wcwidth (3)
NAME
wcwidth - determine columns needed for a wide characterSYNOPSIS
#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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