1 /* Binary mode I/O.
2    Copyright (C) 2001-2016 Free Software Foundation, Inc.
3 
4    This program is free software: you can redistribute it and/or modify
5    it under the terms of the GNU General Public License as published by
6    the Free Software Foundation; either version 3 of the License, or
7    (at your option) any later version.
8 
9    This program is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12    GNU General Public License for more details.
13 
14    You should have received a copy of the GNU General Public License
15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
16 
17 #ifndef _BINARY_H
18 #define _BINARY_H
19 
20 /* Include this header after <fcntl.h> and <stdio.h>, because
21    systems that distinguish between text and binary I/O usually
22    define O_BINARY in <fcntl.h>, and the MSVC7 <stdio.h> doesn't
23    like to be included after '#define fileno ...'
24 
25    We don't include <fcntl.h> here because not all systems have
26    that header.  */
27 
28 #if !defined O_BINARY && defined _O_BINARY
29   /* For MSC-compatible compilers.  */
30 # define O_BINARY _O_BINARY
31 # define O_TEXT _O_TEXT
32 #endif
33 #ifdef __BEOS__
34   /* BeOS 5 has O_BINARY and O_TEXT, but they have no effect.  */
35 # undef O_BINARY
36 # undef O_TEXT
37 #endif
38 #if O_BINARY
39 # if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__
40 #  include <io.h> /* declares setmode() */
41 # else
42 #  define setmode _setmode
43 #  undef fileno
44 #  define fileno _fileno
45 # endif
46 # ifdef __DJGPP__
47 #  include <unistd.h> /* declares isatty() */
48 #  /* Avoid putting stdin/stdout in binary mode if it is connected to the
49 #     console, because that would make it impossible for the user to
50 #     interrupt the program through Ctrl-C or Ctrl-Break.  */
51 #  define SET_BINARY(fd) (!isatty (fd) ? (setmode (fd, O_BINARY), 0) : 0)
52 # else
53 #  define SET_BINARY(fd) setmode (fd, O_BINARY)
54 # endif
55 #else
56   /* On reasonable systems, binary I/O is the default.  */
57 # undef O_BINARY
58 # define O_BINARY 0
59 # define SET_BINARY(fd) /* nothing */
60 #endif
61 
62 #endif /* _BINARY_H */
63