Split AcceptBlockHeader from AcceptBlock.

Also modify some connection logic to deal with non-full blocks in the index.

src/main.h

@@ -608,7 +608,8 @@ bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW = t
 
 // Store block on disk
 // if dbp is provided, the file is known to already reside on disk
-bool AcceptBlock(CBlock& block, CValidationState& state, CDiskBlockPos* dbp = NULL);
+bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex **pindex, CDiskBlockPos* dbp = NULL);
+bool AcceptBlockHeader(CBlockHeader& block, CValidationState& state, CBlockIndex **ppindex= NULL);
 
 
 
@@ -866,6 +867,29 @@ public:
     {
         LogPrintf("%s\n", ToString().c_str());
     }
+
+    // Check whether this block index entry is valid up to the passed validity level.
+    bool IsValid(enum BlockStatus nUpTo = BLOCK_VALID_TRANSACTIONS) const
+    {
+        assert(!(nUpTo & ~BLOCK_VALID_MASK)); // Only validity flags allowed.
+        if (nStatus & BLOCK_FAILED_MASK)
+            return false;
+        return ((nStatus & BLOCK_VALID_MASK) >= nUpTo);
+    }
+
+    // Raise the validity level of this block index entry.
+    // Returns true if the validity was changed.
+    bool RaiseValidity(enum BlockStatus nUpTo)
+    {
+        assert(!(nUpTo & ~BLOCK_VALID_MASK)); // Only validity flags allowed.
+        if (nStatus & BLOCK_FAILED_MASK)
+            return false;
+        if ((nStatus & BLOCK_VALID_MASK) < nUpTo) {
+            nStatus = (nStatus & ~BLOCK_VALID_MASK) | nUpTo;
+            return true;
+        }
+        return false;
+    }
 };