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Merge #12683: Fix more constness violations in serialization code

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172f5fa738 Support deserializing into temporaries (Pieter Wuille)
2761bca997 Merge READWRITEMANY into READWRITE (Pieter Wuille)

Pull request description:

  This is another fragment of improvements from #10785.

  The current serialization code does not support serializing/deserializing from/to temporaries (like `s >> CFlatData(script)`). As a result, there are many invocations of the `REF` macro which in addition to changing the reference type also changes the constness. This is unnecessary in C++11 as we can use rvalue references now instead.

  The first commit is an extra simplification we can make that removes the duplication of code between `READWRITE` and `READWRITEMANY` (and related functions).

Tree-SHA512: babfa9cb268cc3bc39917e4f0a90e4651c33d85032161e16547a07f3b257b7ca7940e0cbfd69f09439d26fafbb1a6cf6359101043407e2c7aeececf7f20b6eed
This commit is contained in:
Pieter Wuille 2018-03-15 16:48:42 -07:00
commit 7be9a9a570
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GPG key ID: A636E97631F767E0
10 changed files with 30 additions and 56 deletions
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6
src/blockencodings.h
View file

@ -90,11 +90,11 @@ public:
while (txn.size() < txn_size) {
txn.resize(std::min((uint64_t)(1000 + txn.size()), txn_size));
for (; i < txn.size(); i++)
READWRITE(REF(TransactionCompressor(txn[i])));
READWRITE(TransactionCompressor(txn[i]));
}
} else {
for (size_t i = 0; i < txn.size(); i++)
READWRITE(REF(TransactionCompressor(txn[i])));
READWRITE(TransactionCompressor(txn[i]));
}
}
};
@ -115,7 +115,7 @@ struct PrefilledTransaction {
if (idx > std::numeric_limits<uint16_t>::max())
throw std::ios_base::failure("index overflowed 16-bits");
index = idx;
READWRITE(REF(TransactionCompressor(tx)));
READWRITE(TransactionCompressor(tx));
}
};

2
src/coins.h
View file

@ -69,7 +69,7 @@ public:
::Unserialize(s, VARINT(code));
nHeight = code >> 1;
fCoinBase = code & 1;
::Unserialize(s, REF(CTxOutCompressor(out)));
::Unserialize(s, CTxOutCompressor(out));
}
bool IsSpent() const {

4
src/compressor.h
View file

@ -73,7 +73,7 @@ public:
s >> VARINT(nSize);
if (nSize < nSpecialScripts) {
std::vector<unsigned char> vch(GetSpecialSize(nSize), 0x00);
s >> REF(CFlatData(vch));
s >> CFlatData(vch);
Decompress(nSize, vch);
return;
}
@ -84,7 +84,7 @@ public:
s.ignore(nSize);
} else {
script.resize(nSize);
s >> REF(CFlatData(script));
s >> CFlatData(script);
}
}
};

2
src/hash.h
View file

@ -173,7 +173,7 @@ public:
}
template<typename T>
CHashVerifier<Source>& operator>>(T& obj)
CHashVerifier<Source>& operator>>(T&& obj)
{
// Unserialize from this stream
::Unserialize(*this, obj);

2
src/script/bitcoinconsensus.cpp
View file

@ -40,7 +40,7 @@ public:
}
template<typename T>
TxInputStream& operator>>(T& obj)
TxInputStream& operator>>(T&& obj)
{
::Unserialize(*this, obj);
return *this;

52
src/serialize.h
View file

@ -148,8 +148,7 @@ enum
SER_GETHASH = (1 << 2),
};
#define READWRITE(obj) (::SerReadWrite(s, (obj), ser_action))
#define READWRITEMANY(...) (::SerReadWriteMany(s, ser_action, __VA_ARGS__))
#define READWRITE(...) (::SerReadWriteMany(s, ser_action, __VA_ARGS__))
/**
* Implement three methods for serializable objects. These are actually wrappers over
@ -351,10 +350,10 @@ I ReadVarInt(Stream& is)
}
}
#define FLATDATA(obj) REF(CFlatData((char*)&(obj), (char*)&(obj) + sizeof(obj)))
#define VARINT(obj) REF(WrapVarInt(REF(obj)))
#define COMPACTSIZE(obj) REF(CCompactSize(REF(obj)))
#define LIMITED_STRING(obj,n) REF(LimitedString< n >(REF(obj)))
#define FLATDATA(obj) CFlatData((char*)&(obj), (char*)&(obj) + sizeof(obj))
#define VARINT(obj) WrapVarInt(REF(obj))
#define COMPACTSIZE(obj) CCompactSize(REF(obj))
#define LIMITED_STRING(obj,n) LimitedString< n >(REF(obj))
/**
* Wrapper for serializing arrays and POD.
@ -539,7 +538,7 @@ inline void Serialize(Stream& os, const T& a)
}
template<typename Stream, typename T>
inline void Unserialize(Stream& is, T& a)
inline void Unserialize(Stream& is, T&& a)
{
a.Unserialize(is);
}
@ -825,19 +824,6 @@ struct CSerActionUnserialize
constexpr bool ForRead() const { return true; }
};
template<typename Stream, typename T>
inline void SerReadWrite(Stream& s, const T& obj, CSerActionSerialize ser_action)
{
::Serialize(s, obj);
}
template<typename Stream, typename T>
inline void SerReadWrite(Stream& s, T& obj, CSerActionUnserialize ser_action)
{
::Unserialize(s, obj);
}
@ -897,17 +883,11 @@ void SerializeMany(Stream& s)
{
}
template<typename Stream, typename Arg>
void SerializeMany(Stream& s, Arg&& arg)
{
::Serialize(s, std::forward<Arg>(arg));
}
template<typename Stream, typename Arg, typename... Args>
void SerializeMany(Stream& s, Arg&& arg, Args&&... args)
void SerializeMany(Stream& s, const Arg& arg, const Args&... args)
{
::Serialize(s, std::forward<Arg>(arg));
::SerializeMany(s, std::forward<Args>(args)...);
::Serialize(s, arg);
::SerializeMany(s, args...);
}
template<typename Stream>
@ -915,27 +895,21 @@ inline void UnserializeMany(Stream& s)
{
}
template<typename Stream, typename Arg>
inline void UnserializeMany(Stream& s, Arg& arg)
{
::Unserialize(s, arg);
}
template<typename Stream, typename Arg, typename... Args>
inline void UnserializeMany(Stream& s, Arg& arg, Args&... args)
inline void UnserializeMany(Stream& s, Arg&& arg, Args&&... args)
{
::Unserialize(s, arg);
::UnserializeMany(s, args...);
}
template<typename Stream, typename... Args>
inline void SerReadWriteMany(Stream& s, CSerActionSerialize ser_action, Args&&... args)
inline void SerReadWriteMany(Stream& s, CSerActionSerialize ser_action, const Args&... args)
{
::SerializeMany(s, std::forward<Args>(args)...);
::SerializeMany(s, args...);
}
template<typename Stream, typename... Args>
inline void SerReadWriteMany(Stream& s, CSerActionUnserialize ser_action, Args&... args)
inline void SerReadWriteMany(Stream& s, CSerActionUnserialize ser_action, Args&&... args)
{
::UnserializeMany(s, args...);
}

8
src/streams.h
View file

@ -42,7 +42,7 @@ public:
}
template<typename T>
OverrideStream<Stream>& operator>>(T& obj)
OverrideStream<Stream>& operator>>(T&& obj)
{
// Unserialize from this stream
::Unserialize(*this, obj);
@ -399,7 +399,7 @@ public:
}
template<typename T>
CDataStream& operator>>(T& obj)
CDataStream& operator>>(T&& obj)
{
// Unserialize from this stream
::Unserialize(*this, obj);
@ -543,7 +543,7 @@ public:
}
template<typename T>
CAutoFile& operator>>(T& obj)
CAutoFile& operator>>(T&& obj)
{
// Unserialize from this stream
if (!file)
@ -686,7 +686,7 @@ public:
}
template<typename T>
CBufferedFile& operator>>(T& obj) {
CBufferedFile& operator>>(T&& obj) {
// Unserialize from this stream
::Unserialize(*this, obj);
return (*this);

2
src/test/serialize_tests.cpp
View file

@ -53,7 +53,7 @@ public:
template <typename Stream, typename Operation>
inline void SerializationOp(Stream& s, Operation ser_action) {
READWRITEMANY(intval, boolval, stringval, FLATDATA(charstrval), txval);
READWRITE(intval, boolval, stringval, FLATDATA(charstrval), txval);
}
};

2
src/txdb.cpp
View file

@ -348,7 +348,7 @@ public:
vout.assign(vAvail.size(), CTxOut());
for (unsigned int i = 0; i < vAvail.size(); i++) {
if (vAvail[i])
::Unserialize(s, REF(CTxOutCompressor(vout[i])));
::Unserialize(s, CTxOutCompressor(vout[i]));
}
// coinbase height
::Unserialize(s, VARINT(nHeight));

6
src/undo.h
View file

@ -54,7 +54,7 @@ public:
int nVersionDummy;
::Unserialize(s, VARINT(nVersionDummy));
}
::Unserialize(s, REF(CTxOutCompressor(REF(txout->out))));
::Unserialize(s, CTxOutCompressor(REF(txout->out)));
}
explicit TxInUndoDeserializer(Coin* coin) : txout(coin) {}
@ -76,7 +76,7 @@ public:
uint64_t count = vprevout.size();
::Serialize(s, COMPACTSIZE(REF(count)));
for (const auto& prevout : vprevout) {
::Serialize(s, REF(TxInUndoSerializer(&prevout)));
::Serialize(s, TxInUndoSerializer(&prevout));
}
}
@ -90,7 +90,7 @@ public:
}
vprevout.resize(count);
for (auto& prevout : vprevout) {
::Unserialize(s, REF(TxInUndoDeserializer(&prevout)));
::Unserialize(s, TxInUndoDeserializer(&prevout));
}
}
};