// 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((int)(key % (long)m_hashSize));
+
+ wxNodeBase *node;
+ if ( m_hashTable[slot] )
+ {
+ node = m_hashTable[slot]->Find(wxListKey(value));
+ }
+ else
+ {
+ node = (wxNodeBase *)NULL;
+ }
+
+ return node;
+}
+
+// ----------------------------------------------------------------------------
+// wxHashTableLong
+// ----------------------------------------------------------------------------
+
+wxHashTableLong::~wxHashTableLong()
+{
+ Destroy();
+}
+
+void wxHashTableLong::Init(size_t size)
+{
+ m_hashSize = size;
+ m_values = new wxArrayLong *[size];
+ m_keys = new wxArrayLong *[size];
+
+ for ( size_t n = 0; n < m_hashSize; n++ )
+ {
+ m_values[n] =
+ m_keys[n] = (wxArrayLong *)NULL;
+ }
+
+ m_count = 0;
+}
+
+void wxHashTableLong::Create(size_t size)
+{
+ Init(size);
+}
+
+void wxHashTableLong::Destroy()
+{
+ for ( size_t n = 0; n < m_hashSize; n++ )
+ {
+ delete m_values[n];
+ delete m_keys[n];
+ }
+
+ delete [] m_values;
+ delete [] m_keys;
+ m_hashSize = 0;
+ m_count = 0;
+}
+
+void wxHashTableLong::Put(long key, long value)
+{
+ wxCHECK_RET( m_hashSize, _T("must call Create() first") );
+
+ size_t slot = (size_t)abs((int)(key % (long)m_hashSize));
+
+ if ( !m_keys[slot] )
+ {
+ m_keys[slot] = new wxArrayLong;
+ m_values[slot] = new wxArrayLong;
+ }
+
+ m_keys[slot]->Add(key);
+ m_values[slot]->Add(value);
+
+ m_count++;
+}
+
+long wxHashTableLong::Get(long key) const
+{
+ wxCHECK_MSG( m_hashSize, wxNOT_FOUND, _T("must call Create() first") );
+
+ size_t slot = (size_t)abs((int)(key % (long)m_hashSize));
+
+ wxArrayLong *keys = m_keys[slot];
+ if ( keys )
+ {
+ size_t count = keys->GetCount();
+ for ( size_t n = 0; n < count; n++ )
+ {
+ if ( keys->Item(n) == key )
+ {
+ return m_values[slot]->Item(n);
+ }
+ }
+ }
+
+ return wxNOT_FOUND;
+}
+
+long wxHashTableLong::Delete(long key)
+{
+ wxCHECK_MSG( m_hashSize, wxNOT_FOUND, _T("must call Create() first") );
+
+ size_t slot = (size_t)abs((int)(key % (long)m_hashSize));
+
+ wxArrayLong *keys = m_keys[slot];
+ if ( keys )
+ {
+ size_t count = keys->GetCount();
+ for ( size_t n = 0; n < count; n++ )
+ {
+ if ( keys->Item(n) == key )
+ {
+ long val = m_values[slot]->Item(n);
+
+ keys->RemoveAt(n);
+ m_values[slot]->RemoveAt(n);
+
+ m_count--;
+
+ return val;
+ }
+ }
+ }
+
+ return wxNOT_FOUND;
+}
+
+// ----------------------------------------------------------------------------
+// wxStringHashTable: more efficient than storing strings in a list
+// ----------------------------------------------------------------------------
+
+wxStringHashTable::wxStringHashTable(size_t sizeTable)
+{
+ m_keys = new wxArrayLong *[sizeTable];
+ m_values = new wxArrayString *[sizeTable];
+
+ m_hashSize = sizeTable;
+ for ( size_t n = 0; n < m_hashSize; n++ )
+ {
+ m_values[n] = (wxArrayString *)NULL;
+ m_keys[n] = (wxArrayLong *)NULL;
+ }
+}
+
+wxStringHashTable::~wxStringHashTable()
+{
+ Destroy();
+}
+
+void wxStringHashTable::Destroy()
+{
+ for ( size_t n = 0; n < m_hashSize; n++ )
+ {
+ delete m_values[n];
+ delete m_keys[n];
+ }
+
+ delete [] m_values;
+ delete [] m_keys;
+ m_hashSize = 0;
+}
+
+void wxStringHashTable::Put(long key, const wxString& value)
+{
+ wxCHECK_RET( m_hashSize, _T("must call Create() first") );
+
+ size_t slot = (size_t)abs((int)(key % (long)m_hashSize));
+
+ if ( !m_keys[slot] )
+ {
+ m_keys[slot] = new wxArrayLong;
+ m_values[slot] = new wxArrayString;
+ }
+
+ m_keys[slot]->Add(key);
+ m_values[slot]->Add(value);
+}
+
+wxString wxStringHashTable::Get(long key, bool *wasFound) const
+{
+ wxCHECK_MSG( m_hashSize, _T(""), _T("must call Create() first") );
+
+ size_t slot = (size_t)abs((int)(key % (long)m_hashSize));
+
+ wxArrayLong *keys = m_keys[slot];
+ if ( keys )
+ {
+ size_t count = keys->GetCount();
+ for ( size_t n = 0; n < count; n++ )
+ {
+ if ( keys->Item(n) == key )
+ {
+ if ( wasFound )
+ *wasFound = TRUE;
+
+ return m_values[slot]->Item(n);
+ }
+ }
+ }
+
+ if ( wasFound )
+ *wasFound = FALSE;
+
+ return _T("");
+}
+
+bool wxStringHashTable::Delete(long key) const
+{
+ wxCHECK_MSG( m_hashSize, FALSE, _T("must call Create() first") );
+
+ size_t slot = (size_t)abs((int)(key % (long)m_hashSize));
+
+ wxArrayLong *keys = m_keys[slot];
+ if ( keys )
+ {
+ size_t count = keys->GetCount();
+ for ( size_t n = 0; n < count; n++ )
+ {
+ if ( keys->Item(n) == key )
+ {
+ keys->RemoveAt(n);
+ m_values[slot]->RemoveAt(n);
+ return TRUE;
+ }
+ }
+ }
+
+ return FALSE;
+}
+
+// ----------------------------------------------------------------------------
+// old not type safe wxHashTable
+// ----------------------------------------------------------------------------
+
wxHashTable::wxHashTable (int the_key_type, int size)
{
n = 0;
hash_table = (wxList**) NULL;
Create(the_key_type, size);
+ m_count = 0;
+ m_deleteContents = FALSE;
/*
n = size;
current_position = -1;
*/
}
-wxHashTable::~wxHashTable (void)
+wxHashTable::~wxHashTable ()
{
Destroy();
}
-void wxHashTable::Destroy(void)
+void wxHashTable::Destroy()
{
if (!hash_table) return;
int i;
void wxHashTable::DoCopy(const wxHashTable& table)
{
n = table.n;
+ m_count = table.m_count;
current_position = table.current_position;
current_node = NULL; // doesn't matter - Next() will reconstruct it
key_type = table.key_type;
{
// Should NEVER be
long k = (long) key;
- if (k < 0)
- k = -k;
int position = (int) (k % n);
+ if (position < 0) position = -position;
+
if (!hash_table[position])
+ {
hash_table[position] = new wxList (wxKEY_INTEGER);
+ if (m_deleteContents) hash_table[position]->DeleteContents(TRUE);
+ }
hash_table[position]->Append (value, object);
+ m_count++;
}
void wxHashTable::Put (long key, const wxChar *value, wxObject * object)
{
// Should NEVER be
long k = (long) key;
- if (k < 0)
- k = -k;
int position = (int) (k % n);
+ if (position < 0) position = -position;
+
if (!hash_table[position])
- hash_table[position] = new wxList (wxKEY_INTEGER);
+ {
+ hash_table[position] = new wxList (wxKEY_STRING);
+ if (m_deleteContents) hash_table[position]->DeleteContents(TRUE);
+ }
hash_table[position]->Append (value, object);
+ m_count++;
}
void wxHashTable::Put (long key, wxObject * object)
{
// Should NEVER be
long k = (long) key;
- if (k < 0)
- k = -k;
int position = (int) (k % n);
+ if (position < 0) position = -position;
+
if (!hash_table[position])
+ {
hash_table[position] = new wxList (wxKEY_INTEGER);
+ if (m_deleteContents) hash_table[position]->DeleteContents(TRUE);
+ }
hash_table[position]->Append (k, object);
+ m_count++;
}
void wxHashTable::Put (const wxChar *key, wxObject * object)
{
int position = (int) (MakeKey (key) % n);
+ if (position < 0) position = -position;
if (!hash_table[position])
+ {
hash_table[position] = new wxList (wxKEY_STRING);
+ if (m_deleteContents) hash_table[position]->DeleteContents(TRUE);
+ }
hash_table[position]->Append (key, object);
+ m_count++;
}
wxObject *wxHashTable::Get (long key, long value) const
{
// Should NEVER be
long k = (long) key;
- if (k < 0)
- k = -k;
int position = (int) (k % n);
+ if (position < 0) position = -position;
+
if (!hash_table[position])
return (wxObject *) NULL;
else
{
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;
- if (k < 0)
- k = -k;
int position = (int) (k % n);
+ if (position < 0) position = -position;
+
if (!hash_table[position])
return (wxObject *) NULL;
else
{
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;
- if (k < 0)
- k = -k;
int position = (int) (k % n);
+ if (position < 0) position = -position;
+
if (!hash_table[position])
return (wxObject *) NULL;
else
wxObject *wxHashTable::Get (const wxChar *key) const
{
int position = (int) (MakeKey (key) % n);
+ if (position < 0) position = -position;
if (!hash_table[position])
return (wxObject *) NULL;
{
// Should NEVER be
long k = (long) key;
- if (k < 0)
- k = -k;
int position = (int) (k % n);
+ if (position < 0) position = -position;
+
if (!hash_table[position])
return (wxObject *) NULL;
else
{
wxNode *node = hash_table[position]->Find (k);
if (node)
- {
- wxObject *data = node->Data ();
- delete node;
- return data;
- }
+ {
+ wxObject *data = node->Data ();
+ delete node;
+ m_count--;
+ return data;
+ }
else
- return (wxObject *) NULL;
+ return (wxObject *) NULL;
}
}
wxObject *wxHashTable::Delete (const wxChar *key)
{
int position = (int) (MakeKey (key) % n);
+ if (position < 0) position = -position;
+
if (!hash_table[position])
return (wxObject *) NULL;
else
{
wxNode *node = hash_table[position]->Find (key);
if (node)
- {
- wxObject *data = node->Data ();
- delete node;
- return data;
- }
+ {
+ wxObject *data = node->Data ();
+ delete node;
+ m_count--;
+ return data;
+ }
else
- return (wxObject *) NULL;
+ return (wxObject *) NULL;
}
}
{
// Should NEVER be
long k = (long) key;
- if (k < 0)
- k = -k;
int position = (int) (k % n);
+ if (position < 0) position = -position;
+
if (!hash_table[position])
return (wxObject *) NULL;
else
{
wxNode *node = hash_table[position]->Find (value);
if (node)
- {
- wxObject *data = node->Data ();
- delete node;
- return data;
- }
+ {
+ wxObject *data = node->Data ();
+ delete node;
+ m_count--;
+ return data;
+ }
else
- return (wxObject *) NULL;
+ return (wxObject *) NULL;
}
}
wxObject *wxHashTable::Delete (long key, const wxChar *value)
{
int position = (int) (key % n);
+ if (position < 0) position = -position;
+
if (!hash_table[position])
return (wxObject *) NULL;
else
{
wxNode *node = hash_table[position]->Find (value);
if (node)
- {
- wxObject *data = node->Data ();
- delete node;
- 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;
}
void wxHashTable::DeleteContents (bool flag)
{
int i;
+ m_deleteContents = flag;
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++)
+ int i;
+ if (hash_table)
{
- if (hash_table[i])
- hash_table[i]->Clear ();
+ for (i = 0; i < n; i++)
+ {
+ if (hash_table[i])
+ hash_table[i]->Clear ();
+ }
}
+ m_count = 0;
}
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