Fix loop index var types, fixing many minor sign comparison warnings

foo.size() typically returns an unsigned integral type; make loop variables
match those types' signedness.

7 files changed, 38 insertions, 38 deletions

diff --git a/src/main.cpp b/src/main.cpp
index f13b884f96..76e0783794 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -389,7 +389,7 @@ bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMi
 
     // Check for conflicts with in-memory transactions
     CTransaction* ptxOld = NULL;
-    for (int i = 0; i < vin.size(); i++)
+    for (unsigned int i = 0; i < vin.size(); i++)
     {
         COutPoint outpoint = vin[i].prevout;
         if (mapNextTx.count(outpoint))
@@ -405,7 +405,7 @@ bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMi
                 return false;
             if (!IsNewerThan(*ptxOld))
                 return false;
-            for (int i = 0; i < vin.size(); i++)
+            for (unsigned int i = 0; i < vin.size(); i++)
             {
                 COutPoint outpoint = vin[i].prevout;
                 if (!mapNextTx.count(outpoint) || mapNextTx[outpoint].ptx != ptxOld)
@@ -511,7 +511,7 @@ bool CTransaction::AddToMemoryPoolUnchecked()
     {
         uint256 hash = GetHash();
         mapTransactions[hash] = *this;
-        for (int i = 0; i < vin.size(); i++)
+        for (unsigned int i = 0; i < vin.size(); i++)
             mapNextTx[vin[i].prevout] = CInPoint(&mapTransactions[hash], i);
         nTransactionsUpdated++;
     }
@@ -884,7 +884,7 @@ bool CTransaction::FetchInputs(CTxDB& txdb, const map<uint256, CTxIndex>& mapTes
     if (IsCoinBase())
         return true; // Coinbase transactions have no inputs to fetch.
 
-    for (int i = 0; i < vin.size(); i++)
+    for (unsigned int i = 0; i < vin.size(); i++)
     {
         COutPoint prevout = vin[i].prevout;
         if (inputsRet.count(prevout.hash))
@@ -929,7 +929,7 @@ bool CTransaction::FetchInputs(CTxDB& txdb, const map<uint256, CTxIndex>& mapTes
     }
 
     // Make sure all prevout.n's are valid:
-    for (int i = 0; i < vin.size(); i++)
+    for (unsigned int i = 0; i < vin.size(); i++)
     {
         const COutPoint prevout = vin[i].prevout;
         assert(inputsRet.count(prevout.hash) != 0);
@@ -966,7 +966,7 @@ int64 CTransaction::GetValueIn(const MapPrevTx& inputs) const
         return 0;
 
     int64 nResult = 0;
-    for (int i = 0; i < vin.size(); i++)
+    for (unsigned int i = 0; i < vin.size(); i++)
     {
         nResult += GetOutputFor(vin[i], inputs).nValue;
     }
@@ -980,7 +980,7 @@ int CTransaction::GetP2SHSigOpCount(const MapPrevTx& inputs) const
         return 0;
 
     int nSigOps = 0;
-    for (int i = 0; i < vin.size(); i++)
+    for (unsigned int i = 0; i < vin.size(); i++)
     {
         const CTxOut& prevout = GetOutputFor(vin[i], inputs);
         if (prevout.scriptPubKey.IsPayToScriptHash())
@@ -1001,7 +1001,7 @@ bool CTransaction::ConnectInputs(MapPrevTx inputs,
     {
         int64 nValueIn = 0;
         int64 nFees = 0;
-        for (int i = 0; i < vin.size(); i++)
+        for (unsigned int i = 0; i < vin.size(); i++)
         {
             COutPoint prevout = vin[i].prevout;
             assert(inputs.count(prevout.hash) > 0);
@@ -1073,7 +1073,7 @@ bool CTransaction::ClientConnectInputs()
     CRITICAL_BLOCK(cs_mapTransactions)
     {
         int64 nValueIn = 0;
-        for (int i = 0; i < vin.size(); i++)
+        for (unsigned int i = 0; i < vin.size(); i++)
         {
             // Get prev tx from single transactions in memory
             COutPoint prevout = vin[i].prevout;
@@ -1284,7 +1284,7 @@ bool static Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
 
     // Connect longer branch
     vector<CTransaction> vDelete;
-    for (int i = 0; i < vConnect.size(); i++)
+    for (unsigned int i = 0; i < vConnect.size(); i++)
     {
         CBlockIndex* pindex = vConnect[i];
         CBlock block;
@@ -1463,7 +1463,7 @@ bool CBlock::CheckBlock() const
     // First transaction must be coinbase, the rest must not be
     if (vtx.empty() || !vtx[0].IsCoinBase())
         return error("CheckBlock() : first tx is not coinbase");
-    for (int i = 1; i < vtx.size(); i++)
+    for (unsigned int i = 1; i < vtx.size(); i++)
         if (vtx[i].IsCoinBase())
             return error("CheckBlock() : more than one coinbase");
 
@@ -1589,7 +1589,7 @@ bool static ProcessBlock(CNode* pfrom, CBlock* pblock)
     // Recursively process any orphan blocks that depended on this one
     vector<uint256> vWorkQueue;
     vWorkQueue.push_back(hash);
-    for (int i = 0; i < vWorkQueue.size(); i++)
+    for (unsigned int i = 0; i < vWorkQueue.size(); i++)
     {
         uint256 hashPrev = vWorkQueue[i];
         for (multimap<uint256, CBlock*>::iterator mi = mapOrphanBlocksByPrev.lower_bound(hashPrev);
@@ -1813,7 +1813,7 @@ void PrintBlockTree()
 
         // put the main timechain first
         vector<CBlockIndex*>& vNext = mapNext[pindex];
-        for (int i = 0; i < vNext.size(); i++)
+        for (unsigned int i = 0; i < vNext.size(); i++)
         {
             if (vNext[i]->pnext)
             {
@@ -1823,7 +1823,7 @@ void PrintBlockTree()
         }
 
         // iterate children
-        for (int i = 0; i < vNext.size(); i++)
+        for (unsigned int i = 0; i < vNext.size(); i++)
             vStack.push_back(make_pair(nCol+i, vNext[i]));
     }
 }
@@ -2335,7 +2335,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
             vWorkQueue.push_back(inv.hash);
 
             // Recursively process any orphan transactions that depended on this one
-            for (int i = 0; i < vWorkQueue.size(); i++)
+            for (unsigned int i = 0; i < vWorkQueue.size(); i++)
             {
                 uint256 hashPrev = vWorkQueue[i];
                 for (multimap<uint256, CDataStream*>::iterator mi = mapOrphanTransactionsByPrev.lower_bound(hashPrev);
@@ -3112,7 +3112,7 @@ void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash
     FormatHashBlocks(&tmp.hash1, sizeof(tmp.hash1));
 
     // Byte swap all the input buffer
-    for (int i = 0; i < sizeof(tmp)/4; i++)
+    for (unsigned int i = 0; i < sizeof(tmp)/4; i++)
         ((unsigned int*)&tmp)[i] = ByteReverse(((unsigned int*)&tmp)[i]);
 
     // Precalc the first half of the first hash, which stays constant
@@ -3234,7 +3234,7 @@ void static BitcoinMiner(CWallet *pwallet)
             // Check if something found
             if (nNonceFound != -1)
             {
-                for (int i = 0; i < sizeof(hash)/4; i++)
+                for (unsigned int i = 0; i < sizeof(hash)/4; i++)
                     ((unsigned int*)&hash)[i] = ByteReverse(((unsigned int*)&hash)[i]);
 
                 if (hash <= hashTarget)
diff --git a/src/main.h b/src/main.h
index b0f713e876..de674b5bb1 100644
--- a/src/main.h
+++ b/src/main.h
@@ -455,13 +455,13 @@ public:
     {
         if (vin.size() != old.vin.size())
             return false;
-        for (int i = 0; i < vin.size(); i++)
+        for (unsigned int i = 0; i < vin.size(); i++)
             if (vin[i].prevout != old.vin[i].prevout)
                 return false;
 
         bool fNewer = false;
         unsigned int nLowest = UINT_MAX;
-        for (int i = 0; i < vin.size(); i++)
+        for (unsigned int i = 0; i < vin.size(); i++)
         {
             if (vin[i].nSequence != old.vin[i].nSequence)
             {
@@ -636,9 +636,9 @@ public:
             vin.size(),
             vout.size(),
             nLockTime);
-        for (int i = 0; i < vin.size(); i++)
+        for (unsigned int i = 0; i < vin.size(); i++)
             str += "    " + vin[i].ToString() + "\n";
-        for (int i = 0; i < vout.size(); i++)
+        for (unsigned int i = 0; i < vout.size(); i++)
             str += "    " + vout[i].ToString() + "\n";
         return str;
     }
@@ -1012,13 +1012,13 @@ public:
             hashMerkleRoot.ToString().substr(0,10).c_str(),
             nTime, nBits, nNonce,
             vtx.size());
-        for (int i = 0; i < vtx.size(); i++)
+        for (unsigned int i = 0; i < vtx.size(); i++)
         {
             printf("  ");
             vtx[i].print();
         }
         printf("  vMerkleTree: ");
-        for (int i = 0; i < vMerkleTree.size(); i++)
+        for (unsigned int i = 0; i < vMerkleTree.size(); i++)
             printf("%s ", vMerkleTree[i].ToString().substr(0,10).c_str());
         printf("\n");
     }
diff --git a/src/net.cpp b/src/net.cpp
index 38fd3b5a14..92ccb1e880 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -869,7 +869,7 @@ void ThreadSocketHandler2(void* parg)
             if (hSocketMax > -1)
             {
                 printf("socket select error %d\n", nErr);
-                for (int i = 0; i <= hSocketMax; i++)
+                for (unsigned int i = 0; i <= hSocketMax; i++)
                     FD_SET(i, &fdsetRecv);
             }
             FD_ZERO(&fdsetSend);
@@ -1252,7 +1252,7 @@ void ThreadDNSAddressSeed2(void* parg)
     {
         printf("Loading addresses from DNS seeds (could take a while)\n");
 
-        for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
+        for (unsigned int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
             vector<CAddress> vaddr;
             if (Lookup(strDNSSeed[seed_idx], vaddr, NODE_NETWORK, -1, true))
             {
@@ -1469,7 +1469,7 @@ void ThreadOpenConnections2(void* parg)
 
         if (fAddSeeds)
         {
-            for (int i = 0; i < ARRAYLEN(pnSeed); i++)
+            for (unsigned int i = 0; i < ARRAYLEN(pnSeed); i++)
             {
                 // It'll only connect to one or two seed nodes because once it connects,
                 // it'll get a pile of addresses with newer timestamps.
diff --git a/src/protocol.cpp b/src/protocol.cpp
index 48784b9cfb..a3e54ebc3d 100644
--- a/src/protocol.cpp
+++ b/src/protocol.cpp
@@ -270,7 +270,7 @@ CInv::CInv(int typeIn, const uint256& hashIn)
 
 CInv::CInv(const std::string& strType, const uint256& hashIn)
 {
-    int i;
+    unsigned int i;
     for (i = 1; i < ARRAYLEN(ppszTypeName); i++)
     {
         if (strType == ppszTypeName[i])
diff --git a/src/uint256.h b/src/uint256.h
index 07809e49a8..bbdba99533 100644
--- a/src/uint256.h
+++ b/src/uint256.h
@@ -294,7 +294,7 @@ public:
     std::string GetHex() const
     {
         char psz[sizeof(pn)*2 + 1];
-        for (int i = 0; i < sizeof(pn); i++)
+        for (unsigned int i = 0; i < sizeof(pn); i++)
             sprintf(psz + i*2, "%02x", ((unsigned char*)pn)[sizeof(pn) - i - 1]);
         return std::string(psz, psz + sizeof(pn)*2);
     }
diff --git a/src/wallet.cpp b/src/wallet.cpp
index 3f51313e9b..b3eb06a3f6 100644
--- a/src/wallet.cpp
+++ b/src/wallet.cpp
@@ -512,7 +512,7 @@ void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
         {
             map<uint256, const CMerkleTx*> mapWalletPrev;
             set<uint256> setAlreadyDone;
-            for (int i = 0; i < vWorkQueue.size(); i++)
+            for (unsigned int i = 0; i < vWorkQueue.size(); i++)
             {
                 uint256 hash = vWorkQueue[i];
                 if (setAlreadyDone.count(hash))
@@ -607,7 +607,7 @@ void CWallet::ReacceptWalletTransactions()
                     printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
                     continue;
                 }
-                for (int i = 0; i < txindex.vSpent.size(); i++)
+                for (unsigned int i = 0; i < txindex.vSpent.size(); i++)
                 {
                     if (wtx.IsSpent(i))
                         continue;
@@ -771,7 +771,7 @@ bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfThe
             if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
                 continue;
 
-            for (int i = 0; i < pcoin->vout.size(); i++)
+            for (unsigned int i = 0; i < pcoin->vout.size(); i++)
             {
                 if (pcoin->IsSpent(i) || !IsMine(pcoin->vout[i]))
                     continue;
@@ -804,7 +804,7 @@ bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfThe
 
     if (nTotalLower == nTargetValue || nTotalLower == nTargetValue + CENT)
     {
-        for (int i = 0; i < vValue.size(); ++i)
+        for (unsigned int i = 0; i < vValue.size(); ++i)
         {
             setCoinsRet.insert(vValue[i].second);
             nValueRet += vValue[i].first;
@@ -837,7 +837,7 @@ bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfThe
         bool fReachedTarget = false;
         for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
         {
-            for (int i = 0; i < vValue.size(); i++)
+            for (unsigned int i = 0; i < vValue.size(); i++)
             {
                 if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
                 {
@@ -866,7 +866,7 @@ bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfThe
         nValueRet += coinLowestLarger.first;
     }
     else {
-        for (int i = 0; i < vValue.size(); i++)
+        for (unsigned int i = 0; i < vValue.size(); i++)
             if (vfBest[i])
             {
                 setCoinsRet.insert(vValue[i].second);
@@ -875,7 +875,7 @@ bool CWallet::SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfThe
 
         //// debug print
         printf("SelectCoins() best subset: ");
-        for (int i = 0; i < vValue.size(); i++)
+        for (unsigned int i = 0; i < vValue.size(); i++)
             if (vfBest[i])
                 printf("%s ", FormatMoney(vValue[i].first).c_str());
         printf("total %s\n", FormatMoney(nBest).c_str());
diff --git a/src/wallet.h b/src/wallet.h
index bb9177b684..e0f39b4170 100644
--- a/src/wallet.h
+++ b/src/wallet.h
@@ -355,7 +355,7 @@ public:
     bool UpdateSpent(const std::vector<char>& vfNewSpent)
     {
         bool fReturn = false;
-        for (int i=0; i < vfNewSpent.size(); i++)
+        for (unsigned int i = 0; i < vfNewSpent.size(); i++)
         {
             if (i == vfSpent.size())
                 break;
@@ -434,7 +434,7 @@ public:
             return nAvailableCreditCached;
 
         int64 nCredit = 0;
-        for (int i = 0; i < vout.size(); i++)
+        for (unsigned int i = 0; i < vout.size(); i++)
         {
             if (!IsSpent(i))
             {
@@ -487,7 +487,7 @@ public:
         std::vector<const CMerkleTx*> vWorkQueue;
         vWorkQueue.reserve(vtxPrev.size()+1);
         vWorkQueue.push_back(this);
-        for (int i = 0; i < vWorkQueue.size(); i++)
+        for (unsigned int i = 0; i < vWorkQueue.size(); i++)
         {
             const CMerkleTx* ptx = vWorkQueue[i];