1 | /* File names on MS-DOS/Windows systems. |
2 | |
3 | Copyright (C) 2000-2001, 2004-2006, 2009-2019 Free Software Foundation, Inc. |
4 | |
5 | This program is free software: you can redistribute it and/or modify |
6 | it under the terms of the GNU General Public License as published by |
7 | the Free Software Foundation; either version 3 of the License, or |
8 | (at your option) any later version. |
9 | |
10 | This program is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | GNU General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU General Public License |
16 | along with this program. If not, see <https://www.gnu.org/licenses/>. |
17 | |
18 | From Paul Eggert and Jim Meyering. */ |
19 | |
20 | #ifndef _DOSNAME_H |
21 | #define _DOSNAME_H |
22 | |
23 | #if (defined _WIN32 || defined __CYGWIN__ \ |
24 | || defined __EMX__ || defined __MSDOS__ || defined __DJGPP__) |
25 | /* This internal macro assumes ASCII, but all hosts that support drive |
26 | letters use ASCII. */ |
27 | # define _IS_DRIVE_LETTER(C) (((unsigned int) (C) | ('a' - 'A')) - 'a' \ |
28 | <= 'z' - 'a') |
29 | # define FILE_SYSTEM_PREFIX_LEN(Filename) \ |
30 | (_IS_DRIVE_LETTER ((Filename)[0]) && (Filename)[1] == ':' ? 2 : 0) |
31 | # ifndef __CYGWIN__ |
32 | # define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 1 |
33 | # endif |
34 | # define ISSLASH(C) ((C) == '/' || (C) == '\\') |
35 | #else |
36 | # define FILE_SYSTEM_PREFIX_LEN(Filename) 0 |
37 | # define ISSLASH(C) ((C) == '/') |
38 | #endif |
39 | |
40 | #ifndef FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE |
41 | # define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 0 |
42 | #endif |
43 | |
44 | #if FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE |
45 | # define IS_ABSOLUTE_FILE_NAME(F) ISSLASH ((F)[FILE_SYSTEM_PREFIX_LEN (F)]) |
46 | # else |
47 | # define IS_ABSOLUTE_FILE_NAME(F) \ |
48 | (ISSLASH ((F)[0]) || FILE_SYSTEM_PREFIX_LEN (F) != 0) |
49 | #endif |
50 | #define IS_RELATIVE_FILE_NAME(F) (! IS_ABSOLUTE_FILE_NAME (F)) |
51 | |
52 | #endif /* DOSNAME_H_ */ |
53 | |