// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_SERIALIZE_H
#define BITCOIN_SERIALIZE_H

#include <cassert>
#include <vector>
#include <set>
#include <tuple>
#include <type_traits>
#include <limits>
#include <cstdio>
#include <ios>
#include <cinttypes>
#include <map>

#if defined __USE_MINGW_ANSI_STDIO
#undef __USE_MINGW_ANSI_STDIO // This constant forces MinGW to conduct stupid behavior
#endif


class CScript;

static const unsigned int MAX_SIZE = 0x02000000;

// 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>
inline T& REF(const T& val)
{
    return const_cast<T&>(val);
}

/////////////////////////////////////////////////////////////////
//
// Templates for serializing to anything that looks like a stream,
// i.e. anything that supports .read(char*, int) and .write(char*, int)
//

enum
{
    // primary actions
    SER_NETWORK         = (1 << 0),
    SER_DISK            = (1 << 1),
    SER_GETHASH         = (1 << 2),

    // modifiers
    SER_SKIPSIG         = (1 << 16),
    SER_BLOCKHEADERONLY = (1 << 17)

};

#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;                  \
        {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 */ \
        {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;              \
        assert(fGetSize||fWrite||fRead); /* suppress warning */ \
        {statements}                            \
    }

#define READWRITE(obj)      (nSerSize += ::SerReadWrite(s, (obj), nType, nVersion, ser_action))






//
// Basic types
//
#define WRITEDATA(s, obj)   s.write((char*)&(obj), sizeof(obj))
#define READDATA(s, obj)    s.read((char*)&(obj), sizeof(obj))

inline unsigned int GetSerializeSize(char a,           int, int=0) { return sizeof(a); }
inline unsigned int GetSerializeSize(signed char a,    int, int=0) { return sizeof(a); }
inline unsigned int GetSerializeSize(unsigned char a,  int, int=0) { return sizeof(a); }
inline unsigned int GetSerializeSize(signed short a,   int, int=0) { return sizeof(a); }
inline unsigned int GetSerializeSize(unsigned short a, int, int=0) { return sizeof(a); }
inline unsigned int GetSerializeSize(signed int a,     int, int=0) { return sizeof(a); }
inline unsigned int GetSerializeSize(unsigned int a,   int, int=0) { return sizeof(a); }
//inline unsigned int GetSerializeSize(signed long a,    int, int=0) { return sizeof(a); }
//inline unsigned int GetSerializeSize(unsigned long a,  int, int=0) { return sizeof(a); }
inline unsigned int GetSerializeSize(int64_t a,    int, int=0) { return sizeof(a); }
inline unsigned int GetSerializeSize(uint64_t a,  int, int=0) { return sizeof(a); }
inline unsigned int GetSerializeSize(float a,          int, int=0) { return sizeof(a); }
inline unsigned int GetSerializeSize(double a,         int, int=0) { return sizeof(a); }

template<typename Stream> inline void Serialize(Stream& s, char a,           int, int=0) { WRITEDATA(s, a); }
template<typename Stream> inline void Serialize(Stream& s, signed char a,    int, int=0) { WRITEDATA(s, a); }
template<typename Stream> inline void Serialize(Stream& s, unsigned char a,  int, int=0) { WRITEDATA(s, a); }
template<typename Stream> inline void Serialize(Stream& s, signed short a,   int, int=0) { WRITEDATA(s, a); }
template<typename Stream> inline void Serialize(Stream& s, unsigned short a, int, int=0) { WRITEDATA(s, a); }
template<typename Stream> inline void Serialize(Stream& s, signed int a,     int, int=0) { WRITEDATA(s, a); }
template<typename Stream> inline void Serialize(Stream& s, unsigned int a,   int, int=0) { WRITEDATA(s, a); }
//template<typename Stream> inline void Serialize(Stream& s, signed long a,    int, int=0) { WRITEDATA(s, a); }
//template<typename Stream> inline void Serialize(Stream& s, unsigned long a,  int, int=0) { WRITEDATA(s, a); }
template<typename Stream> inline void Serialize(Stream& s, int64_t a,    int, int=0) { WRITEDATA(s, a); }
template<typename Stream> inline void Serialize(Stream& s, uint64_t a,  int, int=0) { WRITEDATA(s, a); }
template<typename Stream> inline void Serialize(Stream& s, float a,          int, int=0) { WRITEDATA(s, a); }
template<typename Stream> inline void Serialize(Stream& s, double a,         int, int=0) { WRITEDATA(s, a); }

template<typename Stream> inline void Unserialize(Stream& s, char& a,           int, int=0) { READDATA(s, a); }
template<typename Stream> inline void Unserialize(Stream& s, signed char& a,    int, int=0) { READDATA(s, a); }
template<typename Stream> inline void Unserialize(Stream& s, unsigned char& a,  int, int=0) { READDATA(s, a); }
template<typename Stream> inline void Unserialize(Stream& s, signed short& a,   int, int=0) { READDATA(s, a); }
template<typename Stream> inline void Unserialize(Stream& s, unsigned short& a, int, int=0) { READDATA(s, a); }
template<typename Stream> inline void Unserialize(Stream& s, signed int& a,     int, int=0) { READDATA(s, a); }
template<typename Stream> inline void Unserialize(Stream& s, unsigned int& a,   int, int=0) { READDATA(s, a); }
//template<typename Stream> inline void Unserialize(Stream& s, signed long& a,    int, int=0) { READDATA(s, a); }
//template<typename Stream> inline void Unserialize(Stream& s, unsigned long& a,  int, int=0) { READDATA(s, a); }
template<typename Stream> inline void Unserialize(Stream& s, int64_t& a,    int, int=0) { READDATA(s, a); }
template<typename Stream> inline void Unserialize(Stream& s, uint64_t& a,  int, int=0) { READDATA(s, a); }
template<typename Stream> inline void Unserialize(Stream& s, float& a,          int, int=0) { READDATA(s, a); }
template<typename Stream> inline void Unserialize(Stream& s, double& a,         int, int=0) { READDATA(s, a); }

inline unsigned int GetSerializeSize(bool a, int, int=0)                          { return sizeof(char); }
template<typename Stream> inline void Serialize(Stream& s, bool a, int, int=0)    { char f=a; WRITEDATA(s, f); }
template<typename Stream> inline void Unserialize(Stream& s, bool& a, int, int=0) { char f; READDATA(s, f); a=f; }






//
// Compact size
//  size <  253        -- 1 byte
//  size <= USHRT_MAX  -- 3 bytes  (253 + 2 bytes)
//  size <= UINT_MAX   -- 5 bytes  (254 + 4 bytes)
//  size >  UINT_MAX   -- 9 bytes  (255 + 8 bytes)
//
inline unsigned int GetSizeOfCompactSize(uint64_t nSize)
{
    if (nSize < 253)             return sizeof(unsigned char);
    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_t);
}

template<typename Stream>
void WriteCompactSize(Stream& os, uint64_t nSize)
{
    if (nSize < 253)
    {
        unsigned char chSize = (unsigned char)nSize;
        WRITEDATA(os, chSize);
    }
    else if (nSize <= std::numeric_limits<unsigned short>::max())
    {
        unsigned char chSize = 253;
        unsigned short xSize = (unsigned short)nSize;
        WRITEDATA(os, chSize);
        WRITEDATA(os, xSize);
    }
    else if (nSize <= std::numeric_limits<unsigned int>::max())
    {
        unsigned char chSize = 254;
        unsigned int xSize = (unsigned int)nSize;
        WRITEDATA(os, chSize);
        WRITEDATA(os, xSize);
    }
    else
    {
        unsigned char chSize = 255;
        uint64_t xSize = nSize;
        WRITEDATA(os, chSize);
        WRITEDATA(os, xSize);
    }
    return;
}

template<typename Stream>
uint64_t ReadCompactSize(Stream& is)
{
    unsigned char chSize;
    READDATA(is, chSize);
    uint64_t nSizeRet = 0;
    if (chSize < 253)
    {
        nSizeRet = chSize;
    }
    else if (chSize == 253)
    {
        unsigned short xSize;
        READDATA(is, xSize);
        nSizeRet = xSize;
    }
    else if (chSize == 254)
    {
        unsigned int xSize;
        READDATA(is, xSize);
        nSizeRet = xSize;
    }
    else
    {
        uint64_t xSize;
        READDATA(is, xSize);
        nSizeRet = xSize;
    }
    if (nSizeRet > (uint64_t)MAX_SIZE)
        throw std::ios_base::failure("ReadCompactSize() : size too large");
    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))
//
// 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.
//
// 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;
    for ( ; ; ) {
        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;
    for ( ; ; ) {
        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;
    for ( ; ; ) {
        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:
    char* pbegin;
    char* pend;
public:
    CFlatData(void* pbeginIn, void* pendIn) : pbegin((char*)pbeginIn), pend((char*)pendIn) { }
    char* begin() { return pbegin; }
    const char* begin() const { return pbegin; }
    char* end() { return pend; }
    const char* end() const { return pend; }

    unsigned int GetSerializeSize(int, int=0) const
    {
        return (unsigned int)(pend - pbegin);
    }

    template<typename Stream>
    void Serialize(Stream& s, int, int=0) const
    {
        s.write(pbegin, (int)(pend - pbegin));
    }

    template<typename Stream>
    void Unserialize(Stream& s, int, int=0)
    {
        s.read(pbegin, pend - pbegin);
    }
};

template<typename I>
class CVarInt
{
protected:
    I &n;
public:
    CVarInt(I& nIn) : n(nIn) { }

    unsigned int GetSerializeSize(int, int) const {
        return GetSizeOfVarInt<I>(n);
    }

    template<typename Stream>
    void Serialize(Stream &s, int, int) const {
        WriteVarInt<Stream,I>(s, n);
    }

    template<typename Stream>
    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
//

// string
template<typename C> unsigned int GetSerializeSize(const std::basic_string<C>& str, int, int=0);
template<typename Stream, typename C> void Serialize(Stream& os, const std::basic_string<C>& str, int, int=0);
template<typename Stream, typename C> void Unserialize(Stream& is, std::basic_string<C>& str, int, int=0);

// vector
template<typename T, typename A> unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const std::true_type&);
template<typename T, typename A> unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const std::false_type&);
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 std::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 std::false_type&);
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 std::true_type&);
template<typename Stream, typename T, typename A> void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const std::false_type&);
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);
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);
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 std::tuple<T0, T1, T2>& item, int nType, int nVersion);
template<typename Stream, typename T0, typename T1, typename T2> void Serialize(Stream& os, const std::tuple<T0, T1, T2>& item, int nType, int nVersion);
template<typename Stream, typename T0, typename T1, typename T2> void Unserialize(Stream& is, std::tuple<T0, T1, T2>& item, int nType, int nVersion);

// 4 tuple
template<typename T0, typename T1, typename T2, typename T3> unsigned int GetSerializeSize(const std::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 std::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, std::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);
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);
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);





//
// If none of the specialized versions above matched, default to calling member function.
// "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 (unsigned int)(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], (int)(str.size() * sizeof(str[0])));
}

template<typename Stream, typename C>
void Unserialize(Stream& is, std::basic_string<C>& str, int, int)
{
    unsigned int nSize = (unsigned int)(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 std::true_type&)
{
    return (unsigned int)(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 std::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, std::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 std::true_type&)
{
    WriteCompactSize(os, v.size());
    if (!v.empty())
        os.write((char*)&v[0], (int)(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 std::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, std::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 std::true_type&)
{
    // Limit size per read so bogus size value won't cause out of memory
    v.clear();
    unsigned int nSize = (unsigned int)(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 std::false_type&)
{
    v.clear();
    unsigned int nSize = (unsigned int)(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, std::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 std::tuple<T0, T1, T2>& item, int nType, int nVersion)
{
    unsigned int nSize = 0;
    nSize += GetSerializeSize(std::get<0>(item), nType, nVersion);
    nSize += GetSerializeSize(std::get<1>(item), nType, nVersion);
    nSize += GetSerializeSize(std::get<2>(item), nType, nVersion);
    return nSize;
}

template<typename Stream, typename T0, typename T1, typename T2>
void Serialize(Stream& os, const std::tuple<T0, T1, T2>& item, int nType, int nVersion)
{
    Serialize(os, std::get<0>(item), nType, nVersion);
    Serialize(os, std::get<1>(item), nType, nVersion);
    Serialize(os, std::get<2>(item), nType, nVersion);
}

template<typename Stream, typename T0, typename T1, typename T2>
void Unserialize(Stream& is, std::tuple<T0, T1, T2>& item, int nType, int nVersion)
{
    Unserialize(is, std::get<0>(item), nType, nVersion);
    Unserialize(is, std::get<1>(item), nType, nVersion);
    Unserialize(is, std::get<2>(item), nType, nVersion);
}



//
// 4 tuple
//
template<typename T0, typename T1, typename T2, typename T3>
unsigned int GetSerializeSize(const std::tuple<T0, T1, T2, T3>& item, int nType, int nVersion)
{
    unsigned int nSize = 0;
    nSize += GetSerializeSize(std::get<0>(item), nType, nVersion);
    nSize += GetSerializeSize(std::get<1>(item), nType, nVersion);
    nSize += GetSerializeSize(std::get<2>(item), nType, nVersion);
    nSize += GetSerializeSize(std::get<3>(item), nType, nVersion);
    return nSize;
}

template<typename Stream, typename T0, typename T1, typename T2, typename T3>
void Serialize(Stream& os, const std::tuple<T0, T1, T2, T3>& item, int nType, int nVersion)
{
    Serialize(os, std::get<0>(item), nType, nVersion);
    Serialize(os, std::get<1>(item), nType, nVersion);
    Serialize(os, std::get<2>(item), nType, nVersion);
    Serialize(os, std::get<3>(item), nType, nVersion);
}

template<typename Stream, typename T0, typename T1, typename T2, typename T3>
void Unserialize(Stream& is, std::tuple<T0, T1, T2, T3>& item, int nType, int nVersion)
{
    Unserialize(is, std::get<0>(item), nType, nVersion);
    Unserialize(is, std::get<1>(item), nType, nVersion);
    Unserialize(is, std::get<2>(item), nType, nVersion);
    Unserialize(is, std::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 = (unsigned int)(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;
};

#endif