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

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XkbAllocGeomOverlayRows(3)		  XKB FUNCTIONS 	       XkbAllocGeomOverlayRows(3)

NAME
       XkbAllocGeomOverlayRows - Allocate rows in a overlay

SYNOPSIS
       Status XkbAllocGeomOverlayRows (XkbOverlayPtr overlay, int num_needed);

ARGUMENTS
       - overlay
	      section for which rows should be allocated

       - num_needed
	      number of new rows required

DESCRIPTION
       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.

       XkbAllocGeomOverlayRows	allocates  num_needed rows and adds them to the overlay.  No ini-
       tialization of the rows is done.

       To free rows in an overlay, use XkbFreeGeomOverlayRows.

DIAGNOSTICS
       BadAlloc       Unable to allocate storage

       BadValue       An argument is out of range

SEE ALSO
       XkbFreeGeomOverlayRows(3)

X Version 11				   libX11 1.6.0 	       XkbAllocGeomOverlayRows(3)
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