com.crankuptheamps.client.fields.IntegerField Maven / Gradle / Ivy
////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2010-2022 60East Technologies Inc., All Rights Reserved.
//
// This computer software is owned by 60East Technologies Inc. and is
// protected by U.S. copyright laws and other laws and by international
// treaties. This computer software is furnished by 60East Technologies
// Inc. pursuant to a written license agreement and may be used, copied,
// transmitted, and stored only in accordance with the terms of such
// license agreement and with the inclusion of the above copyright notice.
// This computer software or any other copies thereof may not be provided
// or otherwise made available to any other person.
//
// U.S. Government Restricted Rights. This computer software: (a) was
// developed at private expense and is in all respects the proprietary
// information of 60East Technologies Inc.; (b) was not developed with
// government funds; (c) is a trade secret of 60East Technologies Inc.
// for all purposes of the Freedom of Information Act; and (d) is a
// commercial item and thus, pursuant to Section 12.212 of the Federal
// Acquisition Regulations (FAR) and DFAR Supplement Section 227.7202,
// Government's use, duplication or disclosure of the computer software
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////////////////////////////////////////////////////////////////////////////
package com.crankuptheamps.client.fields;
/**
* Field data for a {@link com.crankuptheamps.client.Message} consisting of an integer value.
*/
public class IntegerField extends Field
{
protected static final byte LATIN1_ZERO = 48;
private byte[] bytes = new byte[11]; // LOG10(2**32)<10 (+1 for sign)
/**
* Gets the value of this integer field as a Java 32-bit signed integer.
* @return The value as an int.
*/
public int getValue()
{
if(this.buffer != null)
{
int result = 0;
for(int i = position; i < position+length; ++i)
{
result = result * 10 + (buffer[i] - LATIN1_ZERO);
}
return result;
}
else
{
throw new NullPointerException("value is null");
}
}
/**
* Sets the value of this integer field using the specified Java 32-bit signed intger.
* @param v The int to use as the value.
*/
public void setValue(int v)
{
if(v==0)
{
bytes[0] = '0';
set(bytes,0,1);
}
else
{
int index = 0;
if(v < 0) // handle the sign
{
bytes[index++] = '-';
v = -v;
}
int cv = v;
while(cv > 0)
{
cv /= 10; // TODO: Faster than Log10?
++index;
}
int length = index;
while(v > 0)
{
bytes[--index] = (byte)(LATIN1_ZERO+(v%10));
v /= 10;
}
set(bytes,0,length);
}
}
}