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kc3-lang/libxkbcommon/src/malloc.c

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  • Author : Dan Nicholson
    Date : 2009-03-29 08:11:25
    Hash : e86b31ce
    Message : Add XKBlib resizing functions These were originally in XKBMalloc.c.

  • src/malloc.c
  • /************************************************************
    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.
    
    ********************************************************/
    
    #include "X11/extensions/XKBcommon.h"
    #include "XKBcommonint.h"
    
    int
    XkbcAllocClientMap(XkbcDescPtr xkb, unsigned which, unsigned nTotalTypes)
    {
        int i;
        XkbClientMapPtr map;
    
        if (!xkb || ((nTotalTypes > 0) && (nTotalTypes < XkbNumRequiredTypes)))
            return BadValue;
    
        if ((which & XkbKeySymsMask) &&
            ((!XkbIsLegalKeycode(xkb->min_key_code)) ||
             (!XkbIsLegalKeycode(xkb->max_key_code)) ||
             (xkb->max_key_code < xkb->min_key_code))) {
    #ifdef DEBUG
            fprintf(stderr, "bad keycode (%d,%d) in XkbAllocClientMap\n",
                    xkb->min_key_code, xkb->max_key_code);
    #endif
            return BadValue;
        }
    
        if (!xkb->map) {
            map = _XkbTypedCalloc(1, XkbClientMapRec);
            if (!map)
                return BadAlloc;
            xkb->map = map;
        }
        else
            map = xkb->map;
    
        if ((which & XkbKeyTypesMask) && (nTotalTypes > 0)) {
            if (!map->types) {
                map->types = _XkbTypedCalloc(nTotalTypes, XkbKeyTypeRec);
                if (!map->types)
                    return BadAlloc;
    
                map->num_types = 0;
                map->size_types = nTotalTypes;
            }
            else if (map->size_types < nTotalTypes) {
                XkbKeyTypeRec *prev_types = map->types;
    
                map->types = _XkbTypedRealloc(map->types, nTotalTypes,
                                              XkbKeyTypeRec);
                if (!map->types) {
                    _XkbFree(prev_types);
                    map->num_types = map->size_types = 0;
                    return BadAlloc;
                }
    
                map->size_types = nTotalTypes;
                bzero(&map->types[map->num_types],
                      (map->size_types - map->num_types) * sizeof(XkbKeyTypeRec));
            }
        }
    
        if (which & XkbKeySymsMask) {
            int nKeys = XkbNumKeys(xkb);
    
            if (!map->syms) {
                map->size_syms = (nKeys * 15) / 10;
                map->syms = _XkbTypedCalloc(map->size_syms, KeySym);
                if (!map->syms) {
                    map->size_syms = 0;
                    return BadAlloc;
                }
                map->num_syms = 1;
                map->syms[0] = NoSymbol;
            }
    
            if (!map->key_sym_map) {
                i = xkb->max_key_code + 1;
                map->key_sym_map = _XkbTypedCalloc(i, XkbSymMapRec);
                if (!map->key_sym_map)
                    return BadAlloc;
            }
        }
    
        if (which & XkbModifierMapMask) {
            if ((!XkbIsLegalKeycode(xkb->min_key_code)) ||
                (!XkbIsLegalKeycode(xkb->max_key_code)) ||
                (xkb->max_key_code < xkb->min_key_code))
                return BadMatch;
    
            if (!map->modmap) {
                i = xkb->max_key_code + 1;
                map->modmap = _XkbTypedCalloc(i, unsigned char);
                if (!map->modmap)
                    return BadAlloc;
            }
        }
    
        return Success;
    }
    
    int
    XkbcAllocServerMap(XkbcDescPtr xkb, unsigned which, unsigned nNewActions)
    {
        int i;
        XkbServerMapPtr map;
    
        if (!xkb)
            return BadMatch;
    
        if (!xkb->server) {
            map = _XkbTypedCalloc(1, XkbServerMapRec);
            if (!map)
                return BadAlloc;
    
            for (i = 0; i < XkbNumVirtualMods; i++)
                map->vmods[i] = XkbNoModifierMask;
    
            xkb->server = map;
        }
        else
            map = xkb->server;
    
        if (which & XkbExplicitComponentsMask) {
            if ((!XkbIsLegalKeycode(xkb->min_key_code)) ||
                (!XkbIsLegalKeycode(xkb->max_key_code)) ||
                (xkb->max_key_code < xkb->min_key_code))
                return BadMatch;
    
            if (!map->explicit) {
                i = xkb->max_key_code + 1;
                map->explicit = _XkbTypedCalloc(i, unsigned char);
                if (!map->explicit)
                    return BadAlloc;
            }
        }
    
        if (which&XkbKeyActionsMask) {
            if ((!XkbIsLegalKeycode(xkb->min_key_code)) ||
                (!XkbIsLegalKeycode(xkb->max_key_code)) ||
                (xkb->max_key_code < xkb->min_key_code))
                return BadMatch;
    
            if (nNewActions < 1)
                nNewActions = 1;
    
            if (!map->acts) {
                map->acts = _XkbTypedCalloc(nNewActions + 1, XkbAction);
                if (!map->acts)
                    return BadAlloc;
                map->num_acts = 1;
                map->size_acts = nNewActions + 1;
            }
            else if ((map->size_acts - map->num_acts) < nNewActions) {
                unsigned need;
                XkbAction *prev_acts = map->acts;
    
                need = map->num_acts + nNewActions;
                map->acts = _XkbTypedRealloc(map->acts, need, XkbAction);
                if (!map->acts) {
                    _XkbFree(prev_acts);
                    map->num_acts = map->size_acts = 0;
                    return BadAlloc;
                }
    
                map->size_acts = need;
                bzero(&map->acts[map->num_acts],
                      (map->size_acts - map->num_acts) * sizeof(XkbAction));
            }
    
            if (!map->key_acts) {
                i = xkb->max_key_code + 1;
                map->key_acts = _XkbTypedCalloc(i, unsigned short);
                if (!map->key_acts)
                    return BadAlloc;
            }
        }
    
        if (which & XkbKeyBehaviorsMask) {
            if ((!XkbIsLegalKeycode(xkb->min_key_code)) ||
                (!XkbIsLegalKeycode(xkb->max_key_code)) ||
                (xkb->max_key_code < xkb->min_key_code))
                return BadMatch;
    
            if (!map->behaviors) {
                i = xkb->max_key_code + 1;
                map->behaviors = _XkbTypedCalloc(i, XkbBehavior);
                if (!map->behaviors)
                    return BadAlloc;
            }
        }
    
        if (which & XkbVirtualModMapMask) {
            if ((!XkbIsLegalKeycode(xkb->min_key_code)) ||
                (!XkbIsLegalKeycode(xkb->max_key_code)) ||
                (xkb->max_key_code < xkb->min_key_code))
                return BadMatch;
    
            if (!map->vmodmap) {
                i = xkb->max_key_code + 1;
                map->vmodmap = _XkbTypedCalloc(i, unsigned short);
                if (!map->vmodmap)
                    return BadAlloc;
            }
        }
    
        return Success;
    }
    
    int
    XkbcCopyKeyType(XkbKeyTypePtr from, XkbKeyTypePtr into)
    {
        if (!from || !into)
            return BadMatch;
    
        if (into->map) {
            _XkbFree(into->map);
            into->map = NULL;
        }
        if (into->preserve) {
           _XkbFree(into->preserve);
           into->preserve= NULL;
        }
        if (into->level_names) {
            _XkbFree(into->level_names);
            into->level_names = NULL;
        }
    
        *into = *from;
    
        if (from->map && (into->map_count > 0)) {
            into->map = _XkbTypedCalloc(into->map_count, XkbKTMapEntryRec);
            if (!into->map)
                return BadAlloc;
            memcpy(into->map, from->map,
                   into->map_count * sizeof(XkbKTMapEntryRec));
        }
    
        if (from->preserve && (into->map_count > 0)) {
            into->preserve = _XkbTypedCalloc(into->map_count, XkbModsRec);
            if (!into->preserve)
                return BadAlloc;
            memcpy(into->preserve, from->preserve,
                   into->map_count * sizeof(XkbModsRec));
        }
    
        if (from->level_names && (into->num_levels > 0)) {
            into->level_names = _XkbTypedCalloc(into->num_levels, Atom);
            if (!into->level_names)
                return BadAlloc;
            memcpy(into->level_names, from->level_names,
                   into->num_levels * sizeof(Atom));
        }
    
        return Success;
    }
    
    int
    XkbcCopyKeyTypes(XkbKeyTypePtr from, XkbKeyTypePtr into, int num_types)
    {
        int i, rtrn;
    
        if (!from || !into || (num_types < 0))
            return BadMatch;
    
        for (i = 0; i < num_types; i++) {
            if ((rtrn = XkbcCopyKeyType(from++, into++)) != Success)
                return rtrn;
        }
    
        return Success;
    }
    
    int
    XkbcResizeKeyType(	XkbcDescPtr	xkb,
    			int		type_ndx,
    			int		map_count,
    			Bool		want_preserve,
    			int		new_num_lvls)
    {
    XkbKeyTypePtr	type;
    KeyCode		matchingKeys[XkbMaxKeyCount],nMatchingKeys;
    
        if ((type_ndx<0)||(type_ndx>=xkb->map->num_types)||(map_count<0)||
        							(new_num_lvls<1))
    	return BadValue;
        switch (type_ndx) {
    	case XkbOneLevelIndex:
    	    if (new_num_lvls!=1)
    		return BadMatch;
    	    break;
    	case XkbTwoLevelIndex:
    	case XkbAlphabeticIndex:
    	case XkbKeypadIndex:
    	    if (new_num_lvls!=2)
    		return BadMatch;
    	    break;
        }
        type= &xkb->map->types[type_ndx];
        if (map_count==0) {
    	if (type->map!=NULL)
    	    _XkbFree(type->map);
    	type->map= NULL;
    	if (type->preserve!=NULL)
    	    _XkbFree(type->preserve);
    	type->preserve= NULL;
    	type->map_count= 0;
        }
        else {
    	XkbKTMapEntryRec *prev_map = type->map;
    
    	if ((map_count>type->map_count)||(type->map==NULL))
    	    type->map=_XkbTypedRealloc(type->map,map_count,XkbKTMapEntryRec);
    	if (!type->map) {
    	    if (prev_map)
    		_XkbFree(prev_map);
    	    return BadAlloc;
    	}
    	if (want_preserve) {
    	    XkbModsRec *prev_preserve = type->preserve;
    
    	    if ((map_count>type->map_count)||(type->preserve==NULL)) {
    		type->preserve= _XkbTypedRealloc(type->preserve,map_count,
    	     						    XkbModsRec);
    	    }
    	    if (!type->preserve) {
    		if (prev_preserve)
    		    _XkbFree(prev_preserve);
    		return BadAlloc;
    	    }
    	}
    	else if (type->preserve!=NULL) {
    	    _XkbFree(type->preserve);
    	    type->preserve= NULL;
    	}
    	type->map_count= map_count;
        }
    
        if ((new_num_lvls>type->num_levels)||(type->level_names==NULL)) {
    	Atom * prev_level_names = type->level_names;
    
    	type->level_names=_XkbTypedRealloc(type->level_names,new_num_lvls,Atom);
    	if (!type->level_names) {
    	    if (prev_level_names)
    		_XkbFree(prev_level_names);
    	    return BadAlloc;
    	}
        }
        /*
         * Here's the theory:
         *    If the width of the type changed, we might have to resize the symbol
         * maps for any keys that use the type for one or more groups.  This is
         * expensive, so we'll try to cull out any keys that are obviously okay:
         * In any case:
         *    - keys that have a group width <= the old width are okay (because
         *      they could not possibly have been associated with the old type)
         * If the key type increased in size:
         *    - keys that already have a group width >= to the new width are okay
         *    + keys that have a group width >= the old width but < the new width
         *      might have to be enlarged.
         * If the key type decreased in size:
         *    - keys that have a group width > the old width don't have to be
         *      resized (because they must have some other wider type associated
         *      with some group).
         *    + keys that have a group width == the old width might have to be
         *      shrunk.
         * The possibilities marked with '+' require us to examine the key types
         * associated with each group for the key.
         */
        bzero(matchingKeys,XkbMaxKeyCount*sizeof(KeyCode));
        nMatchingKeys= 0;
        if (new_num_lvls>type->num_levels) {
    	int	 		nTotal;
    	KeySym	*		newSyms;
    	int			width,match,nResize;
    	register int		i,g,nSyms;
    
    	nResize= 0;
    	for (nTotal=1,i=xkb->min_key_code;i<=xkb->max_key_code;i++) {
    	    width= XkbKeyGroupsWidth(xkb,i);
    	    if (width<type->num_levels)
    		continue;
    	    for (match=0,g=XkbKeyNumGroups(xkb,i)-1;(g>=0)&&(!match);g--) {
    		if (XkbKeyKeyTypeIndex(xkb,i,g)==type_ndx) {
    		    matchingKeys[nMatchingKeys++]= i;
    		    match= 1;
    		}
    	    }
    	    if ((!match)||(width>=new_num_lvls))
    		nTotal+= XkbKeyNumSyms(xkb,i);
    	    else {
    		nTotal+= XkbKeyNumGroups(xkb,i)*new_num_lvls;
    		nResize++;
    	    }
    	}
    	if (nResize>0) {
    	    int nextMatch;
    	    xkb->map->size_syms= (nTotal*12)/10;
    	    newSyms = _XkbTypedCalloc(xkb->map->size_syms,KeySym);
    	    if (newSyms==NULL)
    		return BadAlloc;
    	    nextMatch= 0;
    	    nSyms= 1;
    	    for (i=xkb->min_key_code;i<=xkb->max_key_code;i++) {
    		if (matchingKeys[nextMatch]==i) {
    		    KeySym *pOld;
    		    nextMatch++;
    		    width= XkbKeyGroupsWidth(xkb,i);
    		    pOld= XkbKeySymsPtr(xkb,i);
    		    for (g=XkbKeyNumGroups(xkb,i)-1;g>=0;g--) {
    			memcpy(&newSyms[nSyms+(new_num_lvls*g)],&pOld[width*g],
    							width*sizeof(KeySym));
    		    }
    		    xkb->map->key_sym_map[i].offset= nSyms;
    		    nSyms+= XkbKeyNumGroups(xkb,i)*new_num_lvls;
    		}
    		else {
    		    memcpy(&newSyms[nSyms],XkbKeySymsPtr(xkb,i),
    					XkbKeyNumSyms(xkb,i)*sizeof(KeySym));
    		    xkb->map->key_sym_map[i].offset= nSyms;
    		    nSyms+= XkbKeyNumSyms(xkb,i);
    		}
    	    }
    	    type->num_levels= new_num_lvls;
    	    _XkbFree(xkb->map->syms);
    	    xkb->map->syms= newSyms;
    	    xkb->map->num_syms= nSyms;
    	    return Success;
    	}
        }
        else if (new_num_lvls<type->num_levels) {
    	int 		width,match;
    	register int	g,i;
    	for (i=xkb->min_key_code;i<=xkb->max_key_code;i++) {
    	    width= XkbKeyGroupsWidth(xkb,i);
    	    if (width<type->num_levels)
    		continue;
    	    for (match=0,g=XkbKeyNumGroups(xkb,i)-1;(g>=0)&&(!match);g--) {
    		if (XkbKeyKeyTypeIndex(xkb,i,g)==type_ndx) {
    		    matchingKeys[nMatchingKeys++]= i;
    		    match= 1;
    		}
    	    }
    	}
        }
        if (nMatchingKeys>0) {
    	int 		key,firstClear;
    	register int	i,g;
    	if (new_num_lvls>type->num_levels)
    	     firstClear= type->num_levels;
    	else firstClear= new_num_lvls;
    	for (i=0;i<nMatchingKeys;i++) {
    	    KeySym *	pSyms;
    	    int		width,nClear;
    
    	    key= matchingKeys[i];
    	    width= XkbKeyGroupsWidth(xkb,key);
    	    nClear= width-firstClear;
    	    pSyms= XkbKeySymsPtr(xkb,key);
    	    for (g=XkbKeyNumGroups(xkb,key)-1;g>=0;g--) {
    		if (XkbKeyKeyTypeIndex(xkb,key,g)==type_ndx) {
    		    if (nClear>0)
    			bzero(&pSyms[g*width+firstClear],nClear*sizeof(KeySym));
    		}
    	    }
    	}
        }
        type->num_levels= new_num_lvls;
        return Success;
    }
    
    KeySym *
    XkbcResizeKeySyms(XkbcDescPtr xkb,int key,int needed)
    {
    register int i,nSyms,nKeySyms;
    unsigned nOldSyms;
    KeySym	*newSyms;
    
        if (needed==0) {
    	xkb->map->key_sym_map[key].offset= 0;
    	return xkb->map->syms;
        }
        nOldSyms= XkbKeyNumSyms(xkb,key);
        if (nOldSyms>=(unsigned)needed) {
    	return XkbKeySymsPtr(xkb,key);
        }
        if (xkb->map->size_syms-xkb->map->num_syms>=(unsigned)needed) {
    	if (nOldSyms>0) {
    	    memcpy(&xkb->map->syms[xkb->map->num_syms],XkbKeySymsPtr(xkb,key),
    						nOldSyms*sizeof(KeySym));
    	}
    	if ((needed-nOldSyms)>0) {
    	    bzero(&xkb->map->syms[xkb->map->num_syms+XkbKeyNumSyms(xkb,key)],
    					(needed-nOldSyms)*sizeof(KeySym));
    	}
    	xkb->map->key_sym_map[key].offset = xkb->map->num_syms;
    	xkb->map->num_syms+= needed;
    	return &xkb->map->syms[xkb->map->key_sym_map[key].offset];
        }
        xkb->map->size_syms+= (needed>32?needed:32);
        newSyms = _XkbTypedCalloc(xkb->map->size_syms,KeySym);
        if (newSyms==NULL)
    	return NULL;
        newSyms[0]= NoSymbol;
        nSyms = 1;
        for (i=xkb->min_key_code;i<=(int)xkb->max_key_code;i++) {
    	int nCopy;
    
    	nCopy= nKeySyms= XkbKeyNumSyms(xkb,i);
    	if ((nKeySyms==0)&&(i!=key))
    	    continue;
    	if (i==key)
    	    nKeySyms= needed;
    	if (nCopy!=0)
    	   memcpy(&newSyms[nSyms],XkbKeySymsPtr(xkb,i),nCopy*sizeof(KeySym));
    	if (nKeySyms>nCopy)
    	    bzero(&newSyms[nSyms+nCopy],(nKeySyms-nCopy)*sizeof(KeySym));
    	xkb->map->key_sym_map[i].offset = nSyms;
    	nSyms+= nKeySyms;
        }
        _XkbFree(xkb->map->syms);
        xkb->map->syms = newSyms;
        xkb->map->num_syms = nSyms;
        return &xkb->map->syms[xkb->map->key_sym_map[key].offset];
    }
    
    static unsigned
    _ExtendRange(	unsigned int 	old_flags,
    		unsigned int	flag,
    		KeyCode		newKC,
    		KeyCode *	old_min,
    		unsigned char *	old_num)
    {
        if ((old_flags&flag)==0) {
    	old_flags|= flag;
    	*old_min= newKC;
    	*old_num= 1;
        }
        else {
    	int	last= (*old_min)+(*old_num)-1;
    	if (newKC<*old_min) {
    	    *old_min= newKC;
    	    *old_num= (last-newKC)+1;
    	}
    	else if (newKC>last) {
    	    *old_num= (newKC-(*old_min))+1;
    	}
        }
        return old_flags;
    }
    
    int
    XkbcChangeKeycodeRange(	XkbcDescPtr	xkb,
    			int 		minKC,
    			int 		maxKC,
    			XkbChangesPtr	changes)
    {
    int	tmp;
    
        if ((!xkb)||(minKC<XkbMinLegalKeyCode)||(maxKC>XkbMaxLegalKeyCode))
    	return BadValue;
        if (minKC>maxKC)
    	return BadMatch;
        if (minKC<xkb->min_key_code) {
    	if (changes)
    	    changes->map.min_key_code= minKC;
    	tmp= xkb->min_key_code-minKC;
    	if (xkb->map)  {
    	    if (xkb->map->key_sym_map) {
    		bzero((char *)&xkb->map->key_sym_map[minKC],
    					tmp*sizeof(XkbSymMapRec));
    		if (changes) {
    		    changes->map.changed= _ExtendRange(changes->map.changed,
    		    				XkbKeySymsMask,minKC,
    	    					&changes->map.first_key_sym,
    	    					&changes->map.num_key_syms);
    		}
    	    }
    	    if (xkb->map->modmap) {
    		bzero((char *)&xkb->map->modmap[minKC],tmp);
    		if (changes) {
    		    changes->map.changed= _ExtendRange(changes->map.changed,
    		    				XkbModifierMapMask,minKC,
    	    					&changes->map.first_modmap_key,
    	    					&changes->map.num_modmap_keys);
    		}
    	    }
    	}
    	if (xkb->server) {
    	    if (xkb->server->behaviors) {
    		bzero((char *)&xkb->server->behaviors[minKC],
    						tmp*sizeof(XkbBehavior));
    		if (changes) {
    		    changes->map.changed= _ExtendRange(changes->map.changed,
    		    			XkbKeyBehaviorsMask,minKC,
        					&changes->map.first_key_behavior,
        					&changes->map.num_key_behaviors);
    		}
    	    }
    	    if (xkb->server->key_acts) {
    		bzero((char *)&xkb->server->key_acts[minKC],
    						tmp*sizeof(unsigned short));
    		if (changes) {
    		    changes->map.changed= _ExtendRange(changes->map.changed,
    		    			XkbKeyActionsMask,minKC,
        					&changes->map.first_key_act,
        					&changes->map.num_key_acts);
    		}
    	    }
    	    if (xkb->server->vmodmap) {
    		bzero((char *)&xkb->server->vmodmap[minKC],
    						tmp*sizeof(unsigned short));
    		if (changes) {
    		    changes->map.changed= _ExtendRange(changes->map.changed,
    		    			XkbVirtualModMapMask,minKC,
    		    			&changes->map.first_modmap_key,
        					&changes->map.num_vmodmap_keys);
    		}
    	    }
    	}
    	if ((xkb->names)&&(xkb->names->keys)) {
    	    bzero((char *)&xkb->names->keys[minKC],tmp*sizeof(XkbKeyNameRec));
    	    if (changes) {
    		changes->names.changed= _ExtendRange(changes->names.changed,
    					XkbKeyNamesMask,minKC,
    					&changes->names.first_key,
        					&changes->names.num_keys);
    	    }
    	}
    	xkb->min_key_code= minKC;
        }
        if (maxKC>xkb->max_key_code) {
    	if (changes)
    	    changes->map.max_key_code= maxKC;
    	tmp= maxKC-xkb->max_key_code;
    	if (xkb->map)  {
    	    if (xkb->map->key_sym_map) {
    		XkbSymMapRec *prev_key_sym_map = xkb->map->key_sym_map;
    
    		xkb->map->key_sym_map= _XkbTypedRealloc(xkb->map->key_sym_map,
    						(maxKC+1),XkbSymMapRec);
    		if (!xkb->map->key_sym_map) {
    		    _XkbFree(prev_key_sym_map);
    		    return BadAlloc;
    		}
    		bzero((char *)&xkb->map->key_sym_map[xkb->max_key_code],
    					tmp*sizeof(XkbSymMapRec));
    		if (changes) {
    		    changes->map.changed= _ExtendRange(changes->map.changed,
    		    				XkbKeySymsMask,maxKC,
    	    					&changes->map.first_key_sym,
    	    					&changes->map.num_key_syms);
    		}
    	    }
    	    if (xkb->map->modmap) {
    		unsigned char *prev_modmap = xkb->map->modmap;
    
    		xkb->map->modmap= _XkbTypedRealloc(xkb->map->modmap,
    						(maxKC+1),unsigned char);
    		if (!xkb->map->modmap) {
    		    _XkbFree(prev_modmap);
    		    return BadAlloc;
    		}
    		bzero((char *)&xkb->map->modmap[xkb->max_key_code],tmp);
    		if (changes) {
    		    changes->map.changed= _ExtendRange(changes->map.changed,
    		    				XkbModifierMapMask,maxKC,
    	    					&changes->map.first_modmap_key,
    	    					&changes->map.num_modmap_keys);
    		}
    	    }
    	}
    	if (xkb->server) {
    	    if (xkb->server->behaviors) {
    		XkbBehavior *prev_behaviors = xkb->server->behaviors;
    
    		xkb->server->behaviors=_XkbTypedRealloc(xkb->server->behaviors,
    						(maxKC+1),XkbBehavior);
    		if (!xkb->server->behaviors) {
    		    _XkbFree(prev_behaviors);
    		    return BadAlloc;
    		}
    		bzero((char *)&xkb->server->behaviors[xkb->max_key_code],
    						tmp*sizeof(XkbBehavior));
    		if (changes) {
    		    changes->map.changed= _ExtendRange(changes->map.changed,
    		    			XkbKeyBehaviorsMask,maxKC,
        					&changes->map.first_key_behavior,
        					&changes->map.num_key_behaviors);
    		}
    	    }
    	    if (xkb->server->key_acts) {
    		unsigned short *prev_key_acts = xkb->server->key_acts;
    
    		xkb->server->key_acts= _XkbTypedRealloc(xkb->server->key_acts,
    						(maxKC+1),unsigned short);
    		if (!xkb->server->key_acts) {
    		    _XkbFree(prev_key_acts);
    		    return BadAlloc;
    		}
    		bzero((char *)&xkb->server->key_acts[xkb->max_key_code],
    						tmp*sizeof(unsigned short));
    		if (changes) {
    		    changes->map.changed= _ExtendRange(changes->map.changed,
    		    			XkbKeyActionsMask,maxKC,
        					&changes->map.first_key_act,
        					&changes->map.num_key_acts);
    		}
    	    }
    	    if (xkb->server->vmodmap) {
    		unsigned short *prev_vmodmap = xkb->server->vmodmap;
    
    		xkb->server->vmodmap= _XkbTypedRealloc(xkb->server->vmodmap,
    						(maxKC+1),unsigned short);
    		if (!xkb->server->vmodmap) {
    		    _XkbFree(prev_vmodmap);
    		    return BadAlloc;
    		}
    		bzero((char *)&xkb->server->vmodmap[xkb->max_key_code],
    						tmp*sizeof(unsigned short));
    		if (changes) {
    		    changes->map.changed= _ExtendRange(changes->map.changed,
    		    			XkbVirtualModMapMask,maxKC,
    		    			&changes->map.first_modmap_key,
        					&changes->map.num_vmodmap_keys);
    		}
    	    }
    	}
    	if ((xkb->names)&&(xkb->names->keys)) {
    	    XkbKeyNameRec *prev_keys = xkb->names->keys;
    
    	    xkb->names->keys= _XkbTypedRealloc(xkb->names->keys,
    	    					(maxKC+1),XkbKeyNameRec);
    	    if (!xkb->names->keys) {
    		_XkbFree(prev_keys);
    		return BadAlloc;
    	    }
    	    bzero((char *)&xkb->names->keys[xkb->max_key_code],
    	    					tmp*sizeof(XkbKeyNameRec));
    	    if (changes) {
    		changes->names.changed= _ExtendRange(changes->names.changed,
    					XkbKeyNamesMask,maxKC,
    					&changes->names.first_key,
        					&changes->names.num_keys);
    	    }
    	}
    	xkb->max_key_code= maxKC;
        }
        return Success;
    }
    
    XkbAction *
    XkbcResizeKeyActions(XkbcDescPtr xkb,int key,int needed)
    {
    register int i,nActs;
    XkbAction *newActs;
    
        if (needed==0) {
    	xkb->server->key_acts[key]= 0;
    	return NULL;
        }
        if (XkbKeyHasActions(xkb,key)&&(XkbKeyNumSyms(xkb,key)>=(unsigned)needed))
    	return XkbKeyActionsPtr(xkb,key);
        if (xkb->server->size_acts-xkb->server->num_acts>=(unsigned)needed) {
    	xkb->server->key_acts[key]= xkb->server->num_acts;
    	xkb->server->num_acts+= needed;
    	return &xkb->server->acts[xkb->server->key_acts[key]];
        }
        xkb->server->size_acts= xkb->server->num_acts+needed+8;
        newActs = _XkbTypedCalloc(xkb->server->size_acts,XkbAction);
        if (newActs==NULL)
    	return NULL;
        newActs[0].type = XkbSA_NoAction;
        nActs = 1;
        for (i=xkb->min_key_code;i<=(int)xkb->max_key_code;i++) {
    	int nKeyActs,nCopy;
    
    	if ((xkb->server->key_acts[i]==0)&&(i!=key))
    	    continue;
    
    	nCopy= nKeyActs= XkbKeyNumActions(xkb,i);
    	if (i==key) {
    	    nKeyActs= needed;
    	    if (needed<nCopy)
    		nCopy= needed;
    	}
    
    	if (nCopy>0)
    	    memcpy(&newActs[nActs],XkbKeyActionsPtr(xkb,i),
    						nCopy*sizeof(XkbAction));
    	if (nCopy<nKeyActs)
    	    bzero(&newActs[nActs+nCopy],(nKeyActs-nCopy)*sizeof(XkbAction));
    	xkb->server->key_acts[i]= nActs;
    	nActs+= nKeyActs;
        }
        _XkbFree(xkb->server->acts);
        xkb->server->acts = newActs;
        xkb->server->num_acts= nActs;
        return &xkb->server->acts[xkb->server->key_acts[key]];
    }
    
    void
    XkbcFreeClientMap(XkbcDescPtr xkb, unsigned what, Bool freeMap)
    {
        XkbClientMapPtr map;
    
        if (!xkb || !xkb->map)
            return;
    
        if (freeMap)
            what = XkbAllClientInfoMask;
        map = xkb->map;
    
        if (what & XkbKeyTypesMask) {
            if (map->types) {
                if (map->num_types > 0) {
                    int i;
                    XkbKeyTypePtr type;
    
                    for (i = 0, type = map->types; i < map->num_types; i++, type++) {
                        if (type->map) {
                            _XkbFree(type->map);
                            type->map = NULL;
                        }
                        if (type->preserve) {
                            _XkbFree(type->preserve);
                            type->preserve = NULL;
                        }
                        type->map_count = 0;
                        if (type->level_names) {
                            _XkbFree(type->level_names);
                            type->level_names = NULL;
                        }
                    }
                }
                _XkbFree(map->types);
                map->num_types = map->size_types = 0;
                map->types = NULL;
            }
        }
    
        if (what & XkbKeySymsMask) {
            if (map->key_sym_map) {
                _XkbFree(map->key_sym_map);
                map->key_sym_map = NULL;
            }
            if (map->syms) {
                _XkbFree(map->syms);
                map->size_syms = map->num_syms = 0;
                map->syms = NULL;
            }
        }
    
        if ((what & XkbModifierMapMask) && map->modmap) {
            _XkbFree(map->modmap);
            map->modmap = NULL;
        }
    
        if (freeMap) {
            _XkbFree(xkb->map);
            xkb->map = NULL;
        }
    }
    
    void
    XkbcFreeServerMap(XkbcDescPtr xkb, unsigned what, Bool freeMap)
    {
        XkbServerMapPtr map;
    
        if (!xkb || !xkb->server)
            return;
    
        if (freeMap)
            what = XkbAllServerInfoMask;
        map = xkb->server;
    
        if ((what & XkbExplicitComponentsMask) && map->explicit) {
            _XkbFree(map->explicit);
            map->explicit = NULL;
        }
    
        if (what & XkbKeyActionsMask) {
            if (map->key_acts) {
                _XkbFree(map->key_acts);
                map->key_acts = NULL;
            }
            if (map->acts) {
                _XkbFree(map->acts);
                map->num_acts = map->size_acts = 0;
                map->acts = NULL;
            }
        }
    
        if ((what & XkbKeyBehaviorsMask) && map->behaviors) {
            _XkbFree(map->behaviors);
            map->behaviors = NULL;
        }
    
        if ((what & XkbVirtualModMapMask) && map->vmodmap) {
            _XkbFree(map->vmodmap);
            map->vmodmap = NULL;
        }
    
        if (freeMap) {
            _XkbFree(xkb->server);
            xkb->server = NULL;
        }
    }