#
# This file is encoded in (so called) SHIFT-JIS,
# line delimitor is CR.
#
Bit Field
Goodies for Squeak 1.31, Squeak 2.0

Broken English description

This goodies is a modification for Squeak from Mr. AOKI's
Bit Field
Goodies for VisualWorks 2.5 and VisualWave 1.0
Copyright (c) 1995-1998 AOKI Atsushi
1998/01/05
http://www.sra.co.jp/people/aoki/SmalltalkGoodies/VisualWorks/BitField.st
http://www.sra.co.jp/people/aoki/SmalltalkGoodies/VisualWorks/BitField.txt

Summary:

This is a goodies for compact using for On or Off, true or 
false, yes or no, etc.

Usually, we use true and false object for binary expression.
It uses same space as a object pointer.  In a  machine of 
32bit architecture, It requires 4 bytes.  This is a wasteful 
thing for a program which requires many options (binary 
expression).

This goodies expresses true or false for 1 bit.  So you can 
use many options (binary expression) with compact memory.


How to install:

FileIn this goodies and makes a class "BitField" in a 
category "Goodies-Collections". 

This source adds no change to existing classes or methods.
It completes within self.

When you want to restore your image, please remove this class 
"BitField" from your system, simply.


How to use:

See examples.


##########################################################

青木さんの
http://www.sra.co.jp/people/aoki/SmalltalkGoodies/VisualWorks/BitField.st
を Squeak 用にいじったものです。
ドキュメントは
http://www.sra.co.jp/people/aoki/SmalltalkGoodies/VisualWorks/BitField.txt
を参照してください。

----------------------------------------------------------
西原聡士 (NISHIHARA Satoshi)
e-mail: mailto:nishis@zephyr.dti.ne.jp
URL:    http://www.zephyr.dti.ne.jp/~nishis/
----------------------------------------------------------