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updated filter_file function

This commit is contained in:
spyhole 2005-07-05 01:34:10 +00:00
parent c42a8a50d3
commit 3fdf9b378f
1 changed files with 25 additions and 18 deletions
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43
src/torrent.cpp
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@ -632,8 +632,9 @@ namespace libtorrent
m_picker->filtered_pieces(bitmask); m_picker->filtered_pieces(bitmask);
} }
//idea from Arvid and MooPolice //suggest using this function on single file in a torrent file
//todo refactoring and improving the function body //suggest using this function after filter_files() function
//or change selective download policy casually during downloading progress
void torrent::filter_file(int index, bool filter) void torrent::filter_file(int index, bool filter)
{ {
// this call is only valid on torrents with metadata // this call is only valid on torrents with metadata
@ -641,26 +642,32 @@ namespace libtorrent
assert(index < m_torrent_file.num_files()); assert(index < m_torrent_file.num_files());
assert(index >= 0); assert(index >= 0);
entry::integer_type position = 0;
entry::integer_type start_position = 0; if (m_torrent_file.num_pieces())
int start_piece_index = 0; {
int end_piece_index = 0; int piece_length = m_torrent_file.piece_length();
entry::integer_type start = position;
// TODO: just skipping the first and last piece is not a good idea. for (int i = 0; i < index; ++i)
// they should only be skipped if there are files that are wanted {
// that span those pieces. Maybe this function should be removed. start = position;
for (int i = 0; i < index; ++i) position += m_torrent_file.file_at(i).size;
start_position += m_torrent_file.file_at(i).size; }
int start_piece = int(start / piece_length);
start_position = start_position + 1; int last_piece = int(position / piece_length);
start_piece_index = start_position / m_torrent_file.piece_length(); for (int filter_index = start_piece ; filter_index < last_piece ; ++filter_index)
end_piece_index = start_piece_index + m_torrent_file.file_at(index).size/(m_torrent_file.piece_length()); {
filter_piece(filter_index, filter);
for(int i = start_piece_index; i < end_piece_index; ++i) }
filter_piece(i, filter); }
} }
//suggest using this function on a torrent file.
//suggest using this function as a static globle selective download policy
//"before" downloading progress
void torrent::filter_files(std::vector<bool> const& bitmask) void torrent::filter_files(std::vector<bool> const& bitmask)
{ {
// this call is only valid on torrents with metadata // this call is only valid on torrents with metadata