move debug.log and db.log to data dir, portable GetDataDir, optimize GetBalance, fix repaint bogdown, -addnode and -? switches

main.h

@@ -34,7 +34,6 @@ extern int nBestHeight;
 extern uint256 hashBestChain;
 extern CBlockIndex* pindexBest;
 extern unsigned int nTransactionsUpdated;
-extern string strSetDataDir;
 extern int nDropMessagesTest;
 
 // Settings
@@ -50,7 +49,6 @@ extern int nLimitProcessors;
 
 
 
-string GetAppDir();
 bool CheckDiskSpace(int64 nAdditionalBytes=0);
 FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode="rb");
 FILE* AppendBlockFile(unsigned int& nFileRet);
@@ -405,10 +403,10 @@ public:
     {
         // Time based nLockTime implemented in 0.1.6,
         // do not use time based until most 0.1.5 nodes have upgraded.
-        if (nBlockTime == 0)
-            nBlockTime = GetAdjustedTime();
         if (nLockTime == 0)
             return true;
+        if (nBlockTime == 0)
+            nBlockTime = GetAdjustedTime();
         if (nLockTime < (nLockTime < 500000000 ? nBestHeight : nBlockTime))
             return true;
         foreach(const CTxIn& txin, vin)
@@ -627,6 +625,8 @@ public:
 
     // memory only
     mutable bool fMerkleVerified;
+    mutable bool fGetCreditCached;
+    mutable int64 nGetCreditCached;
 
 
     CMerkleTx()
@@ -644,14 +644,22 @@ public:
         hashBlock = 0;
         nIndex = -1;
         fMerkleVerified = false;
+        fGetCreditCached = false;
+        nGetCreditCached = 0;
     }
 
-    int64 GetCredit() const
+    int64 GetCredit(bool fUseCache=false) const
     {
         // Must wait until coinbase is safely deep enough in the chain before valuing it
         if (IsCoinBase() && GetBlocksToMaturity() > 0)
             return 0;
-        return CTransaction::GetCredit();
+
+        // GetBalance can assume transactions in mapWallet won't change
+        if (fUseCache && fGetCreditCached)
+            return nGetCreditCached;
+        nGetCreditCached = CTransaction::GetCredit();
+        fGetCreditCached = true;
+        return nGetCreditCached;
     }
 
     IMPLEMENT_SERIALIZE