2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.20 1995-10-27 14:00:12 adam
8 * Implemented detection of database availability.
10 * Revision 1.19 1995/10/17 18:02:11 adam
11 * New feature: databases. Implemented as prefix to words in dictionary.
13 * Revision 1.18 1995/10/16 14:03:09 quinn
14 * Changes to support element set names and espec1
16 * Revision 1.17 1995/10/16 09:32:40 adam
17 * More work on relational op.
19 * Revision 1.16 1995/10/13 12:26:44 adam
20 * Optimization of truncation.
22 * Revision 1.15 1995/10/12 12:40:55 adam
23 * Bug fixes in rpn_prox.
25 * Revision 1.14 1995/10/09 16:18:37 adam
26 * Function dict_lookup_grep got extra client data parameter.
28 * Revision 1.13 1995/10/06 14:38:00 adam
29 * New result set method: r_score.
30 * Local no (sysno) and score is transferred to retrieveCtrl.
32 * Revision 1.12 1995/10/06 13:52:06 adam
33 * Bug fixes. Handler may abort further scanning.
35 * Revision 1.11 1995/10/06 10:43:57 adam
36 * Scan added. 'occurrences' in scan entries not set yet.
38 * Revision 1.10 1995/10/02 16:43:32 quinn
39 * Set default resulting record type in fetch.
41 * Revision 1.9 1995/10/02 15:18:52 adam
42 * New member in recRetrieveCtrl: diagnostic.
44 * Revision 1.8 1995/09/28 09:19:47 adam
45 * xfree/xmalloc used everywhere.
46 * Extract/retrieve method seems to work for text records.
48 * Revision 1.7 1995/09/27 16:17:32 adam
49 * More work on retrieve.
51 * Revision 1.6 1995/09/08 08:53:22 adam
52 * Record buffer maintained in server_info.
54 * Revision 1.5 1995/09/06 16:11:18 adam
55 * Option: only one word key per file.
57 * Revision 1.4 1995/09/06 10:33:04 adam
58 * More work on present. Some log messages removed.
60 * Revision 1.3 1995/09/05 15:28:40 adam
61 * More work on search engine.
63 * Revision 1.2 1995/09/04 12:33:43 adam
64 * Various cleanup. YAZ util used instead.
66 * Revision 1.1 1995/09/04 09:10:41 adam
67 * More work on index add/del/update.
68 * Merge sort implemented.
69 * Initial work on z39 server.
81 ZServerInfo server_info;
83 bend_initresult *bend_init (bend_initrequest *q)
85 static bend_initresult r;
86 static char *name = "zserver";
92 logf (LOG_DEBUG, "bend_init");
93 server_info.sets = NULL;
94 if (!(server_info.sys_idx_fd = open (FNAME_SYS_IDX, O_RDONLY)))
96 logf (LOG_WARN|LOG_ERRNO, "sys_idx open fail");
98 r.errstring = "sys_idx open fail";
101 if (!(server_info.fileDict = dict_open (FNAME_FILE_DICT, 10, 0)))
103 logf (LOG_WARN, "dict_open fail: fname dict");
105 r.errstring = "dict_open fail: fname dict";
108 if (!(server_info.wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
110 logf (LOG_WARN, "dict_open fail: word dict");
111 dict_close (server_info.fileDict);
113 r.errstring = "dict_open fail: word dict";
116 if (!(server_info.wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
117 sizeof (struct it_key))))
119 logf (LOG_WARN, "is_open fail: word isam");
120 dict_close (server_info.wordDict);
121 dict_close (server_info.fileDict);
123 r.errstring = "is_open fail: word isam";
126 server_info.odr = odr_createmem (ODR_ENCODE);
130 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
132 static bend_searchresult r;
138 odr_reset (server_info.odr);
139 server_info.errCode = 0;
140 server_info.errString = NULL;
141 switch (q->query->which)
144 r.errcode = rpn_search (&server_info, q->query->u.type_1,
145 q->num_bases, q->basenames, q->setname,
147 r.errstring = server_info.errString;
155 static int record_read (int fd, char *buf, size_t count)
157 return read (fd, buf, count);
160 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
161 oid_value input_format, Z_RecordComposition *comp,
162 oid_value *output_format, char **rec_bufp,
165 char record_info[SYS_IDX_ENTRY_LEN];
166 char *fname, *file_type;
168 struct recRetrieveCtrl retrieveCtrl;
170 if (lseek (zi->sys_idx_fd, sysno * SYS_IDX_ENTRY_LEN,
173 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: lseek of sys_idx");
176 if (read (zi->sys_idx_fd, record_info, SYS_IDX_ENTRY_LEN) == -1)
178 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: read of sys_idx");
181 file_type = record_info;
182 fname = record_info + strlen(record_info) + 1;
183 if (!(rt = recType_byName (file_type)))
185 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
189 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
190 if ((retrieveCtrl.fd = open (fname, O_RDONLY)) == -1)
192 char *msg = "Record doesn't exist";
193 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
194 *output_format = VAL_SUTRS;
196 *rec_lenp = strlen (msg);
197 return 0; /* or 14: System error in presenting records */
199 retrieveCtrl.localno = sysno;
200 retrieveCtrl.score = score;
201 retrieveCtrl.odr = stream;
202 retrieveCtrl.readf = record_read;
203 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
204 retrieveCtrl.comp = comp;
205 retrieveCtrl.diagnostic = 0;
206 (*rt->retrieve)(&retrieveCtrl);
207 *output_format = retrieveCtrl.output_format;
208 *rec_bufp = retrieveCtrl.rec_buf;
209 *rec_lenp = retrieveCtrl.rec_len;
210 close (retrieveCtrl.fd);
211 return retrieveCtrl.diagnostic;
214 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
216 static bend_fetchresult r;
218 ZServerSetSysno *records;
224 odr_reset (server_info.odr);
225 server_info.errCode = 0;
227 positions[0] = q->number;
228 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
231 logf (LOG_DEBUG, "resultSetRecordGet, error");
235 if (!records[0].sysno)
238 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
241 r.errcode = record_fetch (&server_info, records[0].sysno,
242 records[0].score, q->stream, q->format,
243 q->comp, &r.format, &r.record, &r.len);
244 resultSetSysnoDel (&server_info, records, 1);
248 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
253 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
255 static bend_scanresult r;
258 odr_reset (server_info.odr);
259 server_info.errCode = 0;
260 server_info.errString = 0;
262 r.term_position = q->term_position;
263 r.num_entries = q->num_entries;
264 r.errcode = rpn_scan (&server_info, q->term,
265 q->num_bases, q->basenames,
267 &r.num_entries, &r.entries, &status);
268 r.errstring = server_info.errString;
273 void bend_close (void *handle)
275 dict_close (server_info.fileDict);
276 dict_close (server_info.wordDict);
277 is_close (server_info.wordIsam);
278 close (server_info.sys_idx_fd);
282 int main (int argc, char **argv)
284 char *base_name = "base";
286 if (!(common_resource = res_open (base_name)))
288 logf (LOG_FATAL, "Cannot open resource `%s'", base_name);
291 return statserv_main (argc, argv);