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Add Read:reader -> Write:writer function.

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vng 2012-05-08 13:10:10 +03:00 • committed by Alex Zolotarev
parent e5ee4a4407
commit d84d08fc22
2 changed files with 23 additions and 1 deletions
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17
coding/read_write_utils.hpp
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@ -114,4 +114,21 @@ namespace rw
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;
}
}
}

7
coding/reader.hpp
View file

@ -182,7 +182,7 @@ public:
{
if (m_pos + size > m_reader.Size())
{
size_t remainingSize = static_cast<size_t>(m_reader.Size() - m_pos);
size_t const remainingSize = static_cast<size_t>(Size());
m_reader.Read(m_pos, p, remainingSize);
m_pos = m_reader.Size();
MYTHROW1(SourceOutOfBoundsException, remainingSize, ());
@ -204,6 +204,11 @@ public:
return m_pos;
}
uint64_t Size() const
{
return (m_reader.Size() - m_pos);
}
ReaderT const & Reader() const
{
return m_reader;