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  1. /* Binary mode I/O.
  2.    Copyright (C) 2001, 2003, 2005, 2008 Free Software Foundation, Inc.
  3.  
  4.    This program is free software: you can redistribute it and/or modify
  5.    it under the terms of the GNU 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 General Public License for more details.
  13.  
  14.    You should have received a copy of the GNU 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. /* Include this header after <fcntl.h> and <stdio.h>, because
  21.    systems that distinguish between text and binary I/O usually
  22.    define O_BINARY in <fcntl.h>, and the MSVC7 <stdio.h> doesn't
  23.    like to be included after '#define fileno ...'
  24.  
  25.    We don't include <fcntl.h> here because not all systems have
  26.    that header.  */
  27.  
  28. #if !defined O_BINARY && defined _O_BINARY
  29.   /* For MSC-compatible compilers.  */
  30. # define O_BINARY _O_BINARY
  31. # define O_TEXT _O_TEXT
  32. #endif
  33. #ifdef __BEOS__
  34.   /* BeOS 5 has O_BINARY and O_TEXT, but they have no effect.  */
  35. # undef O_BINARY
  36. # undef O_TEXT
  37. #endif
  38. #if O_BINARY
  39. # if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__
  40. #  include <io.h> /* declares setmode() */
  41. # else
  42. #  define setmode _setmode
  43. # endif
  44. # ifdef __DJGPP__
  45. #  include <unistd.h> /* declares isatty() */
  46. #  /* Avoid putting stdin/stdout in binary mode if it is connected to the
  47. #     console, because that would make it impossible for the user to
  48. #     interrupt the program through Ctrl-C or Ctrl-Break.  */
  49. #  define SET_BINARY(fd) (!isatty (fd) ? (setmode (fd, O_BINARY), 0) : 0)
  50. # else
  51. #  define SET_BINARY(fd) setmode (fd, O_BINARY)
  52. # endif
  53. #else
  54.   /* On reasonable systems, binary I/O is the default.  */
  55. # undef O_BINARY
  56. # define O_BINARY 0
  57. # define SET_BINARY(fd) /* nothing */
  58. #endif
  59.  
  60. #endif /* _BINARY_H */
  61.