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resistor.cpp
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resistor.cpp
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#include "resistor.h"
#include "math.h"
#include "QDebug"
Resistor::Resistor(void)
{
resValue = 0;
}
Int64 Resistor::Value(void)
{
return resValue;
}
void Resistor::setValue(Int64 value)
{
resValue = value;
}
QString Resistor::ValueStr(void)
{
return this->ToString ();
}
void Resistor::setValueStr(QString value)
{
resValue = FromStringToValue(value);
}
QString Resistor::ToString()
{
QString resString;
resString = QString("%1").arg(resValue);
int len = resString.length();
if (len > 6)
{
if (resString.mid(len-6,6) == "000000")
{
resString = resString.mid(0,len-6);
resString += "M";
}
}
len = resString.length();
if (len > 3)
{
if (resString.mid(len-3,3) == "000")
{
resString = resString.mid(0,len-3);
resString += "k";
}
}
return resString;
}
Int64 Resistor::FromStringToValue(QString str)
{
Int64 retVal;
str = str.replace("M","000000");
str = str.replace("k","000");
bool ok;
retVal = str.toFloat(&ok);
if (!ok) retVal = 0;
return retVal;
}
int* Resistor::GetE12Values(void)
{
static int E_Values[] = {10,12,15,18,22,27,33,39,47,56,68,82};
return E_Values;
}
QString Resistor::E12ValuesToString(void)
{
QString retVal;
int* values = GetE12Values();
int i;
for (i=0;i<12;i++)
{
retVal+=QString("%1").arg(values[i]);
if (i<11)
{
retVal+=",";
}
}
return retVal;
}
int* Resistor::GetE24Values(void)
{
static int E_Values[] = {10,11,12,13,15,16,18,20,22,24,27,30,
33,36,39,43,47,51,56,62,68,75,82,91};
return E_Values;
}
QString Resistor::E24ValuesToString(void)
{
QString retVal;
int* values = GetE24Values();
int i;
for (i=0;i<24;i++)
{
retVal+=QString("%1").arg(values[i]);
if (i<23)
{
retVal+=",";
}
}
return retVal;
}
bool Resistor::IsE12(Int64 val)
{
int* E_Values = GetE12Values();
return IsE (val,E_Values,12);
}
bool Resistor::IsE24(Int64 val)
{
int* E_Values = GetE24Values();
return IsE (val,E_Values,24);
}
int Resistor::GetTwoDigit(Int64 val)
{
int retVal;
if (val < 10)
{
retVal = (int)val;
}
else
{
QString str = QString("%1").arg(val);
str = str.mid(0,2);
bool ok;
retVal = str.toFloat(&ok);
if (!ok) retVal = 0;
}
return retVal;
}
/* Order is the number of digit other that first two*/
int Resistor::GetOrder(Int64 val)
{
int retVal = 0;
QString str = QString("%1").arg(val);
if (str.length()>2)
{
retVal = str.length()-2;
}
return (retVal);
}
bool Resistor::IsE(Int64 val,int* E_Values,int nValues)
{
int TwoDigit = GetTwoDigit(val);
bool found = false;
int i,value;
for (i = 0; i < nValues; i++)
{
value = E_Values[i];
if (value == TwoDigit)
{
found = true;
}
}
return found;
}
Int64 Resistor::ToNearE12(Int64 val)
{
int order = GetOrder(val);
qDebug()<<QString("Resistor::ToNearE12 - order:%1").arg(order);
int TwoDigit = GetTwoDigit(val);
qDebug()<<QString("Resistor::ToNearE12 - TwoDigit:%1").arg(TwoDigit);
int* E_Values = GetE12Values();
int E_Greater = 0;
int E_Lesser = 0;
int i,value;
for (i = 0; i < 12; i++)
{
value = E_Values[i];
if (value >= TwoDigit)
{
E_Greater = value;
break;
}
}
int j;
for (j = 12 - 1; j > -1; j--)
{
if (E_Values[j] <= TwoDigit)
{
E_Lesser = E_Values[j];
break;
}
}
if (E_Lesser == 0)
{
return (Int64)(E_Greater * pow(10,order));
}
if (E_Greater == 0)
{
return (Int64)(E_Lesser * pow(10,order));
}
/* Calculate near */
if ((TwoDigit-E_Lesser)<(E_Greater-TwoDigit))
{
return (Int64)(E_Lesser * pow(10,order));
}
else
{
return (Int64)(E_Greater * pow(10,order));
}
}