sqlgettranslator.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 191 行

/*
 *  SQLGetTranslator.c
 *
 *  $Id: SQLGetTranslator.c,v 1.1 2001/06/07 00:48:50 source Exp $
 *
 *  These functions intentionally left blank
 *
 *  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 "dlf.h"
#include "inifile.h"
#include "misc.h"
#include "iodbc_error.h"

#ifndef WIN32
#include <unistd.h>
#define CALL_CONFIG_TRANSLATOR(path) \
	if ((handle = DLL_OPEN(path)) != NULL) \
	{ \
		if ((pConfigTranslator = (pConfigTranslatorFunc)DLL_PROC(handle, "ConfigTranslator")) != NULL) \
		{ \
	  	if (pConfigTranslator(hwndParent, pvOption)) \
	  	{ \
	    	DLL_CLOSE(handle); \
	    	finish = retcode = TRUE; \
	    	goto done; \
	  	} \
			else \
			{ \
				PUSH_ERROR(ODBC_ERROR_GENERAL_ERR); \
	    	DLL_CLOSE(handle); \
	    	retcode = FALSE; \
	    	goto done; \
			} \
		} \
		DLL_CLOSE(handle); \
	}
#endif

extern SQLRETURN _iodbcdm_trschoose_dialbox(HWND, LPSTR, DWORD, int FAR*);

BOOL INSTAPI GetTranslator (HWND hwndParent, LPSTR lpszName, WORD cbNameMax,
    WORD FAR *pcbNameOut, LPSTR lpszPath, WORD cbPathMax,
    WORD FAR *pcbPathOut, DWORD FAR *pvOption)
{
  pConfigTranslatorFunc pConfigTranslator;
  BOOL retcode = FALSE, finish = FALSE;
  PCONFIG pCfg;
  UWORD configMode;
  RETCODE ret;
  void *handle;
  char translator[1024];

  do
    {
      ret =
	  _iodbcdm_trschoose_dialbox (hwndParent, translator,
	  sizeof (translator), NULL);

      if (ret == SQL_NO_DATA)
	{
	  if (pcbNameOut)
	    *pcbNameOut = 0;
	  if (pcbPathOut)
	    *pcbPathOut = 0;
	  finish = TRUE;
	}

      if (ret == SQL_SUCCESS)
	{
	  STRNCPY (lpszName, translator + STRLEN ("TranslationName="),
	      cbNameMax - 1);
	  if (pcbNameOut)
	    *pcbNameOut = STRLEN (lpszName);

	  /* Get it from the user odbcinst file */
	  wSystemDSN = USERDSN_ONLY;
	  if (!_iodbcdm_cfg_search_init (&pCfg, "odbcinst.ini", TRUE))
	    {
	      if (!_iodbcdm_cfg_find (pCfg, (char *) lpszName, "Setup"))
		CALL_CONFIG_TRANSLATOR (pCfg->value);
	      if (!_iodbcdm_cfg_find (pCfg, (char *) lpszName, "Translator"))
		CALL_CONFIG_TRANSLATOR (pCfg->value);
	      if (!access (lpszName, X_OK))
		CALL_CONFIG_TRANSLATOR (lpszName);
	      if (!_iodbcdm_cfg_find (pCfg, "Default", "Setup"))
		CALL_CONFIG_TRANSLATOR (pCfg->value);
	      if (!_iodbcdm_cfg_find (pCfg, "Default", "Translator"))
		CALL_CONFIG_TRANSLATOR (pCfg->value);
	    }

	  /* Get it from the system odbcinst file */
	  if (pCfg)
	    {
	      _iodbcdm_cfg_done (pCfg);
	      pCfg = NULL;
	    }
	  wSystemDSN = SYSTEMDSN_ONLY;
	  if (!_iodbcdm_cfg_search_init (&pCfg, "odbcinst.ini", TRUE))
	    {
	      if (!_iodbcdm_cfg_find (pCfg, (char *) lpszName, "Setup"))
		CALL_CONFIG_TRANSLATOR (pCfg->value);
	      if (!_iodbcdm_cfg_find (pCfg, (char *) lpszName, "Translator"))
		CALL_CONFIG_TRANSLATOR (pCfg->value);
	      if (!access (lpszName, X_OK))
		CALL_CONFIG_TRANSLATOR (lpszName);
	      if (!_iodbcdm_cfg_find (pCfg, "Default", "Setup"))
		CALL_CONFIG_TRANSLATOR (pCfg->value);
	      if (!_iodbcdm_cfg_find (pCfg, "Default", "Translator"))
		CALL_CONFIG_TRANSLATOR (pCfg->value);
	    }

	  /* The last ressort, a proxy driver */
	  CALL_CONFIG_TRANSLATOR ("libtranslator.so");

	  /* Error : ConfigDSN could no be found */
	  PUSH_ERROR (ODBC_ERROR_LOAD_LIB_FAILED);

	done:
	  STRNCPY (lpszPath, pCfg->fileName, cbPathMax - 1);
	  if (pcbPathOut)
	    *pcbPathOut = STRLEN (lpszPath);
	  _iodbcdm_cfg_done (pCfg);
	}
    }
  while (!finish);

  retcode = TRUE;

quit:
  wSystemDSN = USERDSN_ONLY;
  configMode = ODBC_BOTH_DSN;

  return retcode;
}


BOOL INSTAPI
SQLGetTranslator (
    HWND hwnd,
    LPSTR lpszName,
    WORD cbNameMax,
    WORD FAR * pcbNameOut,
    LPSTR lpszPath,
    WORD cbPathMax,
    WORD FAR * pcbPathOut,
    DWORD FAR * pvOption)
{
  BOOL retcode = FALSE;

  /* Check input parameters */
  CLEAR_ERROR ();
  if (!hwnd)
    {
      PUSH_ERROR (ODBC_ERROR_INVALID_HWND);
      goto quit;
    }

  if (!lpszName || !lpszPath || cbNameMax < 1 || cbPathMax < 1)
    {
      PUSH_ERROR (ODBC_ERROR_INVALID_BUFF_LEN);
      goto quit;
    }

  retcode = GetTranslator (hwnd, lpszName, cbNameMax, pcbNameOut, lpszPath,
      cbPathMax, pcbPathOut, pvOption);

quit:
  return retcode;
}