The Calculator class for calculation formula. More...

#include <calculator.h>

Inheritance diagram for Calculator:

Collaboration diagram for Calculator:

Public Member Functions
	Calculator ()
	Calculator class wraper for QMuParser. Make easy initialization math parser. More...

virtual	~Calculator () Q_DECL_EQ_DEFAULT

qreal	EvalFormula (const QHash< QString, QSharedPointer< VInternalVariable > > *vars, const QString &formula)
	eval calculate formula. More...

Public Member Functions inherited from qmu::QmuFormulaBase
	QmuFormulaBase ()

virtual	~QmuFormulaBase () Q_DECL_OVERRIDE

virtual void	InitCharSets () Q_DECL_OVERRIDE
	InitCharSets init character set for parser. More...

Public Member Functions inherited from qmu::QmuParser
	QmuParser ()
	Constructor. More...

virtual void	InitFun () Q_DECL_OVERRIDE
	Initialize the default functions. More...

virtual void	InitConst () Q_DECL_OVERRIDE
	Initialize constants. More...

virtual void	InitOprt () Q_DECL_OVERRIDE
	Initialize operators. More...

virtual void	OnDetectVar (const QString &pExpr, int &nStart, int &nEnd) Q_DECL_OVERRIDE

qreal	Diff (qreal *a_Var, qreal a_fPos, qreal a_fEpsilon=0) const
	Numerically differentiate with regard to a variable. More...

Public Member Functions inherited from qmu::QmuParserBase
	QmuParserBase ()
	Constructor. More...

	QmuParserBase (const QmuParserBase &a_Parser)
	Copy constructor. More...

QmuParserBase &	operator= (const QmuParserBase &a_Parser)
	Assignement operator. More...

virtual	~QmuParserBase ()

qreal	Eval () const
	Calculate the result. More...

qreal *	Eval (int &nStackSize) const
	Evaluate an expression containing comma seperated subexpressions. More...

void	Eval (qreal *results, int nBulkSize) const

int	GetNumResults () const
	Return the number of results on the calculation stack. More...

void	SetExpr (const QString &a_sExpr)
	Set the formula. More...

void	SetVarFactory (facfun_type a_pFactory, void *pUserData=nullptr)
	Set a function that can create variable pointer for unknown expression variables. More...

void	ResetLocale ()
	Resets the locale. More...

void	EnableOptimizer (bool a_bIsOn=true)
	Enable or disable the formula optimization feature. More...

void	EnableBuiltInOprt (bool a_bIsOn=true)
	Enable or disable the built in binary operators. More...

bool	HasBuiltInOprt () const
	Query status of built in variables. More...

void	AddValIdent (identfun_type a_pCallback)
	Add a value parsing function. More...

void	DefineOprt (const QString &a_sName, fun_type2 a_pFun, unsigned a_iPrec=0, EOprtAssociativity a_eAssociativity=oaLEFT, bool a_bAllowOpt=false)
	Define a binary operator. More...

void	DefineConst (const QString &a_sName, qreal a_fVal)
	Add a user defined constant. More...

void	DefineStrConst (const QString &a_strName, const QString &a_strVal)
	Define a new string constant. More...

void	DefineVar (const QString &a_sName, qreal *a_pVar)
	Add a user defined variable. More...

void	DefinePostfixOprt (const QString &a_sFun, fun_type1 a_pFun, bool a_bAllowOpt=true)
	Add a user defined operator. More...

void	DefineInfixOprt (const QString &a_sName, fun_type1 a_pFun, int a_iPrec=prINFIX, bool a_bAllowOpt=true)
	Add a user defined operator. More...

void	ClearVar ()
	Clear all user defined variables. More...

void	ClearFun ()
	Clear all functions. More...

void	ClearConst ()
	Clear all user defined constants. More...

void	ClearInfixOprt ()
	Clear the user defined Prefix operators. More...

void	ClearPostfixOprt ()
	Clear all user defined postfix operators. More...

void	ClearOprt ()
	Clear all user defined binary operators. More...

void	RemoveVar (const QString &a_strVarName)
	Remove a variable from internal storage. More...

const varmap_type &	GetUsedVar () const
	Return a map containing the used variables only. More...

const varmap_type &	GetVar () const
	Return a map containing the used variables only. More...

const valmap_type &	GetConst () const
	Return a map containing all parser constants. More...

const QString &	GetExpr () const
	Retrieve the formula. More...

const funmap_type &	GetFunDef () const
	Return prototypes of all parser functions. More...

QMap< int, QString >	GetTokens () const

QMap< int, QString >	GetNumbers () const

void	DefineNameChars (const QString &a_szCharset)
	Define the set of valid characters to be used in names of functions, variables, constants. More...

void	DefineOprtChars (const QString &a_szCharset)
	Define the set of valid characters to be used in names of binary operators and postfix operators. More...

void	DefineInfixOprtChars (const QString &a_szCharset)
	Define the set of valid characters to be used in names of infix operators. More...

const QString &	ValidNameChars () const
	Virtual function that defines the characters allowed in name identifiers. More...

const QString &	ValidOprtChars () const
	Virtual function that defines the characters allowed in operator definitions. More...

const QString &	ValidInfixOprtChars () const
	Virtual function that defines the characters allowed in infix operator definitions. More...

void	SetArgSep (char_type cArgSep)
	Set argument separator. More...

QChar	GetArgSep () const
	Get the argument separator character. More...

void Q_NORETURN	Error (EErrorCodes a_iErrc, int a_iPos=-1, const QString &a_sTok=QString()) const
	Create an error containing the parse error position. More...

template<typename T >
void	DefineFun (const QString &a_strName, T a_pFun, bool a_bAllowOpt=true)
	Define a parser function without arguments. More...

void	setAllowSubexpressions (bool value)

QLocale	getLocale () const

void	setLocale (const QLocale &value)

QChar	getDecimalPoint () const

void	setDecimalPoint (const QChar &c)

QChar	getThousandsSeparator () const

void	setThousandsSeparator (const QChar &c)

Private Member Functions
void	InitVariables (const QHash< QString, QSharedPointer< VInternalVariable > > *vars, const QMap< int, QString > &tokens, const QString &formula)
	Calculator::InitVariables add variables to parser. More...

Additional Inherited Members
Static Public Member Functions inherited from qmu::QmuFormulaBase
static void	RemoveAll (QMap< int, QString > &map, const QString &val)
	RemoveAll remove token from token list. More...

Static Public Member Functions inherited from qmu::QmuParserBase
static void	EnableDebugDump (bool bDumpCmd, bool bDumpStack)
	Enable the dumping of bytecode amd stack content on the console. More...

static QString	GetVersion (EParserVersionInfo eInfo=pviFULL)
	Returns the version of muparser. More...

static const QStringList &	GetOprtDef ()
	Get the default symbols used for the built in operators. More...

Protected Member Functions inherited from qmu::QmuFormulaBase
void	SetSepForTr (bool osSeparator, bool fromUser)
	SetSepForTr set separators for translation expression. More...

void	SetSepForEval ()
	SetSepForEval set separators for eval. Each expression eval in internal (C) locale. More...

Protected Member Functions inherited from qmu::QmuParserBase
void	Init ()
	Initialize user defined functions. More...

Static Protected Member Functions inherited from qmu::QmuFormulaBase
static qreal *	AddVariable (const QString &a_szName, void *a_pUserData)

Static Protected Member Functions inherited from qmu::QmuParser
static int	IsVal (const QString &a_szExpr, int a_iPos, qreal a_fVal, const QLocale &locale, const QChar &decimal, const QChar &thousand)
	Default value recognition callback. More...

static qreal	Sinh (qreal)

static qreal	Cosh (qreal)

static qreal	Tanh (qreal)

static qreal	ASinh (qreal)

static qreal	ACosh (qreal)

static qreal	ATanh (qreal)

static qreal	DegreeToRadian (qreal)

static qreal	RadianToDegree (qreal)

static qreal	SinD (qreal)

static qreal	CosD (qreal)

static qreal	TanD (qreal)

static qreal	ASinD (qreal)

static qreal	ACosD (qreal)

static qreal	ATanD (qreal)

static qreal	Log2 (qreal)

static qreal	Log10 (qreal)

static qreal	Abs (qreal)

static qreal	Rint (qreal)

static qreal	Sign (qreal)

static qreal	FMod (qreal, qreal)

static qreal	UnaryMinus (qreal v)
	Callback for the unary minus operator. More...

static qreal	Sum (const qreal *, int)
	Callback for adding multiple values. More...

static qreal	Avg (const qreal *, int)
	Callback for averaging multiple values. More...

static qreal	Min (const qreal *, int)
	Callback for determining the minimum value out of a vector. More...

static qreal	Max (const qreal *, int)
	Callback for determining the maximum value out of a vector. More...

Protected Attributes inherited from qmu::QmuParserBase
QLocale	m_locale
	The locale used by the parser. More...

QChar	m_decimalPoint

QChar	m_thousandsSeparator

Static Protected Attributes inherited from qmu::QmuParserBase
static const QStringList	c_DefaultOprt
	Identifiers for built in binary operators. More...

static bool	g_DbgDumpCmdCode = false

static bool	g_DbgDumpStack = false

Detailed Description

The Calculator class for calculation formula.

Main purpose make easy evaluate value of formula and get tokens. Note. If created to many parser for different purpes in the same time parser can work wrong. Example: EditFormulaDialog *dialog = new EditFormulaDialog(data); dialog->SetFormula(formula); if (dialog->exec() == QDialog::Accepted) { formula = dialog->GetFormula(); //Need delete dialog here because parser in dialog don't allow use correct separator for parsing here. //Don't know why. delete dialog; QScopedPointer<Calculator> cal(new Calculator()); result = cal->EvalFormula(data->PlainVariables(), formula); }

Definition at line 83 of file calculator.h.

Constructor & Destructor Documentation

◆ Calculator()

Calculator::Calculator ( )

Calculator class wraper for QMuParser. Make easy initialization math parser.

This constructor hide initialization variables, operators, character sets. Use this constuctor for evaluation formula. All formulas must be converted to internal look. Example:

const QString formula = qApp->FormulaFromUser(edit->text()); Calculator *cal = new Calculator(data, patternType); const qreal result = cal->EvalFormula(data->PlainVariables(), formula); delete cal;

Definition at line 77 of file calculator.cpp.

References qmu::QmuFormulaBase::InitCharSets(), qmu::QmuParserBase::setAllowSubexpressions(), and qmu::QmuFormulaBase::SetSepForEval().

◆ ~Calculator()

virtual Calculator::~Calculator ( )

virtual

Member Function Documentation

◆ EvalFormula()

qreal Calculator::EvalFormula	(	const QHash< QString, QSharedPointer< VInternalVariable > > *	vars,
		const QString &	formula
	)

eval calculate formula.

First we try eval expression without adding variables. If it fail, we take tokens from expression and add variables to parser and try again.

Parameters

formula string of formula.

Returns: value of formula.

Definition at line 96 of file calculator.cpp.

References qmu::QmuFormulaBase::AddVariable(), builInFunctions, qmu::QmuParserBase::Eval(), qmu::QmuParserBase::GetTokens(), InitVariables(), qmu::QmuFormulaBase::RemoveAll(), qmu::QmuParserBase::SetExpr(), qmu::QmuFormulaBase::SetSepForEval(), and qmu::QmuParserBase::SetVarFactory().

Referenced by anonymous_namespace{vlayoutpiece.cpp}::FindGrainlineGeometry(), PatternPieceTool::FindGrainlineGeometry(), anonymous_namespace{vlayoutpiece.cpp}::FindLabelGeometry(), PatternPieceTool::FindLabelGeometry(), PatternPieceDialog::getFormulaValue(), PatternPieceDialog::updateGrainlineValues(), PatternPieceDialog::updatePatternLabelValues(), and PatternPieceDialog::updatePieceLabelValues().

◆ InitVariables()

void Calculator::InitVariables	(	const QHash< QString, QSharedPointer< VInternalVariable > > *	vars,
		const QMap< int, QString > &	tokens,
		const QString &	formula
	)

private

Calculator::InitVariables add variables to parser.

For optimization purpose we try don't add variables that we don't need.

Parameters

vars	list of variables.
tokens	all tokens (measurements names, variables with lengths) that parser have found in expression.
formula	expression, need for throwing better error message.

Definition at line 142 of file calculator.cpp.

References builInFunctions, qmu::QmuParserBase::DefineVar(), and qmu::ecUNASSIGNABLE_TOKEN.

Referenced by EvalFormula().

The documentation for this class was generated from the following files:

src/libs/vpatterndb/calculator.h
src/libs/vpatterndb/calculator.cpp

Public Member Functions

Private Member Functions