ISDIR
#define ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#define ISDIR(A) ((A.st_mode & S_IFMT) == S_IFDIR)
#define ISDIR(A) ((A.st_mode & S_IFMT) == S_IFDIR)
#define ISDIR(A) ((A.st_mode & S_IFMT) == S_IFDIR)
#define ISDIR(A) ((A.st_mode & S_IFMT) == S_IFDIR)