From cbd22a50c4b3d2d0f133c5f8d34c9c7aca9c7f4f Mon Sep 17 00:00:00 2001
From: jtimon <jtimon@monetize.io>
Date: Wed, 20 Aug 2014 17:37:40 +0200
Subject: Move CScript class and dependencies to script/script

---
 src/scriptutils.h | 637 +-----------------------------------------------------
 1 file changed, 1 insertion(+), 636 deletions(-)

(limited to 'src/scriptutils.h')

diff --git a/src/scriptutils.h b/src/scriptutils.h
index 44f18483c3..4f29f7ab29 100644
--- a/src/scriptutils.h
+++ b/src/scriptutils.h
@@ -7,172 +7,19 @@
 #define H_BITCOIN_SCRIPTUTILS
 
 #include "key.h"
-#include "utilstrencodings.h"
-#include "tinyformat.h"
+#include "script/script.h"
 
 #include <stdexcept>
 #include <stdint.h>
 #include <string>
 #include <vector>
 
-#include <boost/variant.hpp>
-
 class CKeyStore;
 class CTransaction;
 struct CMutableTransaction;
 
-static const unsigned int MAX_SCRIPT_ELEMENT_SIZE = 520; // bytes
 static const unsigned int MAX_OP_RETURN_RELAY = 40;      // bytes
 
-class scriptnum_error : public std::runtime_error
-{
-public:
-    explicit scriptnum_error(const std::string& str) : std::runtime_error(str) {}
-};
-
-class CScriptNum
-{
-// Numeric opcodes (OP_1ADD, etc) are restricted to operating on 4-byte integers.
-// The semantics are subtle, though: operands must be in the range [-2^31 +1...2^31 -1],
-// but results may overflow (and are valid as long as they are not used in a subsequent
-// numeric operation). CScriptNum enforces those semantics by storing results as
-// an int64 and allowing out-of-range values to be returned as a vector of bytes but
-// throwing an exception if arithmetic is done or the result is interpreted as an integer.
-public:
-
-    explicit CScriptNum(const int64_t& n)
-    {
-        m_value = n;
-    }
-
-    explicit CScriptNum(const std::vector<unsigned char>& vch)
-    {
-        if (vch.size() > nMaxNumSize)
-            throw scriptnum_error("CScriptNum(const std::vector<unsigned char>&) : overflow");
-        m_value = set_vch(vch);
-    }
-
-    inline bool operator==(const int64_t& rhs) const    { return m_value == rhs; }
-    inline bool operator!=(const int64_t& rhs) const    { return m_value != rhs; }
-    inline bool operator<=(const int64_t& rhs) const    { return m_value <= rhs; }
-    inline bool operator< (const int64_t& rhs) const    { return m_value <  rhs; }
-    inline bool operator>=(const int64_t& rhs) const    { return m_value >= rhs; }
-    inline bool operator> (const int64_t& rhs) const    { return m_value >  rhs; }
-
-    inline bool operator==(const CScriptNum& rhs) const { return operator==(rhs.m_value); }
-    inline bool operator!=(const CScriptNum& rhs) const { return operator!=(rhs.m_value); }
-    inline bool operator<=(const CScriptNum& rhs) const { return operator<=(rhs.m_value); }
-    inline bool operator< (const CScriptNum& rhs) const { return operator< (rhs.m_value); }
-    inline bool operator>=(const CScriptNum& rhs) const { return operator>=(rhs.m_value); }
-    inline bool operator> (const CScriptNum& rhs) const { return operator> (rhs.m_value); }
-
-    inline CScriptNum operator+(   const int64_t& rhs)    const { return CScriptNum(m_value + rhs);}
-    inline CScriptNum operator-(   const int64_t& rhs)    const { return CScriptNum(m_value - rhs);}
-    inline CScriptNum operator+(   const CScriptNum& rhs) const { return operator+(rhs.m_value);   }
-    inline CScriptNum operator-(   const CScriptNum& rhs) const { return operator-(rhs.m_value);   }
-
-    inline CScriptNum& operator+=( const CScriptNum& rhs)       { return operator+=(rhs.m_value);  }
-    inline CScriptNum& operator-=( const CScriptNum& rhs)       { return operator-=(rhs.m_value);  }
-
-    inline CScriptNum operator-()                         const
-    {
-        assert(m_value != std::numeric_limits<int64_t>::min());
-        return CScriptNum(-m_value);
-    }
-
-    inline CScriptNum& operator=( const int64_t& rhs)
-    {
-        m_value = rhs;
-        return *this;
-    }
-
-    inline CScriptNum& operator+=( const int64_t& rhs)
-    {
-        assert(rhs == 0 || (rhs > 0 && m_value <= std::numeric_limits<int64_t>::max() - rhs) ||
-                           (rhs < 0 && m_value >= std::numeric_limits<int64_t>::min() - rhs));
-        m_value += rhs;
-        return *this;
-    }
-
-    inline CScriptNum& operator-=( const int64_t& rhs)
-    {
-        assert(rhs == 0 || (rhs > 0 && m_value >= std::numeric_limits<int64_t>::min() + rhs) ||
-                           (rhs < 0 && m_value <= std::numeric_limits<int64_t>::max() + rhs));
-        m_value -= rhs;
-        return *this;
-    }
-
-    int getint() const
-    {
-        if (m_value > std::numeric_limits<int>::max())
-            return std::numeric_limits<int>::max();
-        else if (m_value < std::numeric_limits<int>::min())
-            return std::numeric_limits<int>::min();
-        return m_value;
-    }
-
-    std::vector<unsigned char> getvch() const
-    {
-        return serialize(m_value);
-    }
-
-    static std::vector<unsigned char> serialize(const int64_t& value)
-    {
-        if(value == 0)
-            return std::vector<unsigned char>();
-
-        std::vector<unsigned char> result;
-        const bool neg = value < 0;
-        uint64_t absvalue = neg ? -value : value;
-
-        while(absvalue)
-        {
-            result.push_back(absvalue & 0xff);
-            absvalue >>= 8;
-        }
-
-
-//    - If the most significant byte is >= 0x80 and the value is positive, push a
-//    new zero-byte to make the significant byte < 0x80 again.
-
-//    - If the most significant byte is >= 0x80 and the value is negative, push a
-//    new 0x80 byte that will be popped off when converting to an integral.
-
-//    - If the most significant byte is < 0x80 and the value is negative, add
-//    0x80 to it, since it will be subtracted and interpreted as a negative when
-//    converting to an integral.
-
-        if (result.back() & 0x80)
-            result.push_back(neg ? 0x80 : 0);
-        else if (neg)
-            result.back() |= 0x80;
-
-        return result;
-    }
-
-    static const size_t nMaxNumSize = 4;
-
-private:
-    static int64_t set_vch(const std::vector<unsigned char>& vch)
-    {
-      if (vch.empty())
-          return 0;
-
-      int64_t result = 0;
-      for (size_t i = 0; i != vch.size(); ++i)
-          result |= static_cast<int64_t>(vch[i]) << 8*i;
-
-      // If the input vector's most significant byte is 0x80, remove it from
-      // the result's msb and return a negative.
-      if (vch.back() & 0x80)
-          return -(result & ~(0x80ULL << (8 * (vch.size() - 1))));
-
-      return result;
-    }
-
-    int64_t m_value;
-};
-
 /** Signature hash types/flags */
 enum
 {
@@ -234,490 +81,8 @@ enum txnouttype
     TX_NULL_DATA,
 };
 
-class CNoDestination {
-public:
-    friend bool operator==(const CNoDestination &a, const CNoDestination &b) { return true; }
-    friend bool operator<(const CNoDestination &a, const CNoDestination &b) { return true; }
-};
-
-/** A txout script template with a specific destination. It is either:
- *  * CNoDestination: no destination set
- *  * CKeyID: TX_PUBKEYHASH destination
- *  * CScriptID: TX_SCRIPTHASH destination
- *  A CTxDestination is the internal data type encoded in a CBitcoinAddress
- */
-typedef boost::variant<CNoDestination, CKeyID, CScriptID> CTxDestination;
-
 const char* GetTxnOutputType(txnouttype t);
 
-/** Script opcodes */
-enum opcodetype
-{
-    // push value
-    OP_0 = 0x00,
-    OP_FALSE = OP_0,
-    OP_PUSHDATA1 = 0x4c,
-    OP_PUSHDATA2 = 0x4d,
-    OP_PUSHDATA4 = 0x4e,
-    OP_1NEGATE = 0x4f,
-    OP_RESERVED = 0x50,
-    OP_1 = 0x51,
-    OP_TRUE=OP_1,
-    OP_2 = 0x52,
-    OP_3 = 0x53,
-    OP_4 = 0x54,
-    OP_5 = 0x55,
-    OP_6 = 0x56,
-    OP_7 = 0x57,
-    OP_8 = 0x58,
-    OP_9 = 0x59,
-    OP_10 = 0x5a,
-    OP_11 = 0x5b,
-    OP_12 = 0x5c,
-    OP_13 = 0x5d,
-    OP_14 = 0x5e,
-    OP_15 = 0x5f,
-    OP_16 = 0x60,
-
-    // control
-    OP_NOP = 0x61,
-    OP_VER = 0x62,
-    OP_IF = 0x63,
-    OP_NOTIF = 0x64,
-    OP_VERIF = 0x65,
-    OP_VERNOTIF = 0x66,
-    OP_ELSE = 0x67,
-    OP_ENDIF = 0x68,
-    OP_VERIFY = 0x69,
-    OP_RETURN = 0x6a,
-
-    // stack ops
-    OP_TOALTSTACK = 0x6b,
-    OP_FROMALTSTACK = 0x6c,
-    OP_2DROP = 0x6d,
-    OP_2DUP = 0x6e,
-    OP_3DUP = 0x6f,
-    OP_2OVER = 0x70,
-    OP_2ROT = 0x71,
-    OP_2SWAP = 0x72,
-    OP_IFDUP = 0x73,
-    OP_DEPTH = 0x74,
-    OP_DROP = 0x75,
-    OP_DUP = 0x76,
-    OP_NIP = 0x77,
-    OP_OVER = 0x78,
-    OP_PICK = 0x79,
-    OP_ROLL = 0x7a,
-    OP_ROT = 0x7b,
-    OP_SWAP = 0x7c,
-    OP_TUCK = 0x7d,
-
-    // splice ops
-    OP_CAT = 0x7e,
-    OP_SUBSTR = 0x7f,
-    OP_LEFT = 0x80,
-    OP_RIGHT = 0x81,
-    OP_SIZE = 0x82,
-
-    // bit logic
-    OP_INVERT = 0x83,
-    OP_AND = 0x84,
-    OP_OR = 0x85,
-    OP_XOR = 0x86,
-    OP_EQUAL = 0x87,
-    OP_EQUALVERIFY = 0x88,
-    OP_RESERVED1 = 0x89,
-    OP_RESERVED2 = 0x8a,
-
-    // numeric
-    OP_1ADD = 0x8b,
-    OP_1SUB = 0x8c,
-    OP_2MUL = 0x8d,
-    OP_2DIV = 0x8e,
-    OP_NEGATE = 0x8f,
-    OP_ABS = 0x90,
-    OP_NOT = 0x91,
-    OP_0NOTEQUAL = 0x92,
-
-    OP_ADD = 0x93,
-    OP_SUB = 0x94,
-    OP_MUL = 0x95,
-    OP_DIV = 0x96,
-    OP_MOD = 0x97,
-    OP_LSHIFT = 0x98,
-    OP_RSHIFT = 0x99,
-
-    OP_BOOLAND = 0x9a,
-    OP_BOOLOR = 0x9b,
-    OP_NUMEQUAL = 0x9c,
-    OP_NUMEQUALVERIFY = 0x9d,
-    OP_NUMNOTEQUAL = 0x9e,
-    OP_LESSTHAN = 0x9f,
-    OP_GREATERTHAN = 0xa0,
-    OP_LESSTHANOREQUAL = 0xa1,
-    OP_GREATERTHANOREQUAL = 0xa2,
-    OP_MIN = 0xa3,
-    OP_MAX = 0xa4,
-
-    OP_WITHIN = 0xa5,
-
-    // crypto
-    OP_RIPEMD160 = 0xa6,
-    OP_SHA1 = 0xa7,
-    OP_SHA256 = 0xa8,
-    OP_HASH160 = 0xa9,
-    OP_HASH256 = 0xaa,
-    OP_CODESEPARATOR = 0xab,
-    OP_CHECKSIG = 0xac,
-    OP_CHECKSIGVERIFY = 0xad,
-    OP_CHECKMULTISIG = 0xae,
-    OP_CHECKMULTISIGVERIFY = 0xaf,
-
-    // expansion
-    OP_NOP1 = 0xb0,
-    OP_NOP2 = 0xb1,
-    OP_NOP3 = 0xb2,
-    OP_NOP4 = 0xb3,
-    OP_NOP5 = 0xb4,
-    OP_NOP6 = 0xb5,
-    OP_NOP7 = 0xb6,
-    OP_NOP8 = 0xb7,
-    OP_NOP9 = 0xb8,
-    OP_NOP10 = 0xb9,
-
-
-
-    // template matching params
-    OP_SMALLDATA = 0xf9,
-    OP_SMALLINTEGER = 0xfa,
-    OP_PUBKEYS = 0xfb,
-    OP_PUBKEYHASH = 0xfd,
-    OP_PUBKEY = 0xfe,
-
-    OP_INVALIDOPCODE = 0xff,
-};
-
-const char* GetOpName(opcodetype opcode);
-
-
-
-inline std::string ValueString(const std::vector<unsigned char>& vch)
-{
-    if (vch.size() <= 4)
-        return strprintf("%d", CScriptNum(vch).getint());
-    else
-        return HexStr(vch);
-}
-
-/** Serialized script, used inside transaction inputs and outputs */
-class CScript : public std::vector<unsigned char>
-{
-protected:
-    CScript& push_int64(int64_t n)
-    {
-        if (n == -1 || (n >= 1 && n <= 16))
-        {
-            push_back(n + (OP_1 - 1));
-        }
-        else
-        {
-            *this << CScriptNum::serialize(n);
-        }
-        return *this;
-    }
-public:
-    CScript() { }
-    CScript(const CScript& b) : std::vector<unsigned char>(b.begin(), b.end()) { }
-    CScript(const_iterator pbegin, const_iterator pend) : std::vector<unsigned char>(pbegin, pend) { }
-#ifndef _MSC_VER
-    CScript(const unsigned char* pbegin, const unsigned char* pend) : std::vector<unsigned char>(pbegin, pend) { }
-#endif
-
-    CScript& operator+=(const CScript& b)
-    {
-        insert(end(), b.begin(), b.end());
-        return *this;
-    }
-
-    friend CScript operator+(const CScript& a, const CScript& b)
-    {
-        CScript ret = a;
-        ret += b;
-        return ret;
-    }
-
-
-    CScript(int64_t b)        { operator<<(b); }
-
-    explicit CScript(opcodetype b)     { operator<<(b); }
-    explicit CScript(const uint256& b) { operator<<(b); }
-    explicit CScript(const CScriptNum& b) { operator<<(b); }
-    explicit CScript(const std::vector<unsigned char>& b) { operator<<(b); }
-
-
-    CScript& operator<<(int64_t b) { return push_int64(b); }
-
-    CScript& operator<<(opcodetype opcode)
-    {
-        if (opcode < 0 || opcode > 0xff)
-            throw std::runtime_error("CScript::operator<<() : invalid opcode");
-        insert(end(), (unsigned char)opcode);
-        return *this;
-    }
-
-    CScript& operator<<(const uint160& b)
-    {
-        insert(end(), sizeof(b));
-        insert(end(), (unsigned char*)&b, (unsigned char*)&b + sizeof(b));
-        return *this;
-    }
-
-    CScript& operator<<(const uint256& b)
-    {
-        insert(end(), sizeof(b));
-        insert(end(), (unsigned char*)&b, (unsigned char*)&b + sizeof(b));
-        return *this;
-    }
-
-    CScript& operator<<(const CPubKey& key)
-    {
-        assert(key.size() < OP_PUSHDATA1);
-        insert(end(), (unsigned char)key.size());
-        insert(end(), key.begin(), key.end());
-        return *this;
-    }
-
-    CScript& operator<<(const CScriptNum& b)
-    {
-        *this << b.getvch();
-        return *this;
-    }
-
-    CScript& operator<<(const std::vector<unsigned char>& b)
-    {
-        if (b.size() < OP_PUSHDATA1)
-        {
-            insert(end(), (unsigned char)b.size());
-        }
-        else if (b.size() <= 0xff)
-        {
-            insert(end(), OP_PUSHDATA1);
-            insert(end(), (unsigned char)b.size());
-        }
-        else if (b.size() <= 0xffff)
-        {
-            insert(end(), OP_PUSHDATA2);
-            unsigned short nSize = b.size();
-            insert(end(), (unsigned char*)&nSize, (unsigned char*)&nSize + sizeof(nSize));
-        }
-        else
-        {
-            insert(end(), OP_PUSHDATA4);
-            unsigned int nSize = b.size();
-            insert(end(), (unsigned char*)&nSize, (unsigned char*)&nSize + sizeof(nSize));
-        }
-        insert(end(), b.begin(), b.end());
-        return *this;
-    }
-
-    CScript& operator<<(const CScript& b)
-    {
-        // I'm not sure if this should push the script or concatenate scripts.
-        // If there's ever a use for pushing a script onto a script, delete this member fn
-        assert(!"Warning: Pushing a CScript onto a CScript with << is probably not intended, use + to concatenate!");
-        return *this;
-    }
-
-
-    bool GetOp(iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>& vchRet)
-    {
-         // Wrapper so it can be called with either iterator or const_iterator
-         const_iterator pc2 = pc;
-         bool fRet = GetOp2(pc2, opcodeRet, &vchRet);
-         pc = begin() + (pc2 - begin());
-         return fRet;
-    }
-
-    bool GetOp(iterator& pc, opcodetype& opcodeRet)
-    {
-         const_iterator pc2 = pc;
-         bool fRet = GetOp2(pc2, opcodeRet, NULL);
-         pc = begin() + (pc2 - begin());
-         return fRet;
-    }
-
-    bool GetOp(const_iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>& vchRet) const
-    {
-        return GetOp2(pc, opcodeRet, &vchRet);
-    }
-
-    bool GetOp(const_iterator& pc, opcodetype& opcodeRet) const
-    {
-        return GetOp2(pc, opcodeRet, NULL);
-    }
-
-    bool GetOp2(const_iterator& pc, opcodetype& opcodeRet, std::vector<unsigned char>* pvchRet) const
-    {
-        opcodeRet = OP_INVALIDOPCODE;
-        if (pvchRet)
-            pvchRet->clear();
-        if (pc >= end())
-            return false;
-
-        // Read instruction
-        if (end() - pc < 1)
-            return false;
-        unsigned int opcode = *pc++;
-
-        // Immediate operand
-        if (opcode <= OP_PUSHDATA4)
-        {
-            unsigned int nSize = 0;
-            if (opcode < OP_PUSHDATA1)
-            {
-                nSize = opcode;
-            }
-            else if (opcode == OP_PUSHDATA1)
-            {
-                if (end() - pc < 1)
-                    return false;
-                nSize = *pc++;
-            }
-            else if (opcode == OP_PUSHDATA2)
-            {
-                if (end() - pc < 2)
-                    return false;
-                nSize = 0;
-                memcpy(&nSize, &pc[0], 2);
-                pc += 2;
-            }
-            else if (opcode == OP_PUSHDATA4)
-            {
-                if (end() - pc < 4)
-                    return false;
-                memcpy(&nSize, &pc[0], 4);
-                pc += 4;
-            }
-            if (end() - pc < 0 || (unsigned int)(end() - pc) < nSize)
-                return false;
-            if (pvchRet)
-                pvchRet->assign(pc, pc + nSize);
-            pc += nSize;
-        }
-
-        opcodeRet = (opcodetype)opcode;
-        return true;
-    }
-
-    // Encode/decode small integers:
-    static int DecodeOP_N(opcodetype opcode)
-    {
-        if (opcode == OP_0)
-            return 0;
-        assert(opcode >= OP_1 && opcode <= OP_16);
-        return (int)opcode - (int)(OP_1 - 1);
-    }
-    static opcodetype EncodeOP_N(int n)
-    {
-        assert(n >= 0 && n <= 16);
-        if (n == 0)
-            return OP_0;
-        return (opcodetype)(OP_1+n-1);
-    }
-
-    int FindAndDelete(const CScript& b)
-    {
-        int nFound = 0;
-        if (b.empty())
-            return nFound;
-        iterator pc = begin();
-        opcodetype opcode;
-        do
-        {
-            while (end() - pc >= (long)b.size() && memcmp(&pc[0], &b[0], b.size()) == 0)
-            {
-                erase(pc, pc + b.size());
-                ++nFound;
-            }
-        }
-        while (GetOp(pc, opcode));
-        return nFound;
-    }
-    int Find(opcodetype op) const
-    {
-        int nFound = 0;
-        opcodetype opcode;
-        for (const_iterator pc = begin(); pc != end() && GetOp(pc, opcode);)
-            if (opcode == op)
-                ++nFound;
-        return nFound;
-    }
-
-    // Pre-version-0.6, Bitcoin always counted CHECKMULTISIGs
-    // as 20 sigops. With pay-to-script-hash, that changed:
-    // CHECKMULTISIGs serialized in scriptSigs are
-    // counted more accurately, assuming they are of the form
-    //  ... OP_N CHECKMULTISIG ...
-    unsigned int GetSigOpCount(bool fAccurate) const;
-
-    // Accurately count sigOps, including sigOps in
-    // pay-to-script-hash transactions:
-    unsigned int GetSigOpCount(const CScript& scriptSig) const;
-
-    bool IsPayToScriptHash() const;
-
-    // Called by IsStandardTx and P2SH VerifyScript (which makes it consensus-critical).
-    bool IsPushOnly() const;
-
-    // Called by IsStandardTx.
-    bool HasCanonicalPushes() const;
-
-    // Returns whether the script is guaranteed to fail at execution,
-    // regardless of the initial stack. This allows outputs to be pruned
-    // instantly when entering the UTXO set.
-    bool IsUnspendable() const
-    {
-        return (size() > 0 && *begin() == OP_RETURN);
-    }
-
-    void SetDestination(const CTxDestination& address);
-    void SetMultisig(int nRequired, const std::vector<CPubKey>& keys);
-
-    std::string ToString() const
-    {
-        std::string str;
-        opcodetype opcode;
-        std::vector<unsigned char> vch;
-        const_iterator pc = begin();
-        while (pc < end())
-        {
-            if (!str.empty())
-                str += " ";
-            if (!GetOp(pc, opcode, vch))
-            {
-                str += "[error]";
-                return str;
-            }
-            if (0 <= opcode && opcode <= OP_PUSHDATA4)
-                str += ValueString(vch);
-            else
-                str += GetOpName(opcode);
-        }
-        return str;
-    }
-
-    CScriptID GetID() const
-    {
-        return CScriptID(Hash160(*this));
-    }
-
-    void clear()
-    {
-        // The default std::vector::clear() does not release memory.
-        std::vector<unsigned char>().swap(*this);
-    }
-};
-
 /** Compact serializer for scripts.
  *
  *  It detects common cases and encodes them much more efficiently.
-- 
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