wcslen(3) Library Functions Manual wcslen(3) wcslen - (libc -lc) #include size_t wcslen(const wchar_t *s); wcslen() strlen(3). s (L'\0'). wcslen() s. attributes(7). +------------+------------------------------------+--------------------+ || | | +------------+------------------------------------+--------------------+ |wcslen() | | MT-Safe | +------------+------------------------------------+--------------------+ C11, POSIX.1-2008. POSIX.1-2001 C99. wcsnlen(3) . strlen(3) 3 . . : . 6.18 8 2026 wcslen(3)