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[wxWidgets.git] / src / iodbc / connect.c
index 11a5bbd0c9a79568995ad76c7e9fa9ad81d4dff6..2bd934f6a2464b237672daf20763f8a1c727aac4 100644 (file)
-/** Connect(load) driver
-
-    Copyright (C) 1995 by Ke Jin <kejin@empress.com>
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-**/
-
-#include       <../iodbc/iodbc.h>
+/*
+ *  connect.c
+ *
+ *  $Id$
+ *
+ *  Connect (load) driver
+ *
+ *  The iODBC driver manager.
+ *  
+ *  Copyright (C) 1995 by Ke Jin <kejin@empress.com> 
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public
+ *  License along with this library; if not, write to the Free
+ *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
 
-#include       <../iodbc/isql.h>
-#include       <../iodbc/isqlext.h>
+#include       "config.h"
 
-#include        <../iodbc/dlproc.h>
+#include       "isql.h"
+#include       "isqlext.h"
 
-#include       <../iodbc/herr.h>
-#include       <../iodbc/henv.h>
-#include       <../iodbc/hdbc.h>
-#include       <../iodbc/hstmt.h>
+#include       "dlproc.h"
 
-#include       <../iodbc/itrace.h>
+#include       "herr.h"
+#include       "henv.h"
+#include       "hdbc.h"
+#include       "hstmt.h"
 
-#include        <strings.h>
-#include        <stdio.h>
+#include       "itrace.h"
 
-extern  char*   _iodbcdm_getkeyvalbydsn();
-extern  char*   _iodbcdm_getkeyvalinstr();
-extern  RETCODE _iodbcdm_driverunload();
+extern char*   _iodbcdm_getkeyvalbydsn();
+extern char*   _iodbcdm_getkeyvalinstr();
+extern RETCODE _iodbcdm_driverunload();
 
 /*
- *   Following id string is a copyright mark. Removing(i.e. use
- *   souce code of this package without it or make it not appear
- *   in the final object file) or modifing it without permission
- *   from original author(kejin@empress.com) are copyright
+ *   Following id string is a copyright mark. Removing(i.e. use 
+ *   souce code of this package without it or make it not appear 
+ *   in the final object file) or modifing it without permission 
+ *   from original author(kejin@empress.com) are copyright 
  *   violation.
  */
-static  char sccsid[]
-        = "@(#)iODBC driver manager " "2.12" ", Copyright(c) 1995 by Ke Jin";
+static char sccsid[] 
+       = "@(#)iODBC driver manager 2.5, Copyright(c) 1995 by Ke Jin";
 
-static RETCODE  _iodbcdm_driverload(
-                        char FAR*       path,
-                        HDBC            hdbc )
-/* - Load driver share library( or increase its reference count
+/* - Load driver share library( or increase its reference count 
  *   if it has already been loaded by another active connection)
  * - Call driver's SQLAllocEnv() (for the first reference only)
  * - Call driver's SQLAllocConnect()
  * - Call driver's SQLSetConnectOption() (set login time out)
  * - Increase the bookkeeping reference count
  */
+static RETCODE 
+_iodbcdm_driverload (
+    char FAR * path,
+    HDBC hdbc)
 {
-        DBC_t  FAR*     pdbc = (DBC_t FAR*)hdbc;
-        GENV_t FAR*     genv;
-        ENV_t  FAR*     penv = NULL;
-        HDLL            hdll;
-        HPROC           hproc;
-        RETCODE         retcode = SQL_SUCCESS;
-        int             sqlstat = en_00000;
-
-       if(pdbc->trace)
+  DBC_t FAR *pdbc = (DBC_t FAR *) hdbc;
+  GENV_t FAR *genv;
+  ENV_t FAR *penv = NULL;
+  HDLL hdll;
+  HPROC hproc;
+  RETCODE retcode = SQL_SUCCESS;
+  int sqlstat = en_00000;
+
+  if (path == NULL || path[0] == '\0')
+    {
+      PUSHSQLERR (pdbc->herr, en_IM002);
+
+      return SQL_ERROR;
+    }
+
+  if (hdbc == SQL_NULL_HDBC || pdbc->genv == SQL_NULL_HENV)
+    {
+      return SQL_INVALID_HANDLE;
+    }
+
+  genv = (GENV_t FAR *) pdbc->genv;
+
+  /* This will either load the driver dll or increase its reference count */
+  hdll = _iodbcdm_dllopen ((char FAR *) path);
+
+  if (hdll == SQL_NULL_HDLL)
+    {
+      PUSHSYSERR (pdbc->herr, _iodbcdm_dllerror ());
+      PUSHSQLERR (pdbc->herr, en_IM003);
+      return SQL_ERROR;
+    }
+
+  penv = (ENV_t FAR *) (pdbc->henv);
+
+  if (penv != NULL)
+    {
+      if (penv->hdll != hdll)
        {
-         fprintf(pdbc->tstm, "_iodbcdm_driverload(%s, 0x%x)\n", path, (int)hdbc);
+         _iodbcdm_driverunload (hdbc);
+       }
+      else
+       {
+         /* 
+          * this will not unload the driver but only decrease its internal
+          * reference count 
+          */
+         _iodbcdm_dllclose (hdll);
+       }
+    }
+
+  if (penv == NULL)
+    {
+      /* 
+       * find out whether this dll has already been loaded on another 
+       * connection 
+       */
+      for (penv = (ENV_t FAR *) genv->henv; 
+         penv != NULL;
+         penv = (ENV_t FAR *) penv->next)
+       {
+         if (penv->hdll == hdll)
+           {
+             /* 
+              * this will not unload the driver but only decrease its internal
+              * reference count 
+              */
+             _iodbcdm_dllclose (hdll);
+             break;
+           }
        }
 
-        if( path == NULL || path[0] == '\0' )
-        {
-                PUSHSQLERR ( pdbc->herr, en_IM002 );
-
-                return SQL_ERROR;
-        }
-
-        if( hdbc == SQL_NULL_HDBC
-         || pdbc->genv == SQL_NULL_HENV )
-        {
-                return SQL_INVALID_HANDLE;
-        }
-
-        genv = (GENV_t FAR*)pdbc->genv;
-
-        hdll = _iodbcdm_dllopen( (char FAR*) path );
-                                 /* This will either load the
-                                  * driver dll or increase its
-                                  * reference count */
-
-        if( hdll == SQL_NULL_HDLL )
-        {
-         if(pdbc->trace)
-         {
-           fprintf(pdbc->tstm, "ERROR: _iodbcdm_driverload cannot load driver - '%s'\n", _iodbcdm_dllerror());
-         }
-
-                PUSHSYSERR ( pdbc->herr, _iodbcdm_dllerror() );
-                PUSHSQLERR ( pdbc->herr, en_IM003 );
-                return SQL_ERROR;
-        }
-
-        penv = (ENV_t FAR*)(pdbc->henv);
-
-        if( penv != NULL )
-        {
-                if( penv->hdll != hdll )
-                {
-                        _iodbcdm_driverunload(hdbc);
-                }
-                else
-                {
-                        _iodbcdm_dllclose( hdll );
-                        /* this will not unload the driver
-                         * but only decrease its internal
-                         * reference count
-                         */
-                }
-        }
-
-        if(penv == NULL )
-        {
-                /* find out whether this dll has already
-                 * been loaded on another connection */
-                for( penv  = (ENV_t FAR*)genv->henv;
-                     penv != NULL;
-                     penv  = (ENV_t FAR*)penv->next )
-                {
-                        if( penv->hdll == hdll )
-                        {
-                                _iodbcdm_dllclose( hdll );
-                                /* this will not unload the driver
-                                 * but only decrease its internal
-                                 * reference count
-                                 */
-                                break;
-                        }
-                }
-
-                if( penv == NULL )
-                /* no connection attaching with this dll */
-                {
-                        int     i;
-
-                        /* create a new dll env instance */
-                        penv = (ENV_t FAR*)MEM_ALLOC ( sizeof(ENV_t) );
-
-                        if( penv == NULL )
-                        {
-                                _iodbcdm_dllclose(hdll);
-
-                                PUSHSQLERR ( pdbc->herr, en_S1001 );
-
-                                return SQL_ERROR;
-                        }
-
-                        for( i = 0; i< SQL_EXT_API_LAST + 1; i++)
-                        {
-                                (penv->dllproc_tab)[i] = SQL_NULL_HPROC;
-                        }
-
-                        pdbc->henv = penv;
-                        penv->hdll = hdll;
-
-                        /* call driver's SQLAllocHandle() or SQLAllocEnv() */
+      if (penv == NULL)
+       /* no connection attaching with this dll */
+       {
+         int i;
+
+         /* create a new dll env instance */
+         penv = (ENV_t FAR *) MEM_ALLOC (sizeof (ENV_t));
+
+         if (penv == NULL)
+           {
+             _iodbcdm_dllclose (hdll);
+
+             PUSHSQLERR (pdbc->herr, en_S1001);
+
+             return SQL_ERROR;
+           }
+
+         for (i = 0; i < SQL_EXT_API_LAST + 1; i++)
+           {
+             (penv->dllproc_tab)[i] = SQL_NULL_HPROC;
+           }
+
+         pdbc->henv = penv;
+         penv->hdll = hdll;
+
+         /* call driver's SQLAllocHandle() or SQLAllocEnv() */
+
 #if (ODBCVER >= 0x0300)
-                        hproc = _iodbcdm_getproc( hdbc, en_AllocHandle );
-
-                        if( hproc )
-                        {
-                                CALL_DRIVER ( hdbc, retcode, hproc, en_AllocHandle,
-                                        ( SQL_HANDLE_ENV, SQL_NULL_HANDLE, &(penv->dhenv) )
-                        }
-                        else /* try driver's SQLAllocEnv() */
+         hproc = _iodbcdm_getproc (hdbc, en_AllocHandle);
+
+         if (hproc)
+           {
+             CALL_DRIVER (hdbc, retcode, hproc, en_AllocHandle,
+                 (SQL_HANDLE_ENV, SQL_NULL_HANDLE, &(penv->dhenv)))
+           }
+         else                  /* try driver's SQLAllocEnv() */
 #endif
-                        {
-                                hproc = _iodbcdm_getproc( hdbc, en_AllocEnv );
-
-                                if( hproc == SQL_NULL_HPROC)
-                                {
-                                        sqlstat = en_IM004;
-                                }
-                                else
-                                {
-                                        CALL_DRIVER ( hdbc, retcode, hproc,
-                                        en_AllocEnv, (&(penv->dhenv)) )
-                                }
-                        }
-
-                        if( retcode == SQL_ERROR )
-                        {
-                                sqlstat = en_IM004;
-                        }
-
-                        if( sqlstat != en_00000 )
-                        {
-                                _iodbcdm_dllclose ( hdll );
-                                MEM_FREE ( penv );
-                                PUSHSQLERR ( pdbc->herr, en_IM004 );
-
-                                return SQL_ERROR;
-                        }
-
-                        /* insert into dll env list */
-                        penv->next = (ENV_t FAR*)genv->henv;
-                        genv->henv = penv;
-
-                        /* initiate this new env entry */
-                        penv->refcount = 0;     /* we will increase it after
-                                                 * driver's SQLAllocConnect()
-                                                 * success
-                                                 */
-                }
-
-                pdbc->henv = penv;
-
-                if( pdbc->dhdbc == SQL_NULL_HDBC )
-                {
+           {
+             hproc = _iodbcdm_getproc (hdbc, en_AllocEnv);
+
+             if (hproc == SQL_NULL_HPROC)
+               {
+                 sqlstat = en_IM004;
+               }
+             else
+               {
+                 CALL_DRIVER (hdbc, retcode, hproc,
+                     en_AllocEnv, (&(penv->dhenv)))
+               }
+           }
+
+         if (retcode == SQL_ERROR)
+           {
+             sqlstat = en_IM004;
+           }
+
+         if (sqlstat != en_00000)
+           {
+             _iodbcdm_dllclose (hdll);
+             MEM_FREE (penv);
+             PUSHSQLERR (pdbc->herr, en_IM004);
+
+             return SQL_ERROR;
+           }
+
+         /* insert into dll env list */
+         penv->next = (ENV_t FAR *) genv->henv;
+         genv->henv = penv;
+
+         /* initiate this new env entry */
+         penv->refcount = 0;   /* we will increase it after
+                                * driver's SQLAllocConnect()
+                                * success
+                                */
+       }
+
+      pdbc->henv = penv;
+
+      if (pdbc->dhdbc == SQL_NULL_HDBC)
+       {
+
 #if (ODBCVER >= 0x0300)
-                        hproc = _iodbcdm_getproc( hdbc, en_AllocHandle );
-
-                        if( hproc )
-                        {
-                                CALL_DRIVER( hdbc, retcode, hproc, en_AllocHandle,
-                                (SQL_HANDLE_DBC, penv->dhenv, &(pdbc->dhdbc)) )
-                        }
-                        else
+         hproc = _iodbcdm_getproc (hdbc, en_AllocHandle);
+
+         if (hproc)
+           {
+             CALL_DRIVER (hdbc, retcode, hproc, en_AllocHandle,
+                 (SQL_HANDLE_DBC, penv->dhenv, &(pdbc->dhdbc)))
+           }
+         else
 #endif
-                        {
-                                hproc = _iodbcdm_getproc( hdbc, en_AllocConnect );
-
-                                if( hproc == SQL_NULL_HPROC )
-                                {
-                                        sqlstat = en_IM005;
-                                }
-                                else
-                                {
-                                        CALL_DRIVER ( hdbc, retcode, hproc,
-                                        en_AllocConnect, (penv->dhenv, &(pdbc->dhdbc)) )
-                                }
-                        }
-
-                        if( retcode == SQL_ERROR )
-                        {
-                                sqlstat = en_IM005;
-                        }
-
-                        if( sqlstat != en_00000 )
-                        {
-                                _iodbcdm_driverunload(hdbc);
-
-                                pdbc->dhdbc = SQL_NULL_HDBC;
-                                PUSHSQLERR ( pdbc->herr, en_IM005 );
-
-                                return SQL_ERROR;
-                        }
-                }
-
-                pdbc->henv = penv;
-                penv->refcount ++;  /* bookkeeping reference count on this driver */
-        }
-
-        /* driver's login timeout option must been set before
-         * its SQLConnect() call */
-        if( pdbc->login_timeout != 0UL )
-        {
-                hproc = _iodbcdm_getproc( hdbc, en_SetConnectOption );
-
-                if( hproc == SQL_NULL_HPROC )
-                {
-                        sqlstat = en_IM004;
-                }
-                else
-                {
-                        CALL_DRIVER ( hdbc, retcode, hproc,
-                        en_SetConnectOption, (
-                                pdbc->dhdbc,
-                                SQL_LOGIN_TIMEOUT,
-                                pdbc->login_timeout ) )
-
-                        if( retcode == SQL_ERROR )
-                        {
-                                PUSHSQLERR ( pdbc->herr, en_IM006 );
-
-                                return SQL_SUCCESS_WITH_INFO;
-                        }
-                }
-        }
-
-        return SQL_SUCCESS;
+
+           {
+             hproc = _iodbcdm_getproc (hdbc, en_AllocConnect);
+
+             if (hproc == SQL_NULL_HPROC)
+               {
+                 sqlstat = en_IM005;
+               }
+             else
+               {
+                 CALL_DRIVER (hdbc, retcode, hproc,
+                     en_AllocConnect, (penv->dhenv, &(pdbc->dhdbc)))
+               }
+           }
+
+         if (retcode == SQL_ERROR)
+           {
+             sqlstat = en_IM005;
+           }
+
+         if (sqlstat != en_00000)
+           {
+             _iodbcdm_driverunload (hdbc);
+
+             pdbc->dhdbc = SQL_NULL_HDBC;
+             PUSHSQLERR (pdbc->herr, en_IM005);
+
+             return SQL_ERROR;
+           }
+       }
+
+      pdbc->henv = penv;
+      penv->refcount++;                /* bookkeeping reference count on this driver */
+    }
+
+  /* driver's login timeout option must been set before 
+   * its SQLConnect() call */
+  if (pdbc->login_timeout != 0UL)
+    {
+      hproc = _iodbcdm_getproc (hdbc, en_SetConnectOption);
+
+      if (hproc == SQL_NULL_HPROC)
+       {
+         sqlstat = en_IM004;
+       }
+      else
+       {
+         CALL_DRIVER (hdbc, retcode, hproc,
+             en_SetConnectOption, (
+                 pdbc->dhdbc,
+                 SQL_LOGIN_TIMEOUT,
+                 pdbc->login_timeout))
+
+             if (retcode == SQL_ERROR)
+           {
+             PUSHSQLERR (pdbc->herr, en_IM006);
+
+             return SQL_SUCCESS_WITH_INFO;
+           }
+       }
+    }
+
+  return SQL_SUCCESS;
 }
 
-RETCODE _iodbcdm_driverunload( HDBC     hdbc )
+
 /* - Call driver's SQLFreeConnect()
  * - Call driver's SQLFreeEnv() ( for the last reference only)
  * - Unload the share library( or decrease its reference
@@ -298,1079 +299,943 @@ RETCODE _iodbcdm_driverunload( HDBC     hdbc )
  * - decrease bookkeeping reference count
  * - state transition to allocated
  */
+RETCODE 
+_iodbcdm_driverunload (HDBC hdbc)
 {
-        DBC_t  FAR*     pdbc = (DBC_t FAR*)hdbc;
-        ENV_t  FAR*     penv;
-        ENV_t  FAR*     tpenv;
-        GENV_t FAR*     genv;
-        HPROC           hproc;
-        RETCODE         retcode = SQL_SUCCESS;
-        int             sqlstat = en_00000;
-
-        if( hdbc == SQL_NULL_HDBC )
-        {
-                return SQL_INVALID_HANDLE;
-        }
-
-        /* no pointer check will be performed in this function */
-        penv = (ENV_t  FAR*)pdbc->henv;
-        genv = (GENV_t FAR*)pdbc->genv;
-
-        if( penv == NULL
-         || penv->hdll == SQL_NULL_HDLL )
-        {
-                return SQL_SUCCESS;
-        }
+  DBC_t FAR *pdbc = (DBC_t FAR *) hdbc;
+  ENV_t FAR *penv;
+  ENV_t FAR *tpenv;
+  GENV_t FAR *genv;
+  HPROC hproc;
+  RETCODE retcode = SQL_SUCCESS;
+
+  if (hdbc == SQL_NULL_HDBC)
+    {
+      return SQL_INVALID_HANDLE;
+    }
+
+  /* no pointer check will be performed in this function */
+  penv = (ENV_t FAR *) pdbc->henv;
+  genv = (GENV_t FAR *) pdbc->genv;
+
+  if (penv == NULL || penv->hdll == SQL_NULL_HDLL)
+    {
+      return SQL_SUCCESS;
+    }
 
 #if (ODBCVER >= 0x0300)
-        hproc = _iodbcdm_getproc( hdbc, en_FreeHandle );
-
-        if( hproc )
-        {
-                CALL_DRIVER ( hdbc, retcode, hproc, en_FreeHandle,
-                        ( SQL_HANDLE_DBC, pdbc->dhdbc ) )
-        }
-        else
+  hproc = _iodbcdm_getproc (hdbc, en_FreeHandle);
+
+  if (hproc)
+    {
+      CALL_DRIVER (hdbc, retcode, hproc, en_FreeHandle,
+         (SQL_HANDLE_DBC, pdbc->dhdbc))
+    }
+  else
 #endif
-        {
-                hproc = _iodbcdm_getproc( hdbc, en_FreeConnect );
 
-                if( hproc != SQL_NULL_HPROC )
-                {
-                        CALL_DRIVER ( hdbc, retcode, hproc,
-                        en_FreeConnect, ( pdbc->dhdbc ) )
+    {
+      hproc = _iodbcdm_getproc (hdbc, en_FreeConnect);
 
-                        pdbc->dhdbc = SQL_NULL_HDBC;
-                }
-        }
+      if (hproc != SQL_NULL_HPROC)
+       {
+         CALL_DRIVER (hdbc, retcode, hproc,
+             en_FreeConnect, (pdbc->dhdbc))
 
-        penv->refcount --;
+             pdbc->dhdbc = SQL_NULL_HDBC;
+       }
+    }
+
+  penv->refcount--;
+
+  if (!penv->refcount)
+    /* no other connections still attaching with this driver */
+    {
 
-        if( ! penv->refcount )
-        /* no other connections still attaching with this driver */
-        {
 #if (ODBCVER >= 0x0300)
-                hproc = _iodbcdm_getproc( hdbc, en_FreeHandle );
-
-                if( hproc )
-                {
-                        CALL_DRIVER ( hdbc, retcode, hproc, en_FreeHandle,
-                                ( SQL_HANDLE_ENV, penv->dhenv ) )
-                }
-                else
+      hproc = _iodbcdm_getproc (hdbc, en_FreeHandle);
+
+      if (hproc)
+       {
+         CALL_DRIVER (hdbc, retcode, hproc, en_FreeHandle,
+             (SQL_HANDLE_ENV, penv->dhenv))
+       }
+      else
 #endif
-                {
-                        hproc = _iodbcdm_getproc( hdbc, en_FreeEnv );
-
-                        if( hproc != SQL_NULL_HPROC )
-                        {
-                                CALL_DRIVER ( hdbc, retcode, hproc, en_FreeEnv,
-                                                ( penv->dhenv ) )
-
-                                penv->dhenv = SQL_NULL_HENV;
-                        }
-                }
-
-                _iodbcdm_dllclose ( penv->hdll );
-
-                penv->hdll == SQL_NULL_HDLL;
-
-                for( tpenv  = (ENV_t FAR*)genv->henv;
-                     tpenv != NULL;
-                     tpenv  = (ENV_t FAR*)penv->next )
-                {
-                        if( tpenv == penv )
-                        {
-                                genv->henv = penv->next;
-                                break;
-                        }
-
-                        if( tpenv->next == penv )
-                        {
-                                tpenv->next = penv->next;
-                                break;
-                        }
-                }
-
-                MEM_FREE( penv );
-        }
-
-        pdbc->henv = SQL_NULL_HENV;
-        pdbc->hstmt= SQL_NULL_HSTMT;
-        /* pdbc->herr = SQL_NULL_HERR;
-                -- delay to DM's SQLFreeConnect() */
-        pdbc->dhdbc= SQL_NULL_HDBC;
-        pdbc->state= en_dbc_allocated;
-
-        /* set connect options to default values */
-        /**********
-        pdbc->access_mode       = SQL_MODE_DEFAULT;
-        pdbc->autocommit        = SQL_AUTOCOMMIT_DEFAULT;
-        pdbc->login_timeout     = 0UL;
-        **********/
-        pdbc->odbc_cursors      = SQL_CUR_DEFAULT;
-        pdbc->packet_size       = 0UL;
-        pdbc->quiet_mode        = (UDWORD)NULL;
-        pdbc->txn_isolation     = SQL_TXN_READ_UNCOMMITTED;
-
-        if( pdbc->current_qualifier != NULL )
-        {
-                MEM_FREE ( pdbc->current_qualifier );
-                pdbc->current_qualifier = NULL;
-        }
-
-        return SQL_SUCCESS;
+
+       {
+         hproc = _iodbcdm_getproc (hdbc, en_FreeEnv);
+
+         if (hproc != SQL_NULL_HPROC)
+           {
+             CALL_DRIVER (hdbc, retcode, hproc, en_FreeEnv,
+                 (penv->dhenv))
+
+                 penv->dhenv = SQL_NULL_HENV;
+           }
+       }
+
+      _iodbcdm_dllclose (penv->hdll);
+
+      penv->hdll = SQL_NULL_HDLL;
+
+      for (tpenv = (ENV_t FAR *) genv->henv;
+         tpenv != NULL;
+         tpenv = (ENV_t FAR *) penv->next)
+       {
+         if (tpenv == penv)
+           {
+             genv->henv = penv->next;
+             break;
+           }
+
+         if (tpenv->next == penv)
+           {
+             tpenv->next = penv->next;
+             break;
+           }
+       }
+
+      MEM_FREE (penv);
+    }
+
+  pdbc->henv = SQL_NULL_HENV;
+  pdbc->hstmt = SQL_NULL_HSTMT;
+  /* pdbc->herr = SQL_NULL_HERR; 
+     -- delay to DM's SQLFreeConnect() */
+  pdbc->dhdbc = SQL_NULL_HDBC;
+  pdbc->state = en_dbc_allocated;
+
+  /* set connect options to default values */
+       /**********
+       pdbc->access_mode       = SQL_MODE_DEFAULT;
+       pdbc->autocommit        = SQL_AUTOCOMMIT_DEFAULT;
+       pdbc->login_timeout     = 0UL;
+       **********/
+  pdbc->odbc_cursors = SQL_CUR_DEFAULT;
+  pdbc->packet_size = 0UL;
+  pdbc->quiet_mode = (UDWORD) NULL;
+  pdbc->txn_isolation = SQL_TXN_READ_UNCOMMITTED;
+
+  if (pdbc->current_qualifier != NULL)
+    {
+      MEM_FREE (pdbc->current_qualifier);
+      pdbc->current_qualifier = NULL;
+    }
+
+  return SQL_SUCCESS;
 }
 
-static RETCODE  _iodbcdm_dbcdelayset( HDBC hdbc )
+
+static RETCODE 
+_iodbcdm_dbcdelayset (HDBC hdbc)
 {
-        DBC_t FAR*      pdbc    = (DBC_t FAR*)hdbc;
-        ENV_t FAR*      penv;
-        HPROC           hproc;
-        RETCODE         retcode = SQL_SUCCESS;
-        RETCODE         ret;
-
-        penv = pdbc->henv;
-
-        hproc = _iodbcdm_getproc( hdbc, en_SetConnectOption );
-
-        if( hproc == SQL_NULL_HPROC )
-        {
-                PUSHSQLERR ( pdbc->herr, en_IM006 );
-
-                return SQL_SUCCESS_WITH_INFO;
-        }
-
-        if( pdbc->access_mode != SQL_MODE_DEFAULT )
-        {
-                CALL_DRIVER ( hdbc, ret, hproc,
-                        en_SetConnectOption, (
-                                SQL_ACCESS_MODE,
-                                pdbc->access_mode) )
-
-                retcode |= ret;
-        }
-
-        if( pdbc->autocommit != SQL_AUTOCOMMIT_DEFAULT )
-        {
-                CALL_DRIVER ( hdbc, ret, hproc,
-                        en_SetConnectOption, (
-                                pdbc->dhdbc,
-                                SQL_AUTOCOMMIT,
-                                pdbc->autocommit ) )
-
-                retcode |= ret;
-        }
-
-        if( pdbc->current_qualifier != NULL )
-        {
-                CALL_DRIVER ( hdbc, ret, hproc,
-                        en_SetConnectOption, (
-                                pdbc->dhdbc,
-                                SQL_CURRENT_QUALIFIER,
-                                pdbc->current_qualifier ) )
-
-                retcode |= ret;
-        }
-
-        if( pdbc->packet_size != 0UL )
-        {
-                CALL_DRIVER ( hdbc, ret, hproc,
-                        en_SetConnectOption, (
-                                pdbc->dhdbc,
-                                SQL_PACKET_SIZE,
-                                pdbc->packet_size ) )
-
-                retcode |= ret;
-        }
-
-        if( pdbc->quiet_mode != (UDWORD)NULL )
-        {
-                CALL_DRIVER ( hdbc, ret, hproc,
-                        en_SetConnectOption, (
-                                pdbc->dhdbc,
-                                SQL_QUIET_MODE,
-                                pdbc->quiet_mode ) )
-
-                retcode |= ret;
-        }
-
-        if( pdbc->txn_isolation != SQL_TXN_READ_UNCOMMITTED )
-        {
-                CALL_DRIVER ( hdbc, ret, hproc,
-                        en_SetConnectOption, (
-                                pdbc->dhdbc,
-                                SQL_TXN_ISOLATION,
-                                pdbc->txn_isolation ) )
-        }
-
-        /* check error code for driver's SQLSetConnectOption() call */
-        if( retcode != SQL_SUCCESS
-         && retcode != SQL_SUCCESS_WITH_INFO )
-        {
-                PUSHSQLERR ( pdbc->herr, en_IM006 );
-
-                retcode = SQL_ERROR;
-        }
-
-        /* get cursor behavior on transaction commit or rollback */
-        hproc = _iodbcdm_getproc( hdbc, en_GetInfo );
-
-        if( hproc == SQL_NULL_HPROC )
-        {
-                PUSHSQLERR ( pdbc->herr, en_01000 );
-
-                return retcode;
-        }
-
-        CALL_DRIVER ( hdbc, ret, hproc,
-                en_GetInfo, (
-                        pdbc->dhdbc,
-                        SQL_CURSOR_COMMIT_BEHAVIOR,
-                        (PTR)&(pdbc->cb_commit),
-                        sizeof(pdbc->cb_commit),
-                        NULL ) )
-
-        retcode |= ret;
-
-        CALL_DRIVER ( hdbc, ret, hproc,
-                en_GetInfo, (
-                        pdbc->dhdbc,
-                        SQL_CURSOR_ROLLBACK_BEHAVIOR,
-                        (PTR)&(pdbc->cb_rollback),
-                        sizeof(pdbc->cb_rollback),
-                        NULL ) )
-
-        retcode |= ret;
-
-        if( retcode != SQL_SUCCESS
-         && retcode != SQL_SUCCESS_WITH_INFO )
-        {
-                return SQL_ERROR;
-        }
-
-        return retcode;
+  DBC_t FAR *pdbc = (DBC_t FAR *) hdbc;
+  ENV_t FAR *penv;
+  HPROC hproc;
+  RETCODE retcode = SQL_SUCCESS;
+  RETCODE ret;
+
+  penv = pdbc->henv;
+
+  hproc = _iodbcdm_getproc (hdbc, en_SetConnectOption);
+
+  if (hproc == SQL_NULL_HPROC)
+    {
+      PUSHSQLERR (pdbc->herr, en_IM006);
+
+      return SQL_SUCCESS_WITH_INFO;
+    }
+
+  if (pdbc->access_mode != SQL_MODE_DEFAULT)
+    {
+      CALL_DRIVER (hdbc, ret, hproc,
+         en_SetConnectOption, (
+             SQL_ACCESS_MODE,
+             pdbc->access_mode))
+
+         retcode |= ret;
+    }
+
+  if (pdbc->autocommit != SQL_AUTOCOMMIT_DEFAULT)
+    {
+      CALL_DRIVER (hdbc, ret, hproc,
+         en_SetConnectOption, (
+             pdbc->dhdbc,
+             SQL_AUTOCOMMIT,
+             pdbc->autocommit))
+
+         retcode |= ret;
+    }
+
+  if (pdbc->current_qualifier != NULL)
+    {
+      CALL_DRIVER (hdbc, ret, hproc,
+         en_SetConnectOption, (
+             pdbc->dhdbc,
+             SQL_CURRENT_QUALIFIER,
+             pdbc->current_qualifier))
+
+         retcode |= ret;
+    }
+
+  if (pdbc->packet_size != 0UL)
+    {
+      CALL_DRIVER (hdbc, ret, hproc,
+         en_SetConnectOption, (
+             pdbc->dhdbc,
+             SQL_PACKET_SIZE,
+             pdbc->packet_size))
+
+         retcode |= ret;
+    }
+
+  if (pdbc->quiet_mode != (UDWORD) NULL)
+    {
+      CALL_DRIVER (hdbc, ret, hproc,
+         en_SetConnectOption, (
+             pdbc->dhdbc,
+             SQL_QUIET_MODE,
+             pdbc->quiet_mode))
+
+         retcode |= ret;
+    }
+
+  if (pdbc->txn_isolation != SQL_TXN_READ_UNCOMMITTED)
+    {
+      CALL_DRIVER (hdbc, ret, hproc,
+         en_SetConnectOption, (
+             pdbc->dhdbc,
+             SQL_TXN_ISOLATION,
+             pdbc->txn_isolation))
+    }
+
+  /* check error code for driver's SQLSetConnectOption() call */
+  if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO)
+    {
+      PUSHSQLERR (pdbc->herr, en_IM006);
+
+      retcode = SQL_ERROR;
+    }
+
+  /* get cursor behavior on transaction commit or rollback */
+  hproc = _iodbcdm_getproc (hdbc, en_GetInfo);
+
+  if (hproc == SQL_NULL_HPROC)
+    {
+      PUSHSQLERR (pdbc->herr, en_01000);
+
+      return retcode;
+    }
+
+  CALL_DRIVER (hdbc, ret, hproc,
+      en_GetInfo, (
+         pdbc->dhdbc,
+         SQL_CURSOR_COMMIT_BEHAVIOR,
+         (PTR) & (pdbc->cb_commit),
+         sizeof (pdbc->cb_commit),
+         NULL))
+
+      retcode |= ret;
+
+  CALL_DRIVER (hdbc, ret, hproc,
+      en_GetInfo, (
+         pdbc->dhdbc,
+         SQL_CURSOR_ROLLBACK_BEHAVIOR,
+         (PTR) & (pdbc->cb_rollback),
+         sizeof (pdbc->cb_rollback),
+         NULL))
+
+      retcode |= ret;
+
+  if (retcode != SQL_SUCCESS
+      && retcode != SQL_SUCCESS_WITH_INFO)
+    {
+      return SQL_ERROR;
+    }
+
+  return retcode;
 }
 
-static RETCODE  _iodbcdm_settracing( HDBC hdbc, char* dsn, int dsnlen )
+
+static RETCODE 
+_iodbcdm_settracing (HDBC hdbc, char *dsn, int dsnlen)
 {
-        char    buf[256];
-        char*   ptr;
-        RETCODE setopterr = SQL_SUCCESS;
-
-        /* Get Driver's DLL path from specificed or default dsn section */
-        ptr = _iodbcdm_getkeyvalbydsn( dsn, dsnlen, "TraceFile",
-                                (char FAR*)buf, sizeof(buf));
-
-        if( ptr == NULL || ptr[0] == '\0' )
-        {
-                ptr = (char FAR*)(SQL_OPT_TRACE_FILE_DEFAULT);
-        }
-
-        setopterr |= SQLSetConnectOption( hdbc,
-                SQL_OPT_TRACEFILE, (UDWORD)(ptr));
-
-        ptr = _iodbcdm_getkeyvalbydsn( dsn, dsnlen, "Trace",
-                                (char FAR*)buf, sizeof(buf));
-
-        if( ptr != NULL )
-        {
-                UDWORD  opt = (UDWORD)(-1L);
-
-                if( STREQ(ptr, "ON")
-                 || STREQ(ptr, "On")
-                 || STREQ(ptr, "on")
-                 || STREQ(ptr, "1" ) )
-                {
-                        opt = SQL_OPT_TRACE_ON;
-                }
-
-                if( STREQ(ptr, "OFF")
-                 || STREQ(ptr, "Off")
-                 || STREQ(ptr, "off")
-                 || STREQ(ptr, "0"  ) )
-                {
-                        opt = SQL_OPT_TRACE_OFF;
-                }
-
-                if( opt != (UDWORD)(-1L) )
-                {
-                        setopterr |= SQLSetConnectOption( hdbc,
-                                SQL_OPT_TRACE, opt);
-                }
-        }
-       return SQL_SUCCESS;
+  char buf[256];
+  char *ptr;
+  RETCODE setopterr = SQL_SUCCESS;
+
+  /* Get Driver's DLL path from specificed or default dsn section */
+  ptr = _iodbcdm_getkeyvalbydsn (dsn, dsnlen, "TraceFile",
+      (char FAR *) buf, sizeof (buf));
+
+  if (ptr == NULL || ptr[0] == '\0')
+    {
+      ptr = (char FAR *) (SQL_OPT_TRACE_FILE_DEFAULT);
+    }
+
+  setopterr |= SQLSetConnectOption (hdbc, SQL_OPT_TRACEFILE, (UDWORD) (ptr));
+
+  ptr = _iodbcdm_getkeyvalbydsn (dsn, dsnlen, "Trace",
+      (char FAR *) buf, sizeof (buf));
+
+  if (ptr != NULL)
+    {
+      UDWORD opt = (UDWORD) (-1L);
+
+      if (STREQ (ptr, "ON")
+         || STREQ (ptr, "On")
+         || STREQ (ptr, "on")
+         || STREQ (ptr, "1"))
+       {
+         opt = SQL_OPT_TRACE_ON;
+       }
+
+      if (STREQ (ptr, "OFF")
+         || STREQ (ptr, "Off")
+         || STREQ (ptr, "off")
+         || STREQ (ptr, "0"))
+       {
+         opt = SQL_OPT_TRACE_OFF;
+       }
+
+      if (opt != (UDWORD) (-1L))
+       {
+         setopterr |= SQLSetConnectOption (hdbc,
+             SQL_OPT_TRACE, opt);
+       }
+    }
+
+  return setopterr;
 }
 
-RETCODE SQL_API SQLConnect (
-                        HDBC            hdbc,
-                        UCHAR FAR*      szDSN,
-                        SWORD           cbDSN,
-                        UCHAR FAR*      szUID,
-                        SWORD           cbUID,
-                        UCHAR FAR*      szAuthStr,
-                        SWORD           cbAuthStr)
+
+RETCODE SQL_API 
+SQLConnect (
+    HDBC hdbc,
+    UCHAR FAR * szDSN,
+    SWORD cbDSN,
+    UCHAR FAR * szUID,
+    SWORD cbUID,
+    UCHAR FAR * szAuthStr,
+    SWORD cbAuthStr)
 {
-        DBC_t  FAR*     pdbc    = (DBC_t FAR*)hdbc;
-        RETCODE         retcode = SQL_SUCCESS;
-        RETCODE         setopterr = SQL_SUCCESS;
-        char            driver[1024] = { '\0' }; /* MS SDK Guide
-                                                  * specifies driver
-                                                  * path can't longer
-                                                  * than 255. */
-        char            szNewDSN[256];                  /* OS/2 !!! */
-        char            *ptr;
-        HPROC           hproc;
-
-        if( hdbc == SQL_NULL_HDBC )
-        {
-                return SQL_INVALID_HANDLE;
-        }
-
-        /* check arguments */
-        if( ( cbDSN < 0 && cbDSN != SQL_NTS )
-         || ( cbUID < 0 && cbUID != SQL_NTS )
-         || ( cbAuthStr < 0 && cbAuthStr != SQL_NTS )
-         || ( cbDSN > SQL_MAX_DSN_LENGTH ) )
-        {
-                PUSHSQLERR ( pdbc->herr, en_S1090 );
-
-                return SQL_ERROR;
-        }
-
-        if( szDSN == NULL || cbDSN == 0 )
-        {
-                PUSHSQLERR ( pdbc->herr, en_IM002 );
-
-                return SQL_ERROR;
-        }
-
-        /* check state */
-        if( pdbc->state != en_dbc_allocated )
-        {
-                PUSHSQLERR ( pdbc->herr, en_08002 );
-
-                return SQL_ERROR;
-        }
-
-        setopterr |= _iodbcdm_settracing( hdbc,
-                                (char*)szDSN, cbDSN );
-
-        ptr = _iodbcdm_getkeyvalbydsn( szDSN, cbDSN, "Driver",
-                                (char FAR*)driver, sizeof(driver));
-
-        if( ptr == NULL )
-        /* No specified or default dsn section or
-         * no driver specification in this dsn section */
-        {
-                PUSHSQLERR ( pdbc->herr, en_IM002 );
-
-                return SQL_ERROR;
-        }
-
-        /*
-        ** OS/2 !!!
-        **
-        ** get new szDSN from INI file, if existing
+  DBC_t FAR *pdbc = (DBC_t FAR *) hdbc;
+  RETCODE retcode = SQL_SUCCESS;
+  RETCODE setopterr = SQL_SUCCESS;
+  char driver[1024] = {'\0'};  /* MS SDK Guide 
+                                * specifies driver
+                                * path can't longer
+                                * than 255. */
+  char *ptr;
+  HPROC hproc;
+
+  if (hdbc == SQL_NULL_HDBC)
+    {
+      return SQL_INVALID_HANDLE;
+    }
+
+  /* check arguments */
+  if ((cbDSN < 0 && cbDSN != SQL_NTS)
+      || (cbUID < 0 && cbUID != SQL_NTS)
+      || (cbAuthStr < 0 && cbAuthStr != SQL_NTS)
+      || (cbDSN > SQL_MAX_DSN_LENGTH))
+    {
+      PUSHSQLERR (pdbc->herr, en_S1090);
+
+      return SQL_ERROR;
+    }
+
+  if (szDSN == NULL || cbDSN == 0)
+    {
+      PUSHSQLERR (pdbc->herr, en_IM002);
+
+      return SQL_ERROR;
+    }
+
+  /* check state */
+  if (pdbc->state != en_dbc_allocated)
+    {
+      PUSHSQLERR (pdbc->herr, en_08002);
+
+      return SQL_ERROR;
+    }
+
+  setopterr |= _iodbcdm_settracing (hdbc,
+      (char *) szDSN, cbDSN);
+
+  ptr = _iodbcdm_getkeyvalbydsn (szDSN, cbDSN, "Driver",
+      (char FAR *) driver, sizeof (driver));
+
+  if (ptr == NULL)
+    /* No specified or default dsn section or
+     * no driver specification in this dsn section */
+    {
+      PUSHSQLERR (pdbc->herr, en_IM002);
+
+      return SQL_ERROR;
+    }
+
+  retcode = _iodbcdm_driverload (driver, hdbc);
+
+  switch (retcode)
+     {
+     case SQL_SUCCESS:
+       break;
+
+     case SQL_SUCCESS_WITH_INFO:
+       setopterr = SQL_ERROR;
+       /* unsuccessed in calling driver's 
+        * SQLSetConnectOption() to set login
+        * timeout.
         */
-        if( NULL != _iodbcdm_getkeyvalbydsn( szDSN, cbDSN, "DSN",
-                                             (char FAR*) &szNewDSN,
-                                             sizeof(szNewDSN) ) )
-        {
-                szDSN = &szNewDSN[0];
-                cbDSN = SQL_NTS;
-        }
-
-        retcode = _iodbcdm_driverload( driver, hdbc );
-
-        switch( retcode )
-        {
-                case SQL_SUCCESS:
-                        break;
-
-                case SQL_SUCCESS_WITH_INFO:
-                        setopterr = SQL_ERROR;
-                        /* unsuccessed in calling driver's
-                         * SQLSetConnectOption() to set login
-                         * timeout.
-                         */
-                        break;
-
-                default:
-                        return retcode;
-        }
-
-        hproc = _iodbcdm_getproc( hdbc, en_Connect );
-
-        if( hproc == SQL_NULL_HPROC )
-        {
-                _iodbcdm_driverunload( hdbc );
-
-                PUSHSQLERR ( pdbc->herr, en_IM001 );
-
-                return SQL_ERROR;
-        }
-
-        CALL_DRIVER ( hdbc, retcode, hproc, en_Connect, (
-                        pdbc->dhdbc,
-                        szDSN,     cbDSN,
-                        szUID,     cbUID,
-                        szAuthStr, cbAuthStr ) )
-
-#if 0
-        retcode = hproc(pdbc->dhdbc,
-                        szDSN,     cbDSN,
-                        szUID,     cbUID,
-                        szAuthStr, cbAuthStr );
-#endif
+       break;
+
+     default:
+       return retcode;
+     }
+
+  hproc = _iodbcdm_getproc (hdbc, en_Connect);
+
+  if (hproc == SQL_NULL_HPROC)
+    {
+      _iodbcdm_driverunload (hdbc);
 
-        if( retcode != SQL_SUCCESS
-         && retcode != SQL_SUCCESS_WITH_INFO )
-        {
-                /* not unload driver for retrive error
-                 * messge from driver */
-                /*********
-                _iodbcdm_driverunload( hdbc );
-                **********/
+      PUSHSQLERR (pdbc->herr, en_IM001);
 
-                return retcode;
-        }
+      return SQL_ERROR;
+    }
 
-        /* state transition */
-        pdbc->state = en_dbc_connected;
+  CALL_DRIVER (hdbc, retcode, hproc, en_Connect, (
+         pdbc->dhdbc,
+         szDSN, cbDSN,
+         szUID, cbUID,
+         szAuthStr, cbAuthStr))
 
-        /* do delaid option setting */
-        setopterr |= _iodbcdm_dbcdelayset( hdbc );
+  if (retcode != SQL_SUCCESS
+      && retcode != SQL_SUCCESS_WITH_INFO)
+    {
+      /* not unload driver for retrive error 
+       * messge from driver */
+               /*********
+               _iodbcdm_driverunload( hdbc );
+               **********/
 
-        if( setopterr != SQL_SUCCESS )
-        {
-                return SQL_SUCCESS_WITH_INFO;
-        }
+      return retcode;
+    }
 
-        return retcode;
+  /* state transition */
+  pdbc->state = en_dbc_connected;
+
+  /* do delaid option setting */
+  setopterr |= _iodbcdm_dbcdelayset (hdbc);
+
+  if (setopterr != SQL_SUCCESS)
+    {
+      return SQL_SUCCESS_WITH_INFO;
+    }
+
+  return retcode;
 }
 
-RETCODE SQL_API SQLDriverConnect (
-                        HDBC            hdbc,
-                        HWND            hwnd,
-                        UCHAR FAR*      szConnStrIn,
-                        SWORD           cbConnStrIn,
-                        UCHAR FAR*      szConnStrOut,
-                        SWORD           cbConnStrOutMax,
-                        SWORD FAR*      pcbConnStrOut,
-                        UWORD           fDriverCompletion )
+
+RETCODE SQL_API 
+SQLDriverConnect (
+    HDBC hdbc,
+    SQLHWND hwnd,
+    UCHAR FAR * szConnStrIn,
+    SWORD cbConnStrIn,
+    UCHAR FAR * szConnStrOut,
+    SWORD cbConnStrOutMax,
+    SWORD FAR * pcbConnStrOut,
+    UWORD fDriverCompletion)
 {
-        DBC_t FAR*      pdbc    = (DBC_t FAR*)hdbc;
-        HDLL            hdll;
-        char  FAR*      drv;
-        char            drvbuf[1024];
-        char  FAR*      dsn;
-        char            dsnbuf[SQL_MAX_DSN_LENGTH + 1];
-        char            szNewDSN[256];                    /* OS/2 !!! */
-        UCHAR           cnstr2drv[1024];
-
-        HPROC           hproc, dialproc;
-
-        int             sqlstat = en_00000;
-        RETCODE         retcode = SQL_SUCCESS;
-        RETCODE         setopterr = SQL_SUCCESS;
-
-        if( hdbc == SQL_NULL_HDBC )
-        {
-                return SQL_INVALID_HANDLE;
-        }
-
-        /* check arguments */
-        if( ( cbConnStrIn < 0 && cbConnStrIn != SQL_NTS )
-         || cbConnStrOutMax < 0 )
-        {
-                PUSHSQLERR (pdbc->herr, en_S1090 );
-
-                return SQL_ERROR;
-        }
-
-        /* check state */
-        if( pdbc->state != en_dbc_allocated )
-        {
-                PUSHSQLERR (pdbc->herr, en_08002 );
-
-                return SQL_ERROR;
-        }
-
-        drv = _iodbcdm_getkeyvalinstr(szConnStrIn, cbConnStrIn,
-                                "DRIVER", drvbuf, sizeof(drvbuf));
-
-        dsn = _iodbcdm_getkeyvalinstr(szConnStrIn, cbConnStrIn,
-                                "DSN",    dsnbuf, sizeof(dsnbuf));
-
-        switch( fDriverCompletion )
-        {
-                case SQL_DRIVER_NOPROMPT:
-                        break;
-
-                case SQL_DRIVER_COMPLETE:
-                case SQL_DRIVER_COMPLETE_REQUIRED:
-                        if( dsn != NULL )
-                        {
-                                break;
-                        }
-                        /* fall to next case */
-                case SQL_DRIVER_PROMPT:
-                        /* Get data source dialog box function from
-                         * current executable */
-                        hdll = _iodbcdm_dllopen((char FAR*)NULL);
-                        dialproc = _iodbcdm_dllproc( hdll,
-                                        "_iodbcdm_drvconn_dialbox");
-
-                        if( dialproc == SQL_NULL_HPROC )
-                        {
-                                sqlstat = en_IM008;
-                                break;
-                        }
-
-                        retcode = dialproc(
-                                        hwnd,   /* window or display handle */
-                                        dsnbuf, /* input/output dsn buf */
-                                        sizeof(dsnbuf), /* buf size */
-                                        &sqlstat);      /* error code */
-
-                        if( retcode != SQL_SUCCESS )
-                        {
-                                break;
-                        }
-
-                        if( cbConnStrIn == SQL_NTS )
-                        {
-                                cbConnStrIn = STRLEN(szConnStrIn );
-                        }
-
-                        dsn = dsnbuf;
-
-                        if( dsn[0] == '\0' )
-                        {
-                                dsn = "default";
-                        }
-
-                        if( cbConnStrIn > sizeof(cnstr2drv)
-                                        - STRLEN(dsn) - STRLEN("DSN=;") -1 )
-                        {
-                                sqlstat = en_S1001; /* a lazy way to avoid
-                                                     * using heap memory */
-                                break;
-                        }
-
-                        sprintf(cnstr2drv, "DSN=%s;", dsn);
-                        cbConnStrIn += STRLEN(cnstr2drv);
-                        STRNCAT( cnstr2drv, szConnStrIn, cbConnStrIn );
-                        szConnStrIn = cnstr2drv;
-                        break;
-
-                default:
-                        sqlstat = en_S1110;
-                        break;
-        }
-
-        if( sqlstat != en_00000 )
-        {
-                PUSHSQLERR( pdbc->herr, sqlstat );
-
-                return SQL_ERROR;
-        }
-
-        if( dsn == NULL || dsn[0] == '\0' )
-        {
-                dsn = "default";
-        }
-        else    /* if you want tracing, you must use a DSN */
-        {
-                setopterr |= _iodbcdm_settracing( hdbc,
-                                        (char*)dsn, SQL_NTS );
-        }
-
-        if( drv == NULL || drv[0] == '\0' )
-        {
-                drv = _iodbcdm_getkeyvalbydsn( dsn, SQL_NTS, "Driver",
-                                        drvbuf, sizeof(drvbuf));
-        }
-
-        if( drv == NULL )
-        {
-                PUSHSQLERR( pdbc->herr, en_IM002 );
-
-                return SQL_ERROR;
-        }
-
-        retcode = _iodbcdm_driverload( drv, hdbc );
-
-        switch( retcode )
-        {
-                case SQL_SUCCESS:
-                        break;
-
-                case SQL_SUCCESS_WITH_INFO:
-                        setopterr = SQL_ERROR;
-                        /* unsuccessed in calling driver's
-                         * SQLSetConnectOption() to set login
-                         * timeout.
-                         */
-                        break;
-
-                default:
-                        return retcode;
-        }
-
-        hproc = _iodbcdm_getproc( hdbc, en_DriverConnect );
-
-        if( hproc == SQL_NULL_HPROC )
-        {
-                _iodbcdm_driverunload( hdbc );
-
-                PUSHSQLERR ( pdbc->herr, en_IM001 );
-
-                return SQL_ERROR;
-        }
- /* giovanni */
-        /*
-        ** OS/2 !!!
-        **
-        ** get new szDSN from INI file, if existing
+  DBC_t FAR *pdbc = (DBC_t FAR *) hdbc;
+  HDLL hdll;
+  char FAR *drv;
+  char drvbuf[1024];
+  char FAR *dsn;
+  char dsnbuf[SQL_MAX_DSN_LENGTH + 1];
+  UCHAR cnstr2drv[1024];
+
+  HPROC hproc;
+  HPROC dialproc;
+
+  int sqlstat = en_00000;
+  RETCODE retcode = SQL_SUCCESS;
+  RETCODE setopterr = SQL_SUCCESS;
+
+  if (hdbc == SQL_NULL_HDBC)
+    {
+      return SQL_INVALID_HANDLE;
+    }
+
+  /* check arguments */
+  if ((cbConnStrIn < 0 && cbConnStrIn != SQL_NTS)
+      || cbConnStrOutMax < 0)
+    {
+      PUSHSQLERR (pdbc->herr, en_S1090);
+
+      return SQL_ERROR;
+    }
+
+  /* check state */
+  if (pdbc->state != en_dbc_allocated)
+    {
+      PUSHSQLERR (pdbc->herr, en_08002);
+
+      return SQL_ERROR;
+    }
+
+  drv = _iodbcdm_getkeyvalinstr (szConnStrIn, cbConnStrIn,
+      "DRIVER", drvbuf, sizeof (drvbuf));
+
+  dsn = _iodbcdm_getkeyvalinstr (szConnStrIn, cbConnStrIn,
+      "DSN", dsnbuf, sizeof (dsnbuf));
+
+  switch (fDriverCompletion)
+     {
+     case SQL_DRIVER_NOPROMPT:
+       break;
+
+     case SQL_DRIVER_COMPLETE:
+     case SQL_DRIVER_COMPLETE_REQUIRED:
+       if (dsn != NULL || drv != NULL)
+        {
+          break;
+        }
+       /* fall to next case */
+     case SQL_DRIVER_PROMPT:
+       /* Get data source dialog box function from
+        * current executable */
+       hdll = _iodbcdm_dllopen ((char FAR *) NULL);
+       dialproc = _iodbcdm_dllproc (hdll,
+          "_iodbcdm_drvconn_dialbox");
+
+       if (dialproc == SQL_NULL_HPROC)
+        {
+          sqlstat = en_IM008;
+          break;
+        }
+
+       retcode = dialproc (
+          hwnd,                /* window or display handle */
+          dsnbuf,              /* input/output dsn buf */
+          sizeof (dsnbuf),     /* buf size */
+          &sqlstat);           /* error code */
+
+       if (retcode != SQL_SUCCESS)
+        {
+          break;
+        }
+
+       if (cbConnStrIn == SQL_NTS)
+        {
+          cbConnStrIn = STRLEN (szConnStrIn);
+        }
+
+       dsn = dsnbuf;
+
+       if (dsn[0] == '\0')
+        {
+          dsn = "default";
+        }
+
+       if (cbConnStrIn > sizeof (cnstr2drv)
+          - STRLEN (dsn) - STRLEN ("DSN=;") - 1)
+        {
+          sqlstat = en_S1001;  /* a lazy way to avoid
+                                * using heap memory */
+          break;
+        }
+
+       sprintf ((char*)cnstr2drv, "DSN=%s;", dsn);
+       cbConnStrIn += STRLEN (cnstr2drv);
+       STRNCAT (cnstr2drv, szConnStrIn, cbConnStrIn);
+       szConnStrIn = cnstr2drv;
+       break;
+
+     default:
+       sqlstat = en_S1110;
+       break;
+     }
+
+  if (sqlstat != en_00000)
+    {
+      PUSHSQLERR (pdbc->herr, sqlstat);
+
+      return SQL_ERROR;
+    }
+
+  if (dsn == NULL || dsn[0] == '\0')
+    {
+      dsn = "default";
+    }
+  else
+    /* if you want tracing, you must use a DSN */
+    {
+      setopterr |= _iodbcdm_settracing (hdbc,
+         (char *) dsn, SQL_NTS);
+    }
+
+  if (drv == NULL || drv[0] == '\0')
+    {
+      drv = _iodbcdm_getkeyvalbydsn (dsn, SQL_NTS, "Driver",
+         drvbuf, sizeof (drvbuf));
+    }
+
+  if (drv == NULL)
+    {
+      PUSHSQLERR (pdbc->herr, en_IM002);
+
+      return SQL_ERROR;
+    }
+
+  retcode = _iodbcdm_driverload (drv, hdbc);
+
+  switch (retcode)
+     {
+     case SQL_SUCCESS:
+       break;
+
+     case SQL_SUCCESS_WITH_INFO:
+       setopterr = SQL_ERROR;
+       /* unsuccessed in calling driver's 
+        * SQLSetConnectOption() to set login
+        * timeout.
         */
-        strcpy( szNewDSN, "DSN=" );
-        if( NULL != _iodbcdm_getkeyvalbydsn( dsn, SQL_NTS, "DSN",
-                                             (char FAR*) &szNewDSN[4],
-                                             sizeof(szNewDSN) - 4 ) )
-        {
-                char   *psz;
+       break;
 
-                strcat( szNewDSN, ";UID=" );
-                psz = strtok( szNewDSN, "\0" );
+     default:
+       return retcode;
+     }
 
+  hproc = _iodbcdm_getproc (hdbc, en_DriverConnect);
 
+  if (hproc == SQL_NULL_HPROC)
+    {
+      _iodbcdm_driverunload (hdbc);
 
+      PUSHSQLERR (pdbc->herr, en_IM001);
 
-       if(NULL ==  _iodbcdm_getkeyvalinstr( szConnStrIn, cbConnStrIn,
-                                       /*
-                                         "UID", psz, sizeof(szNewDSN) ))
-                                        */
-                                         "UID", (char FAR*) &szNewDSN[strlen(psz)],
-                                         (sizeof(szNewDSN) - strlen(psz)) ) )
-               {
-                _iodbcdm_getkeyvalbydsn( dsn, SQL_NTS,
-                                         "UID", (char FAR*) &szNewDSN[strlen(psz)],
-                                         (sizeof(szNewDSN) - strlen(psz)) );
-               }
-                strcat( szNewDSN, ";PWD=" );
-                psz = strtok( szNewDSN, "\0" );
-       if(NULL ==  _iodbcdm_getkeyvalinstr( szConnStrIn, cbConnStrIn,
-                                        /*
-                                         "PWD", psz, sizeof(szNewDSN) ))
-                                        */
-                                         "PWD", (char FAR*) &szNewDSN[strlen(psz)],
-                                         (sizeof(szNewDSN) - strlen(psz)) ) )
-               {
+      return SQL_ERROR;
+    }
 
-                _iodbcdm_getkeyvalbydsn( dsn, SQL_NTS,
-                                         "PWD", (char FAR*) &szNewDSN[strlen(psz)],
-                                         (sizeof(szNewDSN) - strlen(psz)) );
-               }
-/*
-new from dirk
-       {
-                register char   *psz;
-
-                strcat( szNewDSN, ";UID=" );
-                psz = strtok( szNewDSN, "\0" );
-                _iodbcdm_getkeyvalinstr( szConnStrIn, cbConnStrIn,
-                                         "UID", psz, sizeof(szNewDSN) );
-                strcat( szNewDSN, ";PWD=" );
-                psz = strtok( szNewDSN, "\0" );
-                _iodbcdm_getkeyvalinstr( szConnStrIn, cbConnStrIn,
-                                         "PWD", psz, sizeof(szNewDSN) );
-                szConnStrIn = &szNewDSN[0];
-                cbConnStrIn = SQL_NTS;
-        }
-
-
-*/
-       /******** giovanni & monty ********/
-       /* Add a lot of optional keywords */
-       {
-         static char *keywords[]= { "SERVER","PORT","SOCKET","OPTION","DB",0 };
-         char buff[80],**key,*end;
-
-         psz= szNewDSN+strlen(szNewDSN);
-         end= szNewDSN+sizeof(szNewDSN);
-         for (key=keywords ; *key ; key++)
-         {
-           if (_iodbcdm_getkeyvalbydsn(dsn, SQL_NTS,
-                                       *key, (char FAR*) buff,
-                                       sizeof(buff)) &&
-               strlen(*key)+strlen(buff)+2 < (int) (end - psz))
-           {
-             *psz++=';';
-             strcpy(psz,*key); psz+=strlen(*key);
-             *psz++='=';
-             strcpy(psz,buff); psz+=strlen(buff);            
-           }
-         }
-       }
-       *psz=0;
-       /******** giovanni */
-       szConnStrIn = szNewDSN;  /*giovanni, era &szNewDSN */
-       cbConnStrIn = SQL_NTS;
-        }
- /* giovanni */
-        CALL_DRIVER ( hdbc, retcode, hproc, en_DriverConnect, (
-                        pdbc->dhdbc, hwnd,
-                        szConnStrIn, cbConnStrIn,
-                        szConnStrOut, cbConnStrOutMax,
-                        pcbConnStrOut, fDriverCompletion ) )
-#if 0
-        retcode = hproc(pdbc->dhdbc, hwnd,
-                        szConnStrIn, cbConnStrIn,
-                        szConnStrOut, cbConnStrOutMax,
-                        pcbConnStrOut, fDriverCompletion );
-#endif
+  CALL_DRIVER (hdbc, retcode, hproc, en_DriverConnect, (
+         pdbc->dhdbc, hwnd,
+         szConnStrIn, cbConnStrIn,
+         szConnStrOut, cbConnStrOutMax,
+         pcbConnStrOut, fDriverCompletion))
 
-        if( retcode != SQL_SUCCESS
-         && retcode != SQL_SUCCESS_WITH_INFO )
-        {
-                /* don't unload driver here for retrive
-                 * error message from driver */
-                /********
-                _iodbcdm_driverunload( hdbc );
-                *********/
+  if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO)
+    {
+      /* don't unload driver here for retrive 
+       * error message from driver */
+               /********
+               _iodbcdm_driverunload( hdbc );
+               *********/
 
-                return retcode;
-        }
+      return retcode;
+    }
 
-        /* state transition */
-        pdbc->state = en_dbc_connected;
+  /* state transition */
+  pdbc->state = en_dbc_connected;
 
-        /* do delaid option setting */
-        setopterr |= _iodbcdm_dbcdelayset( hdbc );
+  /* do delaid option setting */
+  setopterr |= _iodbcdm_dbcdelayset (hdbc);
 
-        if( setopterr != SQL_SUCCESS )
-        {
-                return SQL_SUCCESS_WITH_INFO;
-        }
+  if (setopterr != SQL_SUCCESS)
+    {
+      return SQL_SUCCESS_WITH_INFO;
+    }
 
-        return retcode;
+  return retcode;
 }
 
-RETCODE SQL_API SQLBrowseConnect (
-                        HDBC            hdbc,
-                        HWND            hwnd,
-                        UCHAR FAR*      szConnStrIn,
-                        SWORD           cbConnStrIn,
-                        UCHAR FAR*      szConnStrOut,
-                        SWORD           cbConnStrOutMax,
-                        SWORD FAR*      pcbConnStrOut )
+
+RETCODE SQL_API 
+SQLBrowseConnect (
+    HDBC hdbc,
+    UCHAR FAR * szConnStrIn,
+    SWORD cbConnStrIn,
+    UCHAR FAR * szConnStrOut,
+    SWORD cbConnStrOutMax,
+    SWORD FAR * pcbConnStrOut)
 {
-        DBC_t FAR*      pdbc    = (DBC_t FAR*)hdbc;
-        HDLL            hdll;
-        char  FAR*      drv;
-        char            drvbuf[1024];
-        char  FAR*      dsn;
-        char            dsnbuf[SQL_MAX_DSN_LENGTH + 1];
-        UCHAR           cnstr2drv[1024];
-
-        HPROC           hproc, dialproc;
-
-        int             sqlstat = en_00000;
-        RETCODE         retcode = SQL_SUCCESS;
-        RETCODE         setopterr = SQL_SUCCESS;
-
-        if( hdbc == SQL_NULL_HDBC )
-        {
-                return SQL_INVALID_HANDLE;
-        }
-
-        /* check arguments */
-        if( ( cbConnStrIn < 0 && cbConnStrIn != SQL_NTS )
-         || cbConnStrOutMax < 0 )
-        {
-                PUSHSQLERR (pdbc->herr, en_S1090 );
-
-                return SQL_ERROR;
-        }
-
-        if( pdbc->state == en_dbc_allocated )
-        {
-                drv = _iodbcdm_getkeyvalinstr(szConnStrIn, cbConnStrIn,
-                                "DRIVER", drvbuf, sizeof(drvbuf));
-
-                dsn = _iodbcdm_getkeyvalinstr(szConnStrIn, cbConnStrIn,
-                                "DSN",    dsnbuf, sizeof(dsnbuf));
-
-                if( dsn == NULL || dsn[0] == '\0' )
-                {
-                        dsn = "default";
-                }
-                else    /* if you want tracing, you must use a DSN */
-                {
-                        setopterr |= _iodbcdm_settracing( hdbc,
-                                                (char*)dsn, SQL_NTS );
-                }
-
-                if( drv == NULL || drv[0] == '\0' )
-                {
-                        drv = _iodbcdm_getkeyvalbydsn( dsn, SQL_NTS, "Driver",
-                                                drvbuf, sizeof(drvbuf));
-                }
-
-                if( drv == NULL )
-                {
-                        PUSHSQLERR( pdbc->herr, en_IM002 );
-
-                        return SQL_ERROR;
-                }
-
-                retcode = _iodbcdm_driverload( drv, hdbc );
-
-                switch( retcode )
-                {
-                        case SQL_SUCCESS:
-                                break;
-
-                        case SQL_SUCCESS_WITH_INFO:
-                                setopterr = SQL_ERROR;
-                                /* unsuccessed in calling driver's
-                                 * SQLSetConnectOption() to set login
-                                 * timeout.
-                                 */
-                                break;
-
-                        default:
-                                return retcode;
-                }
-        }
-        else if( pdbc->state != en_dbc_needdata )
-        {
-                PUSHSQLERR ( pdbc->herr, en_08002 );
-
-                return SQL_ERROR;
-        }
-
-        hproc = _iodbcdm_getproc( hdbc, en_BrowseConnect);
-
-        if( hproc == SQL_NULL_HPROC )
-        {
-                _iodbcdm_driverunload( hdbc );
-
-                pdbc->state = en_dbc_allocated;
-
-                PUSHSQLERR( pdbc->herr, en_IM001 );
-
-                return SQL_ERROR;
-        }
-
-        CALL_DRIVER ( hdbc, retcode, hproc, en_BrowseConnect, (
-                        pdbc->dhdbc, hwnd,
-                        szConnStrIn, cbConnStrIn,
-                        szConnStrOut, cbConnStrOutMax,
-                        pcbConnStrOut ) )
-
-#if 0
-        retcode = hproc(pdbc->dhdbc, hwnd,
-                        szConnStrIn, cbConnStrIn,
-                        szConnStrOut, cbConnStrOutMax,
-                        pcbConnStrOut );
-#endif
+  DBC_t FAR *pdbc = (DBC_t FAR *) hdbc;
+  char FAR *drv;
+  char drvbuf[1024];
+  char FAR *dsn;
+  char dsnbuf[SQL_MAX_DSN_LENGTH + 1];
 
-        switch( retcode )
-        {
-                case SQL_SUCCESS:
-                case SQL_SUCCESS_WITH_INFO:
-                        pdbc->state = en_dbc_connected;
-                        setopterr |= _iodbcdm_dbcdelayset( hdbc );
-                        if( setopterr != SQL_SUCCESS )
-                        {
-                                retcode = SQL_SUCCESS_WITH_INFO;
-                        }
-                        break;
-
-                case SQL_NEED_DATA:
-                        pdbc->state = en_dbc_needdata;
-                        break;
-
-                case SQL_ERROR:
-                        pdbc->state = en_dbc_allocated;
-                        /* but the driver will not unloaded
-                         * to allow application retrive err
-                         * message from driver
-                         */
-                        break;
-
-                default:
-                        break;
-        }
-
-        return retcode;
-}
+  HPROC hproc;
 
-RETCODE SQL_API SQLDisconnect ( HDBC hdbc )
-{
-        DBC_t   FAR*    pdbc    = (DBC_t*)hdbc;
-        STMT_t  FAR*    pstmt;
-        RETCODE         retcode;
-        HPROC           hproc;
-
-        int             sqlstat = en_00000;
-
-        if( hdbc == SQL_NULL_HDBC )
-        {
-                return SQL_INVALID_HANDLE;
-        }
-
-        /* check hdbc state */
-        if ( pdbc->state == en_dbc_allocated )
-        {
-                sqlstat = en_08003;
-        }
-
-        /* check stmt(s) state */
-        for( pstmt  = (STMT_t FAR*)pdbc->hstmt;
-             pstmt != NULL && sqlstat == en_00000;
-             pstmt  = (STMT_t FAR*)pstmt->next )
-        {
-                if( pstmt->state >= en_stmt_needdata
-                 || pstmt->asyn_on != en_NullProc )
-                /* In this case one need to call
-                 * SQLCancel() first */
-                {
-                        sqlstat = en_S1010;
-                }
-        }
-
-        if( sqlstat == en_00000 )
-        {
-                hproc = _iodbcdm_getproc( hdbc, en_Disconnect );
-
-                if( hproc == SQL_NULL_HPROC )
-                {
-                        sqlstat = en_IM001;
-                }
-        }
-
-        if( sqlstat != en_00000 )
-        {
-                PUSHSQLERR ( pdbc->herr, sqlstat );
-
-                return SQL_ERROR;
-        }
-
-        CALL_DRIVER ( hdbc, retcode, hproc, en_Disconnect, (
-                        pdbc->dhdbc ) )
-
-#if 0
-        retcode = hproc( pdbc->dhdbc );
-#endif
+  RETCODE retcode = SQL_SUCCESS;
+  RETCODE setopterr = SQL_SUCCESS;
 
-        if( retcode == SQL_SUCCESS
-         || retcode == SQL_SUCCESS_WITH_INFO )
-        {
-                /* diff from MS specs. We disallow
-                 * driver SQLDisconnect() return
-                 * SQL_SUCCESS_WITH_INFO and post
-                 * error message.
-                 */
-                retcode = SQL_SUCCESS;
-        }
-        else
-        {
-                return retcode;
-        }
-
-        /* free all statement handle(s) on this connection */
-        for(;pdbc->hstmt;)
-        {
-                _iodbcdm_dropstmt( pdbc->hstmt );
-        }
-
-#if 0
-        retcode = _iodbcdm_driverunload( hdbc );
-#endif
+  if (hdbc == SQL_NULL_HDBC)
+    {
+      return SQL_INVALID_HANDLE;
+    }
+
+  /* check arguments */
+  if ((cbConnStrIn < 0 && cbConnStrIn != SQL_NTS) || cbConnStrOutMax < 0)
+    {
+      PUSHSQLERR (pdbc->herr, en_S1090);
+
+      return SQL_ERROR;
+    }
+
+  if (pdbc->state == en_dbc_allocated)
+    {
+      drv = _iodbcdm_getkeyvalinstr (szConnStrIn, cbConnStrIn,
+         "DRIVER", drvbuf, sizeof (drvbuf));
+
+      dsn = _iodbcdm_getkeyvalinstr (szConnStrIn, cbConnStrIn,
+         "DSN", dsnbuf, sizeof (dsnbuf));
+
+      if (dsn == NULL || dsn[0] == '\0')
+       {
+         dsn = "default";
+       }
+      else
+       /* if you want tracing, you must use a DSN */
+       {
+         setopterr |= _iodbcdm_settracing (hdbc,
+             (char *) dsn, SQL_NTS);
+       }
+
+      if (drv == NULL || drv[0] == '\0')
+       {
+         drv = _iodbcdm_getkeyvalbydsn (dsn, SQL_NTS, "Driver",
+             drvbuf, sizeof (drvbuf));
+       }
+
+      if (drv == NULL)
+       {
+         PUSHSQLERR (pdbc->herr, en_IM002);
+
+         return SQL_ERROR;
+       }
+
+      retcode = _iodbcdm_driverload (drv, hdbc);
+
+      switch (retcode)
+        {
+        case SQL_SUCCESS:
+          break;
+
+        case SQL_SUCCESS_WITH_INFO:
+          setopterr = SQL_ERROR;
+          /* unsuccessed in calling driver's 
+           * SQLSetConnectOption() to set login
+           * timeout.
+           */
+          break;
+
+        default:
+          return retcode;
+        }
+    }
+  else if (pdbc->state != en_dbc_needdata)
+    {
+      PUSHSQLERR (pdbc->herr, en_08002);
+
+      return SQL_ERROR;
+    }
+
+  hproc = _iodbcdm_getproc (hdbc, en_BrowseConnect);
+
+  if (hproc == SQL_NULL_HPROC)
+    {
+      _iodbcdm_driverunload (hdbc);
+
+      pdbc->state = en_dbc_allocated;
+
+      PUSHSQLERR (pdbc->herr, en_IM001);
+
+      return SQL_ERROR;
+    }
+
+  CALL_DRIVER (hdbc, retcode, hproc, en_BrowseConnect, (
+         pdbc->dhdbc, 
+         szConnStrIn, cbConnStrIn, 
+         szConnStrOut, cbConnStrOutMax,
+         pcbConnStrOut))
+
+  switch (retcode)
+     {
+     case SQL_SUCCESS:
+     case SQL_SUCCESS_WITH_INFO:
+       pdbc->state = en_dbc_connected;
+       setopterr |= _iodbcdm_dbcdelayset (hdbc);
+       if (setopterr != SQL_SUCCESS)
+        {
+          retcode = SQL_SUCCESS_WITH_INFO;
+        }
+       break;
+
+     case SQL_NEED_DATA:
+       pdbc->state = en_dbc_needdata;
+       break;
+
+     case SQL_ERROR:
+       pdbc->state = en_dbc_allocated;
+       /* but the driver will not unloaded 
+        * to allow application retrive err
+        * message from driver 
+        */
+       break;
 
-        /* state transition */
-        if( retcode == SQL_SUCCESS )
-        {
-                pdbc->state = en_dbc_allocated;
-        }
+     default:
+       break;
+     }
 
-        return retcode;
+  return retcode;
 }
 
-RETCODE SQL_API SQLNativeSql(
-                        HDBC            hdbc,
-                        UCHAR  FAR*     szSqlStrIn,
-                        SDWORD          cbSqlStrIn,
-                        UCHAR  FAR*     szSqlStr,
-                        SDWORD          cbSqlStrMax,
-                        SDWORD FAR*     pcbSqlStr )
+
+RETCODE SQL_API 
+SQLDisconnect (HDBC hdbc)
 {
-        DBC_t FAR*      pdbc    = (DBC_t FAR*)hdbc;
-        HPROC           hproc;
-        int             sqlstat = en_00000;
-        RETCODE         retcode;
-
-        if( hdbc == SQL_NULL_HDBC )
-        {
-                return SQL_INVALID_HANDLE;
-        }
-
-        /* check argument */
-        if( szSqlStrIn == NULL )
-        {
-                sqlstat = en_S1009;
-        }
-        else if( cbSqlStrIn < 0
-              && cbSqlStrIn != SQL_NTS )
-        {
-                sqlstat = en_S1090;
-        }
-
-        if( sqlstat != en_00000 )
-        {
-                PUSHSQLERR ( pdbc->herr, sqlstat );
-
-                return SQL_ERROR;
-        }
-
-        /* check state */
-        if( pdbc->state <= en_dbc_needdata )
-        {
-                PUSHSQLERR ( pdbc->herr, en_08003 );
-
-                return SQL_ERROR;
-        }
-
-        /* call driver */
-        hproc = _iodbcdm_getproc( hdbc, en_NativeSql );
-
-        if( hproc == SQL_NULL_HPROC )
-        {
-                PUSHSQLERR ( pdbc->herr, en_IM001 );
-
-                return SQL_ERROR;
-        }
-
-        CALL_DRIVER ( hdbc, retcode, hproc, en_NativeSql, (
-                        pdbc->dhdbc,
-                        szSqlStrIn,
-                        cbSqlStrIn,
-                        szSqlStr,
-                        cbSqlStrMax,
-                        pcbSqlStr ) )
-
-#if 0
-        retcode = hproc(pdbc->dhdbc,
-                        szSqlStrIn,
-                        cbSqlStrIn,
-                        szSqlStr,
-                        cbSqlStrMax,
-                        pcbSqlStr );
-#endif
+  DBC_t FAR *pdbc = (DBC_t *) hdbc;
+  STMT_t FAR *pstmt;
+  RETCODE retcode;
+  HPROC hproc;
+
+  int sqlstat = en_00000;
+
+  if (hdbc == SQL_NULL_HDBC)
+    {
+      return SQL_INVALID_HANDLE;
+    }
+
+  /* check hdbc state */
+  if (pdbc->state == en_dbc_allocated)
+    {
+      sqlstat = en_08003;
+    }
+
+  /* check stmt(s) state */
+  for (pstmt = (STMT_t FAR *) pdbc->hstmt;
+      pstmt != NULL && sqlstat == en_00000;
+      pstmt = (STMT_t FAR *) pstmt->next)
+    {
+      if (pstmt->state >= en_stmt_needdata
+         || pstmt->asyn_on != en_NullProc)
+       /* In this case one need to call 
+        * SQLCancel() first */
+       {
+         sqlstat = en_S1010;
+       }
+    }
+
+  if (sqlstat == en_00000)
+    {
+      hproc = _iodbcdm_getproc (hdbc, en_Disconnect);
 
-        return retcode;
+      if (hproc == SQL_NULL_HPROC)
+       {
+         sqlstat = en_IM001;
+       }
+    }
+
+  if (sqlstat != en_00000)
+    {
+      PUSHSQLERR (pdbc->herr, sqlstat);
+
+      return SQL_ERROR;
+    }
+
+  CALL_DRIVER (hdbc, retcode, hproc, en_Disconnect, (
+         pdbc->dhdbc))
+
+  if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO)
+    {
+      /* diff from MS specs. We disallow
+       * driver SQLDisconnect() return
+       * SQL_SUCCESS_WITH_INFO and post
+       * error message.
+       */
+      retcode = SQL_SUCCESS;
+    }
+  else
+    {
+      return retcode;
+    }
+
+  /* free all statement handle(s) on this connection */
+  for (; pdbc->hstmt;)
+    {
+      _iodbcdm_dropstmt (pdbc->hstmt);
+    }
+
+  /* state transition */
+  if (retcode == SQL_SUCCESS)
+    {
+      pdbc->state = en_dbc_allocated;
+    }
+
+  return retcode;
+}
+
+
+RETCODE SQL_API 
+SQLNativeSql (
+    HDBC hdbc,
+    UCHAR FAR * szSqlStrIn,
+    SDWORD cbSqlStrIn,
+    UCHAR FAR * szSqlStr,
+    SDWORD cbSqlStrMax,
+    SDWORD FAR * pcbSqlStr)
+{
+  DBC_t FAR *pdbc = (DBC_t FAR *) hdbc;
+  HPROC hproc;
+  int sqlstat = en_00000;
+  RETCODE retcode;
+
+  if (hdbc == SQL_NULL_HDBC)
+    {
+      return SQL_INVALID_HANDLE;
+    }
+
+  /* check argument */
+  if (szSqlStrIn == NULL)
+    {
+      sqlstat = en_S1009;
+    }
+  else if (cbSqlStrIn < 0 && cbSqlStrIn != SQL_NTS)
+    {
+      sqlstat = en_S1090;
+    }
+
+  if (sqlstat != en_00000)
+    {
+      PUSHSQLERR (pdbc->herr, sqlstat);
+
+      return SQL_ERROR;
+    }
+
+  /* check state */
+  if (pdbc->state <= en_dbc_needdata)
+    {
+      PUSHSQLERR (pdbc->herr, en_08003);
+
+      return SQL_ERROR;
+    }
+
+  /* call driver */
+  hproc = _iodbcdm_getproc (hdbc, en_NativeSql);
+
+  if (hproc == SQL_NULL_HPROC)
+    {
+      PUSHSQLERR (pdbc->herr, en_IM001);
+
+      return SQL_ERROR;
+    }
+
+  CALL_DRIVER (hdbc, retcode, hproc, en_NativeSql,
+    (pdbc->dhdbc, szSqlStrIn, cbSqlStrIn, szSqlStr, cbSqlStrMax, pcbSqlStr))
+
+  return retcode;
 }