wcwidth(3) [bsd man page]
WCWIDTH(3) Linux Programmer's Manual 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'