/Src/Dependencies/Boost/boost/iostreams/flush.hpp

http://hadesmem.googlecode.com/ · C++ Header · 125 lines · 90 code · 27 blank · 8 comment · 3 complexity · 53d2b6d9d299ae46a6fea829ad3b1f1d MD5 · raw file 

    

  1. // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
    2. 

  2. // (C) Copyright 2003-2007 Jonathan Turkanis
    3. 

  3. // Distributed under the Boost Software License, Version 1.0. (See accompanying
    4. 

  4. // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
    5. 

  5. 

  6. // See http://www.boost.org/libs/iostreams for documentation.
    7. 

  7. 

  8. #ifndef BOOST_IOSTREAMS_FLUSH_HPP_INCLUDED
    9. 

  9. #define BOOST_IOSTREAMS_FLUSH_HPP_INCLUDED
    10. 

  10. 

  11. #if defined(_MSC_VER) && (_MSC_VER >= 1020)
    12. 

  12. # pragma once
    13. 

  13. #endif
    14. 

  14. 

  15. #include <boost/config.hpp>  // DEDUCED_TYPENAME, MSVC.
    16. 

  16. #include <boost/detail/workaround.hpp>
    17. 

  17. #include <boost/iostreams/detail/dispatch.hpp>
    18. 

  18. #include <boost/iostreams/detail/streambuf.hpp>
    19. 

  19. #include <boost/iostreams/detail/wrap_unwrap.hpp>
    20. 

  20. #include <boost/iostreams/operations_fwd.hpp>
    21. 

  21. #include <boost/iostreams/traits.hpp>
    22. 

  22. #include <boost/mpl/if.hpp>
    23. 

  23. 

  24. // Must come last.
    25. 

  25. #include <boost/iostreams/detail/config/disable_warnings.hpp>
    26. 

  26. 

  27. namespace boost { namespace iostreams {
    28. 

  28. 

  29. namespace detail {
    30. 

  30. 

  31. template<typename T>
    32. 

  32. struct flush_device_impl;
    33. 

  33. 

  34. template<typename T>
    35. 

  35. struct flush_filter_impl;
    36. 

  36. 

  37. } // End namespace detail.
    38. 

  38. 

  39. template<typename T>
    40. 

  40. bool flush(T& t)
    41. 

  41. { return detail::flush_device_impl<T>::flush(detail::unwrap(t)); }
    42. 

  42. 

  43. template<typename T, typename Sink>
    44. 

  44. bool flush(T& t, Sink& snk)
    45. 

  45. { return detail::flush_filter_impl<T>::flush(detail::unwrap(t), snk); }
    46. 

  46. 

  47. namespace detail {
    48. 

  48. 

  49. //------------------Definition of flush_device_impl---------------------------//
    50. 

  50. 

  51. template<typename T>
    52. 

  52. struct flush_device_impl
    53. 

  53.     : mpl::if_<
    54. 

  54.           is_custom<T>,
    55. 

  55.           operations<T>,
    56. 

  56.           flush_device_impl<
    57. 

  57.               BOOST_DEDUCED_TYPENAME
    58. 

  58.               dispatch<
    59. 

  59.                   T, ostream_tag, streambuf_tag, flushable_tag, any_tag
    60. 

  60.               >::type
    61. 

  61.           >
    62. 

  62.       >::type
    63. 

  63.     { };
    64. 

  64. 

  65. template<>
    66. 

  66. struct flush_device_impl<ostream_tag> {
    67. 

  67.     template<typename T>
    68. 

  68.     static bool flush(T& t)
    69. 

  69.     { return t.rdbuf()->BOOST_IOSTREAMS_PUBSYNC() == 0; }
    70. 

  70. };
    71. 

  71. 

  72. template<>
    73. 

  73. struct flush_device_impl<streambuf_tag> {
    74. 

  74.     template<typename T>
    75. 

  75.     static bool flush(T& t)
    76. 

  76.     { return t.BOOST_IOSTREAMS_PUBSYNC() == 0; }
    77. 

  77. };
    78. 

  78. 

  79. template<>
    80. 

  80. struct flush_device_impl<flushable_tag> {
    81. 

  81.     template<typename T>
    82. 

  82.     static bool flush(T& t) { return t.flush(); }
    83. 

  83. };
    84. 

  84. 

  85. template<>
    86. 

  86. struct flush_device_impl<any_tag> {
    87. 

  87.     template<typename T>
    88. 

  88.     static bool flush(T&) { return true; }
    89. 

  89. };
    90. 

  90. 

  91. //------------------Definition of flush_filter_impl---------------------------//
    92. 

  92. 

  93. template<typename T>
    94. 

  94. struct flush_filter_impl
    95. 

  95.     : mpl::if_<
    96. 

  96.           is_custom<T>,
    97. 

  97.           operations<T>,
    98. 

  98.           flush_filter_impl<
    99. 

  99.               BOOST_DEDUCED_TYPENAME
    100. 

  100.               dispatch<
    101. 

  101.                   T, flushable_tag, any_tag
    102. 

  102.               >::type
    103. 

  103.           >
    104. 

  104.       >::type
    105. 

  105.     { };
    106. 

  106. 

  107. template<>
    108. 

  108. struct flush_filter_impl<flushable_tag> {
    109. 

  109.     template<typename T, typename Sink>
    110. 

  110.     static bool flush(T& t, Sink& snk) { return t.flush(snk); }
    111. 

  111. };
    112. 

  112. 

  113. template<>
    114. 

  114. struct flush_filter_impl<any_tag> {
    115. 

  115.     template<typename T, typename Sink>
    116. 

  116.     static bool flush(T&, Sink&) { return false; }
    117. 

  117. };
    118. 

  118. 

  119. } // End namespace detail.
    120. 

  120. 

  121. } } // End namespaces iostreams, boost.
    122. 

  122. 

  123. #include <boost/iostreams/detail/config/enable_warnings.hpp>
    124. 

  124. 

  125. #endif // #ifndef BOOST_IOSTREAMS_FLUSH_HPP_INCLUDED
    126.