org.openmali.number
Class Parser

java.lang.Object
  org.openmali.number.Parser

public class Parser
extends java.lang.Object

A hand written top down parser for Rational, Radicand1 and Matrix4 classes

Constructor Summary

Parser(java.io.Reader in)

Method Summary

float	floatNum() A floating point number of the form {+,-}?
void	fraction() FRACTION <= INTEGER { '/' NATURAL}?
java.io.StreamTokenizer	getTokenizer()
int	integer() INTEGER <- {+|-}?
Matrix4rad	matrix4rad() Reads a 4x4 radical matrix from the tokenizer [ [radicand x 4] x4]
int	natural() A posative integer (no signs infront of digits)
Radical1	radicand1() RADICAND1 <- RADICAND1_TERM {"+" RADICAND1_TERM}*
void	radicand1Term() RADICAND1_TERM <- RATIONAL {"*" RADICAND} | RADICAND
Rational	rational() RATIONAL <- FRACTION || ( INTEGER +?

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Parser

public Parser(java.io.Reader in)

Method Detail

getTokenizer

public java.io.StreamTokenizer getTokenizer()

matrix4rad

public Matrix4rad matrix4rad()
                      throws java.io.IOException

Reads a 4x4 radical matrix from the tokenizer [ [radicand x 4] x4]

Returns:

the read matrix

Throws:

java.io.IOException

radicand1

public Radical1 radicand1()
                   throws java.io.IOException

RADICAND1 <- RADICAND1_TERM {"+" RADICAND1_TERM}*

Returns:

the radical

Throws:

java.io.IOException

radicand1Term

public void radicand1Term()
                   throws java.io.IOException

RADICAND1_TERM <- RATIONAL {"*" RADICAND} | RADICAND

Throws:

java.io.IOException

rational

public Rational rational()
                  throws java.io.IOException

RATIONAL <- FRACTION || ( INTEGER +? FRACTION ) ||

Throws:

java.io.IOException

fraction

public void fraction()
              throws java.io.IOException

FRACTION <= INTEGER { '/' NATURAL}?

Throws:

java.io.IOException

integer

public int integer()
            throws java.io.IOException

INTEGER <- {+|-}? natural

Throws:

java.io.IOException

natural

public int natural()
            throws java.io.IOException

A posative integer (no signs infront of digits)

Throws:

java.io.IOException

floatNum

public float floatNum()
               throws java.io.IOException

A floating point number of the form {+,-}? (dddddddd)?.(dddddd)? {E {+,-}? NATURAL}? (no dangling f like in java

Returns:

the float

Throws:

java.io.IOException