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This commit is contained in:
Guenter Obiltschnig
2007-08-10 13:57:07 +00:00
parent 2ef3a4f9d2
commit a04bae94d7
63 changed files with 2735 additions and 352 deletions
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258
Foundation/include/Poco/LinearHashTable.h
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@@ -1,7 +1,7 @@
//
// LinearHashTable.h
//
// $Id: //poco/Main/Foundation/include/Poco/LinearHashTable.h#11 $
// $Id: //poco/Main/Foundation/include/Poco/LinearHashTable.h#13 $
//
// Library: Foundation
// Package: Hashing
@@ -86,40 +86,38 @@ public:
typedef HashFunc Hash;
typedef std::vector<Value> Bucket;
typedef std::vector<Bucket> BucketVec;
template <class VecIt, class BuckIt>
class BasicConstIterator;
template <class VecIt, class BuckIt>
class BasicIterator
typedef typename Bucket::iterator BucketIterator;
typedef typename BucketVec::iterator BucketVecIterator;
class ConstIterator
{
public:
BasicIterator()
ConstIterator()
{
}
BasicIterator(const VecIt& vecIt, const VecIt& endIt, const BuckIt& buckIt):
ConstIterator(const BucketVecIterator& vecIt, const BucketVecIterator& endIt, const BucketIterator& buckIt):
_vecIt(vecIt),
_endIt(endIt),
_buckIt(buckIt)
{
}
BasicIterator(const BasicIterator& it):
ConstIterator(const ConstIterator& it):
_vecIt(it._vecIt),
_endIt(it._endIt),
_buckIt(it._buckIt)
{
}
BasicIterator& operator = (const BasicIterator& it)
ConstIterator& operator = (const ConstIterator& it)
{
BasicIterator tmp(it);
ConstIterator tmp(it);
swap(tmp);
return *this;
}
void swap(BasicIterator& it)
void swap(ConstIterator& it)
{
using std::swap;
swap(_vecIt, it._vecIt);
@@ -127,169 +125,119 @@ public:
swap(_buckIt, it._buckIt);
}
bool operator == (const BasicIterator& it) const
bool operator == (const ConstIterator& it) const
{
return _vecIt == it._vecIt && (_vecIt == _endIt || _buckIt == it._buckIt);
}
bool operator != (const BasicIterator& it) const
bool operator != (const ConstIterator& it) const
{
return _vecIt != it._vecIt || (_vecIt != _endIt && _buckIt != it._buckIt);
}
typename Bucket::value_type& operator * ()
const typename Bucket::value_type& operator * () const
{
return *_buckIt;
}
const typename Bucket::value_type* operator -> () const
{
return &*_buckIt;
}
ConstIterator& operator ++ () // prefix
{
if (_vecIt != _endIt)
{
++_buckIt;
while (_vecIt != _endIt && _buckIt == _vecIt->end())
{
++_vecIt;
if (_vecIt != _endIt) _buckIt = _vecIt->begin();
}
}
return *this;
}
ConstIterator operator ++ (int) // postfix
{
ConstIterator tmp(*this);
++*this;
return tmp;
}
protected:
BucketVecIterator _vecIt;
BucketVecIterator _endIt;
BucketIterator _buckIt;
friend class LinearHashTable;
};
class Iterator: public ConstIterator
{
public:
Iterator()
{
}
Iterator(const BucketVecIterator& vecIt, const BucketVecIterator& endIt, const BucketIterator& buckIt):
ConstIterator(vecIt, endIt, buckIt)
{
}
Iterator(const Iterator& it):
ConstIterator(it)
{
}
Iterator& operator = (const Iterator& it)
{
Iterator tmp(it);
swap(tmp);
return *this;
}
void swap(Iterator& it)
{
ConstIterator::swap(it);
}
typename Bucket::value_type& operator * ()
{
return *this->_buckIt;
}
const typename Bucket::value_type& operator * () const
{
return *_buckIt;
return *this->_buckIt;
}
typename Bucket::value_type* operator -> ()
{
return &*_buckIt;
return &*this->_buckIt;
}
const typename Bucket::value_type* operator -> () const
{
return &*_buckIt;
return &*this->_buckIt;
}
BasicIterator& operator ++ () // prefix
Iterator& operator ++ () // prefix
{
if (_vecIt != _endIt)
{
++_buckIt;
while (_vecIt != _endIt && _buckIt == _vecIt->end())
{
++_vecIt;
if (_vecIt != _endIt) _buckIt = _vecIt->begin();
}
}
ConstIterator::operator ++ ();
return *this;
}
BasicIterator operator ++ (int) // postfix
Iterator operator ++ (int) // postfix
{
BasicIterator tmp(*this);
Iterator tmp(*this);
++*this;
return tmp;
}
private:
VecIt _vecIt;
VecIt _endIt;
BuckIt _buckIt;
friend class LinearHashTable;
template <class, class> friend class BasicConstIterator;
};
typedef BasicIterator<typename BucketVec::iterator, typename Bucket::iterator> Iterator;
template <class VecIt, class BuckIt>
class BasicConstIterator
{
public:
BasicConstIterator()
{
}
BasicConstIterator(const VecIt& vecIt, const VecIt& endIt, const BuckIt& buckIt):
_vecIt(vecIt),
_endIt(endIt),
_buckIt(buckIt)
{
}
BasicConstIterator(const BasicConstIterator& it):
_vecIt(it._vecIt),
_endIt(it._endIt),
_buckIt(it._buckIt)
{
}
BasicConstIterator(const Iterator& it):
_vecIt(it._vecIt),
_endIt(it._endIt),
_buckIt(it._buckIt)
{
}
BasicConstIterator& operator = (const BasicConstIterator& it)
{
BasicConstIterator tmp(it);
swap(tmp);
return *this;
}
BasicConstIterator& operator = (const Iterator& it)
{
BasicConstIterator tmp(it);
swap(tmp);
return *this;
}
void swap(BasicConstIterator& it)
{
using std::swap;
swap(_vecIt, it._vecIt);
swap(_endIt, it._endIt);
swap(_buckIt, it._buckIt);
}
bool operator == (const BasicConstIterator& it) const
{
return _vecIt == it._vecIt && (_vecIt == _endIt || _buckIt == it._buckIt);
}
bool operator != (const BasicConstIterator& it) const
{
return _vecIt != it._vecIt || (_vecIt != _endIt && _buckIt != it._buckIt);
}
const typename Bucket::value_type& operator * () const
{
return *_buckIt;
}
const typename Bucket::value_type* operator -> () const
{
return &*_buckIt;
}
BasicConstIterator& operator ++ () // prefix
{
if (_vecIt != _endIt)
{
++_buckIt;
while (_vecIt != _endIt && _buckIt == _vecIt->end())
{
++_vecIt;
if (_vecIt != _endIt) _buckIt = _vecIt->begin();
}
}
return *this;
}
BasicConstIterator operator ++ (int) // postfix
{
BasicConstIterator tmp(*this);
++*this;
return tmp;
}
private:
VecIt _vecIt;
VecIt _endIt;
BuckIt _buckIt;
friend class LinearHashTable;
};
typedef BasicConstIterator<typename BucketVec::const_iterator, typename Bucket::const_iterator> ConstIterator;
LinearHashTable(std::size_t initialReserve = 64):
_split(0),
@@ -336,8 +284,8 @@ public:
ConstIterator begin() const
/// Returns an iterator pointing to the first entry, if one exists.
{
typename BucketVec::const_iterator it = _buckets.begin();
typename BucketVec::const_iterator end = _buckets.end();
BucketVecIterator it(_buckets.begin());
BucketVecIterator end(_buckets.end());
while (it != end && it->empty())
{
++it;
@@ -357,8 +305,8 @@ public:
Iterator begin()
/// Returns an iterator pointing to the first entry, if one exists.
{
typename BucketVec::iterator it = _buckets.begin();
typename BucketVec::iterator end = _buckets.end();
BucketVecIterator it(_buckets.begin());
BucketVecIterator end(_buckets.end());
while (it != end && it->empty())
{
++it;
@@ -379,8 +327,8 @@ public:
/// Finds an entry in the table.
{
std::size_t addr = bucketAddress(value);
typename BucketVec::const_iterator it = _buckets.begin() + addr;
typename Bucket::const_iterator buckIt = std::find(it->begin(), it->end(), value);
BucketVecIterator it(_buckets.begin() + addr);
BucketIterator buckIt(std::find(it->begin(), it->end(), value));
if (buckIt != it->end())
return ConstIterator(it, _buckets.end(), buckIt);
else
@@ -391,8 +339,8 @@ public:
/// Finds an entry in the table.
{
std::size_t addr = bucketAddress(value);
typename BucketVec::iterator it = _buckets.begin() + addr;
typename Bucket::iterator buckIt = std::find(it->begin(), it->end(), value);
BucketVecIterator it(_buckets.begin() + addr);
BucketIterator buckIt(std::find(it->begin(), it->end(), value));
if (buckIt != it->end())
return Iterator(it, _buckets.end(), buckIt);
else
@@ -418,8 +366,8 @@ public:
{
split();
std::size_t addr = bucketAddress(value);
typename BucketVec::iterator it = _buckets.begin() + addr;
typename Bucket::iterator buckIt = std::find(it->begin(), it->end(), value);
BucketVecIterator it(_buckets.begin() + addr);
BucketIterator buckIt(std::find(it->begin(), it->end(), value));
if (buckIt == it->end())
{
buckIt = it->insert(buckIt, value);
@@ -491,7 +439,7 @@ protected:
_buckets.push_back(tmp);
_buckets[_split].swap(tmp);
++_split;
for (typename Bucket::iterator it = tmp.begin(); it != tmp.end(); ++it)
for (BucketIterator it = tmp.begin(); it != tmp.end(); ++it)
{
using std::swap;
std::size_t addr = bucketAddress(*it);
@@ -511,7 +459,7 @@ protected:
Bucket tmp;
tmp.swap(_buckets.back());
_buckets.pop_back();
for (typename Bucket::iterator it = tmp.begin(); it != tmp.end(); ++it)
for (BucketIterator it = tmp.begin(); it != tmp.end(); ++it)
{
using std::swap;
std::size_t addr = bucketAddress(*it);
@@ -528,7 +476,9 @@ protected:
}
private:
BucketVec _buckets;
// Evil hack: _buckets must be mutable because both ConstIterator and Iterator hold
// ordinary iterator's (not const_iterator's).
mutable BucketVec _buckets;
std::size_t _split;
std::size_t _front;
std::size_t _size;