The font manager now utilizes a hash table to look up fonts by ID.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14777 a95241bf-73f2-0310-859d-f6bbb57e9c96
2005-11-08 16:49:33 +00:00
parent 5f5dfa87e1
commit ec9b3f7ca1
7 changed files with 301 additions and 12 deletions
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2005, Haiku.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Axel Dörfler, [email protected]
+ */
+#ifndef _HASH_TABLE_H_
+#define _HASH_TABLE_H_
+
+
+#include <SupportDefs.h>
+
+
+class Hashable {
+	public:
+		virtual uint32 Hash() const = 0;
+		virtual bool CompareTo(Hashable& hashable) const = 0;
+};
+
+class HashTable {
+	public:
+		HashTable(int32 capacity = 100, float loadFactor = 0.75);
+		~HashTable();
+
+		void MakeEmpty();
+		bool IsEmpty() const { return fCount == 0; }
+		bool ContainsKey(Hashable& key) const { return _GetHashEntry(key) != NULL; }
+		int32 CountItems() const { return fCount; }
+
+		Hashable *GetValue(Hashable& key) const;
+
+		bool AddItem(Hashable* value);
+		Hashable *RemoveItem(Hashable& key);
+
+	protected:
+		struct entry;
+
+		bool _Rehash();
+		entry *_GetHashEntry(Hashable& key) const;
+
+		entry**	fTable;
+		int32	fCapacity, fCount, fThreshold;
+		float	fLoadFactor;
+};
+
+#endif  /* HASHTABLE_H */