wcwidth (3)

NAME

       wcwidth - determine columns needed for a wide character

SYNOPSIS

       #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 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

       UNIX98. POSIX.1-2001.  Note that glibc before 2.2.5 used the prototype
       int wcwidth(wint_t c);

SEE ALSO

       wcswidth(3), iswprint(3)

NOTES

       The  behaviour  of wcwidth depends on the LC_CTYPE category of the cur-
       rent locale.

GNU                               1999-07-25                        wcwidth(3)