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emacs/lib/dosname.h
Paul Eggert 39c2fa3f4e Merge from gnulib and try to repair bad merge
This attempts to repair problems introduced by the bad merge
5491fd1098.  The easiest way for me
to fix the badly-merged gnulib files was to run
'admin/merge-gnulib', so I did that, which also imported the
following changes:
* build-aux/update-copyright, m4/gnulib.m4:
Update from gnulib, incorporating:
2015-01-15 time: port to MinGW32 3.21
2015-01-15 update-copyright: apply to self
2015-01-11 update-copyright: recognize groff's \(co marker
2015-01-27 22:24:47 -08:00

54 lines
2.0 KiB
C

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