JFlex

Class PackEmitter

java.lang.Object

JFlex.PackEmitter

Direct Known Subclasses:

CountEmitter, HiLowEmitter

public abstract class PackEmitter
extends java.lang.Object

Encodes int arrays as strings. Also splits up strings when longer than 64K in UTF8 encoding. Subclasses emit unpacking code. Usage protocol: p.emitInit();
for each data: p.emitData(data);
p.emitUnpack();

Field Summary

Fields

Modifier and Type	Field and Description
protected int	chunks number of existing string chunks
protected java.lang.String	name name of the generated array (mixed case, no yy prefix)
protected java.lang.StringBuffer	out output buffer

Constructor Summary

Constructors

Constructor and Description
PackEmitter(java.lang.String name) Create new emitter for an array.

Method Summary

Methods

Modifier and Type	Method and Description
void	breaks() Execute line/chunk break if necessary.
protected java.lang.String	constName() Convert array name into all uppercase internal scanner constant name.
void	emitInit() Emit declaration of decoded member and open first chunk.
void	emitUC(int i) Emit single unicode character.
abstract void	emitUnpack() Emit the unpacking code.
protected void	nl() emit newline
protected void	println(java.lang.String s)
java.lang.String	toString() Return current output buffer.

Methods inherited from class java.lang.Object

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

Field Detail

name

protected java.lang.String name

name of the generated array (mixed case, no yy prefix)

out

protected java.lang.StringBuffer out

output buffer

chunks

protected int chunks

number of existing string chunks

Constructor Detail

PackEmitter

public PackEmitter(java.lang.String name)

Create new emitter for an array.

Parameters:

name - the name of the generated array

Method Detail

constName

protected java.lang.String constName()

Convert array name into all uppercase internal scanner constant name.

Returns:

name as a internal constant name.

See Also:

name

toString

public java.lang.String toString()

Return current output buffer.

Overrides:

toString in class java.lang.Object

emitInit

public void emitInit()

Emit declaration of decoded member and open first chunk.

emitUC

public void emitUC(int i)

Emit single unicode character. Updates length, position, etc.

Parameters:

i - the character to emit.

breaks

public void breaks()

Execute line/chunk break if necessary. Leave space for at least two chars.

emitUnpack

public abstract void emitUnpack()

Emit the unpacking code.

nl

protected void nl()

emit newline

println

protected void println(java.lang.String s)