// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
-// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_SERIALIZE_H
#define BITCOIN_SERIALIZE_H
#include <map>
#include <set>
#include <cassert>
-#include <climits>
+#include <limits>
#include <cstring>
#include <cstdio>
#include <boost/tuple/tuple_comparison.hpp>
#include <boost/tuple/tuple_io.hpp>
-#if defined(_MSC_VER) || defined(__BORLANDC__)
-typedef __int64 int64;
-typedef unsigned __int64 uint64;
-#else
-typedef long long int64;
-typedef unsigned long long uint64;
-#endif
-#if defined(_MSC_VER) && _MSC_VER < 1300
-#define for if (false) ; else for
-#endif
+#include "allocators.h"
+#include "version.h"
-#ifdef WIN32
-#include <windows.h>
-// This is used to attempt to keep keying material out of swap
-// Note that VirtualLock does not provide this as a guarantee on Windows,
-// but, in practice, memory that has been VirtualLock'd almost never gets written to
-// the pagefile except in rare circumstances where memory is extremely low.
-#include <windows.h>
-#define mlock(p, n) VirtualLock((p), (n));
-#define munlock(p, n) VirtualUnlock((p), (n));
-#else
-#include <sys/mman.h>
-#include <limits.h>
-/* This comes from limits.h if it's not defined there set a sane default */
-#ifndef PAGESIZE
-#include <unistd.h>
-#define PAGESIZE sysconf(_SC_PAGESIZE)
-#endif
-#define mlock(a,b) \
- mlock(((void *)(((size_t)(a)) & (~((PAGESIZE)-1)))),\
- (((((size_t)(a)) + (b) - 1) | ((PAGESIZE) - 1)) + 1) - (((size_t)(a)) & (~((PAGESIZE) - 1))))
-#define munlock(a,b) \
- munlock(((void *)(((size_t)(a)) & (~((PAGESIZE)-1)))),\
- (((((size_t)(a)) + (b) - 1) | ((PAGESIZE) - 1)) + 1) - (((size_t)(a)) & (~((PAGESIZE) - 1))))
+#ifdef _MSC_VER
+#undef max
#endif
+typedef long long int64;
+typedef unsigned long long uint64;
+
class CScript;
class CDataStream;
class CAutoFile;
static const unsigned int MAX_SIZE = 0x02000000;
-static const int VERSION = 50600;
-static const char* pszSubVer = "";
-static const bool VERSION_IS_BETA = true;
-
// Used to bypass the rule against non-const reference to temporary
// where it makes sense with wrappers such as CFlatData or CTxDB
template<typename T>
SER_DISK = (1 << 1),
SER_GETHASH = (1 << 2),
- // modifiers
- SER_SKIPSIG = (1 << 16),
- SER_BLOCKHEADERONLY = (1 << 17),
+ // modifiers
+ SER_SKIPSIG = (1 << 16),
+ SER_BLOCKHEADERONLY = (1 << 17),
+
};
+#ifdef _MSC_VER
+#define IMPLEMENT_SERIALIZE(statements) \
+ unsigned int GetSerializeSize(int nType, int nVersion) const \
+ { \
+ CSerActionGetSerializeSize ser_action; \
+ const bool fGetSize = true; \
+ const bool fWrite = false; \
+ const bool fRead = false; \
+ unsigned int nSerSize = 0; \
+ ser_streamplaceholder s; \
+ assert(fGetSize||fWrite||fRead); /* suppress warning */ \
+ s.nType = nType; \
+ s.nVersion = nVersion; \
+ std::map<int, int> mapUnkIds; \
+ {statements} \
+ return nSerSize; \
+ } \
+ template<typename Stream> \
+ void Serialize(Stream& s, int nType, int nVersion) const \
+ { \
+ CSerActionSerialize ser_action; \
+ const bool fGetSize = false; \
+ const bool fWrite = true; \
+ const bool fRead = false; \
+ unsigned int nSerSize = 0; \
+ assert(fGetSize||fWrite||fRead); /* suppress warning */ \
+ std::map<int, int> mapUnkIds; \
+ {statements} \
+ } \
+ template<typename Stream> \
+ void Unserialize(Stream& s, int nType, int nVersion) \
+ { \
+ CSerActionUnserialize ser_action; \
+ const bool fGetSize = false; \
+ const bool fWrite = false; \
+ const bool fRead = true; \
+ unsigned int nSerSize = 0; \
+ std::map<int, int> mapUnkIds; \
+ assert(fGetSize||fWrite||fRead); /* suppress warning */ \
+ {statements} \
+ }
+
+#else
+
#define IMPLEMENT_SERIALIZE(statements) \
- unsigned int GetSerializeSize(int nType=0, int nVersion=VERSION) const \
+ unsigned int GetSerializeSize(int nType, int nVersion) const \
{ \
CSerActionGetSerializeSize ser_action; \
const bool fGetSize = true; \
return nSerSize; \
} \
template<typename Stream> \
- void Serialize(Stream& s, int nType=0, int nVersion=VERSION) const \
+ void Serialize(Stream& s, int nType, int nVersion) const \
{ \
CSerActionSerialize ser_action; \
const bool fGetSize = false; \
{statements} \
} \
template<typename Stream> \
- void Unserialize(Stream& s, int nType=0, int nVersion=VERSION) \
+ void Unserialize(Stream& s, int nType, int nVersion) \
{ \
CSerActionUnserialize ser_action; \
const bool fGetSize = false; \
{statements} \
}
+#endif
+
#define READWRITE(obj) (nSerSize += ::SerReadWrite(s, (obj), nType, nVersion, ser_action))
inline unsigned int GetSizeOfCompactSize(uint64 nSize)
{
if (nSize < 253) return sizeof(unsigned char);
- else if (nSize <= USHRT_MAX) return sizeof(unsigned char) + sizeof(unsigned short);
- else if (nSize <= UINT_MAX) return sizeof(unsigned char) + sizeof(unsigned int);
+ else if (nSize <= std::numeric_limits<unsigned short>::max()) return sizeof(unsigned char) + sizeof(unsigned short);
+ else if (nSize <= std::numeric_limits<unsigned int>::max()) return sizeof(unsigned char) + sizeof(unsigned int);
else return sizeof(unsigned char) + sizeof(uint64);
}
unsigned char chSize = nSize;
WRITEDATA(os, chSize);
}
- else if (nSize <= USHRT_MAX)
+ else if (nSize <= std::numeric_limits<unsigned short>::max())
{
unsigned char chSize = 253;
unsigned short xSize = nSize;
WRITEDATA(os, chSize);
WRITEDATA(os, xSize);
}
- else if (nSize <= UINT_MAX)
+ else if (nSize <= std::numeric_limits<unsigned int>::max())
{
unsigned char chSize = 254;
unsigned int xSize = nSize;
return nSizeRet;
}
-
-
+// Variable-length integers: bytes are a MSB base-128 encoding of the number.
+// The high bit in each byte signifies whether another digit follows. To make
+// the encoding is one-to-one, one is subtracted from all but the last digit.
+// Thus, the byte sequence a[] with length len, where all but the last byte
+// has bit 128 set, encodes the number:
+//
+// (a[len-1] & 0x7F) + sum(i=1..len-1, 128^i*((a[len-i-1] & 0x7F)+1))
//
-// Wrapper for serializing arrays and POD
-// There's a clever template way to make arrays serialize normally, but MSVC6 doesn't support it
+// Properties:
+// * Very small (0-127: 1 byte, 128-16511: 2 bytes, 16512-2113663: 3 bytes)
+// * Every integer has exactly one encoding
+// * Encoding does not depend on size of original integer type
+// * No redundancy: every (infinite) byte sequence corresponds to a list
+// of encoded integers.
//
-#define FLATDATA(obj) REF(CFlatData((char*)&(obj), (char*)&(obj) + sizeof(obj)))
+// 0: [0x00] 256: [0x81 0x00]
+// 1: [0x01] 16383: [0xFE 0x7F]
+// 127: [0x7F] 16384: [0xFF 0x00]
+// 128: [0x80 0x00] 16511: [0x80 0xFF 0x7F]
+// 255: [0x80 0x7F] 65535: [0x82 0xFD 0x7F]
+// 2^32: [0x8E 0xFE 0xFE 0xFF 0x00]
+
+template<typename I>
+inline unsigned int GetSizeOfVarInt(I n)
+{
+ int nRet = 0;
+ while(true) {
+ nRet++;
+ if (n <= 0x7F)
+ break;
+ n = (n >> 7) - 1;
+ }
+ return nRet;
+}
+
+template<typename Stream, typename I>
+void WriteVarInt(Stream& os, I n)
+{
+ unsigned char tmp[(sizeof(n)*8+6)/7];
+ int len=0;
+ while(true) {
+ tmp[len] = (n & 0x7F) | (len ? 0x80 : 0x00);
+ if (n <= 0x7F)
+ break;
+ n = (n >> 7) - 1;
+ len++;
+ }
+ do {
+ WRITEDATA(os, tmp[len]);
+ } while(len--);
+}
+
+template<typename Stream, typename I>
+I ReadVarInt(Stream& is)
+{
+ I n = 0;
+ while(true) {
+ unsigned char chData;
+ READDATA(is, chData);
+ n = (n << 7) | (chData & 0x7F);
+ if (chData & 0x80)
+ n++;
+ else
+ return n;
+ }
+}
+
+#define FLATDATA(obj) REF(CFlatData((char*)&(obj), (char*)&(obj) + sizeof(obj)))
+#define VARINT(obj) REF(WrapVarInt(REF(obj)))
+
+/** Wrapper for serializing arrays and POD.
+ */
class CFlatData
{
protected:
}
};
-
-
-//
-// string stored as a fixed length field
-//
-template<std::size_t LEN>
-class CFixedFieldString
+template<typename I>
+class CVarInt
{
protected:
- const std::string* pcstr;
- std::string* pstr;
+ I &n;
public:
- explicit CFixedFieldString(const std::string& str) : pcstr(&str), pstr(NULL) { }
- explicit CFixedFieldString(std::string& str) : pcstr(&str), pstr(&str) { }
+ CVarInt(I& nIn) : n(nIn) { }
- unsigned int GetSerializeSize(int, int=0) const
- {
- return LEN;
+ unsigned int GetSerializeSize(int, int) const {
+ return GetSizeOfVarInt<I>(n);
}
template<typename Stream>
- void Serialize(Stream& s, int, int=0) const
- {
- char pszBuf[LEN];
- strncpy(pszBuf, pcstr->c_str(), LEN);
- s.write(pszBuf, LEN);
+ void Serialize(Stream &s, int, int) const {
+ WriteVarInt<Stream,I>(s, n);
}
template<typename Stream>
- void Unserialize(Stream& s, int, int=0)
- {
- if (pstr == NULL)
- throw std::ios_base::failure("CFixedFieldString::Unserialize : trying to unserialize to const string");
- char pszBuf[LEN+1];
- s.read(pszBuf, LEN);
- pszBuf[LEN] = '\0';
- *pstr = pszBuf;
+ void Unserialize(Stream& s, int, int) {
+ n = ReadVarInt<Stream,I>(s);
}
};
-
-
-
+template<typename I>
+CVarInt<I> WrapVarInt(I& n) { return CVarInt<I>(n); }
//
// Forward declarations
// vector
template<typename T, typename A> unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&);
template<typename T, typename A> unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&);
-template<typename T, typename A> inline unsigned int GetSerializeSize(const std::vector<T, A>& v, int nType, int nVersion=VERSION);
+template<typename T, typename A> inline unsigned int GetSerializeSize(const std::vector<T, A>& v, int nType, int nVersion);
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&);
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&);
-template<typename Stream, typename T, typename A> inline void Serialize(Stream& os, const std::vector<T, A>& v, int nType, int nVersion=VERSION);
+template<typename Stream, typename T, typename A> inline void Serialize(Stream& os, const std::vector<T, A>& v, int nType, int nVersion);
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&);
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&);
-template<typename Stream, typename T, typename A> inline void Unserialize(Stream& is, std::vector<T, A>& v, int nType, int nVersion=VERSION);
+template<typename Stream, typename T, typename A> inline void Unserialize(Stream& is, std::vector<T, A>& v, int nType, int nVersion);
// others derived from vector
-extern inline unsigned int GetSerializeSize(const CScript& v, int nType, int nVersion=VERSION);
-template<typename Stream> void Serialize(Stream& os, const CScript& v, int nType, int nVersion=VERSION);
-template<typename Stream> void Unserialize(Stream& is, CScript& v, int nType, int nVersion=VERSION);
+extern inline unsigned int GetSerializeSize(const CScript& v, int nType, int nVersion);
+template<typename Stream> void Serialize(Stream& os, const CScript& v, int nType, int nVersion);
+template<typename Stream> void Unserialize(Stream& is, CScript& v, int nType, int nVersion);
// pair
-template<typename K, typename T> unsigned int GetSerializeSize(const std::pair<K, T>& item, int nType, int nVersion=VERSION);
-template<typename Stream, typename K, typename T> void Serialize(Stream& os, const std::pair<K, T>& item, int nType, int nVersion=VERSION);
-template<typename Stream, typename K, typename T> void Unserialize(Stream& is, std::pair<K, T>& item, int nType, int nVersion=VERSION);
+template<typename K, typename T> unsigned int GetSerializeSize(const std::pair<K, T>& item, int nType, int nVersion);
+template<typename Stream, typename K, typename T> void Serialize(Stream& os, const std::pair<K, T>& item, int nType, int nVersion);
+template<typename Stream, typename K, typename T> void Unserialize(Stream& is, std::pair<K, T>& item, int nType, int nVersion);
// 3 tuple
-template<typename T0, typename T1, typename T2> unsigned int GetSerializeSize(const boost::tuple<T0, T1, T2>& item, int nType, int nVersion=VERSION);
-template<typename Stream, typename T0, typename T1, typename T2> void Serialize(Stream& os, const boost::tuple<T0, T1, T2>& item, int nType, int nVersion=VERSION);
-template<typename Stream, typename T0, typename T1, typename T2> void Unserialize(Stream& is, boost::tuple<T0, T1, T2>& item, int nType, int nVersion=VERSION);
+template<typename T0, typename T1, typename T2> unsigned int GetSerializeSize(const boost::tuple<T0, T1, T2>& item, int nType, int nVersion);
+template<typename Stream, typename T0, typename T1, typename T2> void Serialize(Stream& os, const boost::tuple<T0, T1, T2>& item, int nType, int nVersion);
+template<typename Stream, typename T0, typename T1, typename T2> void Unserialize(Stream& is, boost::tuple<T0, T1, T2>& item, int nType, int 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=VERSION);
-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=VERSION);
-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=VERSION);
+template<typename T0, typename T1, typename T2, typename T3> unsigned int GetSerializeSize(const boost::tuple<T0, T1, T2, T3>& item, int nType, int nVersion);
+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);
+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);
// 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=VERSION);
-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=VERSION);
-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=VERSION);
+template<typename K, typename T, typename Pred, typename A> unsigned int GetSerializeSize(const std::map<K, T, Pred, A>& m, int nType, int nVersion);
+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);
+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);
// set
-template<typename K, typename Pred, typename A> unsigned int GetSerializeSize(const std::set<K, Pred, A>& m, int nType, int nVersion=VERSION);
-template<typename Stream, typename K, typename Pred, typename A> void Serialize(Stream& os, const std::set<K, Pred, A>& m, int nType, int nVersion=VERSION);
-template<typename Stream, typename K, typename Pred, typename A> void Unserialize(Stream& is, std::set<K, Pred, A>& m, int nType, int nVersion=VERSION);
+template<typename K, typename Pred, typename A> unsigned int GetSerializeSize(const std::set<K, Pred, A>& m, int nType, int nVersion);
+template<typename Stream, typename K, typename Pred, typename A> void Serialize(Stream& os, const std::set<K, Pred, A>& m, int nType, int nVersion);
+template<typename Stream, typename K, typename Pred, typename A> void Unserialize(Stream& is, std::set<K, Pred, A>& m, int nType, int nVersion);
// Thanks to Boost serialization for this idea.
//
template<typename T>
-inline unsigned int GetSerializeSize(const T& a, long nType, int nVersion=VERSION)
+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=VERSION)
+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=VERSION)
+inline void Unserialize(Stream& is, T& a, long nType, int nVersion)
{
a.Unserialize(is, (int)nType, nVersion);
}
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&)
{
- //unsigned int nSize = ReadCompactSize(is);
- //v.resize(nSize);
- //is.read((char*)&v[0], nSize * sizeof(T));
-
// Limit size per read so bogus size value won't cause out of memory
v.clear();
unsigned int nSize = ReadCompactSize(is);
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&)
{
- //unsigned int nSize = ReadCompactSize(is);
- //v.resize(nSize);
- //for (std::vector<T, A>::iterator vi = v.begin(); vi != v.end(); ++vi)
- // Unserialize(is, (*vi), nType, nVersion);
-
v.clear();
unsigned int nSize = ReadCompactSize(is);
unsigned int i = 0;
-//
-// Allocator that locks its contents from being paged
-// out of memory and clears its contents before deletion.
-//
-template<typename T>
-struct secure_allocator : public std::allocator<T>
-{
- // MSVC8 default copy constructor is broken
- typedef std::allocator<T> base;
- typedef typename base::size_type size_type;
- typedef typename base::difference_type difference_type;
- typedef typename base::pointer pointer;
- typedef typename base::const_pointer const_pointer;
- typedef typename base::reference reference;
- typedef typename base::const_reference const_reference;
- typedef typename base::value_type value_type;
- secure_allocator() throw() {}
- secure_allocator(const secure_allocator& a) throw() : base(a) {}
- template <typename U>
- secure_allocator(const secure_allocator<U>& a) throw() : base(a) {}
- ~secure_allocator() throw() {}
- template<typename _Other> struct rebind
- { typedef secure_allocator<_Other> other; };
-
- T* allocate(std::size_t n, const void *hint = 0)
- {
- T *p;
- p = std::allocator<T>::allocate(n, hint);
- if (p != NULL)
- mlock(p, sizeof(T) * n);
- return p;
- }
-
- void deallocate(T* p, std::size_t n)
- {
- if (p != NULL)
- {
- memset(p, 0, sizeof(T) * n);
- munlock(p, sizeof(T) * n);
- }
- std::allocator<T>::deallocate(p, n);
- }
-};
-
-
-//
-// Allocator that clears its contents before deletion.
-//
-template<typename T>
-struct zero_after_free_allocator : public std::allocator<T>
-{
- // MSVC8 default copy constructor is broken
- typedef std::allocator<T> base;
- typedef typename base::size_type size_type;
- typedef typename base::difference_type difference_type;
- typedef typename base::pointer pointer;
- typedef typename base::const_pointer const_pointer;
- typedef typename base::reference reference;
- typedef typename base::const_reference const_reference;
- typedef typename base::value_type value_type;
- zero_after_free_allocator() throw() {}
- zero_after_free_allocator(const zero_after_free_allocator& a) throw() : base(a) {}
- template <typename U>
- zero_after_free_allocator(const zero_after_free_allocator<U>& a) throw() : base(a) {}
- ~zero_after_free_allocator() throw() {}
- template<typename _Other> struct rebind
- { typedef zero_after_free_allocator<_Other> other; };
-
- void deallocate(T* p, std::size_t n)
- {
- if (p != NULL)
- memset(p, 0, sizeof(T) * n);
- std::allocator<T>::deallocate(p, n);
- }
-};
+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.
-//
+/** 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 std::vector<char, zero_after_free_allocator<char> > vector_type;
+ typedef CSerializeData vector_type;
vector_type vch;
unsigned int nReadPos;
short state;
typedef vector_type::const_iterator const_iterator;
typedef vector_type::reverse_iterator reverse_iterator;
- explicit CDataStream(int nTypeIn=SER_NETWORK, int nVersionIn=VERSION)
+ explicit CDataStream(int nTypeIn, int nVersionIn)
{
Init(nTypeIn, nVersionIn);
}
- CDataStream(const_iterator pbegin, const_iterator pend, int nTypeIn=SER_NETWORK, int nVersionIn=VERSION) : vch(pbegin, pend)
+ 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=SER_NETWORK, int nVersionIn=VERSION) : vch(pbegin, pend)
+ 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=SER_NETWORK, int nVersionIn=VERSION) : vch(vchIn.begin(), vchIn.end())
+ 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=SER_NETWORK, int nVersionIn=VERSION) : vch(vchIn.begin(), vchIn.end())
+ 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=SER_NETWORK, int nVersionIn=VERSION) : vch((char*)&vchIn.begin()[0], (char*)&vchIn.end()[0])
+ CDataStream(const std::vector<unsigned char>& vchIn, int nTypeIn, int nVersionIn) : vch(vchIn.begin(), vchIn.end())
{
Init(nTypeIn, nVersionIn);
}
- void Init(int nTypeIn=SER_NETWORK, int nVersionIn=VERSION)
+ void Init(int nTypeIn, int nVersionIn)
{
nReadPos = 0;
nType = nTypeIn;
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)
- {
- if (it == vch.begin() + nReadPos && 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);
- }
-
+#ifndef _MSC_VER
void insert(iterator it, std::vector<char>::const_iterator first, std::vector<char>::const_iterator last)
{
- if (it == vch.begin() + nReadPos && last - first <= nReadPos)
+ 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);
else
vch.insert(it, first, last);
}
+#endif
#if !defined(_MSC_VER) || _MSC_VER >= 1300
void insert(iterator it, const char* first, const char* last)
{
- if (it == vch.begin() + nReadPos && last - first <= nReadPos)
+ 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);
}
template<typename Stream>
- void Serialize(Stream& s, int nType=0, int nVersion=VERSION) const
+ void Serialize(Stream& s, int nType, int nVersion) const
{
// Special case: stream << stream concatenates like stream += stream
if (!vch.empty())
::Unserialize(*this, obj, nType, nVersion);
return (*this);
}
-};
-#ifdef TESTCDATASTREAM
-// VC6sp6
-// CDataStream:
-// n=1000 0 seconds
-// n=2000 0 seconds
-// n=4000 0 seconds
-// n=8000 0 seconds
-// n=16000 0 seconds
-// n=32000 0 seconds
-// n=64000 1 seconds
-// n=128000 1 seconds
-// n=256000 2 seconds
-// n=512000 4 seconds
-// n=1024000 8 seconds
-// n=2048000 16 seconds
-// n=4096000 32 seconds
-// stringstream:
-// n=1000 1 seconds
-// n=2000 1 seconds
-// n=4000 13 seconds
-// n=8000 87 seconds
-// n=16000 400 seconds
-// n=32000 1660 seconds
-// n=64000 6749 seconds
-// n=128000 27241 seconds
-// n=256000 109804 seconds
-#include <iostream>
-int main(int argc, char *argv[])
-{
- vector<unsigned char> vch(0xcc, 250);
- printf("CDataStream:\n");
- for (int n = 1000; n <= 4500000; n *= 2)
- {
- CDataStream ss;
- time_t nStart = time(NULL);
- for (int i = 0; i < n; i++)
- ss.write((char*)&vch[0], vch.size());
- printf("n=%-10d %d seconds\n", n, time(NULL) - nStart);
- }
- printf("stringstream:\n");
- for (int n = 1000; n <= 4500000; n *= 2)
- {
- stringstream ss;
- time_t nStart = time(NULL);
- for (int i = 0; i < n; i++)
- ss.write((char*)&vch[0], vch.size());
- printf("n=%-10d %d seconds\n", n, time(NULL) - nStart);
+ void GetAndClear(CSerializeData &data) {
+ vch.swap(data);
+ CSerializeData().swap(vch);
}
-}
-#endif
+};
-//
-// Automatic closing 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).
-//
+/** 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:
int nType;
int nVersion;
- CAutoFile(FILE* filenew=NULL, int nTypeIn=SER_DISK, int nVersionIn=VERSION)
+ CAutoFile(FILE* filenew, int nTypeIn, int nVersionIn)
{
file = filenew;
nType = nTypeIn;
void ReadVersion() { *this >> nVersion; }
void WriteVersion() { *this << nVersion; }
- CAutoFile& read(char* pch, int nSize)
+ CAutoFile& read(char* pch, size_t nSize)
{
if (!file)
throw std::ios_base::failure("CAutoFile::read : file handle is NULL");
return (*this);
}
- CAutoFile& write(const char* pch, int nSize)
+ CAutoFile& write(const char* pch, size_t nSize)
{
if (!file)
throw std::ios_base::failure("CAutoFile::write : file handle is NULL");
}
};
+/** 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
git://git.novaco.in / novacoin.git / blobdiff