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author | Wladimir J. van der Laan <laanwj@gmail.com> | 2018-04-08 17:57:22 +0200 |
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committer | Wladimir J. van der Laan <laanwj@gmail.com> | 2018-04-08 18:13:49 +0200 |
commit | 97785863e2faa4a6d4e1130e300011985df0858c (patch) | |
tree | 786d40d6722e49fa007387719f113a07601a5b20 /src/serialize.h | |
parent | 15c3bb4268f3366c26a1ba28d32216f2ff86fe7f (diff) | |
parent | 9272d70536287d4ff9aa1ee41a401465c0e8194a (diff) | |
download | bitcoin-97785863e2faa4a6d4e1130e300011985df0858c.tar.xz |
Merge #12886: Introduce Span type and use it instead of FLATDATA
9272d70 Support serializing Span<unsigned char> and use that instead of FLATDATA (Pieter Wuille)
833bc08 Add Slice: a (pointer, size) array view that acts like a container (Pieter Wuille)
Pull request description:
Introduce a new data type `Span`, which is an encapsulated pointer + size (like C++20's `std::span` or LevelDB's `Slice`), and represents a view to a sequence of objects laid out continuously in memory.
The immediate use case is replacing the remaining `FLATDATA` invocations. Instead of those, we support serializing/deserializing unsigned char `Span`s (treating them as arrays).
A longer term goal for `Span`s is making the script execution operate on them rather than on `CScript` itself. This will allow separate storage mechanisms for scripts.
Tree-SHA512: 7b0da3c802e5df367f223275004d16b04262804c007b7c73fda927176f0a9c3b2ef3225fa842cb73500b0df73175ec1419f1f5239de2402e21dd9ae8e5d05233
Diffstat (limited to 'src/serialize.h')
-rw-r--r-- | src/serialize.h | 47 |
1 files changed, 5 insertions, 42 deletions
diff --git a/src/serialize.h b/src/serialize.h index 247e915298..e90b041cc2 100644 --- a/src/serialize.h +++ b/src/serialize.h @@ -22,6 +22,7 @@ #include <vector> #include <prevector.h> +#include <span.h> static const unsigned int MAX_SIZE = 0x02000000; @@ -41,7 +42,7 @@ constexpr deserialize_type deserialize {}; /** * Used to bypass the rule against non-const reference to temporary - * where it makes sense with wrappers such as CFlatData or CTxDB + * where it makes sense with wrappers. */ template<typename T> inline T& REF(const T& val) @@ -185,6 +186,8 @@ template<typename Stream> inline void Serialize(Stream& s, float a ) { ser_wri template<typename Stream> inline void Serialize(Stream& s, double a ) { ser_writedata64(s, ser_double_to_uint64(a)); } template<typename Stream, int N> inline void Serialize(Stream& s, const char (&a)[N]) { s.write(a, N); } template<typename Stream, int N> inline void Serialize(Stream& s, const unsigned char (&a)[N]) { s.write(CharCast(a), N); } +template<typename Stream> inline void Serialize(Stream& s, const Span<const unsigned char>& span) { s.write(CharCast(span.data()), span.size()); } +template<typename Stream> inline void Serialize(Stream& s, const Span<unsigned char>& span) { s.write(CharCast(span.data()), span.size()); } template<typename Stream> inline void Unserialize(Stream& s, char& a ) { a = ser_readdata8(s); } // TODO Get rid of bare char template<typename Stream> inline void Unserialize(Stream& s, int8_t& a ) { a = ser_readdata8(s); } @@ -199,6 +202,7 @@ template<typename Stream> inline void Unserialize(Stream& s, float& a ) { a = template<typename Stream> inline void Unserialize(Stream& s, double& a ) { a = ser_uint64_to_double(ser_readdata64(s)); } template<typename Stream, int N> inline void Unserialize(Stream& s, char (&a)[N]) { s.read(a, N); } template<typename Stream, int N> inline void Unserialize(Stream& s, unsigned char (&a)[N]) { s.read(CharCast(a), N); } +template<typename Stream> inline void Unserialize(Stream& s, Span<unsigned char>& span) { s.read(CharCast(span.data()), span.size()); } template<typename Stream> inline void Serialize(Stream& s, bool a) { char f=a; ser_writedata8(s, f); } template<typename Stream> inline void Unserialize(Stream& s, bool& a) { char f=ser_readdata8(s); a=f; } @@ -384,51 +388,10 @@ I ReadVarInt(Stream& is) } } -#define FLATDATA(obj) CFlatData((char*)&(obj), (char*)&(obj) + sizeof(obj)) #define VARINT(obj, ...) WrapVarInt<__VA_ARGS__>(REF(obj)) #define COMPACTSIZE(obj) CCompactSize(REF(obj)) #define LIMITED_STRING(obj,n) LimitedString< n >(REF(obj)) -/** - * Wrapper for serializing arrays and POD. - */ -class CFlatData -{ -protected: - char* pbegin; - char* pend; -public: - CFlatData(void* pbeginIn, void* pendIn) : pbegin((char*)pbeginIn), pend((char*)pendIn) { } - template <class T, class TAl> - explicit CFlatData(std::vector<T,TAl> &v) - { - pbegin = (char*)v.data(); - pend = (char*)(v.data() + v.size()); - } - template <unsigned int N, typename T, typename S, typename D> - explicit CFlatData(prevector<N, T, S, D> &v) - { - pbegin = (char*)v.data(); - pend = (char*)(v.data() + v.size()); - } - char* begin() { return pbegin; } - const char* begin() const { return pbegin; } - char* end() { return pend; } - const char* end() const { return pend; } - - template<typename Stream> - void Serialize(Stream& s) const - { - s.write(pbegin, pend - pbegin); - } - - template<typename Stream> - void Unserialize(Stream& s) - { - s.read(pbegin, pend - pbegin); - } -}; - template<VarIntMode Mode, typename I> class CVarInt { |