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/* This file is part of the FaCT++ DL reasoner
Copyright (C) 2005-2015 Dmitry Tsarkov and The University of Manchester
Copyright (C) 2015-2016 Dmitry Tsarkov
This library 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 2.1 of the License, or (at your option) any later version.
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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef DATATYPECOMPARATOR_H
#define DATATYPECOMPARATOR_H
#include <time.h>
#include <string>
#include <ostream>
#include "fpp_assert.h"
#include "globaldef.h"
/// allows one to compare DataType values wrt appropriate type
class ComparableDT
{
private:
/// value as a string
std::string strValue;
/// value as a number
long longIntValue;
/// value as a float
float floatValue;
/// value as a date
long timeValue; // FIXME!! FORNOW
/// tag of a value
enum ValueType { UNUSED = 0, INT, STR, FLOAT, TIME } vType;
public:
/// create empty dt
ComparableDT ( void )
: strValue("")
, longIntValue(0)
, floatValue(0.0)
, timeValue(0)
, vType(UNUSED)
{}
/// create NUMBER's dt
explicit ComparableDT ( long int value )
: strValue("")
, longIntValue(value)
, floatValue(0.0)
, timeValue(0)
, vType(INT)
{}
/// create STRING's dt
explicit ComparableDT ( const char* value )
: strValue(value)
, longIntValue(0)
, floatValue(0.0)
, timeValue(0)
, vType(STR)
{}
/// create FLOAT's dt
explicit ComparableDT ( float value )
: strValue("")
, longIntValue(0)
, floatValue(value)
, timeValue(0)
, vType(FLOAT)
{}
/// create dateTime's dt; use dummy parameter to distinguish it from INT one
explicit ComparableDT ( long value, int )
: strValue("")
, longIntValue(0)
, floatValue(0.0)
, timeValue(value)
, vType(TIME)
{}
/// copy c'tor
ComparableDT ( const ComparableDT& copy )
: strValue(copy.strValue)
, longIntValue(copy.longIntValue)
, floatValue(copy.floatValue)
, timeValue(copy.timeValue)
, vType(copy.vType)
{}
/// assignment
ComparableDT& operator= ( const ComparableDT& copy )
{
vType = copy.vType;
strValue = copy.strValue;
longIntValue = copy.longIntValue;
floatValue = copy.floatValue;
timeValue = copy.timeValue;
return *this;
}
/// empty d'tor
~ComparableDT ( void ) {}
/// get NUMBER
long int getLongIntValue ( void ) const { return longIntValue; }
/// get STRING
const std::string& getStringValue ( void ) const { return strValue; }
/// get FLOAT
float getFloatValue ( void ) const { return floatValue; }
/// get TIME
long getTimeValue ( void ) const { return timeValue; }
/// check if the datatype is discrete
bool hasDiscreteType ( void ) const { return vType == INT || vType == TIME; }
/// check whether the comparator is inited
bool inited ( void ) const { return vType != UNUSED; }
/// check whether the comparator is compatible with another one
bool compatible ( const ComparableDT& other ) const { return !inited() || !other.inited() || vType == other.vType; }
/// correct min value if the DT is discrete and EXCL is true; @return new EXCL value
bool correctMin ( bool excl )
{
if ( vType == INT && excl )
{ // transform (n,} into [n+1,}
longIntValue++;
return false;
}
if ( vType == TIME && excl )
{ // transform (n,} into [n+1,}
timeValue++;
return false;
}
return excl;
}
/// correct max value if the DT is discrete and EXCL is true; @return new EXCL value
bool correctMax ( bool excl )
{
if ( vType == INT && excl )
{ // transform (n,} into [n+1,}
longIntValue--;
return false;
}
if ( vType == TIME && excl )
{ // transform (n,} into [n+1,}
timeValue--;
return false;
}
return excl;
}
// compare 2 values
/// check whether 2 DT entries with the same TYPE are equal
bool operator == ( const ComparableDT& other ) const
{
fpp_assert ( vType == other.vType ); // sanity check
switch ( vType )
{
case INT: return getLongIntValue() == other.getLongIntValue();
case STR: return getStringValue() == other.getStringValue();
case FLOAT: return getFloatValue() == other.getFloatValue();
case TIME: return getTimeValue() == other.getTimeValue();
default: fpp_unreachable(); return false;
}
}
/// check whether 2 DT entries with the same TYPE are NOT equal
bool operator != ( const ComparableDT& other ) const
{ return !(*this == other); }
/// check whether 2 DT entries with the same TYPE are in '<' relation
bool operator < ( const ComparableDT& other ) const
{
fpp_assert ( vType == other.vType ); // sanity check
switch ( vType )
{
case INT: return getLongIntValue() < other.getLongIntValue();
case STR: return getStringValue() < other.getStringValue();
case FLOAT: return getFloatValue() < other.getFloatValue();
case TIME: return getTimeValue() < other.getTimeValue();
default: fpp_unreachable(); return false;
}
}
/// check whether 2 DT entries with the same TYPE are in '>' relation
bool operator > ( const ComparableDT& other ) const { return other < *this; }
/// print the LISP value of a DTC; FIXME!! hack
std::ostream& printValue ( std::ostream& o ) const
{
o << ' ';
switch ( vType )
{
case INT: o << getLongIntValue(); break;
case FLOAT: o << getFloatValue(); break;
case STR: o << '"' << getStringValue().c_str() << '"'; break;
case TIME: o << getTimeValue(); break;
default: fpp_unreachable();
}
return o;
}
friend std::ostream& operator << ( std::ostream& o, const ComparableDT& cdt );
}; // ComparableDT
inline
std::ostream& operator << ( std::ostream& o, const ComparableDT& cdt )
{
switch ( cdt.vType )
{
case ComparableDT::INT: o << cdt.getLongIntValue(); break;
case ComparableDT::STR: o << cdt.getStringValue().c_str(); break;
case ComparableDT::FLOAT: o << cdt.getFloatValue(); break;
case ComparableDT::TIME: o << cdt.getTimeValue(); break;
default: fpp_unreachable();
}
return o;
}
#endif
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