Math::ExpressionParser Class Reference

Parses a string with a mathematical expression. More...

Protected Member Functions
Expression *	parse (const char *) const
bool	findOuterParens (char *, int, Expression *&) const
bool	findOuterAbs (char *, int, Expression *&) const
bool	findQMarkOper (char *, int, Expression *&) const
bool	findAndOrOr (char *, int, Expression *&) const
bool	findInequality (char *, int, Expression *&) const
bool	findPlusAndMinus (char *, int, Expression *&) const
bool	findOtherOper (BufferString &, int, Expression *&) const
bool	findVariable (char *, int, Expression *&) const
bool	findMathFunction (BufferString &, int, Expression *&) const
bool	findStatsFunction (BufferString &, int, Expression *&) const

Protected Attributes
BufferString	inp_
const bool	inputsareseries_
uiString	errmsg_
bool	abswarn_

Private Member Functions
	mODTextTranslationClass (ExpressionParser) public
void	setInput (const char *s)
Expression *	parse () const
const uiString	errMsg () const
bool	foundOldAbs () const
uiString	sParse2ArgStr () const

Static Private Member Functions
static BufferString	varNameOf (const char *fullvarnm, int *shift=0)
static Expression::VarType	varTypeOf (const char *)
static int	constIdxOf (const char *)

Detailed Description

Parses a string with a mathematical expression.

The expression can consist of constants, variables, operators and standard mathematical functions. A constant can be any number like 3, -5, 3e-5, or pi. Everything that does not start with a digit and is not an operator is treated as a variable. An operator can be either:

+, -, *, /, ^, >, <, <=, >=, ==, !=, &&, ||, cond ? true stat : false stat, or |abs|

A mathematical function can be either:

sin(), cos(), tan(), ln(), log(), exp() or sqrt ().

If the parser returns null, it couldn't parse the expression. Then, errmsg_ should contain info.

Member Function Documentation

static int Math::ExpressionParser::constIdxOf ( const char *  )

staticprivate

const uiString Math::ExpressionParser::errMsg ( ) const

inlineprivate

bool Math::ExpressionParser::findAndOrOr ( char *  , int  , Expression *&    ) const

protected

bool Math::ExpressionParser::findInequality ( char *  , int  , Expression *&    ) const

protected

bool Math::ExpressionParser::findMathFunction ( BufferString &  , int  , Expression *&    ) const

protected

bool Math::ExpressionParser::findOtherOper ( BufferString &  , int  , Expression *&    ) const

protected

bool Math::ExpressionParser::findOuterAbs ( char *  , int  , Expression *&    ) const

protected

bool Math::ExpressionParser::findOuterParens ( char *  , int  , Expression *&    ) const

protected

bool Math::ExpressionParser::findPlusAndMinus ( char *  , int  , Expression *&    ) const

protected

bool Math::ExpressionParser::findQMarkOper ( char *  , int  , Expression *&    ) const

protected

bool Math::ExpressionParser::findStatsFunction ( BufferString &  , int  , Expression *&    ) const

protected

bool Math::ExpressionParser::findVariable ( char *  , int  , Expression *&    ) const

protected

bool Math::ExpressionParser::foundOldAbs ( ) const

inlineprivate

Math::ExpressionParser::mODTextTranslationClass ( ExpressionParser  )

inlineprivate

Expression* Math::ExpressionParser::parse ( ) const

private

Expression* Math::ExpressionParser::parse ( const char *  ) const

protected

void Math::ExpressionParser::setInput ( const char *  s )

inlineprivate

uiString Math::ExpressionParser::sParse2ArgStr ( ) const

inlineprivate

static BufferString Math::ExpressionParser::varNameOf ( const char *  fullvarnm, int *  shift = 0  )

staticprivate

static Expression::VarType Math::ExpressionParser::varTypeOf ( const char *  )

staticprivate

Member Data Documentation

bool Math::ExpressionParser::abswarn_

mutableprotected

uiString Math::ExpressionParser::errmsg_

mutableprotected

BufferString Math::ExpressionParser::inp_

protected

const bool Math::ExpressionParser::inputsareseries_

protected