Postgres95 1.01 Distribution - Virgin Sources

src/interfaces/libpq++/pgconnection.cc

@@ -0,0 +1,94 @@
+/*-------------------------------------------------------------------------
+ *
+ *   FILE
+ *	pgconnection.cc
+ *
+ *   DESCRIPTION
+ *      implementation of the PGconnection class.
+ *   PGconnection encapsulates a frontend to backend connection
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * IDENTIFICATION
+ *    $Header: /cvsroot/pgsql/src/interfaces/libpq++/Attic/pgconnection.cc,v 1.1.1.1 1996/07/09 06:22:18 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#include "libpq++.H"
+
+// default constructor
+// checks environment variable for database name
+PGconnection::PGconnection()
+{
+  char* name;
+  PGenv* newenv;
+
+  conn = NULL;
+  result = NULL;
+  errorMessage[0] = '\0';
+
+  newenv = new PGenv(); // use reasonable defaults for the environment
+  if (!(name = getenv(ENV_DEFAULT_DBASE)))
+    return;
+  connect(newenv, name);
+}
+
+// constructor -- for given environment and database name
+PGconnection::PGconnection(PGenv* env, char* dbName)
+{
+  conn = NULL;
+  result = NULL;
+  errorMessage[0] = '\0';
+  connect(env, dbName);
+}
+
+// destructor - closes down the connection and cleanup
+PGconnection::~PGconnection()
+{
+  if (result)	PQclear(result);
+  if (conn)	PQfinish(conn);
+}
+
+// PGconnection::connect
+// establish a connection to a backend
+ConnStatusType
+PGconnection::connect(PGenv* newenv, char* dbName)
+{
+#if 0
+    FILE *debug;
+    debug = fopen("/tmp/trace.out","w");
+    PQtrace(conn, debug);
+#endif
+
+    env = newenv;
+    fe_setauthsvc(env->pgauth, errorMessage); 
+    conn = PQsetdb(env->pghost, env->pgport, env->pgoption, env->pgtty, dbName);
+    if(strlen(errorMessage))
+      return CONNECTION_BAD;
+    else
+      return status();
+}
+
+// PGconnection::status -- return connection or result status
+ConnStatusType
+PGconnection::status()
+{
+    return PQstatus(conn);
+}
+
+// PGconnection::exec  -- send a query to the backend
+ExecStatusType
+PGconnection::exec(char* query)
+{
+  if (result)
+    PQclear(result); 
+
+  result = PQexec(conn, query);
+  if (result)
+      return PQresultStatus(result);
+  else {
+      strcpy(errorMessage, PQerrorMessage(conn));
+      return PGRES_FATAL_ERROR;
+  }
+}