkbSizeVirtualMods(req)
    xkbSetMapReq *	req;
#endif
{
register int i,bit,nMods;

   if (((req->present&XkbVirtualModsMask)==0)||(req->virtualMods==0)) {
	req->present&= ~XkbVirtualModsMask;
	req->virtualMods= 0;
	return 0;
   }
   for (i=nMods=0,bit=1;i<XkbNumVirtualMods;i++,bit<<=1) {
	if (req->virtualMods&bit)
	    nMods++;
   }
   return XkbPaddedSize(nMods);
}

static void
#if NeedFunctionPrototypes
_XkbWriteVirtualMods(	Display *	dpy,
			XkbDescPtr 	xkb,
			xkbSetMapReq *	req,
			unsigned 	size)
#else
_XkbWriteVirtualMods(dpy,xkb,req,size)
    Display *		dpy;
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
    unsigned 		size;
#endif
{
    register int	 i,bit;
    CARD8		*vmods;

    /* This was req->present&XkbVirtualModsMask==0, and '==' beats '&' */
    if (((req->present & XkbVirtualModsMask) == 0) || (size < 1))
	return;
    BufAlloc(CARD8 *,vmods,size);
    for (i=0,bit=1;i<XkbNumVirtualMods;i++,bit<<=1) {
	if (req->virtualMods&bit)
	    *vmods++= xkb->server->vmods[i];
    }
    return;
}

static int
#if NeedFunctionPrototypes
_XkbSizeKeyExplicit(XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbSizeKeyExplicit(xkb,req)
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
register int i,first,last,nFound;

    if (((req->present&XkbExplicitComponentsMask)==0)||(req->nKeyExplicit==0)) {
	req->present&= ~XkbExplicitComponentsMask;
	req->firstKeyExplicit= req->nKeyExplicit= 0;
	req->totalKeyExplicit= 0;
	return 0;
    }
    first= req->firstKeyExplicit;
    last= first+req->nKeyExplicit-1;

    for (i=first,nFound=0;i<=last;i++) {
	if (xkb->server->explicit[i]!=0)
	    nFound++;
    }
    req->totalKeyExplicit= nFound;
    return XkbPaddedSize((nFound*2));
}

static void
#if NeedFunctionPrototypes
_XkbWriteKeyExplicit(Display *dpy,XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbWriteKeyExplicit(dpy,xkb,req)
    Display *		dpy;
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
register int	i,first,last;
CARD8 *		wire;

    if ((req->present&XkbExplicitComponentsMask)==0)
	return;
    first= req->firstKeyExplicit;
    last= first+req->nKeyExplicit;
    i= XkbPaddedSize((req->totalKeyExplicit*2));
    BufAlloc(CARD8 *,wire,i);
    for (i=first;i<=last;i++) {
	if (xkb->server->explicit[i]!=0) {
	    wire[0]= i;
	    wire[1]= xkb->server->explicit[i];
	    wire+= 2;
	}
    }
    return;
}

static int
#if NeedFunctionPrototypes
_XkbSizeModifierMap(XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbSizeModifierMap(xkb,req)
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
register int i,first,last,nFound;

    if (((req->present&XkbModifierMapMask)==0)||(req->nModMapKeys==0)) {
	req->present&= ~XkbModifierMapMask;
	req->firstModMapKey= req->nModMapKeys= 0;
	req->totalModMapKeys= 0;
	return 0;
    }
    first= req->firstModMapKey;
    last= first+req->nModMapKeys-1;

    for (i=first,nFound=0;i<=last;i++) {
	if (xkb->map->modmap[i]!=0)
	    nFound++;
    }
    req->totalModMapKeys= nFound;
    return XkbPaddedSize((nFound*2));
}

static void
#if NeedFunctionPrototypes
_XkbWriteModifierMap(Display *dpy,XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbWriteModifierMap(dpy,xkb,req)
    Display *		dpy;
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
register int	i,first,last;
CARD8 *		wire;

    if ((req->present&XkbModifierMapMask)==0)
	return;
    first= req->firstModMapKey;
    last= first+req->nModMapKeys-1;
    if (req->totalModMapKeys>0) {
	i= XkbPaddedSize((req->totalModMapKeys*2));
	BufAlloc(CARD8 *,wire,i);
	for (i=first;i<=last;i++) {
	    if (xkb->map->modmap[i]!=0) {
		wire[0]= i;
		wire[1]= xkb->map->modmap[i];
		wire+= 2;
	    }
	}
    }
    return;
}

static int
#if NeedFunctionPrototypes
_XkbSizeVirtualModMap(XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbSizeVirtualModMap(xkb,req)
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
register int i,first,last,nFound;

    if (((req->present&XkbVirtualModMapMask)==0)||(req->nVModMapKeys==0)) {
	req->present&= ~XkbVirtualModMapMask;
	req->firstVModMapKey= req->nVModMapKeys= 0;
	req->totalVModMapKeys= 0;
	return 0;
    }
    first= req->firstVModMapKey;
    last= first+req->nVModMapKeys-1;

    for (i=first,nFound=0;i<=last;i++) {
	if (xkb->server->vmodmap[i]!=0)
	    nFound++;
    }
    req->totalVModMapKeys= nFound;
    return nFound*SIZEOF(xkbVModMapWireDesc);
}

static void
#if NeedFunctionPrototypes
_XkbWriteVirtualModMap(Display *dpy,XkbDescPtr xkb,xkbSetMapReq *req)
#else
_XkbWriteVirtualModMap(dpy,xkb,req)
    Display *		dpy;
    XkbDescPtr		xkb;
    xkbSetMapReq *	req;
#endif
{
register int		i,first,last;
xkbVModMapWireDesc *	wire;

    if ((req->present&XkbVirtualModMapMask)==0)
	return;
    first= req->firstVModMapKey;
    last= first+req->nVModMapKeys-1;
    if (req->totalVModMapKeys>0) {
	i= req->totalVModMapKeys*SIZEOF(xkbVModMapWireDesc);
	BufAlloc(xkbVModMapWireDesc *,wire,i);
	for (i=first;i<=last;i++) {
	    if (xkb->server->vmodmap[i]!=0) {
		wire->key= i;
		wire->vmods= xkb->server->vmodmap[i];
		wire++;
	    }
	}
    }
    return;
}

static void
#if NeedFunctionPrototypes
SendSetMap(Display *dpy,XkbDescPtr xkb,xkbSetMapReq *req)
#else
SendSetMap(dpy,xkb,req)
    Display *		dpy;
    XkbDescPtr 		xkb;
    xkbSetMapReq *	req;
#endif
{
xkbSetMapReq tmp;
unsigned szMods;

    req->length+= _XkbSizeKeyTypes(xkb,req)/4;
    req->length+= _XkbSizeKeySyms(xkb,req)/4;
    req->length+= _XkbSizeKeyActions(xkb,req)/4;
    req->length+= _XkbSizeKeyBehaviors(xkb,req)/4;
    szMods= _XkbSizeVirtualMods(req);
    req->length+= szMods/4;
    req->length+= _XkbSizeKeyExplicit(xkb,req)/4;
    req->length+= _XkbSizeModifierMap(xkb,req)/4;
    req->length+= _XkbSizeVirtualModMap(xkb,req)/4;

    tmp= *req;
    if ( tmp.nTypes>0 )
	_XkbWriteKeyTypes(dpy,xkb,&tmp);
    if ( tmp.nKeySyms>0 )
	_XkbWriteKeySyms(dpy,xkb,&tmp);
    if ( tmp.nKeyActs )
	_XkbWriteKeyActions(dpy,xkb,&tmp);
    if ( tmp.totalKeyBehaviors>0 )
	_XkbWriteKeyBehaviors(dpy,xkb,&tmp);
    if ( tmp.virtualMods )
	_XkbWriteVirtualMods(dpy,xkb,&tmp,szMods);
    if ( tmp.totalKeyExplicit>0)
	_XkbWriteKeyExplicit(dpy,xkb,&tmp);
    if ( tmp.totalModMapKeys>0)
	_XkbWriteModifierMap(dpy,xkb,&tmp);
    if ( tmp.totalVModMapKeys>0)
	_XkbWriteVirtualModMap(dpy,xkb,&tmp);
    return;
}

Bool
#if NeedFunctionPrototypes
XkbSetMap(Display *dpy,unsigned which,XkbDescPtr xkb)
#else
XkbSetMap(dpy,which,xkb)
    Display *	dpy;
    unsigned 	which;
    XkbDescPtr	xkb;
#endif
{
register xkbSetMapReq *	req;
XkbInfoPtr 		xkbi;
XkbServerMapPtr		srv;
XkbClientMapPtr		map;

    if ((dpy->flags & XlibDisplayNoXkb) ||
	(!dpy->xkb_info && !XkbUseExtension(dpy,NULL,NULL))||
	(!xkb))
	return False;
    map= xkb->map;
    srv= xkb->server;

    if (((which&XkbKeyTypesMask)&&((!map)||(!map->types)))||
	((which&XkbKeySymsMask)&&((!map)||(!map->syms)||(!map->key_sym_map)))||
	((which&XkbKeyActionsMask)&&((!srv)||(!srv->key_acts)))||
	((which&XkbKeyBehaviorsMask)&&((!srv)||(!srv->behaviors)))||
	((which&XkbVirtualModsMask)&&(!srv))||
	((which&XkbExplicitComponentsMask)&&((!srv)||(!srv->explicit)))||
	((which&XkbModifierMapMask)&&((!map)||(!map->modmap)))||
	((which&XkbVirtualModMapMask)&&((!srv)||(!srv->vmodmap))))
	return False;

    LockDisplay(dpy);
    xkbi = dpy->xkb_info;
    GetReq(kbSetMap, req);
    req->reqType = xkbi->codes->major_opcode;
    req->xkbReqType = X_kbSetMap;
    req->deviceSpec = xkb->device_spec;
    req->present = which;
    req->flags = XkbSetMapAllFlags;
    req->minKeyCode= xkb->min_key_code;
    req->maxKeyCode= xkb->max_key_code;
    req->firstType = 0;
    if (which&XkbKeyTypesMask)	req->nTypes = map->num_types;
    else			req->nTypes = 0;
    if (which&XkbKeySymsMask) {
	req->firstKeySym = xkb->min_key_code;
	req->nKeySyms = XkbNumKeys(xkb);
    }
    if (which&XkbKeyActionsMask) {
	req->firstKeyAct = xkb->min_key_code;
	req->nKeyActs = XkbNumKeys(xkb);
    }
    if (which&XkbKeyBehaviorsMask) {
	req->firstKeyBehavior = xkb->min_key_code;
	req->nKeyBehaviors = XkbNumKeys(xkb);
    }
    if (which&XkbVirtualModsMask)
	req->virtualMods= ~0;
    if (which&XkbExplicitComponentsMask) {
	req->firstKeyExplicit= xkb->min_key_code;
	req->nKeyExplicit = XkbNumKeys(xkb);
    }
    if (which&XkbModifierMapMask) {
	req->firstModMapKey= xkb->min_key_code;
	req->nModMapKeys = XkbNumKeys(xkb);
    }
    if (which&XkbVirtualModMapMask) {
	req->firstVModMapKey= xkb->min_key_code;
	req->nVModMapKeys = XkbNumKeys(xkb);
    }
    SendSetMap(dpy,xkb,req);
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}

Bool
#if NeedFunctionPrototypes
XkbChangeMap(Display *dpy,XkbDescPtr xkb,XkbMapChangesPtr changes)
#else
XkbChangeMap(dpy,xkb,changes)
    Display *		dpy;
    XkbDescPtr		xkb;
    XkbMapChangesPtr	changes;
#endif
{
register xkbSetMapReq *	req;
XkbInfoPtr 		xkbi;
XkbServerMapPtr		srv;
XkbClientMapPtr		map;

    if ((dpy->flags & XlibDisplayNoXkb) ||
	(!dpy->xkb_info && !XkbUseExtension(dpy,NULL,NULL))||
	(!xkb)||(!changes))
	return False;
    srv= xkb->server;
    map= xkb->map;

    if (((changes->changed&XkbKeyTypesMask)&&((!map)||(!map->types)))||
	((changes->changed&XkbKeySymsMask)&&((!map)||(!map->syms)||
				(!map->key_sym_map)))||
	((changes->changed&XkbKeyActionsMask)&&((!srv)||(!srv->key_acts)))||
	((changes->changed&XkbKeyBehaviorsMask)&&((!srv)||(!srv->behaviors)))||
	((changes->changed&XkbVirtualModsMask)&&(!srv))||
	((changes->changed&XkbExplicitComponentsMask)&&
				((!srv)||(!srv->explicit)))||
	((changes->changed&XkbModifierMapMask)&&((!map)||(!map->modmap)))||
	((changes->changed&XkbVirtualModMapMask)&&((!srv)||(!srv->vmodmap))))
	return False;

    LockDisplay(dpy);
    xkbi = dpy->xkb_info;
    GetReq(kbSetMap, req);
    req->reqType = xkbi->codes->major_opcode;
    req->xkbReqType = X_kbSetMap;
    req->deviceSpec = xkb->device_spec;
    req->present = changes->changed;
    req->flags = XkbSetMapRecomputeActions;
    req->minKeyCode= xkb->min_key_code;
    req->maxKeyCode= xkb->max_key_code;
    req->firstType = changes->first_type;
    req->nTypes = changes->num_types;
    req->firstKeySym = changes->first_key_sym;
    req->nKeySyms = changes->num_key_syms;
    req->firstKeyAct = changes->first_key_act;
    req->nKeyActs = changes->num_key_acts;
    req->firstKeyBehavior = changes->first_key_behavior;
    req->nKeyBehaviors = changes->num_key_behaviors;
    req->virtualMods = changes->vmods;
    req->firstKeyExplicit = changes->first_key_explicit;
    req->nKeyExplicit = changes->num_key_explicit;
    req->firstModMapKey = changes->first_modmap_key;
    req->nModMapKeys = changes->num_modmap_keys;
    req->firstVModMapKey = changes->first_vmodmap_key;
    req->nVModMapKeys = changes->num_vmodmap_keys;
    SendSetMap(dpy,xkb,req);
    UnlockDisplay(dpy);
    SyncHandle();
    return True;
}