X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c2bb85e9e38ee35758e0076485bb6665f2c229f5..974dee61a9a0f72652488fc4120a82846990345b:/src/common/hash.cpp?ds=inline diff --git a/src/common/hash.cpp b/src/common/hash.cpp index 1aa13adf84..9a538b0fd9 100644 --- a/src/common/hash.cpp +++ b/src/common/hash.cpp @@ -1,11 +1,11 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: hash.cpp +// Name: src/common/hash.cpp // Purpose: wxHashTable implementation // Author: Julian Smart // Modified by: VZ at 25.02.00: type safe hashes with WX_DECLARE_HASH() // Created: 01/02/97 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart and Markus Holzem +// Copyright: (c) Julian Smart // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// @@ -17,22 +17,19 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ -#pragma implementation "hash.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif #ifndef WX_PRECOMP -#include "wx/list.h" + #include "wx/list.h" + #include "wx/hash.h" #endif -#include "wx/hash.h" +#if wxUSE_OLD_HASH_TABLE #include #include @@ -53,7 +50,7 @@ IMPLEMENT_DYNAMIC_CLASS(wxHashTable, wxObject) wxHashTableBase::wxHashTableBase() { - m_deleteContents = FALSE; + m_deleteContents = false; m_hashTable = (wxListBase **)NULL; m_hashSize = 0; m_count = 0; @@ -104,7 +101,7 @@ void wxHashTableBase::DeleteContents(bool flag) wxNodeBase *wxHashTableBase::GetNode(long key, long value) const { - size_t slot = (size_t)abs(key % m_hashSize); + size_t slot = (size_t)abs((int)(key % (long)m_hashSize)); wxNodeBase *node; if ( m_hashTable[slot] ) @@ -119,10 +116,17 @@ wxNodeBase *wxHashTableBase::GetNode(long key, long value) const return node; } +#if WXWIN_COMPATIBILITY_2_4 + // ---------------------------------------------------------------------------- // wxHashTableLong // ---------------------------------------------------------------------------- +wxHashTableLong::~wxHashTableLong() +{ + Destroy(); +} + void wxHashTableLong::Init(size_t size) { m_hashSize = size; @@ -138,6 +142,11 @@ void wxHashTableLong::Init(size_t size) m_count = 0; } +void wxHashTableLong::Create(size_t size) +{ + Init(size); +} + void wxHashTableLong::Destroy() { for ( size_t n = 0; n < m_hashSize; n++ ) @@ -156,7 +165,7 @@ void wxHashTableLong::Put(long key, long value) { wxCHECK_RET( m_hashSize, _T("must call Create() first") ); - size_t slot = (size_t)abs(key % m_hashSize); + size_t slot = (size_t)abs((int)(key % (long)m_hashSize)); if ( !m_keys[slot] ) { @@ -174,7 +183,7 @@ long wxHashTableLong::Get(long key) const { wxCHECK_MSG( m_hashSize, wxNOT_FOUND, _T("must call Create() first") ); - size_t slot = (size_t)abs(key % m_hashSize); + size_t slot = (size_t)abs((int)(key % (long)m_hashSize)); wxArrayLong *keys = m_keys[slot]; if ( keys ) @@ -196,7 +205,7 @@ long wxHashTableLong::Delete(long key) { wxCHECK_MSG( m_hashSize, wxNOT_FOUND, _T("must call Create() first") ); - size_t slot = (size_t)abs(key % m_hashSize); + size_t slot = (size_t)abs((int)(key % (long)m_hashSize)); wxArrayLong *keys = m_keys[slot]; if ( keys ) @@ -221,6 +230,111 @@ long wxHashTableLong::Delete(long key) return wxNOT_FOUND; } +// ---------------------------------------------------------------------------- +// wxStringHashTable: more efficient than storing strings in a list +// ---------------------------------------------------------------------------- + +wxStringHashTable::wxStringHashTable(size_t sizeTable) +{ + m_keys = new wxArrayLong *[sizeTable]; + m_values = new wxArrayString *[sizeTable]; + + m_hashSize = sizeTable; + for ( size_t n = 0; n < m_hashSize; n++ ) + { + m_values[n] = (wxArrayString *)NULL; + m_keys[n] = (wxArrayLong *)NULL; + } +} + +wxStringHashTable::~wxStringHashTable() +{ + Destroy(); +} + +void wxStringHashTable::Destroy() +{ + for ( size_t n = 0; n < m_hashSize; n++ ) + { + delete m_values[n]; + delete m_keys[n]; + } + + delete [] m_values; + delete [] m_keys; + m_hashSize = 0; +} + +void wxStringHashTable::Put(long key, const wxString& value) +{ + wxCHECK_RET( m_hashSize, _T("must call Create() first") ); + + size_t slot = (size_t)abs((int)(key % (long)m_hashSize)); + + if ( !m_keys[slot] ) + { + m_keys[slot] = new wxArrayLong; + m_values[slot] = new wxArrayString; + } + + m_keys[slot]->Add(key); + m_values[slot]->Add(value); +} + +wxString wxStringHashTable::Get(long key, bool *wasFound) const +{ + wxCHECK_MSG( m_hashSize, wxEmptyString, _T("must call Create() first") ); + + size_t slot = (size_t)abs((int)(key % (long)m_hashSize)); + + wxArrayLong *keys = m_keys[slot]; + if ( keys ) + { + size_t count = keys->GetCount(); + for ( size_t n = 0; n < count; n++ ) + { + if ( keys->Item(n) == key ) + { + if ( wasFound ) + *wasFound = true; + + return m_values[slot]->Item(n); + } + } + } + + if ( wasFound ) + *wasFound = false; + + return wxEmptyString; +} + +bool wxStringHashTable::Delete(long key) const +{ + wxCHECK_MSG( m_hashSize, false, _T("must call Create() first") ); + + size_t slot = (size_t)abs((int)(key % (long)m_hashSize)); + + wxArrayLong *keys = m_keys[slot]; + if ( keys ) + { + size_t count = keys->GetCount(); + for ( size_t n = 0; n < count; n++ ) + { + if ( keys->Item(n) == key ) + { + keys->RemoveAt(n); + m_values[slot]->RemoveAt(n); + return true; + } + } + } + + return false; +} + +#endif // WXWIN_COMPATIBILITY_2_4 + // ---------------------------------------------------------------------------- // old not type safe wxHashTable // ---------------------------------------------------------------------------- @@ -231,7 +345,7 @@ wxHashTable::wxHashTable (int the_key_type, int size) hash_table = (wxList**) NULL; Create(the_key_type, size); m_count = 0; - m_deleteContents = FALSE; + m_deleteContents = false; /* n = size; current_position = -1; @@ -274,13 +388,14 @@ bool wxHashTable::Create(int the_key_type, int size) int i; for (i = 0; i < size; i++) hash_table[i] = (wxList *) NULL; - return TRUE; + return true; } void wxHashTable::DoCopy(const wxHashTable& table) { n = table.n; + m_count = table.m_count; current_position = table.current_position; current_node = NULL; // doesn't matter - Next() will reconstruct it key_type = table.key_type; @@ -307,7 +422,7 @@ void wxHashTable::Put (long key, long value, wxObject * object) if (!hash_table[position]) { hash_table[position] = new wxList (wxKEY_INTEGER); - if (m_deleteContents) hash_table[position]->DeleteContents(TRUE); + if (m_deleteContents) hash_table[position]->DeleteContents(true); } hash_table[position]->Append (value, object); @@ -324,8 +439,8 @@ void wxHashTable::Put (long key, const wxChar *value, wxObject * object) if (!hash_table[position]) { - hash_table[position] = new wxList (wxKEY_INTEGER); - if (m_deleteContents) hash_table[position]->DeleteContents(TRUE); + hash_table[position] = new wxList (wxKEY_STRING); + if (m_deleteContents) hash_table[position]->DeleteContents(true); } hash_table[position]->Append (value, object); @@ -343,7 +458,7 @@ void wxHashTable::Put (long key, wxObject * object) if (!hash_table[position]) { hash_table[position] = new wxList (wxKEY_INTEGER); - if (m_deleteContents) hash_table[position]->DeleteContents(TRUE); + if (m_deleteContents) hash_table[position]->DeleteContents(true); } hash_table[position]->Append (k, object); @@ -358,7 +473,7 @@ void wxHashTable::Put (const wxChar *key, wxObject * object) if (!hash_table[position]) { hash_table[position] = new wxList (wxKEY_STRING); - if (m_deleteContents) hash_table[position]->DeleteContents(TRUE); + if (m_deleteContents) hash_table[position]->DeleteContents(true); } hash_table[position]->Append (key, object); @@ -379,7 +494,7 @@ wxObject *wxHashTable::Get (long key, long value) const { wxNode *node = hash_table[position]->Find (value); if (node) - return node->Data (); + return node->GetData (); else return (wxObject *) NULL; } @@ -399,7 +514,7 @@ wxObject *wxHashTable::Get (long key, const wxChar *value) const { wxNode *node = hash_table[position]->Find (value); if (node) - return node->Data (); + return node->GetData (); else return (wxObject *) NULL; } @@ -418,7 +533,7 @@ wxObject *wxHashTable::Get (long key) const else { wxNode *node = hash_table[position]->Find (k); - return node ? node->Data () : (wxObject*)NULL; + return node ? node->GetData () : (wxObject*)NULL; } } @@ -432,7 +547,7 @@ wxObject *wxHashTable::Get (const wxChar *key) const else { wxNode *node = hash_table[position]->Find (key); - return node ? node->Data () : (wxObject*)NULL; + return node ? node->GetData () : (wxObject*)NULL; } } @@ -451,7 +566,7 @@ wxObject *wxHashTable::Delete (long key) wxNode *node = hash_table[position]->Find (k); if (node) { - wxObject *data = node->Data (); + wxObject *data = node->GetData (); delete node; m_count--; return data; @@ -473,7 +588,7 @@ wxObject *wxHashTable::Delete (const wxChar *key) wxNode *node = hash_table[position]->Find (key); if (node) { - wxObject *data = node->Data (); + wxObject *data = node->GetData (); delete node; m_count--; return data; @@ -498,7 +613,7 @@ wxObject *wxHashTable::Delete (long key, int value) wxNode *node = hash_table[position]->Find (value); if (node) { - wxObject *data = node->Data (); + wxObject *data = node->GetData (); delete node; m_count--; return data; @@ -520,7 +635,7 @@ wxObject *wxHashTable::Delete (long key, const wxChar *value) wxNode *node = hash_table[position]->Find (value); if (node) { - wxObject *data = node->Data (); + wxObject *data = node->GetData (); delete node; m_count--; return data; @@ -546,10 +661,10 @@ void wxHashTable::BeginFind () current_node = (wxNode *) NULL; } -wxNode *wxHashTable::Next () +wxHashTable::Node* wxHashTable::Next () { wxNode *found = (wxNode *) NULL; - bool end = FALSE; + bool end = false; while (!end && !found) { if (!current_node) @@ -559,20 +674,20 @@ wxNode *wxHashTable::Next () { current_position = -1; current_node = (wxNode *) NULL; - end = TRUE; + end = true; } else { if (hash_table[current_position]) { - current_node = hash_table[current_position]->First (); + current_node = hash_table[current_position]->GetFirst (); found = current_node; } } } else { - current_node = current_node->Next (); + current_node = current_node->GetNext (); found = current_node; } } @@ -592,12 +707,371 @@ void wxHashTable::DeleteContents (bool flag) void wxHashTable::Clear () { - int i; - for (i = 0; i < n; i++) + int i; + if (hash_table) { - if (hash_table[i]) - hash_table[i]->Clear (); + for (i = 0; i < n; i++) + { + if (hash_table[i]) + hash_table[i]->Clear (); + } } m_count = 0; } +#else // if !wxUSE_OLD_HASH_TABLE + +wxHashTableBase_Node::wxHashTableBase_Node( long key, void* value, + wxHashTableBase* table ) + : m_value( value ), m_hashPtr( table ) +{ + m_key.integer = key; +} + +wxHashTableBase_Node::wxHashTableBase_Node( const wxChar* key, void* value, + wxHashTableBase* table ) + : m_value( value ), m_hashPtr( table ) +{ + m_key.string = wxStrcpy( new wxChar[wxStrlen( key ) + 1], key ); +} + +wxHashTableBase_Node::~wxHashTableBase_Node() +{ + if( m_hashPtr ) m_hashPtr->DoRemoveNode( this ); +} + +// + +wxHashTableBase::wxHashTableBase() + : m_size( 0 ), m_count( 0 ), m_table( NULL ), m_keyType( wxKEY_NONE ), + m_deleteContents( false ) +{ +} + +void wxHashTableBase::Create( wxKeyType keyType, size_t size ) +{ + m_keyType = keyType; + m_size = size; + m_table = new wxHashTableBase_Node*[ m_size ]; + + for( size_t i = 0; i < m_size; ++i ) + m_table[i] = NULL; +} + +void wxHashTableBase::Clear() +{ + for( size_t i = 0; i < m_size; ++i ) + { + Node* end = m_table[i]; + + if( end == NULL ) + continue; + + Node *curr, *next = end->GetNext(); + + do + { + curr = next; + next = curr->GetNext(); + + DoDestroyNode( curr ); + + delete curr; + } + while( curr != end ); + + m_table[i] = NULL; + } + + m_count = 0; +} + +void wxHashTableBase::DoRemoveNode( wxHashTableBase_Node* node ) +{ + size_t bucket = ( m_keyType == wxKEY_INTEGER ? + node->m_key.integer : + MakeKey( node->m_key.string ) ) % m_size; + + if( node->GetNext() == node ) + { + // single-node chain (common case) + m_table[bucket] = NULL; + } + else + { + Node *start = m_table[bucket], *curr; + Node* prev = start; + + for( curr = prev->GetNext(); curr != node; + prev = curr, curr = curr->GetNext() ) ; + + DoUnlinkNode( bucket, node, prev ); + } + + DoDestroyNode( node ); +} + +void wxHashTableBase::DoDestroyNode( wxHashTableBase_Node* node ) +{ + // if it is called from DoRemoveNode, node has already been + // removed, from other places it does not matter + node->m_hashPtr = NULL; + + if( m_keyType == wxKEY_STRING ) + delete[] node->m_key.string; + if( m_deleteContents ) + DoDeleteContents( node ); +} + +void wxHashTableBase::Destroy() +{ + Clear(); + + delete[] m_table; + + m_table = NULL; + m_size = 0; +} + +void wxHashTableBase::DoInsertNode( size_t bucket, wxHashTableBase_Node* node ) +{ + if( m_table[bucket] == NULL ) + { + m_table[bucket] = node->m_next = node; + } + else + { + Node *prev = m_table[bucket]; + Node *next = prev->m_next; + + prev->m_next = node; + node->m_next = next; + m_table[bucket] = node; + } + + ++m_count; +} + +void wxHashTableBase::DoPut( long key, long hash, void* data ) +{ + wxASSERT( m_keyType == wxKEY_INTEGER ); + + size_t bucket = size_t(hash) % m_size; + Node* node = new wxHashTableBase_Node( key, data, this ); + + DoInsertNode( bucket, node ); +} + +void wxHashTableBase::DoPut( const wxChar* key, long hash, void* data ) +{ + wxASSERT( m_keyType == wxKEY_STRING ); + + size_t bucket = size_t(hash) % m_size; + Node* node = new wxHashTableBase_Node( key, data, this ); + + DoInsertNode( bucket, node ); +} + +void* wxHashTableBase::DoGet( long key, long hash ) const +{ + wxASSERT( m_keyType == wxKEY_INTEGER ); + + size_t bucket = size_t(hash) % m_size; + + if( m_table[bucket] == NULL ) + return NULL; + + Node *first = m_table[bucket]->GetNext(), + *curr = first; + + do + { + if( curr->m_key.integer == key ) + return curr->m_value; + + curr = curr->GetNext(); + } + while( curr != first ); + + return NULL; +} + +void* wxHashTableBase::DoGet( const wxChar* key, long hash ) const +{ + wxASSERT( m_keyType == wxKEY_STRING ); + + size_t bucket = size_t(hash) % m_size; + + if( m_table[bucket] == NULL ) + return NULL; + + Node *first = m_table[bucket]->GetNext(), + *curr = first; + + do + { + if( wxStrcmp( curr->m_key.string, key ) == 0 ) + return curr->m_value; + + curr = curr->GetNext(); + } + while( curr != first ); + + return NULL; +} + +void wxHashTableBase::DoUnlinkNode( size_t bucket, wxHashTableBase_Node* node, + wxHashTableBase_Node* prev ) +{ + if( node == m_table[bucket] ) + m_table[bucket] = prev; + + if( prev == node && prev == node->GetNext() ) + m_table[bucket] = NULL; + else + prev->m_next = node->m_next; + + DoDestroyNode( node ); + --m_count; +} + +void* wxHashTableBase::DoDelete( long key, long hash ) +{ + wxASSERT( m_keyType == wxKEY_INTEGER ); + + size_t bucket = size_t(hash) % m_size; + + if( m_table[bucket] == NULL ) + return NULL; + + Node *first = m_table[bucket]->GetNext(), + *curr = first, + *prev = m_table[bucket]; + + do + { + if( curr->m_key.integer == key ) + { + void* retval = curr->m_value; + curr->m_value = NULL; + + DoUnlinkNode( bucket, curr, prev ); + delete curr; + + return retval; + } + + prev = curr; + curr = curr->GetNext(); + } + while( curr != first ); + + return NULL; +} + +void* wxHashTableBase::DoDelete( const wxChar* key, long hash ) +{ + wxASSERT( m_keyType == wxKEY_STRING ); + + size_t bucket = size_t(hash) % m_size; + + if( m_table[bucket] == NULL ) + return NULL; + + Node *first = m_table[bucket]->GetNext(), + *curr = first, + *prev = m_table[bucket]; + + do + { + if( wxStrcmp( curr->m_key.string, key ) == 0 ) + { + void* retval = curr->m_value; + curr->m_value = NULL; + + DoUnlinkNode( bucket, curr, prev ); + delete curr; + + return retval; + } + + prev = curr; + curr = curr->GetNext(); + } + while( curr != first ); + + return NULL; +} + +long wxHashTableBase::MakeKey( const wxChar *str ) +{ + long int_key = 0; + + while( *str ) + int_key += (wxUChar)*str++; + + return int_key; +} + +// ---------------------------------------------------------------------------- +// wxHashTable +// ---------------------------------------------------------------------------- + +wxHashTable::wxHashTable( const wxHashTable& table ) + : wxHashTableBase() +{ + DoCopy( table ); +} + +const wxHashTable& wxHashTable::operator=( const wxHashTable& table ) +{ + Destroy(); + DoCopy( table ); + + return *this; +} + +void wxHashTable::DoCopy( const wxHashTable& WXUNUSED(table) ) +{ + Create( m_keyType, m_size ); + + wxFAIL; +} + +void wxHashTable::DoDeleteContents( wxHashTableBase_Node* node ) +{ + delete ((wxHashTable_Node*)node)->GetData(); +} + +void wxHashTable::GetNextNode( size_t bucketStart ) +{ + for( size_t i = bucketStart; i < m_size; ++i ) + { + if( m_table[i] != NULL ) + { + m_curr = ((Node*)m_table[i])->GetNext(); + m_currBucket = i; + return; + } + } + + m_curr = NULL; + m_currBucket = 0; +} + +wxHashTable::Node* wxHashTable::Next() +{ + if( m_curr == NULL ) + GetNextNode( 0 ); + else + { + m_curr = m_curr->GetNext(); + + if( m_curr == ( (Node*)m_table[m_currBucket] )->GetNext() ) + GetNextNode( m_currBucket + 1 ); + } + + return m_curr; +} + +#endif // !wxUSE_OLD_HASH_TABLE