X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c801d85f158c4cba50b588807daabdcbd0ed3853..ce457f1245754243f17b4efde9ec773a8b3c3067:/src/common/hash.cpp?ds=inline diff --git a/src/common/hash.cpp b/src/common/hash.cpp index 1aba64563c..a782166d02 100644 --- a/src/common/hash.cpp +++ b/src/common/hash.cpp @@ -1,350 +1,858 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: hash.cpp +// Name: src/common/hash.cpp // Purpose: wxHashTable implementation // Author: Julian Smart -// Modified by: +// 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 -// Licence: wxWindows licence +// Copyright: (c) Julian Smart +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "hash.h" -#endif +// ============================================================================ +// declarations +// ============================================================================ + +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- // 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 -#if !USE_SHARED_LIBRARY +// ---------------------------------------------------------------------------- +// wxWin macros +// ---------------------------------------------------------------------------- + IMPLEMENT_DYNAMIC_CLASS(wxHashTable, wxObject) -#endif -wxHashTable::wxHashTable (const int the_key_type, const int size) +// ============================================================================ +// implementation +// ============================================================================ + +// ---------------------------------------------------------------------------- +// wxHashTablleBase for working with "void *" data +// ---------------------------------------------------------------------------- + +wxHashTableBase::wxHashTableBase() +{ + m_deleteContents = false; + m_hashTable = (wxListBase **)NULL; + m_hashSize = 0; + m_count = 0; + m_keyType = wxKEY_NONE; +} + +void wxHashTableBase::Create(wxKeyType keyType, size_t size) +{ + Destroy(); + + m_hashSize = size; + m_keyType = keyType; + m_hashTable = new wxListBase *[size]; + for ( size_t n = 0; n < m_hashSize; n++ ) + { + m_hashTable[n] = (wxListBase *) NULL; + } +} + +void wxHashTableBase::Destroy() { + if ( m_hashTable ) + { + for ( size_t n = 0; n < m_hashSize; n++ ) + { + delete m_hashTable[n]; + } + + delete [] m_hashTable; + + m_hashTable = (wxListBase **)NULL; + + m_count = 0; + } +} + +void wxHashTableBase::DeleteContents(bool flag) +{ + m_deleteContents = flag; + for ( size_t n = 0; n < m_hashSize; n++ ) + { + if ( m_hashTable[n] ) + { + m_hashTable[n]->DeleteContents(flag); + } + } +} + +wxNodeBase *wxHashTableBase::GetNode(long key, long value) const +{ + size_t slot = (size_t)abs((int)(key % (long)m_hashSize)); + + wxNodeBase *node; + if ( m_hashTable[slot] ) + { + node = m_hashTable[slot]->Find(wxListKey(value)); + } + else + { + node = (wxNodeBase *)NULL; + } + + return node; +} + +// ---------------------------------------------------------------------------- +// old not type safe wxHashTable +// ---------------------------------------------------------------------------- + +wxHashTable::wxHashTable (int the_key_type, int size) +{ + n = 0; + hash_table = (wxList**) NULL; + Create(the_key_type, size); + m_count = 0; + m_deleteContents = false; +/* n = size; current_position = -1; - current_node = NULL; + current_node = (wxNode *) NULL; key_type = the_key_type; hash_table = new wxList *[size]; int i; for (i = 0; i < size; i++) - hash_table[i] = NULL; + hash_table[i] = (wxList *) NULL; +*/ } -wxHashTable::~wxHashTable (void) +wxHashTable::~wxHashTable () { + Destroy(); +} + +void wxHashTable::Destroy() +{ + if (!hash_table) return; int i; for (i = 0; i < n; i++) if (hash_table[i]) delete hash_table[i]; delete[] hash_table; + hash_table = NULL; } -bool wxHashTable::Create(const int the_key_type, const int size) +bool wxHashTable::Create(int the_key_type, int size) { + Destroy(); + n = size; current_position = -1; - current_node = NULL; + current_node = (wxNode *) NULL; key_type = the_key_type; - if (hash_table) - delete[] hash_table; hash_table = new wxList *[size]; int i; for (i = 0; i < size; i++) - hash_table[i] = NULL; - return TRUE; + hash_table[i] = (wxList *) NULL; + 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; + + hash_table = new wxList *[n]; + for (int i = 0; i < n; i++) { + if (table.hash_table[i] == NULL) + hash_table[i] = NULL; + else { + hash_table[i] = new wxList(key_type); + *(hash_table[i]) = *(table.hash_table[i]); + } + } } -void wxHashTable::Put (const long key, const long value, wxObject * object) +void wxHashTable::Put (long key, long value, wxObject * object) { // Should NEVER be long k = (long) key; - if (k < 0) - k = -k; int position = (int) (k % n); + if (position < 0) position = -position; + if (!hash_table[position]) + { hash_table[position] = new wxList (wxKEY_INTEGER); + if (m_deleteContents) hash_table[position]->DeleteContents(true); + } hash_table[position]->Append (value, object); + m_count++; } -void wxHashTable::Put (const long key, const char *value, wxObject * object) +void wxHashTable::Put (long key, const wxChar *value, wxObject * object) { // Should NEVER be long k = (long) key; - if (k < 0) - k = -k; int position = (int) (k % n); + if (position < 0) position = -position; + if (!hash_table[position]) - hash_table[position] = new wxList (wxKEY_INTEGER); + { + hash_table[position] = new wxList (wxKEY_STRING); + if (m_deleteContents) hash_table[position]->DeleteContents(true); + } hash_table[position]->Append (value, object); + m_count++; } -void wxHashTable::Put (const long key, wxObject * object) +void wxHashTable::Put (long key, wxObject * object) { // Should NEVER be long k = (long) key; - if (k < 0) - k = -k; int position = (int) (k % n); + if (position < 0) position = -position; + if (!hash_table[position]) + { hash_table[position] = new wxList (wxKEY_INTEGER); + if (m_deleteContents) hash_table[position]->DeleteContents(true); + } hash_table[position]->Append (k, object); + m_count++; } -void wxHashTable::Put (const char *key, wxObject * object) +void wxHashTable::Put (const wxChar *key, wxObject * object) { int position = (int) (MakeKey (key) % n); + if (position < 0) position = -position; if (!hash_table[position]) + { hash_table[position] = new wxList (wxKEY_STRING); + if (m_deleteContents) hash_table[position]->DeleteContents(true); + } hash_table[position]->Append (key, object); + m_count++; } -wxObject *wxHashTable::Get (const long key, const long value) const +wxObject *wxHashTable::Get (long key, long value) const { // Should NEVER be long k = (long) key; - if (k < 0) - k = -k; int position = (int) (k % n); + if (position < 0) position = -position; + if (!hash_table[position]) - return NULL; + return (wxObject *) NULL; else { wxNode *node = hash_table[position]->Find (value); if (node) - return node->Data (); + return node->GetData (); else - return NULL; + return (wxObject *) NULL; } } -wxObject *wxHashTable::Get (const long key, const char *value) const +wxObject *wxHashTable::Get (long key, const wxChar *value) const { // Should NEVER be long k = (long) key; - if (k < 0) - k = -k; int position = (int) (k % n); + if (position < 0) position = -position; + if (!hash_table[position]) - return NULL; + return (wxObject *) NULL; else { wxNode *node = hash_table[position]->Find (value); if (node) - return node->Data (); + return node->GetData (); else - return NULL; + return (wxObject *) NULL; } } -wxObject *wxHashTable::Get (const long key) const +wxObject *wxHashTable::Get (long key) const { // Should NEVER be long k = (long) key; - if (k < 0) - k = -k; int position = (int) (k % n); + if (position < 0) position = -position; + if (!hash_table[position]) - return NULL; + return (wxObject *) NULL; else { wxNode *node = hash_table[position]->Find (k); - return node ? node->Data () : (wxObject*)NULL; + return node ? node->GetData () : (wxObject*)NULL; } } -wxObject *wxHashTable::Get (const char *key) const +wxObject *wxHashTable::Get (const wxChar *key) const { int position = (int) (MakeKey (key) % n); + if (position < 0) position = -position; if (!hash_table[position]) - return NULL; + return (wxObject *) NULL; else { wxNode *node = hash_table[position]->Find (key); - return node ? node->Data () : (wxObject*)NULL; + return node ? node->GetData () : (wxObject*)NULL; } } -wxObject *wxHashTable::Delete (const long key) +wxObject *wxHashTable::Delete (long key) { // Should NEVER be long k = (long) key; - if (k < 0) - k = -k; int position = (int) (k % n); + if (position < 0) position = -position; + if (!hash_table[position]) - return NULL; + return (wxObject *) NULL; else { wxNode *node = hash_table[position]->Find (k); if (node) - { - wxObject *data = node->Data (); - delete node; - return data; - } + { + wxObject *data = node->GetData (); + delete node; + m_count--; + return data; + } else - return NULL; + return (wxObject *) NULL; } } -wxObject *wxHashTable::Delete (const char *key) +wxObject *wxHashTable::Delete (const wxChar *key) { int position = (int) (MakeKey (key) % n); + if (position < 0) position = -position; + if (!hash_table[position]) - return NULL; + return (wxObject *) NULL; else { wxNode *node = hash_table[position]->Find (key); if (node) - { - wxObject *data = node->Data (); - delete node; - return data; - } + { + wxObject *data = node->GetData (); + delete node; + m_count--; + return data; + } else - return NULL; + return (wxObject *) NULL; } } -wxObject *wxHashTable::Delete (const long key, const int value) +wxObject *wxHashTable::Delete (long key, int value) { // Should NEVER be long k = (long) key; - if (k < 0) - k = -k; int position = (int) (k % n); + if (position < 0) position = -position; + if (!hash_table[position]) - return NULL; + return (wxObject *) NULL; else { wxNode *node = hash_table[position]->Find (value); if (node) - { - wxObject *data = node->Data (); - delete node; - return data; - } + { + wxObject *data = node->GetData (); + delete node; + m_count--; + return data; + } else - return NULL; + return (wxObject *) NULL; } } -wxObject *wxHashTable::Delete (const long key, const char *value) +wxObject *wxHashTable::Delete (long key, const wxChar *value) { int position = (int) (key % n); + if (position < 0) position = -position; + if (!hash_table[position]) - return NULL; + return (wxObject *) NULL; else { wxNode *node = hash_table[position]->Find (value); if (node) - { - wxObject *data = node->Data (); - delete node; - return data; - } + { + wxObject *data = node->GetData (); + delete node; + m_count--; + return data; + } else - return NULL; + return (wxObject *) NULL; } } -long wxHashTable::MakeKey (const char *string) const +long wxHashTable::MakeKey (const wxChar *string) const { long int_key = 0; while (*string) - int_key += (unsigned char) *string++; + int_key += (wxUChar) *string++; return int_key; } -void wxHashTable::BeginFind (void) +void wxHashTable::BeginFind () { current_position = -1; - current_node = NULL; + current_node = (wxNode *) NULL; } -wxNode *wxHashTable::Next (void) +wxHashTable::Node* wxHashTable::Next () { - wxNode *found = NULL; - bool end = FALSE; + wxNode *found = (wxNode *) NULL; + bool end = false; while (!end && !found) { if (!current_node) - { - current_position++; - if (current_position >= n) - { - current_position = -1; - current_node = NULL; - end = TRUE; - } - else - { - if (hash_table[current_position]) - { - current_node = hash_table[current_position]->First (); - found = current_node; - } - } - } + { + current_position++; + if (current_position >= n) + { + current_position = -1; + current_node = (wxNode *) NULL; + end = true; + } + else + { + if (hash_table[current_position]) + { + current_node = hash_table[current_position]->GetFirst (); + found = current_node; + } + } + } else - { - current_node = current_node->Next (); - found = current_node; - } + { + current_node = current_node->GetNext (); + found = current_node; + } } return found; } -void wxHashTable::DeleteContents (const bool flag) +void wxHashTable::DeleteContents (bool flag) { int i; + m_deleteContents = flag; for (i = 0; i < n; i++) { if (hash_table[i]) - hash_table[i]->DeleteContents (flag); + hash_table[i]->DeleteContents (flag); } } -void wxHashTable::Clear (void) +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