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Extend CustomUintFormatter to support enums

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Extracted by Pieter Wuille from a comment by Russ Yanofsky, see
https://github.com/bitcoin/bitcoin/pull/18317#discussion_r398821936.
This commit is contained in:
Russell Yanofsky 2020-03-30 15:32:39 -07:00 • committed by Pieter Wuille
parent 769ee5fa00
commit 6f9a1e5ad0
1 changed files with 4 additions and 3 deletions
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7
src/serialize.h
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@ -538,14 +538,15 @@ struct CustomUintFormatter
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");
using U = typename std::conditional<std::is_enum<I>::value, std::underlying_type<I>, std::common_type<I>>::type::type;
static_assert(std::numeric_limits<U>::max() >= MAX && std::numeric_limits<U>::min() <= 0, "Assigned type too small");
uint64_t raw = 0;
if (BigEndian) {
s.read(((char*)&raw) + 8 - Bytes, Bytes);
v = be64toh(raw);
v = static_cast<I>(be64toh(raw));
} else {
s.read((char*)&raw, Bytes);
v = le64toh(raw);
v = static_cast<I>(le64toh(raw));
}
}
};