rainmeter-studio/Library/MeasureDiskSpace.cpp

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/*
Copyright (C) 2001 Kimmo Pekkola
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#pragma warning(disable: 4996)
#include "StdAfx.h"
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#include "MeasureDiskSpace.h"
#include "Rainmeter.h"
/*
** CMeasureDiskSpace
**
** The constructor
**
*/
CMeasureDiskSpace::CMeasureDiskSpace(CMeterWindow* meterWindow) : CMeasure(meterWindow)
{
m_Total = false;
m_Label = false;
m_IgnoreRemovable = true;
m_OldTotalBytes = 0;
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}
/*
** ~CMeasureDiskSpace
**
** The destructor
**
*/
CMeasureDiskSpace::~CMeasureDiskSpace()
{
}
/*
** Update
**
** Updates the current disk free space value.
**
*/
bool CMeasureDiskSpace::Update()
{
if (!CMeasure::PreUpdate()) return false;
if (!m_Drive.empty())
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{
UINT type = GetDriveType(m_Drive.c_str());
if (type != DRIVE_NO_ROOT_DIR)
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{
if (type != DRIVE_CDROM && (!m_IgnoreRemovable || type != DRIVE_REMOVABLE)) // Ignore CD-ROMS and removable drives
{
ULARGE_INTEGER i64FreeBytesToCaller, i64TotalBytes, i64FreeBytes;
UINT oldMode = SetErrorMode(0);
SetErrorMode(oldMode | SEM_FAILCRITICALERRORS); // Prevent the system from displaying message box
SetLastError(ERROR_SUCCESS);
BOOL result = GetDiskFreeSpaceEx(m_Drive.c_str(), &i64FreeBytesToCaller, &i64TotalBytes, &i64FreeBytes);
DWORD err = GetLastError();
SetErrorMode(oldMode); // Reset
if (result)
{
LARGE_INTEGER tmpInt;
if (m_Total)
{
tmpInt.QuadPart = i64TotalBytes.QuadPart;
}
else
{
tmpInt.QuadPart = i64FreeBytes.QuadPart;
}
m_Value = (double)tmpInt.QuadPart;
if (i64TotalBytes.QuadPart != m_OldTotalBytes)
{
// Total size was changed, so set new max value.
tmpInt.QuadPart = i64TotalBytes.QuadPart;
m_MaxValue = (double)tmpInt.QuadPart;
m_OldTotalBytes = i64TotalBytes.QuadPart;
}
}
else if (err == ERROR_NOT_READY)
{
// Media isn't ready, so reset to zero.
m_Value = 0;
m_OldTotalBytes = 0;
}
}
else
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{
m_Value = 0;
m_OldTotalBytes = 0;
}
if (m_Label)
{
if (!m_IgnoreRemovable || type != DRIVE_REMOVABLE) // Ignore removable drives
{
WCHAR volumeName[MAX_PATH] = {0};
UINT oldMode = SetErrorMode(0);
SetErrorMode(oldMode | SEM_FAILCRITICALERRORS); // Prevent the system from displaying message box
BOOL result = GetVolumeInformation(m_Drive.c_str(), volumeName, MAX_PATH, NULL, NULL, NULL, NULL, 0);
SetErrorMode(oldMode); // Reset
if (result)
{
m_LabelName = volumeName;
}
else
{
m_LabelName = L"";
}
}
else
{
m_LabelName = L"";
}
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}
}
else // Drive path is invalid.
{
m_Value = 0;
m_OldTotalBytes = 0;
if (m_Label) m_LabelName = L"";
}
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}
return PostUpdate();
}
/*
** GetStringValue
**
** Returns the time as string.
**
*/
const WCHAR* CMeasureDiskSpace::GetStringValue(bool autoScale, double scale, int decimals, bool percentual)
{
if (m_Label)
{
return CheckSubstitute(m_LabelName.c_str());
}
return CMeasure::GetStringValue(autoScale, scale, decimals, percentual);
}
/*
** ReadConfig
**
** Reads the measure specific configs.
**
*/
void CMeasureDiskSpace::ReadConfig(CConfigParser& parser, const WCHAR* section)
{
CMeasure::ReadConfig(parser, section);
m_Drive = parser.ReadString(section, L"Drive", L"C:\\");
if (m_Drive.empty())
{
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LSLog(LOG_DEBUG, APPNAME, L"Drive path is not given.");
m_Value = 0;
m_LabelName = L"";
}
else if (m_Drive[m_Drive.length() - 1] != L'\\') // E.g. "C:"
{
m_Drive += L"\\"; // A trailing backslash is required.
}
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m_Total = (1 == parser.ReadInt(section, L"Total", 0));
m_Label = (1 == parser.ReadInt(section, L"Label", 0));
m_IgnoreRemovable = (1 == parser.ReadInt(section, L"IgnoreRemovable", 1));
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// Set the m_MaxValue
if (!m_Drive.empty())
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{
UINT type = GetDriveType(m_Drive.c_str());
if (type != DRIVE_NO_ROOT_DIR &&
type != DRIVE_CDROM && (!m_IgnoreRemovable || type != DRIVE_REMOVABLE)) // Ignore CD-ROMS and removable drives
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{
ULARGE_INTEGER i64FreeBytesToCaller, i64TotalBytes, i64FreeBytes;
UINT oldMode = SetErrorMode(0);
SetErrorMode(oldMode | SEM_FAILCRITICALERRORS); // Prevent the system from displaying message box
BOOL result = GetDiskFreeSpaceEx(m_Drive.c_str(), &i64FreeBytesToCaller, &i64TotalBytes, &i64FreeBytes);
SetErrorMode(oldMode); // Reset
if (result)
{
LARGE_INTEGER tmpInt;
tmpInt.QuadPart = i64TotalBytes.QuadPart;
m_MaxValue = (double)tmpInt.QuadPart;
m_OldTotalBytes = i64TotalBytes.QuadPart;
}
else
{
m_OldTotalBytes = 0;
}
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}
}
}