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7b154def PE |
1 | /* Binary mode I/O. |
2 | Copyright (C) 2001, 2003, 2005, 2008-2013 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 | /* For systems that distinguish between text and binary I/O. | |
21 | O_BINARY is guaranteed by the gnulib <fcntl.h>. */ | |
22 | #include <fcntl.h> | |
23 | ||
24 | /* The MSVC7 <stdio.h> doesn't like to be included after '#define fileno ...', | |
25 | so we include it here first. */ | |
26 | #include <stdio.h> | |
27 | ||
28 | _GL_INLINE_HEADER_BEGIN | |
29 | #ifndef BINARY_IO_INLINE | |
30 | # define BINARY_IO_INLINE _GL_INLINE | |
31 | #endif | |
32 | ||
33 | /* set_binary_mode (fd, mode) | |
34 | sets the binary/text I/O mode of file descriptor fd to the given mode | |
35 | (must be O_BINARY or O_TEXT) and returns the previous mode. */ | |
36 | #if O_BINARY | |
37 | # if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__ | |
38 | # include <io.h> /* declares setmode() */ | |
39 | # define set_binary_mode setmode | |
40 | # else | |
41 | # define set_binary_mode _setmode | |
42 | # undef fileno | |
43 | # define fileno _fileno | |
44 | # endif | |
45 | #else | |
46 | /* On reasonable systems, binary I/O is the only choice. */ | |
47 | /* Use a function rather than a macro, to avoid gcc warnings | |
48 | "warning: statement with no effect". */ | |
49 | BINARY_IO_INLINE int | |
50 | set_binary_mode (int fd, int mode) | |
51 | { | |
52 | (void) fd; | |
53 | (void) mode; | |
54 | return O_BINARY; | |
55 | } | |
56 | #endif | |
57 | ||
58 | /* SET_BINARY (fd); | |
59 | changes the file descriptor fd to perform binary I/O. */ | |
60 | #ifdef __DJGPP__ | |
61 | # include <unistd.h> /* declares isatty() */ | |
62 | /* Avoid putting stdin/stdout in binary mode if it is connected to | |
63 | the console, because that would make it impossible for the user | |
64 | to interrupt the program through Ctrl-C or Ctrl-Break. */ | |
65 | # define SET_BINARY(fd) ((void) (!isatty (fd) ? (set_binary_mode (fd, O_BINARY), 0) : 0)) | |
66 | #else | |
67 | # define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY)) | |
68 | #endif | |
69 | ||
70 | _GL_INLINE_HEADER_END | |
71 | ||
72 | #endif /* _BINARY_H */ |