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/*
* CENA C++ Utilities
*
* by Stephane Chatty
*
* Copyright 1991, 1992
* Laboratoire de Recherche en Informatique (LRI)
* Centre d'Etudes de la Navigation Aerienne (CENA)
*
* plain and generic hash tables and dictionnaries
* (Original C version by Michel Beaudouin-Lafon)
*
* $Id$
* $CurLog$
*/
#ifndef HashTable_H_
#define HashTable_H_
#include "cplus_bugs.h"
class CcuAllocator;
typedef void CcuHashItem;
class CcuHashCell {
protected:
friend class CcuHashTable;
friend class CcuHashCellIter;
static CcuAllocator* HashCellMem;
static void ClassInit ();
const void* Key; /* hash key */
CcuHashItem* Info; /* data */
CcuHashCell* Next; /* synonyms */
inline CcuHashCell (const void* k, CcuHashCell* n) : Key (k), Info (0), Next (n) {}
public:
inline void SetInfo (CcuHashItem* p) { Info = p; }
inline CcuHashItem* GetInfo () const { return Info; }
inline const void* GetKey () const { return Key; }
void* operator new (unsigned long);
void operator delete (void*);
};
class CcuHashCellRef {
friend class CcuHashTable;
protected:
const CcuHashTable& Table;
const void* Key;
inline CcuHashCellRef (const CcuHashTable& t, const void* key) : Table (t), Key (key) {}
#ifdef CPLUS_BUG1
inline CcuHashCellRef (const CcuHashCellRef& t) : Table (t.Table), Key (t.Key) {}
#endif
public:
CcuHashItem* operator = (CcuHashItem*);
operator CcuHashItem* ();
};
typedef unsigned int (*HASH_F) (const void*, int);
typedef int (*HCMP_F) (const void*, const void*);
typedef void* (*HCP_F) (const void*);
typedef void (*HDEL_F) (const void*);
class CcuHashTable {
private:
friend class CcuHashCellIter;
friend class CcuHashCellRef;
protected :
CcuHashCell** Table;
unsigned int Size;
HASH_F Hash;
HCP_F Copy;
HDEL_F Delete;
HCMP_F Compare;
CcuHashCell** HashKey (const void*) const;
CcuHashCell* FindCell (CcuHashCell**, const void*) const;
CcuHashCell* AddCell (CcuHashCell**, const void*) const;
public:
static unsigned int HashPtr (const void*, int);
CcuHashTable (unsigned int, HASH_F = 0, HCP_F = 0, HDEL_F = 0, HCMP_F = 0);
CcuHashTable (const CcuHashTable&);
~CcuHashTable ();
CcuHashCell* Add (const void*, int* = 0);
CcuHashCell* Get (const void*);
CcuHashItem* Remove (const void*, int* = 0);
void Clear ();
void Resize (int);
inline int GetSize () const { return Size; }
CcuHashCellRef operator [] (const void*) const;
#ifdef TUNE
void HashStats ();
void CollStats ();
#endif
};
class CcuDictionnary : public CcuHashTable {
protected:
static void* CopyString (const void*);
static void DeleteString (void*);
static int CompareString (const void*, const void*);
public:
CcuDictionnary (int size, HASH_F = 0);
~CcuDictionnary ();
void KeyCopy (int);
static unsigned int HashString (const void*, int);
};
class CcuHashCellIter {
public:
enum hashiter_status { Normal, StartOfTable, EndOfTable, BadTable };
protected:
const CcuHashTable& TheTable;
int CurIndex;
CcuHashCell* CurCell;
public:
inline CcuHashCellIter (const CcuHashTable& t) : TheTable (t) { CurIndex = -1; CurCell = 0; }
inline ~CcuHashCellIter () {}
inline void Reset () { CurCell = 0; CurIndex = -1; }
CcuHashCellIter& operator ++ ();
#ifndef CPLUS_BUG16
CcuHashCellIter operator ++ (int);
#endif
inline CcuHashCell* operator * () const { return CurCell; }
hashiter_status GetStatus () const;
inline operator int () const { return CurCell != 0; }
};
class CcuHashIter : public CcuHashCellIter {
public:
inline CcuHashIter (const CcuHashTable& t) : CcuHashCellIter (t) { }
inline ~CcuHashIter () {}
inline CcuHashIter& operator ++ () { ++((CcuHashCellIter) (*this)); return *this; }
inline CcuHashItem* operator * () const { return CurCell ? CurCell->GetInfo () : 0; }
};
#ifndef CPLUS_BUG19
template <class ITEM> class CcuHashTableOf;
template <class ITEM> class CcuDictionnaryOf;
template <class ITEM> class CcuHashCellOf : public CcuHashCell {
protected:
inline CcuHashCellOf (const void* k, CcuHashCellOf<ITEM>* n) : CcuHashCell (k, n) {}
public:
inline void SetInfo (ITEM* p) { CcuHashCell::SetInfo (p); }
inline ITEM* GetInfo () const { return (ITEM*) CcuHashCell::GetInfo (); }
};
template <class ITEM> class CcuHashCellRefOf : public CcuHashCellRef {
friend class CcuHashTableOf<ITEM>;
friend class CcuDictionnaryOf<ITEM>;
protected:
inline CcuHashCellRefOf (const CcuHashTableOf<ITEM>& t, const void* key) : CcuHashCellRef (t, key) {}
#ifdef CPLUS_BUG1
inline CcuHashCellRefOf (const CcuHashCellRefOf<ITEM>& t) : CcuHashCellRef (t) {}
#endif
public:
inline ITEM* operator = (ITEM* it) { return (ITEM*) (CcuHashCellRef::operator = (it)); }
inline operator ITEM* () { return (ITEM*) (CcuHashCellRef::operator CcuHashItem* ()); }
};
template <class ITEM> class CcuHashTableOf : public CcuHashTable {
public:
inline CcuHashTableOf (unsigned int size, HASH_F hash = 0, HCP_F cp = 0, HDEL_F del = 0, HCMP_F cmp= 0)
: CcuHashTable (size, hash, cp, del, cmp) {}
inline ~CcuHashTableOf () {}
inline CcuHashCellOf<ITEM>* Add (const void* key, int* found = 0) { return (CcuHashCellOf<ITEM>*) CcuHashTable::Add (key, found); }
inline CcuHashCellOf<ITEM>* Get (const void* key) { return (CcuHashCellOf<ITEM>*) CcuHashTable::Get (key); }
inline ITEM* Remove (const void* key, int* found = 0) { return (ITEM*) CcuHashTable::Remove (key, found); }
inline CcuHashCellRefOf<ITEM> operator [] (const void* key) const { return CcuHashCellRefOf<ITEM> (*this, key); }
};
template <class ITEM> class CcuDictionnaryOf : public CcuDictionnary {
public:
inline CcuDictionnaryOf (unsigned int size, HASH_F hash = 0) : CcuDictionnary (size, hash) {}
inline ~CcuDictionnaryOf () {}
inline CcuHashCellOf<ITEM>* Add (const void* key, int* found = 0) { return (CcuHashCellOf<ITEM>*) CcuDictionnary::Add (key, found); }
inline CcuHashCellOf<ITEM>* Get (const void* key) { return (CcuHashCellOf<ITEM>*) CcuDictionnary::Get (key); }
inline ITEM* Remove (const void* key, int* found = 0) { return (ITEM*) CcuDictionnary::Remove (key, found); }
inline operator const CcuHashTableOf<ITEM>& () const { return *(const CcuHashTableOf<ITEM>*) this; }
inline CcuHashCellRefOf<ITEM> operator [] (const char* key) const { return CcuHashCellRefOf<ITEM> (*(const CcuHashTableOf<ITEM>*)this, key); }
};
template <class ITEM> class CcuHashIterOf : public CcuHashIter {
public:
inline CcuHashIterOf (const CcuHashTableOf<ITEM>& t) : CcuHashIter (t) { }
inline ~CcuHashIterOf () {}
inline CcuHashIterOf<ITEM>& operator ++ () { ++((CcuHashIter) (*this)); return *this; }
inline ITEM* operator * () const { return (ITEM*) (CcuHashIter::operator * ()); }
};
#endif /* CPLUS_BUG19 */
#endif /* HashTable_H_ */
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