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[wxWidgets.git] / include / wx / hash.h

diff --git a/include/wx/hash.h b/include/wx/hash.h
index 557238d6a410a0aead0bc2b7a4b27895edb184a8..07ece7d0aa5f6cc4be706c1a474f968d42a534d4 100644 (file)
--- a/include/wx/hash.h
+++ b/include/wx/hash.h
@@ -5,19 +5,32 @@
 // Modified by: VZ at 25.02.00: type safe hashes with WX_DECLARE_HASH()
 // Created:     01/02/97
 // RCS-ID:      $Id$
 // Modified by: VZ at 25.02.00: type safe hashes with WX_DECLARE_HASH()
 // Created:     01/02/97
 // RCS-ID:      $Id$

-// Copyright:   (c)
+// Copyright:   (c) Julian Smart

 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_HASH_H__
 #define _WX_HASH_H__
 
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_HASH_H__
 #define _WX_HASH_H__
 

-#ifdef __GNUG__
-#pragma interface "hash.h"
+#include "wx/defs.h"
+
+#if !wxUSE_STL && WXWIN_COMPATIBILITY_2_4
+    #define wxUSE_OLD_HASH_TABLE 1
+#else
+    #define wxUSE_OLD_HASH_TABLE 0

 #endif
 
 #endif
 

-#include "wx/list.h"
-#include "wx/dynarray.h"
+#if !wxUSE_STL
+    #include "wx/object.h"
+#else
+    class WXDLLIMPEXP_BASE wxObject;
+#endif
+#if wxUSE_OLD_HASH_TABLE
+    #include "wx/list.h"
+#endif
+#if WXWIN_COMPATIBILITY_2_4
+    #include "wx/dynarray.h"
+#endif

 
 // the default size of the hash
 #define wxHASH_SIZE_DEFAULT     (1000)
 
 // the default size of the hash
 #define wxHASH_SIZE_DEFAULT     (1000)


@@ -34,7 +47,9 @@
 // pointers to objects
 // ----------------------------------------------------------------------------
 
 // pointers to objects
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxHashTableBase : public wxObject
+#if wxUSE_OLD_HASH_TABLE
+
+class WXDLLIMPEXP_BASE wxHashTableBase : public wxObject

 {
 public:
     wxHashTableBase();
 {
 public:
     wxHashTableBase();


@@ -72,11 +87,153 @@ private:
     DECLARE_NO_COPY_CLASS(wxHashTableBase)
 };
 
     DECLARE_NO_COPY_CLASS(wxHashTableBase)
 };
 

+#else // if !wxUSE_OLD_HASH_TABLE
+
+#if !defined(wxENUM_KEY_TYPE_DEFINED)
+#define wxENUM_KEY_TYPE_DEFINED
+
+enum wxKeyType
+{
+    wxKEY_NONE,
+    wxKEY_INTEGER,
+    wxKEY_STRING
+};
+
+#endif
+
+union wxHashKeyValue
+{
+    long integer;
+    wxChar *string;
+};
+
+// for some compilers (AIX xlC), defining it as friend inside the class is not
+// enough, so provide a real forward declaration
+class WXDLLIMPEXP_BASE wxHashTableBase;
+
+class WXDLLIMPEXP_BASE wxHashTableBase_Node
+{
+    friend class WXDLLIMPEXP_BASE wxHashTableBase;
+    typedef class WXDLLIMPEXP_BASE wxHashTableBase_Node _Node;
+public:
+    wxHashTableBase_Node( long key, void* value,
+                          wxHashTableBase* table );
+    wxHashTableBase_Node( const wxChar* key, void* value,
+                          wxHashTableBase* table );
+    ~wxHashTableBase_Node();
+
+    long GetKeyInteger() const { return m_key.integer; }
+    const wxChar* GetKeyString() const { return m_key.string; }
+
+    void* GetData() const { return m_value; }
+    void SetData( void* data ) { m_value = data; }
+
+protected:
+    _Node* GetNext() const { return m_next; }
+
+protected:
+    // next node in the chain
+    wxHashTableBase_Node* m_next;
+
+    // key
+    wxHashKeyValue m_key;
+
+    // value
+    void* m_value;
+
+    // pointer to the hash containing the node, used to remove the
+    // node from the hash when the user deletes the node iterating
+    // through it
+    // TODO: move it to wxHashTable_Node (only wxHashTable supports
+    //       iteration)
+    wxHashTableBase* m_hashPtr;
+};
+
+class WXDLLIMPEXP_BASE wxHashTableBase
+#if !wxUSE_STL
+    : public wxObject
+#endif
+{
+    friend class WXDLLIMPEXP_BASE wxHashTableBase_Node;
+public:
+    typedef wxHashTableBase_Node Node;
+
+    wxHashTableBase();
+    virtual ~wxHashTableBase() { };
+
+    void Create( wxKeyType keyType = wxKEY_INTEGER,
+                 size_t size = wxHASH_SIZE_DEFAULT );
+    void Clear();
+    void Destroy();
+
+    size_t GetSize() const { return m_size; }
+    size_t GetCount() const { return m_count; }
+
+    void DeleteContents( bool flag ) { m_deleteContents = flag; }
+
+    static long MakeKey(const wxChar *string);
+
+protected:
+    void DoPut( long key, long hash, void* data );
+    void DoPut( const wxChar* key, long hash, void* data );
+    void* DoGet( long key, long hash ) const;
+    void* DoGet( const wxChar* key, long hash ) const;
+    void* DoDelete( long key, long hash );
+    void* DoDelete( const wxChar* key, long hash );
+
+private:
+    // Remove the node from the hash, *only called from
+    // ~wxHashTable*_Node destructor
+    void DoRemoveNode( wxHashTableBase_Node* node );
+
+    // destroys data contained in the node if appropriate:
+    // deletes the key if it is a string and destrys
+    // the value if m_deleteContents is true
+    void DoDestroyNode( wxHashTableBase_Node* node );
+
+    // inserts a node in the table (at the end of the chain)
+    void DoInsertNode( size_t bucket, wxHashTableBase_Node* node );
+
+    // removes a node from the table (fiven a pointer to the previous
+    // but does not delete it (only deletes its contents)
+    void DoUnlinkNode( size_t bucket, wxHashTableBase_Node* node,
+                       wxHashTableBase_Node* prev );
+
+    // unconditionally deletes node value (invoking the
+    // correct destructor)
+    virtual void DoDeleteContents( wxHashTableBase_Node* node ) = 0;
+
+protected:
+    // number of buckets
+    size_t m_size;
+
+    // number of nodes (key/value pairs)
+    size_t m_count;
+
+    // table
+    Node** m_table;
+
+    // key typ (INTEGER/STRING)
+    wxKeyType m_keyType;
+
+    // delete contents when hash is cleared
+    bool m_deleteContents;
+
+private:
+    DECLARE_NO_COPY_CLASS(wxHashTableBase)
+};
+
+#endif // wxUSE_OLD_HASH_TABLE
+
+#if !wxUSE_STL
+
+#if WXWIN_COMPATIBILITY_2_4
+

 // ----------------------------------------------------------------------------
 // a hash table which stores longs
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 // a hash table which stores longs
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxHashTableLong : public wxObject
+class WXDLLIMPEXP_BASE wxHashTableLong : public wxObject

 {
 public:
     wxHashTableLong(size_t size = wxHASH_SIZE_DEFAULT)
 {
 public:
     wxHashTableLong(size_t size = wxHASH_SIZE_DEFAULT)


@@ -114,7 +271,7 @@ private:
 // wxStringHashTable: a hash table which indexes strings with longs
 // ----------------------------------------------------------------------------
 
 // wxStringHashTable: a hash table which indexes strings with longs
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxStringHashTable : public wxObject
+class WXDLLIMPEXP_BASE wxStringHashTable : public wxObject

 {
 public:
     wxStringHashTable(size_t sizeTable = wxHASH_SIZE_DEFAULT);
 {
 public:
     wxStringHashTable(size_t sizeTable = wxHASH_SIZE_DEFAULT);


@@ -124,9 +281,12 @@ public:
     void Put(long key, const wxString& value);
 
     // get the string from the key: if not found, an empty string is returned
     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
+    // and the wasFound is set to false if not NULL

     wxString Get(long key, bool *wasFound = NULL) const;
 
     wxString Get(long key, bool *wasFound = NULL) const;
 

+    // remove the item, returning true if the item was found and deleted
+    bool Delete(long key) const;
+

     // clean up
     void Destroy();
 
     // clean up
     void Destroy();
 


@@ -140,13 +300,123 @@ private:
     DECLARE_NO_COPY_CLASS(wxStringHashTable)
 };
 
     DECLARE_NO_COPY_CLASS(wxStringHashTable)
 };
 

+#endif // WXWIN_COMPATIBILITY_2_4
+
+#endif // !wxUSE_STL
+

 // ----------------------------------------------------------------------------
 // for compatibility only
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 // for compatibility only
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxHashTable : public wxObject
+#if !wxUSE_OLD_HASH_TABLE
+
+class WXDLLIMPEXP_BASE wxHashTable_Node : public wxHashTableBase_Node
+{
+    friend class WXDLLIMPEXP_BASE wxHashTable;
+public:
+    wxHashTable_Node( long key, void* value,
+                      wxHashTableBase* table )
+        : wxHashTableBase_Node( key, value, table ) { }
+    wxHashTable_Node( const wxChar* key, void* value,
+                      wxHashTableBase* table )
+        : wxHashTableBase_Node( key, value, table ) { }
+
+    wxObject* GetData() const
+        { return (wxObject*)wxHashTableBase_Node::GetData(); }
+    void SetData( wxObject* data )
+        { wxHashTableBase_Node::SetData( data ); }
+
+    wxHashTable_Node* GetNext() const
+        { return (wxHashTable_Node*)wxHashTableBase_Node::GetNext(); }
+};
+
+// should inherit protectedly, but it is public for compatibility in
+// order to publicly inherit from wxObject
+class WXDLLIMPEXP_BASE wxHashTable : public wxHashTableBase
+{
+    typedef wxHashTableBase hash;
+public:
+    typedef wxHashTable_Node Node;
+    typedef wxHashTable_Node* compatibility_iterator;
+public:
+    wxHashTable( wxKeyType keyType = wxKEY_INTEGER,
+                 size_t size = wxHASH_SIZE_DEFAULT )
+        : wxHashTableBase() { Create( keyType, size ); BeginFind(); }
+    wxHashTable( const wxHashTable& table );
+
+    virtual ~wxHashTable() { Destroy(); }
+
+    const wxHashTable& operator=( const wxHashTable& );
+
+    // key and value are the same
+    void Put(long value, wxObject *object)
+        { DoPut( value, value, object ); }
+    void Put(long lhash, long value, wxObject *object)
+        { DoPut( value, lhash, object ); }
+    void Put(const wxChar *value, wxObject *object)
+        { DoPut( value, MakeKey( value ), object ); }
+    void Put(long lhash, const wxChar *value, wxObject *object)
+        { DoPut( value, lhash, object ); }
+
+    // key and value are the same
+    wxObject *Get(long value) const
+        { return (wxObject*)DoGet( value, value ); }
+    wxObject *Get(long lhash, long value) const
+        { return (wxObject*)DoGet( value, lhash ); }
+    wxObject *Get(const wxChar *value) const
+        { return (wxObject*)DoGet( value, MakeKey( value ) ); }
+    wxObject *Get(long lhash, const wxChar *value) const
+        { return (wxObject*)DoGet( value, lhash ); }
+
+    // Deletes entry and returns data if found
+    wxObject *Delete(long key)
+        { return (wxObject*)DoDelete( key, key ); }
+    wxObject *Delete(long lhash, long key)
+        { return (wxObject*)DoDelete( key, lhash ); }
+    wxObject *Delete(const wxChar *key)
+        { return (wxObject*)DoDelete( key, MakeKey( key ) ); }
+    wxObject *Delete(long lhash, const wxChar *key)
+        { return (wxObject*)DoDelete( key, lhash ); }
+
+    // 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
+        { return wxHashTableBase::MakeKey(string); }
+
+    // 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() { m_curr = NULL; m_currBucket = 0; }
+    Node* Next();
+
+    void Clear() { wxHashTableBase::Clear(); }
+
+    size_t GetCount() const { return wxHashTableBase::GetCount(); }
+protected:
+    // copy helper
+    void DoCopy( const wxHashTable& copy );
+
+    // searches the next node starting from bucket bucketStart and sets
+    // m_curr to it and m_currBucket to its bucket
+    void GetNextNode( size_t bucketStart );
+private:
+    virtual void DoDeleteContents( wxHashTableBase_Node* node );
+
+    // current node
+    Node* m_curr;
+
+    // bucket the current node belongs to
+    size_t m_currBucket;
+};
+
+#else // if wxUSE_OLD_HASH_TABLE
+
+class WXDLLIMPEXP_BASE wxHashTable : public wxObject

 {
 public:
 {
 public:

+    typedef wxNode Node;
+    typedef wxNode* compatibility_iterator;
+

     int n;
     int current_position;
     wxNode *current_node;
     int n;
     int current_position;
     wxNode *current_node;


@@ -215,7 +485,7 @@ public:
     // objects maintained separately
 
     void BeginFind();
     // objects maintained separately
 
     void BeginFind();

-    wxNode *Next();
+    Node* Next();

 
     void DeleteContents(bool flag);
     void Clear();
 
     void DeleteContents(bool flag);
     void Clear();


@@ -230,8 +500,40 @@ private:
     DECLARE_DYNAMIC_CLASS(wxHashTable)
 };
 
     DECLARE_DYNAMIC_CLASS(wxHashTable)
 };
 

+#endif // wxUSE_OLD_HASH_TABLE
+
+#if !wxUSE_OLD_HASH_TABLE
+

 // defines a new type safe hash table which stores the elements of type eltype
 // in lists of class listclass
 // defines a new type safe hash table which stores the elements of type eltype
 // in lists of class listclass

+#define _WX_DECLARE_HASH(eltype, dummy, hashclass, classexp)                  \
+    classexp hashclass : public wxHashTableBase                               \
+    {                                                                         \
+    public:                                                                   \
+        hashclass(wxKeyType keyType = wxKEY_INTEGER,                          \
+                  size_t size = wxHASH_SIZE_DEFAULT)                          \
+            : wxHashTableBase() { Create(keyType, size); }                    \
+                                                                              \
+        virtual ~hashclass() { Destroy(); }                                   \
+                                                                              \
+        void Put(long key, eltype *data) { DoPut(key, key, (void*)data); }    \
+        void Put(long lhash, long key, eltype *data)                          \
+            { DoPut(key, lhash, (void*)data); }                               \
+        eltype *Get(long key) const { return (eltype*)DoGet(key, key); }      \
+        eltype *Get(long lhash, long key) const                               \
+            { return (eltype*)DoGet(key, lhash); }                            \
+        eltype *Delete(long key) { return (eltype*)DoDelete(key, key); }      \
+        eltype *Delete(long lhash, long key)                                  \
+            { return (eltype*)DoDelete(key, lhash); }                         \
+    private:                                                                  \
+        virtual void DoDeleteContents( wxHashTableBase_Node* node )           \
+            { delete (eltype*)node->GetData(); }                              \
+                                                                              \
+        DECLARE_NO_COPY_CLASS(hashclass)                                      \
+    }
+
+#else // if wxUSE_OLD_HASH_TABLE
+

 #define _WX_DECLARE_HASH(eltype, listclass, hashclass, classexp)               \
     classexp hashclass : public wxHashTableBase                                \
     {                                                                          \
 #define _WX_DECLARE_HASH(eltype, listclass, hashclass, classexp)               \
     classexp hashclass : public wxHashTableBase                                \
     {                                                                          \


@@ -282,14 +584,18 @@ private:
             {                                                                  \
                 m_hashTable[slot] = new listclass(m_keyType);                  \
                 if ( m_deleteContents )                                        \
             {                                                                  \
                 m_hashTable[slot] = new listclass(m_keyType);                  \
                 if ( m_deleteContents )                                        \

-                    m_hashTable[slot]->DeleteContents(TRUE);                   \
+                    m_hashTable[slot]->DeleteContents(true);                   \

             }                                                                  \
                                                                                \
             ((listclass *)m_hashTable[slot])->Append(value, data);             \
             m_count++;                                                         \
         }                                                                      \
             }                                                                  \
                                                                                \
             ((listclass *)m_hashTable[slot])->Append(value, data);             \
             m_count++;                                                         \
         }                                                                      \

+                                                                               \
+        DECLARE_NO_COPY_CLASS(hashclass)                                       \

     }
 
     }
 

+#endif // wxUSE_OLD_HASH_TABLE
+

 // this macro is to be used in the user code
 #define WX_DECLARE_HASH(el, list, hash) \
     _WX_DECLARE_HASH(el, list, hash, class)
 // this macro is to be used in the user code
 #define WX_DECLARE_HASH(el, list, hash) \
     _WX_DECLARE_HASH(el, list, hash, class)


@@ -302,5 +608,23 @@ private:
 #define WX_DECLARE_USER_EXPORTED_HASH(el, list, hash, usergoo)  \
     _WX_DECLARE_HASH(el, list, hash, class usergoo)
 
 #define WX_DECLARE_USER_EXPORTED_HASH(el, list, hash, usergoo)  \
     _WX_DECLARE_HASH(el, list, hash, class usergoo)
 

+// delete all hash elements
+//
+// NB: the class declaration of the hash elements must be visible from the
+//     place where you use this macro, otherwise the proper destructor may not
+//     be called (a decent compiler should give a warning about it, but don't
+//     count on it)!
+#define WX_CLEAR_HASH_TABLE(hash)                                            \
+    {                                                                        \
+        (hash).BeginFind();                                                  \
+        wxHashTable::compatibility_iterator it = (hash).Next();              \
+        while( it )                                                          \
+        {                                                                    \
+            delete it->GetData();                                            \
+            it = (hash).Next();                                              \
+        }                                                                    \
+        (hash).Clear();                                                      \
+    }
+

 #endif
     // _WX_HASH_H__
 #endif
     // _WX_HASH_H__