public bool WriteValues(string strPath, string strLogPath)
{
bool bSuccess = true;
StreamWriter swValues = null;
string strLine;
try
{
swValues = new StreamWriter(strPath);
for (int i = 0; i < this.Count; ++i)
{
CQuantity thisQuantity = this[i].Qty;
strLine = thisQuantity.ToString() + "\t" + thisQuantity.Log.ToString();
swValues.WriteLine(strLine);
}
}
catch (Exception e)
{
bSuccess = false;
string strLogEntry = "\r\n Error writing value file:" + e.Message;
File.AppendAllText(strLogPath, strLogEntry);
}
finally
{
if (swValues != null)
{
swValues.Close();
}
}
return(bSuccess);
}
// use to remove x = x or x = xabc where abc = 1
public void SuppressTautology(CQuantity thatQuantity)
{
CQuantity InverseQuantity = thatQuantity.InverseQty;
for (int i = this.Count - 1; i > 0; --i)
{
CExpression thisExpression = this[i];
if (thisExpression.Numerator.Find(thatQuantity.Label) > -1)
{
this.RemoveAt(i);
}
else if (thisExpression.Denominator.Find(thatQuantity.Label) > -1)
{
this.RemoveAt(i);
}
else if (InverseQuantity != null && thisExpression.Numerator.Find(InverseQuantity.Label) > -1)
{
this.RemoveAt(i);
}
else if (InverseQuantity != null && thisExpression.Denominator.Find(InverseQuantity.Label) > -1 &&
(thisExpression.Numerator.Count > 1 || (thisExpression.Numerator.Count != 0 && thisExpression.Numerator[0].Qty.Value != 1)))
{
this.RemoveAt(i);
}
else
{
// We don't want large integers in expressions
bool bRemoved = false;
int intIndex = thisExpression.Numerator.FindInteger();
if (intIndex >= 0)
{
if (thisExpression.Numerator[intIndex].Qty.Value > 256)
{
this.RemoveAt(i);
bRemoved = true;
}
}
if (!bRemoved)
{
intIndex = thisExpression.Denominator.FindInteger();
if (intIndex >= 0)
{
if (thisExpression.Denominator[intIndex].Qty.Value > 256)
{
this.RemoveAt(i);
}
}
}
}
}
}
// Construct the cell as the product or quotient of quantities x and y
public CMatrixCell(CQuantity quantityX, CQuantity quantityY, bool bIsProduct)
{
_isProduct = bIsProduct;
_ptrX = new CFactor(quantityX);
_ptrY = new CFactor(quantityY);
if (_isProduct)
{
_number = quantityX.Number.Product(quantityY.Number);
}
else
{
_number = quantityX.Number.Quotient(quantityY.Number);
}
_isExact = (quantityX.IsExact && quantityY.IsExact);
}
public bool WriteExpressions(string strPath, string strLogPath)
{
bool bSuccess = true;
StreamWriter swExpressions = null;
string strLine;
try
{
swExpressions = new StreamWriter(strPath);
for (int i = 0; i < this.Count; ++i)
{
CQuantity thisQuantity = this[i].Qty;
strLine = thisQuantity.SimpleLabel + "\t= ";
CExpressionList thisExpressionList = thisQuantity.ExpressionList;
thisExpressionList.SuppressDupes();
if (thisExpressionList.Count > 0)
{
strLine += thisExpressionList[0].ToString();
}
swExpressions.WriteLine(strLine);
for (int j = 1; j < thisExpressionList.Count; ++j)
{
strLine = "\t= " + thisExpressionList[j].ToString();
swExpressions.WriteLine(strLine);
}
}
}
catch (Exception e)
{
bSuccess = false;
string strLogEntry = "\r\n Error writing expression file:" + e.Message;
File.AppendAllText(strLogPath, strLogEntry);
}
finally
{
if (swExpressions != null)
{
swExpressions.Close();
}
}
return(bSuccess);
}
// true if this cell resolves to a quantity that is not just a factor of 1
public bool IsMatrixQuantity()
{
bool bReturn = true;
CQuantity qtyX = this.PtrX.Qty;
CQuantity qtyY = this.PtrY.Qty;
if (this.IsProduct)
{
if (qtyX.Label == "1" || qtyY.Label == "1")
{
bReturn = false;
}
}
else
{
if (qtyY.Label == "1")
{
bReturn = false;
}
}
return(bReturn);
}
public void Normalize()
{
int intNumIndex, intDenomIndex = 0;
_numerator.Normalize();
_denominator.Normalize();
if (_numerator.Count > 0 && _denominator.Count > 0)
{
for (intNumIndex = _numerator.Count - 1; intNumIndex > -1; --intNumIndex)
{
// if dupe is found in denominator then adjust both numerator and denominator
CFactor numeratorFactor = _numerator[intNumIndex];
intDenomIndex = _denominator.Find(numeratorFactor.Label);
if (intDenomIndex > -1)
{
CFactor denominatorFactor = _denominator[intDenomIndex];
numeratorFactor.DivideLike(denominatorFactor);
_denominator.RemoveAt(intDenomIndex);
_isLogValid = false;
}
// if inverse is found in denominator then adjust both numerator and denominator
intDenomIndex = _denominator.Find(numeratorFactor.Qty.InverseLabel);
if (intDenomIndex > -1)
{
CFactor denominatorFactor = _denominator[intDenomIndex];
CQuantity inverseQty = denominatorFactor.Qty.InverseQty;
denominatorFactor.Qty = inverseQty;
numeratorFactor.MultiplyLike(denominatorFactor);
_denominator.RemoveAt(intDenomIndex);
_isLogValid = false;
}
}
}
// if numerator factor has negative power swap it to denominator
for (intNumIndex = _numerator.Count - 1; intNumIndex > -1; --intNumIndex)
{
CFactor numeratorFactor = _numerator[intNumIndex];
if (numeratorFactor.Power == 0)
{
_numerator.RemoveAt(intNumIndex);
}
else if (numeratorFactor.Power < 0)
{
_numerator.RemoveAt(intNumIndex);
numeratorFactor.FlipPower();
_denominator.Add(numeratorFactor);
_isLogValid = false;
}
}
// if denominator factor has negative power swap it to numerator
for (intDenomIndex = _denominator.Count - 1; intDenomIndex > -1; --intDenomIndex)
{
CFactor denominatorFactor = _denominator[intDenomIndex];
if (denominatorFactor.Power == 0)
{
_denominator.RemoveAt(intDenomIndex);
}
else if (denominatorFactor.Power < 0)
{
_denominator.RemoveAt(intDenomIndex);
denominatorFactor.FlipPower();
_numerator.Add(denominatorFactor);
_isLogValid = false;
}
}
// net out integers between numerator and denominator
int intNumeratorIndex = _numerator.FindInteger();
int intDenominatorIndex = _denominator.FindInteger();
if (intNumeratorIndex > -1 && intDenominatorIndex > -1)
{
CFactor numeratorFactor = _numerator[intNumeratorIndex];
CFactor denominatorFactor = _denominator[intDenominatorIndex];
if (numeratorFactor.RatioPower.Equals(1) && denominatorFactor.RatioPower.Equals(1))
{
int intNumeratorValue = (int)numeratorFactor.Qty.Value;
int intDenominatorValue = (int)denominatorFactor.Qty.Value;
// Putting both integers into a CRatio has the effect of reducing them
CRatio ratioThis = new CRatio(intNumeratorValue, intDenominatorValue);
double dblNumerator = (double)ratioThis.Numerator;
double dblDenominator = (double)ratioThis.Denominator;
CNumber numberNumerator = new CNumber(dblNumerator);
CNumber numberDenominator = new CNumber(dblDenominator);
CQuantityList theQuantityList = numeratorFactor.Qty.QuantityList;
numeratorFactor.Qty = theQuantityList.ReplaceIntegerQuantity(numberNumerator);
denominatorFactor.Qty = theQuantityList.ReplaceIntegerQuantity(numberDenominator);
}
}
_numerator.Normalize();
_denominator.Normalize();
SetSymbolCount();
}
public CQtyPointer(CQuantity thisQuantity)
{
this.Qty = thisQuantity;
}
// This is a candidate group to define a quantity.
// 1. Determine if the quantity already exists.
// 2. If new then determine if it has enough members and sufficient diversity
// to define a new quantity.
// 3. Assign the quantity to every matrix cell in this group.
public void QualifyGroup(int intFirst, int intCount, CQuantityList myQuantityList)
{
CStringList labelList = new CStringList();
bool bGoodQuantity = true;
bool bIsExact = false; // set flag if this is new quantity
for (int i = intFirst; i < intFirst + intCount; ++i)
{
CMatrixCell myMatrixCell = this[i];
if (myMatrixCell.IsExact)
{
bIsExact = true;
}
CQuantity qtyX = myMatrixCell.PtrX.Qty;
CQuantity qtyY = myMatrixCell.PtrY.Qty;
if (!qtyX.IsInteger)
{
labelList.Add(qtyX.Label);
}
if (!qtyY.IsInteger)
{
labelList.Add(qtyY.Label);
}
}
if (labelList.Count > 1)
{
// This is a qualifying quantity
double dblLog = this[intFirst].Number.Log;
int intQtyIndex = myQuantityList.FindEquivalent(this[intFirst].Number);
bool bNewQuantity = (intQtyIndex < 0);
bGoodQuantity = true;
CQuantity thisQuantity;
if (bNewQuantity)
{
string strLabel = "X_" + myQuantityList.Count.ToString();
thisQuantity = new CQuantity(myQuantityList, strLabel, dblLog, false);
thisQuantity.IsExact = bIsExact;
myQuantityList.Add(thisQuantity);
}
else
{
thisQuantity = myQuantityList[intQtyIndex];
}
CSymbol symbolInverse = thisQuantity.SymbolInverse();
CQuantity inverseQuantity = thisQuantity.Inverse(symbolInverse.Label);
int intInverse = myQuantityList.FindEquivalent(inverseQuantity);
bool bNewInverse = (intInverse < 0);
if (bNewInverse)
{
myQuantityList.Add(inverseQuantity);
inverseQuantity.SetInverse(ref thisQuantity);
}
else
{
// inverse quantity already exists in the list
inverseQuantity = myQuantityList[intInverse];
if (bNewQuantity)
{
if (inverseQuantity.IsInteger)
{
// never add inverses to integers
bGoodQuantity = false;
myQuantityList.RemoveAt(thisQuantity.Index);
}
else
{
thisQuantity.Symbol = inverseQuantity.SymbolInverse();
thisQuantity.SetInverse(ref inverseQuantity);
thisQuantity.IsExact = inverseQuantity.IsExact;
}
}
}
if (bGoodQuantity)
{
// assign the quantity to every matrix cell in the group
for (int i = intFirst; i < intFirst + intCount; ++i)
{
CMatrixCell myMatrixCell = this[i];
myMatrixCell.PtrQty = new CQtyPointer(thisQuantity);
}
}
}
}
// Sort quantities and then combine dupes by adding powers.
public void Normalize()
{
Sort();
int i;
// combine like factors
for (i = this.Count - 1; i > 0; --i)
{
if (this[i].Label == this[i - 1].Label)
{
// n^x * n^y = n^xy
this[i - 1].MultiplyLike(this[i]);
this.RemoveAt(i);
}
}
// Simplify integer to a power
for (i = this.Count - 1; i > -1; --i)
{
CFactor thisFactor = this[i];
if (thisFactor.Qty.IsInteger && thisFactor.Power != 1)
{
thisFactor.ApplyPowerToInteger();
}
}
// combine integer factors
for (i = this.Count - 1; i > 0; --i)
{
CFactor thisFactor = this[i];
CFactor nextFactor = this[i - 1];
if (thisFactor.IsInteger && nextFactor.IsInteger)
{
// !!! ToDo: deal with root != 1
CNumber numberProduct = nextFactor.MultiplyIntegers(thisFactor);
CQuantityList theQuantityList = thisFactor.Qty.QuantityList;
// Because the calculated quantity value has changed, the factor qty must be replaced.
nextFactor.Qty = thisFactor.Qty.QuantityList.ReplaceIntegerQuantity(numberProduct);
this.RemoveAt(i);
}
}
// combine inverses
for (i = this.Count - 1; i > 0; --i)
{
CFactor thisFactor = this[i];
if (thisFactor.Power != 0)
{
CQuantity thisQuantity = thisFactor.Qty;
if (thisQuantity.InverseQty != null)
{
CQuantity inverseQty = thisQuantity.InverseQty;
int intInverse = this.Find(inverseQty.Label);
if (intInverse > -1)
{
// n^x * 1/n^y = n^x/n^y = n^(x-y)
CFactor inverseFactor = this[intInverse];
thisFactor.Qty = inverseFactor.Qty;
inverseFactor.DivideLike(thisFactor);
this.RemoveAt(i);
}
}
}
}
// drop factors that equal 1
for (i = this.Count - 1; i > -1; --i)
{
CFactor thisFactor = this[i];
// x^0 = 1 and log(1) = 0
// n*1 = n
if (thisFactor.Power == 0 || thisFactor.Log == 0)
{
this.RemoveAt(i);
}
}
}
public CFactor(CQuantity thatQuantity)
{
Init();
this._qty = thatQuantity;
}