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NAME
wcwidth - determine columns needed for a wide character
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
bash
#define _XOPEN_SOURCE\n /* See feature_test_macros(7) */
\n#include <wchar.h>bash
int wcwidth(wchar_t \nc\n);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.1-2008.
HISTORY
POSIX.1-2001.
Note that before glibc 2.2.5, glibc used the prototype
bash
int wcwidth(wint_t \nc\n);NOTES
The behavior of wcwidth() depends on the LC_CTYPE category of the current locale.
SEE ALSO
iswprint(3), wcswidth(3)