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checked_operations.hpp - Hosted on DriveHQ Cloud IT Platform
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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\iostreams\checked_operations.hpp
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// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) // (C) Copyright 2005-2007 Jonathan Turkanis // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) // See http://www.boost.org/libs/iostreams for documentation. // Contains implementations of get, read, put, write and seek which // check a device's mode at runtime instead of compile time. #ifndef BOOST_IOSTREAMS_DETAIL_CHECKED_OPERATIONS_HPP_INCLUDED #define BOOST_IOSTREAMS_DETAIL_CHECKED_OPERATIONS_HPP_INCLUDED #include
#include
#include
#include
#include
#include
#include
#include
#include
// Must come last. #include
// MSVC. namespace boost { namespace iostreams { namespace detail { template
struct read_write_if_impl; template
struct seek_if_impl; } // End namespace detail. template
typename int_type_of
::type get_if(T& t) { typedef typename detail::dispatch
::type tag; return detail::read_write_if_impl
::get(t); } template
inline std::streamsize read_if(T& t, typename char_type_of
::type* s, std::streamsize n) { typedef typename detail::dispatch
::type tag; return detail::read_write_if_impl
::read(t, s, n); } template
bool put_if(T& t, typename char_type_of
::type c) { typedef typename detail::dispatch
::type tag; return detail::read_write_if_impl
::put(t, c); } template
inline std::streamsize write_if (T& t, const typename char_type_of
::type* s, std::streamsize n) { typedef typename detail::dispatch
::type tag; return detail::read_write_if_impl
::write(t, s, n); } template
inline std::streampos seek_if( T& t, stream_offset off, BOOST_IOS::seekdir way, BOOST_IOS::openmode which = BOOST_IOS::in | BOOST_IOS::out ) { using namespace detail; typedef typename dispatch
::type tag; return seek_if_impl
::seek(t, off, way, which); } namespace detail { //------------------Specializations of read_write_if_impl---------------------// template<> struct read_write_if_impl
{ template
static typename int_type_of
::type get(T& t) { return iostreams::get(t); } template
static std::streamsize read(T& t, typename char_type_of
::type* s, std::streamsize n) { return iostreams::read(t, s, n); } template
static bool put(T&, typename char_type_of
::type) { throw cant_write(); } template
static std::streamsize write(T&, const typename char_type_of
::type*, std::streamsize) { throw cant_write(); } }; template<> struct read_write_if_impl
{ template
static typename int_type_of
::type get(T&) { throw cant_read(); } template
static std::streamsize read(T&, typename char_type_of
::type*, std::streamsize) { throw cant_read(); } template
static bool put(T& t, typename char_type_of
::type c) { return iostreams::put(t, c); } template
static std::streamsize write( T& t, const typename char_type_of
::type* s, std::streamsize n ) { return iostreams::write(t, s, n); } }; //------------------Specializations of seek_if_impl---------------------------// template<> struct seek_if_impl
{ template
static std::streampos seek( T& t, stream_offset off, BOOST_IOS::seekdir way, BOOST_IOS::openmode which ) { return iostreams::seek(t, off, way, which); } }; template<> struct seek_if_impl
{ template
static std::streampos seek(T&, stream_offset, BOOST_IOS::seekdir, BOOST_IOS::openmode) { throw cant_seek(); } }; } // End namespace detail. } } // End namespaces iostreams, boost. #include
// MSVC. #endif // #ifndef BOOST_IOSTREAMS_DETAIL_CHECKED_OPERATIONS_HPP_INCLUDED
checked_operations.hpp
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