Bring in Leo's <lsh@lubrizol.com> massive changes to libpq++

src/interfaces/libpq++/pgconnection.h

@@ -0,0 +1,75 @@
+/*-------------------------------------------------------------------------
+ *
+ * pgconnection.h
+ *    
+ *
+ *   DESCRIPTION
+ *		Postgres Connection Class: 
+ *		   Manage Postgres backend connection
+ *
+ *   NOTES
+ *      Currently under construction.
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ *-------------------------------------------------------------------------
+ */
+ 
+#ifndef PGCONN_H
+#define PGCONN_H
+
+#include <stdio.h>
+#include "pgenv.h"
+
+extern "C" {
+#include "libpq-fe.h"
+}
+
+
+// ****************************************************************
+//
+// PgConnection - a connection made to a postgres backend
+//
+// ****************************************************************
+// This class contains all the information about the connection
+// to the backend process.  All the database classes should be
+// derived from this class to obtain the connection interface.
+class PgConnection {
+protected:
+  PgEnv pgEnv;		// Current connection environment
+  PGconn* pgConn;	// Connection Structures
+  PGresult* pgResult;	// Query Result
+  string pgErrorMessage; // Error messages container
+  int pgCloseConnection; // Flag indicating whether the connection should be closed or not
+  
+public:
+   PgConnection(const char* dbName); // use reasonable defaults
+   PgConnection(const PgEnv& env, const char* dbName); // connect to the database with 
+                                    // given environment and database name
+   virtual ~PgConnection(); // close connection and clean up
+   
+   // Connection status and error messages
+   ConnStatusType Status();
+   int ConnectionBad() { return Status() == CONNECTION_BAD; }
+   const char* ErrorMessage() const { return pgErrorMessage.c_str(); }
+  
+   // returns the database name of the connection
+   const char* DBName() const { return PQdb(pgConn); }
+
+   // Query Execution interface
+   ExecStatusType Exec(const char* query);  // send a query to the backend
+   int ExecCommandOk(const char* query);    // send a command and check if it's OK
+   int ExecTuplesOk(const char* query);     // send a command and check if tuples are returned
+   PGnotify* Notifies();
+    
+protected:
+   ConnStatusType Connect(const char* dbName);
+   void SetErrorMessage(const string&, int append = 0);
+   string IntToString(int);
+   
+protected:
+   PgConnection();
+   PgConnection(const PgConnection&);
+};
+
+#endif	// PGCONN_H