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CentOS 7.0 - man page for xkballocgeomprops (centos section 3)

XkbAllocGeomProps(3)			  XKB FUNCTIONS 		     XkbAllocGeomProps(3)

       XkbAllocGeomProps - Allocate geometry properties

       Status XkbAllocGeomProps (XkbGeometryPtr geom, int num_needed);

       - geom _summary_

       - num_needed

       Xkb provides a number of functions to allocate and free subcomponents of a keyboard geome-
       try. Use these functions to create or modify keyboard geometries.  Note that  these  func-
       tions  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.

       XkbAllocGeomProps allocates space for num_needed properties and adds them to the specified
       geometry geom.  No initialization of the properties is done.  A	geometry  property  asso-
       ciates an arbitrary string with an equally arbitrary name. Geometry properties can be used
       to provide hints to programs that display images of keyboards, but  they  are  not  inter-
       preted by Xkb. No other geometry structures refer to geometry properties.

       BadAlloc       Unable to allocate storage

       BadValue       An argument is out of range

X Version 11				   libX11 1.6.0 		     XkbAllocGeomProps(3)

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