324 lines
8.9 KiB
C
324 lines
8.9 KiB
C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2005-2008 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 <assert.h>
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#include <string.h>
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#include "transmission.h"
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#include "completion.h"
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#include "torrent.h"
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#include "utils.h"
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struct tr_completion
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{
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unsigned int sizeWhenDoneIsDirty : 1;
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tr_torrent * tor;
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/* do we have this block? */
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tr_bitfield * blockBitfield;
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/* do we have this piece? */
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tr_bitfield * pieceBitfield;
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/* a block is complete if and only if we have it */
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uint16_t * completeBlocks;
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/* number of bytes we'll have when done downloading. [0..info.totalSize]
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DON'T access this directly; it's a lazy field.
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use tr_cpSizeWhenDone() instead! */
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uint64_t sizeWhenDoneLazy;
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/* number of bytes we want or have now. [0..sizeWhenDone] */
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uint64_t sizeNow;
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};
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static void
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tr_cpReset( tr_completion * cp )
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{
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tr_bitfieldClear( cp->pieceBitfield );
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tr_bitfieldClear( cp->blockBitfield );
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memset( cp->completeBlocks, 0, sizeof(uint16_t) * cp->tor->info.pieceCount );
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cp->sizeNow = 0;
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cp->sizeWhenDoneIsDirty = 1;
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}
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tr_completion *
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tr_cpInit( tr_torrent * tor )
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{
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tr_completion * cp = tr_new( tr_completion, 1 );
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cp->tor = tor;
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cp->blockBitfield = tr_bitfieldNew( tor->blockCount );
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cp->pieceBitfield = tr_bitfieldNew( tor->info.pieceCount );
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cp->completeBlocks = tr_new( uint16_t, tor->info.pieceCount );
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tr_cpReset( cp );
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return cp;
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}
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void
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tr_cpClose( tr_completion * cp )
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{
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tr_free ( cp->completeBlocks );
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tr_bitfieldFree( cp->pieceBitfield );
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tr_bitfieldFree( cp->blockBitfield );
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tr_free ( cp );
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}
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void
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tr_cpInvalidateDND ( tr_completion * cp )
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{
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cp->sizeWhenDoneIsDirty = 1;
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}
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uint64_t
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tr_cpSizeWhenDone( const tr_completion * ccp )
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{
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if( ccp->sizeWhenDoneIsDirty )
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{
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tr_completion * cp = (tr_completion *) ccp; /* mutable */
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const tr_torrent * tor = cp->tor;
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const tr_info * info = &tor->info;
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tr_piece_index_t i;
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uint64_t size = 0;
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for( i=0; i<info->pieceCount; ++i )
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{
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if( !info->pieces[i].dnd ) {
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/* we want the piece... */
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size += tr_torPieceCountBytes( tor, i );
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} else if( tr_cpPieceIsComplete( cp, i ) ) {
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/* we have the piece... */
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size += tr_torPieceCountBytes( tor, i );
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} else if( cp->completeBlocks[i] ) {
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/* we have part of the piece... */
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const tr_block_index_t b = tr_torPieceFirstBlock( tor, i );
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const tr_block_index_t e = b + tr_torPieceCountBlocks( tor, i );
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tr_block_index_t j;
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for( j=b; j<e; ++j )
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if( tr_cpBlockIsComplete( cp, j ) )
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size += tr_torBlockCountBytes( tor, j );
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}
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}
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cp->sizeWhenDoneLazy = size;
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cp->sizeWhenDoneIsDirty = 0;
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}
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assert( ccp->sizeWhenDoneLazy <= ccp->tor->info.totalSize );
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assert( ccp->sizeWhenDoneLazy >= ccp->sizeNow );
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return ccp->sizeWhenDoneLazy;
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}
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int
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tr_cpPieceIsComplete( const tr_completion * cp,
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tr_piece_index_t piece )
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{
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return cp->completeBlocks[piece] == tr_torPieceCountBlocks(cp->tor,piece);
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}
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const tr_bitfield *
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tr_cpPieceBitfield( const tr_completion * cp )
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{
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return cp->pieceBitfield;
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}
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void
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tr_cpPieceAdd( tr_completion * cp, tr_piece_index_t piece )
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{
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const tr_torrent * tor = cp->tor;
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const tr_block_index_t start = tr_torPieceFirstBlock(tor,piece);
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const tr_block_index_t end = start + tr_torPieceCountBlocks(tor, piece);
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tr_block_index_t i;
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for( i=start; i<end; ++i )
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tr_cpBlockAdd( cp, i );
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}
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void
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tr_cpPieceRem( tr_completion * cp, tr_piece_index_t piece )
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{
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const tr_torrent * tor = cp->tor;
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const tr_block_index_t start = tr_torPieceFirstBlock( tor, piece );
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const tr_block_index_t end = start + tr_torPieceCountBlocks( tor, piece );
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tr_block_index_t block;
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assert( cp );
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assert( piece < tor->info.pieceCount );
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assert( start < tor->blockCount );
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assert( start <= end );
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assert( end <= tor->blockCount );
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for( block=start; block<end; ++block )
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if( tr_cpBlockIsComplete( cp, block ) )
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cp->sizeNow -= tr_torBlockCountBytes( tor, block );
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cp->sizeWhenDoneIsDirty = 1;
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cp->completeBlocks[piece] = 0;
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tr_bitfieldRemRange ( cp->blockBitfield, start, end );
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tr_bitfieldRem( cp->pieceBitfield, piece );
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}
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int
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tr_cpBlockIsComplete( const tr_completion * cp, tr_block_index_t block )
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{
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return tr_bitfieldHas( cp->blockBitfield, block );
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}
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void
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tr_cpBlockAdd( tr_completion * cp, tr_block_index_t block )
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{
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const tr_torrent * tor = cp->tor;
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if( !tr_cpBlockIsComplete( cp, block ) )
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{
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const tr_piece_index_t piece = tr_torBlockPiece( tor, block );
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const int blockSize = tr_torBlockCountBytes( tor, block );
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++cp->completeBlocks[piece];
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if( cp->completeBlocks[piece] == tr_torPieceCountBlocks( tor, piece ) )
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tr_bitfieldAdd( cp->pieceBitfield, piece );
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tr_bitfieldAdd( cp->blockBitfield, block );
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cp->sizeNow += blockSize;
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cp->sizeWhenDoneIsDirty = 1;
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}
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}
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const tr_bitfield *
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tr_cpBlockBitfield( const tr_completion * cp )
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{
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assert( cp );
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assert( cp->blockBitfield );
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assert( cp->blockBitfield->bits );
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assert( cp->blockBitfield->bitCount );
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return cp->blockBitfield;
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}
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tr_errno
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tr_cpBlockBitfieldSet( tr_completion * cp, tr_bitfield * bitfield )
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{
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tr_block_index_t i;
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assert( cp );
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assert( bitfield );
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assert( cp->blockBitfield );
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if( !tr_bitfieldTestFast( bitfield, cp->tor->blockCount-1 ) )
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return TR_ERROR_ASSERT;
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tr_cpReset( cp );
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for( i=0; i<cp->tor->blockCount; ++i )
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if( tr_bitfieldHasFast( bitfield, i ) )
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tr_cpBlockAdd( cp, i );
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return 0;
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}
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int
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tr_cpMissingBlocksInPiece( const tr_completion * cp, tr_piece_index_t piece )
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{
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return tr_torPieceCountBlocks( cp->tor, piece ) - cp->completeBlocks[piece];
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}
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/***
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****
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***/
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float
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tr_cpPercentDone( const tr_completion * cp )
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{
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return tr_getRatio( cp->sizeNow, tr_cpSizeWhenDone(cp) );
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}
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float
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tr_cpPercentComplete ( const tr_completion * cp )
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{
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return tr_getRatio( cp->sizeNow, cp->tor->info.totalSize );
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}
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uint64_t
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tr_cpLeftUntilDone ( const tr_completion * cp )
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{
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return tr_cpSizeWhenDone(cp) - cp->sizeNow;
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}
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uint64_t
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tr_cpLeftUntilComplete ( const tr_completion * cp )
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{
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return cp->tor->info.totalSize - cp->sizeNow;
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}
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cp_status_t
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tr_cpGetStatus ( const tr_completion * cp )
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{
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if( cp->sizeNow == cp->tor->info.totalSize ) return TR_CP_COMPLETE;
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if( cp->sizeNow == tr_cpSizeWhenDone(cp) ) return TR_CP_DONE;
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return TR_CP_INCOMPLETE;
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}
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uint64_t
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tr_cpHaveValid( const tr_completion * cp )
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{
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uint64_t b = 0;
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tr_piece_index_t i;
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const tr_torrent * tor = cp->tor;
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for( i=0; i<tor->info.pieceCount; ++i )
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if( tr_cpPieceIsComplete( cp, i ) )
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b += tr_torPieceCountBytes( tor, i );
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return b;
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}
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uint64_t
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tr_cpHaveTotal( const tr_completion * cp )
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{
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return cp->sizeNow;
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}
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void
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tr_cpGetAmountDone( const tr_completion * cp, float * tab, int tabCount )
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{
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int i;
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const tr_torrent * tor = cp->tor;
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const float interval = tor->info.pieceCount / (float)tabCount;
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const int isComplete = tr_cpGetStatus ( tor->completion ) == TR_CP_COMPLETE;
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for( i=0; i<tabCount; ++i )
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{
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const tr_piece_index_t piece = i * interval;
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if( tor == NULL )
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tab[i] = 0.0f;
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else if( isComplete || tr_cpPieceIsComplete( cp, piece ) )
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tab[i] = 1.0f;
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else
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tab[i] = (float)cp->completeBlocks[piece] / tr_torPieceCountBlocks( tor, piece );
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}
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}
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