EnhancedPathFormula.cpp File Reference

#include "EnhancedPathFormula.h"
#include "EnhancedPathShape.h"
#include <QStack>
#include <math.h>
#include <QDebug>

Go to the source code of this file.

Classes
class	FormulaTokenStack
class	Opcode

Functions
bool	isIdentifier (QChar ch)
EnhancedPathFormula::Function	matchFunction (const QString &text)
QString	matchFunction (EnhancedPathFormula::Function function)
FormulaToken::Operator	matchOperator (const QString &text)
int	opPrecedence (FormulaToken::Operator op)

Function Documentation

isIdentifier()

bool isIdentifier

(

QChar

ch

)

Definition at line 718 of file EnhancedPathFormula.cpp.

{
    return (ch.unicode() == '?') || (ch.unicode() == '$') || (ch.isLetter());
}

matchFunction() [1/2]

EnhancedPathFormula::Function matchFunction

(

const QString &

text

)

Definition at line 741 of file EnhancedPathFormula.cpp.

{
    if (text == "abs") {
        return EnhancedPathFormula::FunctionAbs;
    }
    if (text == "sqrt") {
        return EnhancedPathFormula::FunctionSqrt;
    }
    if (text == "sin") {
        return EnhancedPathFormula::FunctionSin;
    }
    if (text == "cos") {
        return EnhancedPathFormula::FunctionCos;
    }
    if (text == "tan") {
        return EnhancedPathFormula::FunctionTan;
    }
    if (text == "atan") {
        return EnhancedPathFormula::FunctionAtan;
    }
    if (text == "atan2") {
        return EnhancedPathFormula::FunctionAtan2;
    }
    if (text == "min") {
        return EnhancedPathFormula::FunctionMin;
    }
    if (text == "max") {
        return EnhancedPathFormula::FunctionMax;
    }
    if (text == "if") {
        return EnhancedPathFormula::FunctionIf;
    }
 
    return EnhancedPathFormula::FunctionUnknown;
}

References EnhancedPathFormula::FunctionAbs, EnhancedPathFormula::FunctionAtan, EnhancedPathFormula::FunctionAtan2, EnhancedPathFormula::FunctionCos, EnhancedPathFormula::FunctionIf, EnhancedPathFormula::FunctionMax, EnhancedPathFormula::FunctionMin, EnhancedPathFormula::FunctionSin, EnhancedPathFormula::FunctionSqrt, EnhancedPathFormula::FunctionTan, and EnhancedPathFormula::FunctionUnknown.

matchFunction() [2/2]

QString matchFunction

(

EnhancedPathFormula::Function

function

)

Definition at line 777 of file EnhancedPathFormula.cpp.

{
    switch (function) {
    case EnhancedPathFormula::FunctionAbs:
        return "fabs";
        break;
    case EnhancedPathFormula::FunctionSqrt:
        return "sqrt";
        break;
    case EnhancedPathFormula::FunctionSin:
        return "sin";
        break;
    case EnhancedPathFormula::FunctionCos:
        return "cos";
        break;
    case EnhancedPathFormula::FunctionTan:
        return "tan";
        break;
    case EnhancedPathFormula::FunctionAtan:
        return "atan";
        break;
    case EnhancedPathFormula::FunctionAtan2:
        return "atan2";
        break;
    case EnhancedPathFormula::FunctionMin:
        return "min";
        break;
    case EnhancedPathFormula::FunctionMax:
        return "max";
        break;
    case EnhancedPathFormula::FunctionIf:
        return "if";
        break;
    default:
        break;
    }
 
    return "unknown";
}

References EnhancedPathFormula::FunctionAbs, EnhancedPathFormula::FunctionAtan, EnhancedPathFormula::FunctionAtan2, EnhancedPathFormula::FunctionCos, EnhancedPathFormula::FunctionIf, EnhancedPathFormula::FunctionMax, EnhancedPathFormula::FunctionMin, EnhancedPathFormula::FunctionSin, EnhancedPathFormula::FunctionSqrt, and EnhancedPathFormula::FunctionTan.

matchOperator()

FormulaToken::Operator matchOperator

(

const QString &

text

)

Definition at line 698 of file EnhancedPathFormula.cpp.

{
    if (text.length() != 1) {
        return FormulaToken::OperatorInvalid;
    }
 
    const char c = text[0].toLatin1();
    switch (c) {
    case '+': return FormulaToken::OperatorAdd; break;
    case '-': return FormulaToken::OperatorSub; break;
    case '*': return FormulaToken::OperatorMul; break;
    case '/': return FormulaToken::OperatorDiv; break;
    case '(': return FormulaToken::OperatorLeftPar; break;
    case ')': return FormulaToken::OperatorRightPar; break;
    case ',': return FormulaToken::OperatorComma; break;
    default : return FormulaToken::OperatorInvalid; break;
    }
}

References FormulaToken::OperatorAdd, FormulaToken::OperatorComma, FormulaToken::OperatorDiv, FormulaToken::OperatorInvalid, FormulaToken::OperatorLeftPar, FormulaToken::OperatorMul, FormulaToken::OperatorRightPar, and FormulaToken::OperatorSub.

opPrecedence()

int opPrecedence

(

FormulaToken::Operator

op

)

Definition at line 725 of file EnhancedPathFormula.cpp.

{
    int prec = -1;
    switch (op) {
    case FormulaToken::OperatorMul: prec = 5; break;
    case FormulaToken::OperatorDiv: prec = 6; break;
    case FormulaToken::OperatorAdd: prec = 3; break;
    case FormulaToken::OperatorSub: prec = 3; break;
    case FormulaToken::OperatorComma: prec = 0; break;
    case FormulaToken::OperatorRightPar: prec = 0; break;
    case FormulaToken::OperatorLeftPar: prec = -1; break;
    default: prec = -1; break;
    }
    return prec;
}

References FormulaToken::OperatorAdd, FormulaToken::OperatorComma, FormulaToken::OperatorDiv, FormulaToken::OperatorLeftPar, FormulaToken::OperatorMul, FormulaToken::OperatorRightPar, and FormulaToken::OperatorSub.