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man:wcwidth

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

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 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
     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 cur-
     rent locale.

SEE ALSO

     iswprint(3), wcswidth(3)

COLOPHON

     This page is part of release 4.16 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 2017-09-15 WCWIDTH(3)

/data/webs/external/dokuwiki/data/pages/man/wcwidth.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

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