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wxWidgets/include/wx/hashmap.h

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/////////////////////////////////////////////////////////////////////////////
// Name: wx/hashmap.h
// Purpose: wxHashMap class
// Author: Mattia Barbon
// Modified by:
// Created: 29/01/2002
// RCS-ID: $Id$
// Copyright: (c) Mattia Barbon
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_HASHMAP_H_
#define _WX_HASHMAP_H_
#include "wx/string.h"
#include "wx/wxcrt.h"
// In wxUSE_STL build we prefer to use the standard hash map class but it can
// be either in non-standard hash_map header (old g++ and some other STL
// implementations) or in C++0x standard unordered_map which can in turn be
// available either in std::tr1 or std namespace itself
//
// To summarize: if std::unordered_map is available use it, otherwise use tr1
// and finally fall back to non-standard hash_map
#if (defined(HAVE_EXT_HASH_MAP) || defined(HAVE_HASH_MAP)) \
&& (defined(HAVE_GNU_CXX_HASH_MAP) || defined(HAVE_STD_HASH_MAP))
#define HAVE_STL_HASH_MAP
#endif
#if wxUSE_STL && \
(defined(HAVE_STD_UNORDERED_MAP) || defined(HAVE_TR1_UNORDERED_MAP))
#if defined(HAVE_STD_UNORDERED_MAP)
#include <unordered_map>
#define WX_HASH_MAP_NAMESPACE std
#elif defined(HAVE_TR1_UNORDERED_MAP)
#include <tr1/unordered_map>
#define WX_HASH_MAP_NAMESPACE std::tr1
#endif
#define _WX_DECLARE_HASH_MAP( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, CLASSNAME, CLASSEXP ) \
typedef WX_HASH_MAP_NAMESPACE::unordered_map< KEY_T, VALUE_T, HASH_T, KEY_EQ_T > CLASSNAME
#elif wxUSE_STL && defined(HAVE_STL_HASH_MAP)
#if defined(HAVE_EXT_HASH_MAP)
#include <ext/hash_map>
#elif defined(HAVE_HASH_MAP)
#include <hash_map>
#endif
#if defined(HAVE_GNU_CXX_HASH_MAP)
#define WX_HASH_MAP_NAMESPACE __gnu_cxx
#elif defined(HAVE_STD_HASH_MAP)
#define WX_HASH_MAP_NAMESPACE std
#endif
#define _WX_DECLARE_HASH_MAP( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, CLASSNAME, CLASSEXP ) \
typedef WX_HASH_MAP_NAMESPACE::hash_map< KEY_T, VALUE_T, HASH_T, KEY_EQ_T > CLASSNAME
#else // !wxUSE_STL || no std::{hash,unordered}_map class available
#define wxNEEDS_WX_HASH_MAP
#ifdef __WXWINCE__
typedef int ptrdiff_t;
#else
#include <stddef.h> // for ptrdiff_t
#endif
// private
struct WXDLLIMPEXP_BASE _wxHashTable_NodeBase
{
_wxHashTable_NodeBase() : m_next(NULL) {}
_wxHashTable_NodeBase* m_next;
// Cannot do this:
// DECLARE_NO_COPY_CLASS(_wxHashTable_NodeBase)
// without rewriting the macros, which require a public copy constructor.
};
// private
class WXDLLIMPEXP_BASE _wxHashTableBase2
{
public:
typedef void (*NodeDtor)(_wxHashTable_NodeBase*);
typedef unsigned long (*BucketFromNode)(_wxHashTableBase2*,_wxHashTable_NodeBase*);
typedef _wxHashTable_NodeBase* (*ProcessNode)(_wxHashTable_NodeBase*);
protected:
static _wxHashTable_NodeBase* DummyProcessNode(_wxHashTable_NodeBase* node);
static void DeleteNodes( size_t buckets, _wxHashTable_NodeBase** table,
NodeDtor dtor );
static _wxHashTable_NodeBase* GetFirstNode( size_t buckets,
_wxHashTable_NodeBase** table )
{
for( size_t i = 0; i < buckets; ++i )
if( table[i] )
return table[i];
return NULL;
}
// as static const unsigned prime_count = 31 but works with all compilers
enum { prime_count = 31 };
static const unsigned long ms_primes[prime_count];
// returns the first prime in ms_primes greater than n
static unsigned long GetNextPrime( unsigned long n );
// returns the first prime in ms_primes smaller than n
// ( or ms_primes[0] if n is very small )
static unsigned long GetPreviousPrime( unsigned long n );
static void CopyHashTable( _wxHashTable_NodeBase** srcTable,
size_t srcBuckets, _wxHashTableBase2* dst,
_wxHashTable_NodeBase** dstTable,
BucketFromNode func, ProcessNode proc );
static void** AllocTable( size_t sz )
{
return (void **)calloc(sz, sizeof(void*));
}
static void FreeTable(void *table)
{
free(table);
}
};
#define _WX_DECLARE_HASHTABLE( VALUE_T, KEY_T, HASH_T, KEY_EX_T, KEY_EQ_T, CLASSNAME, CLASSEXP, SHOULD_GROW, SHOULD_SHRINK ) \
CLASSEXP CLASSNAME : protected _wxHashTableBase2 \
{ \
public: \
typedef KEY_T key_type; \
typedef VALUE_T value_type; \
typedef HASH_T hasher; \
typedef KEY_EQ_T key_equal; \
\
typedef size_t size_type; \
typedef ptrdiff_t difference_type; \
typedef value_type* pointer; \
typedef const value_type* const_pointer; \
typedef value_type& reference; \
typedef const value_type& const_reference; \
/* should these be protected? */ \
typedef const KEY_T const_key_type; \
typedef const VALUE_T const_mapped_type; \
public: \
typedef KEY_EX_T key_extractor; \
typedef CLASSNAME Self; \
protected: \
_wxHashTable_NodeBase** m_table; \
size_t m_tableBuckets; \
size_t m_items; \
hasher m_hasher; \
key_equal m_equals; \
key_extractor m_getKey; \
public: \
struct Node:public _wxHashTable_NodeBase \
{ \
public: \
Node( const value_type& value ) \
: m_value( value ) {} \
Node* next() { return wx_static_cast(Node*, m_next); } \
\
value_type m_value; \
}; \
\
protected: \
static void DeleteNode( _wxHashTable_NodeBase* node ) \
{ \
delete wx_static_cast(Node*, node); \
} \
public: \
/* */ \
/* forward iterator */ \
/* */ \
CLASSEXP Iterator \
{ \
public: \
Node* m_node; \
Self* m_ht; \
\
Iterator() : m_node(NULL), m_ht(NULL) {} \
Iterator( Node* node, const Self* ht ) \
: m_node(node), m_ht(wx_const_cast(Self*, ht)) {} \
bool operator ==( const Iterator& it ) const \
{ return m_node == it.m_node; } \
bool operator !=( const Iterator& it ) const \
{ return m_node != it.m_node; } \
protected: \
Node* GetNextNode() \
{ \
size_type bucket = GetBucketForNode(m_ht,m_node); \
for( size_type i = bucket + 1; i < m_ht->m_tableBuckets; ++i ) \
{ \
if( m_ht->m_table[i] ) \
return wx_static_cast(Node*, m_ht->m_table[i]); \
} \
return NULL; \
} \
\
void PlusPlus() \
{ \
Node* next = m_node->next(); \
m_node = next ? next : GetNextNode(); \
} \
}; \
friend class Iterator; \
\
public: \
CLASSEXP iterator : public Iterator \
{ \
public: \
iterator() : Iterator() {} \
iterator( Node* node, Self* ht ) : Iterator( node, ht ) {} \
iterator& operator++() { PlusPlus(); return *this; } \
iterator operator++(int) { iterator it=*this;PlusPlus();return it; } \
reference operator *() const { return m_node->m_value; } \
pointer operator ->() const { return &(m_node->m_value); } \
}; \
\
CLASSEXP const_iterator : public Iterator \
{ \
public: \
const_iterator() : Iterator() {} \
const_iterator(iterator i) : Iterator(i) {} \
const_iterator( Node* node, const Self* ht ) \
: Iterator(node, wx_const_cast(Self*, ht)) {} \
const_iterator& operator++() { PlusPlus();return *this; } \
const_iterator operator++(int) { const_iterator it=*this;PlusPlus();return it; } \
const_reference operator *() const { return m_node->m_value; } \
const_pointer operator ->() const { return &(m_node->m_value); } \
}; \
\
CLASSNAME( size_type sz = 10, const hasher& hfun = hasher(), \
const key_equal& k_eq = key_equal(), \
const key_extractor& k_ex = key_extractor() ) \
: m_tableBuckets( GetNextPrime( (unsigned long) sz ) ), \
m_items( 0 ), \
m_hasher( hfun ), \
m_equals( k_eq ), \
m_getKey( k_ex ) \
{ \
m_table = (_wxHashTable_NodeBase**)AllocTable(m_tableBuckets); \
} \
\
CLASSNAME( const Self& ht ) \
: m_table(NULL), \
m_tableBuckets( 0 ), \
m_items( ht.m_items ), \
m_hasher( ht.m_hasher ), \
m_equals( ht.m_equals ), \
m_getKey( ht.m_getKey ) \
{ \
HashCopy( ht ); \
} \
\
const Self& operator=( const Self& ht ) \
{ \
if (&ht != this) \
{ \
clear(); \
m_hasher = ht.m_hasher; \
m_equals = ht.m_equals; \
m_getKey = ht.m_getKey; \
m_items = ht.m_items; \
HashCopy( ht ); \
} \
return *this; \
} \
\
~CLASSNAME() \
{ \
clear(); \
\
FreeTable(m_table); \
} \
\
hasher hash_funct() { return m_hasher; } \
key_equal key_eq() { return m_equals; } \
\
/* removes all elements from the hash table, but does not */ \
/* shrink it ( perhaps it should ) */ \
void clear() \
{ \
DeleteNodes(m_tableBuckets, m_table, DeleteNode); \
m_items = 0; \
} \
\
size_type size() const { return m_items; } \
size_type max_size() const { return size_type(-1); } \
bool empty() const { return size() == 0; } \
\
const_iterator end() const { return const_iterator(NULL, this); } \
iterator end() { return iterator(NULL, this); } \
const_iterator begin() const \
{ return const_iterator(wx_static_cast(Node*, GetFirstNode(m_tableBuckets, m_table)), this); } \
iterator begin() \
{ return iterator(wx_static_cast(Node*, GetFirstNode(m_tableBuckets, m_table)), this); } \
\
size_type erase( const const_key_type& key ) \
{ \
_wxHashTable_NodeBase** node = GetNodePtr(key); \
\
if( !node ) \
return 0; \
\
--m_items; \
_wxHashTable_NodeBase* temp = (*node)->m_next; \
delete wx_static_cast(Node*, *node); \
(*node) = temp; \
if( SHOULD_SHRINK( m_tableBuckets, m_items ) ) \
ResizeTable( GetPreviousPrime( (unsigned long) m_tableBuckets ) - 1 ); \
return 1; \
} \
\
protected: \
static size_type GetBucketForNode( Self* ht, Node* node ) \
{ \
return ht->m_hasher( ht->m_getKey( node->m_value ) ) \
% ht->m_tableBuckets; \
} \
static Node* CopyNode( Node* node ) { return new Node( *node ); } \
\
Node* GetOrCreateNode( const value_type& value, bool& created ) \
{ \
const const_key_type& key = m_getKey( value ); \
size_t bucket = m_hasher( key ) % m_tableBuckets; \
Node* node = wx_static_cast(Node*, m_table[bucket]); \
\
while( node ) \
{ \
if( m_equals( m_getKey( node->m_value ), key ) ) \
{ \
created = false; \
return node; \
} \
node = node->next(); \
} \
created = true; \
return CreateNode( value, bucket); \
}\
Node * CreateNode( const value_type& value, size_t bucket ) \
{\
Node* node = new Node( value ); \
node->m_next = m_table[bucket]; \
m_table[bucket] = node; \
\
/* must be after the node is inserted */ \
++m_items; \
if( SHOULD_GROW( m_tableBuckets, m_items ) ) \
ResizeTable( m_tableBuckets ); \
\
return node; \
} \
void CreateNode( const value_type& value ) \
{\
CreateNode(value, m_hasher( m_getKey(value) ) % m_tableBuckets ); \
}\
\
/* returns NULL if not found */ \
_wxHashTable_NodeBase** GetNodePtr(const const_key_type& key) const \
{ \
size_t bucket = m_hasher( key ) % m_tableBuckets; \
_wxHashTable_NodeBase** node = &m_table[bucket]; \
\
while( *node ) \
{ \
if (m_equals(m_getKey(wx_static_cast(Node*, *node)->m_value), key)) \
return node; \
node = &(*node)->m_next; \
} \
\
return NULL; \
} \
\
/* returns NULL if not found */ \
/* expressing it in terms of GetNodePtr is 5-8% slower :-( */ \
Node* GetNode( const const_key_type& key ) const \
{ \
size_t bucket = m_hasher( key ) % m_tableBuckets; \
Node* node = wx_static_cast(Node*, m_table[bucket]); \
\
while( node ) \
{ \
if( m_equals( m_getKey( node->m_value ), key ) ) \
return node; \
node = node->next(); \
} \
\
return NULL; \
} \
\
void ResizeTable( size_t newSize ) \
{ \
newSize = GetNextPrime( (unsigned long)newSize ); \
_wxHashTable_NodeBase** srcTable = m_table; \
size_t srcBuckets = m_tableBuckets; \
m_table = (_wxHashTable_NodeBase**)AllocTable( newSize ); \
m_tableBuckets = newSize; \
\
CopyHashTable( srcTable, srcBuckets, \
this, m_table, \
(BucketFromNode)GetBucketForNode,\
(ProcessNode)&DummyProcessNode ); \
FreeTable(srcTable); \
} \
\
/* this must be called _after_ m_table has been cleaned */ \
void HashCopy( const Self& ht ) \
{ \
ResizeTable( ht.size() ); \
CopyHashTable( ht.m_table, ht.m_tableBuckets, \
(_wxHashTableBase2*)this, \
m_table, \
(BucketFromNode)GetBucketForNode, \
(ProcessNode)CopyNode ); \
} \
};
// defines an STL-like pair class CLASSNAME storing two fields: first of type
// KEY_T and second of type VALUE_T
#define _WX_DECLARE_PAIR( KEY_T, VALUE_T, CLASSNAME, CLASSEXP ) \
CLASSEXP CLASSNAME \
{ \
public: \
typedef KEY_T t1; \
typedef VALUE_T t2; \
typedef const KEY_T const_t1; \
typedef const VALUE_T const_t2; \
\
CLASSNAME(const const_t1& f, const const_t2& s) \
: first(wx_const_cast(t1&, f)), second(wx_const_cast(t2&, s)) {} \
\
t1 first; \
t2 second; \
};
// defines the class CLASSNAME returning the key part (of type KEY_T) from a
// pair of type PAIR_T
#define _WX_DECLARE_HASH_MAP_KEY_EX( KEY_T, PAIR_T, CLASSNAME, CLASSEXP ) \
CLASSEXP CLASSNAME \
{ \
typedef KEY_T key_type; \
typedef PAIR_T pair_type; \
typedef const key_type const_key_type; \
typedef const pair_type const_pair_type; \
typedef const_key_type& const_key_reference; \
typedef const_pair_type& const_pair_reference; \
public: \
CLASSNAME() { } \
const_key_reference operator()( const_pair_reference pair ) const { return pair.first; }\
\
/* the dummy assignment operator is needed to suppress compiler */ \
/* warnings from hash table class' operator=(): gcc complains about */ \
/* "statement with no effect" without it */ \
CLASSNAME& operator=(const CLASSNAME&) { return *this; } \
};
// grow/shrink predicates
inline bool never_grow( size_t, size_t ) { return false; }
inline bool never_shrink( size_t, size_t ) { return false; }
inline bool grow_lf70( size_t buckets, size_t items )
{
return float(items)/float(buckets) >= 0.85;
}
#endif // various hash map implementations
// ----------------------------------------------------------------------------
// hashing and comparison functors
// ----------------------------------------------------------------------------
// NB: implementation detail: all of these classes must have dummy assignment
// operators to suppress warnings about "statement with no effect" from gcc
// in the hash table class assignment operator (where they're assigned)
#ifndef wxNEEDS_WX_HASH_MAP
// integer types
class WXDLLIMPEXP_BASE wxIntegerHash
{
WX_HASH_MAP_NAMESPACE::hash<long> longHash;
WX_HASH_MAP_NAMESPACE::hash<unsigned long> ulongHash;
WX_HASH_MAP_NAMESPACE::hash<int> intHash;
WX_HASH_MAP_NAMESPACE::hash<unsigned int> uintHash;
WX_HASH_MAP_NAMESPACE::hash<short> shortHash;
WX_HASH_MAP_NAMESPACE::hash<unsigned short> ushortHash;
#if defined wxLongLong_t && !defined wxLongLongIsLong
// hash<wxLongLong_t> ought to work but doesn't on some compilers
#if (!defined SIZEOF_LONG_LONG && SIZEOF_LONG == 4) \
|| (defined SIZEOF_LONG_LONG && SIZEOF_LONG_LONG == SIZEOF_LONG * 2)
size_t longlongHash( wxLongLong_t x ) const
{
return longHash( wx_truncate_cast(long, x) ) ^
longHash( wx_truncate_cast(long, x >> (sizeof(long) * 8)) );
}
#elif defined SIZEOF_LONG_LONG && SIZEOF_LONG_LONG == SIZEOF_LONG
WX_HASH_MAP_NAMESPACE::hash<long> longlongHash;
#else
WX_HASH_MAP_NAMESPACE::hash<wxLongLong_t> longlongHash;
#endif
#endif
public:
wxIntegerHash() { }
size_t operator()( long x ) const { return longHash( x ); }
size_t operator()( unsigned long x ) const { return ulongHash( x ); }
size_t operator()( int x ) const { return intHash( x ); }
size_t operator()( unsigned int x ) const { return uintHash( x ); }
size_t operator()( short x ) const { return shortHash( x ); }
size_t operator()( unsigned short x ) const { return ushortHash( x ); }
#if defined wxLongLong_t && !defined wxLongLongIsLong
size_t operator()( wxLongLong_t x ) const { return longlongHash(x); }
size_t operator()( wxULongLong_t x ) const { return longlongHash(x); }
#endif
wxIntegerHash& operator=(const wxIntegerHash&) { return *this; }
};
#else // wxNEEDS_WX_HASH_MAP
// integer types
class WXDLLIMPEXP_BASE wxIntegerHash
{
public:
wxIntegerHash() { }
unsigned long operator()( long x ) const { return (unsigned long)x; }
unsigned long operator()( unsigned long x ) const { return x; }
unsigned long operator()( int x ) const { return (unsigned long)x; }
unsigned long operator()( unsigned int x ) const { return x; }
unsigned long operator()( short x ) const { return (unsigned long)x; }
unsigned long operator()( unsigned short x ) const { return x; }
#if defined wxLongLong_t && !defined wxLongLongIsLong
wxULongLong_t operator()( wxLongLong_t x ) const { return wx_static_cast(wxULongLong_t, x); }
wxULongLong_t operator()( wxULongLong_t x ) const { return x; }
#endif
wxIntegerHash& operator=(const wxIntegerHash&) { return *this; }
};
#endif // !wxNEEDS_WX_HASH_MAP/wxNEEDS_WX_HASH_MAP
class WXDLLIMPEXP_BASE wxIntegerEqual
{
public:
wxIntegerEqual() { }
bool operator()( long a, long b ) const { return a == b; }
bool operator()( unsigned long a, unsigned long b ) const { return a == b; }
bool operator()( int a, int b ) const { return a == b; }
bool operator()( unsigned int a, unsigned int b ) const { return a == b; }
bool operator()( short a, short b ) const { return a == b; }
bool operator()( unsigned short a, unsigned short b ) const { return a == b; }
#if defined wxLongLong_t && !defined wxLongLongIsLong
bool operator()( wxLongLong_t a, wxLongLong_t b ) const { return a == b; }
bool operator()( wxULongLong_t a, wxULongLong_t b ) const { return a == b; }
#endif
wxIntegerEqual& operator=(const wxIntegerEqual&) { return *this; }
};
// pointers
class WXDLLIMPEXP_BASE wxPointerHash
{
public:
wxPointerHash() { }
#ifdef wxNEEDS_WX_HASH_MAP
wxUIntPtr operator()( const void* k ) const { return wxPtrToUInt(k); }
#else
size_t operator()( const void* k ) const { return (size_t)k; }
#endif
wxPointerHash& operator=(const wxPointerHash&) { return *this; }
};
class WXDLLIMPEXP_BASE wxPointerEqual
{
public:
wxPointerEqual() { }
bool operator()( const void* a, const void* b ) const { return a == b; }
wxPointerEqual& operator=(const wxPointerEqual&) { return *this; }
};
// wxString, char*, wchar_t*
class WXDLLIMPEXP_BASE wxStringHash
{
public:
wxStringHash() {}
unsigned long operator()( const wxString& x ) const
{ return stringHash( x.wx_str() ); }
unsigned long operator()( const wchar_t* x ) const
{ return stringHash( x ); }
unsigned long operator()( const char* x ) const
{ return stringHash( x ); }
#if WXWIN_COMPATIBILITY_2_8
static unsigned long wxCharStringHash( const wxChar* x )
{ return stringHash(x); }
#if wxUSE_UNICODE
static unsigned long charStringHash( const char* x )
{ return stringHash(x); }
#endif
#endif // WXWIN_COMPATIBILITY_2_8
static unsigned long stringHash( const wchar_t* );
static unsigned long stringHash( const char* );
wxStringHash& operator=(const wxStringHash&) { return *this; }
};
class WXDLLIMPEXP_BASE wxStringEqual
{
public:
wxStringEqual() {}
bool operator()( const wxString& a, const wxString& b ) const
{ return a == b; }
bool operator()( const wxChar* a, const wxChar* b ) const
{ return wxStrcmp( a, b ) == 0; }
#if wxUSE_UNICODE
bool operator()( const char* a, const char* b ) const
{ return strcmp( a, b ) == 0; }
#endif // wxUSE_UNICODE
wxStringEqual& operator=(const wxStringEqual&) { return *this; }
};
#ifdef wxNEEDS_WX_HASH_MAP
#define _WX_DECLARE_HASH_MAP( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, CLASSNAME, CLASSEXP ) \
_WX_DECLARE_PAIR( KEY_T, VALUE_T, CLASSNAME##_wxImplementation_Pair, CLASSEXP ) \
_WX_DECLARE_HASH_MAP_KEY_EX( KEY_T, CLASSNAME##_wxImplementation_Pair, CLASSNAME##_wxImplementation_KeyEx, CLASSEXP ) \
_WX_DECLARE_HASHTABLE( CLASSNAME##_wxImplementation_Pair, KEY_T, HASH_T, CLASSNAME##_wxImplementation_KeyEx, KEY_EQ_T, CLASSNAME##_wxImplementation_HashTable, CLASSEXP, grow_lf70, never_shrink ) \
CLASSEXP CLASSNAME:public CLASSNAME##_wxImplementation_HashTable \
{ \
public: \
typedef VALUE_T mapped_type; \
_WX_DECLARE_PAIR( iterator, bool, Insert_Result, CLASSEXP ) \
\
wxEXPLICIT CLASSNAME( size_type hint = 100, hasher hf = hasher(), \
key_equal eq = key_equal() ) \
: CLASSNAME##_wxImplementation_HashTable( hint, hf, eq, \
CLASSNAME##_wxImplementation_KeyEx() ) {} \
\
mapped_type& operator[]( const const_key_type& key ) \
{ \
bool created; \
return GetOrCreateNode( \
CLASSNAME##_wxImplementation_Pair( key, mapped_type() ), \
created)->m_value.second; \
} \
\
const_iterator find( const const_key_type& key ) const \
{ \
return const_iterator( GetNode( key ), this ); \
} \
\
iterator find( const const_key_type& key ) \
{ \
return iterator( GetNode( key ), this ); \
} \
\
Insert_Result insert( const value_type& v ) \
{ \
bool created; \
Node *node = GetOrCreateNode( \
CLASSNAME##_wxImplementation_Pair( v.first, v.second ), \
created); \
if ( !created ) \
node->m_value.second = v.second; \
return Insert_Result(iterator(node, this), created); \
} \
\
size_type erase( const key_type& k ) \
{ return CLASSNAME##_wxImplementation_HashTable::erase( k ); } \
void erase( const iterator& it ) { erase( it->first ); } \
void erase( const const_iterator& it ) { erase( it->first ); } \
\
/* count() == 0 | 1 */ \
size_type count( const const_key_type& key ) \
{ \
/* explicit cast needed to suppress CodeWarrior warnings */ \
return (size_type)(GetNode( key ) ? 1 : 0); \
} \
}
#endif // wxNEEDS_WX_HASH_MAP
// these macros are to be used in the user code
#define WX_DECLARE_HASH_MAP( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, CLASSNAME) \
_WX_DECLARE_HASH_MAP( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, CLASSNAME, class )
#define WX_DECLARE_STRING_HASH_MAP( VALUE_T, CLASSNAME ) \
_WX_DECLARE_HASH_MAP( wxString, VALUE_T, wxStringHash, wxStringEqual, \
CLASSNAME, class )
#define WX_DECLARE_VOIDPTR_HASH_MAP( VALUE_T, CLASSNAME ) \
_WX_DECLARE_HASH_MAP( void*, VALUE_T, wxPointerHash, wxPointerEqual, \
CLASSNAME, class )
// and these do exactly the same thing but should be used inside the
// library
#define WX_DECLARE_HASH_MAP_WITH_DECL( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, CLASSNAME, DECL) \
_WX_DECLARE_HASH_MAP( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, CLASSNAME, DECL )
#define WX_DECLARE_EXPORTED_HASH_MAP( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, CLASSNAME) \
WX_DECLARE_HASH_MAP_WITH_DECL( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, \
CLASSNAME, class WXDLLIMPEXP_CORE )
#define WX_DECLARE_STRING_HASH_MAP_WITH_DECL( VALUE_T, CLASSNAME, DECL ) \
_WX_DECLARE_HASH_MAP( wxString, VALUE_T, wxStringHash, wxStringEqual, \
CLASSNAME, DECL )
#define WX_DECLARE_EXPORTED_STRING_HASH_MAP( VALUE_T, CLASSNAME ) \
WX_DECLARE_STRING_HASH_MAP_WITH_DECL( VALUE_T, CLASSNAME, \
class WXDLLIMPEXP_CORE )
#define WX_DECLARE_VOIDPTR_HASH_MAP_WITH_DECL( VALUE_T, CLASSNAME, DECL ) \
_WX_DECLARE_HASH_MAP( void*, VALUE_T, wxPointerHash, wxPointerEqual, \
CLASSNAME, DECL )
#define WX_DECLARE_EXPORTED_VOIDPTR_HASH_MAP( VALUE_T, CLASSNAME ) \
WX_DECLARE_VOIDPTR_HASH_MAP_WITH_DECL( VALUE_T, CLASSNAME, \
class WXDLLIMPEXP_CORE )
// 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_MAP(type, hashmap) \
{ \
type::iterator it, en; \
for( it = (hashmap).begin(), en = (hashmap).end(); it != en; ++it ) \
delete it->second; \
(hashmap).clear(); \
}
//---------------------------------------------------------------------------
// Declarations of common hashmap classes
WX_DECLARE_HASH_MAP_WITH_DECL( long, long, wxIntegerHash, wxIntegerEqual,
wxLongToLongHashMap, class WXDLLIMPEXP_BASE );
#endif // _WX_HASHMAP_H_
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