xbExpn Class Reference

xbExpn class More...

#include <xbexp.h>

List of all members.

Public Member Functions
	xbExpn (xbXBase *)
	xbExpn Constructor
virtual	~xbExpn ()
	xbExpn Destructor
xbShort	GetNextToken (const char *s, xbShort MaxLen)
	GetNextToken.
xbShort	ProcessExpression (xbExpNode *n, xbShort)
	Short description.
xbShort	ProcessExpression (xbShort opt)
xbExpNode *	GetTree ()
void	SetTreeToNull ()
xbExpNode *	GetFirstTreeNode (xbExpNode *)
	Short description.
xbExpNode *	GetFirstTreeNode ()
xbShort	ProcessExpression (const char *exp, xbDbf *d)
	ProcessExpression.
xbShort	ParseExpression (const char *exp, xbDbf *d)
	ParseExpression.
xbExpNode *	GetExpressionHandle ()
	GetExpressionHandle.
char	GetExpressionResultType (xbExpNode *)
	GetExpressionResultType.
char	GetExpressionResultType ()
char *	GetCharResult ()
xbString &	GetStringResult ()
	Short description.
xbDouble	GetDoubleResult ()
	Short description.
xbLong	GetIntResult ()
	Short description.
xbShort	ProcessExpression (xbExpNode *)
	Short description.
xbShort	ProcessExpression ()
xbShort	BuildExpressionTree (const char *Expression, xbShort MaxTokenLen, xbDbf *d)
	BuildExpressionTree.
void	InitStack ()
	Destructor.
xbExpNode *	Pop ()
	Pop the top value from the stack.
xbShort	Push (xbExpNode *)
	Push a value onto the stack.
xbShort	GetStackDepth ()
void	DumpStack ()
	Short description.
const char *	GetValidFuncName (xbShort funcNo)
void	DumpExpressionTree (xbShort printOption)
void	DumpExpressionTree (xbExpNode *, xbShort printOption)
	DumpExpressionTree.
void	DumpExpNode (xbExpNode *, xbShort printOption)
	DumpExpNode.
xbDouble	ABS (xbDouble)
	Short description.
xbLong	ASC (const char *)
	Short description.
xbLong	AT (const char *, const char *)
	Short description.
char *	CDOW (const char *)
	Short description.
char *	CHR (xbLong)
	Short description.
char *	CMONTH (const char *)
	Short description.
char *	CTOD (const char *)
	Short description.
char *	DATE ()
	Short description.
xbLong	DAY (const char *)
	Short description.
char *	DESCEND (const char *)
	Short description.
xbLong	DESCEND (const xbDate &)
	Short description.
xbDouble	DESCEND (xbDouble)
	Short description.
xbLong	DOW (const char *)
	Short description.
char *	DTOC (const char *)
	Short description.
char *	DTOS (const char *)
	Short description.
xbDouble	EXP (xbDouble)
	Short description.
char *	IIF (xbShort, const char *, const char *)
	Short description.
xbLong	INT (xbDouble)
	Short description.
xbLong	ISALPHA (const char *)
	Short description.
xbLong	ISLOWER (const char *)
	Short description.
xbLong	ISUPPER (const char *)
	Short description.
char *	LEFT (const char *, xbShort)
	Short description.
xbLong	LEN (const char *)
	Short description.
xbDouble	LOG (xbDouble)
	Short description.
char *	LOWER (const char *)
	Short description.
char *	LTRIM (const char *)
	Short description.
xbDouble	MAX (xbDouble, xbDouble)
	Short description.
xbLong	MONTH (const char *)
	Short description.
xbDouble	MIN (xbDouble, xbDouble)
	Short description.
xbLong	RECNO (xbDbf *)
	Short description.
char *	REPLICATE (const char *, xbShort)
	Short description.
char *	RIGHT (const char *, xbShort)
	Short description.
char *	RTRIM (const char *)
	Short description.
char *	SPACE (xbShort)
	Short description.
xbDouble	SQRT (xbDouble)
	Short description.
char *	STR (const char *)
	Short description.
char *	STR (const char *, xbShort)
	Short description.
char *	STR (const char *, xbShort, xbShort)
	Short description.
char *	STR (xbDouble)
	Short description.
char *	STR (xbDouble, xbShort)
	Short description.
char *	STR (xbDouble, xbUShort length, xbShort numDecimals)
	Short description.
char *	STRZERO (const char *)
	Short description.
char *	STRZERO (const char *, xbShort)
	Short description.
char *	STRZERO (const char *, xbShort, xbShort)
	Short description.
char *	STRZERO (xbDouble)
	Short description.
char *	STRZERO (xbDouble, xbShort)
	Short description.
char *	STRZERO (xbDouble, xbShort, xbShort)
	Short description.
char *	SUBSTR (const char *, xbShort, xbShort)
	Short description.
char *	TRIM (const char *)
	Short description.
char *	UPPER (const char *)
	Short description.
xbLong	VAL (const char *)
	Short description.
xbLong	YEAR (const char *)
	Short description.
Protected Member Functions
xbShort	IsWhiteSpace (char)
	IsWhiteSpace.
char	IsSeparator (char)
	IsSeparator.
xbExpNode *	LoadExpNode (const char *ENodeText, const char EType, const xbShort ELen, const xbShort BufLen)
	GetExpNode.
xbShort	OperatorWeight (const char *Oper, xbShort len)
	OperatorWeight.
xbShort	ReduceComplexExpression (const char *NextToken, xbShort Len, xbExpNode *cn, xbDbf *d)
	ReduceComplexExpression.
xbShort	GetFunctionTokenLen (const char *s)
	GetFunctionTokenLen.
xbShort	ReduceFunction (const char *NextToken, xbExpNode *cn, xbDbf *d)
	ReduceFunction.
xbExpNode *	GetNextTreeNode (xbExpNode *)
	Short description.
xbShort	ProcessOperator (xbShort)
	Short description.
xbShort	ProcessFunction (char *)
	Short description.
xbShort	ValidOperation (char *, char, char)
	Short description.
char	GetOperandType (xbExpNode *)
	Short description.
xbShort	AlphaOperation (char *)
	Short description.
xbShort	NumericOperation (char *)
	Short description.
xbShort	GetFuncInfo (const char *Function, xbShort Option)
	Get information on a function.
xbDouble	GetDoub (xbExpNode *)
	Short description.
xbLong	GetInt (xbExpNode *)
	Short description.

---

Detailed Description

xbExpn class

This class is used for processing expressions

---

Constructor & Destructor Documentation

xbExpn::xbExpn

(

xbXBase *

x

)

xbExpn Constructor

xbExpn::~xbExpn

(

)

[virtual]

xbExpn Destructor

---

Member Function Documentation

xbDouble xbExpn::ABS

(

xbDouble

d

)

Short description.

Parameters:

d

xbShort xbExpn::AlphaOperation

(

char *

Operator

)

[protected]

Short description.

Parameters:

Operator

xbLong xbExpn::ASC

(

const char *

String

)

Short description.

Parameters:

String

xbLong xbExpn::AT	(	const char *	s1,
		const char *	s2
	)

Short description.

Parameters:

	s1
	s2

xbShort xbExpn::BuildExpressionTree	(	const char *	Expression,
		xbShort	MaxTokenLen,
		xbDbf *	d
	)

BuildExpressionTree.

char * xbExpn::CDOW

(

const char *

Date8

)

Short description.

Parameters:

Date8

char * xbExpn::CHR

(

xbLong

l

)

Short description.

Parameters:

l

char * xbExpn::CMONTH

(

const char *

Date8

)

Short description.

Parameters:

Date8

char * xbExpn::CTOD

(

const char *

indate

)

Short description.

Parameters:

indate

char * xbExpn::DATE

(

)

Short description.

xbLong xbExpn::DAY

(

const char *

Date8

)

Short description.

Parameters:

Date8

xbDouble xbExpn::DESCEND

(

xbDouble

d

)

Short description.

Parameters:

num

xbLong xbExpn::DESCEND

(

const xbDate &

date

)

Short description.

Parameters:

date

char * xbExpn::DESCEND

(

const char *

str

)

Short description.

Parameters:

str

xbLong xbExpn::DOW

(

const char *

Date8

)

Short description.

Parameters:

Date8

char * xbExpn::DTOC

(

const char *

Date8

)

Short description.

Parameters:

Date8

char * xbExpn::DTOS

(

const char *

Date8

)

Short description.

Parameters:

Date8

void xbExpn::DumpExpNode	(	xbExpNode *	e,
		xbShort	printOption
	)

DumpExpNode.

void xbExpn::DumpExpressionTree	(	xbExpNode *	E,
		xbShort	printOption
	)

DumpExpressionTree.

void xbExpn::DumpExpressionTree

(

xbShort

printOption

)

[inline]

void xbExpn::DumpStack

(

)

Short description.

xbDouble xbExpn::EXP

(

xbDouble

d

)

Short description.

Parameters:

d

char* xbExpn::GetCharResult

(

)

xbDouble xbExpn::GetDoub

(

xbExpNode *

p

)

[protected]

Short description.

Parameters:

p

xbDouble xbExpn::GetDoubleResult

(

)

Short description.

xbExpNode * xbExpn::GetExpressionHandle

(

)

GetExpressionHandle.

char xbExpn::GetExpressionResultType

(

)

[inline]

char xbExpn::GetExpressionResultType

(

xbExpNode *

e

)

GetExpressionResultType.

xbExpNode* xbExpn::GetFirstTreeNode

(

)

[inline]

xbExpNode * xbExpn::GetFirstTreeNode

(

xbExpNode *

e

)

Short description.

Parameters:

e

xbShort xbExpn::GetFuncInfo	(	const char *	Function,
		xbShort	Option
	)			[protected]

Get information on a function.

Returns the information specifed (Option) for the specified function.

Parameters:

	Function	name of function to get information about
	Option	One of the following: Option Description 1 Return minimum number of parms 2 Return function result type ? Return 0 if valid function

Returns:

requested information or -1 on failure.

xbShort xbExpn::GetFunctionTokenLen

(

const char *

s

)

[protected]

GetFunctionTokenLen.

xbLong xbExpn::GetInt

(

xbExpNode *

p

)

[protected]

Short description.

Parameters:

p

xbLong xbExpn::GetIntResult

(

)

Short description.

xbShort xbExpn::GetNextToken	(	const char *	s,
		xbShort	MaxLen
	)

GetNextToken.

xbExpNode * xbExpn::GetNextTreeNode

(

xbExpNode *

e

)

[protected]

Short description.

Parameters:

e

char xbExpn::GetOperandType

(

xbExpNode *

e

)

[protected]

Short description.

Parameters:

e

xbShort xbExpn::GetStackDepth

(

)

[inline]

xbString & xbExpn::GetStringResult

(

)

Short description.

xbExpNode* xbExpn::GetTree

(

)

[inline]

const char* xbExpn::GetValidFuncName

(

xbShort

funcNo

)

[inline]

char * xbExpn::IIF	(	xbShort	ifCondition,
		const char *	trueRslt,
		const char *	falseRslt
	)

Short description.

Parameters:

	ifCondition
	trueRslt
	falseRslt

void xbExpn::InitStack

(

)

Destructor.

Short description.

xbLong xbExpn::INT

(

xbDouble

d

)

Short description.

Parameters:

d

xbLong xbExpn::ISALPHA

(

const char *

String

)

Short description.

Parameters:

String

xbLong xbExpn::ISLOWER

(

const char *

String

)

Short description.

Parameters:

String

char xbExpn::IsSeparator

(

char

c

)

[protected]

IsSeparator.

xbLong xbExpn::ISUPPER

(

const char *

String

)

Short description.

Parameters:

String

xbShort xbExpn::IsWhiteSpace

(

char

c

)

[protected]

IsWhiteSpace.

char * xbExpn::LEFT	(	const char *	String,
		xbShort	Len
	)

Short description.

Parameters:

	String
	Len

xbLong xbExpn::LEN

(

const char *

String

)

Short description.

Parameters:

String

xbExpNode * xbExpn::LoadExpNode	(	const char *	ENodeText,
		const char	EType,
		const xbShort	ELen,
		const xbShort	BufLen
	)			[protected]

GetExpNode.

LoadExpNode

xbDouble xbExpn::LOG

(

xbDouble

d

)

Short description.

Parameters:

d

char * xbExpn::LOWER

(

const char *

String

)

Short description.

Parameters:

String

char * xbExpn::LTRIM

(

const char *

String

)

Short description.

Parameters:

String

xbDouble xbExpn::MAX	(	xbDouble	d1,
		xbDouble	d2
	)

Short description.

Parameters:

	d1
	d2

xbDouble xbExpn::MIN	(	xbDouble	d1,
		xbDouble	d2
	)

Short description.

Parameters:

	d1
	d2

xbLong xbExpn::MONTH

(

const char *

Date8

)

Short description.

Parameters:

Date8

xbShort xbExpn::NumericOperation

(

char *

Operator

)

[protected]

Short description.

Parameters:

Operator

xbShort xbExpn::OperatorWeight	(	const char *	Oper,
		xbShort	len
	)			[protected]

OperatorWeight.

This function determines the priority of an operator

xbShort xbExpn::ParseExpression	(	const char *	exp,
		xbDbf *	d
	)

ParseExpression.

xbExpNode * xbExpn::Pop

(

)

Pop the top value from the stack.

xbShort xbExpn::ProcessExpression

(

)

[inline]

xbShort xbExpn::ProcessExpression

(

xbExpNode *

e

)

Short description.

Parameters:

e

xbShort xbExpn::ProcessExpression	(	const char *	exp,
		xbDbf *	d
	)

ProcessExpression.

xbShort xbExpn::ProcessExpression

(

xbShort

opt

)

[inline]

xbShort xbExpn::ProcessExpression	(	xbExpNode *	Wtree,
		xbShort	RecBufSw
	)

Short description.

Parameters:

	Wtree
	RecBufSw

xbShort xbExpn::ProcessFunction

(

char *

Func

)

[protected]

Short description.

Parameters:

Func

xbShort xbExpn::ProcessOperator

(

xbShort

RecBufSw

)

[protected]

Short description.

Parameters:

RecBufSw

xbShort xbExpn::Push

(

xbExpNode *

p

)

Push a value onto the stack.

Parameters:

p

xbLong xbExpn::RECNO

(

xbDbf *

d

)

Short description.

Parameters:

d

xbShort xbExpn::ReduceComplexExpression	(	const char *	NextToken,
		xbShort	Len,
		xbExpNode *	cn,
		xbDbf *	d
	)			[protected]

ReduceComplexExpression.

xbShort xbExpn::ReduceFunction	(	const char *	NextToken,
		xbExpNode *	cn,
		xbDbf *	d
	)			[protected]

ReduceFunction.

char * xbExpn::REPLICATE	(	const char *	String,
		xbShort	Cnt
	)

Short description.

Parameters:

	String
	Cnt

char * xbExpn::RIGHT	(	const char *	String,
		xbShort	cnt
	)

Short description.

Parameters:

String

cnt

char * xbExpn::RTRIM

(

const char *

String

)

Short description.

Parameters:

String

void xbExpn::SetTreeToNull

(

)

[inline]

char * xbExpn::SPACE

(

xbShort

Cnt

)

Short description.

Parameters:

Cnt

xbDouble xbExpn::SQRT

(

xbDouble

d

)

Short description.

Parameters:

d

char * xbExpn::STR	(	xbDouble	d,
		xbUShort	length,
		xbShort	numDecimals
	)

Short description.

Parameters:

	d
	length
	numDecimals

char * xbExpn::STR	(	xbDouble	d,
		xbShort	length
	)

Short description.

Parameters:

	d
	length

char * xbExpn::STR

(

xbDouble

d

)

Short description.

Parameters:

d

char * xbExpn::STR	(	const char *	String,
		xbShort	length,
		xbShort	dec
	)

Short description.

Parameters:

	String
	length

char * xbExpn::STR	(	const char *	String,
		xbShort	length
	)

Short description.

Parameters:

	String
	length

char * xbExpn::STR

(

const char *

String

)

Short description.

Parameters:

String

char * xbExpn::STRZERO	(	xbDouble	d,
		xbShort	length,
		xbShort
	)

Short description.

Parameters:

	d
	length

char * xbExpn::STRZERO	(	xbDouble	d,
		xbShort	length
	)

Short description.

Parameters:

	d
	length

char * xbExpn::STRZERO

(

xbDouble

d

)

Short description.

Parameters:

d

char * xbExpn::STRZERO	(	const char *	String,
		xbShort	length,
		xbShort
	)

Short description.

Parameters:

	String
	length

char * xbExpn::STRZERO	(	const char *	String,
		xbShort	length
	)

Short description.

Parameters:

	String
	length

char * xbExpn::STRZERO

(

const char *

String

)

Short description.

Parameters:

String

char * xbExpn::SUBSTR	(	const char *	String,
		xbShort	StartPos,
		xbShort	Len
	)

Short description.

Parameters:

	String
	StartPos
	Len

char * xbExpn::TRIM

(

const char *

String

)

Short description.

Parameters:

String

char * xbExpn::UPPER

(

const char *

String

)

Short description.

Parameters:

String

xbLong xbExpn::VAL

(

const char *

String

)

Short description.

Parameters:

String

xbShort xbExpn::ValidOperation	(	char *	Operand,
		char	Op1,
		char	Op2
	)			[protected]

Short description.

Parameters:

	Operand
	Op1	Op2

xbLong xbExpn::YEAR

(

const char *

Date8

)

Short description.

Parameters:

Date8

---

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

• xbexp.h
• xbexp.cpp
• xbexpfnc.cpp
• xbexpprc.cpp