| 1 | /* File names on MS-DOS/Windows systems. |
| 2 | |
| 3 | Copyright (C) 2000-2001, 2004-2006, 2009-2020 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_ */ |