1 /* $Id: extract.c,v 1.155 2004-06-03 11:45:28 adam Exp $
2 Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004
5 This file is part of the Zebra server.
7 Zebra is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with Zebra; see the file LICENSE.zebra. If not, write to the
19 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
38 #if _FILE_OFFSET_BITS == 64
39 #define PRINTF_OFF_T "%Ld"
41 #define PRINTF_OFF_T "%ld"
44 #define USE_SHELLSORT 0
47 static void shellsort(void *ar, int r, size_t s,
48 int (*cmp)(const void *a, const void *b))
53 static const int incs[16] = { 1391376, 463792, 198768, 86961, 33936,
54 13776, 4592, 1968, 861, 336,
55 112, 48, 21, 7, 3, 1 };
56 for ( k = 0; k < 16; k++)
57 for (h = incs[k], i = h; i < r; i++)
61 while (j > h && (*cmp)(a + s*(j-h), v) > 0)
63 memcpy (a + s*j, a + s*(j-h), s);
71 static void logRecord (ZebraHandle zh)
73 ++zh->records_processed;
74 if (!(zh->records_processed % 1000))
76 logf (LOG_LOG, "Records: %7d i/u/d %d/%d/%d",
77 zh->records_processed, zh->records_inserted, zh->records_updated,
82 static void extract_init (struct recExtractCtrl *p, RecWord *w)
84 w->zebra_maps = p->zebra_maps;
86 w->attrSet = VAL_BIB1;
92 static const char **searchRecordKey (ZebraHandle zh,
93 struct recKeys *reckeys,
94 int attrSetS, int attrUseS)
96 static const char *ws[32];
108 for (i = 0; i<32; i++)
112 chS = zebraExplain_lookupSU (zh->reg->zei, attrSetS, attrUseS);
116 while (off < reckeys->buf_used)
119 const char *src = reckeys->buf + off;
127 memcpy (&ch, src, sizeof(ch));
133 memcpy (&attrSet, src, sizeof(attrSet));
134 src += sizeof(attrSet);
138 memcpy (&attrUse, src, sizeof(attrUse));
139 src += sizeof(attrUse);
146 seqno += ((lead>>2) & 15)-1;
149 memcpy (&seqno, src, sizeof(seqno));
150 src += sizeof(seqno);
156 attrUseS == attrUse && attrSetS == attrSet
165 woff = seqno - startSeq;
166 if (woff >= 0 && woff < 31)
170 off = src - reckeys->buf;
172 assert (off == reckeys->buf_used);
176 struct file_read_info {
177 off_t file_max; /* maximum offset so far */
178 off_t file_offset; /* current offset */
179 off_t file_moffset; /* offset of rec/rec boundary */
186 static struct file_read_info *file_read_start (int fd)
188 struct file_read_info *fi = (struct file_read_info *)
189 xmalloc (sizeof(*fi));
193 fi->file_moffset = 0;
199 static void file_read_stop (struct file_read_info *fi)
204 static off_t file_seek (void *handle, off_t offset)
206 struct file_read_info *p = (struct file_read_info *) handle;
207 p->file_offset = offset;
210 return lseek (p->fd, offset, SEEK_SET);
213 static off_t file_tell (void *handle)
215 struct file_read_info *p = (struct file_read_info *) handle;
216 return p->file_offset;
219 static int file_read (void *handle, char *buf, size_t count)
221 struct file_read_info *p = (struct file_read_info *) handle;
227 if (r > p->sdrmax - p->file_offset)
228 r = p->sdrmax - p->file_offset;
230 memcpy (buf, p->sdrbuf + p->file_offset, r);
233 r = read (fd, buf, count);
237 if (p->file_offset > p->file_max)
238 p->file_max = p->file_offset;
243 static void file_begin (void *handle)
245 struct file_read_info *p = (struct file_read_info *) handle;
247 p->file_offset = p->file_moffset;
248 if (!p->sdrbuf && p->file_moffset)
249 lseek (p->fd, p->file_moffset, SEEK_SET);
253 static void file_end (void *handle, off_t offset)
255 struct file_read_info *p = (struct file_read_info *) handle;
257 assert (p->file_more == 0);
259 p->file_moffset = offset;
262 static char *fileMatchStr (ZebraHandle zh,
263 struct recKeys *reckeys,
264 const char *fname, const char *spec)
266 static char dstBuf[2048]; /* static here ??? */
268 const char *s = spec;
269 static const char **w;
273 while (*s == ' ' || *s == '\t')
279 char attset_str[64], attname_str[64];
280 data1_attset *attset;
283 int attSet = 1, attUse = 1;
287 for (i = 0; *s && *s != ',' && *s != ')'; s++)
289 attset_str[i++] = *s;
290 attset_str[i] = '\0';
295 for (i = 0; *s && *s != ')'; s++)
297 attname_str[i++] = *s;
298 attname_str[i] = '\0';
301 if ((attset = data1_get_attset (zh->reg->dh, attset_str)))
304 attSet = attset->reference;
305 att = data1_getattbyname(zh->reg->dh, attset, attname_str);
309 attUse = atoi (attname_str);
311 w = searchRecordKey (zh, reckeys, attSet, attUse);
316 for (i = 0; i<32; i++)
321 logf (LOG_WARN, "Missing ) in match criteria %s in group %s",
322 spec, zh->m_group ? zh->m_group : "none");
327 for (i = 0; i<32; i++)
328 if (matchFlag[i] && w[i])
340 logf (LOG_WARN, "Record didn't contain match"
341 " fields in (%s,%s)", attset_str, attname_str);
349 const char *spec_src = NULL;
350 const char *s1 = ++s;
351 while (*s1 && *s1 != ' ' && *s1 != '\t')
357 memcpy (special, s, spec_len);
358 special[spec_len] = '\0';
361 if (!strcmp (special, "group"))
362 spec_src = zh->m_group;
363 else if (!strcmp (special, "database"))
364 spec_src = zh->basenames[0];
365 else if (!strcmp (special, "filename")) {
368 else if (!strcmp (special, "type"))
369 spec_src = zh->m_record_type;
374 strcpy (dst, spec_src);
375 dst += strlen (spec_src);
378 else if (*s == '\"' || *s == '\'')
380 int stopMarker = *s++;
384 while (*s && *s != stopMarker)
387 tmpString[i++] = *s++;
392 strcpy (dst, tmpString);
393 dst += strlen (tmpString);
397 logf (LOG_WARN, "Syntax error in match criteria %s in group %s",
398 spec, zh->m_group ? zh->m_group : "none");
405 logf (LOG_WARN, "No match criteria for record %s in group %s",
406 fname, zh->m_group ? zh->m_group : "none");
413 struct recordLogInfo {
416 struct recordGroup *rGroup;
419 static int file_extract_record(ZebraHandle zh,
420 SYSNO *sysno, const char *fname,
422 struct file_read_info *fi,
425 RecordAttr *recordAttr;
427 const char *matchStr;
430 off_t recordOffset = 0;
436 recType_byName (zh->reg->recTypes, zh->m_record_type, subType,
439 logf (LOG_WARN, "No such record type: %s", zh->m_record_type);
443 /* announce database */
444 if (zebraExplain_curDatabase (zh->reg->zei, zh->basenames[0]))
446 if (zebraExplain_newDatabase (zh->reg->zei, zh->basenames[0],
447 zh->m_explain_database))
453 struct recExtractCtrl extractCtrl;
455 /* we are going to read from a file, so prepare the extraction */
458 zh->reg->keys.buf_used = 0;
459 zh->reg->keys.prevAttrUse = -1;
460 zh->reg->keys.prevAttrSet = -1;
461 zh->reg->keys.prevSeqNo = 0;
462 zh->reg->sortKeys.buf_used = 0;
464 recordOffset = fi->file_moffset;
465 extractCtrl.offset = fi->file_moffset;
466 extractCtrl.readf = file_read;
467 extractCtrl.seekf = file_seek;
468 extractCtrl.tellf = file_tell;
469 extractCtrl.endf = file_end;
471 extractCtrl.subType = subType;
472 extractCtrl.init = extract_init;
473 extractCtrl.tokenAdd = extract_token_add;
474 extractCtrl.schemaAdd = extract_schema_add;
475 extractCtrl.dh = zh->reg->dh;
476 extractCtrl.handle = zh;
477 for (i = 0; i<256; i++)
479 if (zebra_maps_is_positioned(zh->reg->zebra_maps, i))
480 extractCtrl.seqno[i] = 1;
482 extractCtrl.seqno[i] = 0;
484 extractCtrl.zebra_maps = zh->reg->zebra_maps;
485 extractCtrl.flagShowRecords = !zh->m_flag_rw;
488 printf ("File: %s " PRINTF_OFF_T "\n", fname, recordOffset);
492 sprintf (msg, "%s:" PRINTF_OFF_T , fname, recordOffset);
493 yaz_log_init_prefix2 (msg);
496 r = (*recType->extract)(clientData, &extractCtrl);
498 yaz_log_init_prefix2 (0);
499 if (r == RECCTRL_EXTRACT_EOF)
501 else if (r == RECCTRL_EXTRACT_ERROR_GENERIC)
503 /* error occured during extraction ... */
505 zh->records_processed < zh->m_file_verbose_limit)
507 logf (LOG_WARN, "fail %s %s " PRINTF_OFF_T, zh->m_record_type,
508 fname, recordOffset);
512 else if (r == RECCTRL_EXTRACT_ERROR_NO_SUCH_FILTER)
514 /* error occured during extraction ... */
516 zh->records_processed < zh->m_file_verbose_limit)
518 logf (LOG_WARN, "no filter for %s %s "
519 PRINTF_OFF_T, zh->m_record_type,
520 fname, recordOffset);
524 if (zh->reg->keys.buf_used == 0)
526 /* the extraction process returned no information - the record
527 is probably empty - unless flagShowRecords is in use */
531 logf (LOG_WARN, "empty %s %s " PRINTF_OFF_T, zh->m_record_type,
532 fname, recordOffset);
537 /* perform match if sysno not known and if match criteria is specified */
544 if (zh->m_record_id && *zh->m_record_id)
548 matchStr = fileMatchStr (zh, &zh->reg->keys, fname,
552 rinfo = dict_lookup (zh->reg->matchDict, matchStr);
554 memcpy (sysno, rinfo+1, sizeof(*sysno));
558 logf (LOG_WARN, "Bad match criteria");
569 logf (LOG_LOG, "delete %s %s " PRINTF_OFF_T, zh->m_record_type,
570 fname, recordOffset);
571 logf (LOG_WARN, "cannot delete record above (seems new)");
574 if (zh->records_processed < zh->m_file_verbose_limit)
575 logf (LOG_LOG, "add %s %s " PRINTF_OFF_T, zh->m_record_type,
576 fname, recordOffset);
577 rec = rec_new (zh->reg->records);
581 recordAttr = rec_init_attr (zh->reg->zei, rec);
585 dict_insert (zh->reg->matchDict, matchStr, sizeof(*sysno), sysno);
587 extract_flushSortKeys (zh, *sysno, 1, &zh->reg->sortKeys);
588 extract_flushRecordKeys (zh, *sysno, 1, &zh->reg->keys);
590 zh->records_inserted++;
594 /* record already exists */
595 struct recKeys delkeys;
596 struct sortKeys sortKeys;
598 rec = rec_get (zh->reg->records, *sysno);
601 recordAttr = rec_init_attr (zh->reg->zei, rec);
603 if (!force_update && recordAttr->runNumber ==
604 zebraExplain_runNumberIncrement (zh->reg->zei, 0))
606 yaz_log (LOG_LOG, "run number = %d", recordAttr->runNumber);
607 yaz_log (LOG_LOG, "skipped %s %s " PRINTF_OFF_T,
608 zh->m_record_type, fname, recordOffset);
609 extract_flushSortKeys (zh, *sysno, -1, &zh->reg->sortKeys);
614 delkeys.buf_used = rec->size[recInfo_delKeys];
615 delkeys.buf = rec->info[recInfo_delKeys];
617 sortKeys.buf_used = rec->size[recInfo_sortKeys];
618 sortKeys.buf = rec->info[recInfo_sortKeys];
620 extract_flushSortKeys (zh, *sysno, 0, &sortKeys);
621 extract_flushRecordKeys (zh, *sysno, 0, &delkeys);
624 /* record going to be deleted */
625 if (!delkeys.buf_used)
627 logf (LOG_LOG, "delete %s %s " PRINTF_OFF_T,
628 zh->m_record_type, fname, recordOffset);
629 logf (LOG_WARN, "cannot delete file above, storeKeys false");
633 if (zh->records_processed < zh->m_file_verbose_limit)
634 logf (LOG_LOG, "delete %s %s " PRINTF_OFF_T,
635 zh->m_record_type, fname, recordOffset);
636 zh->records_deleted++;
638 dict_delete (zh->reg->matchDict, matchStr);
639 rec_del (zh->reg->records, &rec);
647 /* record going to be updated */
648 if (!delkeys.buf_used)
650 logf (LOG_LOG, "update %s %s " PRINTF_OFF_T,
651 zh->m_record_type, fname, recordOffset);
652 logf (LOG_WARN, "cannot update file above, storeKeys false");
656 if (zh->records_processed < zh->m_file_verbose_limit)
657 logf (LOG_LOG, "update %s %s " PRINTF_OFF_T,
658 zh->m_record_type, fname, recordOffset);
659 extract_flushSortKeys (zh, *sysno, 1, &zh->reg->sortKeys);
660 extract_flushRecordKeys (zh, *sysno, 1, &zh->reg->keys);
661 zh->records_updated++;
665 /* update file type */
666 xfree (rec->info[recInfo_fileType]);
667 rec->info[recInfo_fileType] =
668 rec_strdup (zh->m_record_type, &rec->size[recInfo_fileType]);
670 /* update filename */
671 xfree (rec->info[recInfo_filename]);
672 rec->info[recInfo_filename] =
673 rec_strdup (fname, &rec->size[recInfo_filename]);
675 /* update delete keys */
676 xfree (rec->info[recInfo_delKeys]);
677 if (zh->reg->keys.buf_used > 0 && zh->m_store_keys == 1)
679 rec->size[recInfo_delKeys] = zh->reg->keys.buf_used;
680 rec->info[recInfo_delKeys] = zh->reg->keys.buf;
681 zh->reg->keys.buf = NULL;
682 zh->reg->keys.buf_max = 0;
686 rec->info[recInfo_delKeys] = NULL;
687 rec->size[recInfo_delKeys] = 0;
690 /* update sort keys */
691 xfree (rec->info[recInfo_sortKeys]);
693 rec->size[recInfo_sortKeys] = zh->reg->sortKeys.buf_used;
694 rec->info[recInfo_sortKeys] = zh->reg->sortKeys.buf;
695 zh->reg->sortKeys.buf = NULL;
696 zh->reg->sortKeys.buf_max = 0;
698 /* save file size of original record */
699 zebraExplain_recordBytesIncrement (zh->reg->zei,
700 - recordAttr->recordSize);
701 recordAttr->recordSize = fi->file_moffset - recordOffset;
702 if (!recordAttr->recordSize)
703 recordAttr->recordSize = fi->file_max - recordOffset;
704 zebraExplain_recordBytesIncrement (zh->reg->zei,
705 recordAttr->recordSize);
707 /* set run-number for this record */
708 recordAttr->runNumber = zebraExplain_runNumberIncrement (zh->reg->zei,
711 /* update store data */
712 xfree (rec->info[recInfo_storeData]);
713 if (zh->m_store_data)
715 rec->size[recInfo_storeData] = recordAttr->recordSize;
716 rec->info[recInfo_storeData] = (char *)
717 xmalloc (recordAttr->recordSize);
718 if (lseek (fi->fd, recordOffset, SEEK_SET) < 0)
720 logf (LOG_ERRNO|LOG_FATAL, "seek to " PRINTF_OFF_T " in %s",
721 recordOffset, fname);
724 if (read (fi->fd, rec->info[recInfo_storeData], recordAttr->recordSize)
725 < recordAttr->recordSize)
727 logf (LOG_ERRNO|LOG_FATAL, "read %d bytes of %s",
728 recordAttr->recordSize, fname);
734 rec->info[recInfo_storeData] = NULL;
735 rec->size[recInfo_storeData] = 0;
737 /* update database name */
738 xfree (rec->info[recInfo_databaseName]);
739 rec->info[recInfo_databaseName] =
740 rec_strdup (zh->basenames[0], &rec->size[recInfo_databaseName]);
743 recordAttr->recordOffset = recordOffset;
745 /* commit this record */
746 rec_put (zh->reg->records, &rec);
751 int fileExtract (ZebraHandle zh, SYSNO *sysno, const char *fname,
758 struct file_read_info *fi;
759 const char *original_record_type = 0;
761 if (!zh->m_group || !*zh->m_group)
764 sprintf (gprefix, "%s.", zh->m_group);
766 logf (LOG_DEBUG, "fileExtract %s", fname);
768 /* determine file extension */
770 for (i = strlen(fname); --i >= 0; )
773 else if (fname[i] == '.')
775 strcpy (ext, fname+i+1);
778 /* determine file type - depending on extension */
779 original_record_type = zh->m_record_type;
780 if (!zh->m_record_type)
782 sprintf (ext_res, "%srecordType.%s", gprefix, ext);
783 zh->m_record_type = res_get (zh->res, ext_res);
785 if (!zh->m_record_type)
787 if (zh->records_processed < zh->m_file_verbose_limit)
788 logf (LOG_LOG, "? %s", fname);
791 /* determine match criteria */
792 if (!zh->m_record_id)
794 sprintf (ext_res, "%srecordId.%s", gprefix, ext);
795 zh->m_record_id = res_get (zh->res, ext_res);
798 if (sysno && deleteFlag)
804 if (zh->path_reg && !yaz_is_abspath (fname))
806 strcpy (full_rep, zh->path_reg);
807 strcat (full_rep, "/");
808 strcat (full_rep, fname);
811 strcpy (full_rep, fname);
814 if ((fd = open (full_rep, O_BINARY|O_RDONLY)) == -1)
816 logf (LOG_WARN|LOG_ERRNO, "open %s", full_rep);
817 zh->m_record_type = original_record_type;
821 fi = file_read_start (fd);
825 r = file_extract_record (zh, sysno, fname, deleteFlag, fi, 1);
826 } while (r && !sysno && fi->file_more);
830 zh->m_record_type = original_record_type;
835 If sysno is provided, then it's used to identify the reocord.
836 If not, and match_criteria is provided, then sysno is guessed
837 If not, and a record is provided, then sysno is got from there
840 int buffer_extract_record (ZebraHandle zh,
841 const char *buf, size_t buf_size,
844 const char *recordType,
846 const char *match_criteria,
851 RecordAttr *recordAttr;
852 struct recExtractCtrl extractCtrl;
854 const char *matchStr = 0;
855 RecType recType = NULL;
859 long recordOffset = 0;
860 struct zebra_fetch_control fc;
861 const char *pr_fname = fname; /* filename to print .. */
864 pr_fname = "<no file>"; /* make it printable if file is omitted */
867 fc.record_int_buf = buf;
868 fc.record_int_len = buf_size;
869 fc.record_int_pos = 0;
871 fc.record_offset = 0;
873 extractCtrl.offset = 0;
874 extractCtrl.readf = zebra_record_int_read;
875 extractCtrl.seekf = zebra_record_int_seek;
876 extractCtrl.tellf = zebra_record_int_tell;
877 extractCtrl.endf = zebra_record_int_end;
878 extractCtrl.fh = &fc;
880 zh->reg->keys.buf_used = 0;
881 zh->reg->keys.prevAttrUse = -1;
882 zh->reg->keys.prevAttrSet = -1;
883 zh->reg->keys.prevSeqNo = 0;
884 zh->reg->sortKeys.buf_used = 0;
886 if (zebraExplain_curDatabase (zh->reg->zei, zh->basenames[0]))
888 if (zebraExplain_newDatabase (zh->reg->zei, zh->basenames[0],
889 zh->m_explain_database))
893 if (recordType && *recordType) {
894 logf (LOG_DEBUG, "Record type explicitly specified: %s", recordType);
895 recType = recType_byName (zh->reg->recTypes, recordType, subType,
898 if (!(zh->m_record_type)) {
899 logf (LOG_WARN, "No such record type defined");
902 logf (LOG_DEBUG, "Get record type from rgroup: %s",zh->m_record_type);
903 recType = recType_byName (zh->reg->recTypes, zh->m_record_type, subType,
905 recordType = zh->m_record_type;
909 logf (LOG_WARN, "No such record type: %s", zh->m_record_type);
913 extractCtrl.subType = subType;
914 extractCtrl.init = extract_init;
915 extractCtrl.tokenAdd = extract_token_add;
916 extractCtrl.schemaAdd = extract_schema_add;
917 extractCtrl.dh = zh->reg->dh;
918 extractCtrl.handle = zh;
919 extractCtrl.zebra_maps = zh->reg->zebra_maps;
920 extractCtrl.flagShowRecords = 0;
921 for (i = 0; i<256; i++)
923 if (zebra_maps_is_positioned(zh->reg->zebra_maps, i))
924 extractCtrl.seqno[i] = 1;
926 extractCtrl.seqno[i] = 0;
929 r = (*recType->extract)(clientData, &extractCtrl);
931 if (r == RECCTRL_EXTRACT_EOF)
933 else if (r == RECCTRL_EXTRACT_ERROR_GENERIC)
935 /* error occured during extraction ... */
936 yaz_log (LOG_WARN, "extract error: generic");
939 else if (r == RECCTRL_EXTRACT_ERROR_NO_SUCH_FILTER)
941 /* error occured during extraction ... */
942 yaz_log (LOG_WARN, "extract error: no such filter");
945 if (zh->reg->keys.buf_used == 0)
947 /* the extraction process returned no information - the record
948 is probably empty - unless flagShowRecords is in use */
951 logf (LOG_WARN, "No keys generated for record");
952 logf (LOG_WARN, " The file is probably empty");
960 if (match_criteria && *match_criteria) {
961 matchStr = match_criteria;
963 if (zh->m_record_id && *zh->m_record_id) {
964 matchStr = fileMatchStr (zh, &zh->reg->keys, pr_fname,
968 logf (LOG_WARN, "Bad match criteria (recordID)");
974 rinfo = dict_lookup (zh->reg->matchDict, matchStr);
976 memcpy (sysno, rinfo+1, sizeof(*sysno));
985 logf (LOG_LOG, "delete %s %s %ld", recordType,
986 pr_fname, (long) recordOffset);
987 logf (LOG_WARN, "cannot delete record above (seems new)");
990 logf (LOG_LOG, "add %s %s %ld", recordType, pr_fname,
991 (long) recordOffset);
992 rec = rec_new (zh->reg->records);
996 recordAttr = rec_init_attr (zh->reg->zei, rec);
1000 dict_insert (zh->reg->matchDict, matchStr,
1001 sizeof(*sysno), sysno);
1003 extract_flushSortKeys (zh, *sysno, 1, &zh->reg->sortKeys);
1004 extract_flushRecordKeys (zh, *sysno, 1, &zh->reg->keys);
1006 zh->records_inserted++;
1010 /* record already exists */
1011 struct recKeys delkeys;
1012 struct sortKeys sortKeys;
1014 if (!allow_update) {
1015 logf (LOG_LOG, "skipped %s %s %ld",
1016 recordType, pr_fname, (long) recordOffset);
1021 rec = rec_get (zh->reg->records, *sysno);
1024 recordAttr = rec_init_attr (zh->reg->zei, rec);
1026 if (!force_update) {
1027 if (recordAttr->runNumber ==
1028 zebraExplain_runNumberIncrement (zh->reg->zei, 0))
1030 logf (LOG_LOG, "skipped %s %s %ld", recordType,
1031 pr_fname, (long) recordOffset);
1032 extract_flushSortKeys (zh, *sysno, -1, &zh->reg->sortKeys);
1039 delkeys.buf_used = rec->size[recInfo_delKeys];
1040 delkeys.buf = rec->info[recInfo_delKeys];
1042 sortKeys.buf_used = rec->size[recInfo_sortKeys];
1043 sortKeys.buf = rec->info[recInfo_sortKeys];
1045 extract_flushSortKeys (zh, *sysno, 0, &sortKeys);
1046 extract_flushRecordKeys (zh, *sysno, 0, &delkeys);
1049 /* record going to be deleted */
1050 if (!delkeys.buf_used)
1052 logf (LOG_LOG, "delete %s %s %ld", recordType,
1053 pr_fname, (long) recordOffset);
1054 logf (LOG_WARN, "cannot delete file above, storeKeys false");
1058 logf (LOG_LOG, "delete %s %s %ld", recordType,
1059 pr_fname, (long) recordOffset);
1060 zh->records_deleted++;
1062 dict_delete (zh->reg->matchDict, matchStr);
1063 rec_del (zh->reg->records, &rec);
1071 /* record going to be updated */
1072 if (!delkeys.buf_used)
1074 logf (LOG_LOG, "update %s %s %ld", recordType,
1075 pr_fname, (long) recordOffset);
1076 logf (LOG_WARN, "cannot update file above, storeKeys false");
1080 logf (LOG_LOG, "update %s %s %ld", recordType,
1081 pr_fname, (long) recordOffset);
1082 extract_flushSortKeys (zh, *sysno, 1, &zh->reg->sortKeys);
1083 extract_flushRecordKeys (zh, *sysno, 1, &zh->reg->keys);
1084 zh->records_updated++;
1088 /* update file type */
1089 xfree (rec->info[recInfo_fileType]);
1090 rec->info[recInfo_fileType] =
1091 rec_strdup (recordType, &rec->size[recInfo_fileType]);
1093 /* update filename */
1094 xfree (rec->info[recInfo_filename]);
1095 rec->info[recInfo_filename] =
1096 rec_strdup (fname, &rec->size[recInfo_filename]);
1098 /* update delete keys */
1099 xfree (rec->info[recInfo_delKeys]);
1100 if (zh->reg->keys.buf_used > 0 && zh->m_store_keys == 1)
1102 rec->size[recInfo_delKeys] = zh->reg->keys.buf_used;
1103 rec->info[recInfo_delKeys] = zh->reg->keys.buf;
1104 zh->reg->keys.buf = NULL;
1105 zh->reg->keys.buf_max = 0;
1109 rec->info[recInfo_delKeys] = NULL;
1110 rec->size[recInfo_delKeys] = 0;
1113 /* update sort keys */
1114 xfree (rec->info[recInfo_sortKeys]);
1116 rec->size[recInfo_sortKeys] = zh->reg->sortKeys.buf_used;
1117 rec->info[recInfo_sortKeys] = zh->reg->sortKeys.buf;
1118 zh->reg->sortKeys.buf = NULL;
1119 zh->reg->sortKeys.buf_max = 0;
1121 /* save file size of original record */
1122 zebraExplain_recordBytesIncrement (zh->reg->zei,
1123 - recordAttr->recordSize);
1125 recordAttr->recordSize = fi->file_moffset - recordOffset;
1126 if (!recordAttr->recordSize)
1127 recordAttr->recordSize = fi->file_max - recordOffset;
1129 recordAttr->recordSize = buf_size;
1131 zebraExplain_recordBytesIncrement (zh->reg->zei,
1132 recordAttr->recordSize);
1134 /* set run-number for this record */
1135 recordAttr->runNumber =
1136 zebraExplain_runNumberIncrement (zh->reg->zei, 0);
1138 /* update store data */
1139 xfree (rec->info[recInfo_storeData]);
1140 if (zh->m_store_data)
1142 rec->size[recInfo_storeData] = recordAttr->recordSize;
1143 rec->info[recInfo_storeData] = (char *)
1144 xmalloc (recordAttr->recordSize);
1145 memcpy (rec->info[recInfo_storeData], buf, recordAttr->recordSize);
1149 rec->info[recInfo_storeData] = NULL;
1150 rec->size[recInfo_storeData] = 0;
1152 /* update database name */
1153 xfree (rec->info[recInfo_databaseName]);
1154 rec->info[recInfo_databaseName] =
1155 rec_strdup (zh->basenames[0], &rec->size[recInfo_databaseName]);
1158 recordAttr->recordOffset = recordOffset;
1160 /* commit this record */
1161 rec_put (zh->reg->records, &rec);
1166 int explain_extract (void *handle, Record rec, data1_node *n)
1168 ZebraHandle zh = (ZebraHandle) handle;
1169 struct recExtractCtrl extractCtrl;
1172 if (zebraExplain_curDatabase (zh->reg->zei,
1173 rec->info[recInfo_databaseName]))
1176 if (zebraExplain_newDatabase (zh->reg->zei,
1177 rec->info[recInfo_databaseName], 0))
1181 zh->reg->keys.buf_used = 0;
1182 zh->reg->keys.prevAttrUse = -1;
1183 zh->reg->keys.prevAttrSet = -1;
1184 zh->reg->keys.prevSeqNo = 0;
1185 zh->reg->sortKeys.buf_used = 0;
1187 extractCtrl.init = extract_init;
1188 extractCtrl.tokenAdd = extract_token_add;
1189 extractCtrl.schemaAdd = extract_schema_add;
1190 extractCtrl.dh = zh->reg->dh;
1191 for (i = 0; i<256; i++)
1192 extractCtrl.seqno[i] = 0;
1193 extractCtrl.zebra_maps = zh->reg->zebra_maps;
1194 extractCtrl.flagShowRecords = 0;
1195 extractCtrl.handle = handle;
1198 grs_extract_tree(&extractCtrl, n);
1200 if (rec->size[recInfo_delKeys])
1202 struct recKeys delkeys;
1203 struct sortKeys sortkeys;
1205 delkeys.buf_used = rec->size[recInfo_delKeys];
1206 delkeys.buf = rec->info[recInfo_delKeys];
1208 sortkeys.buf_used = rec->size[recInfo_sortKeys];
1209 sortkeys.buf = rec->info[recInfo_sortKeys];
1211 extract_flushSortKeys (zh, rec->sysno, 0, &sortkeys);
1212 extract_flushRecordKeys (zh, rec->sysno, 0, &delkeys);
1214 extract_flushRecordKeys (zh, rec->sysno, 1, &zh->reg->keys);
1215 extract_flushSortKeys (zh, rec->sysno, 1, &zh->reg->sortKeys);
1217 xfree (rec->info[recInfo_delKeys]);
1218 rec->size[recInfo_delKeys] = zh->reg->keys.buf_used;
1219 rec->info[recInfo_delKeys] = zh->reg->keys.buf;
1220 zh->reg->keys.buf = NULL;
1221 zh->reg->keys.buf_max = 0;
1223 xfree (rec->info[recInfo_sortKeys]);
1224 rec->size[recInfo_sortKeys] = zh->reg->sortKeys.buf_used;
1225 rec->info[recInfo_sortKeys] = zh->reg->sortKeys.buf;
1226 zh->reg->sortKeys.buf = NULL;
1227 zh->reg->sortKeys.buf_max = 0;
1232 void extract_flushRecordKeys (ZebraHandle zh, SYSNO sysno,
1233 int cmd, struct recKeys *reckeys)
1237 unsigned char attrSet = (unsigned char) -1;
1238 unsigned short attrUse = (unsigned short) -1;
1243 ZebraExplainInfo zei = zh->reg->zei;
1245 if (!zh->reg->key_buf)
1247 int mem= 1024*1024* atoi( res_get_def( zh->res, "memmax", "8"));
1250 logf(LOG_WARN, "Invalid memory setting, using default 8 MB");
1253 /* FIXME: That "8" should be in a default settings include */
1254 /* not hard-coded here! -H */
1255 zh->reg->key_buf = (char**) xmalloc (mem);
1256 zh->reg->ptr_top = mem/sizeof(char*);
1258 zh->reg->key_buf_used = 0;
1259 zh->reg->key_file_no = 0;
1261 zebraExplain_recordCountIncrement (zei, cmd ? 1 : -1);
1262 while (off < reckeys->buf_used)
1264 const char *src = reckeys->buf + off;
1273 memcpy (&ch, src, sizeof(ch));
1279 memcpy (&attrSet, src, sizeof(attrSet));
1280 src += sizeof(attrSet);
1284 memcpy (&attrUse, src, sizeof(attrUse));
1285 src += sizeof(attrUse);
1288 if (zh->reg->key_buf_used + 1024 >
1289 (zh->reg->ptr_top -zh->reg->ptr_i)*sizeof(char*))
1290 extract_flushWriteKeys (zh,0);
1291 assert(zh->reg->ptr_i >= 0);
1293 assert(zh->reg->ptr_i > 0);
1294 (zh->reg->key_buf)[zh->reg->ptr_top - zh->reg->ptr_i] =
1295 (char*)zh->reg->key_buf + zh->reg->key_buf_used;
1298 ch = zebraExplain_lookupSU (zei, attrSet, attrUse);
1300 ch = zebraExplain_addSU (zei, attrSet, attrUse);
1303 zh->reg->key_buf_used +=
1304 key_SU_encode (ch,((char*)zh->reg->key_buf) +
1305 zh->reg->key_buf_used);
1308 ((char*)zh->reg->key_buf) [(zh->reg->key_buf_used)++] = *src++;
1310 ((char*)(zh->reg->key_buf))[(zh->reg->key_buf_used)++] = '\0';
1311 ((char*)(zh->reg->key_buf))[(zh->reg->key_buf_used)++] = cmd;
1314 seqno += ((lead>>2) & 15)-1;
1317 memcpy (&seqno, src, sizeof(seqno));
1318 src += sizeof(seqno);
1322 memcpy ((char*)zh->reg->key_buf + zh->reg->key_buf_used, &key, sizeof(key));
1323 (zh->reg->key_buf_used) += sizeof(key);
1324 off = src - reckeys->buf;
1326 assert (off == reckeys->buf_used);
1329 void extract_flushWriteKeys (ZebraHandle zh, int final)
1330 /* optimizing: if final=1, and no files written yet */
1331 /* push the keys directly to merge, sidestepping the */
1332 /* temp file altogether. Speeds small updates */
1335 char out_fname[200];
1337 struct encode_info encode_info;
1338 int ptr_i = zh->reg->ptr_i;
1343 if (!zh->reg->key_buf || ptr_i <= 0)
1345 logf (LOG_DEBUG, " nothing to flush section=%d buf=%p i=%d",
1346 zh->reg->key_file_no, zh->reg->key_buf, ptr_i);
1347 logf (LOG_DEBUG, " buf=%p ",
1349 logf (LOG_DEBUG, " ptr=%d ",zh->reg->ptr_i);
1350 logf (LOG_DEBUG, " reg=%p ",zh->reg);
1355 (zh->reg->key_file_no)++;
1356 logf (LOG_LOG, "sorting section %d", (zh->reg->key_file_no));
1357 logf (LOG_DEBUG, " sort_buff at %p n=%d",
1358 zh->reg->key_buf + zh->reg->ptr_top - ptr_i,ptr_i);
1360 qsort (zh->reg->key_buf + zh->reg->ptr_top - ptr_i, ptr_i,
1361 sizeof(char*), key_qsort_compare);
1363 /* zebra.cfg: tempfiles:
1364 Y: always use temp files (old way)
1365 A: use temp files, if more than one (auto)
1366 = if this is both the last and the first
1367 N: never bother with temp files (new) */
1369 temp_policy=toupper(res_get_def(zh->res,"tempfiles","auto")[0]);
1370 if (temp_policy != 'Y' && temp_policy != 'N' && temp_policy != 'A') {
1371 logf (LOG_WARN, "Illegal tempfiles setting '%c'. using 'Auto' ",
1376 if ( ( temp_policy =='N' ) || /* always from memory */
1377 ( ( temp_policy =='A' ) && /* automatic */
1378 (zh->reg->key_file_no == 1) && /* this is first time */
1379 (final) ) ) /* and last (=only) time */
1380 { /* go directly from memory */
1381 zh->reg->key_file_no =0; /* signal not to read files */
1382 zebra_index_merge(zh);
1384 zh->reg->key_buf_used = 0;
1388 /* Not doing directly from memory, write into a temp file */
1389 extract_get_fname_tmp (zh, out_fname, zh->reg->key_file_no);
1391 if (!(outf = fopen (out_fname, "wb")))
1393 logf (LOG_FATAL|LOG_ERRNO, "fopen %s", out_fname);
1396 logf (LOG_LOG, "writing section %d", zh->reg->key_file_no);
1397 prevcp = cp = (zh->reg->key_buf)[zh->reg->ptr_top - ptr_i];
1399 encode_key_init (&encode_info);
1400 encode_key_write (cp, &encode_info, outf);
1404 cp = (zh->reg->key_buf)[zh->reg->ptr_top - ptr_i];
1405 if (strcmp (cp, prevcp))
1407 encode_key_flush ( &encode_info, outf);
1408 encode_key_init (&encode_info);
1409 encode_key_write (cp, &encode_info, outf);
1413 encode_key_write (cp + strlen(cp), &encode_info, outf);
1415 encode_key_flush ( &encode_info, outf);
1417 qsort (key_buf + ptr_top-ptr_i, ptr_i, sizeof(char*), key_x_compare);
1418 extract_get_fname_tmp (out_fname, key_file_no);
1420 if (!(outf = fopen (out_fname, "wb")))
1422 logf (LOG_FATAL|LOG_ERRNO, "fopen %s", out_fname);
1425 logf (LOG_LOG, "writing section %d", key_file_no);
1427 prevcp = key_buf[ptr_top-i];
1429 if (!--i || strcmp (prevcp, key_buf[ptr_top-i]))
1431 key_y_len = strlen(prevcp)+1;
1433 logf (LOG_LOG, "key_y_len: %2d %02x %02x %s",
1434 key_y_len, prevcp[0], prevcp[1], 2+prevcp);
1436 qsort (key_buf + ptr_top-ptr_i, ptr_i - i,
1437 sizeof(char*), key_y_compare);
1438 cp = key_buf[ptr_top-ptr_i];
1440 encode_key_init (&encode_info);
1441 encode_key_write (cp, &encode_info, outf);
1444 cp = key_buf[ptr_top-ptr_i];
1445 encode_key_write (cp+key_y_len, &encode_info, outf);
1447 encode_key_flush ( &encode_info, outf);
1450 prevcp = key_buf[ptr_top-ptr_i];
1455 logf (LOG_FATAL|LOG_ERRNO, "fclose %s", out_fname);
1458 logf (LOG_LOG, "finished section %d", zh->reg->key_file_no);
1460 zh->reg->key_buf_used = 0;
1463 void extract_add_index_string (RecWord *p, const char *string,
1467 unsigned char attrSet;
1468 unsigned short attrUse;
1471 int *pseqno = &p->seqno;
1472 ZebraHandle zh = p->extractCtrl->handle;
1473 ZebraExplainInfo zei = zh->reg->zei;
1474 struct recKeys *keys = &zh->reg->keys;
1476 if (keys->buf_used+1024 > keys->buf_max)
1480 b = (char *) xmalloc (keys->buf_max += 128000);
1481 if (keys->buf_used > 0)
1482 memcpy (b, keys->buf, keys->buf_used);
1486 dst = keys->buf + keys->buf_used;
1488 /* leader byte is encoded as follows:
1489 bit 0 : 1 if attrset is unchanged; 0 if attrset is changed
1490 bit 1 : 1 if attruse is unchanged; 0 if attruse is changed
1492 attrSet = p->attrSet;
1493 if (keys->buf_used > 0 && keys->prevAttrSet == attrSet)
1496 keys->prevAttrSet = attrSet;
1497 attrUse = p->attrUse;
1498 if (keys->buf_used > 0 && keys->prevAttrUse == attrUse)
1501 keys->prevAttrUse = attrUse;
1503 diff = 1 + *pseqno - keys->prevSeqNo;
1504 if (diff >= 1 && diff <= 15)
1505 lead |= (diff << 2);
1509 keys->prevSeqNo = *pseqno;
1516 int ch = zebraExplain_lookupSU (zei, attrSet, attrUse);
1519 ch = zebraExplain_addSU (zei, attrSet, attrUse);
1520 yaz_log (LOG_DEBUG, "addSU set=%d use=%d SU=%d",
1521 attrSet, attrUse, ch);
1524 memcpy (dst, &ch, sizeof(ch));
1530 memcpy (dst, &attrSet, sizeof(attrSet));
1531 dst += sizeof(attrSet);
1535 memcpy (dst, &attrUse, sizeof(attrUse));
1536 dst += sizeof(attrUse);
1539 *dst++ = p->reg_type;
1540 memcpy (dst, string, length);
1546 memcpy (dst, pseqno, sizeof(*pseqno));
1547 dst += sizeof(*pseqno);
1549 keys->buf_used = dst - keys->buf;
1552 static void extract_add_sort_string (RecWord *p, const char *string,
1555 ZebraHandle zh = p->extractCtrl->handle;
1556 struct sortKeys *sk = &zh->reg->sortKeys;
1559 while (off < sk->buf_used)
1563 off += key_SU_decode(&set, sk->buf + off);
1564 off += key_SU_decode(&use, sk->buf + off);
1565 off += key_SU_decode(&slen, sk->buf + off);
1567 if (p->attrSet == set && p->attrUse == use)
1570 assert (off == sk->buf_used);
1572 if (sk->buf_used + IT_MAX_WORD > sk->buf_max)
1576 b = (char *) xmalloc (sk->buf_max += 128000);
1577 if (sk->buf_used > 0)
1578 memcpy (b, sk->buf, sk->buf_used);
1582 off += key_SU_encode(p->attrSet, sk->buf + off);
1583 off += key_SU_encode(p->attrUse, sk->buf + off);
1584 off += key_SU_encode(length, sk->buf + off);
1585 memcpy (sk->buf + off, string, length);
1586 sk->buf_used = off + length;
1589 void extract_add_string (RecWord *p, const char *string, int length)
1591 assert (length > 0);
1592 if (zebra_maps_is_sort (p->zebra_maps, p->reg_type))
1593 extract_add_sort_string (p, string, length);
1595 extract_add_index_string (p, string, length);
1598 static void extract_add_incomplete_field (RecWord *p)
1600 const char *b = p->string;
1601 int remain = p->length;
1602 const char **map = 0;
1605 map = zebra_maps_input(p->zebra_maps, p->reg_type, &b, remain);
1609 char buf[IT_MAX_WORD+1];
1613 while (map && *map && **map == *CHR_SPACE)
1615 remain = p->length - (b - p->string);
1617 map = zebra_maps_input(p->zebra_maps, p->reg_type, &b, remain);
1624 while (map && *map && **map != *CHR_SPACE)
1626 const char *cp = *map;
1628 while (i < IT_MAX_WORD && *cp)
1630 remain = p->length - (b - p->string);
1632 map = zebra_maps_input(p->zebra_maps, p->reg_type, &b, remain);
1638 extract_add_string (p, buf, i);
1643 static void extract_add_complete_field (RecWord *p)
1645 const char *b = p->string;
1646 char buf[IT_MAX_WORD+1];
1647 const char **map = 0;
1648 int i = 0, remain = p->length;
1651 map = zebra_maps_input (p->zebra_maps, p->reg_type, &b, remain);
1653 while (remain > 0 && i < IT_MAX_WORD)
1655 while (map && *map && **map == *CHR_SPACE)
1657 remain = p->length - (b - p->string);
1659 map = zebra_maps_input(p->zebra_maps, p->reg_type, &b, remain);
1666 if (i && i < IT_MAX_WORD)
1667 buf[i++] = *CHR_SPACE;
1668 while (map && *map && **map != *CHR_SPACE)
1670 const char *cp = *map;
1672 if (i >= IT_MAX_WORD)
1674 while (i < IT_MAX_WORD && *cp)
1676 remain = p->length - (b - p->string);
1678 map = zebra_maps_input (p->zebra_maps, p->reg_type, &b,
1686 extract_add_string (p, buf, i);
1689 void extract_token_add (RecWord *p)
1693 yaz_log (LOG_LOG, "token_add "
1694 "reg_type=%c attrSet=%d attrUse=%d seqno=%d s=%.*s",
1695 p->reg_type, p->attrSet, p->attrUse, p->seqno, p->length,
1698 if ((wrbuf = zebra_replace(p->zebra_maps, p->reg_type, 0,
1699 p->string, p->length)))
1701 p->string = wrbuf_buf(wrbuf);
1702 p->length = wrbuf_len(wrbuf);
1704 if (zebra_maps_is_complete (p->zebra_maps, p->reg_type))
1705 extract_add_complete_field (p);
1707 extract_add_incomplete_field(p);
1710 void extract_schema_add (struct recExtractCtrl *p, Odr_oid *oid)
1712 ZebraHandle zh = (ZebraHandle) (p->handle);
1713 zebraExplain_addSchema (zh->reg->zei, oid);
1716 void extract_flushSortKeys (ZebraHandle zh, SYSNO sysno,
1717 int cmd, struct sortKeys *sk)
1719 SortIdx sortIdx = zh->reg->sortIdx;
1722 sortIdx_sysno (sortIdx, sysno);
1724 while (off < sk->buf_used)
1728 off += key_SU_decode(&set, sk->buf + off);
1729 off += key_SU_decode(&use, sk->buf + off);
1730 off += key_SU_decode(&slen, sk->buf + off);
1732 sortIdx_type(sortIdx, use);
1734 sortIdx_add(sortIdx, sk->buf + off, slen);
1736 sortIdx_add(sortIdx, "", 1);
1741 void encode_key_init (struct encode_info *i)
1752 char *encode_key_int (int d, char *bp)
1756 else if (d <= 16383)
1758 *bp++ = 64 + (d>>8);
1761 else if (d <= 4194303)
1763 *bp++ = 128 + (d>>16);
1764 *bp++ = (d>>8) & 255;
1769 *bp++ = 192 + (d>>24);
1770 *bp++ = (d>>16) & 255;
1771 *bp++ = (d>>8) & 255;
1779 /* this is the old encode_key_write
1780 * may be deleted once we are confident that the new works
1783 void encode_key_write (char *k, struct encode_info *i, FILE *outf)
1788 while ((*bp++ = *k++))
1790 memcpy (&key, k+1, sizeof(struct it_key));
1791 bp = encode_key_int ( (key.sysno - i->sysno) * 2 + *k, bp);
1792 if (i->sysno != key.sysno)
1794 i->sysno = key.sysno;
1797 else if (!i->seqno && !key.seqno && i->cmd == *k)
1799 bp = encode_key_int (key.seqno - i->seqno, bp);
1800 i->seqno = key.seqno;
1802 if (fwrite (i->buf, bp - i->buf, 1, outf) != 1)
1804 logf (LOG_FATAL|LOG_ERRNO, "fwrite");
1809 void encode_key_flush (struct encode_info *i, FILE *outf)
1810 { /* dummy routine */
1815 /* new encode_key_write
1816 * The idea is to buffer one more key, and compare them
1817 * If we are going to delete and insert the same key,
1818 * we may as well not bother. Should make a difference in
1819 * updates with small modifications (appending to a mbox)
1821 void encode_key_write (char *k, struct encode_info *i, FILE *outf)
1826 if (*k) /* first time for new key */
1829 while ((*bp++ = *k++))
1831 i->keylen= bp - i->buf -1;
1832 assert(i->keylen+1+sizeof(struct it_key) < ENCODE_BUFLEN);
1836 bp=i->buf + i->keylen;
1841 memcpy (&key, k+1, sizeof(struct it_key));
1842 if (0==i->prevsys) /* no previous filter, fill up */
1844 i->prevsys=key.sysno;
1845 i->prevseq=key.seqno;
1848 else if ( (i->prevsys==key.sysno) &&
1849 (i->prevseq==key.seqno) &&
1851 { /* same numbers, diff cmd, they cancel out */
1855 { /* different stuff, write previous, move buf */
1856 bp = encode_key_int ( (i->prevsys - i->sysno) * 2 + i->prevcmd, bp);
1857 if (i->sysno != i->prevsys)
1859 i->sysno = i->prevsys;
1862 else if (!i->seqno && !i->prevseq && i->cmd == i->prevcmd)
1864 return; /* ??? Filters some sort of duplicates away */
1865 /* ??? Can this ever happen -H 15oct02 */
1867 bp = encode_key_int (i->prevseq - i->seqno, bp);
1868 i->seqno = i->prevseq;
1869 i->cmd = i->prevcmd;
1870 if (fwrite (i->buf, bp - i->buf, 1, outf) != 1)
1872 logf (LOG_FATAL|LOG_ERRNO, "fwrite");
1875 i->keylen=0; /* ok, it's written, forget it */
1876 i->prevsys=key.sysno;
1877 i->prevseq=key.seqno;
1882 void encode_key_flush (struct encode_info *i, FILE *outf)
1883 { /* flush the last key from i */
1884 char *bp =i->buf + i->keylen;
1887 return; /* nothing to flush */
1890 bp = encode_key_int ( (i->prevsys - i->sysno) * 2 + i->prevcmd, bp);
1891 if (i->sysno != i->prevsys)
1893 i->sysno = i->prevsys;
1896 else if (!i->seqno && !i->prevseq && i->cmd == i->prevcmd)
1898 return; /* ??? Filters some sort of duplicates away */
1899 /* ??? Can this ever happen -H 15oct02 */
1901 bp = encode_key_int (i->prevseq - i->seqno, bp);
1902 i->seqno = i->prevseq;
1903 i->cmd = i->prevcmd;
1904 if (fwrite (i->buf, bp - i->buf, 1, outf) != 1)
1906 logf (LOG_FATAL|LOG_ERRNO, "fwrite");
1909 i->keylen=0; /* ok, it's written, forget it */
1910 i->prevsys=0; /* forget the values too */