WCWIDTH(3) Linux Programmer's Manual 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 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
C99.
Note that glibc before 2.2.5 used the prototype
int wcwidth(wint_t c);
SEE ALSOiswprint(3), wcswidth(3)NOTES
The behaviour of wcwidth() depends on the LC_CTYPE category of the cur‐
rent locale.
GNU 1999-07-25 WCWIDTH(3)