156 lines
4.4 KiB
C++
156 lines
4.4 KiB
C++
/*
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Copyright (c) 2003, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_IO_HPP_INCLUDED
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#define TORRENT_IO_HPP_INCLUDED
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#include <boost/cstdint.hpp>
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#include <string>
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#include <algorithm> // for copy
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#include <cstring> // for memcpy
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namespace libtorrent
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{
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namespace detail
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{
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template <class T> struct type {};
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// reads an integer from a byte stream
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// in big endian byte order and converts
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// it to native endianess
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template <class T, class InIt>
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inline T read_impl(InIt& start, type<T>)
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{
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T ret = 0;
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for (int i = 0; i < (int)sizeof(T); ++i)
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{
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ret <<= 8;
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ret |= static_cast<unsigned char>(*start);
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++start;
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}
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return ret;
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}
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template <class T, class OutIt>
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inline void write_impl(T val, OutIt& start)
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{
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for (int i = (int)sizeof(T)-1; i >= 0; --i)
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{
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*start = static_cast<unsigned char>((val >> (i * 8)) & 0xff);
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++start;
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}
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}
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// -- adaptors
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template <class InIt>
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boost::int64_t read_int64(InIt& start)
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{ return read_impl(start, type<boost::int64_t>()); }
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template <class InIt>
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boost::uint64_t read_uint64(InIt& start)
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{ return read_impl(start, type<boost::uint64_t>()); }
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template <class InIt>
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boost::uint32_t read_uint32(InIt& start)
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{ return read_impl(start, type<boost::uint32_t>()); }
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template <class InIt>
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boost::int32_t read_int32(InIt& start)
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{ return read_impl(start, type<boost::int32_t>()); }
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template <class InIt>
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boost::int16_t read_int16(InIt& start)
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{ return read_impl(start, type<boost::int16_t>()); }
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template <class InIt>
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boost::uint16_t read_uint16(InIt& start)
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{ return read_impl(start, type<boost::uint16_t>()); }
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template <class InIt>
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boost::int8_t read_int8(InIt& start)
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{ return read_impl(start, type<boost::int8_t>()); }
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template <class InIt>
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boost::uint8_t read_uint8(InIt& start)
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{ return read_impl(start, type<boost::uint8_t>()); }
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template <class OutIt>
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void write_uint64(boost::uint64_t val, OutIt& start)
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{ write_impl(val, start); }
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template <class OutIt>
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void write_int64(boost::int64_t val, OutIt& start)
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{ write_impl(val, start); }
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template <class OutIt>
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void write_uint32(boost::uint32_t val, OutIt& start)
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{ write_impl(val, start); }
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template <class OutIt>
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void write_int32(boost::int32_t val, OutIt& start)
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{ write_impl(val, start); }
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template <class OutIt>
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void write_uint16(boost::uint16_t val, OutIt& start)
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{ write_impl(val, start); }
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template <class OutIt>
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void write_int16(boost::int16_t val, OutIt& start)
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{ write_impl(val, start); }
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template <class OutIt>
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void write_uint8(boost::uint8_t val, OutIt& start)
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{ write_impl(val, start); }
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template <class OutIt>
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void write_int8(boost::int8_t val, OutIt& start)
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{ write_impl(val, start); }
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inline void write_string(std::string const& str, char*& start)
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{
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std::memcpy((void*)start, &str[0], str.size());
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start += str.size();
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}
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template <class OutIt>
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void write_string(std::string const& str, OutIt& start)
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{
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std::copy(str.begin(), str.end(), start);
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}
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}
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}
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#endif // TORRENT_IO_HPP_INCLUDED
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