// 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__
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma interface "hash.h"
-#endif
-
#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
-class WXDLLIMPEXP_BASE wxObject;
-
// the default size of the hash
#define wxHASH_SIZE_DEFAULT (1000)
// pointers to objects
// ----------------------------------------------------------------------------
-#if !wxUSE_STL
+#if wxUSE_OLD_HASH_TABLE
class WXDLLIMPEXP_BASE wxHashTableBase : public wxObject
{
DECLARE_NO_COPY_CLASS(wxHashTableBase)
};
-#else
-
-#include "wx/hashmap.h"
+#else // if !wxUSE_OLD_HASH_TABLE
#if !defined(wxENUM_KEY_TYPE_DEFINED)
#define wxENUM_KEY_TYPE_DEFINED
wxChar *string;
};
-struct WXDLLIMPEXP_BASE wxHashTableHash
+// 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
{
- wxHashTableHash() { }
- wxHashTableHash( wxKeyType keyType ) : m_keyType( keyType ) { }
+ 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();
- wxKeyType m_keyType;
+ long GetKeyInteger() const { return m_key.integer; }
+ const wxChar* GetKeyString() const { return m_key.string; }
- unsigned long operator ()( const wxHashKeyValue& k ) const
- {
- if( m_keyType == wxKEY_STRING )
- return wxStringHash::wxCharStringHash( k.string );
- else
- return (unsigned long)k.integer;
- }
-};
+ void* GetData() const { return m_value; }
+ void SetData( void* data ) { m_value = data; }
-struct WXDLLIMPEXP_BASE wxHashTableEqual
-{
- wxHashTableEqual() { }
- wxHashTableEqual( wxKeyType keyType ) : m_keyType( keyType ) { }
+protected:
+ _Node* GetNext() const { return m_next; }
- wxKeyType m_keyType;
+protected:
+ // next node in the chain
+ wxHashTableBase_Node* m_next;
- bool operator ()( const wxHashKeyValue& k1, const wxHashKeyValue& k2 ) const
- {
- if( m_keyType == wxKEY_STRING )
- return wxStrcmp( k1.string, k2.string ) == 0;
- else
- return k1.integer == k2.integer;
- }
-};
+ // key
+ wxHashKeyValue m_key;
-WX_DECLARE_EXPORTED_HASH_MAP( wxHashKeyValue,
- void*,
- wxHashTableHash,
- wxHashTableEqual,
- wxHashTableBaseBase );
+ // 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:
- wxHashTableBase( wxKeyType keyType = wxKEY_INTEGER,
- size_t size = wxHASH_SIZE_DEFAULT )
- : m_map( size, wxHashTableHash( keyType ),
- wxHashTableEqual( keyType ) ),
- m_keyType( keyType ) { }
-
- ~wxHashTableBase() { Clear(); }
-
- size_t GetCount() const { return m_map.size(); }
-
- void Clear()
- {
- if( m_keyType == wxKEY_STRING )
- {
- for( wxHashTableBaseBase::iterator it = m_map.begin(),
- en = m_map.end();
- it != en; )
- {
- wxChar* tmp = it->first.string;
- ++it;
- delete[] tmp; // used in operator++
- }
- }
- m_map.clear();
- }
-protected:
- void DoPut( long key, void* data )
- {
- wxASSERT( m_keyType == wxKEY_INTEGER );
+ typedef wxHashTableBase_Node Node;
- wxHashKeyValue k; k.integer = key;
- m_map[k] = data;
- }
+ wxHashTableBase();
+ virtual ~wxHashTableBase() { };
- void DoPut( const wxChar* key, void* data )
- {
- wxASSERT( m_keyType == wxKEY_STRING );
-
- wxHashKeyValue k;
- k.string = (wxChar*)key;
- wxHashTableBaseBase::iterator it = m_map.find(k);
-
- if( it == m_map.end() )
- {
- k.string = new wxChar[wxStrlen(key) + 1];
- wxStrcpy(k.string, key);
- m_map[k] = data;
- }
- else
- it->second = data;
- }
+ void Create( wxKeyType keyType = wxKEY_INTEGER,
+ size_t size = wxHASH_SIZE_DEFAULT );
+ void Clear();
+ void Destroy();
- void* DoGet( long key ) const
- {
- wxASSERT( m_keyType == wxKEY_INTEGER );
+ size_t GetSize() const { return m_size; }
+ size_t GetCount() const { return m_count; }
- wxHashKeyValue k; k.integer = key;
- wxHashTableBaseBase::const_iterator it = m_map.find( k );
+ void DeleteContents( bool flag ) { m_deleteContents = flag; }
- return it != m_map.end() ? it->second : NULL;
- }
+ static long MakeKey(const wxChar *string);
- void* DoGet( const wxChar* key ) const
- {
- wxASSERT( m_keyType == wxKEY_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 );
- wxHashKeyValue k; k.string = (wxChar*)key;
- wxHashTableBaseBase::const_iterator it = m_map.find( k );
+private:
+ // Remove the node from the hash, *only called from
+ // ~wxHashTable*_Node destructor
+ void DoRemoveNode( wxHashTableBase_Node* node );
- return it != m_map.end() ? it->second : NULL;
- }
+ // 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 );
- void* DoDelete( long key )
- {
- wxASSERT( m_keyType == wxKEY_INTEGER );
+ // inserts a node in the table (at the end of the chain)
+ void DoInsertNode( size_t bucket, wxHashTableBase_Node* node );
- wxHashKeyValue k; k.integer = key;
- wxHashTableBaseBase::iterator it = m_map.find( k );
-
- if( it != m_map.end() )
- {
- void* data = it->second;
+ // 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 );
- m_map.erase( it );
- return data;
- }
+ // unconditionally deletes node value (invoking the
+ // correct destructor)
+ virtual void DoDeleteContents( wxHashTableBase_Node* node ) = 0;
- return NULL;
- }
+protected:
+ // number of buckets
+ size_t m_size;
- void* DoDelete( const wxChar* key )
- {
- wxASSERT( m_keyType == wxKEY_STRING );
+ // number of nodes (key/value pairs)
+ size_t m_count;
- wxHashKeyValue k; k.string = (wxChar*)key;
- wxHashTableBaseBase::iterator it = m_map.find( k );
-
- if( it != m_map.end() )
- {
- void* data = it->second;
- wxChar* k = it->first.string;
+ // table
+ Node** m_table;
- m_map.erase( it );
- delete[] k;
- return data;
- }
+ // key typ (INTEGER/STRING)
+ wxKeyType m_keyType;
- return NULL;
- }
+ // delete contents when hash is cleared
+ bool m_deleteContents;
- wxHashTableBaseBase m_map;
- wxKeyType m_keyType;
+private:
+ DECLARE_NO_COPY_CLASS(wxHashTableBase)
};
-#endif // !wxUSE_STL
+#endif // wxUSE_OLD_HASH_TABLE
#if !wxUSE_STL
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;
- // remove the item, returning TRUE if the item was found and deleted
+ // remove the item, returning true if the item was found and deleted
bool Delete(long key) const;
// clean up
#endif // WXWIN_COMPATIBILITY_2_4
-#endif // !wxUSE_STL
+#endif // !wxUSE_STL
// ----------------------------------------------------------------------------
// for compatibility only
// ----------------------------------------------------------------------------
-#if wxUSE_STL
+#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(); }
+};
-class WXDLLIMPEXP_BASE wxHashTable : protected wxHashTableBase
+// should inherit protectedly, but it is public for compatibility in
+// order to publicly inherit from wxObject
+class WXDLLIMPEXP_BASE wxHashTable : public wxHashTableBase
{
- typedef wxHashTableBaseBase hash;
+ typedef wxHashTableBase hash;
public:
- class dummy;
-
- struct compatibility_iterator
- {
- hash::iterator m_iter;
- hash* m_hash;
-
- operator bool() const { return m_iter != m_hash->end(); }
- bool operator !() const { return m_iter == m_hash->end(); }
- compatibility_iterator( hash* li, hash::iterator it )
- : m_iter( it ), m_hash( li ) {}
- compatibility_iterator() { }
-
- dummy* operator->() { return (dummy*)this; }
- };
- typedef compatibility_iterator citer;
-
- class dummy
- {
- typedef hash::iterator it;
- typedef compatibility_iterator citer;
- public:
- wxObject* GetData() const
- {
- citer* i = (citer*)this;
- return (wxObject*)i->m_iter->second;
- }
- citer GetNext() const
- {
- citer* i = (citer*)this;
- it lit = i->m_iter;
- return citer( i->m_hash, ++lit );
- }
- void SetData( wxObject* e )
- {
- citer* i = (citer*)this;
- i->m_iter->second = e;
- }
- private:
- dummy();
- };
+ typedef wxHashTable_Node Node;
+ typedef wxHashTable_Node* compatibility_iterator;
public:
wxHashTable( wxKeyType keyType = wxKEY_INTEGER,
size_t size = wxHASH_SIZE_DEFAULT )
- : wxHashTableBase( keyType, size ) { }
+ : wxHashTableBase() { Create( keyType, size ); BeginFind(); }
+ wxHashTable( const wxHashTable& table );
+
+ virtual ~wxHashTable() { Destroy(); }
- void Destroy() { Clear(); }
+ const wxHashTable& operator=( const wxHashTable& );
// key and value are the same
- void Put(long value, wxObject *object) { DoPut( value, object ); }
- void Put(const wxChar *value, wxObject *object) { DoPut( value, object ); }
+ 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 ); }
- wxObject *Get(const wxChar *value) const { return (wxObject*)DoGet( value ); }
+ 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*)DoGet( key ); }
- wxObject *Delete(const wxChar *key) { return (wxObject*)DoGet( key ); }
+ 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 ); }
-#if 0
// 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;
-#endif
+ 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_iter = citer( &this->m_map, this->m_map.begin() ); }
- compatibility_iterator Next()
- {
- compatibility_iterator it = m_iter;
- if( m_iter )
- m_iter = m_iter->GetNext();
- return it;
- }
+ 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:
- compatibility_iterator m_iter;
+ virtual void DoDeleteContents( wxHashTableBase_Node* node );
+
+ // current node
+ Node* m_curr;
+
+ // bucket the current node belongs to
+ size_t m_currBucket;
};
-#else // if !wxUSE_STL
+#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;
// objects maintained separately
void BeginFind();
- wxNode *Next();
+ Node* Next();
void DeleteContents(bool flag);
void Clear();
// Returns number of nodes
size_t GetCount() const { return m_count; }
- typedef wxNode* compatibility_iterator;
private:
size_t m_count; // number of elements in the hashtable
bool m_deleteContents;
DECLARE_DYNAMIC_CLASS(wxHashTable)
};
-#endif
+#endif // wxUSE_OLD_HASH_TABLE
-#if wxUSE_STL
+#if !wxUSE_OLD_HASH_TABLE
// defines a new type safe hash table which stores the elements of type eltype
// in lists of class listclass
public: \
hashclass(wxKeyType keyType = wxKEY_INTEGER, \
size_t size = wxHASH_SIZE_DEFAULT) \
- : wxHashTableBase(keyType, size) { } \
+ : wxHashTableBase() { Create(keyType, size); } \
\
- ~hashclass() { Destroy(); } \
+ virtual ~hashclass() { Destroy(); } \
\
- void Destroy() { m_map.clear(); } \
- void Put(long key, eltype *data) { DoPut(key, (void*)data); } \
- eltype *Get(long key) const { return (eltype*)DoGet(key); } \
- eltype *Delete(long key) { return (eltype*)DoDelete(key); } \
+ 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_STL
+#else // if wxUSE_OLD_HASH_TABLE
#define _WX_DECLARE_HASH(eltype, listclass, hashclass, classexp) \
classexp hashclass : public wxHashTableBase \
{ \
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); \
DECLARE_NO_COPY_CLASS(hashclass) \
}
-#endif
+#endif // wxUSE_OLD_HASH_TABLE
// this macro is to be used in the user code
#define WX_DECLARE_HASH(el, list, hash) \
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