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#pragma once
#include "coding/varint.hpp"
#include "base/buffer_vector.hpp"
#include "std/algorithm.hpp"
#include "std/string.hpp"
#include "std/vector.hpp"
#include "std/type_traits.hpp"
namespace rw
{
template <class TSink>
void Write(TSink & sink, uint32_t i)
{
WriteVarUint(sink, i);
}
template <class TSource>
void Read(TSource & src, uint32_t & i)
{
i = ReadVarUint<uint32_t>(src);
}
template <class TSink>
void Write(TSink & sink, string const & s)
{
uint32_t const count = static_cast<uint32_t>(s.size());
WriteVarUint(sink, count);
if (!s.empty())
sink.Write(&s[0], count);
}
template <class TSource>
void Read(TSource & src, string & s)
{
uint32_t const count = ReadVarUint<uint32_t>(src);
s.resize(count);
if (count > 0)
src.Read(&s[0], count);
}
namespace impl
{
template <class TSink, class TCont>
void WriteCont(TSink & sink, TCont const & v)
{
uint32_t const count = static_cast<uint32_t>(v.size());
WriteVarUint(sink, count);
for (uint32_t i = 0; i < count; ++i)
Write(sink, v[i]);
}
template <class TSource, class TCont>
void ReadCont(TSource & src, TCont & v)
{
uint32_t const count = ReadVarUint<uint32_t>(src);
v.resize(count);
for (size_t i = 0; i < count; ++i)
Read(src, v[i]);
}
}
template <class TSink, class T>
void Write(TSink & sink, vector<T> const & v)
{
impl::WriteCont(sink, v);
}
template <class TSource, class T>
void Read(TSource & src, vector<T> & v)
{
impl::ReadCont(src, v);
}
template <class TSink, class T, size_t N>
void Write(TSink & sink, buffer_vector<T, N> const & v)
{
impl::WriteCont(sink, v);
}
template <class TSource, class T, size_t N>
void Read(TSource & src, buffer_vector<T, N> & v)
{
impl::ReadCont(src, v);
}
template <class TSource, class TCont>
void ReadVectorOfPOD(TSource & src, TCont & v)
{
typedef typename TCont::value_type ValueT;
/// This assert fails on std::pair<int, int> and OsmID class.
/// @todo Review this logic in future with new compiler abilities.
/// https://trello.com/c/hzCc9bzN/1254-is-trivial-copy-read-write-utils-hpp
//static_assert(is_trivially_copyable<ValueT>::value, "");
uint32_t const count = ReadVarUint<uint32_t>(src);
if (count > 0)
{
v.resize(count);
src.Read(&v[0], count * sizeof(ValueT));
}
}
template <class TSink, class TCont>
void WriteVectorOfPOD(TSink & sink, TCont const & v)
{
typedef typename TCont::value_type ValueT;
/// This assert fails on std::pair<int, int> and OsmID class.
/// @todo Review this logic in future with new compiler abilities.
/// https://trello.com/c/hzCc9bzN/1254-is-trivial-copy-read-write-utils-hpp
//static_assert(is_trivially_copyable<ValueT>::value, "");
uint32_t const count = static_cast<uint32_t>(v.size());
WriteVarUint(sink, count);
if (count > 0)
sink.Write(&v[0], count * sizeof(ValueT));
}
template <class ReaderT, class WriterT>
void ReadAndWrite(ReaderT & reader, WriterT & writer, size_t bufferSize = 4*1024)
{
uint64_t size = reader.Size();
vector<char> buffer(min(bufferSize, static_cast<size_t>(size)));
while (size > 0)
{
size_t const curr = min(bufferSize, static_cast<size_t>(size));
reader.Read(&buffer[0], curr);
writer.Write(&buffer[0], curr);
size -= curr;
}
}
}
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