1375 lines
46 KiB
C++
1375 lines
46 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2012 The Bitcoin developers
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// Distributed under the MIT/X11 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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#define BITCOIN_SERIALIZE_H
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#include <string>
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#include <vector>
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#include <map>
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#include <set>
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#include <cassert>
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#include <limits>
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#include <cstring>
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#include <cstdio>
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#include <boost/type_traits/is_fundamental.hpp>
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#include <boost/tuple/tuple.hpp>
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#include <boost/tuple/tuple_comparison.hpp>
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#include <boost/tuple/tuple_io.hpp>
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#include "allocators.h"
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#include "version.h"
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typedef long long int64;
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typedef unsigned long long uint64;
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class CScript;
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class CDataStream;
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class CAutoFile;
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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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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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/////////////////////////////////////////////////////////////////
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//
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// Templates for serializing to anything that looks like a stream,
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// i.e. anything that supports .read(char*, int) and .write(char*, int)
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//
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enum
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{
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// primary actions
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SER_NETWORK = (1 << 0),
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SER_DISK = (1 << 1),
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SER_GETHASH = (1 << 2),
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};
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#define IMPLEMENT_SERIALIZE(statements) \
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unsigned int GetSerializeSize(int nType, int nVersion) const \
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{ \
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CSerActionGetSerializeSize ser_action; \
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const bool fGetSize = true; \
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const bool fWrite = false; \
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const bool fRead = false; \
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unsigned int nSerSize = 0; \
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ser_streamplaceholder s; \
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assert(fGetSize||fWrite||fRead); /* suppress warning */ \
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s.nType = nType; \
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s.nVersion = nVersion; \
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{statements} \
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return nSerSize; \
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} \
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template<typename Stream> \
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void Serialize(Stream& s, int nType, int nVersion) const \
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{ \
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CSerActionSerialize ser_action; \
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const bool fGetSize = false; \
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const bool fWrite = true; \
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const bool fRead = false; \
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unsigned int nSerSize = 0; \
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assert(fGetSize||fWrite||fRead); /* suppress warning */ \
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{statements} \
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} \
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template<typename Stream> \
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void Unserialize(Stream& s, int nType, int nVersion) \
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{ \
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CSerActionUnserialize ser_action; \
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const bool fGetSize = false; \
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const bool fWrite = false; \
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const bool fRead = true; \
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unsigned int nSerSize = 0; \
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assert(fGetSize||fWrite||fRead); /* suppress warning */ \
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{statements} \
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}
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#define READWRITE(obj) (nSerSize += ::SerReadWrite(s, (obj), nType, nVersion, ser_action))
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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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inline unsigned int GetSerializeSize(char a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(signed char a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(unsigned char a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(signed short a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(unsigned short a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(signed int a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(unsigned int a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(signed long a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(unsigned long a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(int64 a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(uint64 a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(float a, int, int=0) { return sizeof(a); }
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inline unsigned int GetSerializeSize(double a, int, int=0) { return sizeof(a); }
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template<typename Stream> inline void Serialize(Stream& s, char a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, signed char a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, unsigned char a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, signed short a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, unsigned short a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, signed int a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, unsigned int a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, signed long a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, unsigned long a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, int64 a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, uint64 a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, float a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Serialize(Stream& s, double a, int, int=0) { WRITEDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, char& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, signed char& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, unsigned char& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, signed short& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, unsigned short& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, signed int& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, unsigned int& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, signed long& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, unsigned long& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, int64& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, uint64& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, float& a, int, int=0) { READDATA(s, a); }
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template<typename Stream> inline void Unserialize(Stream& s, double& a, int, int=0) { READDATA(s, a); }
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inline unsigned int GetSerializeSize(bool a, int, int=0) { return sizeof(char); }
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template<typename Stream> inline void Serialize(Stream& s, bool a, int, int=0) { char f=a; WRITEDATA(s, f); }
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template<typename Stream> inline void Unserialize(Stream& s, bool& a, int, int=0) { char f; READDATA(s, f); a=f; }
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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 nSize)
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{
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if (nSize < 253) return sizeof(unsigned char);
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else if (nSize <= std::numeric_limits<unsigned short>::max()) return sizeof(unsigned char) + sizeof(unsigned short);
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else if (nSize <= std::numeric_limits<unsigned int>::max()) return sizeof(unsigned char) + sizeof(unsigned int);
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else return sizeof(unsigned char) + sizeof(uint64);
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}
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template<typename Stream>
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void WriteCompactSize(Stream& os, uint64 nSize)
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{
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if (nSize < 253)
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{
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unsigned char chSize = nSize;
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WRITEDATA(os, chSize);
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}
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else if (nSize <= std::numeric_limits<unsigned short>::max())
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{
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unsigned char chSize = 253;
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unsigned short xSize = nSize;
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WRITEDATA(os, chSize);
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WRITEDATA(os, xSize);
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}
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else if (nSize <= std::numeric_limits<unsigned int>::max())
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{
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unsigned char chSize = 254;
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unsigned int xSize = nSize;
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WRITEDATA(os, chSize);
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WRITEDATA(os, xSize);
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}
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else
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{
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unsigned char chSize = 255;
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uint64 xSize = nSize;
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WRITEDATA(os, chSize);
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WRITEDATA(os, xSize);
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}
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return;
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}
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template<typename Stream>
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uint64 ReadCompactSize(Stream& is)
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{
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unsigned char chSize;
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READDATA(is, chSize);
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uint64 nSizeRet = 0;
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if (chSize < 253)
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{
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nSizeRet = chSize;
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}
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else if (chSize == 253)
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{
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unsigned short xSize;
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READDATA(is, xSize);
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nSizeRet = xSize;
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}
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else if (chSize == 254)
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{
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unsigned int xSize;
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READDATA(is, xSize);
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nSizeRet = xSize;
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}
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else
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{
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uint64 xSize;
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READDATA(is, xSize);
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nSizeRet = xSize;
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}
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if (nSizeRet > (uint64)MAX_SIZE)
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throw std::ios_base::failure("ReadCompactSize() : size too large");
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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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template<typename I>
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inline unsigned int GetSizeOfVarInt(I n)
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{
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int nRet = 0;
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while(true) {
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nRet++;
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if (n <= 0x7F)
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break;
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n = (n >> 7) - 1;
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}
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return nRet;
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}
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template<typename Stream, typename I>
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void WriteVarInt(Stream& os, I n)
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{
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unsigned char tmp[(sizeof(n)*8+6)/7];
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int len=0;
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while(true) {
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tmp[len] = (n & 0x7F) | (len ? 0x80 : 0x00);
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if (n <= 0x7F)
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break;
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n = (n >> 7) - 1;
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len++;
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}
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do {
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WRITEDATA(os, tmp[len]);
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} while(len--);
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}
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template<typename Stream, typename I>
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I ReadVarInt(Stream& is)
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{
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I n = 0;
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while(true) {
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unsigned char chData;
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READDATA(is, chData);
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n = (n << 7) | (chData & 0x7F);
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if (chData & 0x80)
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n++;
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else
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return n;
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}
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}
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#define FLATDATA(obj) REF(CFlatData((char*)&(obj), (char*)&(obj) + sizeof(obj)))
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#define VARINT(obj) REF(WrapVarInt(REF(obj)))
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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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protected:
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char* pbegin;
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char* pend;
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public:
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CFlatData(void* pbeginIn, void* pendIn) : pbegin((char*)pbeginIn), pend((char*)pendIn) { }
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char* begin() { return pbegin; }
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const char* begin() const { return pbegin; }
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char* end() { return pend; }
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const char* end() const { return pend; }
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unsigned int GetSerializeSize(int, int=0) const
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{
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return pend - pbegin;
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}
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template<typename Stream>
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void Serialize(Stream& s, int, int=0) const
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{
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s.write(pbegin, pend - pbegin);
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}
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template<typename Stream>
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void Unserialize(Stream& s, int, int=0)
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{
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s.read(pbegin, pend - pbegin);
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}
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};
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template<typename I>
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class CVarInt
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{
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protected:
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I &n;
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public:
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CVarInt(I& nIn) : n(nIn) { }
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unsigned int GetSerializeSize(int, int) const {
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return GetSizeOfVarInt<I>(n);
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}
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template<typename Stream>
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void Serialize(Stream &s, int, int) const {
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WriteVarInt<Stream,I>(s, n);
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}
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template<typename Stream>
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void Unserialize(Stream& s, int, int) {
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n = ReadVarInt<Stream,I>(s);
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}
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};
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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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// string
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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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template<typename T, typename A> unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&);
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template<typename T, typename A> unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&);
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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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template<typename Stream, typename T, typename A> void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&);
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template<typename Stream, typename T, typename A> void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&);
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template<typename Stream, typename T, typename A> inline void Serialize(Stream& os, const std::vector<T, A>& v, int nType, int nVersion);
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template<typename Stream, typename T, typename A> void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&);
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template<typename Stream, typename T, typename A> void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&);
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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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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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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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// 3 tuple
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template<typename T0, typename T1, typename T2> unsigned int GetSerializeSize(const boost::tuple<T0, T1, T2>& item, int nType, int nVersion);
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template<typename Stream, typename T0, typename T1, typename T2> void Serialize(Stream& os, const boost::tuple<T0, T1, T2>& item, int nType, int nVersion);
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template<typename Stream, typename T0, typename T1, typename T2> void Unserialize(Stream& is, boost::tuple<T0, T1, T2>& item, int nType, int nVersion);
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// 4 tuple
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template<typename T0, typename T1, typename T2, typename T3> unsigned int GetSerializeSize(const boost::tuple<T0, T1, T2, T3>& item, int nType, int nVersion);
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template<typename Stream, typename T0, typename T1, typename T2, typename T3> void Serialize(Stream& os, const boost::tuple<T0, T1, T2, T3>& item, int nType, int nVersion);
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template<typename Stream, typename T0, typename T1, typename T2, typename T3> void Unserialize(Stream& is, boost::tuple<T0, T1, T2, T3>& item, int nType, int nVersion);
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// map
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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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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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//
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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.
|
|
// The compiler will only cast int to long if none of the other templates matched.
|
|
// Thanks to Boost serialization for this idea.
|
|
//
|
|
template<typename T>
|
|
inline unsigned int GetSerializeSize(const T& a, long nType, int nVersion)
|
|
{
|
|
return a.GetSerializeSize((int)nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream, typename T>
|
|
inline void Serialize(Stream& os, const T& a, long nType, int nVersion)
|
|
{
|
|
a.Serialize(os, (int)nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream, typename T>
|
|
inline void Unserialize(Stream& is, T& a, long nType, int nVersion)
|
|
{
|
|
a.Unserialize(is, (int)nType, nVersion);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// string
|
|
//
|
|
template<typename C>
|
|
unsigned int GetSerializeSize(const std::basic_string<C>& str, int, int)
|
|
{
|
|
return GetSizeOfCompactSize(str.size()) + str.size() * sizeof(str[0]);
|
|
}
|
|
|
|
template<typename Stream, typename C>
|
|
void Serialize(Stream& os, const std::basic_string<C>& str, int, int)
|
|
{
|
|
WriteCompactSize(os, str.size());
|
|
if (!str.empty())
|
|
os.write((char*)&str[0], str.size() * sizeof(str[0]));
|
|
}
|
|
|
|
template<typename Stream, typename C>
|
|
void Unserialize(Stream& is, std::basic_string<C>& str, int, int)
|
|
{
|
|
unsigned int nSize = ReadCompactSize(is);
|
|
str.resize(nSize);
|
|
if (nSize != 0)
|
|
is.read((char*)&str[0], nSize * sizeof(str[0]));
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// vector
|
|
//
|
|
template<typename T, typename A>
|
|
unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&)
|
|
{
|
|
return (GetSizeOfCompactSize(v.size()) + v.size() * sizeof(T));
|
|
}
|
|
|
|
template<typename T, typename A>
|
|
unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&)
|
|
{
|
|
unsigned int nSize = GetSizeOfCompactSize(v.size());
|
|
for (typename std::vector<T, A>::const_iterator vi = v.begin(); vi != v.end(); ++vi)
|
|
nSize += GetSerializeSize((*vi), nType, nVersion);
|
|
return nSize;
|
|
}
|
|
|
|
template<typename T, typename A>
|
|
inline unsigned int GetSerializeSize(const std::vector<T, A>& v, int nType, int nVersion)
|
|
{
|
|
return GetSerializeSize_impl(v, nType, nVersion, boost::is_fundamental<T>());
|
|
}
|
|
|
|
|
|
template<typename Stream, typename T, typename A>
|
|
void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&)
|
|
{
|
|
WriteCompactSize(os, v.size());
|
|
if (!v.empty())
|
|
os.write((char*)&v[0], v.size() * sizeof(T));
|
|
}
|
|
|
|
template<typename Stream, typename T, typename A>
|
|
void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&)
|
|
{
|
|
WriteCompactSize(os, v.size());
|
|
for (typename std::vector<T, A>::const_iterator vi = v.begin(); vi != v.end(); ++vi)
|
|
::Serialize(os, (*vi), nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream, typename T, typename A>
|
|
inline void Serialize(Stream& os, const std::vector<T, A>& v, int nType, int nVersion)
|
|
{
|
|
Serialize_impl(os, v, nType, nVersion, boost::is_fundamental<T>());
|
|
}
|
|
|
|
|
|
template<typename Stream, typename T, typename A>
|
|
void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&)
|
|
{
|
|
// Limit size per read so bogus size value won't cause out of memory
|
|
v.clear();
|
|
unsigned int nSize = ReadCompactSize(is);
|
|
unsigned int i = 0;
|
|
while (i < nSize)
|
|
{
|
|
unsigned int blk = std::min(nSize - i, (unsigned int)(1 + 4999999 / sizeof(T)));
|
|
v.resize(i + blk);
|
|
is.read((char*)&v[i], blk * sizeof(T));
|
|
i += blk;
|
|
}
|
|
}
|
|
|
|
template<typename Stream, typename T, typename A>
|
|
void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&)
|
|
{
|
|
v.clear();
|
|
unsigned int nSize = ReadCompactSize(is);
|
|
unsigned int i = 0;
|
|
unsigned int nMid = 0;
|
|
while (nMid < nSize)
|
|
{
|
|
nMid += 5000000 / sizeof(T);
|
|
if (nMid > nSize)
|
|
nMid = nSize;
|
|
v.resize(nMid);
|
|
for (; i < nMid; i++)
|
|
Unserialize(is, v[i], nType, nVersion);
|
|
}
|
|
}
|
|
|
|
template<typename Stream, typename T, typename A>
|
|
inline void Unserialize(Stream& is, std::vector<T, A>& v, int nType, int nVersion)
|
|
{
|
|
Unserialize_impl(is, v, nType, nVersion, boost::is_fundamental<T>());
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// others derived from vector
|
|
//
|
|
inline unsigned int GetSerializeSize(const CScript& v, int nType, int nVersion)
|
|
{
|
|
return GetSerializeSize((const std::vector<unsigned char>&)v, nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream>
|
|
void Serialize(Stream& os, const CScript& v, int nType, int nVersion)
|
|
{
|
|
Serialize(os, (const std::vector<unsigned char>&)v, nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream>
|
|
void Unserialize(Stream& is, CScript& v, int nType, int nVersion)
|
|
{
|
|
Unserialize(is, (std::vector<unsigned char>&)v, nType, nVersion);
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// pair
|
|
//
|
|
template<typename K, typename T>
|
|
unsigned int GetSerializeSize(const std::pair<K, T>& item, int nType, int nVersion)
|
|
{
|
|
return GetSerializeSize(item.first, nType, nVersion) + GetSerializeSize(item.second, nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream, typename K, typename T>
|
|
void Serialize(Stream& os, const std::pair<K, T>& item, int nType, int nVersion)
|
|
{
|
|
Serialize(os, item.first, nType, nVersion);
|
|
Serialize(os, item.second, nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream, typename K, typename T>
|
|
void Unserialize(Stream& is, std::pair<K, T>& item, int nType, int nVersion)
|
|
{
|
|
Unserialize(is, item.first, nType, nVersion);
|
|
Unserialize(is, item.second, nType, nVersion);
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// 3 tuple
|
|
//
|
|
template<typename T0, typename T1, typename T2>
|
|
unsigned int GetSerializeSize(const boost::tuple<T0, T1, T2>& item, int nType, int nVersion)
|
|
{
|
|
unsigned int nSize = 0;
|
|
nSize += GetSerializeSize(boost::get<0>(item), nType, nVersion);
|
|
nSize += GetSerializeSize(boost::get<1>(item), nType, nVersion);
|
|
nSize += GetSerializeSize(boost::get<2>(item), nType, nVersion);
|
|
return nSize;
|
|
}
|
|
|
|
template<typename Stream, typename T0, typename T1, typename T2>
|
|
void Serialize(Stream& os, const boost::tuple<T0, T1, T2>& item, int nType, int nVersion)
|
|
{
|
|
Serialize(os, boost::get<0>(item), nType, nVersion);
|
|
Serialize(os, boost::get<1>(item), nType, nVersion);
|
|
Serialize(os, boost::get<2>(item), nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream, typename T0, typename T1, typename T2>
|
|
void Unserialize(Stream& is, boost::tuple<T0, T1, T2>& item, int nType, int nVersion)
|
|
{
|
|
Unserialize(is, boost::get<0>(item), nType, nVersion);
|
|
Unserialize(is, boost::get<1>(item), nType, nVersion);
|
|
Unserialize(is, boost::get<2>(item), nType, nVersion);
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// 4 tuple
|
|
//
|
|
template<typename T0, typename T1, typename T2, typename T3>
|
|
unsigned int GetSerializeSize(const boost::tuple<T0, T1, T2, T3>& item, int nType, int nVersion)
|
|
{
|
|
unsigned int nSize = 0;
|
|
nSize += GetSerializeSize(boost::get<0>(item), nType, nVersion);
|
|
nSize += GetSerializeSize(boost::get<1>(item), nType, nVersion);
|
|
nSize += GetSerializeSize(boost::get<2>(item), nType, nVersion);
|
|
nSize += GetSerializeSize(boost::get<3>(item), nType, nVersion);
|
|
return nSize;
|
|
}
|
|
|
|
template<typename Stream, typename T0, typename T1, typename T2, typename T3>
|
|
void Serialize(Stream& os, const boost::tuple<T0, T1, T2, T3>& item, int nType, int nVersion)
|
|
{
|
|
Serialize(os, boost::get<0>(item), nType, nVersion);
|
|
Serialize(os, boost::get<1>(item), nType, nVersion);
|
|
Serialize(os, boost::get<2>(item), nType, nVersion);
|
|
Serialize(os, boost::get<3>(item), nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream, typename T0, typename T1, typename T2, typename T3>
|
|
void Unserialize(Stream& is, boost::tuple<T0, T1, T2, T3>& item, int nType, int nVersion)
|
|
{
|
|
Unserialize(is, boost::get<0>(item), nType, nVersion);
|
|
Unserialize(is, boost::get<1>(item), nType, nVersion);
|
|
Unserialize(is, boost::get<2>(item), nType, nVersion);
|
|
Unserialize(is, boost::get<3>(item), nType, nVersion);
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// map
|
|
//
|
|
template<typename K, typename T, typename Pred, typename A>
|
|
unsigned int GetSerializeSize(const std::map<K, T, Pred, A>& m, int nType, int nVersion)
|
|
{
|
|
unsigned int nSize = GetSizeOfCompactSize(m.size());
|
|
for (typename std::map<K, T, Pred, A>::const_iterator mi = m.begin(); mi != m.end(); ++mi)
|
|
nSize += GetSerializeSize((*mi), nType, nVersion);
|
|
return nSize;
|
|
}
|
|
|
|
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)
|
|
{
|
|
WriteCompactSize(os, m.size());
|
|
for (typename std::map<K, T, Pred, A>::const_iterator mi = m.begin(); mi != m.end(); ++mi)
|
|
Serialize(os, (*mi), nType, nVersion);
|
|
}
|
|
|
|
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)
|
|
{
|
|
m.clear();
|
|
unsigned int nSize = ReadCompactSize(is);
|
|
typename std::map<K, T, Pred, A>::iterator mi = m.begin();
|
|
for (unsigned int i = 0; i < nSize; i++)
|
|
{
|
|
std::pair<K, T> item;
|
|
Unserialize(is, item, nType, nVersion);
|
|
mi = m.insert(mi, item);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// set
|
|
//
|
|
template<typename K, typename Pred, typename A>
|
|
unsigned int GetSerializeSize(const std::set<K, Pred, A>& m, int nType, int nVersion)
|
|
{
|
|
unsigned int nSize = GetSizeOfCompactSize(m.size());
|
|
for (typename std::set<K, Pred, A>::const_iterator it = m.begin(); it != m.end(); ++it)
|
|
nSize += GetSerializeSize((*it), nType, nVersion);
|
|
return nSize;
|
|
}
|
|
|
|
template<typename Stream, typename K, typename Pred, typename A>
|
|
void Serialize(Stream& os, const std::set<K, Pred, A>& m, int nType, int nVersion)
|
|
{
|
|
WriteCompactSize(os, m.size());
|
|
for (typename std::set<K, Pred, A>::const_iterator it = m.begin(); it != m.end(); ++it)
|
|
Serialize(os, (*it), nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream, typename K, typename Pred, typename A>
|
|
void Unserialize(Stream& is, std::set<K, Pred, A>& m, int nType, int nVersion)
|
|
{
|
|
m.clear();
|
|
unsigned int nSize = ReadCompactSize(is);
|
|
typename std::set<K, Pred, A>::iterator it = m.begin();
|
|
for (unsigned int i = 0; i < nSize; i++)
|
|
{
|
|
K key;
|
|
Unserialize(is, key, nType, nVersion);
|
|
it = m.insert(it, key);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// Support for IMPLEMENT_SERIALIZE and READWRITE macro
|
|
//
|
|
class CSerActionGetSerializeSize { };
|
|
class CSerActionSerialize { };
|
|
class CSerActionUnserialize { };
|
|
|
|
template<typename Stream, typename T>
|
|
inline unsigned int SerReadWrite(Stream& s, const T& obj, int nType, int nVersion, CSerActionGetSerializeSize ser_action)
|
|
{
|
|
return ::GetSerializeSize(obj, nType, nVersion);
|
|
}
|
|
|
|
template<typename Stream, typename T>
|
|
inline unsigned int SerReadWrite(Stream& s, const T& obj, int nType, int nVersion, CSerActionSerialize ser_action)
|
|
{
|
|
::Serialize(s, obj, nType, nVersion);
|
|
return 0;
|
|
}
|
|
|
|
template<typename Stream, typename T>
|
|
inline unsigned int SerReadWrite(Stream& s, T& obj, int nType, int nVersion, CSerActionUnserialize ser_action)
|
|
{
|
|
::Unserialize(s, obj, nType, nVersion);
|
|
return 0;
|
|
}
|
|
|
|
struct ser_streamplaceholder
|
|
{
|
|
int nType;
|
|
int nVersion;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
typedef std::vector<char, zero_after_free_allocator<char> > CSerializeData;
|
|
|
|
/** Double ended buffer combining vector and stream-like interfaces.
|
|
*
|
|
* >> and << read and write unformatted data using the above serialization templates.
|
|
* Fills with data in linear time; some stringstream implementations take N^2 time.
|
|
*/
|
|
class CDataStream
|
|
{
|
|
protected:
|
|
typedef CSerializeData vector_type;
|
|
vector_type vch;
|
|
unsigned int nReadPos;
|
|
short state;
|
|
short exceptmask;
|
|
public:
|
|
int nType;
|
|
int nVersion;
|
|
|
|
typedef vector_type::allocator_type allocator_type;
|
|
typedef vector_type::size_type size_type;
|
|
typedef vector_type::difference_type difference_type;
|
|
typedef vector_type::reference reference;
|
|
typedef vector_type::const_reference const_reference;
|
|
typedef vector_type::value_type value_type;
|
|
typedef vector_type::iterator iterator;
|
|
typedef vector_type::const_iterator const_iterator;
|
|
typedef vector_type::reverse_iterator reverse_iterator;
|
|
|
|
explicit CDataStream(int nTypeIn, int nVersionIn)
|
|
{
|
|
Init(nTypeIn, nVersionIn);
|
|
}
|
|
|
|
CDataStream(const_iterator pbegin, const_iterator pend, int nTypeIn, int nVersionIn) : vch(pbegin, pend)
|
|
{
|
|
Init(nTypeIn, nVersionIn);
|
|
}
|
|
|
|
#if !defined(_MSC_VER) || _MSC_VER >= 1300
|
|
CDataStream(const char* pbegin, const char* pend, int nTypeIn, int nVersionIn) : vch(pbegin, pend)
|
|
{
|
|
Init(nTypeIn, nVersionIn);
|
|
}
|
|
#endif
|
|
|
|
CDataStream(const vector_type& vchIn, int nTypeIn, int nVersionIn) : vch(vchIn.begin(), vchIn.end())
|
|
{
|
|
Init(nTypeIn, nVersionIn);
|
|
}
|
|
|
|
CDataStream(const std::vector<char>& vchIn, int nTypeIn, int nVersionIn) : vch(vchIn.begin(), vchIn.end())
|
|
{
|
|
Init(nTypeIn, nVersionIn);
|
|
}
|
|
|
|
CDataStream(const std::vector<unsigned char>& vchIn, int nTypeIn, int nVersionIn) : vch((char*)&vchIn.begin()[0], (char*)&vchIn.end()[0])
|
|
{
|
|
Init(nTypeIn, nVersionIn);
|
|
}
|
|
|
|
void Init(int nTypeIn, int nVersionIn)
|
|
{
|
|
nReadPos = 0;
|
|
nType = nTypeIn;
|
|
nVersion = nVersionIn;
|
|
state = 0;
|
|
exceptmask = std::ios::badbit | std::ios::failbit;
|
|
}
|
|
|
|
CDataStream& operator+=(const CDataStream& b)
|
|
{
|
|
vch.insert(vch.end(), b.begin(), b.end());
|
|
return *this;
|
|
}
|
|
|
|
friend CDataStream operator+(const CDataStream& a, const CDataStream& b)
|
|
{
|
|
CDataStream ret = a;
|
|
ret += b;
|
|
return (ret);
|
|
}
|
|
|
|
std::string str() const
|
|
{
|
|
return (std::string(begin(), end()));
|
|
}
|
|
|
|
|
|
//
|
|
// Vector subset
|
|
//
|
|
const_iterator begin() const { return vch.begin() + nReadPos; }
|
|
iterator begin() { return vch.begin() + nReadPos; }
|
|
const_iterator end() const { return vch.end(); }
|
|
iterator end() { return vch.end(); }
|
|
size_type size() const { return vch.size() - nReadPos; }
|
|
bool empty() const { return vch.size() == nReadPos; }
|
|
void resize(size_type n, value_type c=0) { vch.resize(n + nReadPos, c); }
|
|
void reserve(size_type n) { vch.reserve(n + nReadPos); }
|
|
const_reference operator[](size_type pos) const { return vch[pos + nReadPos]; }
|
|
reference operator[](size_type pos) { return vch[pos + nReadPos]; }
|
|
void clear() { vch.clear(); nReadPos = 0; }
|
|
iterator insert(iterator it, const char& x=char()) { return vch.insert(it, x); }
|
|
void insert(iterator it, size_type n, const char& x) { vch.insert(it, n, x); }
|
|
|
|
void insert(iterator it, const_iterator first, const_iterator last)
|
|
{
|
|
assert(last - first >= 0);
|
|
if (it == vch.begin() + nReadPos && (unsigned int)(last - first) <= nReadPos)
|
|
{
|
|
// special case for inserting at the front when there's room
|
|
nReadPos -= (last - first);
|
|
memcpy(&vch[nReadPos], &first[0], last - first);
|
|
}
|
|
else
|
|
vch.insert(it, first, last);
|
|
}
|
|
|
|
void insert(iterator it, std::vector<char>::const_iterator first, std::vector<char>::const_iterator last)
|
|
{
|
|
assert(last - first >= 0);
|
|
if (it == vch.begin() + nReadPos && (unsigned int)(last - first) <= nReadPos)
|
|
{
|
|
// special case for inserting at the front when there's room
|
|
nReadPos -= (last - first);
|
|
memcpy(&vch[nReadPos], &first[0], last - first);
|
|
}
|
|
else
|
|
vch.insert(it, first, last);
|
|
}
|
|
|
|
#if !defined(_MSC_VER) || _MSC_VER >= 1300
|
|
void insert(iterator it, const char* first, const char* last)
|
|
{
|
|
assert(last - first >= 0);
|
|
if (it == vch.begin() + nReadPos && (unsigned int)(last - first) <= nReadPos)
|
|
{
|
|
// special case for inserting at the front when there's room
|
|
nReadPos -= (last - first);
|
|
memcpy(&vch[nReadPos], &first[0], last - first);
|
|
}
|
|
else
|
|
vch.insert(it, first, last);
|
|
}
|
|
#endif
|
|
|
|
iterator erase(iterator it)
|
|
{
|
|
if (it == vch.begin() + nReadPos)
|
|
{
|
|
// special case for erasing from the front
|
|
if (++nReadPos >= vch.size())
|
|
{
|
|
// whenever we reach the end, we take the opportunity to clear the buffer
|
|
nReadPos = 0;
|
|
return vch.erase(vch.begin(), vch.end());
|
|
}
|
|
return vch.begin() + nReadPos;
|
|
}
|
|
else
|
|
return vch.erase(it);
|
|
}
|
|
|
|
iterator erase(iterator first, iterator last)
|
|
{
|
|
if (first == vch.begin() + nReadPos)
|
|
{
|
|
// special case for erasing from the front
|
|
if (last == vch.end())
|
|
{
|
|
nReadPos = 0;
|
|
return vch.erase(vch.begin(), vch.end());
|
|
}
|
|
else
|
|
{
|
|
nReadPos = (last - vch.begin());
|
|
return last;
|
|
}
|
|
}
|
|
else
|
|
return vch.erase(first, last);
|
|
}
|
|
|
|
inline void Compact()
|
|
{
|
|
vch.erase(vch.begin(), vch.begin() + nReadPos);
|
|
nReadPos = 0;
|
|
}
|
|
|
|
bool Rewind(size_type n)
|
|
{
|
|
// Rewind by n characters if the buffer hasn't been compacted yet
|
|
if (n > nReadPos)
|
|
return false;
|
|
nReadPos -= n;
|
|
return true;
|
|
}
|
|
|
|
|
|
//
|
|
// Stream subset
|
|
//
|
|
void setstate(short bits, const char* psz)
|
|
{
|
|
state |= bits;
|
|
if (state & exceptmask)
|
|
throw std::ios_base::failure(psz);
|
|
}
|
|
|
|
bool eof() const { return size() == 0; }
|
|
bool fail() const { return state & (std::ios::badbit | std::ios::failbit); }
|
|
bool good() const { return !eof() && (state == 0); }
|
|
void clear(short n) { state = n; } // name conflict with vector clear()
|
|
short exceptions() { return exceptmask; }
|
|
short exceptions(short mask) { short prev = exceptmask; exceptmask = mask; setstate(0, "CDataStream"); return prev; }
|
|
CDataStream* rdbuf() { return this; }
|
|
int in_avail() { return size(); }
|
|
|
|
void SetType(int n) { nType = n; }
|
|
int GetType() { return nType; }
|
|
void SetVersion(int n) { nVersion = n; }
|
|
int GetVersion() { return nVersion; }
|
|
void ReadVersion() { *this >> nVersion; }
|
|
void WriteVersion() { *this << nVersion; }
|
|
|
|
CDataStream& read(char* pch, int nSize)
|
|
{
|
|
// Read from the beginning of the buffer
|
|
assert(nSize >= 0);
|
|
unsigned int nReadPosNext = nReadPos + nSize;
|
|
if (nReadPosNext >= vch.size())
|
|
{
|
|
if (nReadPosNext > vch.size())
|
|
{
|
|
setstate(std::ios::failbit, "CDataStream::read() : end of data");
|
|
memset(pch, 0, nSize);
|
|
nSize = vch.size() - nReadPos;
|
|
}
|
|
memcpy(pch, &vch[nReadPos], nSize);
|
|
nReadPos = 0;
|
|
vch.clear();
|
|
return (*this);
|
|
}
|
|
memcpy(pch, &vch[nReadPos], nSize);
|
|
nReadPos = nReadPosNext;
|
|
return (*this);
|
|
}
|
|
|
|
CDataStream& ignore(int nSize)
|
|
{
|
|
// Ignore from the beginning of the buffer
|
|
assert(nSize >= 0);
|
|
unsigned int nReadPosNext = nReadPos + nSize;
|
|
if (nReadPosNext >= vch.size())
|
|
{
|
|
if (nReadPosNext > vch.size())
|
|
{
|
|
setstate(std::ios::failbit, "CDataStream::ignore() : end of data");
|
|
nSize = vch.size() - nReadPos;
|
|
}
|
|
nReadPos = 0;
|
|
vch.clear();
|
|
return (*this);
|
|
}
|
|
nReadPos = nReadPosNext;
|
|
return (*this);
|
|
}
|
|
|
|
CDataStream& write(const char* pch, int nSize)
|
|
{
|
|
// Write to the end of the buffer
|
|
assert(nSize >= 0);
|
|
vch.insert(vch.end(), pch, pch + nSize);
|
|
return (*this);
|
|
}
|
|
|
|
template<typename Stream>
|
|
void Serialize(Stream& s, int nType, int nVersion) const
|
|
{
|
|
// Special case: stream << stream concatenates like stream += stream
|
|
if (!vch.empty())
|
|
s.write((char*)&vch[0], vch.size() * sizeof(vch[0]));
|
|
}
|
|
|
|
template<typename T>
|
|
unsigned int GetSerializeSize(const T& obj)
|
|
{
|
|
// Tells the size of the object if serialized to this stream
|
|
return ::GetSerializeSize(obj, nType, nVersion);
|
|
}
|
|
|
|
template<typename T>
|
|
CDataStream& operator<<(const T& obj)
|
|
{
|
|
// Serialize to this stream
|
|
::Serialize(*this, obj, nType, nVersion);
|
|
return (*this);
|
|
}
|
|
|
|
template<typename T>
|
|
CDataStream& operator>>(T& obj)
|
|
{
|
|
// Unserialize from this stream
|
|
::Unserialize(*this, obj, nType, nVersion);
|
|
return (*this);
|
|
}
|
|
|
|
void GetAndClear(CSerializeData &data) {
|
|
vch.swap(data);
|
|
CSerializeData().swap(vch);
|
|
}
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/** RAII wrapper for FILE*.
|
|
*
|
|
* Will automatically close the file when it goes out of scope if not null.
|
|
* If you're returning the file pointer, return file.release().
|
|
* If you need to close the file early, use file.fclose() instead of fclose(file).
|
|
*/
|
|
class CAutoFile
|
|
{
|
|
protected:
|
|
FILE* file;
|
|
short state;
|
|
short exceptmask;
|
|
public:
|
|
int nType;
|
|
int nVersion;
|
|
|
|
CAutoFile(FILE* filenew, int nTypeIn, int nVersionIn)
|
|
{
|
|
file = filenew;
|
|
nType = nTypeIn;
|
|
nVersion = nVersionIn;
|
|
state = 0;
|
|
exceptmask = std::ios::badbit | std::ios::failbit;
|
|
}
|
|
|
|
~CAutoFile()
|
|
{
|
|
fclose();
|
|
}
|
|
|
|
void fclose()
|
|
{
|
|
if (file != NULL && file != stdin && file != stdout && file != stderr)
|
|
::fclose(file);
|
|
file = NULL;
|
|
}
|
|
|
|
FILE* release() { FILE* ret = file; file = NULL; return ret; }
|
|
operator FILE*() { return file; }
|
|
FILE* operator->() { return file; }
|
|
FILE& operator*() { return *file; }
|
|
FILE** operator&() { return &file; }
|
|
FILE* operator=(FILE* pnew) { return file = pnew; }
|
|
bool operator!() { return (file == NULL); }
|
|
|
|
|
|
//
|
|
// Stream subset
|
|
//
|
|
void setstate(short bits, const char* psz)
|
|
{
|
|
state |= bits;
|
|
if (state & exceptmask)
|
|
throw std::ios_base::failure(psz);
|
|
}
|
|
|
|
bool fail() const { return state & (std::ios::badbit | std::ios::failbit); }
|
|
bool good() const { return state == 0; }
|
|
void clear(short n = 0) { state = n; }
|
|
short exceptions() { return exceptmask; }
|
|
short exceptions(short mask) { short prev = exceptmask; exceptmask = mask; setstate(0, "CAutoFile"); return prev; }
|
|
|
|
void SetType(int n) { nType = n; }
|
|
int GetType() { return nType; }
|
|
void SetVersion(int n) { nVersion = n; }
|
|
int GetVersion() { return nVersion; }
|
|
void ReadVersion() { *this >> nVersion; }
|
|
void WriteVersion() { *this << nVersion; }
|
|
|
|
CAutoFile& read(char* pch, size_t nSize)
|
|
{
|
|
if (!file)
|
|
throw std::ios_base::failure("CAutoFile::read : file handle is NULL");
|
|
if (fread(pch, 1, nSize, file) != nSize)
|
|
setstate(std::ios::failbit, feof(file) ? "CAutoFile::read : end of file" : "CAutoFile::read : fread failed");
|
|
return (*this);
|
|
}
|
|
|
|
CAutoFile& write(const char* pch, size_t nSize)
|
|
{
|
|
if (!file)
|
|
throw std::ios_base::failure("CAutoFile::write : file handle is NULL");
|
|
if (fwrite(pch, 1, nSize, file) != nSize)
|
|
setstate(std::ios::failbit, "CAutoFile::write : write failed");
|
|
return (*this);
|
|
}
|
|
|
|
template<typename T>
|
|
unsigned int GetSerializeSize(const T& obj)
|
|
{
|
|
// Tells the size of the object if serialized to this stream
|
|
return ::GetSerializeSize(obj, nType, nVersion);
|
|
}
|
|
|
|
template<typename T>
|
|
CAutoFile& operator<<(const T& obj)
|
|
{
|
|
// Serialize to this stream
|
|
if (!file)
|
|
throw std::ios_base::failure("CAutoFile::operator<< : file handle is NULL");
|
|
::Serialize(*this, obj, nType, nVersion);
|
|
return (*this);
|
|
}
|
|
|
|
template<typename T>
|
|
CAutoFile& operator>>(T& obj)
|
|
{
|
|
// Unserialize from this stream
|
|
if (!file)
|
|
throw std::ios_base::failure("CAutoFile::operator>> : file handle is NULL");
|
|
::Unserialize(*this, obj, nType, nVersion);
|
|
return (*this);
|
|
}
|
|
};
|
|
|
|
/** Wrapper around a FILE* that implements a ring buffer to
|
|
* deserialize from. It guarantees the ability to rewind
|
|
* a given number of bytes. */
|
|
class CBufferedFile
|
|
{
|
|
private:
|
|
FILE *src; // source file
|
|
uint64 nSrcPos; // how many bytes have been read from source
|
|
uint64 nReadPos; // how many bytes have been read from this
|
|
uint64 nReadLimit; // up to which position we're allowed to read
|
|
uint64 nRewind; // how many bytes we guarantee to rewind
|
|
std::vector<char> vchBuf; // the buffer
|
|
|
|
short state;
|
|
short exceptmask;
|
|
|
|
protected:
|
|
void setstate(short bits, const char *psz) {
|
|
state |= bits;
|
|
if (state & exceptmask)
|
|
throw std::ios_base::failure(psz);
|
|
}
|
|
|
|
// read data from the source to fill the buffer
|
|
bool Fill() {
|
|
unsigned int pos = nSrcPos % vchBuf.size();
|
|
unsigned int readNow = vchBuf.size() - pos;
|
|
unsigned int nAvail = vchBuf.size() - (nSrcPos - nReadPos) - nRewind;
|
|
if (nAvail < readNow)
|
|
readNow = nAvail;
|
|
if (readNow == 0)
|
|
return false;
|
|
size_t read = fread((void*)&vchBuf[pos], 1, readNow, src);
|
|
if (read == 0) {
|
|
setstate(std::ios_base::failbit, feof(src) ? "CBufferedFile::Fill : end of file" : "CBufferedFile::Fill : fread failed");
|
|
return false;
|
|
} else {
|
|
nSrcPos += read;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
public:
|
|
int nType;
|
|
int nVersion;
|
|
|
|
CBufferedFile(FILE *fileIn, uint64 nBufSize, uint64 nRewindIn, int nTypeIn, int nVersionIn) :
|
|
src(fileIn), nSrcPos(0), nReadPos(0), nReadLimit((uint64)(-1)), nRewind(nRewindIn), vchBuf(nBufSize, 0),
|
|
state(0), exceptmask(std::ios_base::badbit | std::ios_base::failbit), nType(nTypeIn), nVersion(nVersionIn) {
|
|
}
|
|
|
|
// check whether no error occurred
|
|
bool good() const {
|
|
return state == 0;
|
|
}
|
|
|
|
// check whether we're at the end of the source file
|
|
bool eof() const {
|
|
return nReadPos == nSrcPos && feof(src);
|
|
}
|
|
|
|
// read a number of bytes
|
|
CBufferedFile& read(char *pch, size_t nSize) {
|
|
if (nSize + nReadPos > nReadLimit)
|
|
throw std::ios_base::failure("Read attempted past buffer limit");
|
|
if (nSize + nRewind > vchBuf.size())
|
|
throw std::ios_base::failure("Read larger than buffer size");
|
|
while (nSize > 0) {
|
|
if (nReadPos == nSrcPos)
|
|
Fill();
|
|
unsigned int pos = nReadPos % vchBuf.size();
|
|
size_t nNow = nSize;
|
|
if (nNow + pos > vchBuf.size())
|
|
nNow = vchBuf.size() - pos;
|
|
if (nNow + nReadPos > nSrcPos)
|
|
nNow = nSrcPos - nReadPos;
|
|
memcpy(pch, &vchBuf[pos], nNow);
|
|
nReadPos += nNow;
|
|
pch += nNow;
|
|
nSize -= nNow;
|
|
}
|
|
return (*this);
|
|
}
|
|
|
|
// return the current reading position
|
|
uint64 GetPos() {
|
|
return nReadPos;
|
|
}
|
|
|
|
// rewind to a given reading position
|
|
bool SetPos(uint64 nPos) {
|
|
nReadPos = nPos;
|
|
if (nReadPos + nRewind < nSrcPos) {
|
|
nReadPos = nSrcPos - nRewind;
|
|
return false;
|
|
} else if (nReadPos > nSrcPos) {
|
|
nReadPos = nSrcPos;
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool Seek(uint64 nPos) {
|
|
long nLongPos = nPos;
|
|
if (nPos != (uint64)nLongPos)
|
|
return false;
|
|
if (fseek(src, nLongPos, SEEK_SET))
|
|
return false;
|
|
nLongPos = ftell(src);
|
|
nSrcPos = nLongPos;
|
|
nReadPos = nLongPos;
|
|
state = 0;
|
|
return true;
|
|
}
|
|
|
|
// prevent reading beyond a certain position
|
|
// no argument removes the limit
|
|
bool SetLimit(uint64 nPos = (uint64)(-1)) {
|
|
if (nPos < nReadPos)
|
|
return false;
|
|
nReadLimit = nPos;
|
|
return true;
|
|
}
|
|
|
|
template<typename T>
|
|
CBufferedFile& operator>>(T& obj) {
|
|
// Unserialize from this stream
|
|
::Unserialize(*this, obj, nType, nVersion);
|
|
return (*this);
|
|
}
|
|
|
|
// search for a given byte in the stream, and remain positioned on it
|
|
void FindByte(char ch) {
|
|
while (true) {
|
|
if (nReadPos == nSrcPos)
|
|
Fill();
|
|
if (vchBuf[nReadPos % vchBuf.size()] == ch)
|
|
break;
|
|
nReadPos++;
|
|
}
|
|
}
|
|
};
|
|
|
|
#endif
|