XkbAllocClientMap(3) XKB FUNCTIONS XkbAllocClientMap(3)
NAME
XkbAllocClientMap - Allocate and initialize an empty client map descrip-
tion record
SYNOPSIS
Status XkbAllocClientMap (XkbDescPtr xkb, unsigned int which, unsigned
int type_count);
ARGUMENTS
xkb keyboard description in which to allocate client map
which mask selecting map components to allocate
type_count
value of num_types field in map to be allocated
DESCRIPTION
Calling XkbGetMap should be sufficient for most applications to get
client and server maps. As a result, most applications do not need to
directly allocate client and server maps.
If you change the number of key types or construct map components with-
out loading the necessary components from the X server, do not allocate
any map components directly using malloc or Xmalloc. Instead, use the
Xkb allocators, XkbAllocClientMap, and XkbAllocServerMap.
Similarly, use the Xkb destructors, XkbFreeClientMap, and
XkbFreeServerMap instead of free or Xfree.
XkbAllocClientMap allocates and initializes an empty client map in the
map field of the keyboard description specified by xkb. The which para-
meter specifies the particular components of the client map structure to
allocate and is a mask composed by a bitwise inclusive OR of one or more
of the masks shown in Table 1.
Table 1 XkbAllocClientMap Masks
──────────────────────────────────────────────────────────────
Mask Effect
──────────────────────────────────────────────────────────────
XkbKeyTypesMask The type_count field specifies the num-
ber of entries to preallocate for the
types field of the client map. If the
type_count field is less than XkbNumRe-
quiredTypes returns BadValue.
XkbKeySymsMask The min_key_code and max_key_code fields
of the xkb parameter are used to allo-
cate 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 allo-
cate 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 re-
turns BadValue.
If the client map of the keyboard description is not NULL, and any
fields are already allocated in the client map, XkbAllocClientMap does
not overwrite the existing values; it simply ignores that part of the
request. The only exception is the types array. If type_count is greater
than the current num_types field of the client map, XkbAllocClientMap
resizes the types array and resets the num_types field accordingly.
If XkbAllocClientMap is successful, it returns Success. Otherwise, it
can return either BadMatch, BadAlloc, or BadValue errors.
DIAGNOSTICS
BadAlloc Unable to allocate storage
BadMatch A compatible version of Xkb was not available in the
server or an argument has correct type and range, but is
otherwise invalid
BadValue An argument is out of range
SEE ALSO
XkbAllocClientMap(3), XkbAllocServerMap(3), XkbFreeClientMap,(3),
XkbFreeServerMap(3), XkbGetMap(3)
X Version 11 libX11 1.8.12 XkbAllocClientMap(3)
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