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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2026 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM 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 3 of the License, or
(at your option) any later version.
OpenFOAM 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 OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
#include "error.H"
// * * * * * * * * * * * * * Private Member Classes * * * * * * * * * * * * //
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::hashedEntry::hashedEntry
(
const Key& key,
hashedEntry* next,
const T& obj
)
:
key_(key),
next_(next),
obj_(obj)
{}
// * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * * //
template<class T, class Key, class Hash>
inline Foam::label
Foam::HashTable<T, Key, Hash>::hashKeyIndex(const Key& key) const
{
// size is power of two - this is the modulus
return Hash()(key) & (tableSize_ - 1);
}
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
template<class T, class Key, class Hash>
inline Foam::label Foam::HashTable<T, Key, Hash>::capacity() const
{
return tableSize_;
}
template<class T, class Key, class Hash>
inline Foam::label Foam::HashTable<T, Key, Hash>::size() const
{
return nElmts_;
}
template<class T, class Key, class Hash>
inline bool Foam::HashTable<T, Key, Hash>::empty() const
{
return !nElmts_;
}
template<class T, class Key, class Hash>
inline bool Foam::HashTable<T, Key, Hash>::insert
(
const Key& key,
const T& newEntry
)
{
return this->set(key, newEntry, true);
}
template<class T, class Key, class Hash>
inline bool Foam::HashTable<T, Key, Hash>::set
(
const Key& key,
const T& newEntry
)
{
return this->set(key, newEntry, false);
}
// * * * * * * * * * * * * * * * Member Operators * * * * * * * * * * * * * //
template<class T, class Key, class Hash>
inline T& Foam::HashTable<T, Key, Hash>::operator[](const Key& key)
{
iterator iter = this->find(key);
if (iter == this->end())
{
FatalErrorInFunction
<< key << " not found in table. Valid entries: "
<< toc()
<< exit(FatalError);
}
return *iter;
}
template<class T, class Key, class Hash>
inline const T& Foam::HashTable<T, Key, Hash>::operator[](const Key& key) const
{
const_iterator iter = this->find(key);
if (iter == this->cend())
{
FatalErrorInFunction
<< key << " not found in table. Valid entries: "
<< toc()
<< exit(FatalError);
}
return *iter;
}
template<class T, class Key, class Hash>
inline T& Foam::HashTable<T, Key, Hash>::operator()(const Key& key)
{
iterator iter = this->find(key);
if (iter == this->end())
{
this->insert(key, T());
return *find(key);
}
else
{
return *iter;
}
}
// * * * * * * * * * * * * * * * iterator base * * * * * * * * * * * * * * * //
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::iteratorBase::iteratorBase()
:
hashTable_(0),
entryPtr_(0),
hashIndex_(0)
{}
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::iteratorBase::iteratorBase
(
const HashTable<T, Key, Hash>* hashTbl
)
:
hashTable_(const_cast<HashTable<T, Key, Hash>*>(hashTbl)),
entryPtr_(0),
hashIndex_(0)
{
if (hashTable_->nElmts_)
{
// find first non-nullptr table entry
while
(
!(entryPtr_ = hashTable_->table_[hashIndex_])
&& ++hashIndex_ < hashTable_->tableSize_
)
{}
if (hashIndex_ >= hashTable_->tableSize_)
{
// make into an end iterator
entryPtr_ = 0;
hashIndex_ = 0;
}
}
}
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::iteratorBase::iteratorBase
(
const HashTable<T, Key, Hash>* hashTbl,
const hashedEntry* elmt,
const label hashIndex
)
:
hashTable_(const_cast<HashTable<T, Key, Hash>*>(hashTbl)),
entryPtr_(const_cast<hashedEntry*>(elmt)),
hashIndex_(hashIndex)
{}
template<class T, class Key, class Hash>
inline void
Foam::HashTable<T, Key, Hash>::iteratorBase::increment()
{
// A negative index is a special value from erase
if (hashIndex_ < 0)
{
// the markPos='-curPos-1', but we wish to continue at 'curPos-1'
// thus use '-(markPos+1) -1'
hashIndex_ = -(hashIndex_+1) - 1;
}
else if (entryPtr_)
{
if (entryPtr_->next_)
{
// Move to next element on the SLList
entryPtr_ = entryPtr_->next_;
return;
}
}
// else
// {
// // if we reach here (entryPtr_ is nullptr) it is already at the end()
// // we should probably stop
// }
// Step to the next table entry
while
(
++hashIndex_ < hashTable_->tableSize_
&& !(entryPtr_ = hashTable_->table_[hashIndex_])
)
{}
if (hashIndex_ >= hashTable_->tableSize_)
{
// make into an end iterator
entryPtr_ = 0;
hashIndex_ = 0;
}
}
template<class T, class Key, class Hash>
inline
const Key& Foam::HashTable<T, Key, Hash>::iteratorBase::key() const
{
return entryPtr_->key_;
}
template<class T, class Key, class Hash>
inline T&
Foam::HashTable<T, Key, Hash>::iteratorBase::object() const
{
return entryPtr_->obj_;
}
template<class T, class Key, class Hash>
inline const T&
Foam::HashTable<T, Key, Hash>::iteratorBase::cobject() const
{
return entryPtr_->obj_;
}
template<class T, class Key, class Hash>
inline bool Foam::HashTable<T, Key, Hash>::iteratorBase::operator==
(
const iteratorBase& iter
) const
{
return entryPtr_ == iter.entryPtr_;
}
template<class T, class Key, class Hash>
inline bool Foam::HashTable<T, Key, Hash>::iteratorBase::operator!=
(
const iteratorBase& iter
) const
{
return entryPtr_ != iter.entryPtr_;
}
template<class T, class Key, class Hash>
inline bool Foam::HashTable<T, Key, Hash>::iteratorBase::operator==
(
const iteratorEnd&
) const
{
return !entryPtr_;
}
template<class T, class Key, class Hash>
inline bool Foam::HashTable<T, Key, Hash>::iteratorBase::operator!=
(
const iteratorEnd&
) const
{
return entryPtr_;
}
// * * * * * * * * * * * * * * * * STL iterator * * * * * * * * * * * * * * //
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::iterator::iterator()
:
iteratorBase()
{}
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::iterator::iterator
(
const iteratorEnd&
)
:
iteratorBase()
{}
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::iterator::iterator
(
HashTable<T, Key, Hash>* hashTbl
)
:
iteratorBase(hashTbl)
{}
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::iterator::iterator
(
HashTable<T, Key, Hash>* hashTbl,
hashedEntry* elmt,
const label hashIndex
)
:
iteratorBase(hashTbl, elmt, hashIndex)
{}
template<class T, class Key, class Hash>
inline T&
Foam::HashTable<T, Key, Hash>::iterator::operator*() const
{
return this->object();
}
template<class T, class Key, class Hash>
inline T&
Foam::HashTable<T, Key, Hash>::iterator::operator()() const
{
return this->object();
}
template<class T, class Key, class Hash>
inline
typename Foam::HashTable<T, Key, Hash>::iterator&
Foam::HashTable<T, Key, Hash>::iterator::operator++()
{
this->increment();
return *this;
}
template<class T, class Key, class Hash>
inline typename Foam::HashTable<T, Key, Hash>::iterator
Foam::HashTable<T, Key, Hash>::iterator::operator++(int)
{
iterator old = *this;
this->increment();
return old;
}
template<class T, class Key, class Hash>
inline typename Foam::HashTable<T, Key, Hash>::iterator
Foam::HashTable<T, Key, Hash>::begin()
{
return iterator(this);
}
// * * * * * * * * * * * * * * * STL const_iterator * * * * * * * * * * * * * //
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::const_iterator::const_iterator()
:
iteratorBase()
{}
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::const_iterator::const_iterator
(
const HashTable<T, Key, Hash>::iterator& iter
)
:
iteratorBase(iter)
{}
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::const_iterator::const_iterator
(
const iteratorEnd&
)
:
iteratorBase()
{}
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::const_iterator::const_iterator
(
const HashTable<T, Key, Hash>* hashTbl
)
:
iteratorBase(hashTbl)
{}
template<class T, class Key, class Hash>
inline Foam::HashTable<T, Key, Hash>::const_iterator::const_iterator
(
const HashTable<T, Key, Hash>* hashTbl,
const hashedEntry* elmt,
const label hashIndex
)
:
iteratorBase(hashTbl, elmt, hashIndex)
{}
template<class T, class Key, class Hash>
inline const T&
Foam::HashTable<T, Key, Hash>::const_iterator::operator*() const
{
return this->cobject();
}
template<class T, class Key, class Hash>
inline const T&
Foam::HashTable<T, Key, Hash>::const_iterator::operator()() const
{
return this->cobject();
}
template<class T, class Key, class Hash>
inline
typename Foam::HashTable<T, Key, Hash>::const_iterator&
Foam::HashTable<T, Key, Hash>::const_iterator::operator++()
{
this->increment();
return *this;
}
template<class T, class Key, class Hash>
inline typename Foam::HashTable<T, Key, Hash>::const_iterator
Foam::HashTable<T, Key, Hash>::const_iterator::operator++(int)
{
const_iterator old = *this;
this->increment();
return old;
}
template<class T, class Key, class Hash>
inline typename Foam::HashTable<T, Key, Hash>::const_iterator
Foam::HashTable<T, Key, Hash>::cbegin() const
{
return const_iterator(this);
}
template<class T, class Key, class Hash>
inline typename Foam::HashTable<T, Key, Hash>::const_iterator
Foam::HashTable<T, Key, Hash>::begin() const
{
return this->cbegin();
}
// ************************************************************************* //
|