| 1 | /* Binary mode I/O.
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| 2 | Copyright (C) 2001, 2003, 2005, 2008-2022 Free Software Foundation, Inc.
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| 3 |
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| 4 | This file is free software: you can redistribute it and/or modify
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| 5 | it under the terms of the GNU Lesser General Public License as
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| 6 | published by the Free Software Foundation; either version 2.1 of the
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| 7 | License, or (at your option) any later version.
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| 8 |
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| 9 | This file is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU Lesser General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU Lesser General Public License
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| 15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | #ifndef _BINARY_H
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| 18 | #define _BINARY_H
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| 19 |
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| 20 | /* For systems that distinguish between text and binary I/O.
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| 21 | O_BINARY is guaranteed by the gnulib <fcntl.h>. */
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| 22 | #include <fcntl.h>
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| 23 |
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| 24 | /* The MSVC7 <stdio.h> doesn't like to be included after '#define fileno ...',
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| 25 | so we include it here first. */
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| 26 | #include <stdio.h>
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| 27 |
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| 28 | #ifndef _GL_INLINE_HEADER_BEGIN
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| 29 | #error "Please include config.h first."
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| 30 | #endif
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| 31 | _GL_INLINE_HEADER_BEGIN
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| 32 | #ifndef BINARY_IO_INLINE
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| 33 | # define BINARY_IO_INLINE _GL_INLINE
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| 34 | #endif
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| 35 |
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| 36 | #if O_BINARY
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| 37 | # if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__
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| 38 | # include <io.h> /* declares setmode() */
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| 39 | # define __gl_setmode setmode
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| 40 | # else
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| 41 | # define __gl_setmode _setmode
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| 42 | # undef fileno
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| 43 | # define fileno _fileno
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| 44 | # endif
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| 45 | #else
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| 46 | /* On reasonable systems, binary I/O is the only choice. */
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| 47 | /* Use a function rather than a macro, to avoid gcc warnings
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| 48 | "warning: statement with no effect". */
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| 49 | BINARY_IO_INLINE int
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| 50 | __gl_setmode (_GL_UNUSED int fd, _GL_UNUSED int mode)
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| 51 | {
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| 52 | return O_BINARY;
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| 53 | }
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| 54 | #endif
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| 55 |
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| 56 | /* Set FD's mode to MODE, which should be either O_TEXT or O_BINARY.
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| 57 | Return the old mode if successful, -1 (setting errno) on failure.
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| 58 | Ordinarily this function would be called 'setmode', since that is
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| 59 | its old name on MS-Windows, but it is called 'set_binary_mode' here
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| 60 | to avoid colliding with a BSD function of another name. */
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| 61 |
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| 62 | #if defined __DJGPP__ || defined __EMX__
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| 63 | extern int set_binary_mode (int fd, int mode);
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| 64 | #else
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| 65 | BINARY_IO_INLINE int
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| 66 | set_binary_mode (int fd, int mode)
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| 67 | {
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| 68 | return __gl_setmode (fd, mode);
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| 69 | }
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| 70 | #endif
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| 71 |
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| 72 | /* This macro is obsolescent. */
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| 73 | #define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY))
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| 74 |
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| 75 | _GL_INLINE_HEADER_END
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| 76 |
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| 77 | #endif /* _BINARY_H */
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