2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.21 1995-11-01 16:25:52 quinn
8 * *** empty log message ***
10 * Revision 1.20 1995/10/27 14:00:12 adam
11 * Implemented detection of database availability.
13 * Revision 1.19 1995/10/17 18:02:11 adam
14 * New feature: databases. Implemented as prefix to words in dictionary.
16 * Revision 1.18 1995/10/16 14:03:09 quinn
17 * Changes to support element set names and espec1
19 * Revision 1.17 1995/10/16 09:32:40 adam
20 * More work on relational op.
22 * Revision 1.16 1995/10/13 12:26:44 adam
23 * Optimization of truncation.
25 * Revision 1.15 1995/10/12 12:40:55 adam
26 * Bug fixes in rpn_prox.
28 * Revision 1.14 1995/10/09 16:18:37 adam
29 * Function dict_lookup_grep got extra client data parameter.
31 * Revision 1.13 1995/10/06 14:38:00 adam
32 * New result set method: r_score.
33 * Local no (sysno) and score is transferred to retrieveCtrl.
35 * Revision 1.12 1995/10/06 13:52:06 adam
36 * Bug fixes. Handler may abort further scanning.
38 * Revision 1.11 1995/10/06 10:43:57 adam
39 * Scan added. 'occurrences' in scan entries not set yet.
41 * Revision 1.10 1995/10/02 16:43:32 quinn
42 * Set default resulting record type in fetch.
44 * Revision 1.9 1995/10/02 15:18:52 adam
45 * New member in recRetrieveCtrl: diagnostic.
47 * Revision 1.8 1995/09/28 09:19:47 adam
48 * xfree/xmalloc used everywhere.
49 * Extract/retrieve method seems to work for text records.
51 * Revision 1.7 1995/09/27 16:17:32 adam
52 * More work on retrieve.
54 * Revision 1.6 1995/09/08 08:53:22 adam
55 * Record buffer maintained in server_info.
57 * Revision 1.5 1995/09/06 16:11:18 adam
58 * Option: only one word key per file.
60 * Revision 1.4 1995/09/06 10:33:04 adam
61 * More work on present. Some log messages removed.
63 * Revision 1.3 1995/09/05 15:28:40 adam
64 * More work on search engine.
66 * Revision 1.2 1995/09/04 12:33:43 adam
67 * Various cleanup. YAZ util used instead.
69 * Revision 1.1 1995/09/04 09:10:41 adam
70 * More work on index add/del/update.
71 * Merge sort implemented.
72 * Initial work on z39 server.
86 ZServerInfo server_info;
88 bend_initresult *bend_init (bend_initrequest *q)
90 static bend_initresult r;
91 static char *name = "zserver";
97 logf (LOG_DEBUG, "bend_init");
98 data1_tabpath = res_get(common_resource, "data1_tabpath");
99 server_info.sets = NULL;
100 if (!(server_info.sys_idx_fd = open (FNAME_SYS_IDX, O_RDONLY)))
102 logf (LOG_WARN|LOG_ERRNO, "sys_idx open fail");
104 r.errstring = "sys_idx open fail";
107 if (!(server_info.fileDict = dict_open (FNAME_FILE_DICT, 10, 0)))
109 logf (LOG_WARN, "dict_open fail: fname dict");
111 r.errstring = "dict_open fail: fname dict";
114 if (!(server_info.wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
116 logf (LOG_WARN, "dict_open fail: word dict");
117 dict_close (server_info.fileDict);
119 r.errstring = "dict_open fail: word dict";
122 if (!(server_info.wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
123 sizeof (struct it_key))))
125 logf (LOG_WARN, "is_open fail: word isam");
126 dict_close (server_info.wordDict);
127 dict_close (server_info.fileDict);
129 r.errstring = "is_open fail: word isam";
132 server_info.odr = odr_createmem (ODR_ENCODE);
136 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
138 static bend_searchresult r;
144 odr_reset (server_info.odr);
145 server_info.errCode = 0;
146 server_info.errString = NULL;
147 switch (q->query->which)
150 r.errcode = rpn_search (&server_info, q->query->u.type_1,
151 q->num_bases, q->basenames, q->setname,
153 r.errstring = server_info.errString;
161 static int record_read (int fd, char *buf, size_t count)
163 return read (fd, buf, count);
166 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
167 oid_value input_format, Z_RecordComposition *comp,
168 oid_value *output_format, char **rec_bufp,
171 char record_info[SYS_IDX_ENTRY_LEN];
172 char *fname, *file_type;
174 struct recRetrieveCtrl retrieveCtrl;
176 if (lseek (zi->sys_idx_fd, sysno * SYS_IDX_ENTRY_LEN,
179 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: lseek of sys_idx");
182 if (read (zi->sys_idx_fd, record_info, SYS_IDX_ENTRY_LEN) == -1)
184 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: read of sys_idx");
187 file_type = record_info;
188 fname = record_info + strlen(record_info) + 1;
189 if (!(rt = recType_byName (file_type)))
191 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
195 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
196 if ((retrieveCtrl.fd = open (fname, O_RDONLY)) == -1)
198 char *msg = "Record doesn't exist";
199 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
200 *output_format = VAL_SUTRS;
202 *rec_lenp = strlen (msg);
203 return 0; /* or 14: System error in presenting records */
205 retrieveCtrl.localno = sysno;
206 retrieveCtrl.score = score;
207 retrieveCtrl.odr = stream;
208 retrieveCtrl.readf = record_read;
209 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
210 retrieveCtrl.comp = comp;
211 retrieveCtrl.diagnostic = 0;
212 (*rt->retrieve)(&retrieveCtrl);
213 *output_format = retrieveCtrl.output_format;
214 *rec_bufp = retrieveCtrl.rec_buf;
215 *rec_lenp = retrieveCtrl.rec_len;
216 close (retrieveCtrl.fd);
217 return retrieveCtrl.diagnostic;
220 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
222 static bend_fetchresult r;
224 ZServerSetSysno *records;
230 odr_reset (server_info.odr);
231 server_info.errCode = 0;
233 positions[0] = q->number;
234 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
237 logf (LOG_DEBUG, "resultSetRecordGet, error");
241 if (!records[0].sysno)
244 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
247 r.errcode = record_fetch (&server_info, records[0].sysno,
248 records[0].score, q->stream, q->format,
249 q->comp, &r.format, &r.record, &r.len);
250 resultSetSysnoDel (&server_info, records, 1);
254 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
259 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
261 static bend_scanresult r;
264 odr_reset (server_info.odr);
265 server_info.errCode = 0;
266 server_info.errString = 0;
268 r.term_position = q->term_position;
269 r.num_entries = q->num_entries;
270 r.errcode = rpn_scan (&server_info, q->term,
271 q->num_bases, q->basenames,
273 &r.num_entries, &r.entries, &status);
274 r.errstring = server_info.errString;
279 void bend_close (void *handle)
281 dict_close (server_info.fileDict);
282 dict_close (server_info.wordDict);
283 is_close (server_info.wordIsam);
284 close (server_info.sys_idx_fd);
288 int main (int argc, char **argv)
290 char *base_name = "base";
292 if (!(common_resource = res_open (base_name)))
294 logf (LOG_FATAL, "Cannot open resource `%s'", base_name);
297 return statserv_main (argc, argv);