henv.c

来自「A*算法 A*算法 A*算法 A*算法A*算法A*算法」· C语言 代码 · 共 90 行

/*
 *  henv.c
 *
 *  $Id: henv.c,v 1.4 1999/06/01 15:31:41 VZ Exp $
 *
 *  Environment object management functions
 *
 *  The iODBC driver manager.
 *  
 *  Copyright (C) 1995 by Ke Jin <[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	"config.h"

#include	"isql.h"
#include	"isqlext.h"

#include	"dlproc.h"

#include	"herr.h"
#include	"henv.h"

#include	"itrace.h"

RETCODE SQL_API 
SQLAllocEnv (HENV FAR * phenv)
{
  GENV_t FAR *genv;

  genv = (GENV_t *) MEM_ALLOC (sizeof (GENV_t));

  if (genv == NULL)
    {
      *phenv = SQL_NULL_HENV;

      return SQL_ERROR;
    }

#if (ODBCVER >= 0x0300 )
  genv->type = SQL_HANDLE_ENV;
#endif

  genv->henv = SQL_NULL_HENV;	/* driver's env list */
  genv->hdbc = SQL_NULL_HDBC;	/* driver's dbc list */
  genv->herr = SQL_NULL_HERR;	/* err list          */

  *phenv = (HENV) genv;

  return SQL_SUCCESS;
}


RETCODE SQL_API 
SQLFreeEnv (HENV henv)
{
  GENV_t FAR *genv = (GENV_t *) henv;

  if (henv == SQL_NULL_HENV)
    {
      return SQL_INVALID_HANDLE;
    }

  if (genv->hdbc != SQL_NULL_HDBC)
    {
      PUSHSQLERR (genv->herr, en_S1010);

      return SQL_ERROR;
    }

  _iodbcdm_freesqlerrlist (genv->herr);

  MEM_FREE (henv);

  return SQL_SUCCESS;
}