wcwidth
Section: C Library Functions (3)
Updated: 2023-02-05
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NAME
wcwidth - determine columns needed for a wide character
LIBRARY
Standard C library
(libc, -lc)
SYNOPSIS
#define _XOPEN_SOURCE /* See feature_test_macros(7) */
#include <wchar.h>
int wcwidth(wchar_t c);
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 null wide character (L'\0'), the value is 0.
Otherwise, -1 is returned.
RETURN VALUE
The
wcwidth()
function returns the number of
column positions for
c.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
wcwidth()
| Thread safety | MT-Safe locale
|
STANDARDS
POSIX.1-2001, POSIX.1-2008.
Note that before glibc 2.2.5, glibc used the prototype
int wcwidth(wint_t c);
NOTES
The behavior of
wcwidth()
depends on the
LC_CTYPE
category of the
current locale.
SEE ALSO
iswprint(3),
wcswidth(3)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- STANDARDS
-
- NOTES
-
- SEE ALSO
-
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