BVB Source Codes

mars Show seek.hpp Source code

Return Download mars: download seek.hpp Source code - Download mars Source code - Type:.hpp
  1. // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
  2. // (C) Copyright 2003-2007 Jonathan Turkanis
  3. // Distributed under the Boost Software License, Version 1.0. (See accompanying
  4. // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
  5.  
  6. // See http://www.boost.org/libs/iostreams for documentation.
  7.  
  8. #ifndef BOOST_IOSTREAMS_SEEK_HPP_INCLUDED
  9. #define BOOST_IOSTREAMS_SEEK_HPP_INCLUDED
  10.  
  11. #if defined(_MSC_VER) && (_MSC_VER >= 1020)
  12. # pragma once
  13. #endif
  14.  
  15. #include <boost/config.hpp>  // DEDUCED_TYPENAME, MSVC.
  16. #include <boost/integer_traits.hpp>
  17. #include <boost/iostreams/categories.hpp>
  18. #include <boost/iostreams/detail/dispatch.hpp>
  19. #include <boost/iostreams/detail/ios.hpp>       // streamsize, seekdir, openmode.
  20. #include <boost/iostreams/detail/streambuf.hpp>
  21. #include <boost/iostreams/detail/wrap_unwrap.hpp>
  22. #include <boost/iostreams/operations_fwd.hpp>
  23. #include <boost/iostreams/positioning.hpp>
  24. #include <boost/mpl/if.hpp>
  25.  
  26. // Must come last.
  27. #include <boost/iostreams/detail/config/disable_warnings.hpp>
  28.  
  29. namespace mars_boost {} namespace boost = mars_boost; namespace mars_boost { namespace iostreams {
  30.  
  31. namespace detail {
  32.  
  33. template<typename T>
  34. struct seek_device_impl;
  35.  
  36. template<typename T>
  37. struct seek_filter_impl;
  38.  
  39. } // End namespace detail.
  40.  
  41. template<typename T>
  42. inline std::streampos
  43. seek( T& t, stream_offset off, BOOST_IOS::seekdir way,
  44.       BOOST_IOS::openmode which = BOOST_IOS::in | BOOST_IOS::out )
  45. {
  46.     using namespace detail;
  47.     return seek_device_impl<T>::seek(detail::unwrap(t), off, way, which);
  48. }
  49.  
  50. template<typename T, typename Device>
  51. inline std::streampos
  52. seek( T& t, Device& dev, stream_offset off, BOOST_IOS::seekdir way,
  53.       BOOST_IOS::openmode which = BOOST_IOS::in | BOOST_IOS::out )
  54. {
  55.     using namespace detail;
  56.     return seek_filter_impl<T>::seek(detail::unwrap(t), dev, off, way, which);
  57. }
  58.  
  59. namespace detail {
  60.  
  61. //------------------Definition of seek_device_impl----------------------------//
  62.  
  63. template<typename T>
  64. struct seek_device_impl
  65.     : mpl::if_<
  66.           is_custom<T>,
  67.           operations<T>,
  68.           seek_device_impl<
  69.               BOOST_DEDUCED_TYPENAME
  70.               dispatch<
  71.                   T, iostream_tag, istream_tag, ostream_tag,
  72.                   streambuf_tag, two_head, any_tag
  73.               >::type
  74.           >
  75.       >::type
  76.     { };
  77.  
  78. struct seek_impl_basic_ios {
  79.     template<typename T>
  80.     static std::streampos seek( T& t, stream_offset off,
  81.                                 BOOST_IOS::seekdir way,
  82.                                 BOOST_IOS::openmode which )
  83.     {
  84.         if ( way == BOOST_IOS::beg &&
  85.              ( off < integer_traits<std::streamoff>::const_min ||
  86.                off > integer_traits<std::streamoff>::const_max ) )
  87.         {
  88.             return t.rdbuf()->pubseekpos(offset_to_position(off));
  89.         } else {
  90.             return t.rdbuf()->pubseekoff(off, way, which);
  91.         }
  92.     }
  93. };
  94.  
  95. template<>
  96. struct seek_device_impl<iostream_tag> : seek_impl_basic_ios { };
  97.  
  98. template<>
  99. struct seek_device_impl<istream_tag> : seek_impl_basic_ios { };
  100.  
  101. template<>
  102. struct seek_device_impl<ostream_tag> : seek_impl_basic_ios { };
  103.  
  104. template<>
  105. struct seek_device_impl<streambuf_tag> {
  106.     template<typename T>
  107.     static std::streampos seek( T& t, stream_offset off,
  108.                                 BOOST_IOS::seekdir way,
  109.                                 BOOST_IOS::openmode which )
  110.     {
  111.         if ( way == BOOST_IOS::beg &&
  112.              ( off < integer_traits<std::streamoff>::const_min ||
  113.                off > integer_traits<std::streamoff>::const_max ) )
  114.         {
  115.             return t.BOOST_IOSTREAMS_PUBSEEKPOS(offset_to_position(off));
  116.         } else {
  117.             return t.BOOST_IOSTREAMS_PUBSEEKOFF(off, way, which);
  118.         }
  119.     }
  120. };
  121.  
  122. template<>
  123. struct seek_device_impl<two_head> {
  124.     template<typename T>
  125.     static std::streampos seek( T& t, stream_offset off,
  126.                                 BOOST_IOS::seekdir way,
  127.                                 BOOST_IOS::openmode which )
  128.     { return t.seek(off, way, which); }
  129. };
  130.  
  131. template<>
  132. struct seek_device_impl<any_tag> {
  133.     template<typename T>
  134.     static std::streampos seek( T& t, stream_offset off,
  135.                                 BOOST_IOS::seekdir way,
  136.                                 BOOST_IOS::openmode )
  137.     { return t.seek(off, way); }
  138. };
  139.  
  140. //------------------Definition of seek_filter_impl----------------------------//
  141.  
  142. template<typename T>
  143. struct seek_filter_impl
  144.     : mpl::if_<
  145.           is_custom<T>,
  146.           operations<T>,
  147.           seek_filter_impl<
  148.               BOOST_DEDUCED_TYPENAME
  149.               dispatch<T, two_head, any_tag>::type
  150.           >
  151.       >::type
  152.     { };
  153.  
  154. template<>
  155. struct seek_filter_impl<two_head> {
  156.     template<typename T, typename Device>
  157.     static std::streampos seek( T& t, Device& d,
  158.                                 stream_offset off,
  159.                                 BOOST_IOS::seekdir way,
  160.                                 BOOST_IOS::openmode which )
  161.     { return t.seek(d, off, way, which); }
  162. };
  163.  
  164. template<>
  165. struct seek_filter_impl<any_tag> {
  166.     template<typename T, typename Device>
  167.     static std::streampos seek( T& t, Device& d,
  168.                                 stream_offset off,
  169.                                 BOOST_IOS::seekdir way,
  170.                                 BOOST_IOS::openmode )
  171.     { return t.seek(d, off, way); }
  172. };
  173.  
  174. } // End namespace detail.
  175.  
  176. } } // End namespaces iostreams, boost.
  177.  
  178. #include <boost/iostreams/detail/config/enable_warnings.hpp>
  179.  
  180. #endif // #ifndef BOOST_IOSTREAMS_SEEK_HPP_INCLUDED
  181.  
downloadseek.hpp Source code - Download mars Source code
Related Source Codes/Software:
Hero - Elegant transition library for iOS & tvOS 2017-06-09
deep-photo-styletransfer - Code and data for paper "Deep Photo Style Transfer... 2017-06-09
mastodon - A GNU Social-compatible microblogging server ... 2017-06-09
plyr - A simple HTML5, YouTube and Vimeo player ... 2017-06-08
prepack - Prepack is a partial evaluator for JavaScript. Pre... 2017-06-08
Public-APIs - 2017-06-09
lottie-ios - An iOS library to natively render After Effects ve... 2017-06-09
Awesome-Hacking - A collection of various awesome lists for hackers,... 2017-06-09
algorithms - Minimal examples of data structures and algorithms... 2017-06-10
lectures - Oxford Deep NLP 2017 course 2017-06-10
CRYENGINE - CRYENGINE is a powerful real-time game development... 2017-06-11
postal - 2017-06-11
reactide - Reactide is the first dedicated IDE for React web ... 2017-06-11
rkt - rkt is a pod-native container engine for Linux. It... 2017-06-11
uWebSockets - Tiny WebSockets https://for... 2017-06-11
realworld - TodoMVC for the RealWorld - Exemplary fullstack Me... 2017-06-11
goreplay - GoReplay is an open-source tool for capturing and ... 2017-06-10
pyenv - Simple Python version management 2017-06-10
redux-saga - An alternative side effect model for Redux apps ... 2017-06-10
angular-starter - 2017-06-10

 Back to top