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Add DifferenceFormatter

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This commit is contained in:
Russell Yanofsky 2020-02-15 19:05:11 -08:00 committed by Pieter Wuille
parent 56dd9f04c7
commit 10633398f2
1 changed files with 22 additions and 0 deletions
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22
src/blockencodings.h
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@ -25,6 +25,28 @@ public:
}
};
class DifferenceFormatter
{
uint64_t m_shift = 0;
public:
template<typename Stream, typename I>
void Ser(Stream& s, I v)
{
if (v < m_shift || v >= std::numeric_limits<uint64_t>::max()) throw std::ios_base::failure("differential value overflow");
WriteCompactSize(s, v - m_shift);
m_shift = uint64_t(v) + 1;
}
template<typename Stream, typename I>
void Unser(Stream& s, I& v)
{
uint64_t n = ReadCompactSize(s);
m_shift += n;
if (m_shift < n || m_shift >= std::numeric_limits<uint64_t>::max() || m_shift < std::numeric_limits<I>::min() || m_shift > std::numeric_limits<I>::max()) throw std::ios_base::failure("differential value overflow");
v = I(m_shift++);
}
};
class BlockTransactionsRequest {
public:
// A BlockTransactionsRequest message