/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * This file incorporates work covered by the following license notice: * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed * with this work for additional information regarding copyright * ownership. The ASF licenses this file to you under the Apache * License, Version 2.0 (the "License"); you may not use this file * except in compliance with the License. You may obtain a copy of * the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
struct ScComplexRefData; class ScSortedRangeCache;
/* Query-related iterators. There is one template class ScQueryCellIteratorBase that implements most of the shared functionality, specific parts are done by specializing the templates and then subclassing as the actual class to use. A template is used for maximum performance, as that allows fast code specializing, inlining, etc. There are two template arguments: * ScQueryCellIteratorAccess specifies how cells are accessed: + Direct - direct access to cells using mdds. + SortedCache - for accessing unsorted cells in a sorted way using ScSortedRangeCache. * ScQueryCellIteratorType specifies the type of the query operation: + Generic - the generic lookup, used e.g. by VLOOKUP. + CountIf - faster implementation for COUNTIF(S).
Specific data should be in specific templated base classes, otherwise adding data members would mean specializing the entire ScQueryCellIteratorBase. Some specific functionality may also be implemented in the base classes or depending on the template parameter.
*/
// Data and functionality for accessing cells in a specific way. // Needs specialization, see ScQueryCellIteratorAccess::Direct for what is needed. template< ScQueryCellIteratorAccess accessType > class ScQueryCellIteratorAccessSpecific
{
};
// The implementation using linear direct mdds access. template<> class ScQueryCellIteratorAccessSpecific< ScQueryCellIteratorAccess::Direct >
{ protected:
ScQueryCellIteratorAccessSpecific( ScDocument& rDocument, ScInterpreterContext& rContext, const ScQueryParam& rParam, bool bReverseSearch ); // Initialize position for new column. void InitPos(); // Increase position (next row). void IncPos(); // Next mdds block. If access is not direct/linear, then // should call IncPos(). void IncBlock();
// Decrease position (prev row). void DecPos(); // Prev mdds block. If access is not direct/linear, then // should call DecPos(). void DecBlock();
// These members needs to be available already in the base class. typedef sc::CellStoreType::const_position_type PositionType;
PositionType maCurPos;
ScQueryParam maParam;
ScDocument& rDoc;
ScInterpreterContext& mrContext; bool mbReverseSearch;
SCTAB nTab;
SCCOL nCol;
SCROW nRow;
// Initialize for backward search. (no need for SortedCache) staticvoid DecPos() {}; staticvoid DecBlock() {};
// These members needs to be available already in the base class. typedef sc::CellStoreType::const_position_type PositionType;
PositionType maCurPos;
ScQueryParam maParam;
ScDocument& rDoc;
ScInterpreterContext& mrContext; bool mbReverseSearch;
SCTAB nTab;
SCCOL nCol;
SCROW nRow; const ScColumn* pColumn; // matching nCol, set by InitPos()
// Data and functionality for specific types of query. template< ScQueryCellIteratorType iteratorType > class ScQueryCellIteratorTypeSpecific
{ protected: bool HandleItemFound(); // not implemented, needs specialization
};
// Shared code for query-based iterators. The main class. template< ScQueryCellIteratorAccess accessType, ScQueryCellIteratorType queryType > class ScQueryCellIteratorBase
: public ScQueryCellIteratorAccessSpecific< accessType >
, public ScQueryCellIteratorTypeSpecific< queryType >
{ typedef ScQueryCellIteratorAccessSpecific< accessType > AccessBase; typedef ScQueryCellIteratorTypeSpecific< queryType > TypeBase; protected: enum StopOnMismatchBits
{
nStopOnMismatchDisabled = 0x00,
nStopOnMismatchEnabled = 0x01,
nStopOnMismatchOccurred = 0x02,
nStopOnMismatchExecuted = nStopOnMismatchEnabled | nStopOnMismatchOccurred
};
// Make base members directly visible here (templated bases need 'this->'). using AccessBase::maCurPos; using AccessBase::maParam; using AccessBase::rDoc; using AccessBase::mrContext; using AccessBase::mbReverseSearch; using AccessBase::nTab; using AccessBase::nCol; using AccessBase::nRow; using AccessBase::IncPos; using AccessBase::IncBlock; using AccessBase::DecPos; using AccessBase::DecBlock; usingtypename AccessBase::BinarySearchCellType; using AccessBase::MakeBinarySearchIndexer; using TypeBase::HandleItemFound;
void InitPos();
// The actual query function. It will call HandleItemFound() for any matching type // and return if HandleItemFound() returns true. void PerformQuery();
/* Only works if no regular expression is involved, only searches for rows in one column or only searches for cols in one row, and only the first query entry is considered with simple conditions SC_LESS,SC_LESS_EQUAL, SC_EQUAL (sorted ascending) or SC_GREATER,SC_GREATER_EQUAL (sorted descending). It delivers a starting point set to nRow/nCol, i.e. the last row/col that either matches the searched for value, or the last row/col that matches the condition. Continue with e.g. GetThis() and GetNext() afterwards. Returns false if the searched for value is not in the search range or if the range is not properly sorted, with nRow/nCol in that case set to the first row or after the last row. In that case use GetFirst().
*/ bool BinarySearch( SCCOLROW col_row, bool forEqual = false );
/** If set, iterator stops on first non-matching cell content. May be used in SC_LESS_EQUAL queries where a cell range is assumed to be sorted; stops on first value being greater than the queried value and GetFirst()/GetNext() return NULL. StoppedOnMismatch() returns true then. However, the iterator's conditions are not set to end all queries, GetCol() and GetRow() return values for the non-matching cell, further GetNext() calls may be
executed. */ void SetStopOnMismatch( bool bVal )
{
nStopOnMismatch = sal::static_int_cast<sal_uInt8>(bVal ? nStopOnMismatchEnabled :
nStopOnMismatchDisabled);
} bool StoppedOnMismatch() const
{ return nStopOnMismatch == nStopOnMismatchExecuted; }
/** If set, an additional test for SC_EQUAL condition is executed in ScTable::ValidQuery() if SC_LESS_EQUAL or SC_GREATER_EQUAL conditions are to be tested. May be used where a cell range is assumed to be sorted to stop
if an equal match is found. */ void SetTestEqualCondition( bool bVal )
{
nTestEqualCondition = sal::static_int_cast<sal_uInt8>(bVal ?
nTestEqualConditionEnabled :
nTestEqualConditionDisabled);
} bool IsEqualConditionFulfilled() const
{ return nTestEqualCondition == nTestEqualConditionFulfilled; }
void HandleBestFitItemFound(SCCOL nBFitCol, SCROW nBFitRow)
{
nBestFitCol = nBFitCol;
nBestFitRow = nBFitRow;
} public:
ScQueryCellIteratorBase(ScDocument& rDocument, ScInterpreterContext& rContext, SCTAB nTable, const ScQueryParam& aParam, bool bMod, bool bReverse); // when !bMod, the QueryParam has to be filled // (bIsString)
// increments all Entry.nField, if column // changes, for ScInterpreter ScHLookup() void SetAdvanceQueryParamEntryField( bool bVal )
{ bAdvanceQuery = bVal; } void AdvanceQueryParamEntryField(); void AdvanceQueryParamEntryFieldForBinarySearch();
// The generic query iterator, used e.g. by VLOOKUP. template< ScQueryCellIteratorAccess accessType > class ScQueryCellIterator
: public ScQueryCellIteratorBase< accessType, ScQueryCellIteratorType::Generic >
{ typedef ScQueryCellIteratorBase< accessType, ScQueryCellIteratorType::Generic > Base; // Make base members directly visible here (templated bases need 'this->'). using Base::maParam; using Base::rDoc; using Base::mrContext; using Base::mbReverseSearch; using Base::nTab; using Base::nCol; using Base::nRow; using Base::InitPos; using Base::IncPos; using Base::DecPos; using Base::bIgnoreMismatchOnLeadingStrings; using Base::SetStopOnMismatch; using Base::SetTestEqualCondition; using Base::BinarySearch; usingtypename Base::PositionType; using Base::maCurPos; using Base::IsEqualConditionFulfilled; using Base::bAdvanceQuery; using Base::StoppedOnMismatch; using Base::nStopOnMismatch; using Base::nStopOnMismatchEnabled; using Base::nTestEqualCondition; using Base::nTestEqualConditionEnabled; using Base::nSortedBinarySearch; using Base::nBinarySearchDisabled; using Base::PerformQuery; using Base::getThisResult; using Base::nBestFitCol; using Base::nBestFitRow; using Base::nSearchOpCode;
/** In a range assumed to be sorted find either the last of a sequence of equal entries or the last being less than (or greater than) the queried value. Used by the interpreter for [HV]?LOOKUP() and MATCH(). Column and row position of the found entry are returned, otherwise invalid.
The search does not stop when encountering a string and does not assume that no values follow anymore. If querying for a string a mismatch on the first entry, e.g. column header, is ignored.
@ATTENTION! StopOnMismatch, TestEqualCondition and the internal IgnoreMismatchOnLeadingStrings and query params are in an undefined state upon return! The iterator is not usable anymore except for obtaining the number format!
*/ bool FindEqualOrSortedLastInRange( SCCOL& nFoundCol, SCROW& nFoundRow );
};
// Used by ScInterpreter::ScCountIf. template< ScQueryCellIteratorAccess accessType > class ScCountIfCellIterator
: public ScQueryCellIteratorBase< accessType, ScQueryCellIteratorType::CountIf >
{ protected: typedef ScQueryCellIteratorBase< accessType, ScQueryCellIteratorType::CountIf > Base; // Make base members directly visible here (templated bases need 'this->'). using Base::maParam; using Base::rDoc; using Base::nTab; using Base::nCol; using Base::nRow; using Base::InitPos; using Base::PerformQuery; using Base::SetAdvanceQueryParamEntryField; using Base::countIfCount;
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