1 files changed, 77 insertions, 0 deletions
diff --git a/lib/binary-io.h b/lib/binary-io.h
new file mode 100644
index 0000000..5b7661e
--- /dev/null
+++ b/lib/binary-io.h
@@ -0,0 +1,77 @@
+/* Binary mode I/O.
+   Copyright (C) 2001, 2003, 2005, 2008-2022 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
+
+/* 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>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_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 */