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SuSE 11.3 - man page for xkbcopykeytype (suse section 3)

XkbCopyKeyType(3)			  XKB FUNCTIONS 			XkbCopyKeyType(3)

       XkbCopyKeyType - Copy one XkbKeyTypeRec structures

       Status XkbCopyKeyType (XkbKeyTypePtr from, XkbKeyTypePtr into);

       - from pointer to XkbKeyTypeRec to be copied

       - into pointer to XkbKeyTypeRec to be changed

       XkbCopyKeyType  copies  the  key type specified by from to the key type specified by into.
       Both must point to legal XkbKeyTypeRec structures. Xkb assumes from and into point to dif-
       ferent places. As a result, overlaps can be fatal.  XkbCopyKeyType frees any existing map,
       preserve, and level_names in into prior to copying. If any allocation errors  occur  while
       copying	from  to  into, XkbCopyKeyType returns BadAlloc. Otherwise, XkbCopyKeyType copies
       from to into and returns Success.

       Key types are used to determine the shift level of a key given the current  state  of  the
       keyboard.  The  set of all possible key types for the Xkb keyboard description are held in
       the types field of the client map, whose total size is stored  in  size_types,  and  whose
       total  number  of  valid  entries is stored in num_types.  Key types are defined using the
       following structure:

       typedef struct { 		  /* Key Type */
	   XkbModsRec	     mods;	  /* modifiers used to compute shift level */
	   unsigned char     num_levels;  /* total # shift levels, do not modify directly */
	   unsigned char     map_count;   /* # entries in map, preserve (if non-NULL) */
	   XkbKTMapEntryPtr  map;	  /* vector of modifiers for each shift level */
	   XkbModsPtr	     preserve;	  /* mods to preserve for corresponding map entry */
	   Atom 	     name;	  /* name of key type */
	   Atom *	     level_names; /* array of names of each shift level */
       } XkbKeyTypeRec, *XkbKeyTypePtr;

       BadAlloc       Unable to allocate storage

X Version 11				   libX11 1.3.2 			XkbCopyKeyType(3)

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