1 /* Gateway kernel - Z39.50 Persistence
5 * Revision 1.3 1995/04/19 13:19:09 adam
6 * New command: account - for authentication.
8 * Revision 1.2 1995/04/19 10:46:19 adam
9 * Persistency works much better now. New command: status - history-like
11 * Revision 1.1 1995/04/19 07:31:10 adam
12 * First work on Z39.50 persistence.
26 static int fgetsx (char *buf, int size, FILE *inf)
30 if (!fgets (buf, size, inf))
32 if ((cp = strchr (buf, '\n')))
37 static int set_change;
39 static int obtain_set (ZASS zass, struct gw_user_set *set)
41 const struct zass_searchent *p;
43 p = zass_search (zass, set->rpn, set->name, set->database);
48 if (p->num != set->hits)
50 set->present_flag = 1;
52 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Set %s researched", set->name);
56 static int obtain_sets (ZASS zass, struct ccl_rpn_node *rpn,
57 struct gw_user_set *sets)
59 struct gw_user_set *set;
68 if ((r=obtain_sets (zass, rpn->u.p[0], sets)))
70 return obtain_sets (zass, rpn->u.p[1], sets);
74 set = user_set_search (rpn->u.setname);
77 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Set %s not there at all",
81 if (set->present_flag)
83 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Set %s already there",
88 return obtain_set (zass, set);
91 const struct zass_searchent *zass_p_search (ZASS zass,
92 struct ccl_rpn_node *rpn,
93 const char *result_set,
95 struct gw_user_set *sets)
100 r = obtain_sets (zass, rpn, sets);
103 return zass_search (zass, rpn, (char*) result_set, (char*) database);
106 const struct zass_presentent *zass_p_present (ZASS zass,
107 const char *result_set, int offset, int number)
109 struct gw_user_set *set;
111 set = user_set_search (result_set);
114 if (!set->present_flag)
116 const struct zass_searchent *p;
118 p = zass_p_search (zass, set->rpn, result_set, set->database,
123 return zass_present (zass, (char*) result_set, offset, number);
126 struct ccl_rpn_node *load_rpn (char *buf, FILE *inf)
128 struct ccl_rpn_node *rpn;
129 struct ccl_rpn_attr **attrp;
130 int type, value, no_read;
133 if (!fgetsx (buf, 1024, inf))
138 rpn = malloc (sizeof (*rpn));
141 rpn->kind = CCL_RPN_AND;
142 rpn->u.p[0] = load_rpn (buf, inf);
143 rpn->u.p[1] = load_rpn (buf, inf);
146 rpn = malloc (sizeof (*rpn));
149 rpn->kind = CCL_RPN_OR;
150 rpn->u.p[0] = load_rpn (buf, inf);
151 rpn->u.p[1] = load_rpn (buf, inf);
154 rpn = malloc (sizeof (*rpn));
157 rpn->kind = CCL_RPN_NOT;
158 rpn->u.p[0] = load_rpn (buf, inf);
159 rpn->u.p[1] = load_rpn (buf, inf);
162 rpn = malloc (sizeof (*rpn));
165 rpn->kind = CCL_RPN_PROX;
166 rpn->u.p[0] = load_rpn (buf, inf);
167 rpn->u.p[1] = load_rpn (buf, inf);
170 rpn = malloc (sizeof (*rpn));
173 rpn->kind = CCL_RPN_TERM;
175 rpn->u.t.term = gw_strdup (buf+2);
176 attrp = &rpn->u.t.attr_list;
177 if (!fgetsx (buf, 1024, inf))
180 while (sscanf (cp, "%d %d%n", &type, &value, &no_read) > 1)
182 *attrp = malloc (sizeof(**attrp));
183 (*attrp)->type = type;
184 (*attrp)->value = value;
185 attrp = &(*attrp)->next;
191 rpn = malloc (sizeof (*rpn));
194 rpn->kind = CCL_RPN_SET;
195 rpn->u.setname = gw_strdup (buf+2);
200 int load_p_state (int userid)
208 struct gw_user_set *set;
210 sprintf (fname, "persist.%d", userid);
212 inf = fopen (fname, "r");
215 gw_log (GW_LOG_WARN|GW_LOG_ERRNO, KERNEL_LOG,
216 "Couldn't open %s", fname);
219 gw_log (GW_LOG_DEBUG, KERNEL_LOG,
220 "Reading persistence file %s", fname);
222 if (!fgetsx (fline, 1024, inf))
224 if (sscanf (fline, "%s", info.target) != 1)
228 if (!fgetsx (fline, 1024, inf))
230 if (sscanf (fline, "%s", info.account) != 1)
231 *info.account = '\0';
233 if (!fgetsx (fline, 1024, inf))
235 free (info.database);
236 info.database = gw_strdup (fline);
238 if (!fgetsx (fline, 1024, inf))
240 if (sscanf (fline, "%d", &info.setno) != 1)
242 gw_log (GW_LOG_DEBUG, KERNEL_LOG,
243 "Reading persistence file %s (2)", fname);
245 while (fgetsx (fline, 1024, inf))
247 gw_log (GW_LOG_DEBUG, KERNEL_LOG,
248 "Reading persistence file %s (3)", fname);
249 if (sscanf (fline, "%s %d %s", resultname, &hits, database) != 3)
251 if (!fgetsx (fline, 1024, inf)) /* search string */
253 gw_log (GW_LOG_DEBUG, KERNEL_LOG,
254 "Adding %s, %d hits, database %s",
255 resultname, hits, database);
256 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Search string %s", fline);
257 set = user_set_add (resultname, hits, database, NULL, 0, fline);
258 set->rpn = load_rpn (fline, inf);
259 ccl_pr_tree (set->rpn, stderr);
260 fgetsx (fline, 1024, inf);
263 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Finished reading %s", fname);
267 static void save_rpn (struct ccl_rpn_node *rpn, FILE *of)
269 struct ccl_rpn_attr *attr;
275 save_rpn (rpn->u.p[0], of);
276 save_rpn (rpn->u.p[1], of);
280 save_rpn (rpn->u.p[0], of);
281 save_rpn (rpn->u.p[1], of);
285 save_rpn (rpn->u.p[0], of);
286 save_rpn (rpn->u.p[1], of);
290 save_rpn (rpn->u.p[0], of);
291 save_rpn (rpn->u.p[1], of);
294 fprintf (of, "T %s\n", rpn->u.t.term);
295 for (attr = rpn->u.t.attr_list; attr; attr = attr->next)
296 fprintf (of, "%d %d ", attr->type, attr->value);
300 fprintf (of, "S %s\n", rpn->u.setname);
304 static void save_sets (FILE *of, struct gw_user_set *sp)
308 save_sets (of, sp->prev);
309 fprintf (of, "%s %d %s\n%s\n", sp->name, sp->hits, sp->database,
311 save_rpn (sp->rpn, of);
315 int save_p_state (int userid)
320 sprintf (fname, "persist.%d", userid);
322 of = fopen (fname, "w");
325 gw_log (GW_LOG_WARN|GW_LOG_ERRNO, KERNEL_LOG,
326 "Couldn't open %s", fname);
329 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Writing persistence file %s", fname);
330 fprintf (of, "%s\n%s\n%s\n%d\n", info.target, info.account,
331 info.database, info.setno);
332 save_sets (of, info.sets);