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Merge #17896: Convert chain to new serialization

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9b66083788

Partial #17896: Convert VARINT to the formatter/Using approach

2f1b2f4ed0

Partial #17896: Add a generic approach for (de)serialization of objects

ca62563df3
This commit is contained in:
Kittywhiskers Van Gogh 2020-01-08 08:56:19 -08:00 committed by pasta
parent e483a689e3
commit 46cb6e23dc
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GPG Key ID: 52527BEDABE87984
2 changed files with 61 additions and 50 deletions
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58
src/chain.h
View File

@ -39,17 +39,15 @@ public:
uint64_t nTimeFirst; //!< earliest time of block in file
uint64_t nTimeLast; //!< latest time of block in file
ADD_SERIALIZE_METHODS;
template <typename Stream, typename Operation>
inline void SerializationOp(Stream& s, Operation ser_action) {
READWRITE(VARINT(nBlocks));
READWRITE(VARINT(nSize));
READWRITE(VARINT(nUndoSize));
READWRITE(VARINT(nHeightFirst));
READWRITE(VARINT(nHeightLast));
READWRITE(VARINT(nTimeFirst));
READWRITE(VARINT(nTimeLast));
SERIALIZE_METHODS(CBlockFileInfo, obj)
{
READWRITE(VARINT(obj.nBlocks));
READWRITE(VARINT(obj.nSize));
READWRITE(VARINT(obj.nUndoSize));
READWRITE(VARINT(obj.nHeightFirst));
READWRITE(VARINT(obj.nHeightLast));
READWRITE(VARINT(obj.nTimeFirst));
READWRITE(VARINT(obj.nTimeLast));
}
void SetNull() {
@ -383,33 +381,27 @@ public:
hashPrev = (pprev ? pprev->GetBlockHash() : uint256());
}
ADD_SERIALIZE_METHODS;
template <typename Stream, typename Operation>
inline void SerializationOp(Stream& s, Operation ser_action) {
SERIALIZE_METHODS(CDiskBlockIndex, obj)
{
int _nVersion = s.GetVersion();
if (!(s.GetType() & SER_GETHASH))
READWRITE(VARINT(_nVersion, VarIntMode::NONNEGATIVE_SIGNED));
if (!(s.GetType() & SER_GETHASH)) READWRITE(VARINT(_nVersion, VarIntMode::NONNEGATIVE_SIGNED));
READWRITE(VARINT(nHeight, VarIntMode::NONNEGATIVE_SIGNED));
READWRITE(VARINT(nStatus));
READWRITE(VARINT(nTx));
if (nStatus & (BLOCK_HAVE_DATA | BLOCK_HAVE_UNDO))
READWRITE(VARINT(nFile, VarIntMode::NONNEGATIVE_SIGNED));
if (nStatus & BLOCK_HAVE_DATA)
READWRITE(VARINT(nDataPos));
if (nStatus & BLOCK_HAVE_UNDO)
READWRITE(VARINT(nUndoPos));
READWRITE(VARINT(obj.nHeight, VarIntMode::NONNEGATIVE_SIGNED));
READWRITE(VARINT(obj.nStatus));
READWRITE(VARINT(obj.nTx));
if (obj.nStatus & (BLOCK_HAVE_DATA | BLOCK_HAVE_UNDO)) READWRITE(VARINT(obj.nFile, VarIntMode::NONNEGATIVE_SIGNED));
if (obj.nStatus & BLOCK_HAVE_DATA) READWRITE(VARINT(obj.nDataPos));
if (obj.nStatus & BLOCK_HAVE_UNDO) READWRITE(VARINT(obj.nUndoPos));
// block hash
READWRITE(hash);
READWRITE(obj.hash);
// block header
READWRITE(this->nVersion);
READWRITE(hashPrev);
READWRITE(hashMerkleRoot);
READWRITE(nTime);
READWRITE(nBits);
READWRITE(nNonce);
READWRITE(obj.nVersion);
READWRITE(obj.hashPrev);
READWRITE(obj.hashMerkleRoot);
READWRITE(obj.nTime);
READWRITE(obj.nBits);
READWRITE(obj.nNonce);
}
uint256 GetBlockHash() const

53
src/serialize.h
View File

@ -448,11 +448,37 @@ I ReadVarInt(Stream& is)
}
}
/** Simple wrapper class to serialize objects using a formatter; used by Using(). */
template<typename Formatter, typename T>
class Wrapper
{
static_assert(std::is_lvalue_reference<T>::value, "Wrapper needs an lvalue reference type T");
protected:
T m_object;
public:
explicit Wrapper(T obj) : m_object(obj) {}
template<typename Stream> void Serialize(Stream &s) const { Formatter().Ser(s, m_object); }
template<typename Stream> void Unserialize(Stream &s) { Formatter().Unser(s, m_object); }
};
/** Cause serialization/deserialization of an object to be done using a specified formatter class.
*
* To use this, you need a class Formatter that has public functions Ser(stream, const object&) for
* serialization, and Unser(stream, object&) for deserialization. Serialization routines (inside
* READWRITE, or directly with << and >> operators), can then use Using<Formatter>(object).
*
* This works by constructing a Wrapper<Formatter, T>-wrapped version of object, where T is
* const during serialization, and non-const during deserialization, which maintains const
* correctness.
*/
template<typename Formatter, typename T>
static inline Wrapper<Formatter, T&> Using(T&& t) { return Wrapper<Formatter, T&>(t); }
#define FIXEDBITSET(obj, size) CFixedBitSet(REF(obj), (size))
#define DYNBITSET(obj) CDynamicBitSet(REF(obj))
#define FIXEDVARINTSBITSET(obj, size) CFixedVarIntsBitSet(REF(obj), (size))
#define AUTOBITSET(obj, size) CAutoBitSet(REF(obj), (size))
#define VARINT(obj, ...) WrapVarInt<__VA_ARGS__>(REF(obj))
#define VARINT(obj, ...) Using<VarIntFormatter<__VA_ARGS__>>(obj)
#define COMPACTSIZE(obj) CCompactSize(REF(obj))
#define LIMITED_STRING(obj,n) LimitedString< n >(REF(obj))
@ -612,22 +638,18 @@ public:
}
};
template<VarIntMode Mode, typename I>
class CVarInt
/** Serialization wrapper class for integers in VarInt format. */
template<VarIntMode Mode=VarIntMode::DEFAULT>
struct VarIntFormatter
{
protected:
I &n;
public:
explicit CVarInt(I& nIn) : n(nIn) { }
template<typename Stream>
void Serialize(Stream &s) const {
WriteVarInt<Stream,Mode,I>(s, n);
template<typename Stream, typename I> void Ser(Stream &s, I v)
{
WriteVarInt<Stream,Mode,typename std::remove_cv<I>::type>(s, v);
}
template<typename Stream>
void Unserialize(Stream& s) {
n = ReadVarInt<Stream,Mode,I>(s);
template<typename Stream, typename I> void Unser(Stream& s, I& v)
{
v = ReadVarInt<Stream,Mode,typename std::remove_cv<I>::type>(s);
}
};
@ -716,9 +738,6 @@ public:
}
};
template<VarIntMode Mode=VarIntMode::DEFAULT, typename I>
CVarInt<Mode, I> WrapVarInt(I& n) { return CVarInt<Mode, I>{n}; }
template<typename I>
BigEndian<I> WrapBigEndian(I& n) { return BigEndian<I>(n); }