added wxHashTableLong

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6354 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/hash.h

@@ -17,6 +17,7 @@
 #endif
 
 #include "wx/list.h"
+#include "wx/dynarray.h"
 
 // the default size of the hash
 #define wxHASH_SIZE_DEFAULT     (1000)
@@ -71,6 +72,42 @@ private:
     DECLARE_NO_COPY_CLASS(wxHashTableBase);
 };
 
+// ----------------------------------------------------------------------------
+// a hash table which stores longs
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxHashTableLong : public wxObject
+{
+public:
+    wxHashTableLong(size_t size = wxHASH_SIZE_DEFAULT) { Init(size); }
+
+    void Create(size_t size = wxHASH_SIZE_DEFAULT);
+    void Destroy();
+
+    size_t GetSize() const { return m_hashSize; }
+    size_t GetCount() const { return m_count; }
+
+    void Put(long key, long value);
+    long Get(long key) const;
+    long Delete(long key);
+
+protected:
+    void Init(size_t size);
+
+private:
+    wxArrayLong **m_values,
+                **m_keys;
+
+    // the size of array above
+    size_t m_hashSize;
+
+    // the total number of elements in the hash
+    size_t m_count;
+
+    // not implemented yet
+    DECLARE_NO_COPY_CLASS(wxHashTableLong);
+};
+
 // ----------------------------------------------------------------------------
 // for compatibility only
 // ----------------------------------------------------------------------------

src/common/hash.cpp

@@ -119,6 +119,108 @@ wxNodeBase *wxHashTableBase::GetNode(long key, long value) const
     return node;
 }
 
+// ----------------------------------------------------------------------------
+// wxHashTableLong
+// ----------------------------------------------------------------------------
+
+void wxHashTableLong::Init(size_t size)
+{
+    m_hashSize = size;
+    m_values = new wxArrayLong *[size];
+    m_keys = new wxArrayLong *[size];
+
+    for ( size_t n = 0; n < m_hashSize; n++ )
+    {
+        m_values[n] =
+        m_keys[n] = (wxArrayLong *)NULL;
+    }
+
+    m_count = 0;
+}
+
+void wxHashTableLong::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;
+    m_count = 0;
+}
+
+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);
+
+    if ( !m_keys[slot] )
+    {
+        m_keys[slot] = new wxArrayLong;
+        m_values[slot] = new wxArrayLong;
+    }
+
+    m_keys[slot]->Add(key);
+    m_values[slot]->Add(value);
+
+    m_count++;
+}
+
+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);
+
+    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 )
+            {
+                return m_values[slot]->Item(n);
+            }
+        }
+    }
+
+    return wxNOT_FOUND;
+}
+
+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);
+
+    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 )
+            {
+                long val = m_values[slot]->Item(n);
+
+                keys->RemoveAt(n);
+                m_values[slot]->RemoveAt(n);
+
+                m_count--;
+
+                return val;
+            }
+        }
+    }
+
+    return wxNOT_FOUND;
+}
+
 // ----------------------------------------------------------------------------
 // old not type safe wxHashTable
 // ----------------------------------------------------------------------------