Provided by: manpages-dev_5.13-1_all
NAME
wcwidth - determine columns needed for a wide character
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 │ └────────────────────────────────────────────────────────┴───────────────┴────────────────┘
CONFORMING TO
POSIX.1-2001, POSIX.1-2008. 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)
COLOPHON
This page is part of release 5.13 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.