X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0508ba2a6b5806ce54ba290d9c651d09433e15a9..89e1de6441845de971433531a7286d5bea06c3f5:/include/wx/hashmap.h diff --git a/include/wx/hashmap.h b/include/wx/hashmap.h index 5bc36a2874..252df7885d 100644 --- a/include/wx/hashmap.h +++ b/include/wx/hashmap.h @@ -1,8 +1,8 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: hashmap.cpp +// Name: wx/hashmap.h // Purpose: wxHashMap class // Author: Mattia Barbon -// Modified by: +// Modified by: // Created: 29/01/2002 // RCS-ID: $Id$ // Copyright: (c) Mattia Barbon @@ -12,26 +12,81 @@ #ifndef _WX_HASHMAP_H_ #define _WX_HASHMAP_H_ -#ifdef __GNUG__ -#pragma interface "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 -#include +#if wxUSE_STL && \ + (defined(HAVE_STD_UNORDERED_MAP) || defined(HAVE_TR1_UNORDERED_MAP)) + +#if defined(HAVE_STD_UNORDERED_MAP) + #include + #define WX_HASH_MAP_NAMESPACE std +#elif defined(HAVE_TR1_UNORDERED_MAP) + #include + #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 +#elif defined(HAVE_HASH_MAP) + #include +#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 // for ptrdiff_t +#endif // private -struct _wxHashTable_NodeBase +struct WXDLLIMPEXP_BASE _wxHashTable_NodeBase { - _wxHashTable_NodeBase() : m_nxt(0) {} + _wxHashTable_NodeBase() : m_next(NULL) {} + + _wxHashTable_NodeBase* m_next; - _wxHashTable_NodeBase* m_nxt; +// Cannot do this: +// wxDECLARE_NO_COPY_CLASS(_wxHashTable_NodeBase); +// without rewriting the macros, which require a public copy constructor. }; // private -class _wxHashTableBase2 +class WXDLLIMPEXP_BASE _wxHashTableBase2 { public: typedef void (*NodeDtor)(_wxHashTable_NodeBase*); - typedef unsigned long (*BucketFromNode)(_wxHashTableBase2*,_wxHashTable_NodeBase*); + typedef unsigned long (*BucketFromNode)(_wxHashTableBase2*,_wxHashTable_NodeBase*); typedef _wxHashTable_NodeBase* (*ProcessNode)(_wxHashTable_NodeBase*); protected: static _wxHashTable_NodeBase* DummyProcessNode(_wxHashTable_NodeBase* node); @@ -43,18 +98,18 @@ protected: for( size_t i = 0; i < buckets; ++i ) if( table[i] ) return table[i]; - return 0; + return NULL; } - /* static const unsigned prime_count = 31; */ + // as static const unsigned prime_count = 31 but works with all compilers enum { prime_count = 31 }; - static const unsigned long s_primes[prime_count]; + static const unsigned long ms_primes[prime_count]; - /* returns the first prime in s_primes greater than n */ + // returns the first prime in ms_primes greater than n static unsigned long GetNextPrime( unsigned long n ); - /* returns the first prime in s_primes smaller than n */ - /* ( or s_primes[0] if n is very small ) */ + // 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, @@ -62,19 +117,18 @@ protected: _wxHashTable_NodeBase** dstTable, BucketFromNode func, ProcessNode proc ); - /* maybe just use calloc */ - static void** AllocTable( size_t size ) + static void** AllocTable( size_t sz ) { - void** table = new void*[size]; - - memset( table, 0, size * sizeof(void*) ); - - return table; + 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 \ +CLASSEXP CLASSNAME : protected _wxHashTableBase2 \ { \ public: \ typedef KEY_T key_type; \ @@ -91,47 +145,45 @@ public: \ /* should these be protected? */ \ typedef const KEY_T const_key_type; \ typedef const VALUE_T const_mapped_type; \ -protected: \ - struct Node; \ +public: \ typedef KEY_EX_T key_extractor; \ typedef CLASSNAME Self; \ - \ - Node** m_table; \ +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* m_next() { return (Node*)this->m_nxt; } \ + Node* next() { return static_cast(m_next); } \ \ value_type m_value; \ }; \ \ - struct Iterator; \ - friend struct CLASSNAME::Iterator; \ - \ +protected: \ static void DeleteNode( _wxHashTable_NodeBase* node ) \ { \ - delete (Node*)node; \ + delete static_cast(node); \ } \ - \ +public: \ /* */ \ /* forward iterator */ \ /* */ \ - struct Iterator \ + CLASSEXP Iterator \ { \ + public: \ Node* m_node; \ Self* m_ht; \ \ - Iterator() : m_node(0), m_ht(0) {} \ + Iterator() : m_node(NULL), m_ht(NULL) {} \ Iterator( Node* node, const Self* ht ) \ - : m_node(node), m_ht((Self*)ht) {} \ + : m_node(node), m_ht(const_cast(ht)) {} \ bool operator ==( const Iterator& it ) const \ { return m_node == it.m_node; } \ bool operator !=( const Iterator& it ) const \ @@ -139,25 +191,27 @@ protected: \ protected: \ Node* GetNextNode() \ { \ - size_type bucket = GetBucketForNode(m_ht,m_node); \ + 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 m_ht->m_table[i]; \ + return static_cast(m_ht->m_table[i]); \ } \ - return 0; \ + return NULL; \ } \ \ void PlusPlus() \ { \ - Node* next = m_node->m_next(); \ - m_node = next ? next : GetNextNode(); \ + Node* next = m_node->next(); \ + m_node = next ? next : GetNextNode(); \ } \ }; \ + friend class Iterator; \ \ public: \ - struct iterator:public Iterator \ + CLASSEXP iterator : public Iterator \ { \ + public: \ iterator() : Iterator() {} \ iterator( Node* node, Self* ht ) : Iterator( node, ht ) {} \ iterator& operator++() { PlusPlus(); return *this; } \ @@ -166,31 +220,33 @@ public: \ pointer operator ->() const { return &(m_node->m_value); } \ }; \ \ - struct const_iterator:public Iterator \ + CLASSEXP const_iterator : public Iterator \ { \ + public: \ const_iterator() : Iterator() {} \ + const_iterator(iterator i) : Iterator(i) {} \ const_iterator( Node* node, const Self* ht ) \ - : Iterator( node, (Self*)ht ) {} \ + : Iterator(node, const_cast(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 size = 10, const hasher& hfun = hasher(), \ + 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( size ) ), \ + : m_tableBuckets( GetNextPrime( (unsigned long) sz ) ), \ m_items( 0 ), \ m_hasher( hfun ), \ m_equals( k_eq ), \ m_getKey( k_ex ) \ { \ - m_table = (Node**)AllocTable( m_tableBuckets ); \ + m_table = (_wxHashTable_NodeBase**)AllocTable(m_tableBuckets); \ } \ \ CLASSNAME( const Self& ht ) \ - : m_table( 0 ), \ + : m_table(NULL), \ m_tableBuckets( 0 ), \ m_items( ht.m_items ), \ m_hasher( ht.m_hasher ), \ @@ -202,20 +258,23 @@ public: \ \ const Self& operator=( const Self& ht ) \ { \ - 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; \ + 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(); \ \ - delete[] m_table; \ + FreeTable(m_table); \ } \ \ hasher hash_funct() { return m_hasher; } \ @@ -223,32 +282,36 @@ public: \ \ /* removes all elements from the hash table, but does not */ \ /* shrink it ( perhaps it should ) */ \ - void clear() { DeleteNodes( m_tableBuckets, (_wxHashTable_NodeBase**)m_table, DeleteNode ); } \ + 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( 0, this ); } \ - iterator end() { return iterator( 0, this ); } \ + const_iterator end() const { return const_iterator(NULL, this); } \ + iterator end() { return iterator(NULL, this); } \ const_iterator begin() const \ - { return const_iterator( (Node*)GetFirstNode( m_tableBuckets, (_wxHashTable_NodeBase**)m_table ), this ); }; \ + { return const_iterator(static_cast(GetFirstNode(m_tableBuckets, m_table)), this); } \ iterator begin() \ - { return iterator( (Node*)GetFirstNode( m_tableBuckets, (_wxHashTable_NodeBase**)m_table ), this ); }; \ + { return iterator(static_cast(GetFirstNode(m_tableBuckets, m_table)), this); } \ \ size_type erase( const const_key_type& key ) \ { \ - Node** node = GetNodePtr( key ); \ + _wxHashTable_NodeBase** node = GetNodePtr(key); \ \ if( !node ) \ return 0; \ \ --m_items; \ - Node* temp = (*node)->m_next(); \ - delete *node; \ + _wxHashTable_NodeBase* temp = (*node)->m_next; \ + delete static_cast(*node); \ (*node) = temp; \ if( SHOULD_SHRINK( m_tableBuckets, m_items ) ) \ - ResizeTable( GetPreviousPrime( m_tableBuckets ) - 1 ); \ + ResizeTable( GetPreviousPrime( (unsigned long) m_tableBuckets ) - 1 ); \ return 1; \ } \ \ @@ -260,21 +323,28 @@ protected: \ } \ static Node* CopyNode( Node* node ) { return new Node( *node ); } \ \ - Node* GetOrCreateNode( const value_type& value ) \ + 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 = m_table[bucket]; \ + Node* node = static_cast(m_table[bucket]); \ \ while( node ) \ { \ if( m_equals( m_getKey( node->m_value ), key ) ) \ + { \ + created = false; \ return node; \ - node = node->m_next(); \ + } \ + node = node->next(); \ } \ - \ - node = new Node( value ); \ - node->m_nxt = m_table[bucket]; \ + 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 */ \ @@ -284,160 +354,270 @@ protected: \ \ return node; \ } \ + void CreateNode( const value_type& value ) \ + {\ + CreateNode(value, m_hasher( m_getKey(value) ) % m_tableBuckets ); \ + }\ \ /* returns NULL if not found */ \ - Node** GetNodePtr( const const_key_type& key ) const \ + _wxHashTable_NodeBase** GetNodePtr(const const_key_type& key) const \ { \ - unsigned long hash = m_hasher( key ); \ - Node** node = &m_table[hash % m_tableBuckets]; \ + size_t bucket = m_hasher( key ) % m_tableBuckets; \ + _wxHashTable_NodeBase** node = &m_table[bucket]; \ \ while( *node ) \ { \ - if( m_equals( m_getKey( (*node)->m_value ), key ) ) \ + if (m_equals(m_getKey(static_cast(*node)->m_value), key)) \ return node; \ - node = (Node**)&(*node)->m_nxt; \ + node = &(*node)->m_next; \ } \ \ - return 0; \ + 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 \ { \ - unsigned long hash = m_hasher( key ); \ - Node* node = m_table[hash % m_tableBuckets]; \ + size_t bucket = m_hasher( key ) % m_tableBuckets; \ + Node* node = static_cast(m_table[bucket]); \ \ while( node ) \ { \ if( m_equals( m_getKey( node->m_value ), key ) ) \ return node; \ - node = node->m_next(); \ + node = node->next(); \ } \ \ - return 0; \ + return NULL; \ } \ \ void ResizeTable( size_t newSize ) \ { \ - newSize = GetNextPrime( newSize ); \ - Node** srcTable = m_table; \ + newSize = GetNextPrime( (unsigned long)newSize ); \ + _wxHashTable_NodeBase** srcTable = m_table; \ size_t srcBuckets = m_tableBuckets; \ - m_table = (Node**)AllocTable( newSize ); \ + m_table = (_wxHashTable_NodeBase**)AllocTable( newSize ); \ m_tableBuckets = newSize; \ \ - CopyHashTable( (_wxHashTable_NodeBase**)srcTable, srcBuckets, \ - this, (_wxHashTable_NodeBase**)m_table, \ - (BucketFromNode)&GetBucketForNode,\ + CopyHashTable( srcTable, srcBuckets, \ + this, m_table, \ + (BucketFromNode)GetBucketForNode,\ (ProcessNode)&DummyProcessNode ); \ - delete[] srcTable; \ + FreeTable(srcTable); \ } \ \ /* this must be called _after_ m_table has been cleaned */ \ void HashCopy( const Self& ht ) \ { \ ResizeTable( ht.size() ); \ - CopyHashTable( (_wxHashTable_NodeBase**)ht.m_table, ht.m_tableBuckets,\ + CopyHashTable( ht.m_table, ht.m_tableBuckets, \ (_wxHashTableBase2*)this, \ - (_wxHashTable_NodeBase**)m_table, \ - (BucketFromNode)&GetBucketForNode, \ - (ProcessNode)&CopyNode ); \ + 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 first_type; \ + typedef VALUE_T second_type; \ 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(t1(f)),second(t2(s)) {} \ - CLASSNAME( const const_t1& f ):first(t1(f)),second(t2()) {} \ + CLASSNAME(const const_t1& f, const const_t2& s) \ + : first(const_cast(f)), second(const_cast(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() {}; \ - KEY_T operator()( PAIR_T pair ) const { return pair.first; } \ + 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 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 longHash; + WX_HASH_MAP_NAMESPACE::hash ulongHash; + WX_HASH_MAP_NAMESPACE::hash intHash; + WX_HASH_MAP_NAMESPACE::hash uintHash; + WX_HASH_MAP_NAMESPACE::hash shortHash; + WX_HASH_MAP_NAMESPACE::hash ushortHash; + +#if defined wxLongLong_t && !defined wxLongLongIsLong + // hash 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 longlongHash; + #else + WX_HASH_MAP_NAMESPACE::hash 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 wxIntegerHash +class WXDLLIMPEXP_BASE wxIntegerHash { public: - wxIntegerHash() {}; + 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 static_cast(x); } + wxULongLong_t operator()( wxULongLong_t x ) const { return x; } +#endif + + wxIntegerHash& operator=(const wxIntegerHash&) { return *this; } }; -class wxIntegerEqual +#endif // !wxNEEDS_WX_HASH_MAP/wxNEEDS_WX_HASH_MAP + +class WXDLLIMPEXP_BASE wxIntegerEqual { public: - wxIntegerEqual() {}; + 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()( 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()( 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 wxPointerHash +class WXDLLIMPEXP_BASE wxPointerHash { public: - wxPointerHash() {}; - unsigned long operator()( const void* k ) const - { return (unsigned long)k; } + 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 wxPointerEqual +class WXDLLIMPEXP_BASE wxPointerEqual { public: - wxPointerEqual() {}; - bool operator()( const void* a, const void* b ) const - { return a == b; } + wxPointerEqual() { } + bool operator()( const void* a, const void* b ) const { return a == b; } + + wxPointerEqual& operator=(const wxPointerEqual&) { return *this; } }; -// wxString, char*, wxChar* -class wxStringHash +// wxString, char*, wchar_t* +class WXDLLIMPEXP_BASE wxStringHash { public: - wxStringHash() {}; + wxStringHash() {} unsigned long operator()( const wxString& x ) const - { return wxCharStringHash( x.c_str() ); } - unsigned long operator()( const wxChar* x ) const - { return wxCharStringHash( x ); } - static unsigned long wxCharStringHash( const wxChar* ); -#if wxUSE_UNICODE + { return stringHash( x.wx_str() ); } + unsigned long operator()( const wchar_t* x ) const + { return stringHash( x ); } unsigned long operator()( const char* x ) const - { return charStringHash( x ); } - static unsigned long charStringHash( const char* ); -#endif + { 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 wxStringEqual +class WXDLLIMPEXP_BASE wxStringEqual { public: - wxStringEqual() {}; + wxStringEqual() {} bool operator()( const wxString& a, const wxString& b ) const { return a == b; } bool operator()( const wxChar* a, const wxChar* b ) const @@ -445,9 +625,13 @@ public: #if wxUSE_UNICODE bool operator()( const char* a, const char* b ) const { return strcmp( a, b ) == 0; } -#endif +#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 ) \ @@ -456,13 +640,19 @@ CLASSEXP CLASSNAME:public CLASSNAME##_wxImplementation_HashTable \ { \ public: \ typedef VALUE_T mapped_type; \ + _WX_DECLARE_PAIR( iterator, bool, Insert_Result, CLASSEXP ) \ \ - CLASSNAME( size_type hint = 100, hasher hf = hasher(), key_equal eq = key_equal() ) \ - : CLASSNAME##_wxImplementation_HashTable( hint, hf, eq, CLASSNAME##_wxImplementation_KeyEx() ) {} \ + 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 ) \ { \ - return GetOrCreateNode( CLASSNAME##_wxImplementation_Pair( key ) )->m_value.second; \ + bool created; \ + return GetOrCreateNode( \ + CLASSNAME##_wxImplementation_Pair( key, mapped_type() ), \ + created)->m_value.second; \ } \ \ const_iterator find( const const_key_type& key ) const \ @@ -475,17 +665,28 @@ public: \ return iterator( GetNode( key ), this ); \ } \ \ - void insert( const value_type& v ) { (*this)[v.first] = v.second; } \ + Insert_Result insert( const value_type& v ) \ + { \ + bool created; \ + Node *node = GetOrCreateNode( \ + CLASSNAME##_wxImplementation_Pair( v.first, v.second ), \ + created); \ + 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 ) \ - { return GetNode( key ) ? 1 : 0; } \ -}; + { \ + /* 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) \ @@ -493,27 +694,62 @@ public: \ #define WX_DECLARE_STRING_HASH_MAP( VALUE_T, CLASSNAME ) \ _WX_DECLARE_HASH_MAP( wxString, VALUE_T, wxStringHash, wxStringEqual, \ - CLASSNAME, class ); + CLASSNAME, class ) #define WX_DECLARE_VOIDPTR_HASH_MAP( VALUE_T, CLASSNAME ) \ _WX_DECLARE_HASH_MAP( void*, VALUE_T, wxPointerHash, wxPointerEqual, \ - CLASSNAME, class ); + 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( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, CLASSNAME, class WXDLLEXPORT ) + WX_DECLARE_HASH_MAP_WITH_DECL( KEY_T, VALUE_T, HASH_T, KEY_EQ_T, \ + CLASSNAME, class WXDLLIMPEXP_CORE ) -#define WX_DECLARE_EXPORTED_STRING_HASH_MAP( VALUE_T, CLASSNAME ) \ +#define WX_DECLARE_STRING_HASH_MAP_WITH_DECL( VALUE_T, CLASSNAME, DECL ) \ _WX_DECLARE_HASH_MAP( wxString, VALUE_T, wxStringHash, wxStringEqual, \ - CLASSNAME, class WXDLLEXPORT ); + CLASSNAME, DECL ) -#define WX_DECLARE_EXPORTED_VOIDPTR_HASH_MAP( VALUE_T, CLASSNAME ) \ +#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, class WXDLLEXPORT ); + 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 ); + +WX_DECLARE_STRING_HASH_MAP_WITH_DECL( wxString, wxStringToStringHashMap, + class WXDLLIMPEXP_BASE ); + +WX_DECLARE_STRING_HASH_MAP_WITH_DECL( wxUIntPtr, wxStringToNumHashMap, + class WXDLLIMPEXP_BASE ); -#endif -// Local variables: -// mode: c++ -// End: +#endif // _WX_HASHMAP_H_