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1 | /* File names on MS-DOS/Windows systems. |
2 | ||
5df4cba6 | 3 | Copyright (C) 2000-2001, 2004-2006, 2009-2020 Free Software Foundation, Inc. |
2196f55f YQ |
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 | |
c0c3707f | 16 | along with this program. If not, see <https://www.gnu.org/licenses/>. |
2196f55f YQ |
17 | |
18 | From Paul Eggert and Jim Meyering. */ | |
19 | ||
20 | #ifndef _DOSNAME_H | |
21 | #define _DOSNAME_H | |
22 | ||
c0c3707f CB |
23 | #if (defined _WIN32 || defined __CYGWIN__ \ |
24 | || defined __EMX__ || defined __MSDOS__ || defined __DJGPP__) | |
2196f55f YQ |
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_ */ |