53 lines
1.9 KiB
C
53 lines
1.9 KiB
C
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/* File names on MS-DOS/Windows systems.
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Copyright (C) 2000-2001, 2004-2006, 2009-2020 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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From Paul Eggert and Jim Meyering. */
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#ifndef _DOSNAME_H
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#define _DOSNAME_H
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#if (defined _WIN32 || defined __CYGWIN__ \
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|| defined __EMX__ || defined __MSDOS__ || defined __DJGPP__)
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/* This internal macro assumes ASCII, but all hosts that support drive
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letters use ASCII. */
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# define _IS_DRIVE_LETTER(C) (((unsigned int) (C) | ('a' - 'A')) - 'a' \
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<= 'z' - 'a')
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# define FILE_SYSTEM_PREFIX_LEN(Filename) \
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(_IS_DRIVE_LETTER ((Filename)[0]) && (Filename)[1] == ':' ? 2 : 0)
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# ifndef __CYGWIN__
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# define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 1
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# endif
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# define ISSLASH(C) ((C) == '/' || (C) == '\\')
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#else
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# define FILE_SYSTEM_PREFIX_LEN(Filename) 0
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# define ISSLASH(C) ((C) == '/')
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#endif
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#ifndef FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
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# define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 0
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#endif
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#if FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
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# define IS_ABSOLUTE_FILE_NAME(F) ISSLASH ((F)[FILE_SYSTEM_PREFIX_LEN (F)])
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# else
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# define IS_ABSOLUTE_FILE_NAME(F) \
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(ISSLASH ((F)[0]) || FILE_SYSTEM_PREFIX_LEN (F) != 0)
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#endif
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#define IS_RELATIVE_FILE_NAME(F) (! IS_ABSOLUTE_FILE_NAME (F))
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#endif /* DOSNAME_H_ */
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