diff options
Diffstat (limited to '')
-rw-r--r-- | lib/binary-io.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/lib/binary-io.h b/lib/binary-io.h new file mode 100644 index 0000000..855d6f8 --- /dev/null +++ b/lib/binary-io.h @@ -0,0 +1,79 @@ +/* Binary mode I/O. + Copyright (C) 2001, 2003, 2005, 2008-2023 Free Software Foundation, Inc. + + This file is free software: you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + This file 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 Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. */ + +#ifndef _BINARY_H +#define _BINARY_H + +/* This file uses _GL_INLINE_HEADER_BEGIN, _GL_INLINE, _GL_UNUSED. */ +#if !_GL_CONFIG_H_INCLUDED + #error "Please include config.h first." +#endif + +/* For systems that distinguish between text and binary I/O. + O_BINARY is guaranteed by the gnulib <fcntl.h>. */ +#include <fcntl.h> + +/* The MSVC7 <stdio.h> doesn't like to be included after '#define fileno ...', + so we include it here first. */ +#include <stdio.h> + +_GL_INLINE_HEADER_BEGIN +#ifndef BINARY_IO_INLINE +# define BINARY_IO_INLINE _GL_INLINE +#endif + +#if O_BINARY +# if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__ +# include <io.h> /* declares setmode() */ +# define __gl_setmode setmode +# else +# define __gl_setmode _setmode +# undef fileno +# define fileno _fileno +# endif +#else + /* On reasonable systems, binary I/O is the only choice. */ + /* Use a function rather than a macro, to avoid gcc warnings + "warning: statement with no effect". */ +BINARY_IO_INLINE int +__gl_setmode (_GL_UNUSED int fd, _GL_UNUSED int mode) +{ + return O_BINARY; +} +#endif + +/* Set FD's mode to MODE, which should be either O_TEXT or O_BINARY. + Return the old mode if successful, -1 (setting errno) on failure. + Ordinarily this function would be called 'setmode', since that is + its old name on MS-Windows, but it is called 'set_binary_mode' here + to avoid colliding with a BSD function of another name. */ + +#if defined __DJGPP__ || defined __EMX__ +extern int set_binary_mode (int fd, int mode); +#else +BINARY_IO_INLINE int +set_binary_mode (int fd, int mode) +{ + return __gl_setmode (fd, mode); +} +#endif + +/* This macro is obsolescent. */ +#define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY)) + +_GL_INLINE_HEADER_END + +#endif /* _BINARY_H */ |