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
   Multithreading (see pthreads(7))
       The wcwidth() function is  thread-safe  with  exceptions.   It  can  be
       safely  used  in multithreaded applications, as long as setlocale(3) is
       not called to change the locale during its execution.

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  cur-
       rent locale.

SEE ALSO
       iswprint(3), wcswidth(3)

COLOPHON
       This  page  is  part of release 3.74 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
       http://www.kernel.org/doc/man-pages/.

GNU                               2014-01-22                        WCWIDTH(3)

Czas wygenerowania: 0.00011 sek.

Created with the man page lookup class by Andrew Collington.
Based on a C man page viewer by Vadim Pavlov
Unicode soft-hyphen fix (as used by RedHat) by Dan Edwards
Some optimisations by Eli Argon
Caching idea and code contribution by James Richardson

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