Merge pull request #5198
1c0aa91 Update serialize comments to be doxygen compatible (Michael Ford)This commit is contained in:
Wladimir J. van der Laan
commit
3d3ce7421e
1 changed files with 100 additions and 78 deletions
178
src/serialize.h
178
src/serialize.h
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@ -1,6 +1,6 @@
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// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2013 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// Copyright (c) 2009-2014 The Bitcoin developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_SERIALIZE_H
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@ -22,23 +22,28 @@ class CScript;
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static const unsigned int MAX_SIZE = 0x02000000;
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// Used to bypass the rule against non-const reference to temporary
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// where it makes sense with wrappers such as CFlatData or CTxDB
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/**
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* Used to bypass the rule against non-const reference to temporary
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* where it makes sense with wrappers such as CFlatData or CTxDB
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*/
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template<typename T>
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inline T& REF(const T& val)
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{
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return const_cast<T&>(val);
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}
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// Used to acquire a non-const pointer "this" to generate bodies
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// of const serialization operations from a template
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/**
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* Used to acquire a non-const pointer "this" to generate bodies
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* of const serialization operations from a template
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*/
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template<typename T>
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inline T* NCONST_PTR(const T* val)
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{
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return const_cast<T*>(val);
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}
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/** Get begin pointer of vector (non-const version).
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/**
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* Get begin pointer of vector (non-const version).
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* @note These functions avoid the undefined case of indexing into an empty
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* vector, as well as that of indexing after the end of the vector.
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*/
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@ -82,10 +87,12 @@ enum
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#define READWRITE(obj) (::SerReadWrite(s, (obj), nType, nVersion, ser_action))
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/* Implement three methods for serializable objects. These are actually wrappers over
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/**
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* Implement three methods for serializable objects. These are actually wrappers over
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* "SerializationOp" template, which implements the body of each class' serialization
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* code. Adding "ADD_SERIALIZE_METHODS" in the body of the class causes these wrappers to be
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* added as members. */
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* added as members.
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*/
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#define ADD_SERIALIZE_METHODS \
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size_t GetSerializeSize(int nType, int nVersion) const { \
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CSizeComputer s(nType, nVersion); \
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@ -103,9 +110,9 @@ enum
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//
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// Basic types
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//
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/*
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* Basic Types
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*/
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#define WRITEDATA(s, obj) s.write((char*)&(obj), sizeof(obj))
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#define READDATA(s, obj) s.read((char*)&(obj), sizeof(obj))
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@ -160,13 +167,13 @@ template<typename Stream> inline void Unserialize(Stream& s, bool& a, int, int=0
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//
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// Compact size
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// size < 253 -- 1 byte
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// size <= USHRT_MAX -- 3 bytes (253 + 2 bytes)
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// size <= UINT_MAX -- 5 bytes (254 + 4 bytes)
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// size > UINT_MAX -- 9 bytes (255 + 8 bytes)
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//
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/**
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* Compact Size
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* size < 253 -- 1 byte
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* size <= USHRT_MAX -- 3 bytes (253 + 2 bytes)
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* size <= UINT_MAX -- 5 bytes (254 + 4 bytes)
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* size > UINT_MAX -- 9 bytes (255 + 8 bytes)
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*/
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inline unsigned int GetSizeOfCompactSize(uint64_t nSize)
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{
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if (nSize < 253) return sizeof(unsigned char);
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@ -246,27 +253,29 @@ uint64_t ReadCompactSize(Stream& is)
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return nSizeRet;
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}
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// Variable-length integers: bytes are a MSB base-128 encoding of the number.
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// The high bit in each byte signifies whether another digit follows. To make
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// the encoding is one-to-one, one is subtracted from all but the last digit.
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// Thus, the byte sequence a[] with length len, where all but the last byte
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// has bit 128 set, encodes the number:
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//
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// (a[len-1] & 0x7F) + sum(i=1..len-1, 128^i*((a[len-i-1] & 0x7F)+1))
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//
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// Properties:
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// * Very small (0-127: 1 byte, 128-16511: 2 bytes, 16512-2113663: 3 bytes)
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// * Every integer has exactly one encoding
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// * Encoding does not depend on size of original integer type
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// * No redundancy: every (infinite) byte sequence corresponds to a list
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// of encoded integers.
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//
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// 0: [0x00] 256: [0x81 0x00]
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// 1: [0x01] 16383: [0xFE 0x7F]
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// 127: [0x7F] 16384: [0xFF 0x00]
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// 128: [0x80 0x00] 16511: [0x80 0xFF 0x7F]
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// 255: [0x80 0x7F] 65535: [0x82 0xFD 0x7F]
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// 2^32: [0x8E 0xFE 0xFE 0xFF 0x00]
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/**
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* Variable-length integers: bytes are a MSB base-128 encoding of the number.
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* The high bit in each byte signifies whether another digit follows. To make
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* sure the encoding is one-to-one, one is subtracted from all but the last digit.
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* Thus, the byte sequence a[] with length len, where all but the last byte
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* has bit 128 set, encodes the number:
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*
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* (a[len-1] & 0x7F) + sum(i=1..len-1, 128^i*((a[len-i-1] & 0x7F)+1))
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*
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* Properties:
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* * Very small (0-127: 1 byte, 128-16511: 2 bytes, 16512-2113663: 3 bytes)
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* * Every integer has exactly one encoding
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* * Encoding does not depend on size of original integer type
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* * No redundancy: every (infinite) byte sequence corresponds to a list
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* of encoded integers.
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*
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* 0: [0x00] 256: [0x81 0x00]
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* 1: [0x01] 16383: [0xFE 0x7F]
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* 127: [0x7F] 16384: [0xFF 0x00]
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* 128: [0x80 0x00] 16511: [0x80 0xFF 0x7F]
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* 255: [0x80 0x7F] 65535: [0x82 0xFD 0x7F]
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* 2^32: [0x8E 0xFE 0xFE 0xFF 0x00]
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*/
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template<typename I>
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inline unsigned int GetSizeOfVarInt(I n)
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@ -317,7 +326,8 @@ I ReadVarInt(Stream& is)
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#define VARINT(obj) REF(WrapVarInt(REF(obj)))
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#define LIMITED_STRING(obj,n) REF(LimitedString< n >(REF(obj)))
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/** Wrapper for serializing arrays and POD.
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/**
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* Wrapper for serializing arrays and POD.
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*/
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class CFlatData
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{
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@ -415,17 +425,21 @@ public:
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template<typename I>
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CVarInt<I> WrapVarInt(I& n) { return CVarInt<I>(n); }
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//
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// Forward declarations
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//
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/**
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* Forward declarations
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*/
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// string
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/**
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* string
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*/
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template<typename C> unsigned int GetSerializeSize(const std::basic_string<C>& str, int, int=0);
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template<typename Stream, typename C> void Serialize(Stream& os, const std::basic_string<C>& str, int, int=0);
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template<typename Stream, typename C> void Unserialize(Stream& is, std::basic_string<C>& str, int, int=0);
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// vector
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// vectors of unsigned char are a special case and are intended to be serialized as a single opaque blob.
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/**
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* vector
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* vectors of unsigned char are a special case and are intended to be serialized as a single opaque blob.
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*/
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template<typename T, typename A> unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const unsigned char&);
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template<typename T, typename A, typename V> unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const V&);
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template<typename T, typename A> inline unsigned int GetSerializeSize(const std::vector<T, A>& v, int nType, int nVersion);
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@ -436,22 +450,30 @@ template<typename Stream, typename T, typename A> void Unserialize_impl(Stream&
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template<typename Stream, typename T, typename A, typename V> void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const V&);
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template<typename Stream, typename T, typename A> inline void Unserialize(Stream& is, std::vector<T, A>& v, int nType, int nVersion);
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// others derived from vector
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/**
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* others derived from vector
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*/
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extern inline unsigned int GetSerializeSize(const CScript& v, int nType, int nVersion);
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template<typename Stream> void Serialize(Stream& os, const CScript& v, int nType, int nVersion);
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template<typename Stream> void Unserialize(Stream& is, CScript& v, int nType, int nVersion);
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// pair
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/**
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* pair
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*/
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template<typename K, typename T> unsigned int GetSerializeSize(const std::pair<K, T>& item, int nType, int nVersion);
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template<typename Stream, typename K, typename T> void Serialize(Stream& os, const std::pair<K, T>& item, int nType, int nVersion);
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template<typename Stream, typename K, typename T> void Unserialize(Stream& is, std::pair<K, T>& item, int nType, int nVersion);
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// map
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/**
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* map
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*/
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template<typename K, typename T, typename Pred, typename A> unsigned int GetSerializeSize(const std::map<K, T, Pred, A>& m, int nType, int nVersion);
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template<typename Stream, typename K, typename T, typename Pred, typename A> void Serialize(Stream& os, const std::map<K, T, Pred, A>& m, int nType, int nVersion);
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template<typename Stream, typename K, typename T, typename Pred, typename A> void Unserialize(Stream& is, std::map<K, T, Pred, A>& m, int nType, int nVersion);
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// set
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/**
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* set
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*/
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template<typename K, typename Pred, typename A> unsigned int GetSerializeSize(const std::set<K, Pred, A>& m, int nType, int nVersion);
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template<typename Stream, typename K, typename Pred, typename A> void Serialize(Stream& os, const std::set<K, Pred, A>& m, int nType, int nVersion);
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template<typename Stream, typename K, typename Pred, typename A> void Unserialize(Stream& is, std::set<K, Pred, A>& m, int nType, int nVersion);
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@ -460,12 +482,12 @@ template<typename Stream, typename K, typename Pred, typename A> void Unserializ
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//
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// If none of the specialized versions above matched, default to calling member function.
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// "int nType" is changed to "long nType" to keep from getting an ambiguous overload error.
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// The compiler will only cast int to long if none of the other templates matched.
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// Thanks to Boost serialization for this idea.
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//
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/**
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* If none of the specialized versions above matched, default to calling member function.
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* "int nType" is changed to "long nType" to keep from getting an ambiguous overload error.
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* The compiler will only cast int to long if none of the other templates matched.
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* Thanks to Boost serialization for this idea.
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*/
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template<typename T>
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inline unsigned int GetSerializeSize(const T& a, long nType, int nVersion)
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{
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@ -488,9 +510,9 @@ inline void Unserialize(Stream& is, T& a, long nType, int nVersion)
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//
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// string
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//
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/**
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* string
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*/
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template<typename C>
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unsigned int GetSerializeSize(const std::basic_string<C>& str, int, int)
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{
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@ -516,9 +538,9 @@ void Unserialize(Stream& is, std::basic_string<C>& str, int, int)
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//
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// vector
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//
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/**
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* vector
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*/
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template<typename T, typename A>
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unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const unsigned char&)
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{
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@ -606,9 +628,9 @@ inline void Unserialize(Stream& is, std::vector<T, A>& v, int nType, int nVersio
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//
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// others derived from vector
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//
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/**
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* others derived from vector
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*/
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inline unsigned int GetSerializeSize(const CScript& v, int nType, int nVersion)
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{
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return GetSerializeSize((const std::vector<unsigned char>&)v, nType, nVersion);
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@ -628,9 +650,9 @@ void Unserialize(Stream& is, CScript& v, int nType, int nVersion)
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//
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// pair
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//
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/**
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* pair
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*/
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template<typename K, typename T>
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unsigned int GetSerializeSize(const std::pair<K, T>& item, int nType, int nVersion)
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{
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@ -653,9 +675,9 @@ void Unserialize(Stream& is, std::pair<K, T>& item, int nType, int nVersion)
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//
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// map
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//
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/**
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* map
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*/
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template<typename K, typename T, typename Pred, typename A>
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unsigned int GetSerializeSize(const std::map<K, T, Pred, A>& m, int nType, int nVersion)
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{
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@ -689,9 +711,9 @@ void Unserialize(Stream& is, std::map<K, T, Pred, A>& m, int nType, int nVersion
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//
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// set
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//
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/**
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* set
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*/
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template<typename K, typename Pred, typename A>
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unsigned int GetSerializeSize(const std::set<K, Pred, A>& m, int nType, int nVersion)
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{
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@ -725,9 +747,9 @@ void Unserialize(Stream& is, std::set<K, Pred, A>& m, int nType, int nVersion)
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//
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// Support for ADD_SERIALIZE_METHODS and READWRITE macro
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//
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/**
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* Support for ADD_SERIALIZE_METHODS and READWRITE macro
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*/
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struct CSerActionSerialize
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{
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bool ForRead() const { return false; }
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