Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtmail/include/DtMail/Dictionary.hh

@@ -0,0 +1,75 @@
+/*
+ *+SNOTICE
+ *
+ *
+ *	$XConsortium: Dictionary.hh /main/4 1996/04/21 19:44:36 drk $
+ *
+ *	RESTRICTED CONFIDENTIAL INFORMATION:
+ *	
+ *	The information in this document is subject to special
+ *	restrictions in a confidential disclosure agreement bertween
+ *	HP, IBM, Sun, USL, SCO and Univel.  Do not distribute this
+ *	document outside HP, IBM, Sun, USL, SCO, or Univel wihtout
+ *	Sun's specific written approval.  This documment and all copies
+ *	and derivative works thereof must be returned or destroyed at
+ *	Sun's request.
+ *
+ *	Copyright 1993 Sun Microsystems, Inc.  All rights reserved.
+ *
+ *+ENOTICE
+ */
+
+#ifndef _DTM_DICTIONARY_HH
+#define _DTM_DICTIONARY_HH
+
+#include "DtVirtArray.hh"
+
+class DtMailDictionaryImpl : public DtCPlusPlusAllocator {
+  public:
+    // The hash_size must be <= 256. Setting to smaller sizes
+    // will reduce the memory used by the dictionary, but may increase
+    // the hash collisions resulting in slower performance.
+    //
+    DtMailDictionaryImpl(int hash_size = 256);
+    ~DtMailDictionaryImpl(void);
+
+    void set(const char * key, const void * value);
+    const void * lookup(const char * key);
+    void remove(const char * key);
+
+  private:
+    struct Entry : public DtCPlusPlusAllocator {
+	char *			key;
+	const void *		value;
+    };
+
+    typedef DtVirtArray<Entry *> * HashTable_t;
+
+    HashTable_t		*_hash_table;
+    int			_hash_size;
+    void		*_obj_mutex;
+
+    int hashValue(const char * key);
+    void locate(int hash_value, const char * key, Entry ** entry);
+};
+
+template <class Element>
+class DtMailDictionary : public DtCPlusPlusAllocator {
+  public:
+    DtMailDictionary(int hash_size = 256) : _dict(hash_size) { }
+    ~DtMailDictionary(void) { }
+
+    void set(const char * key, const Element value) { _dict.set(key, value); }
+
+    const Element lookup(const char * key) {
+	return((const Element)_dict.lookup(key));
+    }
+
+    void remove(const char * key) { _dict.remove(key); }
+
+  private:
+    DtMailDictionaryImpl	_dict;
+    
+};
+
+#endif