1XkbFreeClientMap(3) XKB FUNCTIONS XkbFreeClientMap(3)
2
6 XkbFreeClientMap - Free memory used by the client map member of an Xkb‐
7 DescRec structure
8
10 void XkbFreeClientMap (XkbDescPtr xkb, unsigned int which, Bool
11 free_all);
12
14 - xkb keyboard description containing client map to free
15 - which
17 mask identifying components of map to free
18 - free_all
20 True => free all client components and map itself
21
23 XkbFreeClientMap frees the components of client map specified by which
24 in the XkbDescRec structure specified by the xkb parameter and sets the
25 corresponding structure component values to NULL. The which parameter
26 specifies a combination of the client map masks shown in Table 1.
27 If free_all is True, which is ignored; XkbFreeClientMap frees every
29 non-NULL structure component in the client map, frees the Xkb‐
30 ClientMapRec structure referenced by the map member of the xkb parame‐
31 ter, and sets the map member to NULL.
32 Table 1 XkbAllocClientMap Masks
35 ──────────────────────────────────────────────────────────────
36 Mask Effect
37 ──────────────────────────────────────────────────────────────
38 XkbKeyTypesMask The type_count field specifies the num‐
39 ber of entries to preallocate for the
40 types field of the client map. If the
41 type_count field is less than XkbNumRe‐
42 quiredTypes returns BadValue.
43 XkbKeySymsMask The min_key_code and max_key_code fields
45 of the xkb parameter are used to allo‐
46 cate the syms and key_sym_map fields of
47 the client map. The fields are allocated
48 to contain the maximum number of entries
49 necessary for max_key_code -
50 min_key_code + 1 keys.
51 XkbModifierMapMask The min_key_code and max_key_code fields
53 of the xkb parameter are used to allo‐
54 cate the modmap field of the client map.
55 The field is allocated to contain the
56 maximum number of entries necessary for
57 max_key_code - min_key_code + 1 keys.
58 NOTE: The min_key_code and max_key_code fields of the xkb parameter
60 must be legal values if the XkbKeySymsMask or XkbModifierMapMask masks
61 are set in the which parameter. If they are not valid, XkbAlloc‐
62 ClientMap returns BadValue.
63
65 The complete description of an Xkb keyboard is given by an XkbDescRec.
66 The component structures in the XkbDescRec represent the major Xkb com‐
67 ponents.
68 typedef struct {
70 struct _XDisplay * display; /∗ connection to X server */
71 unsigned short flags; /∗ private to Xkb, do not modify */
72 unsigned short device_spec; /∗ device of interest */
73 KeyCode min_key_code; /∗ minimum keycode for device */
74 KeyCode max_key_code; /∗ maximum keycode for device */
75 XkbControlsPtr ctrls; /∗ controls */
76 XkbServerMapPtr server; /∗ server keymap */
77 XkbClientMapPtr map; /∗ client keymap */
78 XkbIndicatorPtr indicators; /∗ indicator map */
79 XkbNamesPtr names; /∗ names for all components */
80 XkbCompatMapPtr compat; /∗ compatibility map */
81 XkbGeometryPtr geom; /∗ physical geometry of keyboard */
82 } XkbDescRec, *XkbDescPtr;
83 The display field points to an X display structure. The flags field is
85 private to the library: modifying flags may yield unpredictable re‐
86 sults. The device_spec field specifies the device identifier of the
87 keyboard input device, or XkbUseCoreKeyboard, which specifies the core
88 keyboard device. The min_key_code and max_key_code fields specify the
89 least and greatest keycode that can be returned by the keyboard.
90 Each structure component has a corresponding mask bit that is used in
92 function calls to indicate that the structure should be manipulated in
93 some manner, such as allocating it or freeing it. These masks and their
94 relationships to the fields in the XkbDescRec are shown in Table 2.
95 Table 2 Mask Bits for XkbDescRec
98 ──────────────────────────────────────────────────
99 Mask Bit XkbDescRec Field Value
100 ──────────────────────────────────────────────────
101 XkbControlsMask ctrls (1L<<0)
102 XkbServerMapMask server (1L<<1)
103 XkbIClientMapMask map (1L<<2)
104 XkbIndicatorMapMask indicators (1L<<3)
105 XkbNamesMask names (1L<<4)
106 XkbCompatMapMask compat (1L<<5)
107 XkbGeometryMask geom (1L<<6)
108 XkbAllComponentsMask All Fields (0x7f)
109 The map field of the complete Xkb keyboard description is a pointer to
111 the Xkb client map, which is of type XkbClientMapRec:
112 typedef struct { /∗ Client Map */
114 unsigned char size_types; /∗ # occupied entries in types */
115 unsigned char num_types; /∗ # entries in types */
116 XkbKeyTypePtr types; /∗ vector of key types used by this keymap */
117 unsigned short size_syms; /∗ length of the syms array */
118 unsigned short num_syms; /∗ # entries in syms */
119 KeySym * syms; /∗ linear 2d tables of keysyms, 1 per key */
120 XkbSymMapPtr key_sym_map; /∗ 1 per keycode, maps keycode to syms */
121 unsigned char * modmap; /∗ 1 per keycode, real mods bound to key */
122 } XkbClientMapRec, *XkbClientMapPtr;
123
126 BadValue An argument is out of range
127
129 XkbAllocClientMap(3)
130X Version 11 libX11 1.7.0 XkbFreeClientMap(3)