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sync code with last improvements from OpenBSD

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.\" Copyright 1999 Oracle and/or its affiliates. All rights reserved.
.\"
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.TH XkbResizeKeySyms __libmansuffix__ __xorgversion__ "XKB FUNCTIONS"
.SH NAME
XkbResizeKeySyms \- Change the number of symbols bound to a key
.SH SYNOPSIS
.HP
.B KeySym * XkbResizeKeySyms
.BI "(\^XkbDescRec *" "xkb" "\^,"
.BI "int " "key" "\^,"
.BI "int " "needed" "\^);"
.if n .ti +5n
.if t .ti +.5i
.SH ARGUMENTS
.TP
.I \- xkb
keyboard description to be changed
.TP
.I \- key
keycode for key to modify
.TP
.I \- needed
new number of keysyms required for key
.SH DESCRIPTION
.LP
.I XkbResizeKeySyms
reserves the space needed for
.I needed
keysyms and returns a pointer to the beginning of the new array that holds the
keysyms. It adjusts the
.I offset
field of the
.I key_sym_map
entry for the key if necessary and can also change the
.I syms, num_syms,
and
.I size_syms
fields of
.I xkb->map
if it is necessary to reallocate the
.I syms
array.
.I XkbResizeKeySyms
does not modify either the width or number of groups associated with the key.
If
.I needed
is greater than the current number of keysyms for the key,
.I XkbResizeKeySyms
initializes all new keysyms in the array to NoSymbol.
Because the number of symbols needed by a key is normally computed as width *
number of groups, and
.I XkbResizeKeySyms
does not modify either the width or number of groups for the key, a discrepancy
exists upon return from
.I XkbResizeKeySyms
between the space allocated for the keysyms and the number required. The unused
entries in the list of symbols returned by
.I XkbResizeKeySyms
are not preserved across future calls to any of the map editing functions, so
you must update the key symbol mapping (which updates the width and number of
groups for the key) before calling another allocator function. A call to
.I XkbChangeTypesOfKey
will update the mapping.
If any allocation errors occur while resizing the number of symbols bound to the
key,
.I XkbResizeKeySyms
returns NULL.
.SH "SEE ALSO"
.BR XkbChangeTypesOfKey (__libmansuffix__),
.BR XkbResizeKeyActions (__libmansuffix__)
.SH NOTES
.LP
A change to the number of symbols bound to a key should be accompanied by a
change in the number of actions bound to a key. Refer to XkbResizeKeyActions for
more information on changing the number of actions bound to a key.