Xkb provides a number of functions to allocate and free subcomponents of a
keyboard geometry. Use these functions to create or modify keyboard geometries.
Note that these functions merely allocate space for the new element(s), and it
is up to you to fill in the values explicitly in your code. These allocation
sz_* but never touch
num_* (unless there is an allocation failure, in which case they reset both
num_* to zero). These functions return Success if they succeed, BadAlloc if they are
not able to allocate space, or BadValue if a parameter is not as expected.
The values of
free_all determine how much of the specified geometry is freed. The valid values for
#define XkbGeomPropertiesMask (1<<0)
#define XkbGeomColorsMask (1<<1)
#define XkbGeomShapesMask (1<<2)
#define XkbGeomSectionsMask (1<<3)
#define XkbGeomDoodadsMask (1<<4)
#define XkbGeomKeyAliasesMask (1<<5)
#define XkbGeomAllMask (0x3f)
free_all is True, the entire geometry is freed regardless of the value of
which. Otherwise, the portions of the geometry specified by
which are freed.