sqlremovedriver.c

来自「一个可以替代windows ODBC驱动程序管理器的通用ODBC数据库引擎」· C语言 代码 · 共 180 行

/*
 *  SQLRemoveDriver.c
 *
 *  $Id: SQLRemoveDriver.c,v 1.1 2001/06/07 00:48:50 source Exp $
 *
 *  Remove a driver
 *
 *  The iODBC driver manager.
 *
 *  Copyright (C) 2001 by OpenLink Software <[e-mail]>
 *
 *  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.h>
#include <iodbcinst.h>

#include "inifile.h"
#include "misc.h"
#include "iodbc_error.h"


BOOL INSTAPI
SQLRemoveDriver (LPCSTR lpszDriver, BOOL fRemoveDSN, LPDWORD lpdwUsageCount)
{
  /*char *szDriverFile = NULL; */
  BOOL retcode = FALSE;
  PCONFIG pCfg = NULL, pInstCfg = NULL;
  LPSTR entries = (LPSTR) malloc (sizeof (char) * 65535), curr;
  int len = 0, i = 0;

  /* Check input parameters */
  CLEAR_ERROR ();
  if (!lpszDriver || !STRLEN (lpszDriver))
    {
      PUSH_ERROR (ODBC_ERROR_INVALID_NAME);
      goto quit;
    }

  /* Else go through user/system odbcinst.ini */
  switch (configMode)
    {
    case ODBC_BOTH_DSN:
    case ODBC_USER_DSN:
      wSystemDSN = USERDSN_ONLY;
      break;

    case ODBC_SYSTEM_DSN:
      wSystemDSN = SYSTEMDSN_ONLY;
      break;
    };

  if (_iodbcdm_cfg_search_init (&pCfg, "odbc.ini", FALSE))
    {
      PUSH_ERROR (ODBC_ERROR_GENERAL_ERR);
      goto done;
    }

  if (_iodbcdm_cfg_search_init (&pInstCfg, "odbcinst.ini", FALSE))
    {
      PUSH_ERROR (ODBC_ERROR_GENERAL_ERR);
      goto done;
    }

  if (fRemoveDSN)
    {
#ifdef WIN32
      if (entries &&
	(len = _iodbcdm_list_entries (pCfg, "ODBC 32 bit Data Sources",
		  entries, 65535)))
#else
      if (entries
	  && (len =
	      _iodbcdm_list_entries (pCfg, "ODBC Data Sources", entries,
		  65535)))
#endif
	{
	  for (curr = entries; i < len;
	      i += (STRLEN (curr) + 1), curr += (STRLEN (curr) + 1))
	    {
	      int nCursor = pCfg->cursor;

	      if (_iodbcdm_cfg_rewind (pCfg))
		{
		  PUSH_ERROR (ODBC_ERROR_GENERAL_ERR);
		  goto done;
		}

#ifdef WIN32
	      if (_iodbcdm_cfg_find (pCfg, "ODBC 32 bit Data Sources", curr))
#else
	      if (_iodbcdm_cfg_find (pCfg, "ODBC Data Sources", curr))
#endif
		{
		  if (_iodbcdm_cfg_rewind (pCfg))
		    {
		      PUSH_ERROR (ODBC_ERROR_GENERAL_ERR);
		      goto done;
		    }
		  pCfg->cursor = nCursor;
		  continue;
		}

	      if (!strcmp (pCfg->value, lpszDriver))
		{
		  if (_iodbcdm_cfg_write (pCfg, curr, NULL, NULL))
		    {
		      PUSH_ERROR (ODBC_ERROR_GENERAL_ERR);
		      goto done;
		    }

#ifdef WIN32
		  if (_iodbcdm_cfg_write (pCfg, "ODBC 32 bit Data Sources",
			  curr, NULL))
#else
		  if (_iodbcdm_cfg_write (pCfg, "ODBC Data Sources", curr,
			  NULL))
#endif
		    {
		      PUSH_ERROR (ODBC_ERROR_GENERAL_ERR);
		      goto done;
		    }
		}

	      pCfg->cursor = nCursor;
	    }
	}
    }

  if (_iodbcdm_cfg_write (pInstCfg, (char *) lpszDriver, NULL, NULL))
    {
      PUSH_ERROR (ODBC_ERROR_GENERAL_ERR);
      goto done;
    }

#ifdef WIN32
  if (_iodbcdm_cfg_write (pInstCfg, "ODBC 32 bit Drivers", lpszDriver, NULL))
#else
  if (_iodbcdm_cfg_write (pInstCfg, "ODBC Drivers", (LPSTR) lpszDriver, NULL))
#endif
    {
      PUSH_ERROR (ODBC_ERROR_GENERAL_ERR);
      goto done;
    }

  if (_iodbcdm_cfg_commit (pCfg) || _iodbcdm_cfg_commit (pInstCfg))
    {
      PUSH_ERROR (ODBC_ERROR_GENERAL_ERR);
      goto done;
    }

  retcode = TRUE;

done:
  if (pCfg)
    _iodbcdm_cfg_done (pCfg);
  if (pInstCfg)
    _iodbcdm_cfg_done (pInstCfg);
  if (entries)
    free (entries);

quit:
  wSystemDSN = USERDSN_ONLY;
  configMode = ODBC_BOTH_DSN;

  return retcode;
}