From 6410cac43c36986d93e4cc75f5f469871d76074f Mon Sep 17 00:00:00 2001
From: spyhole <spyhole@a83610d8-ad2a-0410-a6ab-fc0612d85776>
Date: Sat, 2 Jul 2005 08:47:46 +0000
Subject: [PATCH] torrent.cpp

---
 src/torrent.cpp        | 23 +++++++++++++++++++++++
 src/torrent_handle.cpp | 11 ++++++++++-
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/src/torrent.cpp b/src/torrent.cpp
index 825932910..3c4f90251 100755
--- a/src/torrent.cpp
+++ b/src/torrent.cpp
@@ -632,6 +632,29 @@ namespace libtorrent
 		m_picker->filtered_pieces(bitmask);
 	}
 
+	//idea from Arvid and MooPolice
+	//todo refactoring and improving the function body
+	void torrent::filter_file(int index, bool filter)
+	{
+		__int64 start_position = 0;
+		int start_piece_index = 0;
+		int end_piece_index = 0;
+
+		for(int i=0;i<index;i++)
+		{
+			start_position += m_torrent_file.file_at(i).size;
+		}
+		start_position = start_position+1;
+
+		start_piece_index = start_position/(m_torrent_file.piece_length());
+		end_piece_index = start_piece_index + m_torrent_file.file_at(index).size/(m_torrent_file.piece_length());
+
+		for(int filter_piece_index= start_piece_index;filter_piece_index<end_piece_index;filter_piece_index++)
+		{
+			filter_piece(filter_piece_index, filter);
+		}
+	}
+
 	void torrent::replace_trackers(std::vector<announce_entry> const& urls)
 	{
 		assert(!urls.empty());
diff --git a/src/torrent_handle.cpp b/src/torrent_handle.cpp
index 4a814a909..5da1e4bf5 100755
--- a/src/torrent_handle.cpp
+++ b/src/torrent_handle.cpp
@@ -285,7 +285,16 @@ namespace libtorrent
 			, bind(&torrent::filtered_pieces, _1, boost::ref(ret)));
 		return ret;
 	}
-	
+
+	//idea from Arvid and MooPolice
+	//todo refactoring and improving the function body
+	void torrent_handle::filter_file(int index, bool filter)
+	{
+		INVARIANT_CHECK;
+		call_member<void>(m_ses, m_chk, m_info_hash
+			, bind(&torrent::filter_file, _1, index, filter));
+	}
+
 	std::vector<announce_entry> const& torrent_handle::trackers() const
 	{
 		INVARIANT_CHECK;