Merge branch 'master' of github.com:bitcoin/bitcoin

1 files changed, 757 insertions, 0 deletions

diff --git a/src/uint256.h b/src/uint256.h
new file mode 100644
index 0000000000..c4f391a38a
--- /dev/null
+++ b/src/uint256.h
@@ -0,0 +1,757 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+
+#include <limits.h>
+#include <string>
+#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
+
+
+inline int Testuint256AdHoc(vector<string> vArg);
+
+
+
+// We have to keep a separate base class without constructors
+// so the compiler will let us use it in a union
+template<unsigned int BITS>
+class base_uint
+{
+protected:
+    enum { WIDTH=BITS/32 };
+    unsigned int pn[WIDTH];
+public:
+
+    bool operator!() const
+    {
+        for (int i = 0; i < WIDTH; i++)
+            if (pn[i] != 0)
+                return false;
+        return true;
+    }
+
+    const base_uint operator~() const
+    {
+        base_uint ret;
+        for (int i = 0; i < WIDTH; i++)
+            ret.pn[i] = ~pn[i];
+        return ret;
+    }
+
+    const base_uint operator-() const
+    {
+        base_uint ret;
+        for (int i = 0; i < WIDTH; i++)
+            ret.pn[i] = ~pn[i];
+        ret++;
+        return ret;
+    }
+
+
+    base_uint& operator=(uint64 b)
+    {
+        pn[0] = (unsigned int)b;
+        pn[1] = (unsigned int)(b >> 32);
+        for (int i = 2; i < WIDTH; i++)
+            pn[i] = 0;
+        return *this;
+    }
+
+    base_uint& operator^=(const base_uint& b)
+    {
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] ^= b.pn[i];
+        return *this;
+    }
+
+    base_uint& operator&=(const base_uint& b)
+    {
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] &= b.pn[i];
+        return *this;
+    }
+
+    base_uint& operator|=(const base_uint& b)
+    {
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] |= b.pn[i];
+        return *this;
+    }
+
+    base_uint& operator^=(uint64 b)
+    {
+        pn[0] ^= (unsigned int)b;
+        pn[1] ^= (unsigned int)(b >> 32);
+        return *this;
+    }
+
+    base_uint& operator&=(uint64 b)
+    {
+        pn[0] &= (unsigned int)b;
+        pn[1] &= (unsigned int)(b >> 32);
+        return *this;
+    }
+
+    base_uint& operator|=(uint64 b)
+    {
+        pn[0] |= (unsigned int)b;
+        pn[1] |= (unsigned int)(b >> 32);
+        return *this;
+    }
+
+    base_uint& operator<<=(unsigned int shift)
+    {
+        base_uint a(*this);
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] = 0;
+        int k = shift / 32;
+        shift = shift % 32;
+        for (int i = 0; i < WIDTH; i++)
+        {
+            if (i+k+1 < WIDTH && shift != 0)
+                pn[i+k+1] |= (a.pn[i] >> (32-shift));
+            if (i+k < WIDTH)
+                pn[i+k] |= (a.pn[i] << shift);
+        }
+        return *this;
+    }
+
+    base_uint& operator>>=(unsigned int shift)
+    {
+        base_uint a(*this);
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] = 0;
+        int k = shift / 32;
+        shift = shift % 32;
+        for (int i = 0; i < WIDTH; i++)
+        {
+            if (i-k-1 >= 0 && shift != 0)
+                pn[i-k-1] |= (a.pn[i] << (32-shift));
+            if (i-k >= 0)
+                pn[i-k] |= (a.pn[i] >> shift);
+        }
+        return *this;
+    }
+
+    base_uint& operator+=(const base_uint& b)
+    {
+        uint64 carry = 0;
+        for (int i = 0; i < WIDTH; i++)
+        {
+            uint64 n = carry + pn[i] + b.pn[i];
+            pn[i] = n & 0xffffffff;
+            carry = n >> 32;
+        }
+        return *this;
+    }
+
+    base_uint& operator-=(const base_uint& b)
+    {
+        *this += -b;
+        return *this;
+    }
+
+    base_uint& operator+=(uint64 b64)
+    {
+        base_uint b;
+        b = b64;
+        *this += b;
+        return *this;
+    }
+
+    base_uint& operator-=(uint64 b64)
+    {
+        base_uint b;
+        b = b64;
+        *this += -b;
+        return *this;
+    }
+
+
+    base_uint& operator++()
+    {
+        // prefix operator
+        int i = 0;
+        while (++pn[i] == 0 && i < WIDTH-1)
+            i++;
+        return *this;
+    }
+
+    const base_uint operator++(int)
+    {
+        // postfix operator
+        const base_uint ret = *this;
+        ++(*this);
+        return ret;
+    }
+
+    base_uint& operator--()
+    {
+        // prefix operator
+        int i = 0;
+        while (--pn[i] == -1 && i < WIDTH-1)
+            i++;
+        return *this;
+    }
+
+    const base_uint operator--(int)
+    {
+        // postfix operator
+        const base_uint ret = *this;
+        --(*this);
+        return ret;
+    }
+
+
+    friend inline bool operator<(const base_uint& a, const base_uint& b)
+    {
+        for (int i = base_uint::WIDTH-1; i >= 0; i--)
+        {
+            if (a.pn[i] < b.pn[i])
+                return true;
+            else if (a.pn[i] > b.pn[i])
+                return false;
+        }
+        return false;
+    }
+
+    friend inline bool operator<=(const base_uint& a, const base_uint& b)
+    {
+        for (int i = base_uint::WIDTH-1; i >= 0; i--)
+        {
+            if (a.pn[i] < b.pn[i])
+                return true;
+            else if (a.pn[i] > b.pn[i])
+                return false;
+        }
+        return true;
+    }
+
+    friend inline bool operator>(const base_uint& a, const base_uint& b)
+    {
+        for (int i = base_uint::WIDTH-1; i >= 0; i--)
+        {
+            if (a.pn[i] > b.pn[i])
+                return true;
+            else if (a.pn[i] < b.pn[i])
+                return false;
+        }
+        return false;
+    }
+
+    friend inline bool operator>=(const base_uint& a, const base_uint& b)
+    {
+        for (int i = base_uint::WIDTH-1; i >= 0; i--)
+        {
+            if (a.pn[i] > b.pn[i])
+                return true;
+            else if (a.pn[i] < b.pn[i])
+                return false;
+        }
+        return true;
+    }
+
+    friend inline bool operator==(const base_uint& a, const base_uint& b)
+    {
+        for (int i = 0; i < base_uint::WIDTH; i++)
+            if (a.pn[i] != b.pn[i])
+                return false;
+        return true;
+    }
+
+    friend inline bool operator==(const base_uint& a, uint64 b)
+    {
+        if (a.pn[0] != (unsigned int)b)
+            return false;
+        if (a.pn[1] != (unsigned int)(b >> 32))
+            return false;
+        for (int i = 2; i < base_uint::WIDTH; i++)
+            if (a.pn[i] != 0)
+                return false;
+        return true;
+    }
+
+    friend inline bool operator!=(const base_uint& a, const base_uint& b)
+    {
+        return (!(a == b));
+    }
+
+    friend inline bool operator!=(const base_uint& a, uint64 b)
+    {
+        return (!(a == b));
+    }
+
+
+
+    std::string GetHex() const
+    {
+        char psz[sizeof(pn)*2 + 1];
+        for (int i = 0; i < sizeof(pn); i++)
+            sprintf(psz + i*2, "%02x", ((unsigned char*)pn)[sizeof(pn) - i - 1]);
+        return string(psz, psz + sizeof(pn)*2);
+    }
+
+    void SetHex(const char* psz)
+    {
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] = 0;
+
+        // skip leading spaces
+        while (isspace(*psz))
+            psz++;
+
+        // skip 0x
+        if (psz[0] == '0' && tolower(psz[1]) == 'x')
+            psz += 2;
+
+        // hex string to uint
+        static char phexdigit[256] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0 };
+        const char* pbegin = psz;
+        while (phexdigit[*psz] || *psz == '0')
+            psz++;
+        psz--;
+        unsigned char* p1 = (unsigned char*)pn;
+        unsigned char* pend = p1 + WIDTH * 4;
+        while (psz >= pbegin && p1 < pend)
+        {
+            *p1 = phexdigit[(unsigned char)*psz--];
+            if (psz >= pbegin)
+            {
+                *p1 |= (phexdigit[(unsigned char)*psz--] << 4);
+                p1++;
+            }
+        }
+    }
+
+    void SetHex(const std::string& str)
+    {
+        SetHex(str.c_str());
+    }
+
+    std::string ToString() const
+    {
+        return (GetHex());
+    }
+
+    unsigned char* begin()
+    {
+        return (unsigned char*)&pn[0];
+    }
+
+    unsigned char* end()
+    {
+        return (unsigned char*)&pn[WIDTH];
+    }
+
+    unsigned int size()
+    {
+        return sizeof(pn);
+    }
+
+
+    unsigned int GetSerializeSize(int nType=0, int nVersion=VERSION) const
+    {
+        return sizeof(pn);
+    }
+
+    template<typename Stream>
+    void Serialize(Stream& s, int nType=0, int nVersion=VERSION) const
+    {
+        s.write((char*)pn, sizeof(pn));
+    }
+
+    template<typename Stream>
+    void Unserialize(Stream& s, int nType=0, int nVersion=VERSION)
+    {
+        s.read((char*)pn, sizeof(pn));
+    }
+
+
+    friend class uint160;
+    friend class uint256;
+    friend inline int Testuint256AdHoc(vector<string> vArg);
+};
+
+typedef base_uint<160> base_uint160;
+typedef base_uint<256> base_uint256;
+
+
+
+//
+// uint160 and uint256 could be implemented as templates, but to keep
+// compile errors and debugging cleaner, they're copy and pasted.
+//
+
+
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// uint160
+//
+
+class uint160 : public base_uint160
+{
+public:
+    typedef base_uint160 basetype;
+
+    uint160()
+    {
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] = 0;
+    }
+
+    uint160(const basetype& b)
+    {
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] = b.pn[i];
+    }
+
+    uint160& operator=(const basetype& b)
+    {
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] = b.pn[i];
+        return *this;
+    }
+
+    uint160(uint64 b)
+    {
+        pn[0] = (unsigned int)b;
+        pn[1] = (unsigned int)(b >> 32);
+        for (int i = 2; i < WIDTH; i++)
+            pn[i] = 0;
+    }
+
+    uint160& operator=(uint64 b)
+    {
+        pn[0] = (unsigned int)b;
+        pn[1] = (unsigned int)(b >> 32);
+        for (int i = 2; i < WIDTH; i++)
+            pn[i] = 0;
+        return *this;
+    }
+
+    explicit uint160(const std::string& str)
+    {
+        SetHex(str);
+    }
+
+    explicit uint160(const std::vector<unsigned char>& vch)
+    {
+        if (vch.size() == sizeof(pn))
+            memcpy(pn, &vch[0], sizeof(pn));
+        else
+            *this = 0;
+    }
+};
+
+inline bool operator==(const uint160& a, uint64 b)                           { return (base_uint160)a == b; }
+inline bool operator!=(const uint160& a, uint64 b)                           { return (base_uint160)a != b; }
+inline const uint160 operator<<(const base_uint160& a, unsigned int shift)   { return uint160(a) <<= shift; }
+inline const uint160 operator>>(const base_uint160& a, unsigned int shift)   { return uint160(a) >>= shift; }
+inline const uint160 operator<<(const uint160& a, unsigned int shift)        { return uint160(a) <<= shift; }
+inline const uint160 operator>>(const uint160& a, unsigned int shift)        { return uint160(a) >>= shift; }
+
+inline const uint160 operator^(const base_uint160& a, const base_uint160& b) { return uint160(a) ^= b; }
+inline const uint160 operator&(const base_uint160& a, const base_uint160& b) { return uint160(a) &= b; }
+inline const uint160 operator|(const base_uint160& a, const base_uint160& b) { return uint160(a) |= b; }
+inline const uint160 operator+(const base_uint160& a, const base_uint160& b) { return uint160(a) += b; }
+inline const uint160 operator-(const base_uint160& a, const base_uint160& b) { return uint160(a) -= b; }
+
+inline bool operator<(const base_uint160& a, const uint160& b)          { return (base_uint160)a <  (base_uint160)b; }
+inline bool operator<=(const base_uint160& a, const uint160& b)         { return (base_uint160)a <= (base_uint160)b; }
+inline bool operator>(const base_uint160& a, const uint160& b)          { return (base_uint160)a >  (base_uint160)b; }
+inline bool operator>=(const base_uint160& a, const uint160& b)         { return (base_uint160)a >= (base_uint160)b; }
+inline bool operator==(const base_uint160& a, const uint160& b)         { return (base_uint160)a == (base_uint160)b; }
+inline bool operator!=(const base_uint160& a, const uint160& b)         { return (base_uint160)a != (base_uint160)b; }
+inline const uint160 operator^(const base_uint160& a, const uint160& b) { return (base_uint160)a ^  (base_uint160)b; }
+inline const uint160 operator&(const base_uint160& a, const uint160& b) { return (base_uint160)a &  (base_uint160)b; }
+inline const uint160 operator|(const base_uint160& a, const uint160& b) { return (base_uint160)a |  (base_uint160)b; }
+inline const uint160 operator+(const base_uint160& a, const uint160& b) { return (base_uint160)a +  (base_uint160)b; }
+inline const uint160 operator-(const base_uint160& a, const uint160& b) { return (base_uint160)a -  (base_uint160)b; }
+
+inline bool operator<(const uint160& a, const base_uint160& b)          { return (base_uint160)a <  (base_uint160)b; }
+inline bool operator<=(const uint160& a, const base_uint160& b)         { return (base_uint160)a <= (base_uint160)b; }
+inline bool operator>(const uint160& a, const base_uint160& b)          { return (base_uint160)a >  (base_uint160)b; }
+inline bool operator>=(const uint160& a, const base_uint160& b)         { return (base_uint160)a >= (base_uint160)b; }
+inline bool operator==(const uint160& a, const base_uint160& b)         { return (base_uint160)a == (base_uint160)b; }
+inline bool operator!=(const uint160& a, const base_uint160& b)         { return (base_uint160)a != (base_uint160)b; }
+inline const uint160 operator^(const uint160& a, const base_uint160& b) { return (base_uint160)a ^  (base_uint160)b; }
+inline const uint160 operator&(const uint160& a, const base_uint160& b) { return (base_uint160)a &  (base_uint160)b; }
+inline const uint160 operator|(const uint160& a, const base_uint160& b) { return (base_uint160)a |  (base_uint160)b; }
+inline const uint160 operator+(const uint160& a, const base_uint160& b) { return (base_uint160)a +  (base_uint160)b; }
+inline const uint160 operator-(const uint160& a, const base_uint160& b) { return (base_uint160)a -  (base_uint160)b; }
+
+inline bool operator<(const uint160& a, const uint160& b)               { return (base_uint160)a <  (base_uint160)b; }
+inline bool operator<=(const uint160& a, const uint160& b)              { return (base_uint160)a <= (base_uint160)b; }
+inline bool operator>(const uint160& a, const uint160& b)               { return (base_uint160)a >  (base_uint160)b; }
+inline bool operator>=(const uint160& a, const uint160& b)              { return (base_uint160)a >= (base_uint160)b; }
+inline bool operator==(const uint160& a, const uint160& b)              { return (base_uint160)a == (base_uint160)b; }
+inline bool operator!=(const uint160& a, const uint160& b)              { return (base_uint160)a != (base_uint160)b; }
+inline const uint160 operator^(const uint160& a, const uint160& b)      { return (base_uint160)a ^  (base_uint160)b; }
+inline const uint160 operator&(const uint160& a, const uint160& b)      { return (base_uint160)a &  (base_uint160)b; }
+inline const uint160 operator|(const uint160& a, const uint160& b)      { return (base_uint160)a |  (base_uint160)b; }
+inline const uint160 operator+(const uint160& a, const uint160& b)      { return (base_uint160)a +  (base_uint160)b; }
+inline const uint160 operator-(const uint160& a, const uint160& b)      { return (base_uint160)a -  (base_uint160)b; }
+
+
+
+
+
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// uint256
+//
+
+class uint256 : public base_uint256
+{
+public:
+    typedef base_uint256 basetype;
+
+    uint256()
+    {
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] = 0;
+    }
+
+    uint256(const basetype& b)
+    {
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] = b.pn[i];
+    }
+
+    uint256& operator=(const basetype& b)
+    {
+        for (int i = 0; i < WIDTH; i++)
+            pn[i] = b.pn[i];
+        return *this;
+    }
+
+    uint256(uint64 b)
+    {
+        pn[0] = (unsigned int)b;
+        pn[1] = (unsigned int)(b >> 32);
+        for (int i = 2; i < WIDTH; i++)
+            pn[i] = 0;
+    }
+
+    uint256& operator=(uint64 b)
+    {
+        pn[0] = (unsigned int)b;
+        pn[1] = (unsigned int)(b >> 32);
+        for (int i = 2; i < WIDTH; i++)
+            pn[i] = 0;
+        return *this;
+    }
+
+    explicit uint256(const std::string& str)
+    {
+        SetHex(str);
+    }
+
+    explicit uint256(const std::vector<unsigned char>& vch)
+    {
+        if (vch.size() == sizeof(pn))
+            memcpy(pn, &vch[0], sizeof(pn));
+        else
+            *this = 0;
+    }
+};
+
+inline bool operator==(const uint256& a, uint64 b)                           { return (base_uint256)a == b; }
+inline bool operator!=(const uint256& a, uint64 b)                           { return (base_uint256)a != b; }
+inline const uint256 operator<<(const base_uint256& a, unsigned int shift)   { return uint256(a) <<= shift; }
+inline const uint256 operator>>(const base_uint256& a, unsigned int shift)   { return uint256(a) >>= shift; }
+inline const uint256 operator<<(const uint256& a, unsigned int shift)        { return uint256(a) <<= shift; }
+inline const uint256 operator>>(const uint256& a, unsigned int shift)        { return uint256(a) >>= shift; }
+
+inline const uint256 operator^(const base_uint256& a, const base_uint256& b) { return uint256(a) ^= b; }
+inline const uint256 operator&(const base_uint256& a, const base_uint256& b) { return uint256(a) &= b; }
+inline const uint256 operator|(const base_uint256& a, const base_uint256& b) { return uint256(a) |= b; }
+inline const uint256 operator+(const base_uint256& a, const base_uint256& b) { return uint256(a) += b; }
+inline const uint256 operator-(const base_uint256& a, const base_uint256& b) { return uint256(a) -= b; }
+
+inline bool operator<(const base_uint256& a, const uint256& b)          { return (base_uint256)a <  (base_uint256)b; }
+inline bool operator<=(const base_uint256& a, const uint256& b)         { return (base_uint256)a <= (base_uint256)b; }
+inline bool operator>(const base_uint256& a, const uint256& b)          { return (base_uint256)a >  (base_uint256)b; }
+inline bool operator>=(const base_uint256& a, const uint256& b)         { return (base_uint256)a >= (base_uint256)b; }
+inline bool operator==(const base_uint256& a, const uint256& b)         { return (base_uint256)a == (base_uint256)b; }
+inline bool operator!=(const base_uint256& a, const uint256& b)         { return (base_uint256)a != (base_uint256)b; }
+inline const uint256 operator^(const base_uint256& a, const uint256& b) { return (base_uint256)a ^  (base_uint256)b; }
+inline const uint256 operator&(const base_uint256& a, const uint256& b) { return (base_uint256)a &  (base_uint256)b; }
+inline const uint256 operator|(const base_uint256& a, const uint256& b) { return (base_uint256)a |  (base_uint256)b; }
+inline const uint256 operator+(const base_uint256& a, const uint256& b) { return (base_uint256)a +  (base_uint256)b; }
+inline const uint256 operator-(const base_uint256& a, const uint256& b) { return (base_uint256)a -  (base_uint256)b; }
+
+inline bool operator<(const uint256& a, const base_uint256& b)          { return (base_uint256)a <  (base_uint256)b; }
+inline bool operator<=(const uint256& a, const base_uint256& b)         { return (base_uint256)a <= (base_uint256)b; }
+inline bool operator>(const uint256& a, const base_uint256& b)          { return (base_uint256)a >  (base_uint256)b; }
+inline bool operator>=(const uint256& a, const base_uint256& b)         { return (base_uint256)a >= (base_uint256)b; }
+inline bool operator==(const uint256& a, const base_uint256& b)         { return (base_uint256)a == (base_uint256)b; }
+inline bool operator!=(const uint256& a, const base_uint256& b)         { return (base_uint256)a != (base_uint256)b; }
+inline const uint256 operator^(const uint256& a, const base_uint256& b) { return (base_uint256)a ^  (base_uint256)b; }
+inline const uint256 operator&(const uint256& a, const base_uint256& b) { return (base_uint256)a &  (base_uint256)b; }
+inline const uint256 operator|(const uint256& a, const base_uint256& b) { return (base_uint256)a |  (base_uint256)b; }
+inline const uint256 operator+(const uint256& a, const base_uint256& b) { return (base_uint256)a +  (base_uint256)b; }
+inline const uint256 operator-(const uint256& a, const base_uint256& b) { return (base_uint256)a -  (base_uint256)b; }
+
+inline bool operator<(const uint256& a, const uint256& b)               { return (base_uint256)a <  (base_uint256)b; }
+inline bool operator<=(const uint256& a, const uint256& b)              { return (base_uint256)a <= (base_uint256)b; }
+inline bool operator>(const uint256& a, const uint256& b)               { return (base_uint256)a >  (base_uint256)b; }
+inline bool operator>=(const uint256& a, const uint256& b)              { return (base_uint256)a >= (base_uint256)b; }
+inline bool operator==(const uint256& a, const uint256& b)              { return (base_uint256)a == (base_uint256)b; }
+inline bool operator!=(const uint256& a, const uint256& b)              { return (base_uint256)a != (base_uint256)b; }
+inline const uint256 operator^(const uint256& a, const uint256& b)      { return (base_uint256)a ^  (base_uint256)b; }
+inline const uint256 operator&(const uint256& a, const uint256& b)      { return (base_uint256)a &  (base_uint256)b; }
+inline const uint256 operator|(const uint256& a, const uint256& b)      { return (base_uint256)a |  (base_uint256)b; }
+inline const uint256 operator+(const uint256& a, const uint256& b)      { return (base_uint256)a +  (base_uint256)b; }
+inline const uint256 operator-(const uint256& a, const uint256& b)      { return (base_uint256)a -  (base_uint256)b; }
+
+
+
+
+
+
+
+
+
+
+
+
+inline int Testuint256AdHoc(vector<string> vArg)
+{
+    uint256 g(0);
+
+
+    printf("%s\n", g.ToString().c_str());
+    g--;  printf("g--\n");
+    printf("%s\n", g.ToString().c_str());
+    g--;  printf("g--\n");
+    printf("%s\n", g.ToString().c_str());
+    g++;  printf("g++\n");
+    printf("%s\n", g.ToString().c_str());
+    g++;  printf("g++\n");
+    printf("%s\n", g.ToString().c_str());
+    g++;  printf("g++\n");
+    printf("%s\n", g.ToString().c_str());
+    g++;  printf("g++\n");
+    printf("%s\n", g.ToString().c_str());
+
+
+
+    uint256 a(7);
+    printf("a=7\n");
+    printf("%s\n", a.ToString().c_str());
+
+    uint256 b;
+    printf("b undefined\n");
+    printf("%s\n", b.ToString().c_str());
+    int c = 3;
+
+    a = c;
+    a.pn[3] = 15;
+    printf("%s\n", a.ToString().c_str());
+    uint256 k(c);
+
+    a = 5;
+    a.pn[3] = 15;
+    printf("%s\n", a.ToString().c_str());
+    b = 1;
+    b <<= 52;
+
+    a |= b;
+
+    a ^= 0x500;
+
+    printf("a %s\n", a.ToString().c_str());
+
+    a = a | b | (uint256)0x1000;
+
+
+    printf("a %s\n", a.ToString().c_str());
+    printf("b %s\n", b.ToString().c_str());
+
+    a = 0xfffffffe;
+    a.pn[4] = 9;
+
+    printf("%s\n", a.ToString().c_str());
+    a++;
+    printf("%s\n", a.ToString().c_str());
+    a++;
+    printf("%s\n", a.ToString().c_str());
+    a++;
+    printf("%s\n", a.ToString().c_str());
+    a++;
+    printf("%s\n", a.ToString().c_str());
+
+    a--;
+    printf("%s\n", a.ToString().c_str());
+    a--;
+    printf("%s\n", a.ToString().c_str());
+    a--;
+    printf("%s\n", a.ToString().c_str());
+    uint256 d = a--;
+    printf("%s\n", d.ToString().c_str());
+    printf("%s\n", a.ToString().c_str());
+    a--;
+    printf("%s\n", a.ToString().c_str());
+    a--;
+    printf("%s\n", a.ToString().c_str());
+
+    d = a;
+
+    printf("%s\n", d.ToString().c_str());
+    for (int i = uint256::WIDTH-1; i >= 0; i--) printf("%08x", d.pn[i]); printf("\n");
+
+    uint256 neg = d;
+    neg = ~neg;
+    printf("%s\n", neg.ToString().c_str());
+
+
+    uint256 e = uint256("0xABCDEF123abcdef12345678909832180000011111111");
+    printf("\n");
+    printf("%s\n", e.ToString().c_str());
+
+
+    printf("\n");
+    uint256 x1 = uint256("0xABCDEF123abcdef12345678909832180000011111111");
+    uint256 x2;
+    printf("%s\n", x1.ToString().c_str());
+    for (int i = 0; i < 270; i += 4)
+    {
+        x2 = x1 << i;
+        printf("%s\n", x2.ToString().c_str());
+    }
+
+    printf("\n");
+    printf("%s\n", x1.ToString().c_str());
+    for (int i = 0; i < 270; i += 4)
+    {
+        x2 = x1;
+        x2 >>= i;
+        printf("%s\n", x2.ToString().c_str());
+    }
+
+
+    for (int i = 0; i < 100; i++)
+    {
+        uint256 k = (~uint256(0) >> i);
+        printf("%s\n", k.ToString().c_str());
+    }
+
+    for (int i = 0; i < 100; i++)
+    {
+        uint256 k = (~uint256(0) << i);
+        printf("%s\n", k.ToString().c_str());
+    }
+
+    return (0);
+}