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113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
/*
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* Copyright 2010 Matteo Agostinelli <agostinelli@gmail.com>
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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 Library General Public License as
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* published by the Free Software Foundation; either version 2 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 Library General Public
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* License 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 "qalculate_engine.h"
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#include <libqalculate/Calculator.h>
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#include <libqalculate/ExpressionItem.h>
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#include <libqalculate/Unit.h>
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#include <libqalculate/Prefix.h>
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#include <libqalculate/Variable.h>
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#include <libqalculate/Function.h>
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#include <QFile>
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#include <QApplication>
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#include <QClipboard>
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#include <KProtocolManager>
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#include <KDebug>
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#include <KLocale>
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#include <KIO/Job>
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#include <KIO/NetAccess>
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QAtomicInt QalculateEngine::s_counter;
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QalculateEngine::QalculateEngine(QObject* parent):
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QObject(parent)
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{
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m_lastResult = "";
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s_counter.ref();
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if (!CALCULATOR) {
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new Calculator();
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CALCULATOR->terminateThreads();
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CALCULATOR->loadGlobalDefinitions();
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CALCULATOR->loadLocalDefinitions();
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CALCULATOR->loadGlobalCurrencies();
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CALCULATOR->loadExchangeRates();
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}
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}
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QalculateEngine::~QalculateEngine()
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{
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if (s_counter.deref()) {
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delete CALCULATOR;
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CALCULATOR = NULL;
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}
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}
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QString QalculateEngine::evaluate(const QString& expression)
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{
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if (expression.isEmpty()) {
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return QString();
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}
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QString input = expression;
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QByteArray ba = input.replace(QChar(0xA3), "GBP").replace(QChar(0xA5), "JPY").replace('$', "USD").replace(QChar(0x20AC), "EUR").toLatin1();
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m_lastResult = QString();
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try {
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CALCULATOR->terminateThreads();
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EvaluationOptions eo;
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eo.auto_post_conversion = POST_CONVERSION_BEST;
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eo.keep_zero_units = false;
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eo.parse_options.angle_unit = ANGLE_UNIT_RADIANS;
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eo.structuring = STRUCTURING_SIMPLIFY;
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MathStructure result = CALCULATOR->calculate(ba.constData(), eo);
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PrintOptions po;
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po.number_fraction_format = FRACTION_DECIMAL;
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po.indicate_infinite_series = false;
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po.use_all_prefixes = false;
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po.use_denominator_prefix = true;
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po.negative_exponents = false;
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po.lower_case_e = true;
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po.base_display = BASE_DISPLAY_NORMAL;
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result.format(po);
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m_lastResult = result.print(po).c_str();
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} catch(std::exception &err) {
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kDebug() << err.what();
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} catch (...) {
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kDebug() << "Exception raised";
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}
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return m_lastResult;
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}
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void QalculateEngine::copyToClipboard(bool flag)
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{
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Q_UNUSED(flag);
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QApplication::clipboard()->setText(m_lastResult);
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}
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