[bpt/guile.git] / lib / binary-io.h

/* Binary mode I/O.
   Copyright (C) 2001, 2003, 2005, 2008-2014 Free Software Foundation, Inc.

   This program 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 3 of the License, or
   (at your option) any later version.

   This program 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 <http://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

/* set_binary_mode (fd, mode)
   sets the binary/text I/O mode of file descriptor fd to the given mode
   (must be O_BINARY or O_TEXT) and returns the previous mode.  */
#if O_BINARY
# if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__
#  include <io.h> /* declares setmode() */
#  define set_binary_mode setmode
# else
#  define set_binary_mode _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
set_binary_mode (int fd, int mode)
{
  (void) fd;
  (void) mode;
  return O_BINARY;
}
#endif

/* SET_BINARY (fd);
   changes the file descriptor fd to perform binary I/O.  */
#ifdef __DJGPP__
# include <unistd.h> /* declares isatty() */
  /* Avoid putting stdin/stdout in binary mode if it is connected to
     the console, because that would make it impossible for the user
     to interrupt the program through Ctrl-C or Ctrl-Break.  */
# define SET_BINARY(fd) ((void) (!isatty (fd) ? (set_binary_mode (fd, O_BINARY), 0) : 0))
#else
# define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY))
#endif

_GL_INLINE_HEADER_END

#endif /* _BINARY_H */
Commit	Line	Data
3d458a81	1	/* Binary mode I/O.
5e69ceb7	2	Copyright (C) 2001, 2003, 2005, 2008-2014 Free Software Foundation, Inc.
3d458a81 AW	3
	4	This program is free software: you can redistribute it and/or modify
	5	it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
	13
	14	You should have received a copy of the GNU Lesser 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
5e69ceb7 MW	28	#ifndef _GL_INLINE_HEADER_BEGIN
	29	#error "Please include config.h first."
	30	#endif
7ae4e75a LC	31	_GL_INLINE_HEADER_BEGIN
	32	#ifndef BINARY_IO_INLINE
	33	# define BINARY_IO_INLINE _GL_INLINE
	34	#endif
	35
005de2e8 LC	36	/* set_binary_mode (fd, mode)
	37	sets the binary/text I/O mode of file descriptor fd to the given mode
	38	(must be O_BINARY or O_TEXT) and returns the previous mode. */
3d458a81 AW	39	#if O_BINARY
	40	# if defined __EMX__ \|\| defined __DJGPP__ \|\| defined __CYGWIN__
	41	# include <io.h> /* declares setmode() */
005de2e8	42	# define set_binary_mode setmode
3d458a81	43	# else
005de2e8	44	# define set_binary_mode _setmode
3d458a81 AW	45	# undef fileno
	46	# define fileno _fileno
	47	# endif
3d458a81	48	#else
005de2e8	49	/* On reasonable systems, binary I/O is the only choice. */
7ae4e75a	50	/* Use a function rather than a macro, to avoid gcc warnings
005de2e8	51	"warning: statement with no effect". */
7ae4e75a	52	BINARY_IO_INLINE int
005de2e8 LC	53	set_binary_mode (int fd, int mode)
	54	{
	55	(void) fd;
	56	(void) mode;
	57	return O_BINARY;
	58	}
	59	#endif
	60
	61	/* SET_BINARY (fd);
	62	changes the file descriptor fd to perform binary I/O. */
	63	#ifdef __DJGPP__
	64	# include <unistd.h> /* declares isatty() */
	65	/* Avoid putting stdin/stdout in binary mode if it is connected to
	66	the console, because that would make it impossible for the user
	67	to interrupt the program through Ctrl-C or Ctrl-Break. */
	68	# define SET_BINARY(fd) ((void) (!isatty (fd) ? (set_binary_mode (fd, O_BINARY), 0) : 0))
	69	#else
	70	# define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY))
3d458a81 AW	71	#endif
3d458a81 AW	72
7ae4e75a LC	73	_GL_INLINE_HEADER_END
7ae4e75a LC	74
3d458a81	75	#endif /* _BINARY_H */