X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8a646b6b9f7593b433a328ce644f5f274685b356..4e2251ecd324ba89c486434485efcb1d32ee7dca:/include/wx/hashmap.h?ds=sidebyside diff --git a/include/wx/hashmap.h b/include/wx/hashmap.h index 316abdec50..41aaccb230 100644 --- a/include/wx/hashmap.h +++ b/include/wx/hashmap.h @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: hashmap.h +// Name: wx/hashmap.h // Purpose: wxHashMap class // Author: Mattia Barbon // Modified by: @@ -12,24 +12,53 @@ #ifndef _WX_HASHMAP_H_ #define _WX_HASHMAP_H_ -#if defined(__GNUG__) && !defined(__APPLE__) -#pragma interface "hashmap.h" +#include "wx/string.h" + +#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 // for ptrdiff_t +#if wxUSE_STL && defined(HAVE_STL_HASH_MAP) -#include "wx/string.h" +#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 || !defined(HAVE_STL_HASH_MAP) + + +#ifdef __WXWINCE__ +typedef int ptrdiff_t; +#else +#include // for ptrdiff_t +#endif // private -struct WXDLLEXPORT _wxHashTable_NodeBase +struct WXDLLIMPEXP_BASE _wxHashTable_NodeBase { _wxHashTable_NodeBase() : m_nxt(0) {} _wxHashTable_NodeBase* m_nxt; + +// Cannot do this: +// DECLARE_NO_COPY_CLASS(_wxHashTable_NodeBase) +// without rewriting the macros, which require a public copy constructor. }; // private -class WXDLLEXPORT _wxHashTableBase2 +class WXDLLIMPEXP_BASE _wxHashTableBase2 { public: typedef void (*NodeDtor)(_wxHashTable_NodeBase*); @@ -64,9 +93,13 @@ protected: _wxHashTable_NodeBase** dstTable, BucketFromNode func, ProcessNode proc ); - static void** AllocTable( size_t size ) + static void** AllocTable( size_t sz ) { - return (void **)calloc(size, sizeof(void*)); + return (void **)calloc(sz, sizeof(void*)); + } + static void FreeTable(void *table) + { + free(table); } }; @@ -110,8 +143,8 @@ public: \ value_type m_value; \ }; \ \ - struct Iterator; \ - friend struct Iterator; \ + CLASSEXP Iterator; \ + friend CLASSEXP Iterator; \ protected: \ static void DeleteNode( _wxHashTable_NodeBase* node ) \ { \ @@ -121,8 +154,9 @@ public: \ /* */ \ /* forward iterator */ \ /* */ \ - struct Iterator \ + CLASSEXP Iterator \ { \ + public: \ Node* m_node; \ Self* m_ht; \ \ @@ -153,8 +187,9 @@ public: \ }; \ \ 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; } \ @@ -163,9 +198,11 @@ 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 ) {} \ const_iterator& operator++() { PlusPlus();return *this; } \ @@ -174,10 +211,10 @@ public: \ 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 ), \ @@ -212,7 +249,7 @@ public: \ { \ clear(); \ \ - free(m_table); \ + FreeTable(m_table); \ } \ \ hasher hash_funct() { return m_hasher; } \ @@ -220,7 +257,12 @@ 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, (_wxHashTable_NodeBase**)m_table, \ + DeleteNode ); \ + m_items = 0; \ + } \ \ size_type size() const { return m_items; } \ size_type max_size() const { return size_type(-1); } \ @@ -245,7 +287,7 @@ public: \ delete *node; \ (*node) = temp; \ if( SHOULD_SHRINK( m_tableBuckets, m_items ) ) \ - ResizeTable( GetPreviousPrime( m_tableBuckets ) - 1 ); \ + ResizeTable( GetPreviousPrime( (unsigned long) m_tableBuckets ) - 1 ); \ return 1; \ } \ \ @@ -257,7 +299,7 @@ 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; \ @@ -266,11 +308,18 @@ protected: \ while( node ) \ { \ if( m_equals( m_getKey( node->m_value ), key ) ) \ + { \ + created = false; \ return node; \ + } \ node = node->m_next(); \ } \ - \ - node = new Node( value ); \ + created = true; \ + return CreateNode( value, bucket); \ + }\ + Node * CreateNode( const value_type& value, size_t bucket ) \ + {\ + Node* node = new Node( value ); \ node->m_nxt = m_table[bucket]; \ m_table[bucket] = node; \ \ @@ -281,29 +330,34 @@ 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 \ { \ - unsigned long hash = m_hasher( key ); \ - Node** node = &m_table[hash % m_tableBuckets]; \ + size_t bucket = m_hasher( key ) % m_tableBuckets; \ + Node** node = &m_table[bucket]; \ \ while( *node ) \ { \ if( m_equals( m_getKey( (*node)->m_value ), key ) ) \ return node; \ + /* Tell the compiler to not do any strict-aliasing assumptions with a void cast? Can we make such a runtime guarantee? */ \ node = (Node**)&(*node)->m_nxt; \ } \ \ - 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 = m_table[bucket]; \ \ while( node ) \ { \ @@ -317,7 +371,7 @@ protected: \ \ void ResizeTable( size_t newSize ) \ { \ - newSize = GetNextPrime( newSize ); \ + newSize = GetNextPrime( (unsigned long)newSize ); \ Node** srcTable = m_table; \ size_t srcBuckets = m_tableBuckets; \ m_table = (Node**)AllocTable( newSize ); \ @@ -325,9 +379,9 @@ protected: \ \ CopyHashTable( (_wxHashTable_NodeBase**)srcTable, srcBuckets, \ this, (_wxHashTable_NodeBase**)m_table, \ - (BucketFromNode)&GetBucketForNode,\ + (BucketFromNode)GetBucketForNode,\ (ProcessNode)&DummyProcessNode ); \ - free(srcTable); \ + FreeTable(srcTable); \ } \ \ /* this must be called _after_ m_table has been cleaned */ \ @@ -337,8 +391,8 @@ protected: \ CopyHashTable( (_wxHashTable_NodeBase**)ht.m_table, ht.m_tableBuckets,\ (_wxHashTableBase2*)this, \ (_wxHashTable_NodeBase**)m_table, \ - (BucketFromNode)&GetBucketForNode, \ - (ProcessNode)&CopyNode ); \ + (BucketFromNode)GetBucketForNode, \ + (ProcessNode)CopyNode ); \ } \ }; @@ -354,7 +408,6 @@ public: \ 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()) {} \ \ t1 first; \ t2 second; \ @@ -382,13 +435,15 @@ public: \ }; // 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 // !wxUSE_STL || !defined(HAVE_STL_HASH_MAP) + // ---------------------------------------------------------------------------- // hashing and comparison functors // ---------------------------------------------------------------------------- @@ -397,8 +452,54 @@ inline bool grow_lf70( size_t buckets, size_t items ) // operators to suppress warnings about "statement with no effect" from gcc // in the hash table class assignment operator (where they're assigned) +#if wxUSE_STL && defined(HAVE_STL_HASH_MAP) + // integer types -class WXDLLEXPORT wxIntegerHash +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 // !wxUSE_STL || !defined(HAVE_STL_HASH_MAP) + +// integer types +class WXDLLIMPEXP_BASE wxIntegerHash { public: wxIntegerHash() { } @@ -408,11 +509,17 @@ public: 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; } }; -class WXDLLEXPORT wxIntegerEqual +#endif // !wxUSE_STL || !defined(HAVE_STL_HASH_MAP) + +class WXDLLIMPEXP_BASE wxIntegerEqual { public: wxIntegerEqual() { } @@ -422,24 +529,30 @@ public: 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 WXDLLEXPORT wxPointerHash +class WXDLLIMPEXP_BASE wxPointerHash { public: wxPointerHash() { } - // TODO: this might not work well on architectures with 64 bit pointers but - // 32 bit longs, we should use % ULONG_MAX there - unsigned long operator()( const void* k ) const { return (unsigned long)k; } +#if wxUSE_STL && defined(HAVE_STL_HASH_MAP) + size_t operator()( const void* k ) const { return (size_t)k; } +#else + wxUIntPtr operator()( const void* k ) const { return wxPtrToUInt(k); } +#endif wxPointerHash& operator=(const wxPointerHash&) { return *this; } }; -class WXDLLEXPORT wxPointerEqual +class WXDLLIMPEXP_BASE wxPointerEqual { public: wxPointerEqual() { } @@ -449,7 +562,7 @@ public: }; // wxString, char*, wxChar* -class WXDLLEXPORT wxStringHash +class WXDLLIMPEXP_BASE wxStringHash { public: wxStringHash() {} @@ -467,7 +580,7 @@ public: wxStringHash& operator=(const wxStringHash&) { return *this; } }; -class WXDLLEXPORT wxStringEqual +class WXDLLIMPEXP_BASE wxStringEqual { public: wxStringEqual() {} @@ -483,6 +596,8 @@ public: wxStringEqual& operator=(const wxStringEqual&) { return *this; } }; +#if !wxUSE_STL || !defined(HAVE_STL_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 ) \ @@ -491,13 +606,19 @@ 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 \ @@ -510,7 +631,16 @@ 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); \ + 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 ); } \ @@ -519,8 +649,13 @@ public: \ \ /* 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 // !wxUSE_STL || !defined(HAVE_STL_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) \ @@ -528,24 +663,56 @@ 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 WXDLLEXPORT ) -#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 WXDLLEXPORT ) + +#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 ) -#endif // _WX_HASHMAP_H_ +#define WX_DECLARE_EXPORTED_VOIDPTR_HASH_MAP( VALUE_T, CLASSNAME ) \ + WX_DECLARE_VOIDPTR_HASH_MAP_WITH_DECL( VALUE_T, CLASSNAME, \ + class WXDLLEXPORT ) + +// 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_