khanat-opennel-code/code/nel/tools/3d/object_viewer/bound_checker.h
2016-01-24 17:08:32 +01:00

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// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef BOUND_CHECKER_H
#define BOUND_CHECKER_H
#include <nel/misc/types_nl.h>
/// This class implement bound checking for values. Can be used in an edition dialog
template <class T>
class CBoundChecker
{
public:
/** ctor
* the default doesn't enable bound checking
*/
CBoundChecker() : _UpperBoundEnabled(false), _LowerBoundEnabled(false) {}
/** enable upper bound use (e.g. value must be < or <= upper bound )
* \param upperBoundExcluded if true then the test is <, otherwise its <=
*/
void enableUpperBound(T upperBound, bool upperBoundExcluded)
{
_UpperBoundEnabled = true;
_UpperBoundExcluded = upperBoundExcluded;
_UpperBound = upperBound;
}
// disable upper bound usage
void disableUpperBound(void) { _UpperBoundEnabled = false; }
// get the upper bound
T getUpperBound(void) const { return _UpperBound; }
// test whether the upper bound is excluded of the test
bool isUpperBoundExcluded(void) const
{
return _UpperBoundExcluded;
}
/** enable lower bound use (e.g. value must be < or <= lower bound )
* \param lowerBoundExcluded if true then the test is <, otherwise its <=
*/
void enableLowerBound(T lowerBound, bool lowerBoundExcluded)
{
_LowerBoundEnabled = true;
_LowerBoundExcluded = lowerBoundExcluded;
_LowerBound = lowerBound;
}
// disable lower bound
void disableLowerBound(void) { _LowerBoundEnabled = false; }
// get the lower bound
T getLowerBound(void) const { return _LowerBound; }
// test whether the lower bound is excluded of the test
bool isLowerBoundExcluded(void) const
{
return _LowerBoundExcluded;
}
/** validate a value against upper bound. (if an upper bound was set
* \return NULL if ok or an error message
*/
const char *validateUpperBound(T v)
{
if (!_UpperBoundEnabled) return NULL;
if (_UpperBoundExcluded && v < _UpperBound) return NULL;
if (!_UpperBoundExcluded && v <= _UpperBound) return NULL;
return "value too high";
}
/** validate a value against lower bound. (if an lower bound was set
* \return NULL if ok or an error message
*/
const char *validateLowerBound(T v)
{
if (!_LowerBoundEnabled) return NULL;
if (_LowerBoundExcluded && v > _LowerBound) return NULL;
if (!_LowerBoundExcluded && v >= _LowerBound) return NULL;
return "value too low";
}
/// copy this bound checker object to another one
void duplicateBoundChecker(CBoundChecker<T> &dup)
{
dup._LowerBound = _LowerBound;
dup._LowerBoundEnabled = _LowerBoundEnabled;
dup._LowerBoundExcluded = _LowerBoundExcluded;
dup._UpperBound = _UpperBound;
dup._UpperBoundEnabled = _UpperBoundEnabled;
dup._UpperBoundExcluded = _UpperBoundExcluded;
}
protected:
bool _UpperBoundEnabled;
bool _UpperBoundExcluded;
T _UpperBound;
bool _LowerBoundEnabled;
bool _LowerBoundExcluded;
T _LowerBound;
};
/// some typedefs
typedef CBoundChecker<float> CBoundCheckerFloat;
typedef CBoundChecker<uint32> CBoundCheckerUInt;
typedef CBoundChecker<sint32> CBoundCheckerInt;
#endif