transmission/libtransmission/completion.c

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/******************************************************************************
* $Id$
*
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* Copyright (c) 2005-2008 Transmission authors and contributors
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*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
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#include <assert.h>
#include <string.h>
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#include "transmission.h"
#include "completion.h"
#include "torrent.h"
#include "utils.h"
struct tr_completion
{
unsigned int sizeWhenDoneIsDirty : 1;
tr_torrent * tor;
/* do we have this block? */
tr_bitfield * blockBitfield;
/* do we have this piece? */
tr_bitfield * pieceBitfield;
/* a block is complete if and only if we have it */
uint16_t * completeBlocks;
/* number of bytes we'll have when done downloading. [0..info.totalSize]
DON'T access this directly; it's a lazy field.
use tr_cpSizeWhenDone() instead! */
uint64_t sizeWhenDoneLazy;
/* number of bytes we want or have now. [0..sizeWhenDone] */
uint64_t sizeNow;
};
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static void
tr_cpReset( tr_completion * cp )
{
tr_bitfieldClear( cp->pieceBitfield );
tr_bitfieldClear( cp->blockBitfield );
memset( cp->completeBlocks, 0, sizeof(uint16_t) * cp->tor->info.pieceCount );
cp->sizeNow = 0;
cp->sizeWhenDoneIsDirty = 1;
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}
tr_completion *
tr_cpInit( tr_torrent * tor )
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{
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 );
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tr_cpReset( cp );
return cp;
}
void
tr_cpClose( tr_completion * cp )
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{
tr_free ( cp->completeBlocks );
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tr_bitfieldFree( cp->pieceBitfield );
tr_bitfieldFree( cp->blockBitfield );
tr_free ( cp );
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}
void
tr_cpInvalidateDND ( tr_completion * cp )
{
cp->sizeWhenDoneIsDirty = 1;
}
uint64_t
tr_cpSizeWhenDone( const tr_completion * ccp )
{
if( ccp->sizeWhenDoneIsDirty )
{
tr_completion * cp = (tr_completion *) ccp; /* mutable */
const tr_torrent * tor = cp->tor;
const tr_info * info = &tor->info;
tr_piece_index_t i;
uint64_t size = 0;
for( i=0; i<info->pieceCount; ++i )
{
if( !info->pieces[i].dnd ) {
/* we want the piece... */
size += tr_torPieceCountBytes( tor, i );
} else if( tr_cpPieceIsComplete( cp, i ) ) {
/* we have the piece... */
size += tr_torPieceCountBytes( tor, i );
} else if( cp->completeBlocks[i] ) {
/* we have part of the piece... */
const tr_block_index_t b = tr_torPieceFirstBlock( tor, i );
const tr_block_index_t e = b + tr_torPieceCountBlocks( tor, i );
tr_block_index_t j;
for( j=b; j<e; ++j )
if( tr_cpBlockIsComplete( cp, j ) )
size += tr_torBlockCountBytes( tor, j );
}
}
cp->sizeWhenDoneLazy = size;
cp->sizeWhenDoneIsDirty = 0;
}
assert( ccp->sizeWhenDoneLazy <= ccp->tor->info.totalSize );
assert( ccp->sizeWhenDoneLazy >= ccp->sizeNow );
return ccp->sizeWhenDoneLazy;
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}
int
tr_cpPieceIsComplete( const tr_completion * cp,
tr_piece_index_t piece )
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{
return cp->completeBlocks[piece] == tr_torPieceCountBlocks(cp->tor,piece);
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}
const tr_bitfield *
tr_cpPieceBitfield( const tr_completion * cp )
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{
return cp->pieceBitfield;
}
void
tr_cpPieceAdd( tr_completion * cp, tr_piece_index_t piece )
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{
const tr_torrent * tor = cp->tor;
const tr_block_index_t start = tr_torPieceFirstBlock(tor,piece);
const tr_block_index_t end = start + tr_torPieceCountBlocks(tor, piece);
tr_block_index_t i;
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for( i=start; i<end; ++i )
tr_cpBlockAdd( cp, i );
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}
void
tr_cpPieceRem( tr_completion * cp, tr_piece_index_t piece )
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{
const tr_torrent * tor = cp->tor;
const tr_block_index_t start = tr_torPieceFirstBlock( tor, piece );
const tr_block_index_t end = start + tr_torPieceCountBlocks( tor, piece );
tr_block_index_t block;
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assert( cp != NULL );
assert( piece < tor->info.pieceCount );
assert( start < tor->blockCount );
assert( start <= end );
assert( end <= tor->blockCount );
for( block=start; block<end; ++block )
if( tr_cpBlockIsComplete( cp, block ) )
cp->sizeNow -= tr_torBlockCountBytes( tor, block );
cp->sizeWhenDoneIsDirty = 1;
cp->completeBlocks[piece] = 0;
tr_bitfieldRemRange ( cp->blockBitfield, start, end );
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tr_bitfieldRem( cp->pieceBitfield, piece );
}
int
tr_cpBlockIsComplete( const tr_completion * cp, tr_block_index_t block )
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{
return tr_bitfieldHas( cp->blockBitfield, block );
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}
void
tr_cpBlockAdd( tr_completion * cp, tr_block_index_t block )
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{
const tr_torrent * tor = cp->tor;
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if( !tr_cpBlockIsComplete( cp, block ) )
{
const tr_piece_index_t piece = tr_torBlockPiece( tor, block );
const int blockSize = tr_torBlockCountBytes( tor, block );
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++cp->completeBlocks[piece];
if( cp->completeBlocks[piece] == tr_torPieceCountBlocks( tor, piece ) )
tr_bitfieldAdd( cp->pieceBitfield, piece );
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tr_bitfieldAdd( cp->blockBitfield, block );
cp->sizeNow += blockSize;
cp->sizeWhenDoneIsDirty = 1;
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}
}
const tr_bitfield *
tr_cpBlockBitfield( const tr_completion * cp )
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{
assert( cp );
assert( cp->blockBitfield );
assert( cp->blockBitfield->bits );
assert( cp->blockBitfield->bitCount );
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return cp->blockBitfield;
}
tr_errno
tr_cpBlockBitfieldSet( tr_completion * cp, tr_bitfield * bitfield )
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{
tr_block_index_t i;
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assert( cp );
assert( bitfield );
assert( cp->blockBitfield );
if( !tr_bitfieldTestFast( bitfield, cp->tor->blockCount-1 ) )
return TR_ERROR_ASSERT;
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tr_cpReset( cp );
for( i=0; i<cp->tor->blockCount; ++i )
if( tr_bitfieldHasFast( bitfield, i ) )
tr_cpBlockAdd( cp, i );
return 0;
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}
int
tr_cpMissingBlocksInPiece( const tr_completion * cp, tr_piece_index_t piece )
{
return tr_torPieceCountBlocks( cp->tor, piece ) - cp->completeBlocks[piece];
}
/***
****
***/
float
tr_cpPercentDone( const tr_completion * cp )
{
return tr_getRatio( cp->sizeNow, tr_cpSizeWhenDone(cp) );
}
float
tr_cpPercentComplete ( const tr_completion * cp )
{
return tr_getRatio( cp->sizeNow, cp->tor->info.totalSize );
}
uint64_t
tr_cpLeftUntilDone ( const tr_completion * cp )
{
return tr_cpSizeWhenDone(cp) - cp->sizeNow;
}
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uint64_t
tr_cpLeftUntilComplete ( const tr_completion * cp )
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{
return cp->tor->info.totalSize - cp->sizeNow;
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}
cp_status_t
tr_cpGetStatus ( const tr_completion * cp )
{
if( cp->sizeNow == cp->tor->info.totalSize ) return TR_CP_COMPLETE;
if( cp->sizeNow == tr_cpSizeWhenDone(cp) ) return TR_CP_DONE;
return TR_CP_INCOMPLETE;
}
uint64_t
tr_cpHaveValid( const tr_completion * cp )
{
uint64_t b = 0;
tr_piece_index_t i;
const tr_torrent * tor = cp->tor;
for( i=0; i<tor->info.pieceCount; ++i )
if( tr_cpPieceIsComplete( cp, i ) )
b += tr_torPieceCountBytes( tor, i );
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return b;
}
uint64_t
tr_cpHaveTotal( const tr_completion * cp )
{
return cp->sizeNow;
}
void
tr_cpGetAmountDone( const tr_completion * cp, float * tab, int tabCount )
{
int i;
const tr_torrent * tor = cp->tor;
const float interval = tor->info.pieceCount / (float)tabCount;
const int isComplete = tr_cpGetStatus ( tor->completion ) == TR_CP_COMPLETE;
for( i=0; i<tabCount; ++i )
{
const tr_piece_index_t piece = i * interval;
if( tor == NULL )
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tab[i] = 0.0f;
else if( isComplete || tr_cpPieceIsComplete( cp, piece ) )
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tab[i] = 1.0f;
else
tab[i] = (float)cp->completeBlocks[piece] / tr_torPieceCountBlocks( tor, piece );
}
}