wcswidth(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

WCSWIDTH(3)             Linux Programmer's Manual            WCSWIDTH(3)

NAME         top

       wcswidth - determine columns needed for a fixed-size wide-
       character string

SYNOPSIS         top

       #define _XOPEN_SOURCE             /* See feature_test_macros(7) */
       #include <wchar.h>

       int wcswidth(const wchar_t *s, size_t n);

DESCRIPTION         top

       The wcswidth() function returns the number of columns needed to
       represent the wide-character string pointed to by s, but at most
       n wide characters.  If a nonprintable wide character occurs among
       these characters, -1 is returned.

RETURN VALUE         top

       The wcswidth() function returns the number of column positions
       for the wide-character string s, truncated to at most length n.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌───────────────────────────────┬───────────────┬────────────────┐
       │Interface                      Attribute     Value          │
       ├───────────────────────────────┼───────────────┼────────────────┤
       │wcswidth()                     │ Thread safety │ MT-Safe locale │
       └───────────────────────────────┴───────────────┴────────────────┘

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008.

NOTES         top

       The behavior of wcswidth() depends on the LC_CTYPE category of
       the current locale.

SEE ALSO         top

       iswprint(3), wcwidth(3)

COLOPHON         top

       This page is part of release 5.11 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/.

GNU                            2021-03-22                    WCSWIDTH(3)

Pages that refer to this page: wcwidth(3)utf-8(7)