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Status XkbAllocGeomOverlays "(\^XkbSectionPtr " "section" "\^," "int " "num_needed" "\^);"
section section for which overlays should be allocated
num_needed number of new overlays required
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 functions increase sz_* but never touch num_* (unless there is an allocation failure, in which case they reset both sz_* and 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. XkbAllocGeomOverlays allocates num_needed overlays and adds them to the section. No initialization of the overlays is done.
15 BadAlloc Unable to allocate storage
15 BadValue An argument is out of range