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corrected a bug in chunkmaps that affected file creators being providers at the same time, which could corrupt data. Added some debug info to chunk maps.

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git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@3673 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
csoler 2010-10-15 22:12:29 +00:00
parent eb21343685
commit 8369d42600
6 changed files with 114 additions and 12 deletions
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47
libretroshare/src/ft/ftchunkmap.cc
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@ -1,3 +1,32 @@
/*
* libretroshare/src/ft: ftdata.cc
*
* File Transfer for RetroShare.
*
* Copyright 2010 by Cyril Soler
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License Version 2 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
* Please report all bugs and problems to "csoler@users.sourceforge.net".
*
*/
/********
* #define DEBUG_FTCHUNK 1
*********/
#ifdef DEBUG_FTCHUNK
#include <assert.h>
#endif
@ -54,6 +83,10 @@ ChunkMap::ChunkMap(uint64_t s)
std::cerr << " Strategy: " << _strategy << std::endl ;
std::cerr << " ChunkSize: " << _chunk_size << std::endl ;
std::cerr << " Number of Chunks: " << n << std::endl ;
std::cerr << " Data: " ;
for(int i=0;i<_map.size();++i)
std::cerr << _map[i] ;
std::cerr << std::endl ;
#endif
}
@ -252,16 +285,24 @@ bool ChunkMap::isChunkAvailable(uint64_t offset, uint32_t chunk_size) const
uint32_t chunk_number_start = offset/(uint64_t)_chunk_size ;
uint32_t chunk_number_end = (offset+(uint64_t)chunk_size)/(uint64_t)_chunk_size ;
if((offset+(uint64_t)chunk_size) % (uint64_t)_chunk_size == 0)
--chunk_number_end ;
if((offset+(uint64_t)chunk_size) % (uint64_t)_chunk_size != 0)
++chunk_number_end ;
// It's possible that chunk_number_start==chunk_number_end+1, but for this we need to have
// chunk_size=0, and offset%_chunk_size=0, so the response "true" is still valid.
//
for(uint32_t i=chunk_number_start;i!=chunk_number_end;++i)
for(uint32_t i=chunk_number_start;i<chunk_number_end;++i)
if(_map[i] != FileChunksInfo::CHUNK_DONE)
{
#ifdef DEBUG_FTCHUNK
std::cerr << "ChunkMap::isChunkAvailable(): (" << offset << "," << chunk_size << ") is not available" << std::endl;
#endif
return false ;
}
#ifdef DEBUG_FTCHUNK
std::cerr << "ChunkMap::isChunkAvailable(): (" << offset << "," << chunk_size << ") is available" << std::endl;
#endif
return true ;
}