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////////////////////////////////////////////////////////////////////////////////
//
// PlainHashMap.hh
// produced: 01/09/97 jr
// last change: 24/01/99 jr
//
////////////////////////////////////////////////////////////////////////////////
#ifndef PLAINHASHMAP_HH
#define PLAINHASHMAP_HH
#include <stdlib.h>
#include <iostream>
#include <ctype.h>
#include <string.h>
#include "Global.hh"
#include "RefCount.hh"
#include "PlainHashTable.hh"
namespace topcom {
template<class Key, class Data>
class HashMapData;
template<class Key, class Data>
class __hmd_reader;
template<class Key, class Data>
inline std::istream& operator>>(std::istream& ist, __hmd_reader<Key, Data>& r);
template<class Key, class Data>
inline std::ostream& operator<<(std::ostream& ost, const HashMapData<Key, Data>& hmd);
template<class Key, class Data>
class __hmd_reader {
public:
Key key;
Data data;
public:
friend std::istream& operator>><>(std::istream& ist, __hmd_reader& r);
};
template<class Key, class Data>
class HashMapData {
public:
typedef Key key_type;
typedef Data data_type;
typedef SmartPtr<Key> keyptr_type;
typedef SmartPtr<const Key> const_keyptr_type;
typedef SmartPtr<Data> dataptr_type;
typedef SmartPtr<const Data> const_dataptr_type;
typedef __hmd_reader<Key, Data> reader;
private:
const const_keyptr_type _keyptr;
dataptr_type _dataptr;
public:
static data_type default_data;
static dataptr_type null;
public:
// constructors:
inline HashMapData() : _keyptr(), _dataptr() {}
inline HashMapData(const HashMapData& hmd) : _keyptr(hmd._keyptr), _dataptr(hmd._dataptr) {}
inline HashMapData(const Key& new_key, const Data& new_data) : _keyptr(new_key), _dataptr(new_data) {}
inline HashMapData(const reader& r) : _keyptr(r.key), _dataptr(r.data) {}
// destructor:
inline ~HashMapData() {}
private:
// assignment:
inline HashMapData& operator=(const HashMapData& hmd) {
if (this == &hmd) {
return *this;
}
(keyptr_type)_keyptr = hmd._keyptr;
_dataptr = hmd._dataptr;
return *this;
}
public:
// accessors:
inline const const_keyptr_type& keyptr() const { return _keyptr; }
inline const dataptr_type& dataptr() const { return _dataptr; }
inline dataptr_type& dataptr() { return _dataptr; }
inline const Key& key() const { return *_keyptr; }
inline const Data& data() const { return *_dataptr; }
inline Data& data() { return *_dataptr; }
// comparison:
inline const bool operator==(const HashMapData<Key, Data>& hmd) const {
return (key() == hmd.key()) && (data() == hmd.data());
}
inline const bool operator!=(const HashMapData<Key, Data>& hmd) const {
return !((key() == hmd.key()) && (data() == hmd.data()));
}
// iostream:
inline std::ostream& write(std::ostream& ost) const {
return ost << *_keyptr << "->" << *_dataptr;
}
friend std::ostream& operator<<<>(std::ostream& ost, const HashMapData<Key, Data>& hmd);
};
template<class Key, class Data>
class PlainHashMap : public PlainHashTable< HashMapData<Key, Data> > {
public:
typedef PlainHashTable< HashMapData<Key, Data> > plainhashmap_data;
typedef typename HashMapData<Key, Data>::keyptr_type keyptr_type;
typedef typename HashMapData<Key, Data>::const_keyptr_type const_keyptr_type;
typedef typename HashMapData<Key, Data>::dataptr_type dataptr_type;
typedef typename HashMapData<Key, Data>::const_dataptr_type const_dataptr_type;
public:
// constructors:
inline PlainHashMap() : plainhashmap_data() {}
inline PlainHashMap(const PlainHashMap& phm) : plainhashmap_data(phm) {}
inline PlainHashMap(const plainhashmap_data& phmd) : plainhashmap_data(phmd) {}
inline PlainHashMap(const size_type init_bucket_count) : plainhashmap_data(init_bucket_count) {}
// destructor:
inline ~PlainHashMap() {}
// assignment:
inline PlainHashMap& operator=(const PlainHashMap& phm) {
plainhashmap_data::operator=(phm);
return *this;
}
// functions:
inline const dataptr_type& member(const Key& key) const {
const HashMapData<Key, Data>* hashptr(plainhashmap_data::member(key));
if (hashptr) return hashptr->dataptr();
else return HashMapData<Key, Data>::null;
}
inline dataptr_type& member(const Key& key) {
HashMapData<Key, Data>* hashptr(plainhashmap_data::member(key));
if (hashptr) return hashptr->dataptr();
else return HashMapData<Key, Data>::null;
}
inline dataptr_type& insert(const Key& new_key, const Data& new_data) {
return plainhashmap_data::insert(HashMapData<Key, Data>(new_key, new_data))->dataptr();
}
inline dataptr_type& overwrite(const Key& new_key, const Data& new_data) {
dataptr_type& dataptr =
plainhashmap_data::insert(HashMapData<Key, Data>(new_key, HashMapData<Key, Data>::default_data))->dataptr();
*dataptr = new_data;
return dataptr;
}
inline const Data& operator[](const Key& key) const {
return *member(key);
}
inline Data& operator[](const Key& key) {
return *insert(key, HashMapData<Key, Data>::default_data);
}
};
template<class Key, class Data>
typename HashMapData<Key, Data>::data_type HashMapData<Key, Data>::default_data;
template<class Key, class Data>
typename HashMapData<Key, Data>::dataptr_type HashMapData<Key, Data>::null;
// friends:
template<class Key, class Data>
inline std::istream& operator>>(std::istream& ist, __hmd_reader<Key, Data>& r) {
char dash;
char arrow;
if (!(ist >> std::ws >> r.key)) {
#ifdef READ_DEBUG
std::cerr << "std::istream& operator>>(std::istream&, HashMapData<Key, Data>::reader&): "
<< "key not found." << std::endl;
#endif
ist.clear(std::ios::failbit);
return ist;
}
if (!(ist >> std::ws >> dash >> arrow)) {
#ifdef READ_DEBUG
std::cerr << "std::istream& operator>>(std::istream&, HashMapData<Key, Data>::reader&): "
<< "`->' not found." << std::endl;
#endif
ist.clear(std::ios::failbit);
return ist;
}
if (!(ist >> std::ws >> r.data)) {
#ifdef READ_DEBUG
std::cerr << "std::istream& operator>>(std::istream&, HashMapData<Key, Data>::reader&): "
<< "data not found." << std::endl;
#endif
ist.clear(std::ios::failbit);
return ist;
}
return ist;
}
template<class Key, class Data>
inline std::ostream& operator<<(std::ostream& ost, const HashMapData<Key, Data>& hmd) {
return hmd.write(ost);
}
}; // namespace topcom
#endif
// eof PlainHashMap.hh
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