X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/debe6624c1e9d4bf3243381153d1e173c849bcd8..71b9ed15f5f00a897f1e4048aad15f7df36ea41c:/include/wx/hash.h diff --git a/include/wx/hash.h b/include/wx/hash.h index a1ae912a67..575216d21c 100644 --- a/include/wx/hash.h +++ b/include/wx/hash.h @@ -1,23 +1,26 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: hash.h +// Name: wx/hash.h // Purpose: wxHashTable class // Author: Julian Smart -// Modified by: +// Modified by: VZ at 25.02.00: type safe hashes with WX_DECLARE_HASH() // Created: 01/02/97 // RCS-ID: $Id$ // Copyright: (c) -// Licence: wxWindows licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifndef __WXHASHH__ -#define __WXHASHH__ +#ifndef _WX_HASH_H__ +#define _WX_HASH_H__ #ifdef __GNUG__ #pragma interface "hash.h" #endif -#include "wx/object.h" #include "wx/list.h" +#include "wx/dynarray.h" + +// the default size of the hash +#define wxHASH_SIZE_DEFAULT (1000) /* * A hash table is an array of user-definable size with lists @@ -26,73 +29,273 @@ * the list to find the desired item. */ -class WXDLLEXPORT wxHashTable: public wxObject +// ---------------------------------------------------------------------------- +// this is the base class for object hashes: hash tables which contain +// pointers to objects +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT wxHashTableBase : public wxObject { - DECLARE_DYNAMIC_CLASS(wxHashTable) +public: + wxHashTableBase(); + + void Create(wxKeyType keyType = wxKEY_INTEGER, + size_t size = wxHASH_SIZE_DEFAULT); + void Destroy(); + + size_t GetSize() const { return m_hashSize; } + size_t GetCount() const { return m_count; } + + void DeleteContents(bool flag); + +protected: + // find the node for (key, value) + wxNodeBase *GetNode(long key, long value) const; - public: - int n; - int current_position; - wxNode *current_node; + // the array of lists in which we store the values for given key hash + wxListBase **m_hashTable; - unsigned int key_type; - wxList **hash_table; + // the size of m_lists array + size_t m_hashSize; - wxHashTable(int the_key_type = wxKEY_INTEGER, int size = 1000); - ~wxHashTable(void); + // the type of indexing we use + wxKeyType m_keyType; - bool Create(int the_key_type = wxKEY_INTEGER, int size = 1000); + // the total number of elements in the hash + size_t m_count; - // Note that there are 2 forms of Put, Get. - // With a key and a value, the *value* will be checked - // when a collision is detected. Otherwise, if there are - // 2 items with a different value but the same key, - // we'll retrieve the WRONG ONE. So where possible, - // supply the required value along with the key. - // In fact, the value-only versions make a key, and still store - // the value. The use of an explicit key might be required - // e.g. when combining several values into one key. - // When doing that, it's highly likely we'll get a collision, - // e.g. 1 + 2 = 3, 2 + 1 = 3. + // should we delete our data? + bool m_deleteContents; - // key and value are NOT necessarily the same - void Put(long key, long value, wxObject *object); - void Put(long key, const char *value, wxObject *object); +private: + // no copy ctor/assignment operator (yet) + DECLARE_NO_COPY_CLASS(wxHashTableBase); +}; - // key and value are the same - void Put(long value, wxObject *object); - void Put(const char *value, wxObject *object); +// ---------------------------------------------------------------------------- +// a hash table which stores longs +// ---------------------------------------------------------------------------- - // key and value not the same - wxObject *Get(long key, long value) const; - wxObject *Get(long key, const char *value) const; +class WXDLLEXPORT wxHashTableLong : public wxObject +{ +public: + wxHashTableLong(size_t size = wxHASH_SIZE_DEFAULT) { Init(size); } + virtual ~wxHashTableLong(); - // key and value are the same - wxObject *Get(long value) const; - wxObject *Get(const char *value) const; + void Create(size_t size = wxHASH_SIZE_DEFAULT); + void Destroy(); - // Deletes entry and returns data if found - wxObject *Delete(long key); - wxObject *Delete(const char *key); + size_t GetSize() const { return m_hashSize; } + size_t GetCount() const { return m_count; } - wxObject *Delete(long key, int value); - wxObject *Delete(long key, const char *value); + void Put(long key, long value); + long Get(long key) const; + long Delete(long key); - // Construct your own integer key from a string, e.g. in case - // you need to combine it with something - long MakeKey(const char *string) const; +protected: + void Init(size_t size); - // Way of iterating through whole hash table (e.g. to delete everything) - // Not necessary, of course, if you're only storing pointers to - // objects maintained separately +private: + wxArrayLong **m_values, + **m_keys; - void BeginFind(void); - wxNode *Next(void); + // the size of array above + size_t m_hashSize; - void DeleteContents(bool flag); - void Clear(void); + // the total number of elements in the hash + size_t m_count; + // not implemented yet + DECLARE_NO_COPY_CLASS(wxHashTableLong); }; +// ---------------------------------------------------------------------------- +// wxStringHashTable: a hash table which indexes strings with longs +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT wxStringHashTable : public wxObject +{ +public: + wxStringHashTable(size_t sizeTable = wxHASH_SIZE_DEFAULT); + virtual ~wxStringHashTable(); + + // add a string associated with this key to the table + void Put(long key, const wxString& value); + + // get the string from the key: if not found, an empty string is returned + // and the wasFound is set to FALSE if not NULL + wxString Get(long key, bool *wasFound = NULL) const; + + // clean up + void Destroy(); + +private: + wxArrayLong **m_keys; + wxArrayString **m_values; + + // the size of array above + size_t m_hashSize; + + DECLARE_NO_COPY_CLASS(wxStringHashTable); +}; + +// ---------------------------------------------------------------------------- +// for compatibility only +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT wxHashTable : public wxObject +{ +public: + int n; + int current_position; + wxNode *current_node; + + unsigned int key_type; + wxList **hash_table; + + wxHashTable(int the_key_type = wxKEY_INTEGER, + int size = wxHASH_SIZE_DEFAULT); + ~wxHashTable(); + + // copy ctor and assignment operator + wxHashTable(const wxHashTable& table) { DoCopy(table); } + wxHashTable& operator=(const wxHashTable& table) + { Clear(); DoCopy(table); return *this; } + + void DoCopy(const wxHashTable& table); + + void Destroy(); + + bool Create(int the_key_type = wxKEY_INTEGER, + int size = wxHASH_SIZE_DEFAULT); + + // Note that there are 2 forms of Put, Get. + // With a key and a value, the *value* will be checked + // when a collision is detected. Otherwise, if there are + // 2 items with a different value but the same key, + // we'll retrieve the WRONG ONE. So where possible, + // supply the required value along with the key. + // In fact, the value-only versions make a key, and still store + // the value. The use of an explicit key might be required + // e.g. when combining several values into one key. + // When doing that, it's highly likely we'll get a collision, + // e.g. 1 + 2 = 3, 2 + 1 = 3. + + // key and value are NOT necessarily the same + void Put(long key, long value, wxObject *object); + void Put(long key, const wxChar *value, wxObject *object); + + // key and value are the same + void Put(long value, wxObject *object); + void Put(const wxChar *value, wxObject *object); + + // key and value not the same + wxObject *Get(long key, long value) const; + wxObject *Get(long key, const wxChar *value) const; + + // key and value are the same + wxObject *Get(long value) const; + wxObject *Get(const wxChar *value) const; + + // Deletes entry and returns data if found + wxObject *Delete(long key); + wxObject *Delete(const wxChar *key); + + wxObject *Delete(long key, int value); + wxObject *Delete(long key, const wxChar *value); + + // Construct your own integer key from a string, e.g. in case + // you need to combine it with something + long MakeKey(const wxChar *string) const; + + // Way of iterating through whole hash table (e.g. to delete everything) + // Not necessary, of course, if you're only storing pointers to + // objects maintained separately + + void BeginFind(); + wxNode *Next(); + + void DeleteContents(bool flag); + void Clear(); + + // Returns number of nodes + size_t GetCount() const { return m_count; } + +private: + size_t m_count; // number of elements in the hashtable + bool m_deleteContents; + + DECLARE_DYNAMIC_CLASS(wxHashTable) +}; + +// defines a new type safe hash table which stores the elements of type eltype +// in lists of class listclass +#define _WX_DECLARE_HASH(eltype, listclass, hashclass, classexp) \ + classexp hashclass : public wxHashTableBase \ + { \ + public: \ + hashclass(wxKeyType keyType = wxKEY_INTEGER, \ + size_t size = wxHASH_SIZE_DEFAULT) \ + { Create(keyType, size); } \ + \ + ~hashclass() { Destroy(); } \ + \ + void Put(long key, long val, eltype *data) { DoPut(key, val, data); } \ + void Put(long key, eltype *data) { DoPut(key, key, data); } \ + \ + eltype *Get(long key, long value) const \ + { \ + wxNodeBase *node = GetNode(key, value); \ + return node ? ((listclass::Node *)node)->GetData() : (eltype *)0; \ + } \ + eltype *Get(long key) const { return Get(key, key); } \ + \ + eltype *Delete(long key, long value) \ + { \ + eltype *data; \ + \ + wxNodeBase *node = GetNode(key, value); \ + if ( node ) \ + { \ + data = ((listclass::Node *)node)->GetData(); \ + \ + delete node; \ + m_count--; \ + } \ + else \ + { \ + data = (eltype *)0; \ + } \ + \ + return data; \ + } \ + eltype *Delete(long key) { return Delete(key, key); } \ + \ + protected: \ + void DoPut(long key, long value, eltype *data) \ + { \ + size_t slot = (size_t)abs((int)(key % (long)m_hashSize)); \ + \ + if ( !m_hashTable[slot] ) \ + { \ + m_hashTable[slot] = new listclass(m_keyType); \ + if ( m_deleteContents ) \ + m_hashTable[slot]->DeleteContents(TRUE); \ + } \ + \ + ((listclass *)m_hashTable[slot])->Append(value, data); \ + m_count++; \ + } \ + } + +// this macro is to be used in the user code +#define WX_DECLARE_HASH(el, list, hash) \ + _WX_DECLARE_HASH(el, list, hash, class) + +// and this one does exactly the same thing but should be used inside the +// library +#define WX_DECLARE_EXPORTED_HASH(el, list, hash) \ + _WX_DECLARE_HASH(el, list, hash, class WXDLLEXPORT) + #endif - // __WXHASHH__ + // _WX_HASH_H__