wcwidth man page on Ubuntu

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

NAME
       wcwidth - determine columns needed for a wide character

SYNOPSIS
       #define _XOPEN_SOURCE
       #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 L'\0', the value is 0.  Otherwise -1 is
       returned.

RETURN VALUE
       The wcwidth() function returns the number of column positions for c.

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), feature_test_macros(7)

COLOPHON
       This  page  is  part of release 3.23 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

GNU				  1999-07-25			    WCWIDTH(3)
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