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io.hpp
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io.hpp
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//
// socket_type.hpp
// ~~~~~~~~~~~~~~~
//
// Copyright (c) 2013 Jack (jack dot wgm at gmail dot com)
// Copyright (c) 2003, Arvid Norberg
//
// 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)
//
#pragma once
#include <string>
#include <algorithm>
namespace endian {
template <class T> struct type {};
// reads an integer from a byte stream in big endian byte order and converts
// it to native endianess
template <class T, class InIt>
inline T read_impl(InIt& start, type<T>)
{
T ret = 0;
for (int i = 0; i < (int)sizeof(T); ++i)
{
ret <<= 8;
ret |= static_cast<uint8_t>(*start);
++start;
}
return ret;
}
template <class InIt>
uint8_t read_impl(InIt& start, type<uint8_t>)
{
return static_cast<uint8_t>(*start++);
}
template <class InIt>
int8_t read_impl(InIt& start, type<int8_t>)
{
return static_cast<int8_t>(*start++);
}
template <class T, class OutIt>
inline void write_impl(T val, OutIt& start)
{
for (int i = (int)sizeof(T)-1; i >= 0; --i)
{
*start = static_cast<unsigned char>((val >> (i * 8)) & 0xff);
++start;
}
}
// -- adaptors
template <class InIt>
int64_t read_int64(InIt& start)
{ return read_impl(start, type<int64_t>()); }
template <class InIt>
uint64_t read_uint64(InIt& start)
{ return read_impl(start, type<uint64_t>()); }
template <class InIt>
uint32_t read_uint32(InIt& start)
{ return read_impl(start, type<uint32_t>()); }
template <class InIt>
int32_t read_int32(InIt& start)
{ return read_impl(start, type<int32_t>()); }
template <class InIt>
int16_t read_int16(InIt& start)
{ return read_impl(start, type<int16_t>()); }
template <class InIt>
uint16_t read_uint16(InIt& start)
{ return read_impl(start, type<uint16_t>()); }
template <class InIt>
int8_t read_int8(InIt& start)
{ return read_impl(start, type<int8_t>()); }
template <class InIt>
uint8_t read_uint8(InIt& start)
{ return read_impl(start, type<uint8_t>()); }
template <class OutIt>
void write_uint64(uint64_t val, OutIt& start)
{ write_impl(val, start); }
template <class OutIt>
void write_int64(int64_t val, OutIt& start)
{ write_impl(val, start); }
template <class OutIt>
void write_uint32(uint32_t val, OutIt& start)
{ write_impl(val, start); }
template <class OutIt>
void write_int32(int32_t val, OutIt& start)
{ write_impl(val, start); }
template <class OutIt>
void write_uint16(uint16_t val, OutIt& start)
{ write_impl(val, start); }
template <class OutIt>
void write_int16(int16_t val, OutIt& start)
{ write_impl(val, start); }
template <class OutIt>
void write_uint8(uint8_t val, OutIt& start)
{ write_impl(val, start); }
template <class OutIt>
void write_int8(int8_t val, OutIt& start)
{ write_impl(val, start); }
inline void write_string(std::string const& str, char*& start)
{
std::memcpy((void*)start, str.c_str(), str.size());
start += str.size();
}
template <class OutIt>
void write_string(std::string const& str, OutIt& start)
{
std::copy(str.begin(), str.end(), start);
}
}