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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
   represent 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
   current locale.

SEE ALSO

   iswprint(3), wcswidth(3)

COLOPHON

   This page is part of release 4.09 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/.



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