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.

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 current locale.

SEE ALSO

iswprint(3), wcswidth(3)

COLOPHON

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