/////////////////////////////////////////////////////////////////////////////
-// 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 _WX_WXHASHH__
-#define _WX_WXHASHH__
+#ifndef _WX_HASH_H__
+#define _WX_HASH_H__
#ifdef __GNUG__
#pragma interface "hash.h"
#endif
-#include "wx/object.h"
#include "wx/list.h"
+// the default size of the hash
+#define wxHASH_SIZE_DEFAULT (1000)
+
/*
* A hash table is an array of user-definable size with lists
* of data items hanging off the array positions. Usually there'll
* 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:
- int n;
- int current_position;
- wxNode *current_node;
-
- unsigned int key_type;
- wxList **hash_table;
-
- wxHashTable(int the_key_type = wxKEY_INTEGER, int size = 1000);
- ~wxHashTable(void);
-
- // 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(void); // Robert Roebling
-
- bool Create(int the_key_type = wxKEY_INTEGER, int size = 1000);
-
- // 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(void);
- wxNode *Next(void);
-
- void DeleteContents(bool flag);
- void Clear(void);
-
- // 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;
+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;
+
+ // the array of lists in which we store the values for given key hash
+ wxListBase **m_hashTable;
+
+ // the size of m_lists array
+ size_t m_hashSize;
+
+ // the type of indexing we use
+ wxKeyType m_keyType;
+
+ // the total number of elements in the hash
+ size_t m_count;
+
+ // should we delete our data?
+ bool m_deleteContents;
+
+private:
+ // no copy ctor/assignment operator (yet)
+ DECLARE_NO_COPY_CLASS(wxHashTableBase);
};
+// ----------------------------------------------------------------------------
+// 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) \
+ class WXDLLEXPORT 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(key % 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++; \
+ } \
+ }
+
#endif
- // _WX_WXHASHH__
+ // _WX_HASH_H__
// Name: hash.cpp
// Purpose: wxHashTable implementation
// 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) Julian Smart and Markus Holzem
-// Licence: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
#ifdef __GNUG__
#pragma implementation "hash.h"
#endif
#include <string.h>
#include <stdarg.h>
+// ----------------------------------------------------------------------------
+// wxWin macros
+// ----------------------------------------------------------------------------
+
IMPLEMENT_DYNAMIC_CLASS(wxHashTable, wxObject)
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxHashTablleBase for working with "void *" data
+// ----------------------------------------------------------------------------
+
+wxHashTableBase::wxHashTableBase()
+{
+ m_deleteContents = FALSE;
+ m_hashTable = (wxListBase **)NULL;
+ m_hashSize = 0;
+ m_count = 0;
+ m_keyType = wxKEY_NONE;
+}
+
+void wxHashTableBase::Create(wxKeyType keyType, size_t size)
+{
+ Destroy();
+
+ m_hashSize = size;
+ m_keyType = keyType;
+ m_hashTable = new wxListBase *[size];
+ for ( size_t n = 0; n < m_hashSize; n++ )
+ {
+ m_hashTable[n] = (wxListBase *) NULL;
+ }
+}
+
+void wxHashTableBase::Destroy()
+{
+ if ( m_hashTable )
+ {
+ for ( size_t n = 0; n < m_hashSize; n++ )
+ {
+ delete m_hashTable[n];
+ }
+
+ delete [] m_hashTable;
+
+ m_hashTable = (wxListBase **)NULL;
+
+ m_count = 0;
+ }
+}
+
+void wxHashTableBase::DeleteContents(bool flag)
+{
+ m_deleteContents = flag;
+ for ( size_t n = 0; n < m_hashSize; n++ )
+ {
+ if ( m_hashTable[n] )
+ {
+ m_hashTable[n]->DeleteContents(flag);
+ }
+ }
+}
+
+wxNodeBase *wxHashTableBase::GetNode(long key, long value) const
+{
+ size_t slot = (size_t)abs(key % m_hashSize);
+
+ wxNodeBase *node;
+ if ( m_hashTable[slot] )
+ {
+ node = m_hashTable[slot]->Find(wxListKey(value));
+ }
+ else
+ {
+ node = (wxNodeBase *)NULL;
+ }
+
+ return node;
+}
+
+// ----------------------------------------------------------------------------
+// old not type safe wxHashTable
+// ----------------------------------------------------------------------------
+
wxHashTable::wxHashTable (int the_key_type, int size)
{
n = 0;
*/
}
-wxHashTable::~wxHashTable (void)
+wxHashTable::~wxHashTable ()
{
Destroy();
}
-void wxHashTable::Destroy(void)
+void wxHashTable::Destroy()
{
if (!hash_table) return;
int i;
void wxHashTable::Put (long key, const wxChar *value, wxObject * object)
{
// Should NEVER be
- long k = (long) key;
+ long k = (long) key;
int position = (int) (k % n);
if (position < 0) position = -position;
-
+
if (!hash_table[position])
{
hash_table[position] = new wxList (wxKEY_INTEGER);
{
// Should NEVER be
long k = (long) key;
-
+
int position = (int) (k % n);
if (position < 0) position = -position;
hash_table[position] = new wxList (wxKEY_INTEGER);
if (m_deleteContents) hash_table[position]->DeleteContents(TRUE);
}
-
+
hash_table[position]->Append (k, object);
m_count++;
}
{
wxNode *node = hash_table[position]->Find (value);
if (node)
- return node->Data ();
+ return node->Data ();
else
- return (wxObject *) NULL;
+ return (wxObject *) NULL;
}
}
{
// Should NEVER be
long k = (long) key;
-
+
int position = (int) (k % n);
if (position < 0) position = -position;
{
wxNode *node = hash_table[position]->Find (value);
if (node)
- return node->Data ();
+ return node->Data ();
else
- return (wxObject *) NULL;
+ return (wxObject *) NULL;
}
}
{
wxNode *node = hash_table[position]->Find (k);
if (node)
- {
- wxObject *data = node->Data ();
- delete node;
- m_count--;
- return data;
- }
+ {
+ wxObject *data = node->Data ();
+ delete node;
+ m_count--;
+ return data;
+ }
else
- return (wxObject *) NULL;
+ return (wxObject *) NULL;
}
}
{
wxNode *node = hash_table[position]->Find (key);
if (node)
- {
- wxObject *data = node->Data ();
- delete node;
- m_count--;
- return data;
- }
+ {
+ wxObject *data = node->Data ();
+ delete node;
+ m_count--;
+ return data;
+ }
else
- return (wxObject *) NULL;
+ return (wxObject *) NULL;
}
}
wxObject *wxHashTable::Delete (long key, int value)
{
// Should NEVER be
- long k = (long) key;
+ long k = (long) key;
int position = (int) (k % n);
if (position < 0) position = -position;
{
wxNode *node = hash_table[position]->Find (value);
if (node)
- {
- wxObject *data = node->Data ();
- delete node;
- m_count--;
- return data;
- }
+ {
+ wxObject *data = node->Data ();
+ delete node;
+ m_count--;
+ return data;
+ }
else
- return (wxObject *) NULL;
+ return (wxObject *) NULL;
}
}
{
wxNode *node = hash_table[position]->Find (value);
if (node)
- {
- wxObject *data = node->Data ();
- delete node;
- m_count--;
- return data;
- }
+ {
+ wxObject *data = node->Data ();
+ delete node;
+ m_count--;
+ return data;
+ }
else
- return (wxObject *) NULL;
+ return (wxObject *) NULL;
}
}
return int_key;
}
-void wxHashTable::BeginFind (void)
+void wxHashTable::BeginFind ()
{
current_position = -1;
current_node = (wxNode *) NULL;
}
-wxNode *wxHashTable::Next (void)
+wxNode *wxHashTable::Next ()
{
wxNode *found = (wxNode *) NULL;
bool end = FALSE;
while (!end && !found)
{
if (!current_node)
- {
- current_position++;
- if (current_position >= n)
- {
- current_position = -1;
- current_node = (wxNode *) NULL;
- end = TRUE;
- }
- else
- {
- if (hash_table[current_position])
- {
- current_node = hash_table[current_position]->First ();
- found = current_node;
- }
- }
- }
+ {
+ current_position++;
+ if (current_position >= n)
+ {
+ current_position = -1;
+ current_node = (wxNode *) NULL;
+ end = TRUE;
+ }
+ else
+ {
+ if (hash_table[current_position])
+ {
+ current_node = hash_table[current_position]->First ();
+ found = current_node;
+ }
+ }
+ }
else
- {
- current_node = current_node->Next ();
- found = current_node;
- }
+ {
+ current_node = current_node->Next ();
+ found = current_node;
+ }
}
return found;
}
for (i = 0; i < n; i++)
{
if (hash_table[i])
- hash_table[i]->DeleteContents (flag);
+ hash_table[i]->DeleteContents (flag);
}
}
-void wxHashTable::Clear (void)
+void wxHashTable::Clear ()
{
int i;
for (i = 0; i < n; i++)
{
if (hash_table[i])
- hash_table[i]->Clear ();
+ hash_table[i]->Clear ();
}
m_count = 0;
}
projects / wxWidgets.git / commitdiff
