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script: switch to CScriptNum usage for scripts

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This commit is contained in:
Cory Fields 2014-03-26 15:55:35 -04:00
parent 48d8eb1847
commit 27bff74e39
2 changed files with 28 additions and 67 deletions
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44
src/script.cpp
View File

@ -25,22 +25,13 @@ typedef vector<unsigned char> valtype;
static const valtype vchFalse(0);
static const valtype vchZero(0);
static const valtype vchTrue(1, 1);
static const CBigNum bnZero(0);
static const CBigNum bnOne(1);
static const CBigNum bnFalse(0);
static const CBigNum bnTrue(1);
static const size_t nMaxNumSize = 4;
static const CScriptNum bnZero(0);
static const CScriptNum bnOne(1);
static const CScriptNum bnFalse(0);
static const CScriptNum bnTrue(1);
bool CheckSig(vector<unsigned char> vchSig, const vector<unsigned char> &vchPubKey, const CScript &scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, int flags);
CBigNum CastToBigNum(const valtype& vch)
{
if (vch.size() > nMaxNumSize)
throw runtime_error("CastToBigNum() : overflow");
// Get rid of extra leading zeros
return CBigNum(CBigNum(vch).getvch());
}
bool CastToBool(const valtype& vch)
{
for (unsigned int i = 0; i < vch.size(); i++)
@ -306,7 +297,6 @@ bool IsCanonicalSignature(const valtype &vchSig, unsigned int flags) {
bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, unsigned int flags, int nHashType)
{
CAutoBN_CTX pctx;
CScript::const_iterator pc = script.begin();
CScript::const_iterator pend = script.end();
CScript::const_iterator pbegincodehash = script.begin();
@ -380,7 +370,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
case OP_16:
{
// ( -- value)
CBigNum bn((int)opcode - (int)(OP_1 - 1));
CScriptNum bn((int)opcode - (int)(OP_1 - 1));
stack.push_back(bn.getvch());
}
break;
@ -556,7 +546,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
case OP_DEPTH:
{
// -- stacksize
CBigNum bn(stack.size());
CScriptNum bn(stack.size());
stack.push_back(bn.getvch());
}
break;
@ -606,7 +596,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
// (xn ... x2 x1 x0 n - ... x2 x1 x0 xn)
if (stack.size() < 2)
return false;
int n = CastToBigNum(stacktop(-1)).getint();
int n = CScriptNum(stacktop(-1)).getint();
popstack(stack);
if (n < 0 || n >= (int)stack.size())
return false;
@ -654,7 +644,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
// (in -- in size)
if (stack.size() < 1)
return false;
CBigNum bn(stacktop(-1).size());
CScriptNum bn(stacktop(-1).size());
stack.push_back(bn.getvch());
}
break;
@ -705,7 +695,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
// (in -- out)
if (stack.size() < 1)
return false;
CBigNum bn = CastToBigNum(stacktop(-1));
CScriptNum bn(stacktop(-1));
switch (opcode)
{
case OP_1ADD: bn += bnOne; break;
@ -738,9 +728,9 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
// (x1 x2 -- out)
if (stack.size() < 2)
return false;
CBigNum bn1 = CastToBigNum(stacktop(-2));
CBigNum bn2 = CastToBigNum(stacktop(-1));
CBigNum bn;
CScriptNum bn1(stacktop(-2));
CScriptNum bn2(stacktop(-1));
CScriptNum bn(0);
switch (opcode)
{
case OP_ADD:
@ -783,9 +773,9 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
// (x min max -- out)
if (stack.size() < 3)
return false;
CBigNum bn1 = CastToBigNum(stacktop(-3));
CBigNum bn2 = CastToBigNum(stacktop(-2));
CBigNum bn3 = CastToBigNum(stacktop(-1));
CScriptNum bn1(stacktop(-3));
CScriptNum bn2(stacktop(-2));
CScriptNum bn3(stacktop(-1));
bool fValue = (bn2 <= bn1 && bn1 < bn3);
popstack(stack);
popstack(stack);
@ -882,7 +872,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
if ((int)stack.size() < i)
return false;
int nKeysCount = CastToBigNum(stacktop(-i)).getint();
int nKeysCount = CScriptNum(stacktop(-i)).getint();
if (nKeysCount < 0 || nKeysCount > 20)
return false;
nOpCount += nKeysCount;
@ -893,7 +883,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
if ((int)stack.size() < i)
return false;
int nSigsCount = CastToBigNum(stacktop(-i)).getint();
int nSigsCount = CScriptNum(stacktop(-i)).getint();
if (nSigsCount < 0 || nSigsCount > nKeysCount)
return false;
int isig = ++i;

51
src/script.h
View File

@ -374,7 +374,7 @@ const char* GetOpName(opcodetype opcode);
inline std::string ValueString(const std::vector<unsigned char>& vch)
{
if (vch.size() <= 4)
return strprintf("%d", CBigNum(vch).getint());
return strprintf("%d", CScriptNum(vch).getint());
else
return HexStr(vch);
}
@ -410,26 +410,10 @@ protected:
}
else
{
CBigNum bn(n);
*this << bn.getvch();
*this << CScriptNum::serialize(n);
}
return *this;
}
CScript& push_uint64(uint64_t n)
{
if (n >= 1 && n <= 16)
{
push_back(n + (OP_1 - 1));
}
else
{
CBigNum bn(n);
*this << bn.getvch();
}
return *this;
}
public:
CScript() { }
CScript(const CScript& b) : std::vector<unsigned char>(b.begin(), b.end()) { }
@ -452,35 +436,16 @@ public:
}
//explicit CScript(char b) is not portable. Use 'signed char' or 'unsigned char'.
explicit CScript(signed char b) { operator<<(b); }
explicit CScript(short b) { operator<<(b); }
explicit CScript(int b) { operator<<(b); }
explicit CScript(long b) { operator<<(b); }
explicit CScript(long long b) { operator<<(b); }
explicit CScript(unsigned char b) { operator<<(b); }
explicit CScript(unsigned int b) { operator<<(b); }
explicit CScript(unsigned short b) { operator<<(b); }
explicit CScript(unsigned long b) { operator<<(b); }
explicit CScript(unsigned long long b) { operator<<(b); }
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 CBigNum& b) { operator<<(b); }
explicit CScript(const std::vector<unsigned char>& b) { operator<<(b); }
//CScript& operator<<(char b) is not portable. Use 'signed char' or 'unsigned char'.
CScript& operator<<(signed char b) { return push_int64(b); }
CScript& operator<<(short b) { return push_int64(b); }
CScript& operator<<(int b) { return push_int64(b); }
CScript& operator<<(long b) { return push_int64(b); }
CScript& operator<<(long long b) { return push_int64(b); }
CScript& operator<<(unsigned char b) { return push_uint64(b); }
CScript& operator<<(unsigned int b) { return push_uint64(b); }
CScript& operator<<(unsigned short b) { return push_uint64(b); }
CScript& operator<<(unsigned long b) { return push_uint64(b); }
CScript& operator<<(unsigned long long b) { return push_uint64(b); }
CScript& operator<<(int64_t b) { return push_int64(b); }
CScript& operator<<(opcodetype opcode)
{
@ -518,6 +483,12 @@ public:
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)