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Add CustomUintFormatter

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This commit is contained in:
Pieter Wuille 2020-02-15 19:48:42 -08:00
parent 10633398f2
commit e574fff53e
1 changed files with 22 additions and 0 deletions
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22
src/serialize.h
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@ -513,6 +513,28 @@ struct VarIntFormatter
} }
}; };
template<int Bytes>
struct CustomUintFormatter
{
static_assert(Bytes > 0 && Bytes <= 8, "CustomUintFormatter Bytes out of range");
static constexpr uint64_t MAX = 0xffffffffffffffff >> (8 * (8 - Bytes));
template <typename Stream, typename I> void Ser(Stream& s, I v)
{
if (v < 0 || v > MAX) throw std::ios_base::failure("CustomUintFormatter value out of range");
uint64_t raw = htole64(v);
s.write((const char*)&raw, Bytes);
}
template <typename Stream, typename I> void Unser(Stream& s, I& v)
{
static_assert(std::numeric_limits<I>::max() >= MAX && std::numeric_limits<I>::min() <= 0, "CustomUintFormatter type too small");
uint64_t raw = 0;
s.read((char*)&raw, Bytes);
v = le64toh(raw);
}
};
/** Serialization wrapper class for big-endian integers. /** Serialization wrapper class for big-endian integers.
* *
* Use this wrapper around integer types that are stored in memory in native * Use this wrapper around integer types that are stored in memory in native