wcwidth - determine columns needed for a wide character


SYNOPSIS

       #include <wchar.h>

       int wcwidth (wint_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 L'\0',
       the value is 0. Otherwise -1 is returned.


RETURN VALUE

       The wcwidth function returns the number  of  column  posi­
       tions for c.


CONFORMING TO

       UNIX98


SEE ALSO

       wcswidth(3), iswprint(3)


NOTES

       The  behaviour of wcwidth depends on the LC_CTYPE category
       of the current locale.


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