transmission/libtransmission/stats.c

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/*
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* This file Copyright (C) 2007-2008 Charles Kerr <charles@rebelbase.com>
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
* $Id$
*/
#include <string.h> /* memset */
#include "transmission.h"
#include "bencode.h"
#include "platform.h" /* tr_getPrefsDirectory */
#include "utils.h" /* tr_buildPath */
/***
****
***/
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struct tr_stats_handle
{
tr_session_stats single;
tr_session_stats old;
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time_t startTime;
};
static void
parseCumulativeStats( tr_session_stats * setme,
const uint8_t * content,
size_t len )
{
tr_benc top;
if( !tr_bencLoad( content, len, &top, NULL ) )
{
const tr_benc * val;
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if(( val = tr_bencDictFindType( &top, "uploaded-bytes", TYPE_INT )))
setme->uploadedBytes = (uint64_t) tr_bencGetInt( val );
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if(( val = tr_bencDictFindType( &top, "downloaded-bytes", TYPE_INT )))
setme->downloadedBytes = (uint64_t) tr_bencGetInt( val );
if(( val = tr_bencDictFindType( &top, "files-added", TYPE_INT )))
setme->filesAdded = (uint64_t) tr_bencGetInt( val );
if(( val = tr_bencDictFindType( &top, "session-count", TYPE_INT )))
setme->sessionCount = (uint64_t) tr_bencGetInt( val );
if(( val = tr_bencDictFindType( &top, "seconds-active", TYPE_INT )))
setme->secondsActive = (uint64_t) tr_bencGetInt( val );
tr_bencFree( &top );
}
}
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static char*
getFilename( char * buf, size_t buflen )
{
tr_buildPath( buf, buflen, tr_getPrefsDirectory(), "stats.benc", NULL );
return buf;
}
static void
loadCumulativeStats( tr_session_stats * setme )
{
size_t len;
uint8_t * content;
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char filename[MAX_PATH_LENGTH];
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getFilename( filename, sizeof(filename) );
content = tr_loadFile( filename, &len );
if( content != NULL )
parseCumulativeStats( setme, content, len );
tr_free( content );
}
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static void
saveCumulativeStats( const tr_session_stats * stats )
{
FILE * fp;
char * str;
char filename[MAX_PATH_LENGTH];
int len;
tr_benc top;
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tr_bencInit( &top, TYPE_DICT );
tr_bencDictReserve( &top, 5 );
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tr_bencInitInt( tr_bencDictAdd( &top, "uploaded-bytes" ), stats->uploadedBytes );
tr_bencInitInt( tr_bencDictAdd( &top, "downloaded-bytes" ), stats->downloadedBytes );
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tr_bencInitInt( tr_bencDictAdd( &top, "files-added" ), stats->filesAdded );
tr_bencInitInt( tr_bencDictAdd( &top, "session-count" ), stats->sessionCount );
tr_bencInitInt( tr_bencDictAdd( &top, "seconds-active" ), stats->secondsActive );
str = tr_bencSave( &top, &len );
getFilename( filename, sizeof(filename) );
fp = fopen( filename, "wb+" );
fwrite( str, 1, len, fp );
fclose( fp );
tr_free( str );
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tr_bencFree( &top );
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}
/***
****
***/
void
tr_statsInit( tr_handle * handle )
{
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struct tr_stats_handle * stats = tr_new0( struct tr_stats_handle, 1 );
loadCumulativeStats( &stats->old );
stats->single.sessionCount = 1;
stats->startTime = time( NULL );
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handle->sessionStats = stats;
}
void
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tr_statsClose( tr_handle * handle )
{
tr_session_stats cumulative;
tr_getCumulativeSessionStats( handle, &cumulative );
saveCumulativeStats( &cumulative );
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tr_free( handle->sessionStats );
handle->sessionStats = NULL;
}
static struct tr_stats_handle *
getStats( const tr_handle * handle )
{
static struct tr_stats_handle nullObject;
return handle && handle->sessionStats
? handle->sessionStats
: &nullObject;
}
/***
****
***/
static void
updateRatio( tr_session_stats * setme )
{
setme->ratio = tr_getRatio( setme->uploadedBytes,
setme->downloadedBytes );
}
static void
addStats( tr_session_stats * setme,
const tr_session_stats * a,
const tr_session_stats * b )
{
setme->uploadedBytes = a->uploadedBytes + b->uploadedBytes;
setme->downloadedBytes = a->downloadedBytes + b->downloadedBytes;
setme->filesAdded = a->filesAdded + b->filesAdded;
setme->sessionCount = a->sessionCount + b->sessionCount;
setme->secondsActive = a->secondsActive + b->secondsActive;
updateRatio( setme );
}
void
tr_getSessionStats( const tr_handle * handle,
tr_session_stats * setme )
{
const struct tr_stats_handle * stats = getStats( handle );
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*setme = stats->single;
setme->secondsActive = time( NULL ) - stats->startTime;
updateRatio( setme );
}
void
tr_getCumulativeSessionStats( const tr_handle * handle,
tr_session_stats * setme )
{
tr_session_stats current;
tr_getSessionStats( handle, &current );
addStats( setme, &getStats(handle)->old, &current );
}
/**
***
**/
void
tr_statsAddUploaded( tr_handle * handle, uint32_t bytes )
{
getStats(handle)->single.uploadedBytes += bytes;
}
void
tr_statsAddDownloaded( tr_handle * handle, uint32_t bytes )
{
getStats(handle)->single.downloadedBytes += bytes;
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}
void
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tr_statsFileCreated( tr_handle * handle )
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{
getStats(handle)->single.filesAdded++;
}