at.dms.compiler.tools.antlr.runtime
Class ByteBuffer

java.lang.Object
  at.dms.compiler.tools.antlr.runtime.InputBuffer
      at.dms.compiler.tools.antlr.runtime.ByteBuffer

public class ByteBuffer
extends InputBuffer

A Stream of characters fed to the lexer from a InputStream that can be rewound via mark()/rewind() methods.

A dynamic array is used to buffer up all the input characters. Normally, "k" characters are stored in the buffer. More characters may be stored during guess mode (testing syntactic predicate), or when LT(i>k) is referenced. Consumption of characters is deferred. In other words, reading the next character is not done by conume(), but deferred until needed by LA or LT.

See Also:

CharQueue

Field Summary

Fields inherited from class at.dms.compiler.tools.antlr.runtime.InputBuffer

markerOffset, nMarkers, numToConsume, queue

Constructor Summary

ByteBuffer(InputStream input)
Create a character buffer

Method Summary

void	fill(int amount) Ensure that the character buffer is sufficiently full

Methods inherited from class at.dms.compiler.tools.antlr.runtime.InputBuffer

commit, consume, getLAChars, getMarkedChars, isMarked, LA, mark, rewind, syncConsume

Methods inherited from class java.lang.Object

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

Constructor Detail

ByteBuffer

public ByteBuffer(InputStream input)

Create a character buffer

Method Detail

fill

public void fill(int amount)
          throws CharStreamException

Ensure that the character buffer is sufficiently full

Specified by:

fill in class InputBuffer

Throws:

CharStreamException