2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.19 1995-10-17 18:02:11 adam
8 * New feature: databases. Implemented as prefix to words in dictionary.
10 * Revision 1.18 1995/10/16 14:03:09 quinn
11 * Changes to support element set names and espec1
13 * Revision 1.17 1995/10/16 09:32:40 adam
14 * More work on relational op.
16 * Revision 1.16 1995/10/13 12:26:44 adam
17 * Optimization of truncation.
19 * Revision 1.15 1995/10/12 12:40:55 adam
20 * Bug fixes in rpn_prox.
22 * Revision 1.14 1995/10/09 16:18:37 adam
23 * Function dict_lookup_grep got extra client data parameter.
25 * Revision 1.13 1995/10/06 14:38:00 adam
26 * New result set method: r_score.
27 * Local no (sysno) and score is transferred to retrieveCtrl.
29 * Revision 1.12 1995/10/06 13:52:06 adam
30 * Bug fixes. Handler may abort further scanning.
32 * Revision 1.11 1995/10/06 10:43:57 adam
33 * Scan added. 'occurrences' in scan entries not set yet.
35 * Revision 1.10 1995/10/02 16:43:32 quinn
36 * Set default resulting record type in fetch.
38 * Revision 1.9 1995/10/02 15:18:52 adam
39 * New member in recRetrieveCtrl: diagnostic.
41 * Revision 1.8 1995/09/28 09:19:47 adam
42 * xfree/xmalloc used everywhere.
43 * Extract/retrieve method seems to work for text records.
45 * Revision 1.7 1995/09/27 16:17:32 adam
46 * More work on retrieve.
48 * Revision 1.6 1995/09/08 08:53:22 adam
49 * Record buffer maintained in server_info.
51 * Revision 1.5 1995/09/06 16:11:18 adam
52 * Option: only one word key per file.
54 * Revision 1.4 1995/09/06 10:33:04 adam
55 * More work on present. Some log messages removed.
57 * Revision 1.3 1995/09/05 15:28:40 adam
58 * More work on search engine.
60 * Revision 1.2 1995/09/04 12:33:43 adam
61 * Various cleanup. YAZ util used instead.
63 * Revision 1.1 1995/09/04 09:10:41 adam
64 * More work on index add/del/update.
65 * Merge sort implemented.
66 * Initial work on z39 server.
78 ZServerInfo server_info;
80 bend_initresult *bend_init (bend_initrequest *q)
82 static bend_initresult r;
83 static char *name = "zserver";
89 logf (LOG_DEBUG, "bend_init");
90 server_info.sets = NULL;
91 if (!(server_info.sys_idx_fd = open (FNAME_SYS_IDX, O_RDONLY)))
93 logf (LOG_WARN|LOG_ERRNO, "sys_idx open fail");
95 r.errstring = "sys_idx open fail";
98 if (!(server_info.fileDict = dict_open (FNAME_FILE_DICT, 10, 0)))
100 logf (LOG_WARN, "dict_open fail: fname dict");
102 r.errstring = "dict_open fail: fname dict";
105 if (!(server_info.wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
107 logf (LOG_WARN, "dict_open fail: word dict");
108 dict_close (server_info.fileDict);
110 r.errstring = "dict_open fail: word dict";
113 if (!(server_info.wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
114 sizeof (struct it_key))))
116 logf (LOG_WARN, "is_open fail: word isam");
117 dict_close (server_info.wordDict);
118 dict_close (server_info.fileDict);
120 r.errstring = "is_open fail: word isam";
123 server_info.odr = odr_createmem (ODR_ENCODE);
127 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
129 static bend_searchresult r;
135 odr_reset (server_info.odr);
136 server_info.errCode = 0;
137 switch (q->query->which)
140 r.errcode = rpn_search (&server_info, q->query->u.type_1,
141 q->num_bases, q->basenames, q->setname,
150 static int record_read (int fd, char *buf, size_t count)
152 return read (fd, buf, count);
155 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
156 oid_value input_format, Z_RecordComposition *comp,
157 oid_value *output_format, char **rec_bufp,
160 char record_info[SYS_IDX_ENTRY_LEN];
161 char *fname, *file_type;
163 struct recRetrieveCtrl retrieveCtrl;
165 if (lseek (zi->sys_idx_fd, sysno * SYS_IDX_ENTRY_LEN,
168 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: lseek of sys_idx");
171 if (read (zi->sys_idx_fd, record_info, SYS_IDX_ENTRY_LEN) == -1)
173 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: read of sys_idx");
176 file_type = record_info;
177 fname = record_info + strlen(record_info) + 1;
178 if (!(rt = recType_byName (file_type)))
180 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
184 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
185 if ((retrieveCtrl.fd = open (fname, O_RDONLY)) == -1)
187 char *msg = "Record doesn't exist";
188 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
189 *output_format = VAL_SUTRS;
191 *rec_lenp = strlen (msg);
192 return 0; /* or 14: System error in presenting records */
194 retrieveCtrl.localno = sysno;
195 retrieveCtrl.score = score;
196 retrieveCtrl.odr = stream;
197 retrieveCtrl.readf = record_read;
198 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
199 retrieveCtrl.comp = comp;
200 retrieveCtrl.diagnostic = 0;
201 (*rt->retrieve)(&retrieveCtrl);
202 *output_format = retrieveCtrl.output_format;
203 *rec_bufp = retrieveCtrl.rec_buf;
204 *rec_lenp = retrieveCtrl.rec_len;
205 close (retrieveCtrl.fd);
206 return retrieveCtrl.diagnostic;
209 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
211 static bend_fetchresult r;
213 ZServerSetSysno *records;
219 odr_reset (server_info.odr);
220 server_info.errCode = 0;
222 positions[0] = q->number;
223 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
226 logf (LOG_DEBUG, "resultSetRecordGet, error");
230 if (!records[0].sysno)
233 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
236 r.errcode = record_fetch (&server_info, records[0].sysno,
237 records[0].score, q->stream, q->format,
238 q->comp, &r.format, &r.record, &r.len);
239 resultSetSysnoDel (&server_info, records, 1);
243 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
248 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
250 static bend_scanresult r;
253 odr_reset (server_info.odr);
254 server_info.errCode = 0;
257 r.term_position = q->term_position;
258 r.num_entries = q->num_entries;
259 r.errcode = rpn_scan (&server_info, server_info.odr, q->term,
260 q->num_bases, q->basenames,
262 &r.num_entries, &r.entries, &status);
267 void bend_close (void *handle)
269 dict_close (server_info.fileDict);
270 dict_close (server_info.wordDict);
271 is_close (server_info.wordIsam);
272 close (server_info.sys_idx_fd);
276 int main (int argc, char **argv)
278 char *base_name = "base";
280 if (!(common_resource = res_open (base_name)))
282 logf (LOG_FATAL, "Cannot open resource `%s'", base_name);
285 return statserv_main (argc, argv);