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: isrewcurr.c /main/3 1995/10/23 11:44:15 rswiston $ */
29 static char sccsid[] = "@(#)isrewcurr.c 1.8 89/07/17 Copyr 1988 Sun Micro";
32 * Copyright (c) 1988 by Sun Microsystems, Inc.
39 * Rewrite current record in ISAM file.
43 #include "isam_impl.h"
46 static int _amrewcurr(), _changekeys2();
49 * err = isrewcurr(isfd, record)
51 * Isrewcurr() modifies the current record in ISAM file.
52 * All indexes of the ISAM file are updated.
54 * Current record position is changed in relation to the new key value.
55 * isrecnum is set to the changed record.
57 * If the ISAM file is for variable length records, the isreclen variable
58 * must be set to indicate the actual length of the record, which must
59 * be between the minimum and maximum length, as specified in isbuild().
61 * Returns 0 if successful, or -1 of any error.
64 * EDUPL The write woul result in a duplicate on a key that
65 * does not allow duplicates.
66 * ELOCKED The file has been locked by another process.
67 * ENOTOPEN isfd does not correspond to an open ISAM file, or the
68 * ISAM file was not opened with ISINOUT mode.
69 * ENOCURR Record with record number recnum does not exist, or it
70 * was deleted by another process.
74 isrewcurr(isfd, record)
84 * Get File Access Block.
86 if ((fab = _isfd_find(isfd)) == NULL) {
87 _setiserrno2(ENOTOPEN, '9', '0');
92 * Check that the open mode was ISINOUT.
94 if (fab->openmode != OM_INOUT) {
95 _setiserrno2(ENOTOPEN, '9', '0');
100 * Determine record length. Check it against min and max record length.
102 reclen = (fab->varlength == TRUE) ? isreclen : fab->minreclen;
103 if (reclen < fab->minreclen || reclen > fab->maxreclen) {
104 _setiserrno2(EBADARG, '9', '0');
108 if ((ret = _amrewcurr(&fab->isfhandle, record, reclen, &fab->curpos,
109 &recnum, &fab->errcode)) == ISOK) {
110 isrecnum = recnum; /* Set isrecnum */
113 _seterr_errcode(&fab->errcode);
115 return (ret); /* Successful write */
119 * _amrewcurr(isfhandle, record, reclen, curpos, recnum, errcode)
121 * _amrewcurr() rewrites the current record in ISAM file.
124 * isfhandle Handle of ISAM file
126 * reclen length of the record
127 * curpos curent record position
130 * errcode error status of the operation
131 * curpos new current position
132 * recnum record number fo current record
137 _amrewcurr(isfhandle, record, reclen, curpos, recnum, errcode)
138 Bytearray *isfhandle;
143 struct errcode *errcode;
149 char oldrecord[ISMAXRECLEN];
152 int (*rec_rewrite)();
157 * Get FCB corresponding to the isfhandle handle.
159 if ((fcb = _openfcb(isfhandle, errcode)) == NULL) {
164 rec_read = (fcb->varflag?_vlrec_read:_flrec_read);
165 rec_rewrite = (fcb->varflag?_vlrec_rewrite:_flrec_rewrite);
168 * Get info from current record position structure.
170 crp = (Crp *) curpos->data;
173 if (crp->flag != CRP_ON) {
174 _amseterrcode(errcode, ENOCURR);
179 * Update information in FCB from CNTL page on the disk
181 (void)_isfcb_cntlpg_r2(fcb);
184 * We must read the record first to be able to delete keys.
186 if (rec_read(fcb, oldrecord, crp->recno, &reclen2) != ISOK) {
187 _amseterrcode(errcode, ENOCURR);
191 if (rec_rewrite(fcb, record, crp->recno, reclen) != ISOK) {
192 _amseterrcode(errcode, ENOCURR);
197 * Update keys, set new key position.
199 newcurpos = _bytearr_dup(curpos);
200 if ((err = _changekeys2 (fcb, record, oldrecord, crp->recno, &newcurpos))
202 _bytearr_free(&newcurpos);
203 _amseterrcode(errcode, err);
208 * This takes care of new record position if the physical order is in use.
210 *recnum = crp->recno;
212 _bytearr_free(curpos);
213 crp = NULL; /* was aliased to freed curpos->data */
216 _amseterrcode(errcode, ISOK);
223 * Update control page.
225 (void)_isfcb_cntlpg_w2(fcb);
236 * Restore FCB from CNTL page.
238 (void)_isfcb_cntlpg_r2(fcb);
245 _changekeys2(fcb, record, oldrecord, recnum, curpos)
252 int nkeys = fcb->nkeys;
259 crp = (Crp *)curpos->data;
262 for (i = 0; i < nkeys; i++) {
263 keydesc2 = fcb->keys + i;
264 if ((err =_change1key(fcb, keydesc2, record, oldrecord, recnum,
265 (keydesc2->k2_keyid == keyid) ?
266 crp->key : (char *) NULL)) != ISOK)