/*
* JMule - Java file sharing client
* Copyright (C) 2007-2008 JMule team ( jmule@jmule.org / http://jmule.org )
*
* Any parts of this program derived from other projects, or contributed
* by third-party developers are copyrighted by their respective authors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
package org.jmule.ui.utils;
import java.text.NumberFormat;
import org.jmule.ui.UIConstants;
/**
* Created on Aug 11, 2008
* @author binary256
* @version $Revision: 1.1 $
* Last changed by $Author: binary256_ $ on $Date: 2008/08/26 19:39:47 $
*/
public class SpeedFormatter {
private static boolean use_units_rate_bits = false;
final public static int UNIT_B = 0;
final public static int UNIT_KB = 1;
final public static int UNIT_MB = 2;
final public static int UNIT_GB = 3;
final public static int UNIT_TB = 4;
private static int unitsStopAt = UNIT_TB;
final private static int UNITS_PRECISION[] = { 0, // B
1, //KB
2, //MB
2, //GB
3 //TB
};
private static String[] units_rate = new String[5];
private static String[] units = new String[5];
final private static NumberFormat[] cached_number_formats = new NumberFormat[20];
static {
units_rate[UNIT_B] = "B";
units_rate[UNIT_KB] = "KB";
units_rate[UNIT_MB] = "MB";
units_rate[UNIT_GB] = "GB";
units_rate[UNIT_TB] = "TB";
units[UNIT_B] = "B";
units[UNIT_KB] = "KB";
units[UNIT_MB] = "MB";
units[UNIT_GB] = "GB";
units[UNIT_TB] = "TB";
}
public static String formatSpeed(float speed) {
long n = (long)speed;
if (n < 1024)
return n + " B/s";
if (n < 1024 * 1024)
return (n / 1024) + "." + ((n % 1024) / 103) + " kB/s";
if (n < 1024 * 1024 * 1024)
return (n / (1024 * 1024))
+ "."
+ ((n % (1024 * 1024)) / (103 * 1024))
+ " MB/s";
if (n < 1024l * 1024l * 1024l * 1024l)
return (n / (1024l * 1024l * 1024l))
+ "."
+ ((n % (1024l * 1024l * 1024l)) / (103l * 1024l * 1024l))
+ " GB/s";
return "A lot !!!";
}
public static String formatByteCountToKiBEtcPerSec(long n, boolean bTruncateZeros) {
return( formatByteCountToKiBEtc(n,true, bTruncateZeros));
}
public static String formatByteCountToKiBEtc(long n, boolean rate, boolean bTruncateZeros) {
return formatByteCountToKiBEtc(n, rate, bTruncateZeros, -1);
}
public static String formatByteCountToKiBEtc(long n, boolean rate,boolean bTruncateZeros, int precision) {
double dbl = (rate && use_units_rate_bits) ? n * 8 : n;
int unitIndex = UNIT_B;
while (dbl >= 1024 && unitIndex < unitsStopAt){
dbl /= 1024L;
unitIndex++;
}
if (precision < 0) {
precision = UNITS_PRECISION[unitIndex];
}
// round for rating, because when the user enters something like 7.3kbps
// they don't want it truncated and displayed as 7.2
// (7.3*1024 = 7475.2; 7475/1024.0 = 7.2998; trunc(7.2998, 1 prec.) == 7.2
//
// Truncate for rest, otherwise we get complaints like:
// "I have a 1.0GB torrent and it says I've downloaded 1.0GB.. why isn't
// it complete? waaah"
return formatDecimal(dbl, precision, bTruncateZeros, rate)
+ (rate ? units_rate[unitIndex] : units[unitIndex]);
}
/**
* Format a real number
*
* @param value real number to format
* @param precision max # of digits after the decimal place
* @param bTruncateZeros remove any trailing zeros after decimal place
* @param bRound Whether the number will be rounded to the precision, or
* truncated off.
* @return formatted string
*/
public static String
formatDecimal(
double value,
int precision,
boolean bTruncateZeros,
boolean bRound)
{
if (Double.isNaN(value) || Double.isInfinite(value)) {
return UIConstants.INFINITY_STRING;
}
double tValue;
if (bRound) {
tValue = value;
} else {
// NumberFormat rounds, so truncate at precision
if (precision == 0) {
tValue = (long) value;
} else {
double shift = Math.pow(10, precision);
tValue = ((long) (value * shift)) / shift;
}
}
int cache_index = (precision << 2) + ((bTruncateZeros ? 1 : 0) << 1)
+ (bRound ? 1 : 0);
NumberFormat nf = null;
if (cache_index < cached_number_formats.length) {
nf = cached_number_formats[cache_index];
}
if (nf == null) {
nf = NumberFormat.getNumberInstance();
nf.setGroupingUsed(false); // no commas
if (!bTruncateZeros) {
nf.setMinimumFractionDigits(precision);
}
if (bRound) {
nf.setMaximumFractionDigits(precision);
}
if (cache_index < cached_number_formats.length) {
cached_number_formats[cache_index] = nf;
}
}
return nf.format(tValue);
}
}