XkbAddGeomKey - Add one key at the end of an existing row of keys

row    row to be updated

       Xkb  provides  functions to add a single new element to the top-level keyboard geometry. In each case the
       num_* fields of the corresponding structure is incremented by 1. These  functions  do  not  change  sz_*
       unless  there  is  no more room in the array. Some of these functions fill in the values of the element's
       structure from the arguments. For other functions, you must explicitly write code to fill the structure's
       elements.

       The top-level geometry  description  includes  a  list  of  geometryproperties.   A  geometry  property
       associates  an arbitrary string with an equally arbitrary name. Programs that display images of keyboards
       can use geometry properties as hints, but they are not interpreted by Xkb. No other  geometry  structures
       refer to geometry properties.

       Keys  are  grouped  into  rows.   XkbAddGeomKey adds one key to the end of the specified row.  The key is
       allocated and zeroed.  XkbAddGeomKey returns NULL if row is empty or if it was not able to allocate space
       for the key. To allocate space for an arbitrary number of keys to a row, use XkbAllocGeomKeys.

       XkbAddGeomKey - Add one key at the end of an existing row of keys

XkbAllocGeomKeys(3)

X Version 11                                      libX11 1.8.12                                 XkbAddGeomKey(3)

           typedef struct _XkbKey {              /* key in a row */
               XkbKeyNameRec   name;             /* key name */
               short           gap;              /* gap in mm/10 from previous key in row */
               unsigned char   shape_ndx;        /* index of shape for key */
               unsigned char   color_ndx;        /* index of color for key body */
           } XkbKeyRec, *XkbKeyPtr;

XkbKeyPtrXkbAddGeomKey(XkbRowPtrrow);