/*
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.
*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "xkbgeom.h"
#include "X11/extensions/XKBcommon.h"
#include "XKBcommonint.h"
#include <X11/extensions/XKB.h>

static void
_XkbFreeGeomLeafElems(Bool freeAll, int first, int count,
                      unsigned short *num_inout, unsigned short *sz_inout,
                      char **elems, unsigned int elem_sz)
{
    if (freeAll || !(*elems)) {
        *num_inout = *sz_inout = 0;
        if (*elems) {
            _XkbFree(*elems);
            *elems = NULL;
        }
        return;
    }

    if ((first >= (*num_inout)) || (first < 0) || (count < 1))
        return;

    if (first + count >= (*num_inout))
        /* truncating the array is easy */
        (*num_inout) = first;
    else {
        char *ptr = *elems;
        int extra = ((*num_inout) - first + count) * elem_sz;

        if (extra > 0)
            memmove(&ptr[first * elem_sz], &ptr[(first + count) * elem_sz],
                    extra);

        (*num_inout) -= count;
    }
}

typedef void (*ContentsClearFunc)(char *priv);

static void
_XkbFreeGeomNonLeafElems(Bool freeAll, int first, int count,
                         unsigned short *num_inout, unsigned short *sz_inout,
                         char **elems, unsigned int elem_sz,
                         ContentsClearFunc freeFunc)
{
    int i;
    char *ptr;

    if (freeAll) {
        first = 0;
        count = *num_inout;
    }
    else if ((first >= (*num_inout)) || (first < 0) || (count < 1))
        return;
    else if (first + count > (*num_inout))
        count = (*num_inout) - first;

    if (!(*elems))
        return;

    if (freeFunc) {
        ptr = *elems;
        ptr += first * elem_sz;
        for (i = 0; i < count; i++) {
            (*freeFunc)(ptr);
            ptr += elem_sz;
        }
    }

    if (freeAll) {
        *num_inout = *sz_inout = 0;
        if (*elems) {
            _XkbFree(*elems);
            *elems = NULL;
        }
    }
    else if (first + count >= (*num_inout))
        *num_inout = first;
    else {
        i = ((*num_inout) - first + count) * elem_sz;
        ptr = *elems;
        memmove(&ptr[first * elem_sz], &ptr[(first + count) * elem_sz], i);
        (*num_inout) -= count;
    }
}

static void
_XkbClearProperty(char *prop_in)
{
    XkbcPropertyPtr prop = (XkbcPropertyPtr)prop_in;

    if (prop->name) {
        _XkbFree(prop->name);
        prop->name = NULL;
    }
    if (prop->value) {
        _XkbFree(prop->value);
        prop->value = NULL;
    }
}

void
XkbcFreeGeomProperties(XkbcGeometryPtr geom, int first, int count, Bool freeAll)
{
    _XkbFreeGeomNonLeafElems(freeAll, first, count,
                             &geom->num_properties, &geom->sz_properties,
                             (char **)&geom->properties,
                             sizeof(XkbcPropertyRec),
                             _XkbClearProperty);
}

void
XkbcFreeGeomKeyAliases(XkbcGeometryPtr geom, int first, int count, Bool freeAll)
{
    _XkbFreeGeomLeafElems(freeAll, first, count,
                          &geom->num_key_aliases, &geom->sz_key_aliases,
                          (char **)&geom->key_aliases,
                          sizeof(XkbKeyAliasRec));
}

static void
_XkbClearColor(char *color_in)
{
    XkbcColorPtr color = (XkbcColorPtr)color_in;

    if (color->spec)
        _XkbFree(color->spec);
}

void
XkbcFreeGeomColors(XkbcGeometryPtr geom, int first, int count, Bool freeAll)
{
    _XkbFreeGeomNonLeafElems(freeAll, first, count,
                             &geom->num_colors, &geom->sz_colors,
                             (char **)&geom->colors, sizeof(XkbcColorRec),
                             _XkbClearColor);
}

void
XkbcFreeGeomPoints(XkbcOutlinePtr outline, int first, int count, Bool freeAll)
{
    _XkbFreeGeomLeafElems(freeAll, first, count,
                          &outline->num_points, &outline->sz_points,
                          (char **)&outline->points, sizeof(XkbcPointRec));
}

static void
_XkbClearOutline(char *outline_in)
{
    XkbcOutlinePtr outline = (XkbcOutlinePtr)outline_in;

    if (outline->points)
        XkbcFreeGeomPoints(outline, 0, outline->num_points, True);
}

void
XkbcFreeGeomOutlines(XkbcShapePtr shape, int first, int count, Bool freeAll)
{
    _XkbFreeGeomNonLeafElems(freeAll, first, count,
                             &shape->num_outlines, &shape->sz_outlines,
                             (char **)&shape->outlines, sizeof(XkbcOutlineRec),
                             _XkbClearOutline);
}

static void
_XkbClearShape(char *shape_in)
{
    XkbcShapePtr shape = (XkbcShapePtr)shape_in;

    if (shape->outlines)
        XkbcFreeGeomOutlines(shape, 0, shape->num_outlines, True);
}

void
XkbcFreeGeomShapes(XkbcGeometryPtr geom, int first, int count, Bool freeAll)
{
    _XkbFreeGeomNonLeafElems(freeAll, first, count,
                             &geom->num_shapes, &geom->sz_shapes,
                             (char **)&geom->shapes, sizeof(XkbcShapeRec),
                             _XkbClearShape);
}

void
XkbcFreeGeomOverlayKeys(XkbcOverlayRowPtr row, int first, int count,
                        Bool freeAll)
{
    _XkbFreeGeomLeafElems(freeAll, first, count,
                          &row->num_keys, &row->sz_keys,
                          (char **)&row->keys, sizeof(XkbcOverlayKeyRec));
}


static void
_XkbClearOverlayRow(char *row_in)
{
    XkbcOverlayRowPtr row = (XkbcOverlayRowPtr)row_in;

    if (row->keys)
        XkbcFreeGeomOverlayKeys(row, 0, row->num_keys, True);
}

void
XkbcFreeGeomOverlayRows(XkbcOverlayPtr overlay, int first, int count,
                        Bool freeAll)
{
    _XkbFreeGeomNonLeafElems(freeAll, first, count,
                             &overlay->num_rows, &overlay->sz_rows,
                             (char **)&overlay->rows,
                             sizeof(XkbcOverlayRowRec),
                             _XkbClearOverlayRow);
}


static void
_XkbClearOverlay(char *overlay_in)
{
    XkbcOverlayPtr overlay = (XkbcOverlayPtr)overlay_in;

    if (overlay->rows)
        XkbcFreeGeomOverlayRows(overlay, 0, overlay->num_rows, True);
}

void
XkbcFreeGeomOverlays(XkbcSectionPtr section, int first, int count, Bool freeAll)
{
    _XkbFreeGeomNonLeafElems(freeAll, first, count,
                             &section->num_overlays, &section->sz_overlays,
                             (char **)&section->overlays,
                             sizeof(XkbcOverlayRec),
                             _XkbClearOverlay);
}


void
XkbcFreeGeomKeys(XkbcRowPtr row, int first, int count, Bool freeAll)
{
    _XkbFreeGeomLeafElems(freeAll, first, count,
                          &row->num_keys, &row->sz_keys,
                          (char **)&row->keys, sizeof(XkbcKeyRec));
}


static void
_XkbClearRow(char *row_in)
{
    XkbcRowPtr row = (XkbcRowPtr)row_in;

    if (row->keys)
        XkbcFreeGeomKeys(row, 0, row->num_keys, True);
}

void
XkbcFreeGeomRows(XkbcSectionPtr section, int first, int count, Bool freeAll)
{
    _XkbFreeGeomNonLeafElems(freeAll, first, count,
                             &section->num_rows, &section->sz_rows,
                             (char **)&section->rows, sizeof(XkbcRowRec),
                             _XkbClearRow);
}


static void
_XkbClearSection(char *section_in)
{
    XkbcSectionPtr section = (XkbcSectionPtr)section_in;

    if (section->rows)
        XkbcFreeGeomRows(section, 0, section->num_rows, True);
    if (section->doodads) {
        XkbcFreeGeomDoodads(section->doodads, section->num_doodads, True);
        section->doodads = NULL;
    }
}

void
XkbcFreeGeomSections(XkbcGeometryPtr geom, int first, int count, Bool freeAll)
{
    _XkbFreeGeomNonLeafElems(freeAll, first, count,
                             &geom->num_sections, &geom->sz_sections,
                             (char **)&geom->sections, sizeof(XkbcSectionRec),
                             _XkbClearSection);
}


static void
_XkbClearDoodad(char *doodad_in)
{
    XkbcDoodadPtr doodad = (XkbcDoodadPtr)doodad_in;

    switch (doodad->any.type) {
    case XkbTextDoodad:
        if (doodad->text.text) {
            _XkbFree(doodad->text.text);
            doodad->text.text = NULL;
        }
        if (doodad->text.font) {
            _XkbFree(doodad->text.font);
            doodad->text.font = NULL;
        }
        break;

    case XkbLogoDoodad:
        if (doodad->logo.logo_name) {
            _XkbFree(doodad->logo.logo_name);
            doodad->logo.logo_name = NULL;
        }
        break;
    }
}

void
XkbcFreeGeomDoodads(XkbcDoodadPtr doodads, int nDoodads, Bool freeAll)
{
    int i;
    XkbcDoodadPtr doodad;

    if (doodads) {
        for (i = 0, doodad = doodads; i < nDoodads; i++, doodad++)
            _XkbClearDoodad((char *)doodad);
        if (freeAll)
            _XkbFree(doodads);
    }
}

void
XkbcFreeGeometry(XkbcGeometryPtr geom, unsigned which, Bool freeMap)
{
    if (!geom)
        return;

    if (freeMap)
        which = XkbGeomAllMask;

    if ((which & XkbGeomPropertiesMask) && geom->properties)
        XkbcFreeGeomProperties(geom, 0, geom->num_properties, True);

    if ((which & XkbGeomColorsMask) && geom->colors)
        XkbcFreeGeomColors(geom, 0, geom->num_colors, True);

    if ((which & XkbGeomShapesMask) && geom->shapes)
        XkbcFreeGeomShapes(geom, 0, geom->num_shapes, True);

    if ((which & XkbGeomSectionsMask) && geom->sections)
        XkbcFreeGeomSections(geom, 0, geom->num_sections, True);

    if ((which & XkbGeomDoodadsMask) && geom->doodads) {
        XkbcFreeGeomDoodads(geom->doodads, geom->num_doodads, True);
        geom->doodads = NULL;
        geom->num_doodads = geom->sz_doodads = 0;
    }

    if ((which & XkbGeomKeyAliasesMask) && geom->key_aliases)
        XkbcFreeGeomKeyAliases(geom, 0, geom->num_key_aliases, True);

    if (freeMap) {
        if (geom->label_font) {
            _XkbFree(geom->label_font);
            geom->label_font = NULL;
        }
        _XkbFree(geom);
    }
}

static int
_XkbGeomAlloc(char **old, unsigned short *num, unsigned short *total,
              int num_new, size_t sz_elem)
{
    if (num_new < 1)
        return Success;

    if (!(*old))
        *num = *total = 0;

    if ((*num) + num_new <= (*total))
        return Success;

    *total = (*num) + num_new;

    if (*old)
        *old = (char *)_XkbRealloc(*old, (*total) * sz_elem);
    else
        *old = (char *)_XkbCalloc(*total, sz_elem);
    if (!(*old)) {
        *total = *num = 0;
        return BadAlloc;
    }

    if (*num > 0) {
        char *tmp = *old;
        bzero(&tmp[sz_elem * (*num)], num_new * sz_elem);
    }

    return Success;
}

#define _XkbAllocProps(g, n)    _XkbGeomAlloc((char **)&(g)->properties, \
                                              &(g)->num_properties, \
                                              &(g)->sz_properties, \
                                              (n), sizeof(XkbcPropertyRec))
#define _XkbAllocColors(g, n)   _XkbGeomAlloc((char **)&(g)->colors, \
                                              &(g)->num_colors, \
                                              &(g)->sz_colors, \
                                              (n), sizeof(XkbcColorRec))
#define _XkbAllocShapes(g, n)   _XkbGeomAlloc((char **)&(g)->shapes, \
                                              &(g)->num_shapes, \
                                              &(g)->sz_shapes, \
                                              (n), sizeof(XkbcShapeRec))
#define _XkbAllocSections(g, n) _XkbGeomAlloc((char **)&(g)->sections, \
                                              &(g)->num_sections, \
                                              &(g)->sz_sections, \
                                              (n), sizeof(XkbcSectionRec))
#define _XkbAllocDoodads(g, n)  _XkbGeomAlloc((char **)&(g)->doodads, \
                                              &(g)->num_doodads, \
                                              &(g)->sz_doodads, \
                                              (n), sizeof(XkbcDoodadRec))
#define _XkbAllocKeyAliases(g, n)   _XkbGeomAlloc((char **)&(g)->key_aliases, \
                                                  &(g)->num_key_aliases, \
                                                  &(g)->sz_key_aliases, \
                                                  (n), sizeof(XkbKeyAliasRec))

#define _XkbAllocOutlines(s, n) _XkbGeomAlloc((char **)&(s)->outlines, \
                                              &(s)->num_outlines, \
                                              &(s)->sz_outlines, \
                                              (n), sizeof(XkbcOutlineRec))
#define _XkbAllocRows(s, n)     _XkbGeomAlloc((char **)&(s)->rows, \
                                              &(s)->num_rows, \
                                              &(s)->sz_rows, \
                                              (n), sizeof(XkbcRowRec))
#define _XkbAllocPoints(o, n)   _XkbGeomAlloc((char **)&(o)->points, \
                                              &(o)->num_points, \
                                              &(o)->sz_points, \
                                              (n), sizeof(XkbcPointRec))
#define _XkbAllocKeys(r, n)     _XkbGeomAlloc((char **)&(r)->keys, \
                                              &(r)->num_keys, \
                                              &(r)->sz_keys, \
                                              (n), sizeof(XkbcKeyRec))
#define _XkbAllocOverlays(s, n) _XkbGeomAlloc((char **)&(s)->overlays, \
                                              &(s)->num_overlays, \
                                              &(s)->sz_overlays, \
                                              (n), sizeof(XkbcOverlayRec))
#define _XkbAllocOverlayRows(o, n)  _XkbGeomAlloc((char **)&(o)->rows, \
                                                  &(o)->num_rows, \
                                                  &(o)->sz_rows, \
                                                  (n), sizeof(XkbcOverlayRowRec))
#define _XkbAllocOverlayKeys(r, n)  _XkbGeomAlloc((char **)&(r)->keys, \
                                                  &(r)->num_keys, \
                                                  &(r)->sz_keys, \
                                                  (n), sizeof(XkbcOverlayKeyRec))

int
XkbcAllocGeomProps(XkbcGeometryPtr geom, int nProps)
{
    return _XkbAllocProps(geom, nProps);
}

int
XkbcAllocGeomColors(XkbcGeometryPtr geom, int nColors)
{
    return _XkbAllocColors(geom, nColors);
}

int
XkbcAllocGeomKeyAliases(XkbcGeometryPtr geom, int nKeyAliases)
{
    return _XkbAllocKeyAliases(geom, nKeyAliases);
}

int
XkbcAllocGeomShapes(XkbcGeometryPtr geom, int nShapes)
{
    return _XkbAllocShapes(geom, nShapes);
}

int
XkbcAllocGeomSections(XkbcGeometryPtr geom, int nSections)
{
    return _XkbAllocSections(geom, nSections);
}

int
XkbcAllocGeomOverlays(XkbcSectionPtr section, int nOverlays)
{
    return _XkbAllocOverlays(section, nOverlays);
}

int
XkbcAllocGeomOverlayRows(XkbcOverlayPtr overlay, int nRows)
{
    return _XkbAllocOverlayRows(overlay, nRows);
}

int
XkbcAllocGeomOverlayKeys(XkbcOverlayRowPtr row, int nKeys)
{
    return _XkbAllocOverlayKeys(row, nKeys);
}

int
XkbcAllocGeomDoodads(XkbcGeometryPtr geom, int nDoodads)
{
    return _XkbAllocDoodads(geom, nDoodads);
}

int
XkbcAllocGeomSectionDoodads(XkbcSectionPtr section, int nDoodads)
{
    return _XkbAllocDoodads(section, nDoodads);
}

int
XkbcAllocGeomOutlines(XkbcShapePtr shape, int nOL)
{
    return _XkbAllocOutlines(shape, nOL);
}

int
XkbcAllocGeomRows(XkbcSectionPtr section, int nRows)
{
    return _XkbAllocRows(section, nRows);
}

int
XkbcAllocGeomPoints(XkbcOutlinePtr ol, int nPts)
{
    return _XkbAllocPoints(ol, nPts);
}

int
XkbcAllocGeomKeys(XkbcRowPtr row, int nKeys)
{
    int ret = _XkbAllocKeys(row, nKeys);
    fprintf(stderr, "!!! allocated %d keys at %p\n", nKeys, row->keys);
    return ret;
}

int
XkbcAllocGeometry(XkbcDescPtr xkb, XkbcGeometrySizesPtr sizes)
{
    XkbcGeometryPtr geom;
    int rtrn;

    if (!xkb->geom) {
        xkb->geom = _XkbTypedCalloc(1, XkbcGeometryRec);
        if (!xkb->geom)
            return BadAlloc;
    }
    geom = xkb->geom;

    if ((sizes->which & XkbGeomPropertiesMask) &&
        ((rtrn = _XkbAllocProps(geom, sizes->num_properties)) != Success))
        goto bail;

    if ((sizes->which & XkbGeomColorsMask) &&
        ((rtrn = _XkbAllocColors(geom, sizes->num_colors)) != Success))
        goto bail;

    if ((sizes->which & XkbGeomShapesMask) &&
        ((rtrn = _XkbAllocShapes(geom, sizes->num_shapes)) != Success))
        goto bail;

    if ((sizes->which & XkbGeomSectionsMask) &&
        ((rtrn = _XkbAllocSections(geom, sizes->num_sections)) != Success))
        goto bail;

    if ((sizes->which & XkbGeomDoodadsMask) &&
        ((rtrn = _XkbAllocDoodads(geom, sizes->num_doodads)) != Success))
        goto bail;

    if ((sizes->which & XkbGeomKeyAliasesMask) &&
        ((rtrn = _XkbAllocKeyAliases(geom, sizes->num_key_aliases)) != Success))
        goto bail;

    return Success;
bail:
    XkbcFreeGeometry(geom, XkbGeomAllMask, True);
    xkb->geom = NULL;
    return rtrn;
}

XkbcPropertyPtr
XkbcAddGeomProperty(XkbcGeometryPtr geom,char *name,char *value)
{
register int i;
register XkbcPropertyPtr prop;

    if ((!geom)||(!name)||(!value))
	return NULL;
    for (i=0,prop=geom->properties;i<geom->num_properties;i++,prop++) {
	if ((prop->name)&&(strcmp(name,prop->name)==0)) {
	    if (prop->value)
		_XkbFree(prop->value);
	    prop->value= (char *)_XkbAlloc(strlen(value)+1);
	    if (prop->value)
		strcpy(prop->value,value);
	    return prop;
	}
    }
    if ((geom->num_properties>=geom->sz_properties)&&
					(_XkbAllocProps(geom,1)!=Success)) {
	return NULL;
    }
    prop= &geom->properties[geom->num_properties];
    prop->name= (char *)_XkbAlloc(strlen(name)+1);
    if (!name)
	return NULL;
    strcpy(prop->name,name);
    prop->value= (char *)_XkbAlloc(strlen(value)+1);
    if (!value) {
	_XkbFree(prop->name);
	prop->name= NULL;
	return NULL;
    }
    strcpy(prop->value,value);
    geom->num_properties++;
    return prop;
}

XkbKeyAliasPtr
XkbcAddGeomKeyAlias(XkbcGeometryPtr geom,char *aliasStr,char *realStr)
{
register int i;
register XkbKeyAliasPtr alias;

    if ((!geom)||(!aliasStr)||(!realStr)||(!aliasStr[0])||(!realStr[0]))
	return NULL;
    for (i=0,alias=geom->key_aliases;i<geom->num_key_aliases;i++,alias++) {
	if (strncmp(alias->alias,aliasStr,XkbKeyNameLength)==0) {
	    bzero(alias->real,XkbKeyNameLength);
	    strncpy(alias->real,realStr,XkbKeyNameLength);
	    return alias;
	}
    }
    if ((geom->num_key_aliases>=geom->sz_key_aliases)&&
				(_XkbAllocKeyAliases(geom,1)!=Success)) {
	return NULL;
    }
    alias= &geom->key_aliases[geom->num_key_aliases];
    bzero(alias,sizeof(XkbKeyAliasRec));
    strncpy(alias->alias,aliasStr,XkbKeyNameLength);
    strncpy(alias->real,realStr,XkbKeyNameLength);
    geom->num_key_aliases++;
    return alias;
}

XkbcColorPtr
XkbcAddGeomColor(XkbcGeometryPtr geom,char *spec,unsigned int pixel)
{
register int i;
register XkbcColorPtr color;

    if ((!geom)||(!spec))
	return NULL;
    for (i=0,color=geom->colors;i<geom->num_colors;i++,color++) {
	if ((color->spec)&&(strcmp(color->spec,spec)==0)) {
	    color->pixel= pixel;
	    return color;
	}
    }
    if ((geom->num_colors>=geom->sz_colors)&&
					(_XkbAllocColors(geom,1)!=Success)) {
	return NULL;
    }
    color= &geom->colors[geom->num_colors];
    color->pixel= pixel;
    color->spec= (char *)_XkbAlloc(strlen(spec)+1);
    if (!color->spec)
	return NULL;
    strcpy(color->spec,spec);
    geom->num_colors++;
    return color;
}

XkbcOutlinePtr
XkbcAddGeomOutline(XkbcShapePtr shape,int sz_points)
{
XkbcOutlinePtr	outline;

    if ((!shape)||(sz_points<0))
	return NULL;
    if ((shape->num_outlines>=shape->sz_outlines)&&
					(_XkbAllocOutlines(shape,1)!=Success)) {
	return NULL;
    }
    outline= &shape->outlines[shape->num_outlines];
    bzero(outline,sizeof(XkbcOutlineRec));
    if ((sz_points>0)&&(_XkbAllocPoints(outline,sz_points)!=Success))
	return NULL;
    shape->num_outlines++;
    return outline;
}

XkbcShapePtr
XkbcAddGeomShape(XkbcGeometryPtr geom,CARD32 name,int sz_outlines)
{
XkbcShapePtr	shape;
register int	i;

    if ((!geom)||(!name)||(sz_outlines<0))
	return NULL;
    if (geom->num_shapes>0) {
	for (shape=geom->shapes,i=0;i<geom->num_shapes;i++,shape++) {
	    if (name==shape->name)
		return shape;
	}
    }
    if ((geom->num_shapes>=geom->sz_shapes)&&
					(_XkbAllocShapes(geom,1)!=Success))
	return NULL;
    shape= &geom->shapes[geom->num_shapes];
    bzero(shape,sizeof(XkbcShapeRec));
    if ((sz_outlines>0)&&(_XkbAllocOutlines(shape,sz_outlines)!=Success))
	return NULL;
    shape->name= name;
    shape->primary= shape->approx= NULL;
    geom->num_shapes++;
    return shape;
}

XkbcKeyPtr
XkbcAddGeomKey(XkbcRowPtr row)
{
XkbcKeyPtr	key;
    if (!row)
	return NULL;
    if ((row->num_keys>=row->sz_keys)&&(_XkbAllocKeys(row,1)!=Success))
	return NULL;
    key= &row->keys[row->num_keys++];
    bzero(key,sizeof(XkbcKeyRec));
    return key;
}

XkbcRowPtr
XkbcAddGeomRow(XkbcSectionPtr section,int sz_keys)
{
XkbcRowPtr	row;

    if ((!section)||(sz_keys<0))
	return NULL;
    if ((section->num_rows>=section->sz_rows)&&
    					(_XkbAllocRows(section,1)!=Success))
	return NULL;
    row= &section->rows[section->num_rows];
    bzero(row,sizeof(XkbcRowRec));
    if ((sz_keys>0)&&(_XkbAllocKeys(row,sz_keys)!=Success))
	return NULL;
    section->num_rows++;
    return row;
}

XkbcSectionPtr
XkbcAddGeomSection(	XkbcGeometryPtr	geom,
			CARD32		name,
			int		sz_rows,
			int		sz_doodads,
			int		sz_over)
{
register int	i;
XkbcSectionPtr	section;

    if ((!geom)||(name==None)||(sz_rows<0))
	return NULL;
    for (i=0,section=geom->sections;i<geom->num_sections;i++,section++) {
	if (section->name!=name)
	    continue;
	if (((sz_rows>0)&&(_XkbAllocRows(section,sz_rows)!=Success))||
	    ((sz_doodads>0)&&(_XkbAllocDoodads(section,sz_doodads)!=Success))||
	    ((sz_over>0)&&(_XkbAllocOverlays(section,sz_over)!=Success)))
	    return NULL;
	return section;
    }
    if ((geom->num_sections>=geom->sz_sections)&&
					(_XkbAllocSections(geom,1)!=Success))
	return NULL;
    section= &geom->sections[geom->num_sections];
    if ((sz_rows>0)&&(_XkbAllocRows(section,sz_rows)!=Success))
	return NULL;
    if ((sz_doodads>0)&&(_XkbAllocDoodads(section,sz_doodads)!=Success)) {
	if (section->rows) {
	    _XkbFree(section->rows);
	    section->rows= NULL;
	    section->sz_rows= section->num_rows= 0;
	}
	return NULL;
    }
    section->name= name;
    geom->num_sections++;
    return section;
}

XkbcDoodadPtr
XkbcAddGeomDoodad(XkbcGeometryPtr geom,XkbcSectionPtr section,CARD32 name)
{
XkbcDoodadPtr	old,doodad;
register int	i,nDoodads;

    if ((!geom)||(name==None))
	return NULL;
    if ((section!=NULL)&&(section->num_doodads>0)) {
	old= section->doodads;
	nDoodads= section->num_doodads;
    }
    else {
	old= geom->doodads;
	nDoodads= geom->num_doodads;
    }
    for (i=0,doodad=old;i<nDoodads;i++,doodad++) {
	if (doodad->any.name==name)
	    return doodad;
    }
    if (section) {
	if ((section->num_doodads>=geom->sz_doodads)&&
	    (_XkbAllocDoodads(section,1)!=Success)) {
	    return NULL;
	}
	doodad= &section->doodads[section->num_doodads++];
    }
    else {
	if ((geom->num_doodads>=geom->sz_doodads)&&
					(_XkbAllocDoodads(geom,1)!=Success))
	    return NULL;
	doodad= &geom->doodads[geom->num_doodads++];
    }
    bzero(doodad,sizeof(XkbcDoodadRec));
    doodad->any.name= name;
    return doodad;
}

XkbcOverlayKeyPtr
XkbcAddGeomOverlayKey(	XkbcOverlayPtr		overlay,
			XkbcOverlayRowPtr 	row,
			char *			over,
			char *			under)
{
register int	i;
XkbcOverlayKeyPtr key;
XkbcSectionPtr	section;
XkbcRowPtr	row_under;
Bool		found;

    if ((!overlay)||(!row)||(!over)||(!under))
	return NULL;
    section= overlay->section_under;
    if (row->row_under>=section->num_rows)
	return NULL;
    row_under= &section->rows[row->row_under];
    for (i=0,found=False;i<row_under->num_keys;i++) {
	if (strncmp(under,row_under->keys[i].name.name,XkbKeyNameLength)==0) {
	    found= True;
	    break;
	}
    }
    if (!found)
   	return NULL;
    if ((row->num_keys>=row->sz_keys)&&(_XkbAllocOverlayKeys(row,1)!=Success))
	return NULL;
    key= &row->keys[row->num_keys];
    strncpy(key->under.name,under,XkbKeyNameLength);
    strncpy(key->over.name,over,XkbKeyNameLength);
    row->num_keys++;
    return key;
}

XkbcOverlayRowPtr
XkbcAddGeomOverlayRow(XkbcOverlayPtr overlay,int row_under,int sz_keys)
{
register int		i;
XkbcOverlayRowPtr	row;

    if ((!overlay)||(sz_keys<0))
	return NULL;
    if (row_under>=overlay->section_under->num_rows)
	return NULL;
    for (i=0;i<overlay->num_rows;i++) {
	if (overlay->rows[i].row_under==row_under) {
	    row= &overlay->rows[i];
	    if ((row->sz_keys<sz_keys)&&
				(_XkbAllocOverlayKeys(row,sz_keys)!=Success)) {
		return NULL;
	    }
	    return &overlay->rows[i];
	}
    }
    if ((overlay->num_rows>=overlay->sz_rows)&&
				(_XkbAllocOverlayRows(overlay,1)!=Success))
	return NULL;
    row= &overlay->rows[overlay->num_rows];
    bzero(row,sizeof(XkbcOverlayRowRec));
    if ((sz_keys>0)&&(_XkbAllocOverlayKeys(row,sz_keys)!=Success))
	return NULL;
    row->row_under= row_under;
    overlay->num_rows++;
    return row;
}

XkbcOverlayPtr
XkbcAddGeomOverlay(XkbcSectionPtr section,CARD32 name,int sz_rows)
{
register int	i;
XkbcOverlayPtr	overlay;

    if ((!section)||(name==None)||(sz_rows==0))
	return NULL;

    for (i=0,overlay=section->overlays;i<section->num_overlays;i++,overlay++) {
	if (overlay->name==name) {
	    if ((sz_rows>0)&&(_XkbAllocOverlayRows(overlay,sz_rows)!=Success))
		return NULL;
	    return overlay;
	}
    }
    if ((section->num_overlays>=section->sz_overlays)&&
				(_XkbAllocOverlays(section,1)!=Success))
	return NULL;
    overlay= &section->overlays[section->num_overlays];
    if ((sz_rows>0)&&(_XkbAllocOverlayRows(overlay,sz_rows)!=Success))
	return NULL;
    overlay->name= name;
    overlay->section_under= section;
    section->num_overlays++;
    return overlay;
}