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//start of LittleEndian.java
//TEXT_STYLE:CODE=Shift_JIS(Japanese):RET_CODE=CRLF
/**
* LittleEndian.java
*
* Copyright (C) 2001-2002 Michel Ishizuka All rights reserved.
*
* ȉ̏ɓӂȂ\[XƃoCi`̍ĔzzƎgp
* ύX̗Lɂ炸B
*
* PD\[XR[h̍ĔzzɂĒ쌠\ ̏̃Xg
* щL̐ێȂĂ͂ȂȂB
*
* QDoCi`̍ĔzzɂĒ쌠\ ̏̃Xg
* щL̐gp ̑̔zz
* ܂ގɋLqȂȂȂB
*
* ̃\tgEFA͐Β˔ڂɂĖۏŒA̖
* IBłƂۏAilLƂۏɂƂǂ܂炸A
* Ȃ閾IшÎIȕۏȂB
* Β˔ڂ ̃\tgEFA̎gpɂ钼ړIAԐړIA
* IAȁAT^IȁA邢͕KRIȑQ(gpɂf[^
* AƖ̒f〈܂Ăv̈⎸Ai
* T[rX̓l邪AĂꂾɌ肳Ȃ
* Q)ɑāAȂ鎖Ԃ̌ƂȂƂĂA_̐
* C△ߎӔC܂ ȂӔC낤ƂAƂꂪs
* ŝׂ߂łƂĂA܂͂̂悤ȑQ̉\
* ĂƂĂ̐ӔCȂ̂ƂB
*/
package jp.gr.java_conf.dangan.io;
//import classes and interfaces
import java.io.InputStream;
import java.io.OutputStream;
//import exceptions
import java.io.IOException;
import java.io.EOFException;
import java.lang.ArrayIndexOutOfBoundsException;
/**
* gGfBA
* oCgz InputStream, OutputStream
* ɃANZX郁\bh郆[eBeBNXB
*
* <pre>
* -- revision history --
* $Log: LittleEndian.java,v $
* Revision 1.0 2002/07/24 00:00:00 dangan
* add to version control
* [change]
* writeByte(), readByte() PB
* [maintenance]
* \[X
*
* </pre>
*
* @author $Author: dangan $
* @version $Revision: 1.0 $
*/
public class LittleEndian{
//------------------------------------------------------------------
// constructor
//------------------------------------------------------------------
// private LittleEndian()
//------------------------------------------------------------------
/**
* ftHgRXgN^BgpsB
*/
private LittleEndian(){ }
//------------------------------------------------------------------
// shared method
//------------------------------------------------------------------
// read from byte array
//------------------------------------------------------------------
// public static final int readShort( byte[] ByteArray, int index )
// public static final int readInt( byte[] ByteArray, int index )
// public static final long readLong( byte[] ByteArray, int index )
//------------------------------------------------------------------
/**
* ByteArray index ̈ʒu gGfBA
* 2oCglǂݏoBǂݏoꂽ 2oCgl
* 0x0000`0xFFFFɃ}bvB
*
* @param ByteArray oCgz
* @param index ByteArraỹf[^̊Jnʒu
*
* @return ǂݏoꂽ2oCgl
*
* @exception ArrayIndexOutOfBoundsException
* indexn܂f[^
* ByteArray͈͓̔ɖꍇB
*/
public static final int readShort( byte[] ByteArray, int index ){
return ( ByteArray[index] & 0xFF )
| ( ( ByteArray[index + 1] & 0xFF ) << 8 );
}
/**
* ByteArray index ̈ʒu烊gGfBA
* 4oCglǂݏoB
*
* @param ByteArray oCgz
* @param index ByteArraỹf[^̊Jnʒu
*
* @return ǂݏoꂽ4oCgl
*
* @exception ArrayIndexOutOfBoundsException
* indexn܂f[^
* ByteArray͈͓̔ɖꍇB
*/
public static final int readInt( byte[] ByteArray, int index ){
return ( ByteArray[index] & 0xFF )
| ( ( ByteArray[index + 1] & 0xFF ) << 8 )
| ( ( ByteArray[index + 2] & 0xFF ) << 16 )
| ( ByteArray[index + 3] << 24 );
}
/**
* ByteArray index ̈ʒu烊gGfBA
* 8oCglǂݏoB
*
* @param ByteArray oCgz
* @param index ByteArraỹf[^̊Jnʒu
*
* @return ǂݏoꂽ8oCgl
*
* @exception ArrayIndexOutOfBoundsException
* indexn܂f[^
* ByteArray͈͓̔ɖꍇB
*/
public static final long readLong( byte[] ByteArray, int index ){
return ( (long)LittleEndian.readInt( ByteArray, index ) & 0xFFFFFFFFL )
| ( (long)LittleEndian.readInt( ByteArray, index + 4 ) << 32L );
}
//------------------------------------------------------------------
// shared method
//------------------------------------------------------------------
// read from InputStream
//------------------------------------------------------------------
// public static final int readShort( InputStream in )
// public static final int readInt( InputStream in )
// public static final long readLong( InputStream in )
//------------------------------------------------------------------
/**
* ̓Xg[ in gGfBA
* 2bytelǂݏoB
*
* @param in ̓Xg[
*
* @return ǂݏoꂽ2bytel
*
* @exception EOFException
* End Of StreamɒBĂA
* ǂݍ݂̓r End Of StreamɒBB
* ǂݍݓr̃f[^͏B
* @exception IOException
* o̓G[ꍇ
*/
public static final int readShort( InputStream in )
throws IOException {
int byte1 = in.read();
int byte2 = in.read();
if( 0 <= byte1 && 0 <= byte2 ){
return ( byte1 & 0xFF )
| ( ( byte2 & 0xFF ) << 8 );
}else{
throw new EOFException();
}
}
/**
* ̓Xg[ in gGfBA
* 4bytelǂݏoB
*
* @param in ̓Xg[
*
* @return ǂݏoꂽ4bytel
*
* @exception EOFException
* End Of StreamɒBĂA
* ǂݍ݂̓r End Of StreamɒBB
* ǂݍݓr̃f[^͏B
* @exception IOException
* o̓G[ꍇ
*/
public static final int readInt( InputStream in )
throws IOException {
int byte1 = in.read();
int byte2 = in.read();
int byte3 = in.read();
int byte4 = in.read();
if( 0 <= byte1 && 0 <= byte2 && 0 <= byte3 && 0 <= byte4 ){
return ( byte1 & 0xFF )
| ( ( byte2 & 0xFF ) << 8 )
| ( ( byte3 & 0xFF ) << 16 )
| ( byte4 << 24 );
}else{
throw new EOFException();
}
}
/**
* ̓Xg[ in gGfBA
* 8bytelǂݏoB
*
* @param in ̓Xg[
*
* @return ǂݏoꂽ8bytel
*
* @exception EOFException
* End Of StreamɒBĂA
* ǂݍ݂̓r End Of StreamɒBB
* ǂݍݓr̃f[^͏B
* @exception IOException
* o̓G[ꍇ
*/
public static final long readLong( InputStream in )
throws IOException {
return ( (long)LittleEndian.readInt( in ) & 0xFFFFFFFFL )
| ( (long)LittleEndian.readInt( in ) << 32 );
}
//------------------------------------------------------------------
// shared method
//------------------------------------------------------------------
// write to byte array
//------------------------------------------------------------------
// public static final void writeShort( byte[] ByteArray, int index, int value )
// public static final void writeInt( byte[] ByteArray, int index, int value )
// public static final void writeLong( byte[] ByteArray, int index, long value )
//------------------------------------------------------------------
/**
* ByteArray index ̈ʒuɃgGfBA
* 2byteloB
*
* @param ByteArray oCgz
* @param index ByteArraỹf[^ވʒu
* @param value 2bytel
*
* @exception ArrayIndexOutOfBoundsException
* indexn܂f[^
* ByteArray͈͓̔ɖꍇB
*/
public static final void writeShort( byte[] ByteArray,
int index,
int value ){
if( 0 <= index && index + 1 < ByteArray.length ){
ByteArray[index] = (byte)value;
ByteArray[index + 1] = (byte)( value >> 8 );
}else{
throw new ArrayIndexOutOfBoundsException();
}
}
/**
* ByteArray index ̈ʒuɃgGfBA
* 4byteloB
*
* @param ByteArray oCgz
* @param index ByteArraỹf[^ވʒu
* @param value 4bytel
*
* @exception ArrayIndexOutOfBoundsException
* indexn܂f[^
* ByteArray͈͓̔ɖꍇB
*/
public static final void writeInt( byte[] ByteArray,
int index,
int value ){
if( 0 <= index && index + 3 < ByteArray.length ){
ByteArray[index] = (byte)value;
ByteArray[index + 1] = (byte)( value >> 8 );
ByteArray[index + 2] = (byte)( value >> 16 );
ByteArray[index + 3] = (byte)( value >> 24 );
}else{
throw new ArrayIndexOutOfBoundsException();
}
}
/**
* ByteArray index ̈ʒuɃgGfBA
* 8byteloB
*
* @param ByteArray oCgz
* @param index ByteArraỹf[^ވʒu
* @param value 8bytel
*
* @exception ArrayIndexOutOfBoundsException
* indexn܂f[^
* ByteArray͈͓̔ɖꍇB
*/
public static final void writeLong( byte[] ByteArray,
int index,
long value ){
if( 0 <= index && index + 7 < ByteArray.length ){
LittleEndian.writeInt( ByteArray, index, (int)value );
LittleEndian.writeInt( ByteArray, index + 4, (int)(value >> 32) );
}else{
throw new ArrayIndexOutOfBoundsException();
}
}
//------------------------------------------------------------------
// shared method
//------------------------------------------------------------------
// write to OutputStream
//------------------------------------------------------------------
// public static final void writeShort( OutputStream out, int value )
// public static final void writeInt( OutputStream out, int value )
// public static final void writeLong( OutputStream out, long value )
//------------------------------------------------------------------
/**
* o̓Xg[ out gGfBA
* 2oCgoB
*
* @param out o̓Xg[
* @param value o2oCgl
*
* @exception IOException
* o̓G[ꍇ
*/
public static final void writeShort( OutputStream out, int value )
throws IOException {
out.write( value & 0xFF );
out.write( ( value >> 8 ) & 0xFF );
}
/**
* o̓Xg[ out gGfBA
* 4oCgloB
*
* @param out o̓Xg[
* @param value o1oCgl
*
* @exception IOException
* o̓G[ꍇ
*/
public static final void writeInt( OutputStream out, int value )
throws IOException {
out.write( value & 0xFF );
out.write( ( value >> 8 ) & 0xFF );
out.write( ( value >> 16 ) & 0xFF );
out.write( value >>> 24 );
}
/**
* o̓Xg[ out gGfBA
* 8oCgloB
*
* @param out o̓Xg[
* @param value o1oCgl
*
* @exception IOException
* o̓G[ꍇ
*/
public static final void writeLong( OutputStream out, long value )
throws IOException {
int low = (int)value;
int hi = (int)( value >> 32 );
out.write( low & 0xFF );
out.write( ( low >> 8 ) & 0xFF );
out.write( ( low >> 16 ) & 0xFF );
out.write( low >>> 24 );
out.write( hi & 0xFF );
out.write( ( hi >> 8 ) & 0xFF );
out.write( ( hi >> 16 ) & 0xFF );
out.write( hi >>> 24 );
}
}
//end of LittleEndian.java
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