wcwidth(3)                Library Functions Manual                wcwidth(3)

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 repre‐
       sent  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 attrib‐
       utes(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

       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)

Linux man-pages 6.7              2023-10-31                       wcwidth(3)