2008-09-24 20:32:01 +01:00
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/***************************************************************************
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* Copyright (C) 2008 by Volker Lanz <vl@fidra.de> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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***************************************************************************/
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#include "util/capacity.h"
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#include "core/partition.h"
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#include "core/device.h"
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#include <kglobal.h>
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#include <klocale.h>
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#include <kdebug.h>
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const QString Capacity::m_InvalidString = "---";
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/** Creates a new Capacity instance.
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@param size the size in bytes
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*/
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Capacity::Capacity(qint64 size) :
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m_Size(size)
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{
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}
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/** Creates a new Capacity instance.
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@param p the Partition
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@param t type of Capacity
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*/
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Capacity::Capacity(const Partition& p, Type t) :
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m_Size(-1)
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{
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switch(t)
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{
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case Used: m_Size = p.used(); break;
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case Available: m_Size = p.available(); break;
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case Total: m_Size = p.capacity(); break;
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default: break;
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}
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}
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/** Creates a new Capacity instance.
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@param d the Device
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*/
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Capacity::Capacity(const Device& d) :
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m_Size(d.capacity())
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{
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}
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/** Returns the Capacity as string.
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@param f flags to set how to format the Capacity
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@return the Capacity as string */
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QString Capacity::toString(Flags f) const
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{
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return toString(bestUnit(), f);
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}
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/** Returns the Capacity as string.
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@param u the unit to use
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@param f flags to set how to format the Capacity
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@return the Capacity as string */
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QString Capacity::toString(Unit u, Flags f) const
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{
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2010-02-17 10:27:42 +00:00
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QString s = toStringInternal(u);
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2008-09-24 20:32:01 +01:00
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if ((f & AppendUnit) && s != invalidString())
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s += ' ' + unitName(u);
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if ((f & AppendBytes) && s != invalidString())
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s += " (" + KGlobal::locale()->formatNumber(m_Size, 0) + ' ' + unitName(Byte) + ')';
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return s;
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}
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/** @return the Capacity as bytes */
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qint64 Capacity::toInt() const
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{
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return static_cast<qint64>(m_Size / unitFactor(Byte, bestUnit()));
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}
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/** Returns the Capacity converted to the given Unit.
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@param u the Unit to use
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@return the Capacity in the given Unit */
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qint64 Capacity::toInt(Unit u) const
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{
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return static_cast<qint64>(m_Size / unitFactor(Byte, u));
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}
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2009-07-02 12:26:26 +01:00
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/** Returns a factor to convert between two Units.
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2008-09-24 20:32:01 +01:00
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@param from the Unit to convert from
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@param to the Unit to convert to
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@return the factor to use for conversion
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*/
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qint64 Capacity::unitFactor(Unit from, Unit to)
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{
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Q_ASSERT(from <= to);
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if (from > to)
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{
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kWarning() << "from: " << from << ", to: " << to;
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return 1;
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}
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qint64 result = 1;
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qint32 a = from;
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qint32 b = to;
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while(b-- > a)
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result *= 1024;
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return result;
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}
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/** Determine the best Unit to use for the Capacity.
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@return the best Unit to use
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*/
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Capacity::Unit Capacity::bestUnit() const
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{
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qint32 u = Byte;
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qint64 size = m_Size;
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while (size > 850)
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{
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size /= 1024;
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u++;
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}
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return static_cast<Unit>(u);
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}
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/** @return the name of the Unit used in bestUnit() */
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QString Capacity::unitName() const
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{
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return unitName(bestUnit());
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}
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/** Returns the name of a given Unit.
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@param u the Unit to find the name for
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@return the name
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*/
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QString Capacity::unitName(Unit u)
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{
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static QString unitNames[] =
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{
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i18nc("@info/plain unit", "Byte"),
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i18nc("@info/plain unit", "KiB"),
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i18nc("@info/plain unit", "MiB"),
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i18nc("@info/plain unit", "GiB"),
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i18nc("@info/plain unit", "TiB"),
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i18nc("@info/plain unit", "PiB"),
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i18nc("@info/plain unit", "EiB"),
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i18nc("@info/plain unit", "ZiB"),
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i18nc("@info/plain unit", "YiB")
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};
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if (static_cast<quint32>(u) >= sizeof(unitNames) / sizeof(unitNames[0]))
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return i18nc("@info/plain unit", "(unknown unit)");
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return unitNames[u];
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}
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2008-11-21 13:56:39 +00:00
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/** Determine if the capacity is valid.
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@return true if it is valid
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*/
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bool Capacity::isValid() const
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{
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return m_Size >= 0;
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}
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2010-02-17 10:27:42 +00:00
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QString Capacity::toStringInternal(Unit u) const
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2008-09-24 20:32:01 +01:00
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{
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if (m_Size < 0)
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return invalidString();
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2010-02-17 10:27:42 +00:00
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qint64 unitSize = unitFactor(Byte, u);
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2008-09-24 20:32:01 +01:00
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const double num = static_cast<double>(m_Size) / static_cast<double>(unitSize);
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2010-02-17 10:27:42 +00:00
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return KGlobal::locale()->formatNumber(num, u == Byte ? 0 : -1);
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2008-09-24 20:32:01 +01:00
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}
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