XkbCopyKeyType man page on Hurd

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XkbCopyKeyType(3)		 XKB FUNCTIONS		     XkbCopyKeyType(3)

NAME
       XkbCopyKeyType - Copy one XkbKeyTypeRec structures

SYNOPSIS
       Status XkbCopyKeyType (XkbKeyTypePtr from, XkbKeyTypePtr into);

ARGUMENTS
       - from pointer to XkbKeyTypeRec to be copied

       - into pointer to XkbKeyTypeRec to be changed

DESCRIPTION
       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 different places. As a result, over‐
       laps 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. Oth‐
       erwise, XkbCopyKeyType copies from to into and returns Success.

STRUCTURES
       Key types are used to determine the shift level of a key given the cur‐
       rent 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;

DIAGNOSTICS
       BadAlloc	      Unable to allocate storage

X Version 11			 libX11 1.6.2		     XkbCopyKeyType(3)
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