CDE/cde/lib/tt/mini_isam/isfab.c

/*
 * CDE - Common Desktop Environment
 *
 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
 *
 * These libraries and programs are free software; you can
 * redistribute them and/or modify them under the terms of the GNU
 * Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * These libraries and programs are distributed in the hope that
 * they will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with these libraries and programs; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301 USA
 */
/*%%  (c) Copyright 1993, 1994 Hewlett-Packard Company			 */
/*%%  (c) Copyright 1993, 1994 International Business Machines Corp.	 */
/*%%  (c) Copyright 1993, 1994 Sun Microsystems, Inc.			 */
/*%%  (c) Copyright 1993, 1994 Novell, Inc. 				 */
/*%%  $XConsortium: isfab.c /main/3 1995/10/23 11:38:24 rswiston $ 			 				 */
/*
 * Copyright (c) 1988 by Sun Microsystems, Inc.
 */

/*
 * isfab.c
 *
 * Description:
 *	The ISAM file access block functions.
 *
 */
#include <stdlib.h>

#include "isam_impl.h"


/*
 * fab = *fab_new(isfname, mode, varlen, minreclen, maxreclen)
 *
 * Fab_new() creates an File access block (fab object) that is used
 * for all subsequent operations in this file. Return a pointer to 
 * the fab object, or NULL in the case of an error.
 
 * isfname, Local path on the host 
 * varlen, 0/1 flag
 */

Fab *
_fab_new(char *isfname, enum openmode openmode, Bool varlen, int minreclen, int maxreclen)
{
    Fab	*fab;

    /* Allocate memory for the fab object. */
    fab = (Fab *) _ismalloc(sizeof(*fab));
    memset((char *)fab, 0, sizeof(*fab));

    if (fab == NULL) {
      iserrno = EFATAL;
      return (NULL);
    }

    /* Set fields in the fab objects. */
    fab->openmode = openmode;
    fab->varlength = varlen;
    fab->minreclen = minreclen;
    fab->maxreclen = maxreclen;
    fab->isfname = _isallocstring(isfname);

    if (fab->isfname == NULL) {
      free((char *)fab);
      iserrno = EFATAL;
      return (NULL);
    }

    return (fab);
}

void
_fab_destroy(Fab *fab)
{
    assert(fab != NULL);
    assert(fab->isfname != NULL);

    _isfreestring(fab->isfname);

    _bytearr_free(&fab->isfhandle);
    _bytearr_free(&fab->curpos);

    free((char *)fab);
}