wcsnlen(3) Library Functions Manual wcsnlen(3) wcsnlen - (libc -lc) #include size_t wcsnlen(const wchar_t s[], size_t maxlen); glibc ( feature_test_macros(7)): wcsnlen(): glibc 2.10: _POSIX_C_SOURCE >= 200809L glibc 2.10: _GNU_SOURCE wcsnlen() strnlen(3). s (L'\0') maxlen (: ). wcsnlen() maxlen s s[maxlen-1]. wcsnlen() wcslen(s) maxlen maxlen maxlen s. attributes(7). +------------+------------------------------------+--------------------+ || | | +------------+------------------------------------+--------------------+ |wcsnlen() | | MT-Safe | +------------+------------------------------------+--------------------+ POSIX.1-2008. glibc 2.1. strnlen(3), wcslen(3) 3 . . : . 6.18 8 2026 wcsnlen(3)