2 * CDE - Common Desktop Environment
4 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
6 * These libraries and programs are free software; you can
7 * redistribute them and/or modify them under the terms of the GNU
8 * Lesser General Public License as published by the Free Software
9 * Foundation; either version 2 of the License, or (at your option)
12 * These libraries and programs are distributed in the hope that
13 * they will be useful, but WITHOUT ANY WARRANTY; without even the
14 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU Lesser General Public License for more
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with these libraries and programs; if not, write
20 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
21 * Floor, Boston, MA 02110-1301 USA
23 /*%% (c) Copyright 1993, 1994 Hewlett-Packard Company */
24 /*%% (c) Copyright 1993, 1994 International Business Machines Corp. */
25 /*%% (c) Copyright 1993, 1994 Sun Microsystems, Inc. */
26 /*%% (c) Copyright 1993, 1994 Novell, Inc. */
27 /*%% $XConsortium: isfd.c /main/3 1995/10/23 11:39:10 rswiston $ */
29 * Copyright (c) 1988 by Sun Microsystems, Inc.
36 * The ISAM file descriptors (isfd) are used as index to a table of
37 * pointers to File Access Block objects. Isfd.c maintains the table
38 * of the pointers (isfdtab).
42 #include "isam_impl.h"
44 static Fab *isfdtab[MAXISFD]; /* Table of pointers */
50 * Insert a pointer to an Fab object to table of ISAM file descriptors.
51 * Return an ISAM file descriptor, or NOISFD if the table is full.
55 _isfd_insert(Fab *fab)
59 for (i = 0; i < MAXISFD; i++) {
60 if (isfdtab[i] == NULL) /* Empty entry found */
65 return (NOISFD); /* isfdtab is full */
75 * Return a pointer to Fab object associated with the ISAM file
76 * descriptor isfd. If isfd is not a file descriptor of an open ISAM file,
83 if (isfd < 0 || isfd >= MAXISFD || isfdtab[isfd] == NULL)
86 return (isfdtab[isfd]);
92 * Delete an entry from isfdtab. No check is made the entry exists.
96 _isfd_delete(Isfd isfd)
98 if (isfd >= 0 && isfd < MAXISFD)