wcslen - determine the length of a wide-character string
#include <wchar.h> size_t wcslen (const wchar_t *s);
The wcslen function is the wide-character equivalent of the strlen function. It determines the length of the wide- character string pointed to by s, not including the termi nating L'\0' character.
The wcslen function returns the number of wide characters in s.
ISO/ANSI C, UNIX98
strlen(3)