void
tr_cpConstruct( tr_completion * cp, tr_torrent * tor )
{
cp->tor = tor;
tr_bitfieldConstruct( &cp->blockBitfield, tor->blockCount );
tr_cpReset( cp );
}
tr_completion *
tr_cpConstruct( tr_completion * cp, tr_torrent * tor )
{
cp->tor = tor;
cp->completeBlocks = tr_new( uint16_t, tor->info.pieceCount );
tr_bitfieldConstruct( &cp->blockBitfield, tor->blockCount );
tr_bitfieldConstruct( &cp->pieceBitfield, tor->info.pieceCount );
tr_cpReset( cp );
return cp;
}
tr_completion *
tr_cpInit( tr_torrent * tor )
{
tr_completion * cp = tr_new( tr_completion, 1 );
cp->tor = tor;
cp->blockBitfield = tr_bitfieldNew( tor->blockCount );
cp->pieceBitfield = tr_bitfieldNew( tor->info.pieceCount );
cp->completeBlocks = tr_new( uint16_t, tor->info.pieceCount );
tr_cpReset( cp );
return cp;
}
tr_completion_t * tr_cpInit( tr_torrent_t * tor )
{
tr_completion_t * cp;
cp = malloc( sizeof( tr_completion_t ) );
cp->tor = tor;
cp->blockBitfield = malloc( ( tor->blockCount + 7 ) / 8 );
cp->blockDownloaders = malloc( tor->blockCount );
cp->pieceBitfield = malloc( ( tor->info.pieceCount + 7 ) / 8 );
cp->missingBlocks = malloc( tor->info.pieceCount * sizeof( int ) );
tr_cpReset( cp );
return cp;
}
void
tr_cpBlockInit( tr_completion * cp, const tr_bitfield * b )
{
tr_cpReset( cp );
/* set blockBitfield */
tr_bitfieldSetFromBitfield( &cp->blockBitfield, b );
/* set sizeNow */
cp->sizeNow = tr_bitfieldCountTrueBits( &cp->blockBitfield );
assert( cp->sizeNow <= cp->tor->blockCount );
cp->sizeNow *= cp->tor->blockSize;
if( tr_bitfieldHas( b, cp->tor->blockCount-1 ) )
cp->sizeNow -= ( cp->tor->blockSize - cp->tor->lastBlockSize );
assert( cp->sizeNow <= cp->tor->info.totalSize );
}
void
tr_cpSetHaveAll( tr_completion * cp )
{
tr_piece_index_t i;
tr_torrent * tor = cp->tor;
tr_cpReset( cp );
cp->sizeNow = tor->info.totalSize;
tr_bitfieldAddRange( &cp->blockBitfield, 0, tor->blockCount );
tr_bitfieldAddRange( &cp->pieceBitfield, 0, tor->info.pieceCount );
for( i=0; i<tor->info.pieceCount; ++i )
cp->completeBlocks[i] = tr_torPieceCountBlocks( tor, i );
cp->sizeWhenDoneIsDirty = 1;
cp->haveValidIsDirty = 1;
}
int
tr_cpBlockBitfieldSet( tr_completion * cp,
tr_bitfield * bitfield )
{
int success = FALSE;
assert( cp );
assert( bitfield );
assert( cp->blockBitfield );
if( tr_bitfieldTestFast( bitfield, cp->tor->blockCount - 1 ) )
{
tr_block_index_t i;
tr_cpReset( cp );
for( i = 0; i < cp->tor->blockCount; ++i )
if( tr_bitfieldHasFast( bitfield, i ) )
tr_cpBlockAdd( cp, i );
success = TRUE;
}
return success;
}
/* Initialize a completion object from a bitfield indicating which blocks we have */
tr_bool
tr_cpBlockBitfieldSet( tr_completion * cp, tr_bitfield * blockBitfield )
{
tr_bool success = FALSE;
assert( cp );
assert( blockBitfield );
/* The bitfield of block flags is typically loaded from a resume file.
Test the bitfield's length in case the resume file somehow got corrupted */
if(( success = blockBitfield->byteCount == cp->blockBitfield.byteCount ))
{
tr_block_index_t b = 0;
tr_piece_index_t p = 0;
uint32_t pieceBlock = 0;
uint16_t completeBlocksInPiece = 0;
tr_block_index_t completeBlocksInTorrent = 0;
uint32_t blocksInCurrentPiece = tr_torPieceCountBlocks( cp->tor, p );
/* start cp with a state where it thinks we have nothing */
tr_cpReset( cp );
/* init our block bitfield from the one passed in */
memcpy( cp->blockBitfield.bits, blockBitfield->bits, blockBitfield->byteCount );
/* invalidate the fields that are lazy-evaluated */
cp->sizeWhenDoneIsDirty = TRUE;
cp->haveValidIsDirty = TRUE;
/* to set the remaining fields, we walk through every block... */
while( b < cp->tor->blockCount )
{
if( tr_bitfieldHasFast( blockBitfield, b ) )
++completeBlocksInPiece;
++b;
++pieceBlock;
/* by the time we reach the end of a piece, we have enough info
to update that piece's slot in cp.completeBlocks and cp.pieceBitfield */
if( pieceBlock == blocksInCurrentPiece )
{
cp->completeBlocks[p] = completeBlocksInPiece;
completeBlocksInTorrent += completeBlocksInPiece;
if( completeBlocksInPiece == blocksInCurrentPiece )
tr_bitfieldAdd( &cp->pieceBitfield, p );
/* reset the per-piece counters because we're starting on a new piece now */
++p;
completeBlocksInPiece = 0;
pieceBlock = 0;
blocksInCurrentPiece = tr_torPieceCountBlocks( cp->tor, p );
}
}
/* update sizeNow */
cp->sizeNow = completeBlocksInTorrent;
cp->sizeNow *= tr_torBlockCountBytes( cp->tor, 0 );
if( tr_bitfieldHasFast( &cp->blockBitfield, cp->tor->blockCount-1 ) ) {
/* the last block is usually smaller than the other blocks,
so handle that special case or cp->sizeNow might be too large */
cp->sizeNow -= tr_torBlockCountBytes( cp->tor, 0 );
cp->sizeNow += tr_torBlockCountBytes( cp->tor, cp->tor->blockCount-1 );
}
}
return success;
}
