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

cde/programs/dtinfo/DtMmdb/dstr/index_agent.h

@@ -0,0 +1,62 @@
+/*
+ * $XConsortium: index_agent.h /main/3 1996/06/11 17:17:20 cde-hal $
+ *
+ * Copyright (c) 1993 HAL Computer Systems International, Ltd.
+ * All rights reserved.  Unpublished -- rights reserved under
+ * the Copyright Laws of the United States.  USE OF A COPYRIGHT
+ * NOTICE IS PRECAUTIONARY ONLY AND DOES NOT IMPLY PUBLICATION
+ * OR DISCLOSURE.
+ * 
+ * THIS SOFTWARE CONTAINS CONFIDENTIAL INFORMATION AND TRADE
+ * SECRETS OF HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.  USE,
+ * DISCLOSURE, OR REPRODUCTION IS PROHIBITED WITHOUT THE
+ * PRIOR EXPRESS WRITTEN PERMISSION OF HAL COMPUTER SYSTEMS
+ * INTERNATIONAL, LTD.
+ * 
+ *                         RESTRICTED RIGHTS LEGEND
+ * Use, duplication, or disclosure by the Government is subject
+ * to the restrictions as set forth in subparagraph (c)(l)(ii)
+ * of the Rights in Technical Data and Computer Software clause
+ * at DFARS 252.227-7013.
+ *
+ *          HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.
+ *                  1315 Dell Avenue
+ *                  Campbell, CA  95008
+ * 
+ */
+
+
+
+#ifndef _index_agent_h
+#define _index_agent_h 1
+
+#include  "utility/funcs.h"
+#include  "utility/ostring.h"
+#include  "dynhash/data_t.h"
+
+//**************************************************************
+// A abstract index_agent class
+//**************************************************************
+
+class index_agent {
+
+public:
+   index_agent() ;
+   virtual ~index_agent() ;
+
+   virtual Boolean insert(data_t& v) = 0;  // insert a key
+   virtual Boolean remove(data_t& v) = 0;  // remove a key
+   virtual Boolean member(data_t& v) = 0; // member test
+   virtual void clean() = 0; 		   // remove all keys
+
+   virtual int no_keys() const { return n; }; // return key set size
+
+   virtual ostream& asciiOut(ostream& out) = 0;
+   virtual istream& asciiIn(istream& in) = 0;
+
+protected:
+   unsigned int n;          // current key set size
+
+};
+
+#endif