// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2011 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 H_BITCOIN_SCRIPT
#define H_BITCOIN_SCRIPT
#include <string>
#include <vector>
+#include <boost/foreach.hpp>
+
class CTransaction;
enum
}
- explicit CScript(char b) { operator<<(b); }
+ //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(const std::vector<unsigned char>& b) { operator<<(b); }
- CScript& operator<<(char b) { return push_int64(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); }
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);
+ }
void FindAndDelete(const CScript& b)
{
}
while (GetOp(pc, opcode));
}
-
-
- int GetSigOpCount() const
+ int Find(opcodetype op) const
{
- int n = 0;
- const_iterator pc = begin();
- while (pc < end())
- {
- opcodetype opcode;
- if (!GetOp(pc, opcode))
- break;
- if (opcode == OP_CHECKSIG || opcode == OP_CHECKSIGVERIFY)
- n++;
- else if (opcode == OP_CHECKMULTISIG || opcode == OP_CHECKMULTISIGVERIFY)
- n += 20;
- }
- return n;
+ 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 ...
+ int GetSigOpCount(bool fAccurate=false) const;
+
+ // Accurately count sigOps, including sigOps in
+ // pay-to-script-hash transactions:
+ int GetSigOpCount(const CScript& scriptSig) const;
+
+ bool IsPayToScriptHash() const;
bool IsPushOnly() const
{
+bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, int nHashType);
bool IsStandard(const CScript& scriptPubKey);
bool IsMine(const CKeyStore& keystore, const CScript& scriptPubKey);
bool ExtractAddress(const CScript& scriptPubKey, const CKeyStore* pkeystore, CBitcoinAddress& addressRet);
bool SignSignature(const CKeyStore& keystore, const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL, CScript scriptPrereq=CScript());
-bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, int nHashType=0);
+bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, bool fValidatePayToScriptHash, int nHashType);
#endif