rainmeter-studio/Plugins/PluginPerfMon/PerfCntr.cpp

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2009-02-10 18:37:48 +00:00
//====================================
// File: PERFCNTR.CPP
// Author: Matt Pietrek
// From: Microsoft Systems Journal
// "Under the Hood", APRIL 1996
//====================================
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <winperf.h>
#include <stdlib.h>
#include <stdio.h>
#include <malloc.h>
#include <tchar.h>
#pragma hdrstop
#include "perfcntr.h"
CPerfCounter::CPerfCounter( PTSTR const pszName, DWORD type,
PBYTE const pData, DWORD cbData )
{
m_pszName = _tcsdup( pszName );
m_type = type;
m_cbData = cbData;
m_pData = new BYTE[m_cbData];
memcpy( m_pData, pData, m_cbData );
}
CPerfCounter::~CPerfCounter( void )
{
free( m_pszName );
delete []m_pData;
}
BOOL
CPerfCounter::GetData( PBYTE pBuffer, DWORD cbBuffer, DWORD *pType )
{
if ( cbBuffer < m_cbData ) // Make sure the buffer is big enough
return FALSE;
memcpy( pBuffer, m_pData, m_cbData ); // copy the data
if ( pType ) // If the user wants the type, give it to them
*pType = m_type;
return TRUE;
}
BOOL
CPerfCounter::Format( PTSTR pszBuffer, DWORD nSize, BOOL fHex )
{
// Do better formatting!!! Check length!!!
PTSTR pszPrefix = TEXT("");
TCHAR szTemp[512];
// First, ascertain the basic type (number, counter, text, or zero)
switch ( m_type & 0x00000C00 )
{
case PERF_TYPE_ZERO:
{
wsprintf( pszBuffer, TEXT("ZERO") ); return TRUE;
}
case PERF_TYPE_TEXT:
{
wsprintf( pszBuffer, TEXT("text counter") ); return TRUE;
}
case PERF_TYPE_COUNTER:
{
switch( m_type & 0x00070000 )
{
case PERF_COUNTER_RATE:
pszPrefix = TEXT("counter rate "); break;
case PERF_COUNTER_FRACTION:
pszPrefix = TEXT("counter fraction "); break;
case PERF_COUNTER_BASE:
pszPrefix = TEXT("counter base "); break;
case PERF_COUNTER_ELAPSED:
pszPrefix = TEXT("counter elapsed "); break;
case PERF_COUNTER_QUEUELEN:
pszPrefix = TEXT("counter queuelen "); break;
case PERF_COUNTER_HISTOGRAM:
pszPrefix = TEXT("counter histogram "); break;
default:
pszPrefix = TEXT("counter value "); break;
}
}
}
PTSTR pszFmt = fHex ? TEXT("%s%Xh") : TEXT("%s%u");
switch ( m_cbData )
{
case 1: wsprintf(szTemp, pszFmt, pszPrefix, *(PBYTE)m_pData);
break;
case 2: wsprintf(szTemp, pszFmt, pszPrefix, *(PWORD)m_pData);
break;
case 4: wsprintf(szTemp, pszFmt, pszPrefix, *(PDWORD)m_pData);
break;
case 8: // Danger! Assumes little-endian (X86) byte ordering
wsprintf( szTemp, TEXT("%s%X%X"), pszPrefix,
*(PDWORD)(m_pData+4), *(PDWORD)m_pData ); break;
break;
default: wsprintf( szTemp, TEXT("<unhandled size %u>"), m_cbData );
}
switch ( m_type & 0x70000000 )
{
case PERF_DISPLAY_SECONDS:
_tcscat( szTemp, TEXT(" secs") ); break;
case PERF_DISPLAY_PERCENT:
_tcscat( szTemp, TEXT(" %") ); break;
case PERF_DISPLAY_PER_SEC:
_tcscat( szTemp, TEXT(" /sec") ); break;
}
lstrcpyn( pszBuffer, szTemp, nSize );
return TRUE;
}