/*
Ochan - image board/anonymous forum
Copyright (C) 2010 David Seymore
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.ochan.util;
public class FileUtils {
/**
* The number of bytes in a kilobyte.
*/
public static final long ONE_KB = 1024;
/**
* The number of bytes in a megabyte.
*/
public static final long ONE_MB = ONE_KB * ONE_KB;
/**
* The number of bytes in a gigabyte.
*/
public static final long ONE_GB = ONE_KB * ONE_MB;
/**
* Returns a human-readable version of the file size, where the input
* represents a specific number of bytes.
*
* @param size
* the number of bytes
* @return a human-readable display value (includes units in binary powers)
* http://en.wikipedia.org/wiki/MiB
*/
public static String byteCountToDisplaySize(long size) {
String displaySize;
if (size / ONE_GB > 0) {
float value = Float.valueOf(size).floatValue()
/ Float.valueOf(ONE_GB).floatValue();
displaySize = String.valueOf(Round(value, 2)) + " GiB";
} else if (size / ONE_MB > 0) {
float value = Float.valueOf(size).floatValue()
/ Float.valueOf(ONE_MB).floatValue();
displaySize = String.valueOf(Round(value, 2)) + " MiB";
} else if (size / ONE_KB > 0) {
float value = Float.valueOf(size).floatValue()
/ Float.valueOf(ONE_KB).floatValue();
displaySize = String.valueOf(Round(value, 2)) + " KiB";
} else {
displaySize = String.valueOf(size) + " bytes";
}
return displaySize;
}
public static float Round(float value, int numberOfPlaces) {
float p = (float) Math.pow(10, numberOfPlaces);
value = value * p;
float tmp = Math.round(value);
return (float) tmp / p;
}
}
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