X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/bd83cb56d29385e2a87840eeb3876b976a5afc43..a685dd314cc5daeb1492a4a57f475df91d6cd126:/src/common/hash.cpp?ds=sidebyside

diff --git a/src/common/hash.cpp b/src/common/hash.cpp
index 09e9b42d13..9a538b0fd9 100644
--- a/src/common/hash.cpp
+++ b/src/common/hash.cpp
@@ -1,11 +1,11 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        hash.cpp
+// Name:        src/common/hash.cpp
 // Purpose:     wxHashTable implementation
 // Author:      Julian Smart
 // 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
+// Copyright:   (c) Julian Smart
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
@@ -17,22 +17,19 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#ifdef __GNUG__
-#pragma implementation "hash.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
-#pragma hdrstop
+    #pragma hdrstop
 #endif
 
 #ifndef WX_PRECOMP
-#include "wx/list.h"
+    #include "wx/list.h"
+    #include "wx/hash.h"
 #endif
 
-#include "wx/hash.h"
+#if wxUSE_OLD_HASH_TABLE
 
 #include <string.h>
 #include <stdarg.h>
@@ -53,7 +50,7 @@ IMPLEMENT_DYNAMIC_CLASS(wxHashTable, wxObject)
 
 wxHashTableBase::wxHashTableBase()
 {
-    m_deleteContents = FALSE;
+    m_deleteContents = false;
     m_hashTable = (wxListBase **)NULL;
     m_hashSize = 0;
     m_count = 0;
@@ -119,6 +116,8 @@ wxNodeBase *wxHashTableBase::GetNode(long key, long value) const
     return node;
 }
 
+#if WXWIN_COMPATIBILITY_2_4
+
 // ----------------------------------------------------------------------------
 // wxHashTableLong
 // ----------------------------------------------------------------------------
@@ -143,6 +142,11 @@ void wxHashTableLong::Init(size_t size)
     m_count = 0;
 }
 
+void wxHashTableLong::Create(size_t size)
+{
+    Init(size);
+}
+
 void wxHashTableLong::Destroy()
 {
     for ( size_t n = 0; n < m_hashSize; n++ )
@@ -279,7 +283,7 @@ void wxStringHashTable::Put(long key, const wxString& value)
 
 wxString wxStringHashTable::Get(long key, bool *wasFound) const
 {
-    wxCHECK_MSG( m_hashSize, _T(""), _T("must call Create() first") );
+    wxCHECK_MSG( m_hashSize, wxEmptyString, _T("must call Create() first") );
 
     size_t slot = (size_t)abs((int)(key % (long)m_hashSize));
 
@@ -292,7 +296,7 @@ wxString wxStringHashTable::Get(long key, bool *wasFound) const
             if ( keys->Item(n) == key )
             {
                 if ( wasFound )
-                    *wasFound = TRUE;
+                    *wasFound = true;
 
                 return m_values[slot]->Item(n);
             }
@@ -300,11 +304,37 @@ wxString wxStringHashTable::Get(long key, bool *wasFound) const
     }
 
     if ( wasFound )
-        *wasFound = FALSE;
+        *wasFound = false;
+
+    return wxEmptyString;
+}
+
+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 _T("");
+    return false;
 }
 
+#endif // WXWIN_COMPATIBILITY_2_4
+
 // ----------------------------------------------------------------------------
 // old not type safe wxHashTable
 // ----------------------------------------------------------------------------
@@ -315,7 +345,7 @@ wxHashTable::wxHashTable (int the_key_type, int size)
   hash_table = (wxList**) NULL;
   Create(the_key_type, size);
   m_count = 0;
-  m_deleteContents = FALSE;
+  m_deleteContents = false;
 /*
   n = size;
   current_position = -1;
@@ -358,13 +388,14 @@ bool wxHashTable::Create(int the_key_type, int size)
   int i;
   for (i = 0; i < size; i++)
     hash_table[i] = (wxList *) NULL;
-  return TRUE;
+  return true;
 }
 
 
 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;
@@ -391,7 +422,7 @@ void wxHashTable::Put (long key, long value, wxObject * object)
   if (!hash_table[position])
   {
     hash_table[position] = new wxList (wxKEY_INTEGER);
-    if (m_deleteContents) hash_table[position]->DeleteContents(TRUE);
+    if (m_deleteContents) hash_table[position]->DeleteContents(true);
   }
 
   hash_table[position]->Append (value, object);
@@ -408,8 +439,8 @@ void wxHashTable::Put (long key, const wxChar *value, wxObject * object)
 
   if (!hash_table[position])
   {
-    hash_table[position] = new wxList (wxKEY_INTEGER);
-    if (m_deleteContents) hash_table[position]->DeleteContents(TRUE);
+    hash_table[position] = new wxList (wxKEY_STRING);
+    if (m_deleteContents) hash_table[position]->DeleteContents(true);
   }
 
   hash_table[position]->Append (value, object);
@@ -427,7 +458,7 @@ void wxHashTable::Put (long key, wxObject * object)
   if (!hash_table[position])
   {
     hash_table[position] = new wxList (wxKEY_INTEGER);
-    if (m_deleteContents) hash_table[position]->DeleteContents(TRUE);
+    if (m_deleteContents) hash_table[position]->DeleteContents(true);
   }
 
   hash_table[position]->Append (k, object);
@@ -442,7 +473,7 @@ void wxHashTable::Put (const wxChar *key, wxObject * object)
   if (!hash_table[position])
   {
     hash_table[position] = new wxList (wxKEY_STRING);
-    if (m_deleteContents) hash_table[position]->DeleteContents(TRUE);
+    if (m_deleteContents) hash_table[position]->DeleteContents(true);
   }
 
   hash_table[position]->Append (key, object);
@@ -463,7 +494,7 @@ wxObject *wxHashTable::Get (long key, long value) const
     {
       wxNode *node = hash_table[position]->Find (value);
       if (node)
-        return node->Data ();
+        return node->GetData ();
       else
         return (wxObject *) NULL;
     }
@@ -483,7 +514,7 @@ wxObject *wxHashTable::Get (long key, const wxChar *value) const
     {
       wxNode *node = hash_table[position]->Find (value);
       if (node)
-        return node->Data ();
+        return node->GetData ();
       else
         return (wxObject *) NULL;
     }
@@ -502,7 +533,7 @@ wxObject *wxHashTable::Get (long key) const
   else
     {
       wxNode *node = hash_table[position]->Find (k);
-      return node ? node->Data () : (wxObject*)NULL;
+      return node ? node->GetData () : (wxObject*)NULL;
     }
 }
 
@@ -516,7 +547,7 @@ wxObject *wxHashTable::Get (const wxChar *key) const
   else
     {
       wxNode *node = hash_table[position]->Find (key);
-      return node ? node->Data () : (wxObject*)NULL;
+      return node ? node->GetData () : (wxObject*)NULL;
     }
 }
 
@@ -535,7 +566,7 @@ wxObject *wxHashTable::Delete (long key)
       wxNode *node = hash_table[position]->Find (k);
       if (node)
         {
-          wxObject *data = node->Data ();
+          wxObject *data = node->GetData ();
           delete node;
           m_count--;
           return data;
@@ -557,7 +588,7 @@ wxObject *wxHashTable::Delete (const wxChar *key)
       wxNode *node = hash_table[position]->Find (key);
       if (node)
         {
-          wxObject *data = node->Data ();
+          wxObject *data = node->GetData ();
           delete node;
           m_count--;
           return data;
@@ -582,7 +613,7 @@ wxObject *wxHashTable::Delete (long key, int value)
       wxNode *node = hash_table[position]->Find (value);
       if (node)
         {
-          wxObject *data = node->Data ();
+          wxObject *data = node->GetData ();
           delete node;
           m_count--;
           return data;
@@ -604,7 +635,7 @@ wxObject *wxHashTable::Delete (long key, const wxChar *value)
       wxNode *node = hash_table[position]->Find (value);
       if (node)
         {
-          wxObject *data = node->Data ();
+          wxObject *data = node->GetData ();
           delete node;
           m_count--;
           return data;
@@ -630,10 +661,10 @@ void wxHashTable::BeginFind ()
   current_node = (wxNode *) NULL;
 }
 
-wxNode *wxHashTable::Next ()
+wxHashTable::Node* wxHashTable::Next ()
 {
   wxNode *found = (wxNode *) NULL;
-  bool end = FALSE;
+  bool end = false;
   while (!end && !found)
     {
       if (!current_node)
@@ -643,20 +674,20 @@ wxNode *wxHashTable::Next ()
             {
               current_position = -1;
               current_node = (wxNode *) NULL;
-              end = TRUE;
+              end = true;
             }
           else
             {
               if (hash_table[current_position])
                 {
-                  current_node = hash_table[current_position]->First ();
+                  current_node = hash_table[current_position]->GetFirst ();
                   found = current_node;
                 }
             }
         }
       else
         {
-          current_node = current_node->Next ();
+          current_node = current_node->GetNext ();
           found = current_node;
         }
     }
@@ -676,12 +707,371 @@ void wxHashTable::DeleteContents (bool flag)
 
 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;
 }
 
+#else // if !wxUSE_OLD_HASH_TABLE
+
+wxHashTableBase_Node::wxHashTableBase_Node( long key, void* value,
+                                            wxHashTableBase* table )
+    : m_value( value ), m_hashPtr( table )
+{
+    m_key.integer = key;
+}
+
+wxHashTableBase_Node::wxHashTableBase_Node( const wxChar* key, void* value,
+                                            wxHashTableBase* table )
+    : m_value( value ), m_hashPtr( table )
+{
+    m_key.string = wxStrcpy( new wxChar[wxStrlen( key ) + 1], key );
+}
+
+wxHashTableBase_Node::~wxHashTableBase_Node()
+{
+    if( m_hashPtr ) m_hashPtr->DoRemoveNode( this );
+}
+
+//
+
+wxHashTableBase::wxHashTableBase()
+    : m_size( 0 ), m_count( 0 ), m_table( NULL ), m_keyType( wxKEY_NONE ),
+      m_deleteContents( false )
+{
+}
+
+void wxHashTableBase::Create( wxKeyType keyType, size_t size )
+{
+    m_keyType = keyType;
+    m_size = size;
+    m_table = new wxHashTableBase_Node*[ m_size ];
+
+    for( size_t i = 0; i < m_size; ++i )
+        m_table[i] = NULL;
+}
+
+void wxHashTableBase::Clear()
+{
+    for( size_t i = 0; i < m_size; ++i )
+    {
+        Node* end = m_table[i];
+
+        if( end == NULL )
+            continue;
+
+        Node *curr, *next = end->GetNext();
+
+        do
+        {
+            curr = next;
+            next = curr->GetNext();
+
+            DoDestroyNode( curr );
+
+            delete curr;
+        }
+        while( curr != end );
+
+        m_table[i] = NULL;
+    }
+
+    m_count = 0;
+}
+
+void wxHashTableBase::DoRemoveNode( wxHashTableBase_Node* node )
+{
+    size_t bucket = ( m_keyType == wxKEY_INTEGER ?
+                      node->m_key.integer        :
+                      MakeKey( node->m_key.string ) ) % m_size;
+
+    if( node->GetNext() == node )
+    {
+        // single-node chain (common case)
+        m_table[bucket] = NULL;
+    }
+    else
+    {
+        Node *start = m_table[bucket], *curr;
+        Node* prev = start;
+
+        for( curr = prev->GetNext(); curr != node;
+             prev = curr, curr = curr->GetNext() ) ;
+
+        DoUnlinkNode( bucket, node, prev );
+    }
+
+    DoDestroyNode( node );
+}
+
+void wxHashTableBase::DoDestroyNode( wxHashTableBase_Node* node )
+{
+    // if it is called from DoRemoveNode, node has already been
+    // removed, from other places it does not matter
+    node->m_hashPtr = NULL;
+
+    if( m_keyType == wxKEY_STRING )
+        delete[] node->m_key.string;
+    if( m_deleteContents )
+        DoDeleteContents( node );
+}
+
+void wxHashTableBase::Destroy()
+{
+    Clear();
+
+    delete[] m_table;
+
+    m_table = NULL;
+    m_size = 0;
+}
+
+void wxHashTableBase::DoInsertNode( size_t bucket, wxHashTableBase_Node* node )
+{
+    if( m_table[bucket] == NULL )
+    {
+        m_table[bucket] = node->m_next = node;
+    }
+    else
+    {
+        Node *prev = m_table[bucket];
+        Node *next = prev->m_next;
+
+        prev->m_next = node;
+        node->m_next = next;
+        m_table[bucket] = node;
+    }
+
+    ++m_count;
+}
+
+void wxHashTableBase::DoPut( long key, long hash, void* data )
+{
+    wxASSERT( m_keyType == wxKEY_INTEGER );
+
+    size_t bucket = size_t(hash) % m_size;
+    Node* node = new wxHashTableBase_Node( key, data, this );
+
+    DoInsertNode( bucket, node );
+}
+
+void wxHashTableBase::DoPut( const wxChar* key, long hash, void* data )
+{
+    wxASSERT( m_keyType == wxKEY_STRING );
+
+    size_t bucket = size_t(hash) % m_size;
+    Node* node = new wxHashTableBase_Node( key, data, this );
+
+    DoInsertNode( bucket, node );
+}
+
+void* wxHashTableBase::DoGet( long key, long hash ) const
+{
+    wxASSERT( m_keyType == wxKEY_INTEGER );
+
+    size_t bucket = size_t(hash) % m_size;
+
+    if( m_table[bucket] == NULL )
+        return NULL;
+
+    Node *first = m_table[bucket]->GetNext(),
+         *curr = first;
+
+    do
+    {
+        if( curr->m_key.integer == key )
+            return curr->m_value;
+
+        curr = curr->GetNext();
+    }
+    while( curr != first );
+
+    return NULL;
+}
+
+void* wxHashTableBase::DoGet( const wxChar* key, long hash ) const
+{
+    wxASSERT( m_keyType == wxKEY_STRING );
+
+    size_t bucket = size_t(hash) % m_size;
+
+    if( m_table[bucket] == NULL )
+        return NULL;
+
+    Node *first = m_table[bucket]->GetNext(),
+         *curr = first;
+
+    do
+    {
+        if( wxStrcmp( curr->m_key.string, key ) == 0 )
+            return curr->m_value;
+
+        curr = curr->GetNext();
+    }
+    while( curr != first );
+
+    return NULL;
+}
+
+void wxHashTableBase::DoUnlinkNode( size_t bucket, wxHashTableBase_Node* node,
+                                    wxHashTableBase_Node* prev )
+{
+    if( node == m_table[bucket] )
+        m_table[bucket] = prev;
+
+    if( prev == node && prev == node->GetNext() )
+        m_table[bucket] = NULL;
+    else
+        prev->m_next = node->m_next;
+
+    DoDestroyNode( node );
+    --m_count;
+}
+
+void* wxHashTableBase::DoDelete( long key, long hash )
+{
+    wxASSERT( m_keyType == wxKEY_INTEGER );
+
+    size_t bucket = size_t(hash) % m_size;
+
+    if( m_table[bucket] == NULL )
+        return NULL;
+
+    Node *first = m_table[bucket]->GetNext(),
+         *curr = first,
+         *prev = m_table[bucket];
+
+    do
+    {
+        if( curr->m_key.integer == key )
+        {
+            void* retval = curr->m_value;
+            curr->m_value = NULL;
+
+            DoUnlinkNode( bucket, curr, prev );
+            delete curr;
+
+            return retval;
+        }
+
+        prev = curr;
+        curr = curr->GetNext();
+    }
+    while( curr != first );
+
+    return NULL;
+}
+
+void* wxHashTableBase::DoDelete( const wxChar* key, long hash )
+{
+    wxASSERT( m_keyType == wxKEY_STRING );
+
+    size_t bucket = size_t(hash) % m_size;
+
+    if( m_table[bucket] == NULL )
+        return NULL;
+
+    Node *first = m_table[bucket]->GetNext(),
+         *curr = first,
+         *prev = m_table[bucket];
+
+    do
+    {
+        if( wxStrcmp( curr->m_key.string, key ) == 0 )
+        {
+            void* retval = curr->m_value;
+            curr->m_value = NULL;
+
+            DoUnlinkNode( bucket, curr, prev );
+            delete curr;
+
+            return retval;
+        }
+
+        prev = curr;
+        curr = curr->GetNext();
+    }
+    while( curr != first );
+
+    return NULL;
+}
+
+long wxHashTableBase::MakeKey( const wxChar *str )
+{
+    long int_key = 0;
+
+    while( *str )
+        int_key += (wxUChar)*str++;
+
+    return int_key;
+}
+
+// ----------------------------------------------------------------------------
+// wxHashTable
+// ----------------------------------------------------------------------------
+
+wxHashTable::wxHashTable( const wxHashTable& table )
+           : wxHashTableBase()
+{
+    DoCopy( table );
+}
+
+const wxHashTable& wxHashTable::operator=( const wxHashTable& table )
+{
+    Destroy();
+    DoCopy( table );
+
+    return *this;
+}
+
+void wxHashTable::DoCopy( const wxHashTable& WXUNUSED(table) )
+{
+    Create( m_keyType, m_size );
+
+    wxFAIL;
+}
+
+void wxHashTable::DoDeleteContents( wxHashTableBase_Node* node )
+{
+    delete ((wxHashTable_Node*)node)->GetData();
+}
+
+void wxHashTable::GetNextNode( size_t bucketStart )
+{
+    for( size_t i = bucketStart; i < m_size; ++i )
+    {
+        if( m_table[i] != NULL )
+        {
+            m_curr = ((Node*)m_table[i])->GetNext();
+            m_currBucket = i;
+            return;
+        }
+    }
+
+    m_curr = NULL;
+    m_currBucket = 0;
+}
+
+wxHashTable::Node* wxHashTable::Next()
+{
+    if( m_curr == NULL )
+        GetNextNode( 0 );
+    else
+    {
+        m_curr = m_curr->GetNext();
+
+        if( m_curr == ( (Node*)m_table[m_currBucket] )->GetNext() )
+            GetNextNode( m_currBucket + 1 );
+    }
+
+    return m_curr;
+}
+
+#endif // !wxUSE_OLD_HASH_TABLE