Added boost header

test/external/boost/iostreams/checked_operations.hpp

@@ -0,0 +1,158 @@
+// (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 <boost/iostreams/categories.hpp>
+#include <boost/iostreams/detail/dispatch.hpp>
+#include <boost/iostreams/detail/error.hpp>
+#include <boost/iostreams/detail/config/unreachable_return.hpp>
+#include <boost/iostreams/get.hpp>
+#include <boost/iostreams/put.hpp>
+#include <boost/iostreams/read.hpp>
+#include <boost/iostreams/seek.hpp>
+#include <boost/iostreams/traits.hpp>
+#include <boost/iostreams/write.hpp>
+#include <boost/throw_exception.hpp>
+
+// Must come last.
+#include <boost/iostreams/detail/config/disable_warnings.hpp>  // MSVC.
+
+namespace boost { namespace iostreams {
+
+namespace detail {
+
+template<typename T> 
+struct read_write_if_impl;
+
+template<typename T> 
+struct seek_if_impl;
+
+} // End namespace detail.
+
+template<typename T>
+typename int_type_of<T>::type get_if(T& t)
+{ 
+    typedef typename detail::dispatch<T, input, output>::type tag;
+    return detail::read_write_if_impl<tag>::get(t);
+}
+
+template<typename T>
+inline std::streamsize
+read_if(T& t, typename char_type_of<T>::type* s, std::streamsize n)
+{ 
+    typedef typename detail::dispatch<T, input, output>::type tag;
+    return detail::read_write_if_impl<tag>::read(t, s, n);
+}
+
+template<typename T>
+bool put_if(T& t, typename char_type_of<T>::type c)
+{ 
+    typedef typename detail::dispatch<T, output, input>::type tag;
+    return detail::read_write_if_impl<tag>::put(t, c);
+}
+
+template<typename T>
+inline std::streamsize write_if
+    (T& t, const typename char_type_of<T>::type* s, std::streamsize n)
+{ 
+    typedef typename detail::dispatch<T, output, input>::type tag;
+    return detail::read_write_if_impl<tag>::write(t, s, n);
+}
+
+template<typename T>
+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<T, random_access, any_tag>::type tag;
+    return seek_if_impl<tag>::seek(t, off, way, which);
+}
+
+namespace detail {
+
+//------------------Specializations of read_write_if_impl---------------------//
+
+template<>
+struct read_write_if_impl<input> {
+    template<typename T>
+    static typename int_type_of<T>::type get(T& t)
+    { return iostreams::get(t); }
+
+    template<typename T>
+    static std::streamsize
+    read(T& t, typename char_type_of<T>::type* s, std::streamsize n)
+    { return iostreams::read(t, s, n); }
+
+    template<typename T>
+    static bool put(T&, typename char_type_of<T>::type)
+    { boost::throw_exception(cant_write());
+      BOOST_IOSTREAMS_UNREACHABLE_RETURN(false) }
+
+    template<typename T>
+    static std::streamsize 
+    write(T&, const typename char_type_of<T>::type*, std::streamsize)
+    { boost::throw_exception(cant_write());
+      BOOST_IOSTREAMS_UNREACHABLE_RETURN(0) }
+};
+
+template<>
+struct read_write_if_impl<output> {
+    template<typename T>
+    static typename int_type_of<T>::type get(T&)
+    { boost::throw_exception(cant_read());
+      BOOST_IOSTREAMS_UNREACHABLE_RETURN(0) }
+
+    template<typename T>
+    static std::streamsize
+    read(T&, typename char_type_of<T>::type*, std::streamsize)
+    { boost::throw_exception(cant_read());
+      BOOST_IOSTREAMS_UNREACHABLE_RETURN(0) }
+
+    template<typename T>
+    static bool put(T& t, typename char_type_of<T>::type c)
+    { return iostreams::put(t, c); }
+
+    template<typename T>
+    static std::streamsize 
+    write( T& t, const typename char_type_of<T>::type* s, 
+           std::streamsize n )
+    { return iostreams::write(t, s, n); }
+};
+
+//------------------Specializations of seek_if_impl---------------------------//
+
+template<>
+struct seek_if_impl<random_access> {
+    template<typename T>
+    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<any_tag> {
+    template<typename T>
+    static std::streampos 
+    seek(T&, stream_offset, BOOST_IOS::seekdir, BOOST_IOS::openmode)
+    { boost::throw_exception(cant_seek());
+      BOOST_IOSTREAMS_UNREACHABLE_RETURN(std::streampos()) }
+};
+
+} // End namespace detail.
+
+} } // End namespaces iostreams, boost.
+
+#include <boost/iostreams/detail/config/enable_warnings.hpp>  // MSVC.
+
+#endif // #ifndef BOOST_IOSTREAMS_DETAIL_CHECKED_OPERATIONS_HPP_INCLUDED