Some extra LedgerAcquire helper functions.

src/LedgerAcquire.cpp

@@ -326,6 +326,29 @@ void PeerSet::sendRequest(const ripple::TMGetLedger& tmGL)
 	}
 }
 
+int  PeerSet::takePeerSetFrom(const PeerSet& s)
+{
+	int ret = 0;
+	mPeers.clear();
+	mPeers.reserve(s.mPeers.size());
+	BOOST_FOREACH(const boost::weak_ptr<Peer>& p, s.mPeers)
+		if (p.lock())
+		{
+			mPeers.push_back(p);
+			++ret;
+		}
+	return ret;
+}
+
+int PeerSet::getPeerCount() const
+{
+	int ret = 0;
+	BOOST_FOREACH(const boost::weak_ptr<Peer>& p, mPeers)
+		if (p.lock())
+			++ret;
+	return ret;
+}
+
 bool LedgerAcquire::takeBase(const std::string& data)
 { // Return value: true=normal, false=bad data
 #ifdef LA_DEBUG

src/LedgerAcquire.h

@@ -45,6 +45,9 @@ public:
 	void badPeer(Peer::ref);
 	void resetTimer();
 
+	int takePeerSetFrom(const PeerSet& s);
+	int getPeerCount() const;
+
 protected:
 	virtual void newPeer(Peer::ref) = 0;
 	virtual void onTimer(void) = 0;