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/* This file is part of the KDE project
Copyright (C) 2003,2004 Ariya Hidayat <ariya@kde.org>
Copyright (C) 2005 Tomas Mecir <mecirt@gmail.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; only
version 2 of the License.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
// Local
#include "Function.h"
#include "Value.h"
using namespace Calligra::Sheets;
class Q_DECL_HIDDEN Function::Private
{
public:
QString name;
QString alternateName;
FunctionPtr ptr;
int paramMin, paramMax;
bool acceptArray;
bool ne; // need FunctionExtra* when called ?
};
Function::Function(const QString& name, FunctionPtr ptr)
: d(new Private)
{
d->name = name;
d->ptr = ptr;
d->acceptArray = false;
d->paramMin = 1;
d->paramMax = 1;
d->ne = false;
}
Function::~Function()
{
delete d;
}
QString Function::name() const
{
return d->name;
}
QString Function::alternateName() const
{
return d->alternateName;
}
void Function::setAlternateName(const QString &name)
{
d->alternateName = name;
}
void Function::setParamCount(int min, int max)
{
d->paramMin = min;
d->paramMax = (max == 0) ? min : max;
}
bool Function::paramCountOkay(int count)
{
// less than needed
if (count < d->paramMin) return false;
// no upper limit
if (d->paramMax == -1) return true;
// more than needed
if (count > d->paramMax) return false;
// okay otherwise
return true;
}
void Function::setAcceptArray(bool accept)
{
d->acceptArray = accept;
}
bool Function::needsExtra()
{
return d->ne;
}
void Function::setNeedsExtra(bool extra)
{
d->ne = extra;
}
Value Function::exec(valVector args, ValueCalc *calc, FuncExtra *extra)
{
// check number of parameters
if (!paramCountOkay(args.count()))
return Value::errorVALUE();
if (extra)
extra->function = this;
// do we need to perform array expansion ?
bool mustExpandArray = false;
if (!d->acceptArray)
for (int i = 0; i < args.count(); ++i) {
if (args[i].isArray())
mustExpandArray = true;
}
if (!d->ptr) return Value::errorVALUE();
// perform the actual array expansion if need be
if (mustExpandArray) {
// compute number of rows/cols of the result
int rows = 0;
int cols = 0;
for (int i = 0; i < args.count(); ++i) {
int x = 1;
if (extra) x = extra->ranges[i].rows();
if (x > rows) rows = x;
if (extra) x = extra->ranges[i].columns();
if (x > cols) cols = x;
}
// allocate the resulting array
Value res(Value::Array);
// perform the actual computation for each element of the array
for (int row = 0; row < rows; ++row)
for (int col = 0; col < cols; ++col) {
// fill in the parameter vector
valVector vals(args.count());
FuncExtra extra2 = *extra;
for (int i = 0; i < args.count(); ++i) {
int r = extra->ranges[i].rows();
int c = extra->ranges[i].columns();
vals[i] = args[i].isArray() ?
args[i].element(col % c, row % r) : args[i];
// adjust the FuncExtra structure to refer to the correct cells
extra2.ranges[i].col1 += col;
extra2.ranges[i].row1 += row;
extra2.ranges[i].col2 = extra2.ranges[i].col1;
extra2.ranges[i].row2 = extra2.ranges[i].row1;
}
// execute the function on each element
res.setElement(col, row, exec(vals, calc, &extra2));
}
return res;
} else
// call the function
return (*d->ptr)(args, calc, extra);
}
FunctionCaller::FunctionCaller(FunctionPtr ptr, const valVector &args, ValueCalc *calc, FuncExtra *extra)
: m_ptr(ptr), m_args(args), m_calc(calc), m_extra(extra)
{
}
Value FunctionCaller::exec()
{
return (*m_ptr)(m_args, m_calc, m_extra);
}
Value FunctionCaller::exec(const valVector &args)
{
return (*m_ptr)(args, m_calc, m_extra);
}
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