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(int isfd, char *record)
82 * Get File Access Block.
84 if ((fab = _isfd_find(isfd)) == NULL) {
85 _setiserrno2(ENOTOPEN, '9', '0');
90 * Check that the open mode was ISINOUT.
92 if (fab->openmode != OM_INOUT) {
93 _setiserrno2(ENOTOPEN, '9', '0');
98 * Determine record length. Check it against min and max record length.
100 reclen = (fab->varlength == TRUE) ? isreclen : fab->minreclen;
101 if (reclen < fab->minreclen || reclen > fab->maxreclen) {
102 _setiserrno2(EBADARG, '9', '0');
106 if ((ret = _amrewcurr(&fab->isfhandle, record, reclen, &fab->curpos,
107 &recnum, &fab->errcode)) == ISOK) {
108 isrecnum = recnum; /* Set isrecnum */
111 _seterr_errcode(&fab->errcode);
113 return (ret); /* Successful write */
117 * _amrewcurr(isfhandle, record, reclen, curpos, recnum, errcode)
119 * _amrewcurr() rewrites the current record in ISAM file.
122 * isfhandle Handle of ISAM file
124 * reclen length of the record
125 * curpos curent record position
128 * errcode error status of the operation
129 * curpos new current position
130 * recnum record number fo current record
135 _amrewcurr(Bytearray *isfhandle, char *record, int reclen,
136 Bytearray *curpos, Recno *recnum, struct errcode *errcode)
142 char oldrecord[ISMAXRECLEN];
145 int (*rec_rewrite)();
150 * Get FCB corresponding to the isfhandle handle.
152 if ((fcb = _openfcb(isfhandle, errcode)) == NULL) {
157 rec_read = (fcb->varflag?_vlrec_read:_flrec_read);
158 rec_rewrite = (fcb->varflag?_vlrec_rewrite:_flrec_rewrite);
161 * Get info from current record position structure.
163 crp = (Crp *) curpos->data;
166 if (crp->flag != CRP_ON) {
167 _amseterrcode(errcode, ENOCURR);
172 * Update information in FCB from CNTL page on the disk
174 (void)_isfcb_cntlpg_r2(fcb);
177 * We must read the record first to be able to delete keys.
179 if (rec_read(fcb, oldrecord, crp->recno, &reclen2) != ISOK) {
180 _amseterrcode(errcode, ENOCURR);
184 if (rec_rewrite(fcb, record, crp->recno, reclen) != ISOK) {
185 _amseterrcode(errcode, ENOCURR);
190 * Update keys, set new key position.
192 newcurpos = _bytearr_dup(curpos);
193 if ((err = _changekeys2 (fcb, record, oldrecord, crp->recno, &newcurpos))
195 _bytearr_free(&newcurpos);
196 _amseterrcode(errcode, err);
201 * This takes care of new record position if the physical order is in use.
203 *recnum = crp->recno;
205 _bytearr_free(curpos);
206 crp = NULL; /* was aliased to freed curpos->data */
209 _amseterrcode(errcode, ISOK);
216 * Update control page.
218 (void)_isfcb_cntlpg_w2(fcb);
229 * Restore FCB from CNTL page.
231 (void)_isfcb_cntlpg_r2(fcb);
238 _changekeys2(Fcb *fcb, char *record, char *oldrecord,
239 Recno recnum, Bytearray *curpos)
241 int nkeys = fcb->nkeys;
248 crp = (Crp *)curpos->data;
251 for (i = 0; i < nkeys; i++) {
252 keydesc2 = fcb->keys + i;
253 if ((err =_change1key(fcb, keydesc2, record, oldrecord, recnum,
254 (keydesc2->k2_keyid == keyid) ?
255 crp->key : (char *) NULL)) != ISOK)