oofem::Parser Class Reference

Class for evaluating mathematical expressions in strings. More...

#include <parser.h>

Collaboration diagram for oofem::Parser:

Classes
struct	name

Public Member Functions
	Parser ()
	~Parser ()
double	eval (const char *string, int &err)
void	reset ()

Private Types
enum	Token_value {   NAME, NUMBER, END, SQRT_FUNC,   SIN_FUNC, COS_FUNC, TAN_FUNC, ATAN_FUNC,   ASIN_FUNC, ACOS_FUNC, EXP_FUNC, HEAVISIDE_FUNC,   PLUS ='+', MINUS ='-', MUL ='*', DIV ='/',   POW ='^', BOOL_EQ, BOOL_LE, BOOL_LT,   BOOL_GE, BOOL_GT, PRINT =';', ASSIGN ='=',   LP ='(', RP =')' }

Private Member Functions
name *	look (const char *p, int ins=0)
name *	insert (const char *s)
void	error (const char *s)
double	expr (bool get)
double	term (bool get)
double	prim (bool get)
double	agr (bool get)
Token_value	get_token ()

Private Attributes
int	no_of_errors
Token_value	curr_tok
name *	table [Parser_TBLSZ]
double	number_value
char	string_value [Parser_CMD_LENGTH]
const char *	parsedLine

Detailed Description

Class for evaluating mathematical expressions in strings.

Strings should be in MATLAB syntax. The parser understands variable names with values set by "x=expression;" The following binary operators are recognized: < > == + - * / and the following functions: sqrt, sin, cos, tan, atan, asin, acos, exp, as well as parentheses ( )

Example string: x=3;y=7;sqrt(x*(x/y+3))

Definition at line 54 of file parser.h.

Member Enumeration Documentation

enum oofem::Parser::Token_value

private

Enumerator
NAME
NUMBER
END
SQRT_FUNC
SIN_FUNC
COS_FUNC
TAN_FUNC
ATAN_FUNC
ASIN_FUNC
ACOS_FUNC
EXP_FUNC
HEAVISIDE_FUNC
PLUS
MINUS
MUL
DIV
POW
BOOL_EQ
BOOL_LE
BOOL_LT
BOOL_GE
BOOL_GT
PRINT
ASSIGN
LP
RP

Definition at line 72 of file parser.h.

Constructor & Destructor Documentation

oofem::Parser::Parser ( )

inline

Definition at line 57 of file parser.h.

References Parser_TBLSZ.

oofem::Parser::~Parser ( )

inline

Definition at line 64 of file parser.h.

Member Function Documentation

double oofem::Parser::agr ( bool  get )

private

Definition at line 203 of file parser.C.

References curr_tok, expr(), get_token(), LP, OOFEM_ERROR, and RP.

Referenced by prim().

void oofem::Parser::error ( const char *  s )

private

double oofem::Parser::eval	(	const char *	string,
		int &	err
	)

Definition at line 378 of file parser.C.

References curr_tok, END, expr(), no_of_errors, and parsedLine.

Referenced by oofem::UserDefinedTemperatureField::computeValueAt(), oofem::ScalarFunction::eval(), oofem::CalculatorFunction::evaluate(), oofem::CalculatorFunction::evaluateAccelerationAtTime(), oofem::CalculatorFunction::evaluateAtTime(), and oofem::CalculatorFunction::evaluateVelocityAtTime().

double oofem::Parser::expr ( bool  get )

private

Definition at line 44 of file parser.C.

References curr_tok, MINUS, PLUS, and term().

Referenced by agr(), eval(), and prim().

Parser::Token_value oofem::Parser::get_token ( )

private

Definition at line 228 of file parser.C.

References ACOS_FUNC, ASIN_FUNC, ASSIGN, ATAN_FUNC, BOOL_EQ, BOOL_GE, BOOL_GT, BOOL_LE, BOOL_LT, COS_FUNC, curr_tok, END, EXP_FUNC, HEAVISIDE_FUNC, M_PI, NAME, NUMBER, number_value, OOFEM_ERROR, parsedLine, Parser_CMD_LENGTH, PRINT, SIN_FUNC, SQRT_FUNC, string_value, and TAN_FUNC.

Referenced by agr(), and prim().

name* oofem::Parser::insert ( const char *  s )

inlineprivate

Definition at line 92 of file parser.h.

Referenced by prim().

Parser::name * oofem::Parser::look ( const char *  p, int  ins = 0  )

private

Definition at line 344 of file parser.C.

References oofem::Parser::name::next, OOFEM_ERROR, Parser_TBLSZ, oofem::Parser::name::string, table, and oofem::Parser::name::value.

Referenced by prim().

double oofem::Parser::prim ( bool  get )

private

Definition at line 109 of file parser.C.

References ACOS_FUNC, agr(), ASIN_FUNC, ASSIGN, ATAN_FUNC, COS_FUNC, curr_tok, EXP_FUNC, expr(), get_token(), HEAVISIDE_FUNC, insert(), look(), LP, MINUS, NAME, NUMBER, number_value, OOFEM_ERROR, RP, SIN_FUNC, SQRT_FUNC, string_value, TAN_FUNC, and oofem::Parser::name::value.

Referenced by term().

void oofem::Parser::reset

(

)

Definition at line 391 of file parser.C.

References oofem::Parser::name::next, Parser_TBLSZ, oofem::Parser::name::string, and table.

double oofem::Parser::term ( bool  get )

private

Definition at line 68 of file parser.C.

References BOOL_EQ, BOOL_GE, BOOL_GT, BOOL_LE, BOOL_LT, curr_tok, DIV, MUL, OOFEM_ERROR, POW, and prim().

Referenced by expr().

Member Data Documentation

Token_value oofem::Parser::curr_tok

private

Definition at line 80 of file parser.h.

Referenced by agr(), eval(), expr(), get_token(), prim(), and term().

int oofem::Parser::no_of_errors

private

Definition at line 79 of file parser.h.

Referenced by eval().

double oofem::Parser::number_value

private

Definition at line 87 of file parser.h.

Referenced by get_token(), and prim().

const char* oofem::Parser::parsedLine

private

Definition at line 89 of file parser.h.

Referenced by eval(), and get_token().

char oofem::Parser::string_value[Parser_CMD_LENGTH]

private

Definition at line 88 of file parser.h.

Referenced by get_token(), and prim().

name* oofem::Parser::table[Parser_TBLSZ]

private

Definition at line 86 of file parser.h.

Referenced by look(), and reset().

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

• parser.h
• parser.C