Update License in File Headers

[novacoin.git] / src / script.h

diff --git a/src/script.h b/src/script.h
index 64171c7..bbc6498 100644 (file)
--- a/src/script.h
+++ b/src/script.h
@@ -1,7 +1,7 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2011 The Bitcoin developers
+// Copyright (c) 2009-2012 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
 
@@ -15,6 +15,7 @@
 class CTransaction;
 class CKeyStore;
 
+/** Signature hash types/flags */
 enum
 {
     SIGHASH_ALL = 1,
@@ -36,6 +37,7 @@ enum txnouttype
 
 const char* GetTxnOutputType(txnouttype t);
 
+/** Script opcodes */
 enum opcodetype
 {
     // push value
@@ -158,10 +160,8 @@ enum opcodetype
     OP_CHECKMULTISIG,
     OP_CHECKMULTISIGVERIFY,
 
-    // meta
-    OP_EVAL, // Was OP_NOP1
-
     // expansion
+    OP_NOP1,
     OP_NOP2,
     OP_NOP3,
     OP_NOP4,
@@ -177,7 +177,6 @@ enum opcodetype
     // template matching params
     OP_SMALLINTEGER = 0xfa,
     OP_PUBKEYS = 0xfb,
-    OP_SCRIPTHASH = 0xfc,
     OP_PUBKEYHASH = 0xfd,
     OP_PUBKEY = 0xfe,
 
@@ -215,7 +214,7 @@ inline std::string StackString(const std::vector<std::vector<unsigned char> >& v
 
 
 
-
+/** Serialized script, used inside transaction inputs and outputs */
 class CScript : public std::vector<unsigned char>
 {
 protected:
@@ -269,7 +268,8 @@ public:
     }
 
 
-    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); }
@@ -286,7 +286,8 @@ public:
     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); }
@@ -485,24 +486,18 @@ public:
         return nFound;
     }
 
-    // This method should be removed when a compatibility-breaking block chain split has passed.
-    // Compatibility method for old clients that count sigops differently:
-    int GetSigOpCount() 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;
-    }
+    // 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) const;
+
+    // Accurately count sigOps, including sigOps in
+    // pay-to-script-hash transactions:
+    int GetSigOpCount(const CScript& scriptSig) const;
+
+    bool IsPayToScriptHash() const;
 
     // Called by CTransaction::IsStandard
     bool IsPushOnly() const
@@ -526,7 +521,7 @@ public:
         SetBitcoinAddress(CBitcoinAddress(vchPubKey));
     }
     void SetMultisig(int nRequired, const std::vector<CKey>& keys);
-    void SetEval(const CScript& subscript);
+    void SetPayToScriptHash(const CScript& subscript);
 
 
     void PrintHex() const
@@ -567,14 +562,14 @@ public:
 
 
 
-bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, int nHashType, bool fStrictOpEval, int& nSigOpCountRet);
-
+bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, int nHashType);
 bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<std::vector<unsigned char> >& vSolutionsRet);
+int ScriptSigArgsExpected(txnouttype t, const std::vector<std::vector<unsigned char> >& vSolutions);
 bool IsStandard(const CScript& scriptPubKey);
 bool IsMine(const CKeyStore& keystore, const CScript& scriptPubKey);
 bool ExtractAddress(const CScript& scriptPubKey, CBitcoinAddress& addressRet);
 bool ExtractAddresses(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CBitcoinAddress>& addressRet, int& nRequiredRet);
 bool SignSignature(const CKeyStore& keystore, const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL);
-bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, int& nSigOpCountRet, int nHashType=0, bool fStrictOpEval=true);
+bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, bool fValidatePayToScriptHash, int nHashType);
 
 #endif