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Implemented load/save of chunk maps for current downloads.

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The side effect is that even when stopped, downloads show the correct downloaded size (up to the size of one chunk).



git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@1865 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
csoler 2009-12-10 22:55:27 +00:00
parent 4d190963cf
commit b6c048a5fd
8 changed files with 200 additions and 48 deletions
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55
libretroshare/src/ft/ftchunkmap.cc
View file

@ -67,6 +67,35 @@ ChunkMap::ChunkMap(uint64_t s)
#endif
}
ChunkMap::ChunkMap(uint64_t file_size,
const std::vector<uint32_t>& map,
uint32_t chunk_size,
uint32_t chunk_number,
FileChunksInfo::ChunkStrategy strategy)
:_file_size(file_size),_chunk_size(chunk_size),_strategy(strategy)
{
#ifdef DEBUG_FTCHUNK
std::cerr << "ChunkMap:: loading availability map of size " << map.size() << ", chunk_size=" << chunk_size << ", chunknumber = " << chunk_number << std::endl ;
#endif
_map.clear() ;
_map.resize(chunk_number) ;
_total_downloaded = 0 ;
for(uint32_t i=0;i<_map.size();++i)
{
uint32_t j = i & 31 ; // i%32
uint32_t k = i >> 5 ; // i/32
_map[i] = ( (map[k] & (1<<j)) > 0)?(FileChunksInfo::CHUNK_DONE) : (FileChunksInfo::CHUNK_OUTSTANDING) ;
if(_map[i] == FileChunksInfo::CHUNK_DONE)
_total_downloaded += _chunk_size ;
}
}
void ChunkMap::dataReceived(const ftChunk::ChunkId& cid)
{
// 1 - find which chunk contains the received data.
@ -247,5 +276,31 @@ void ChunkMap::getChunksInfo(FileChunksInfo& info) const
info.chunks = _map ;
}
void ChunkMap::buildAvailabilityMap(std::vector<uint32_t>& map,uint32_t& chunk_size,uint32_t& chunk_number,FileChunksInfo::ChunkStrategy& strategy) const
{
chunk_size = _chunk_size ;
chunk_number = _map.size() ;
strategy = _strategy ;
map.clear() ;
map.reserve((chunk_number >> 5)+1) ;
uint32_t r=0 ;
for(uint32_t i=0;i<_map.size();++i)
{
uint32_t j = i & 31 ;
r |= (_map[i]==FileChunksInfo::CHUNK_DONE)?(1<<j):0 ;
if(j==31 || i==_map.size()-1)
{
map.push_back(r);
r=0 ;
}
}
#ifdef DEBUG_FTCHUNK
std::cerr << "ChunkMap:: built availability map of size " << map.size() << ", chunk_size=" << chunk_size << ", chunknumber = " << chunk_number << ", strategy=" << _strategy << std::endl ;
#endif
}