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mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-04 08:47:11 +00:00
emacs/lib/dosname.h
Paul Eggert 5a59e28dec Merge from gnulib
This incorporates:
2016-12-19 stdint: Fix WINT_MAX to match wint_t on mingw
2016-12-18 getopt: Fix link error for users of getopt() in <unistd.h>
2016-12-17 getlogin: Port to newer mingw
2016-12-17 stdint: Fix WINT_MAX to match wint_t on MSVC
2016-12-17 Avoid redefinition errors on MSVC
* lib/getopt.in.h, lib/stdint.in.h, lib/stdio.in.h, lib/unistd.in.h:
* m4/stdint.m4, m4/unistd_h.m4:
Copy from gnulib.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
Plus, this commit updates the indenting on copyright notices to
match that of gnulib.
2017-01-01 01:32:56 -08:00

54 lines
2.0 KiB
C

/* File names on MS-DOS/Windows systems.
Copyright (C) 2000-2001, 2004-2006, 2009-2017 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_ */