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rulebank.cpp
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rulebank.cpp
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/** @file rulebank.cpp Bank of Rules.
*
* @authors Copyright (c) 2013 Jaakko Keränen <jaakko.keranen@iki.fi>
*
* @par License
* GPL: http://www.gnu.org/licenses/gpl.html
*
* <small>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, see:
* http://www.gnu.org/licenses</small>
*/
#include "de/RuleBank"
#include <de/ConstantRule>
#include <de/ScriptedInfo>
namespace de {
DENG2_PIMPL(RuleBank)
{
struct RuleSource : public ISource
{
InfoBank &bank;
String id;
RuleSource(InfoBank &b, String const &ruleId) : bank(b), id(ruleId) {}
Time modifiedAt() const { return bank.sourceModifiedAt(); }
Rule *load() const
{
Record const &def = bank[id];
return refless(new ConstantRule(def["constant"].value().asNumber()));
}
};
struct RuleData : public IData
{
Rule *rule;
RuleData(Rule *r) : rule(holdRef(r)) {}
~RuleData() { releaseRef(rule); }
};
ConstantRule *zero;
Instance(Public *i) : Base(i)
{
zero = new ConstantRule(0);
}
~Instance()
{
releaseRef(zero);
}
};
RuleBank::RuleBank() : InfoBank(DisableHotStorage), d(new Instance(this))
{}
void RuleBank::addFromInfo(File const &file)
{
LOG_AS("RuleBank");
parse(file);
addFromInfoBlocks("rule");
}
Rule const &RuleBank::rule(DotPath const &path) const
{
if(path.isEmpty()) return *d->zero;
return *static_cast<Instance::RuleData &>(data(path)).rule;
}
Bank::ISource *RuleBank::newSourceFromInfo(String const &id)
{
return new Instance::RuleSource(*this, id);
}
Bank::IData *RuleBank::loadFromSource(ISource &source)
{
return new Instance::RuleData(static_cast<Instance::RuleSource &>(source).load());
}
} // namespace de