wcswidth - get number of column positions of wide character string

Syntax	#include <wchar.h> int wcswidth(const wchar_t *pwcs, size_t n);
Description	wcswidth() determines the number of column positions required for n characters in the string pointed to by pwcs. If a null wide character code is encountered before n characters are exhausted, fewer than n characters are processed.
Return val.	Number of column positions for the wide character string pwcs.
	0	if pwcs points to a null wide character code.
	-1	if pwcs contains a non-printing wide character code.
Notes	Restriction This version of the C runtime system only supports 1-byte characters as wide character codes. They are of type wchar_t (see stddef.h). (End)
See also	wchar.h.