Provided by: libx11-doc_1.4.99.1-0ubuntu2_all bug

NAME

       XkbFreeClientMap - Free memory used by the client map member of an XkbDescRec structure

SYNOPSIS

       void XkbFreeClientMap (XkbDescPtr xkb, unsigned int which, Bool free_all);

ARGUMENTS

       - xkb  keyboard description containing client map to free

       - which
              mask identifying components of map to free

       - free_all
              True => free all client components and map itself

DESCRIPTION

       XkbFreeClientMap  frees  the components of client map specified by which in the XkbDescRec
       structure specified by the xkb parameter and sets the  corresponding  structure  component
       values  to NULL. The which parameter specifies a combination of the client map masks shown
       in Table 1.

       If free_all is True, which is ignored; XkbFreeClientMap  frees  every  non-NULL  structure
       component  in  the  client  map, frees the XkbClientMapRec structure referenced by the map
       member of the xkb parameter, and sets the map member to NULL.

                      Table 1 XkbAllocClientMap Masks
       ──────────────────────────────────────────────────────────────
       Mask                 Effect
       ──────────────────────────────────────────────────────────────
       XkbKeyTypesMask      The  type_count  field   specifies   the
                            number of entries to preallocate for the
                            types field of the client  map.  If  the
                            type_count    field    is    less   than
                            XkbNumRequiredTypes returns BadValue.

       XkbKeySymsMask       The min_key_code and max_key_code fields
                            of   the   xkb  parameter  are  used  to
                            allocate the syms and key_sym_map fields
                            of   the  client  map.  The  fields  are
                            allocated to contain the maximum  number
                            of  entries necessary for max_key_code -
                            min_key_code + 1 keys.

       XkbModifierMapMask   The min_key_code and max_key_code fields
                            of   the   xkb  parameter  are  used  to
                            allocate the modmap field of the  client
                            map.  The  field is allocated to contain
                            the maximum number of entries  necessary
                            for  max_key_code  -  min_key_code  +  1
                            keys.

       NOTE: The min_key_code and max_key_code fields of the xkb parameter must be  legal  values
       if  the XkbKeySymsMask or XkbModifierMapMask masks are set in the which parameter. If they
       are not valid, XkbAllocClientMap returns BadValue.

STRUCTURES

       The complete description of an Xkb keyboard is  given  by  an  XkbDescRec.  The  component
       structures in the XkbDescRec represent the major Xkb components.

       typedef struct {
          struct _XDisplay * display;      /∗ connection to X server */
          unsigned short     flags;        /∗ private to Xkb, do not modify */
          unsigned short     device_spec;  /∗ device of interest */
          KeyCode            min_key_code; /∗ minimum keycode for device */
          KeyCode            max_key_code; /∗ maximum keycode for device */
          XkbControlsPtr     ctrls;        /∗ controls */
          XkbServerMapPtr    server;       /∗ server keymap */
          XkbClientMapPtr    map;          /∗ client keymap */
          XkbIndicatorPtr    indicators;   /∗ indicator map */
          XkbNamesPtr        names;        /∗ names for all components */
          XkbCompatMapPtr    compat;       /∗ compatibility map */
          XkbGeometryPtr     geom;         /∗ physical geometry of keyboard */
       } XkbDescRec, *XkbDescPtr;

       The  display  field  points  to  an X display structure. The flags field is private to the
       library: modifying flags may yield unpredictable results. The device_spec field  specifies
       the device identifier of the keyboard input device, or XkbUseCoreKeyboard, which specifies
       the core keyboard device. The min_key_code and max_key_code fields specify the  least  and
       greatest keycode that can be returned by the keyboard.

       Each  structure  component  has a corresponding mask bit that is used in function calls to
       indicate that the structure should be manipulated in some manner, such as allocating it or
       freeing  it. These masks and their relationships to the fields in the XkbDescRec are shown
       in Table 2.

               Table 2 Mask Bits for XkbDescRec
       ──────────────────────────────────────────────────
       Mask Bit               XkbDescRec Field   Value
       ──────────────────────────────────────────────────
       XkbControlsMask        ctrls              (1L<<0)
       XkbServerMapMask       server             (1L<<1)
       XkbIClientMapMask      map                (1L<<2)
       XkbIndicatorMapMask    indicators         (1L<<3)
       XkbNamesMask           names              (1L<<4)
       XkbCompatMapMask       compat             (1L<<5)
       XkbGeometryMask        geom               (1L<<6)
       XkbAllComponentsMask   All Fields         (0x7f)

       The map field of the complete Xkb keyboard description is a pointer to the Xkb client map,
       which is of type XkbClientMapRec:

          typedef struct {                   /∗ Client Map */
             unsigned char     size_types;   /∗ # occupied entries in types */
             unsigned char     num_types;    /∗ # entries in types */
             XkbKeyTypePtr     types;        /∗ vector of key types used by this keymap */
             unsigned short    size_syms;    /∗ length of the syms array */
             unsigned short    num_syms;     /∗ # entries in syms */
             KeySym *          syms;         /∗ linear 2d tables of keysyms, 1 per key */
             XkbSymMapPtr      key_sym_map;  /∗ 1 per keycode, maps keycode to syms */
             unsigned char *   modmap;       /∗ 1 per keycode, real mods bound to key */
       } XkbClientMapRec, *XkbClientMapPtr;

DIAGNOSTICS

       BadValue       An argument is out of range

SEE ALSO

       XkbAllocClientMap(3)