Name
wcwidth — determine columns needed for a wide
character
DESCRIPTION
The wcwidth
() function
returns the number of columns needed to represent the wide
character c
. If
c
is a printable wide
character, the value is at least 0. If c
is L'\0', the value is 0.
Otherwise −1 is returned.
RETURN VALUE
The wcwidth
() function
returns the number of column positions for c
.
CONFORMING TO
POSIX.1-2001.
Note that glibc before 2.2.5 used the prototype
NOTES
The behavior of wcwidth
()
depends on the LC_CTYPE
category of the current locale.
SEE ALSO
iswprint(3), wcswidth(3), feature_test_macros(7)
Copyright (c) Bruno Haible <haible@clisp.cons.org>
This is free documentation; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
References consulted:
GNU glibc-2 source code and manual
Dinkumware C library reference http://www.dinkumware.com/
OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html
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