1 /* File names on MS-DOS/Windows systems.
3 Copyright (C) 2000-2001, 2004-2006, 2009-2015 Free Software
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 From Paul Eggert and Jim Meyering. */
24 #if (defined _WIN32 || defined __WIN32__ || \
25 defined __MSDOS__ || defined __CYGWIN__ || \
26 defined __EMX__ || defined __DJGPP__)
27 /* This internal macro assumes ASCII, but all hosts that support drive
29 # define _IS_DRIVE_LETTER(C) (((unsigned int) (C) | ('a' - 'A')) - 'a' \
31 # define FILE_SYSTEM_PREFIX_LEN(Filename) \
32 (_IS_DRIVE_LETTER ((Filename)[0]) && (Filename)[1] == ':' ? 2 : 0)
34 # define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 1
36 # define ISSLASH(C) ((C) == '/' || (C) == '\\')
38 # define FILE_SYSTEM_PREFIX_LEN(Filename) 0
39 # define ISSLASH(C) ((C) == '/')
42 #ifndef FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
43 # define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 0
46 #if FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
47 # define IS_ABSOLUTE_FILE_NAME(F) ISSLASH ((F)[FILE_SYSTEM_PREFIX_LEN (F)])
49 # define IS_ABSOLUTE_FILE_NAME(F) \
50 (ISSLASH ((F)[0]) || FILE_SYSTEM_PREFIX_LEN (F) != 0)
52 #define IS_RELATIVE_FILE_NAME(F) (! IS_ABSOLUTE_FILE_NAME (F))
54 #endif /* DOSNAME_H_ */