iicm.vrml.pw
Class StrTokenizer

java.lang.Object
  iicm.vrml.pw.StrTokenizer

public class StrTokenizer
extends java.lang.Object

StrTokenizer - read VRML stream tokens Copyright (c) 1997 IICM

Version:

1.0.2, latest change: 18 Feb 97

Author:

Michael Pichler

Field Summary

private byte[]	backbuf_
private int	backoffs_
private int	buffered_
private int	c_
private CharArray	commentBuffer
private java.io.InputStream	in_
private int	lineno_
private int	optsize

Constructor Summary

StrTokenizer(java.io.InputStream is)
construct a StrTokenizer for an InputStream.

Method Summary

boolean	eof() return flag whether end of file was reached
private int	getChar() get next character from stream or backbuffer (internal)
int	lineno() current line number
int	nextChar() look at next character without reading a new one.
(package private) java.lang.String	OutputComment() OutputComment outputs the commen.
void	putbackString(java.lang.String s) put back a String.
int	readChar() read a character (skips whitespace and comments)
double	readFloatValue() read a floating point number. format: [+-][0-9]*{[.][0-9]*}{[Ee][+-][0-9]*}
java.lang.String	readIdentifier() read an identifier String (skips whitespace and comments)
int	readIntValue() read an integer. format: [+-][0-9]* or [+-]0x[0-9A-Fa-f]*
int	readLine(char[] buf) read a whole line (until \r or \n) into a char[] buffer.
java.lang.String	readQuotedString() read a quoted String ("...").
void	skipComment() skip any amount of whitespace - handle any comment.
(package private) boolean	skipCommentReturn(boolean arg) call skipComment and return the argument.

Methods inherited from class java.lang.Object

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

Field Detail

in_

private java.io.InputStream in_

optsize

private final int optsize

See Also:

Constant Field Values

backbuf_

private byte[] backbuf_

buffered_

private int buffered_

backoffs_

private int backoffs_

c_

private int c_

lineno_

private int lineno_

commentBuffer

private CharArray commentBuffer

Constructor Detail

StrTokenizer

public StrTokenizer(java.io.InputStream is)

construct a StrTokenizer for an InputStream. StrTokenizer does buffering on the input stream. current implementation blocks to read first character from stream

Method Detail

eof

public boolean eof()

return flag whether end of file was reached

lineno

public int lineno()

current line number

nextChar

public int nextChar()

look at next character without reading a new one. returns -1 on eof

See Also:

skipComment()

getChar

private final int getChar()
                   throws java.io.IOException

get next character from stream or backbuffer (internal)

Throws:

java.io.IOException

skipComment

public void skipComment()
                 throws java.io.IOException

skip any amount of whitespace - handle any comment. called by all read operations

Throws:

java.io.IOException

OutputComment

java.lang.String OutputComment()
                         throws java.io.IOException

OutputComment outputs the commen. Invoke between nodes and not inside field attributes.

Throws:

java.io.IOException

skipCommentReturn

boolean skipCommentReturn(boolean arg)
                    throws java.io.IOException

call skipComment and return the argument. java has no comma operator for loop conditions

Throws:

java.io.IOException

readLine

public int readLine(char[] buf)
             throws java.io.IOException

read a whole line (until \r or \n) into a char[] buffer. if the line is longer than the buffer, the rest is skipped. the newline character is not appended to the buffer

Returns:

the no. of chars written into buf

Throws:

java.io.IOException

readChar

public int readChar()
             throws java.io.IOException

read a character (skips whitespace and comments)

Returns:

character or -1 on EOF

Throws:

java.io.IOException

readIdentifier

public java.lang.String readIdentifier()
                                throws java.io.IOException

read an identifier String (skips whitespace and comments)

Returns:

null if no identifier could be read or non-zero length identifier string

Throws:

java.io.IOException

readQuotedString

public java.lang.String readQuotedString()
                                  throws java.io.IOException

read a quoted String ("..."). the quotes themselves are not part of the String returned. returns empty string if next char is not '"'

Throws:

java.io.IOException

readIntValue

public int readIntValue()
                 throws java.io.IOException

read an integer. format: [+-][0-9]* or [+-]0x[0-9A-Fa-f]*

Throws:

java.io.IOException

readFloatValue

public double readFloatValue()
                      throws java.io.IOException

read a floating point number. format: [+-][0-9]*{[.][0-9]*}{[Ee][+-][0-9]*}

Throws:

java.io.IOException

putbackString

public void putbackString(java.lang.String s)

put back a String. In order to not further slow down reading of numbers, their string representation is not remembered by this class