// 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__
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma interface "hash.h"
#endif
-#include "wx/list.h"
-#include "wx/dynarray.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
+
+#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)
// pointers to objects
// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxHashTableBase : public wxObject
+#if wxUSE_OLD_HASH_TABLE
+
+class WXDLLIMPEXP_BASE wxHashTableBase : public wxObject
{
public:
wxHashTableBase();
private:
// no copy ctor/assignment operator (yet)
- 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
// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxHashTableLong : public wxObject
+class WXDLLIMPEXP_BASE wxHashTableLong : public wxObject
{
public:
- wxHashTableLong(size_t size = wxHASH_SIZE_DEFAULT) { Init(size); }
+ wxHashTableLong(size_t size = wxHASH_SIZE_DEFAULT)
+ { Init(size); }
virtual ~wxHashTableLong();
void Create(size_t size = wxHASH_SIZE_DEFAULT);
size_t m_count;
// not implemented yet
- DECLARE_NO_COPY_CLASS(wxHashTableLong);
+ DECLARE_NO_COPY_CLASS(wxHashTableLong)
+};
+
+// ----------------------------------------------------------------------------
+// wxStringHashTable: a hash table which indexes strings with longs
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE 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;
+
+ // remove the item, returning true if the item was found and deleted
+ bool Delete(long key) 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)
};
+#endif // WXWIN_COMPATIBILITY_2_4
+
+#endif // !wxUSE_STL
+
// ----------------------------------------------------------------------------
// 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:
+ virtual void DoDeleteContents( wxHashTableBase_Node* node );
+
+ // 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:
+ // 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:
+ typedef wxNode Node;
+ typedef wxNode* compatibility_iterator;
+
int n;
int current_position;
wxNode *current_node;
~wxHashTable();
// copy ctor and assignment operator
- wxHashTable(const wxHashTable& table) { DoCopy(table); }
+ wxHashTable(const wxHashTable& table) : wxObject()
+ { DoCopy(table); }
wxHashTable& operator=(const wxHashTable& table)
{ Clear(); DoCopy(table); return *this; }
// objects maintained separately
void BeginFind();
- wxNode *Next();
+ Node* Next();
void DeleteContents(bool flag);
void Clear();
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
-#define WX_DECLARE_HASH(eltype, listclass, hashclass) \
- class WXDLLEXPORT hashclass : public wxHashTableBase \
+#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); } \
+ protected: \
+ 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 \
{ \
public: \
hashclass(wxKeyType keyType = wxKEY_INTEGER, \
protected: \
void DoPut(long key, long value, eltype *data) \
{ \
- size_t slot = (size_t)abs(key % m_hashSize); \
+ 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); \
+ m_hashTable[slot]->DeleteContents(true); \
} \
\
((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)
+
+// 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)
+
+#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
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