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functionvalue.cpp
112 lines (98 loc) · 2.71 KB
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functionvalue.cpp
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/*
* The Doomsday Engine Project -- libcore
*
* Copyright © 2004-2017 Jaakko Keränen <jaakko.keranen@iki.fi>
*
* @par License
* LGPL: http://www.gnu.org/licenses/lgpl.html
*
* <small>This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 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 Lesser
* General Public License for more details. You should have received a copy of
* the GNU Lesser General Public License along with this program; if not, see:
* http://www.gnu.org/licenses</small>
*/
#include "de/FunctionValue"
#include "de/Process"
#include "de/ArrayValue"
#include "de/Writer"
#include "de/Reader"
using namespace de;
FunctionValue::FunctionValue() : _func(new Function)
{
// We now hold the only reference to the function.
}
FunctionValue::FunctionValue(Function *func) : _func(de::holdRef(func))
{}
FunctionValue::~FunctionValue()
{
de::releaseRef(_func);
}
Value *FunctionValue::duplicate() const
{
return new FunctionValue(_func);
}
Value::Text FunctionValue::asText() const
{
return _func->asText();
}
bool FunctionValue::isTrue() const
{
return true;
}
bool FunctionValue::isFalse() const
{
return false;
}
dint FunctionValue::compare(Value const &value) const
{
FunctionValue const *other = dynamic_cast<FunctionValue const *>(&value);
if (!other)
{
return -1;
}
// Address comparison.
if (_func == other->_func)
{
return 0;
}
if (_func > other->_func)
{
return 1;
}
return -1;
}
void FunctionValue::call(Process &process, Value const &arguments, Value *self) const
{
ArrayValue const *array = dynamic_cast<ArrayValue const *>(&arguments);
if (!array)
{
/// @throw IllegalError The call arguments must be an array value.
throw IllegalError("FunctionValue::call", "Arguments is not an array");
}
process.call(*_func, *array, self);
}
void FunctionValue::operator >> (Writer &to) const
{
to << SerialId(FUNCTION) << *_func;
}
void FunctionValue::operator << (Reader &from)
{
SerialId id;
from >> id;
if (id != FUNCTION)
{
/// @throw DeserializationError The identifier that species the type of the
/// serialized value was invalid.
throw DeserializationError("FunctionValue::operator <<", "Invalid ID");
}
from >> *_func;
}
Value::Text FunctionValue::typeId() const
{
return "Function";
}