67 # define HAS_DEVICE(Filename) \  argument
68     (_IS_DRIVE_LETTER ((Filename)[0]) && (Filename)[1] == ':')
69 # define FILE_SYSTEM_PREFIX_LEN(Filename) (HAS_DEVICE (Filename) ? 2 : 0)  argument
78 #  define IS_ABSOLUTE_FILE_NAME(Filename) \  argument
79      ISSLASH ((Filename)[FILE_SYSTEM_PREFIX_LEN (Filename)])
81 #  define IS_ABSOLUTE_FILE_NAME(Filename) \
82      (ISSLASH ((Filename)[0]) || HAS_DEVICE (Filename))
84 # define IS_RELATIVE_FILE_NAME(Filename) \  argument
85     (! (ISSLASH ((Filename)[0]) || HAS_DEVICE (Filename)))
86 # define IS_FILE_NAME_WITH_DIR(Filename) \  argument
87     (strchr ((Filename), '/') != NULL || strchr ((Filename), '\\') != NULL \
88      || HAS_DEVICE (Filename))
92 # define HAS_DEVICE(Filename) ((void) (Filename), 0)
93 # define FILE_SYSTEM_PREFIX_LEN(Filename) ((void) (Filename), 0)
95 # define IS_ABSOLUTE_FILE_NAME(Filename) ISSLASH ((Filename)[0])
96 # define IS_RELATIVE_FILE_NAME(Filename) (! ISSLASH ((Filename)[0]))
97 # define IS_FILE_NAME_WITH_DIR(Filename) (strchr ((Filename), '/') != NULL)