78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
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/* Binary mode I/O.
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Copyright (C) 2001, 2003, 2005, 2008-2022 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifndef _BINARY_H
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#define _BINARY_H
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/* For systems that distinguish between text and binary I/O.
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O_BINARY is guaranteed by the gnulib <fcntl.h>. */
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#include <fcntl.h>
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/* The MSVC7 <stdio.h> doesn't like to be included after '#define fileno ...',
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so we include it here first. */
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#include <stdio.h>
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#ifndef _GL_INLINE_HEADER_BEGIN
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#error "Please include config.h first."
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#endif
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_GL_INLINE_HEADER_BEGIN
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#ifndef BINARY_IO_INLINE
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# define BINARY_IO_INLINE _GL_INLINE
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#endif
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#if O_BINARY
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# if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__
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# include <io.h> /* declares setmode() */
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# define __gl_setmode setmode
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# else
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# define __gl_setmode _setmode
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# undef fileno
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# define fileno _fileno
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# endif
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#else
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/* On reasonable systems, binary I/O is the only choice. */
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/* Use a function rather than a macro, to avoid gcc warnings
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"warning: statement with no effect". */
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BINARY_IO_INLINE int
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__gl_setmode (_GL_UNUSED int fd, _GL_UNUSED int mode)
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{
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return O_BINARY;
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}
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#endif
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/* Set FD's mode to MODE, which should be either O_TEXT or O_BINARY.
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Return the old mode if successful, -1 (setting errno) on failure.
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Ordinarily this function would be called 'setmode', since that is
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its old name on MS-Windows, but it is called 'set_binary_mode' here
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to avoid colliding with a BSD function of another name. */
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#if defined __DJGPP__ || defined __EMX__
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extern int set_binary_mode (int fd, int mode);
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#else
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BINARY_IO_INLINE int
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set_binary_mode (int fd, int mode)
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{
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return __gl_setmode (fd, mode);
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}
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#endif
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/* This macro is obsolescent. */
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#define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY))
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_GL_INLINE_HEADER_END
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#endif /* _BINARY_H */
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