2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.18 1995-10-16 14:03:09 quinn
8 * Changes to support element set names and espec1
10 * Revision 1.17 1995/10/16 09:32:40 adam
11 * More work on relational op.
13 * Revision 1.16 1995/10/13 12:26:44 adam
14 * Optimization of truncation.
16 * Revision 1.15 1995/10/12 12:40:55 adam
17 * Bug fixes in rpn_prox.
19 * Revision 1.14 1995/10/09 16:18:37 adam
20 * Function dict_lookup_grep got extra client data parameter.
22 * Revision 1.13 1995/10/06 14:38:00 adam
23 * New result set method: r_score.
24 * Local no (sysno) and score is transferred to retrieveCtrl.
26 * Revision 1.12 1995/10/06 13:52:06 adam
27 * Bug fixes. Handler may abort further scanning.
29 * Revision 1.11 1995/10/06 10:43:57 adam
30 * Scan added. 'occurrences' in scan entries not set yet.
32 * Revision 1.10 1995/10/02 16:43:32 quinn
33 * Set default resulting record type in fetch.
35 * Revision 1.9 1995/10/02 15:18:52 adam
36 * New member in recRetrieveCtrl: diagnostic.
38 * Revision 1.8 1995/09/28 09:19:47 adam
39 * xfree/xmalloc used everywhere.
40 * Extract/retrieve method seems to work for text records.
42 * Revision 1.7 1995/09/27 16:17:32 adam
43 * More work on retrieve.
45 * Revision 1.6 1995/09/08 08:53:22 adam
46 * Record buffer maintained in server_info.
48 * Revision 1.5 1995/09/06 16:11:18 adam
49 * Option: only one word key per file.
51 * Revision 1.4 1995/09/06 10:33:04 adam
52 * More work on present. Some log messages removed.
54 * Revision 1.3 1995/09/05 15:28:40 adam
55 * More work on search engine.
57 * Revision 1.2 1995/09/04 12:33:43 adam
58 * Various cleanup. YAZ util used instead.
60 * Revision 1.1 1995/09/04 09:10:41 adam
61 * More work on index add/del/update.
62 * Merge sort implemented.
63 * Initial work on z39 server.
75 ZServerInfo server_info;
77 bend_initresult *bend_init (bend_initrequest *q)
79 static bend_initresult r;
80 static char *name = "zserver";
86 logf (LOG_DEBUG, "bend_init");
87 server_info.sets = NULL;
88 if (!(server_info.sys_idx_fd = open (FNAME_SYS_IDX, O_RDONLY)))
90 logf (LOG_WARN|LOG_ERRNO, "sys_idx open fail");
92 r.errstring = "sys_idx open fail";
95 if (!(server_info.fileDict = dict_open (FNAME_FILE_DICT, 10, 0)))
97 logf (LOG_WARN, "dict_open fail: fname dict");
99 r.errstring = "dict_open fail: fname dict";
102 if (!(server_info.wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
104 logf (LOG_WARN, "dict_open fail: word dict");
105 dict_close (server_info.fileDict);
107 r.errstring = "dict_open fail: word dict";
110 if (!(server_info.wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
111 sizeof (struct it_key))))
113 logf (LOG_WARN, "is_open fail: word isam");
114 dict_close (server_info.wordDict);
115 dict_close (server_info.fileDict);
117 r.errstring = "is_open fail: word isam";
120 server_info.odr = odr_createmem (ODR_ENCODE);
124 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
126 static bend_searchresult r;
132 odr_reset (server_info.odr);
133 server_info.errCode = 0;
134 switch (q->query->which)
137 r.errcode = rpn_search (&server_info, q->query->u.type_1,
138 q->num_bases, q->basenames, q->setname,
147 static int record_read (int fd, char *buf, size_t count)
149 return read (fd, buf, count);
152 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
153 oid_value input_format, Z_RecordComposition *comp,
154 oid_value *output_format, char **rec_bufp,
157 char record_info[SYS_IDX_ENTRY_LEN];
158 char *fname, *file_type;
160 struct recRetrieveCtrl retrieveCtrl;
162 if (lseek (zi->sys_idx_fd, sysno * SYS_IDX_ENTRY_LEN,
165 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: lseek of sys_idx");
168 if (read (zi->sys_idx_fd, record_info, SYS_IDX_ENTRY_LEN) == -1)
170 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: read of sys_idx");
173 file_type = record_info;
174 fname = record_info + strlen(record_info) + 1;
175 if (!(rt = recType_byName (file_type)))
177 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
181 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
182 if ((retrieveCtrl.fd = open (fname, O_RDONLY)) == -1)
184 char *msg = "Record doesn't exist";
185 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
186 *output_format = VAL_SUTRS;
188 *rec_lenp = strlen (msg);
189 return 0; /* or 14: System error in presenting records */
191 retrieveCtrl.localno = sysno;
192 retrieveCtrl.score = score;
193 retrieveCtrl.odr = stream;
194 retrieveCtrl.readf = record_read;
195 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
196 retrieveCtrl.comp = comp;
197 retrieveCtrl.diagnostic = 0;
198 (*rt->retrieve)(&retrieveCtrl);
199 *output_format = retrieveCtrl.output_format;
200 *rec_bufp = retrieveCtrl.rec_buf;
201 *rec_lenp = retrieveCtrl.rec_len;
202 close (retrieveCtrl.fd);
203 return retrieveCtrl.diagnostic;
206 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
208 static bend_fetchresult r;
210 ZServerSetSysno *records;
216 odr_reset (server_info.odr);
217 server_info.errCode = 0;
219 positions[0] = q->number;
220 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
223 logf (LOG_DEBUG, "resultSetRecordGet, error");
227 if (!records[0].sysno)
230 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
233 r.errcode = record_fetch (&server_info, records[0].sysno,
234 records[0].score, q->stream,
235 q->format, q->comp, &r.format, &r.record, &r.len);
239 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
244 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
246 static bend_scanresult r;
249 odr_reset (server_info.odr);
250 server_info.errCode = 0;
253 r.term_position = q->term_position;
254 r.num_entries = q->num_entries;
255 r.errcode = rpn_scan (&server_info, server_info.odr, q->term,
257 &r.num_entries, &r.entries, &status);
262 void bend_close (void *handle)
264 dict_close (server_info.fileDict);
265 dict_close (server_info.wordDict);
266 is_close (server_info.wordIsam);
267 close (server_info.sys_idx_fd);
271 int main (int argc, char **argv)
273 char *base_name = "base";
275 if (!(common_resource = res_open (base_name)))
277 logf (LOG_FATAL, "Cannot open resource `%s'", base_name);
280 return statserv_main (argc, argv);