pub unsafe extern "C" fn av_dirname(
path: *mut c_char,
) -> *const c_char展开描述
Thread safe dirname. @param path the string to parse, on DOS both \ and / are considered separators. @return A pointer to a string that’s the parent directory of path. If path is a NULL pointer or points to an empty string, a pointer to a string “.” is returned. @note the function may modify the contents of the path, so copies should be passed.