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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: recursionhelper.hxx,v $
*
* $Revision: 1.4 $
*
* last change: $Author: rt $ $Date: 2005-10-21 11:52:08 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#ifndef INCLUDED_RECURSIONHELPER_HXX
#define INCLUDED_RECURSIONHELPER_HXX
#include <list>
#include <stack>
#include <tools/solar.h>
class ScFormulaCell;
struct ScFormulaRecursionEntry
{
ScFormulaCell* pCell;
BOOL bOldRunning;
BOOL bPreviousNumeric;
double fPreviousResult;
String aPreviousString;
ScFormulaRecursionEntry( ScFormulaCell* p, BOOL bR, BOOL bN, double f,
const String& rS ) : pCell(p), bOldRunning(bR),
bPreviousNumeric(bN), fPreviousResult(f)
{
if (!bPreviousNumeric)
aPreviousString = rS;
}
};
typedef ::std::list< ScFormulaRecursionEntry > ScFormulaRecursionList;
class ScRecursionHelper
{
typedef ::std::stack< ScFormulaCell* > ScRecursionInIterationStack;
ScFormulaRecursionList aRecursionFormulas;
ScFormulaRecursionList::iterator aInsertPos;
ScFormulaRecursionList::iterator aLastIterationStart;
ScRecursionInIterationStack aRecursionInIterationStack;
USHORT nRecursionCount;
USHORT nIteration;
bool bInRecursionReturn;
bool bDoingRecursion;
bool bInIterationReturn;
bool bConverging;
void Init()
{
nRecursionCount = 0;
bInRecursionReturn = bDoingRecursion = bInIterationReturn = false;
aInsertPos = GetEnd();
ResetIteration();
}
void ResetIteration()
{
aLastIterationStart = GetEnd();
nIteration = 0;
bConverging = false;
}
public:
ScRecursionHelper() { Init(); }
USHORT GetRecursionCount() const { return nRecursionCount; }
void IncRecursionCount() { ++nRecursionCount; }
void DecRecursionCount() { --nRecursionCount; }
/// A pure recursion return, no iteration.
bool IsInRecursionReturn() const { return bInRecursionReturn &&
!bInIterationReturn; }
void SetInRecursionReturn( bool b )
{
// Do not use IsInRecursionReturn() here, it decouples iteration.
if (b && !bInRecursionReturn)
aInsertPos = aRecursionFormulas.begin();
bInRecursionReturn = b;
}
bool IsDoingRecursion() const { return bDoingRecursion; }
void SetDoingRecursion( bool b ) { bDoingRecursion = b; }
void Insert( ScFormulaCell* p, BOOL bOldRunning, BOOL bNumeric,
double fResult, const String& rStrResult )
{
aRecursionFormulas.insert( aInsertPos, ScFormulaRecursionEntry( p,
bOldRunning, bNumeric, fResult, rStrResult));
}
ScFormulaRecursionList::iterator GetStart()
{
return aRecursionFormulas.begin();
}
ScFormulaRecursionList::iterator GetEnd()
{
return aRecursionFormulas.end();
}
bool IsInIterationReturn() const { return bInIterationReturn; }
void SetInIterationReturn( bool b )
{
// An iteration return is always coupled to a recursion return.
SetInRecursionReturn( b);
bInIterationReturn = b;
}
bool IsDoingIteration() const { return nIteration > 0; }
USHORT GetIteration() const { return nIteration; }
bool & GetConvergingReference() { return bConverging; }
void StartIteration()
{
SetInIterationReturn( false);
nIteration = 1;
bConverging = false;
aLastIterationStart = GetIterationStart();
}
void ResumeIteration()
{
SetInIterationReturn( false);
aLastIterationStart = GetIterationStart();
}
void IncIteration() { ++nIteration; }
void EndIteration()
{
aRecursionFormulas.erase( GetIterationStart(), GetIterationEnd());
ResetIteration();
}
ScFormulaRecursionList::iterator GetLastIterationStart() { return aLastIterationStart; }
ScFormulaRecursionList::iterator GetIterationStart() { return GetStart(); }
ScFormulaRecursionList::iterator GetIterationEnd() { return GetEnd(); }
/** Any return, recursion or iteration, iteration is always coupled with
recursion. */
bool IsInReturn() const { return bInRecursionReturn; }
const ScFormulaRecursionList& GetList() const { return aRecursionFormulas; }
ScFormulaRecursionList& GetList() { return aRecursionFormulas; }
ScRecursionInIterationStack& GetRecursionInIterationStack() { return aRecursionInIterationStack; }
void Clear()
{
aRecursionFormulas.clear();
while (!aRecursionInIterationStack.empty())
aRecursionInIterationStack.pop();
Init();
}
};
#endif // INCLUDED_RECURSIONHELPER_HXX
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