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renamed restrict
[SVN r29202]
This commit is contained in:
Jonathan Turkanis
@@ -1,384 +0,0 @@
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// (C) Copyright Jonathan Turkanis 2005.
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
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// See http://www.boost.org/libs/iostreams for documentation.
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#ifndef BOOST_IOSTREAMS_OFFSET_HPP_INCLUDED
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#define BOOST_IOSTREAMS_OFFSET_HPP_INCLUDED
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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# pragma once
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#endif
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#include <algorithm> // min.
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#include <utility> // pair.
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#include <boost/cstdint.hpp> // intmax_t.
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#include <boost/config.hpp> // DEDUCED_TYPENAME.
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#include <boost/iostreams/categories.hpp>
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#include <boost/iostreams/char_traits.hpp>
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#include <boost/iostreams/detail/adapter/basic_adapter.hpp>
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#include <boost/iostreams/detail/call_traits.hpp>
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#include <boost/iostreams/detail/enable_if_stream.hpp>
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#include <boost/iostreams/detail/error.hpp>
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#include <boost/iostreams/detail/ios.hpp> // failure.
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#include <boost/iostreams/detail/select.hpp>
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#include <boost/iostreams/operations.hpp>
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#include <boost/iostreams/skip.hpp>
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#include <boost/iostreams/traits.hpp> // mode_of, is_direct.
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#include <boost/mpl/bool.hpp>
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#include <boost/static_assert.hpp>
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#include <boost/type_traits/is_convertible.hpp>
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#include <boost/iostreams/detail/config/disable_warnings.hpp> // VC7.1 C4244.
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namespace boost { namespace iostreams {
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namespace detail {
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//
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// Template name: offset_indirect_device.
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// Description: Provides an offset view of an indirect Device.
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// Template paramters:
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// Device - An indirect model of Device that models either Source or
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// SeekableDevice.
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//
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template<typename Device>
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class offset_indirect_device : public basic_adapter<Device> {
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private:
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typedef typename detail::param_type<Device>::type param_type;
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public:
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typedef typename char_type_of<Device>::type char_type;
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struct category
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: mode_of<Device>::type,
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device_tag,
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closable_tag,
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flushable_tag,
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localizable_tag,
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optimally_buffered_tag
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{ };
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offset_indirect_device( param_type dev, stream_offset off,
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stream_offset len );
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std::streamsize read(char_type* s, std::streamsize n);
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std::streamsize write(const char_type* s, std::streamsize n);
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stream_offset seek(stream_offset off, BOOST_IOS::seekdir way);
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private:
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stream_offset beg_, pos_, end_;
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};
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//
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// Template name: offset_direct_device.
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// Description: Provides an offset view of a Direct Device.
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// Template paramters:
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// Device - A model of Direct and Device.
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//
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template<typename Device>
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class offset_direct_device : public basic_adapter<Device> {
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public:
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typedef typename char_type_of<Device>::type char_type;
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typedef std::pair<char_type*, char_type*> pair_type;
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struct category
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: mode_of<Device>::type,
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device_tag,
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direct_tag,
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closable_tag,
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localizable_tag
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{ };
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offset_direct_device( const Device& dev, stream_offset off,
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stream_offset len );
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pair_type input_sequence();
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pair_type output_sequence();
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private:
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pair_type sequence(mpl::true_);
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pair_type sequence(mpl::false_);
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char_type *beg_, *end_;
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};
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//
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// Template name: offset_filter.
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// Description: Provides an offset view of a Filter.
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// Template paramters:
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// Filter - An indirect model of Filter.
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//
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template<typename Filter>
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class offset_filter : public basic_adapter<Filter> {
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public:
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typedef typename char_type_of<Filter>::type char_type;
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struct category
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: mode_of<Filter>::type,
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filter_tag,
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multichar_tag,
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closable_tag,
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localizable_tag,
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optimally_buffered_tag
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{ };
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offset_filter(const Filter& flt, stream_offset off, stream_offset len);
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template<typename Source>
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std::streamsize read(Source& src, char_type* s, std::streamsize n)
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{
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using namespace std;
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if (!open_)
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open(src);
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streamsize amt =
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(std::min) (n, static_cast<streamsize>(end_ - pos_));
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streamsize result = iostreams::read(this->component(), src, s, amt);
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if (result != -1)
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pos_ += result;
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return result;
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}
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template<typename Sink>
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std::streamsize write(Sink& snk, const char_type* s, std::streamsize n)
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{
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if (!open_)
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open(snk);
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if (pos_ + n >= end_)
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bad_write();
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std::streamsize result =
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iostreams::write(this->component(), snk, s, n);
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pos_ += result;
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return result;
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}
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template<typename Device>
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stream_offset seek(Device& dev, stream_offset off, BOOST_IOS::seekdir way)
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{
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stream_offset next;
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if (way == BOOST_IOS::beg) {
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next = beg_ + off;
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} else if (way == BOOST_IOS::cur) {
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next = pos_ + off;
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} else {
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next = end_ + off;
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}
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if (next < beg_ || next >= end_)
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bad_seek();
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pos_ = this->component().seek(dev, next, BOOST_IOS::cur);
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return pos_ - beg_;
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}
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private:
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template<typename Device>
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void open(Device& dev)
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{
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open_ = true;
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iostreams::skip(this->component(), dev, beg_);
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}
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stream_offset beg_, pos_, end_;
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bool open_;
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};
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template<typename T>
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struct offset_traits
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: iostreams::select< // Disambiguation for Tru64.
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is_filter<T>, offset_filter<T>,
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is_direct<T>, offset_direct_device<T>,
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else_, offset_indirect_device<T>
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>
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{ };
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} // End namespace detail.
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template<typename T>
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struct offset_view : public detail::offset_traits<T>::type {
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typedef typename detail::param_type<T>::type param_type;
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offset_view(param_type t, stream_offset off, stream_offset len)
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: detail::offset_traits<T>::type(t, off, len)
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{ }
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};
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//--------------Implementation of offset--------------------------------------//
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// Note: The following workarounds are patterned after resolve.hpp. It has not
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// yet been confirmed that they are necessary.
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#ifndef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION //-------------------------//
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# ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //-------------------------------//
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template<typename T>
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offset_view<T> offset( const T& t, stream_offset off, stream_offset len
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BOOST_IOSTREAMS_DISABLE_IF_STREAM(T) )
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{ return offset_view<T>(t, off, len); }
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template<typename Ch, typename Tr>
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offset_view< std::basic_streambuf<Ch, Tr> >
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offset(std::basic_streambuf<Ch, Tr>& sb)
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{ return offset_view< std::basic_streambuf<Ch, Tr> >(sb); }
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template<typename Ch, typename Tr>
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offset_view< std::basic_istream<Ch, Tr> >
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offset(std::basic_istream<Ch, Tr>& is)
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{ return offset_view< std::basic_istream<Ch, Tr> >(is); }
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template<typename Ch, typename Tr>
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offset_view< std::basic_ostream<Ch, Tr> >
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offset(std::basic_ostream<Ch, Tr>& os)
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{ return offset_view< std::basic_ostream<Ch, Tr> >(os); }
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template<typename Ch, typename Tr>
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offset_view< std::basic_iostream<Ch, Tr> >
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offset(std::basic_iostream<Ch, Tr>& io)
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{ return offset_view< std::basic_iostream<Ch, Tr> >(io); }
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# else // # ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //---------------------//
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template<typename T>
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offset_view<T> offset( const T& t, stream_offset off, stream_offset len
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BOOST_IOSTREAMS_DISABLE_IF_STREAM(T) )
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{ return offset_view<T>(t, off, len); }
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offset_view<std::streambuf> offset(std::streambuf& sb)
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{ return offset_view<std::streambuf>(sb); }
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offset_view<std::istream> offset(std::istream<Ch, Tr>& is)
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{ return offset_view<std::istream>(is); }
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offset_view<std::ostream> offset(std::ostream<Ch, Tr>& os)
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{ return offset_view<std::ostream>(os); }
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offset_view<std::iostream> offset(std::iostream<Ch, Tr>& io)
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{ return offset_view<std::iostream>(io); }
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# endif // # ifndef BOOST_IOSTREAMS_NO_STREAM_TEMPLATES //--------------------//
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#else // #ifndef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION //----------------//
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template<typename T>
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offset_view<T> offset(const T& t, mpl::true_)
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{ // Bad overload resolution.
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return offset_view<T>(const_cast<T&>(t));
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}
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template<typename Mode, typename Ch, typename T>
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offset_view<T> offset(const T& t, mpl::false_)
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{ return offset_view<T>(t); }
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template<typename T>
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offset_view<T> offset(const T& t BOOST_IOSTREAMS_DISABLE_IF_STREAM(T))
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{ return offset(t, is_std_io<T>()); }
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# if !BOOST_WORKAROUND(__BORLANDC__, < 0x600) && \
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!BOOST_WORKAROUND(BOOST_MSVC, <= 1300) && \
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!defined(__GNUC__) // ---------------------------------------------------//
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template<typename T>
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offset_view<T> offset(T& t) { return offset_view<T>(t); }
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# endif // Borland 5.x, VC6-7.0 or GCC 2.9x //--------------------------------//
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#endif // #ifndef BOOST_IOSTREAMS_BROKEN_OVERLOAD_RESOLUTION //---------------//
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//----------------------------------------------------------------------------//
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namespace detail {
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//--------------Implementation of offset_indirect_device----------------------//
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template<typename Device>
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offset_indirect_device<Device>::offset_indirect_device
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(param_type dev, stream_offset off, stream_offset len)
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: basic_adapter<Device>(dev), beg_(off), pos_(off), end_(off + len)
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{
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if (len < 0 || off < 0)
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throw BOOST_IOSTREAMS_FAILURE("bad offset");
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iostreams::skip(this->component(), off);
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}
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template<typename Device>
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inline std::streamsize offset_indirect_device<Device>::read
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(char_type* s, std::streamsize n)
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{
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using namespace std;
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streamsize amt =
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(std::min) (n, static_cast<streamsize>(end_ - pos_));
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streamsize result = iostreams::read(this->component(), s, amt);
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if (result != -1)
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pos_ += result;
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return result;
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}
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template<typename Device>
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inline std::streamsize offset_indirect_device<Device>::write
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(const char_type* s, std::streamsize n)
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{
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if (pos_ + n >= end_)
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bad_write();
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streamsize result = iostreams::write(this->component(), s, n);
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pos_ += result;
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return result;
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}
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template<typename Device>
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stream_offset offset_indirect_device<Device>::seek
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(stream_offset off, BOOST_IOS::seekdir way)
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{
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stream_offset next;
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if (way == BOOST_IOS::beg) {
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next = beg_ + off;
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} else if (way == BOOST_IOS::cur) {
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next = pos_ + off;
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} else {
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next = end_ + off;
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}
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if (next < beg_ || next >= end_)
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bad_seek();
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pos_ = iostreams::seek(this->component(), next - pos_, BOOST_IOS::cur);
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return pos_ - beg_;
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}
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//--------------Implementation of offset_direct_device------------------------//
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template<typename Device>
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offset_direct_device<Device>::offset_direct_device
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(const Device& dev, stream_offset off, stream_offset len)
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: basic_adapter<Device>(dev), beg_(0), end_(0)
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{
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std::pair<char_type*, char_type*> seq =
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sequence(is_convertible<category, input>());
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if (off < 0 || len < 0 || off + len > seq.second - seq.first)
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throw BOOST_IOSTREAMS_FAILURE("bad offset");
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beg_ = seq.first + off;
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end_ = seq.first + off + len;
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}
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template<typename Device>
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typename offset_direct_device<Device>::pair_type
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offset_direct_device<Device>::input_sequence()
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{
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BOOST_STATIC_ASSERT((is_convertible<category, input>::value));
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return std::make_pair(beg_, end_);
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}
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template<typename Device>
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typename offset_direct_device<Device>::pair_type
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offset_direct_device<Device>::output_sequence()
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{
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BOOST_STATIC_ASSERT((is_convertible<category, output>::value));
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return std::make_pair(beg_, end_);
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}
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template<typename Device>
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typename offset_direct_device<Device>::pair_type
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offset_direct_device<Device>::sequence(mpl::true_)
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{ return iostreams::input_sequence(this->component()); }
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template<typename Device>
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typename offset_direct_device<Device>::pair_type
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offset_direct_device<Device>::sequence(mpl::false_)
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{ return iostreams::output_sequence(this->component()); }
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//--------------Implementation of offset_filter-------------------------------//
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template<typename Filter>
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offset_filter<Filter>::offset_filter
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(const Filter& flt, stream_offset off, stream_offset len)
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: basic_adapter<Filter>(flt), beg_(off),
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pos_(off), end_(off + len), open_(false)
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{
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if (len < 0 || off < 0)
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throw BOOST_IOSTREAMS_FAILURE("bad offset");
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}
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} // End namespace detail.
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} } // End namespaces iostreams, boost.
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#endif // #ifndef BOOST_IOSTREAMS_OFFSET_HPP_INCLUDED
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