rainmeter-studio/Library/MeasureCalc.cpp

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2009-02-10 18:37:48 +00:00
/*
Copyright (C) 2004 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 "MeasureCalc.h"
#include "Rainmeter.h"
#include <cstdlib>
#include <ctime>
#include <sstream>
using namespace std;
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hqStrMap* CMeasureCalc::c_VarMap = NULL;
/*
** CMeasureCalc
**
** The constructor
**
*/
CMeasureCalc::CMeasureCalc(CMeterWindow* meterWindow) : CMeasure(meterWindow)
{
m_Parser = MathParser_Create(NULL);
srand((unsigned)time(0));
rand();
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}
/*
** ~CMeasureCalc
**
** The destructor
**
*/
CMeasureCalc::~CMeasureCalc()
{
MathParser_Destroy(m_Parser);
if (c_VarMap)
{
StrMap_Destroy(c_VarMap);
c_VarMap = NULL;
}
}
/*
** Update
**
** Updates the calculation
**
*/
bool CMeasureCalc::Update()
{
if (!CMeasure::PreUpdate()) return false;
m_Parser->Parameters = c_VarMap;
if(m_UpdateRandom > 0)
{
RandomFormulaReplace();
}
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char* errMsg = MathParser_Parse(m_Parser, ConvertToAscii(m_Formula.c_str()).c_str(), &m_Value);
if (errMsg != NULL)
{
DebugLog(ConvertToWide(errMsg).c_str());
}
return PostUpdate();
}
void CMeasureCalc::UpdateVariableMap(CMeterWindow& meterWindow)
{
// Delete the old map
if (c_VarMap)
{
StrMap_Destroy(c_VarMap);
c_VarMap = NULL;
}
// Create the variable map
c_VarMap = Strmap_Create(sizeof(double), 0);
std::list<CMeasure*>& measures = meterWindow.GetMeasures();
std::list<CMeasure*>::iterator iter = measures.begin();
for( ; iter != measures.end(); iter++)
{
const char* name = (*iter)->GetANSIName();
double val = (*iter)->GetValue();
StrMap_AddString(c_VarMap, name, &val);
}
// Add the counter
double counter = meterWindow.GetUpdateCounter();
StrMap_AddString(c_VarMap, "Counter", &counter);
}
/*
** ReadConfig
**
** Reads the measure specific configs.
**
*/
void CMeasureCalc::ReadConfig(CConfigParser& parser, const WCHAR* section)
{
CMeasure::ReadConfig(parser, section);
m_Formula = parser.ReadString(section, L"Formula", L"");
// Hold onto the formula, we are going to change it
m_FormulaHolder = m_Formula;
m_LowBound = parser.ReadFloat(section, L"LowBound", 0);
m_HighBound = parser.ReadFloat(section, L"HighBound", 100);
m_UpdateRandom = parser.ReadInt(section, L"UpdateRandom", 0);
RandomFormulaReplace();
}
/*
** RandomFormulaReplace
**
** This replaces the word Random in m_Formula with a random number
**
*/
void CMeasureCalc::RandomFormulaReplace()
{
//To implement random numbers the word "Random" in the string
//formula is being replaced by the random number value
m_Formula = m_FormulaHolder;
int loc = m_Formula.find(L"Random");
while(loc > -1)
{
int range = (m_HighBound - m_LowBound);
int randNumber = m_LowBound + (range * rand()/(RAND_MAX + 1.0));
std::wstring randomNumberString= (L"");
wchar_t buf[8];
_itow(randNumber,buf,10);
randomNumberString.append(buf);
m_Formula.replace(loc, 6, randomNumberString);
loc = m_Formula.find(L"Random");
}
}