keep track of last "have" for each torrent

libtorrent/include/libtorrent/piece_picker.hpp

@@ -212,8 +212,8 @@ namespace libtorrent
 
 		// sets all pieces to dont-have
 		void init(int blocks_per_piece, int blocks_in_last_piece, int total_num_pieces);
-        void increase_num_pieces(int total_num_pieces);
+		void increase_num_pieces(int total_num_pieces);
-        int num_pieces() const { return int(m_piece_map.size()); }
+		int num_pieces() const { return int(m_piece_map.size()); }
 
 		bool have_piece(int index) const
 		{
@@ -357,6 +357,8 @@ namespace libtorrent
 
 		int num_have() const { return m_num_have; }
 
+		int last_have() const { return m_last_have; }
+
 		// the number of pieces we want and don't have
 		int num_want_left() const { return num_pieces() - m_num_have - m_num_filtered; }
 
@@ -611,6 +613,9 @@ namespace libtorrent
 		// the number of pieces we have
 		int m_num_have;
 
+		// the index of last have
+		int m_last_have;
+
 		// we have all pieces in the range [0, m_cursor)
 		// m_cursor is the first piece we don't have
 		int m_cursor;

libtorrent/include/libtorrent/torrent.hpp

@@ -529,6 +529,13 @@ namespace libtorrent
 				: m_torrent_file->num_pieces();
 		}
 
+		int last_have() const
+		{
+			return has_picker()
+				? m_picker->last_have()
+				: -1;
+		}
+
 		// when we get a have message, this is called for that piece
 		void peer_has(int index, peer_connection const* peer)
 		{

libtorrent/include/libtorrent/torrent_handle.hpp

@@ -558,6 +558,9 @@ namespace libtorrent
 		// std::accumulate(pieces->begin(), pieces->end());
 		int num_pieces;
 
+		// index of last piece we have
+		int last_have;
+
 		// the number of bytes of the file we have
 		// including pieces that may have been filtered
 		// after we downloaded them

libtorrent/src/piece_picker.cpp

@@ -71,6 +71,7 @@ namespace libtorrent
 		, m_num_filtered(0)
 		, m_num_have_filtered(0)
 		, m_num_have(0)
+		, m_last_have(-1)
 		, m_cursor(0)
 		, m_reverse_cursor(0)
 		, m_sparse_regions(1)
@@ -104,6 +105,7 @@ namespace libtorrent
 		m_num_filtered += m_num_have_filtered;
 		m_num_have_filtered = 0;
 		m_num_have = 0;
+		m_last_have = -1;
 		m_dirty = true;
 		for (std::vector<piece_pos>::iterator i = m_piece_map.begin()
 			, end(m_piece_map.end()); i != end; ++i)
@@ -1224,6 +1226,11 @@ namespace libtorrent
 		--m_num_have;
 		p.set_not_have();
 
+		if (index == m_last_have) {
+			while( !m_piece_map[m_last_have].have() && m_last_have >= 0 )
+				m_last_have--;
+		}
+
 		if (m_dirty) return;
 		if (p.priority(this) >= 0) add(index);
 	}
@@ -1288,6 +1295,8 @@ namespace libtorrent
 		}
 		++m_num_have;
 		p.set_have();
+		if (index > m_last_have)
+			m_last_have = index;
 		if (m_cursor == m_reverse_cursor - 1 &&
 			m_cursor == index)
 		{

libtorrent/src/torrent.cpp

@@ -8537,6 +8537,7 @@ namespace libtorrent
 			st->pieces.resize(num_pieces, true);
 		}
 		st->num_pieces = num_have();
+		st->last_have = last_have();
 		st->num_seeds = num_seeds();
 		if ((flags & torrent_handle::query_distributed_copies) && m_picker.get())
 		{

libtorrent/src/torrent_handle.cpp

@@ -104,6 +104,7 @@ namespace libtorrent
 		, list_peers(0)
 		, connect_candidates(0)
 		, num_pieces(0)
+		, last_have(-1)
 		, total_done(0)
 		, total_wanted_done(0)
 		, total_wanted(0)

src/twister.cpp

@@ -147,10 +147,20 @@ torrent_handle startTorrentUser(std::string const &username)
 
         m_userTorrent[username] = ses->add_torrent(tparams);
         m_userTorrent[username].force_dht_announce();
+        torrent_status status = m_userTorrent[username].status();
     }
     return m_userTorrent[username];
 }
 
+int lastPostKfromTorrent(std::string const &username)
+{
+    if( !m_userTorrent.count(username) )
+        return -1;
+
+    torrent_status status = m_userTorrent[username].status();
+    return status.last_have;
+}
+
 void ThreadWaitExtIP()
 {
     RenameThread("wait-extip");