327 lines
8.4 KiB
C
327 lines
8.4 KiB
C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2005 Transmission authors and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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#include "transmission.h"
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tr_completion_t * tr_cpInit( tr_torrent_t * tor )
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{
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tr_completion_t * cp;
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cp = malloc( sizeof( tr_completion_t ) );
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cp->tor = tor;
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cp->blockBitfield = malloc( ( tor->blockCount + 7 ) / 8 );
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cp->blockDownloaders = malloc( tor->blockCount );
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cp->pieceBitfield = malloc( ( tor->info.pieceCount + 7 ) / 8 );
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cp->missingBlocks = malloc( tor->info.pieceCount * sizeof( int ) );
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tr_cpReset( cp );
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return cp;
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}
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void tr_cpClose( tr_completion_t * cp )
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{
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free( cp->blockBitfield );
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free( cp->blockDownloaders );
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free( cp->pieceBitfield );
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free( cp->missingBlocks );
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free( cp );
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}
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void tr_cpReset( tr_completion_t * cp )
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{
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tr_torrent_t * tor = cp->tor;
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int i;
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cp->blockCount = 0;
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memset( cp->blockBitfield, 0, ( tor->blockCount + 7 ) / 8 );
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memset( cp->blockDownloaders, 0, tor->blockCount );
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memset( cp->pieceBitfield, 0, ( tor->info.pieceCount + 7 ) / 8 );
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for( i = 0; i < tor->info.pieceCount; i++ )
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{
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cp->missingBlocks[i] = tr_pieceCountBlocks( i );
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}
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}
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float tr_cpCompletionAsFloat( tr_completion_t * cp )
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{
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return (float) cp->blockCount / (float) cp->tor->blockCount;
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}
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uint64_t tr_cpLeftBytes( tr_completion_t * cp )
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{
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tr_torrent_t * tor = cp->tor;
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uint64_t left;
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left = (uint64_t) ( cp->tor->blockCount - cp->blockCount ) *
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(uint64_t) tor->blockSize;
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if( !tr_bitfieldHas( cp->blockBitfield, cp->tor->blockCount - 1 ) &&
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tor->info.totalSize % tor->blockSize )
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{
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left += tor->info.totalSize % tor->blockSize;
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left -= tor->blockSize;
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}
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return left;
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}
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/* Pieces */
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int tr_cpPieceHasAllBlocks( tr_completion_t * cp, int piece )
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{
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tr_torrent_t * tor = cp->tor;
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int startBlock = tr_pieceStartBlock( piece );
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int endBlock = startBlock + tr_pieceCountBlocks( piece );
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int i;
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for( i = startBlock; i < endBlock; i++ )
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{
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if( !tr_bitfieldHas( cp->blockBitfield, i ) )
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{
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return 0;
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}
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}
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return 1;
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}
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int tr_cpPieceIsComplete( tr_completion_t * cp, int piece )
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{
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return tr_bitfieldHas( cp->pieceBitfield, piece );
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}
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uint8_t * tr_cpPieceBitfield( tr_completion_t * cp )
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{
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return cp->pieceBitfield;
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}
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void tr_cpPieceAdd( tr_completion_t * cp, int piece )
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{
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tr_torrent_t * tor = cp->tor;
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int startBlock, endBlock, i;
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startBlock = tr_pieceStartBlock( piece );
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endBlock = startBlock + tr_pieceCountBlocks( piece );
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for( i = startBlock; i < endBlock; i++ )
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{
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tr_cpBlockAdd( cp, i );
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}
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tr_bitfieldAdd( cp->pieceBitfield, piece );
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}
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void tr_cpPieceRem( tr_completion_t * cp, int piece )
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{
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tr_torrent_t * tor = cp->tor;
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int startBlock, endBlock, i;
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startBlock = tr_pieceStartBlock( piece );
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endBlock = startBlock + tr_pieceCountBlocks( piece );
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for( i = startBlock; i < endBlock; i++ )
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{
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tr_cpBlockRem( cp, i );
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}
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tr_bitfieldRem( cp->pieceBitfield, piece );
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}
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/* Blocks */
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void tr_cpDownloaderAdd( tr_completion_t * cp, int block )
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{
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tr_torrent_t * tor = cp->tor;
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if( !cp->blockDownloaders[block] && !tr_cpBlockIsComplete( cp, block ) )
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{
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cp->missingBlocks[tr_blockPiece(block)]--;
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}
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(cp->blockDownloaders[block])++;
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}
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void tr_cpDownloaderRem( tr_completion_t * cp, int block )
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{
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tr_torrent_t * tor = cp->tor;
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(cp->blockDownloaders[block])--;
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if( !cp->blockDownloaders[block] && !tr_cpBlockIsComplete( cp, block ) )
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{
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cp->missingBlocks[tr_blockPiece(block)]++;
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}
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}
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int tr_cpBlockIsComplete( tr_completion_t * cp, int block )
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{
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return tr_bitfieldHas( cp->blockBitfield, block );
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}
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void tr_cpBlockAdd( tr_completion_t * cp, int block )
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{
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tr_torrent_t * tor = cp->tor;
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if( !tr_cpBlockIsComplete( cp, block ) )
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{
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(cp->blockCount)++;
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if( !cp->blockDownloaders[block] )
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{
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(cp->missingBlocks[tr_blockPiece(block)])--;
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}
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}
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tr_bitfieldAdd( cp->blockBitfield, block );
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}
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void tr_cpBlockRem( tr_completion_t * cp, int block )
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{
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tr_torrent_t * tor = cp->tor;
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if( tr_cpBlockIsComplete( cp, block ) )
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{
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(cp->blockCount)--;
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if( !cp->blockDownloaders[block] )
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{
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(cp->missingBlocks[tr_blockPiece(block)])++;
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}
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}
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tr_bitfieldRem( cp->blockBitfield, block );
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}
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uint8_t * tr_cpBlockBitfield( tr_completion_t * cp )
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{
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return cp->blockBitfield;
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}
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void tr_cpBlockBitfieldSet( tr_completion_t * cp, uint8_t * bitfield )
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{
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tr_torrent_t * tor = cp->tor;
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int i, j;
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int startBlock, endBlock;
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int pieceComplete;
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for( i = 0; i < cp->tor->info.pieceCount; i++ )
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{
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startBlock = tr_pieceStartBlock( i );
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endBlock = startBlock + tr_pieceCountBlocks( i );
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pieceComplete = 1;
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for( j = startBlock; j < endBlock; j++ )
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{
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if( tr_bitfieldHas( bitfield, j ) )
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{
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tr_cpBlockAdd( cp, j );
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}
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else
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{
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pieceComplete = 0;
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}
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}
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if( pieceComplete )
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{
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tr_cpPieceAdd( cp, i );
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}
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}
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}
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float tr_cpPercentBlocksInPiece( tr_completion_t * cp, int piece )
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{
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tr_torrent_t * tor = cp->tor;
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int i;
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int blockCount, startBlock, endBlock;
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int complete;
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uint8_t * bitfield;
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blockCount = tr_pieceCountBlocks( piece );
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startBlock = tr_pieceStartBlock( piece );
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endBlock = startBlock + blockCount;
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complete = 0;
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bitfield = cp->blockBitfield;
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for( i = startBlock; i < endBlock; i++ )
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{
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if( tr_bitfieldHas( bitfield, i ) )
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{
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complete++;
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}
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}
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return (float)complete / (float)blockCount;
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}
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int tr_cpMissingBlockInPiece( tr_completion_t * cp, int piece )
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{
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tr_torrent_t * tor = cp->tor;
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int start, count, end, i;
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start = tr_pieceStartBlock( piece );
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count = tr_pieceCountBlocks( piece );
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end = start + count;
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for( i = start; i < end; i++ )
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{
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if( tr_cpBlockIsComplete( cp, i ) || cp->blockDownloaders[i] )
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{
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continue;
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}
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return i;
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}
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return -1;
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}
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int tr_cpMostMissingBlockInPiece( tr_completion_t * cp, int piece,
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int * downloaders )
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{
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tr_torrent_t * tor = cp->tor;
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int start, count, end, i;
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int * pool, poolSize, min, ret;
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start = tr_pieceStartBlock( piece );
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count = tr_pieceCountBlocks( piece );
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end = start + count;
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pool = malloc( count * sizeof( int ) );
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poolSize = 0;
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min = 255;
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for( i = start; i < end; i++ )
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{
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if( tr_cpBlockIsComplete( cp, i ) || cp->blockDownloaders[i] > min )
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{
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continue;
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}
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if( cp->blockDownloaders[i] < min )
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{
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min = cp->blockDownloaders[i];
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poolSize = 0;
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}
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if( cp->blockDownloaders[i] <= min )
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{
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pool[poolSize++] = i;
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}
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}
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if( poolSize > 0 )
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{
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ret = pool[0];
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*downloaders = min;
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}
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else
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{
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ret = -1;
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}
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free( pool );
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return ret;
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}
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