wcwidth(3)
NAME
wcwidth - determine columns needed for a wide character
SYNOPSIS
#define _XOPEN_SOURCE #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 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
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), feature_test_macros(7)
COLOPHON
- This page is part of release 3.25 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.