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Make VectorFormatter support stateful formatters

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This commit is contained in:
Russell Yanofsky
2020-02-15 19:09:09 -08:00
committed by Pieter Wuille
parent 3ca574cef0
commit 56dd9f04c7
2 changed files with 13 additions and 7 deletions
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11
src/serialize.h
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@@ -613,7 +613,7 @@ BigEndian<I> WrapBigEndian(I& n) { return BigEndian<I>(n); }
* as a vector of VarInt-encoded integers.
*
* V is not required to be an std::vector type. It works for any class that
* exposes a value_type, size, reserve, push_back, and const iterators.
* exposes a value_type, size, reserve, emplace_back, back, and const iterators.
*/
template<class Formatter>
struct VectorFormatter
@@ -621,15 +621,17 @@ struct VectorFormatter
template<typename Stream, typename V>
void Ser(Stream& s, const V& v)
{
Formatter formatter;
WriteCompactSize(s, v.size());
for (const typename V::value_type& elem : v) {
s << Using<Formatter>(elem);
formatter.Ser(s, elem);
}
}
template<typename Stream, typename V>
void Unser(Stream& s, V& v)
{
Formatter formatter;
v.clear();
size_t size = ReadCompactSize(s);
size_t allocated = 0;
@@ -641,9 +643,8 @@ struct VectorFormatter
allocated = std::min(size, allocated + MAX_VECTOR_ALLOCATE / sizeof(typename V::value_type));
v.reserve(allocated);
while (v.size() < allocated) {
typename V::value_type val;
s >> Using<Formatter>(val);
v.push_back(std::move(val));
v.emplace_back();
formatter.Unser(s, v.back());
}
}
};