1 /*
2 * SysDB - src/core/store_lookup.c
3 * Copyright (C) 2014 Sebastian 'tokkee' Harl <sh@tokkee.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
28 /*
29 * This module implements operators which may be used to select contents of
30 * the store by matching various attributes of the stored objects. For now, a
31 * simple full table scan is supported only.
32 */
34 #if HAVE_CONFIG_H
35 # include "config.h"
36 #endif /* HAVE_CONFIG_H */
38 #include "sysdb.h"
39 #include "core/store-private.h"
40 #include "core/object.h"
42 #include <assert.h>
44 #include <sys/types.h>
45 #include <regex.h>
47 #include <stdlib.h>
48 #include <string.h>
50 #include <limits.h>
52 /*
53 * private data types
54 */
56 typedef struct {
57 sdb_store_matcher_t *m;
58 sdb_store_matcher_t *filter;
59 sdb_store_lookup_cb cb;
60 void *user_data;
61 } scan_iter_data_t;
63 /*
64 * private helper functions
65 */
67 static int
68 scan_iter(sdb_store_obj_t *obj, void *user_data)
69 {
70 scan_iter_data_t *d = user_data;
72 if (sdb_store_matcher_matches(d->m, obj, d->filter))
73 return d->cb(obj, d->user_data);
74 return 0;
75 } /* scan_iter */
77 /*
78 * matcher implementations
79 */
81 static int
82 match_logical(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
83 sdb_store_matcher_t *filter)
84 {
85 int status;
87 assert((m->type == MATCHER_AND) || (m->type == MATCHER_OR));
88 assert(OP_M(m)->left && OP_M(m)->right);
90 status = sdb_store_matcher_matches(OP_M(m)->left, obj, filter);
92 /* lazy evaluation */
93 if ((! status) && (m->type == MATCHER_AND))
94 return status;
95 else if (status && (m->type == MATCHER_OR))
96 return status;
98 return sdb_store_matcher_matches(OP_M(m)->right, obj, filter);
99 } /* match_logical */
101 static int
102 match_unary(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
103 sdb_store_matcher_t *filter)
104 {
105 assert(m->type == MATCHER_NOT);
106 assert(UOP_M(m)->op);
108 return !sdb_store_matcher_matches(UOP_M(m)->op, obj, filter);
109 } /* match_unary */
111 static int
112 match_child(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
113 sdb_store_matcher_t *filter)
114 {
115 sdb_avltree_iter_t *iter = NULL;
116 int status;
117 int all = 0;
119 assert((m->type == MATCHER_SERVICE)
120 || (m->type == MATCHER_METRIC)
121 || (m->type == MATCHER_ATTRIBUTE));
123 /* TODO: support all object types */
124 if (obj->type != SDB_HOST)
125 return 0;
127 /* negated matchers should only match if the respective positive matchers
128 * do not match; that is if the negated matcher matchers *all* children */
129 if ((CHILD_M(m)->m->type == MATCHER_NE)
130 || (CHILD_M(m)->m->type == MATCHER_NREGEX))
131 all = 1;
133 if (m->type == MATCHER_SERVICE)
134 iter = sdb_avltree_get_iter(HOST(obj)->services);
135 else if (m->type == MATCHER_METRIC)
136 iter = sdb_avltree_get_iter(HOST(obj)->metrics);
137 else if (m->type == MATCHER_ATTRIBUTE)
138 iter = sdb_avltree_get_iter(HOST(obj)->attributes);
140 status = all;
141 while (sdb_avltree_iter_has_next(iter)) {
142 sdb_store_obj_t *child = STORE_OBJ(sdb_avltree_iter_get_next(iter));
143 if (filter && (! sdb_store_matcher_matches(filter, child, NULL)))
144 continue;
146 if (sdb_store_matcher_matches(CHILD_M(m)->m, child, filter)) {
147 if (! all) {
148 status = 1;
149 break;
150 }
151 } else if (all) {
152 status = 0;
153 break;
154 }
155 }
156 sdb_avltree_iter_destroy(iter);
157 return status;
158 } /* match_child */
160 /*
161 * cmp_expr:
162 * Compare the values of two expressions when evaluating them using the
163 * specified stored object and filter. Returns a value less than, equal to, or
164 * greater than zero if the value of the first expression compares less than,
165 * equal to, or greater than the value of the second expression. Returns
166 * INT_MAX if any of the expressions could not be evaluated or if any of them
167 * evaluated to NULL.
168 */
169 static int
170 cmp_expr(sdb_store_expr_t *e1, sdb_store_expr_t *e2,
171 sdb_store_obj_t *obj, sdb_store_matcher_t *filter)
172 {
173 sdb_data_t v1 = SDB_DATA_INIT, v2 = SDB_DATA_INIT;
174 int status;
176 if (sdb_store_expr_eval(e1, obj, &v1, filter))
177 return INT_MAX;
178 if (sdb_store_expr_eval(e2, obj, &v2, filter)) {
179 sdb_data_free_datum(&v1);
180 return INT_MAX;
181 }
183 if (sdb_data_isnull(&v1) || (sdb_data_isnull(&v2)))
184 status = INT_MAX;
185 else if (v1.type == v2.type)
186 status = sdb_data_cmp(&v1, &v2);
187 else
188 status = sdb_data_strcmp(&v1, &v2);
190 sdb_data_free_datum(&v1);
191 sdb_data_free_datum(&v2);
192 return status;
193 } /* cmp_expr */
195 static int
196 match_lt(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
197 sdb_store_matcher_t *filter)
198 {
199 int status;
200 assert(m->type == MATCHER_LT);
201 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
202 return (status != INT_MAX) && (status < 0);
203 } /* match_lt */
205 static int
206 match_le(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
207 sdb_store_matcher_t *filter)
208 {
209 int status;
210 assert(m->type == MATCHER_LE);
211 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
212 return (status != INT_MAX) && (status <= 0);
213 } /* match_le */
215 static int
216 match_eq(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
217 sdb_store_matcher_t *filter)
218 {
219 int status;
220 assert(m->type == MATCHER_EQ);
221 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
222 return (status != INT_MAX) && (! status);
223 } /* match_eq */
225 static int
226 match_ne(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
227 sdb_store_matcher_t *filter)
228 {
229 int status;
230 assert(m->type == MATCHER_NE);
231 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
232 return (status != INT_MAX) && status;
233 } /* match_ne */
235 static int
236 match_ge(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
237 sdb_store_matcher_t *filter)
238 {
239 int status;
240 assert(m->type == MATCHER_GE);
241 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
242 return (status != INT_MAX) && (status >= 0);
243 } /* match_ge */
245 static int
246 match_gt(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
247 sdb_store_matcher_t *filter)
248 {
249 int status;
250 assert(m->type == MATCHER_GT);
251 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
252 return (status != INT_MAX) && (status > 0);
253 } /* match_gt */
255 static int
256 match_in(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
257 sdb_store_matcher_t *filter)
258 {
259 sdb_data_t value = SDB_DATA_INIT, array = SDB_DATA_INIT;
260 int status = 1;
262 assert(m->type == MATCHER_IN);
264 if ((sdb_store_expr_eval(CMP_M(m)->left, obj, &value, filter))
265 || (sdb_store_expr_eval(CMP_M(m)->right, obj, &array, filter)))
266 status = 0;
268 if (status)
269 status = sdb_data_inarray(&value, &array);
271 sdb_data_free_datum(&value);
272 sdb_data_free_datum(&array);
273 return status;
274 } /* match_in */
276 static int
277 match_regex(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
278 sdb_store_matcher_t *filter)
279 {
280 sdb_data_t v = SDB_DATA_INIT;
281 int status = 0;
283 regex_t regex;
284 _Bool free_regex = 0;
286 assert((m->type == MATCHER_REGEX)
287 || (m->type == MATCHER_NREGEX));
289 if (! CMP_M(m)->right->type) {
290 assert(CMP_M(m)->right->data.type == SDB_TYPE_REGEX);
291 regex = CMP_M(m)->right->data.data.re.regex;
292 }
293 else {
294 sdb_data_t tmp = SDB_DATA_INIT;
295 char *raw;
297 if (sdb_store_expr_eval(CMP_M(m)->right, obj, &tmp, filter))
298 return 0;
300 if (tmp.type != SDB_TYPE_STRING) {
301 sdb_data_free_datum(&tmp);
302 return 0;
303 }
305 raw = tmp.data.string;
306 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &tmp)) {
307 free(raw);
308 return 0;
309 }
311 regex = tmp.data.re.regex;
312 free_regex = 1;
313 free(tmp.data.re.raw);
314 free(raw);
315 }
317 if ((sdb_store_expr_eval(CMP_M(m)->left, obj, &v, filter))
318 || (sdb_data_isnull(&v)))
319 status = 0;
320 else {
321 char value[sdb_data_strlen(&v) + 1];
322 if (sdb_data_format(&v, value, sizeof(value), SDB_UNQUOTED) < 0)
323 status = 0;
324 else if (! regexec(®ex, value, 0, NULL, 0))
325 status = 1;
326 }
328 if (free_regex)
329 regfree(®ex);
330 sdb_data_free_datum(&v);
331 if (m->type == MATCHER_NREGEX)
332 return !status;
333 return status;
334 } /* match_regex */
336 static int
337 match_isnull(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
338 sdb_store_matcher_t *filter)
339 {
340 sdb_data_t v = SDB_DATA_INIT;
341 int status;
343 assert((m->type == MATCHER_ISNULL) || (m->type == MATCHER_ISNNULL));
345 /* TODO: this might hide real errors;
346 * improve error reporting and propagation */
347 if (sdb_store_expr_eval(ISNULL_M(m)->expr, obj, &v, filter)
348 || sdb_data_isnull(&v))
349 status = 1;
350 else
351 status = 0;
353 sdb_data_free_datum(&v);
354 if (m->type == MATCHER_ISNNULL)
355 return !status;
356 return status;
357 } /* match_isnull */
359 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_obj_t *,
360 sdb_store_matcher_t *);
362 /* this array needs to be indexable by the matcher types;
363 * -> update the enum in store-private.h when updating this */
364 static matcher_cb
365 matchers[] = {
366 match_logical,
367 match_logical,
368 match_unary,
369 match_child,
370 match_child,
371 match_child,
372 match_lt,
373 match_le,
374 match_eq,
375 match_ne,
376 match_ge,
377 match_gt,
378 match_in,
379 match_regex,
380 match_regex,
381 match_isnull,
382 match_isnull,
383 };
385 /*
386 * private matcher types
387 */
389 static int
390 op_matcher_init(sdb_object_t *obj, va_list ap)
391 {
392 M(obj)->type = va_arg(ap, int);
393 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
394 return -1;
396 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
397 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
398 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
399 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
401 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
402 return -1;
403 return 0;
404 } /* op_matcher_init */
406 static void
407 op_matcher_destroy(sdb_object_t *obj)
408 {
409 if (OP_M(obj)->left)
410 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
411 if (OP_M(obj)->right)
412 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
413 } /* op_matcher_destroy */
415 static int
416 child_matcher_init(sdb_object_t *obj, va_list ap)
417 {
418 M(obj)->type = va_arg(ap, int);
419 CHILD_M(obj)->m = va_arg(ap, sdb_store_matcher_t *);
421 if (! CHILD_M(obj)->m)
422 return -1;
424 sdb_object_ref(SDB_OBJ(CHILD_M(obj)->m));
425 return 0;
426 } /* child_matcher_init */
428 static void
429 child_matcher_destroy(sdb_object_t *obj)
430 {
431 sdb_object_deref(SDB_OBJ(CHILD_M(obj)->m));
432 } /* child_matcher_destroy */
434 static int
435 cmp_matcher_init(sdb_object_t *obj, va_list ap)
436 {
437 M(obj)->type = va_arg(ap, int);
439 CMP_M(obj)->left = va_arg(ap, sdb_store_expr_t *);
440 sdb_object_ref(SDB_OBJ(CMP_M(obj)->left));
441 CMP_M(obj)->right = va_arg(ap, sdb_store_expr_t *);
442 sdb_object_ref(SDB_OBJ(CMP_M(obj)->right));
444 if ((! CMP_M(obj)->left) || (! CMP_M(obj)->right))
445 return -1;
446 return 0;
447 } /* cmp_matcher_init */
449 static void
450 cmp_matcher_destroy(sdb_object_t *obj)
451 {
452 sdb_object_deref(SDB_OBJ(CMP_M(obj)->left));
453 sdb_object_deref(SDB_OBJ(CMP_M(obj)->right));
454 } /* cmp_matcher_destroy */
456 static int
457 uop_matcher_init(sdb_object_t *obj, va_list ap)
458 {
459 M(obj)->type = va_arg(ap, int);
460 if (M(obj)->type != MATCHER_NOT)
461 return -1;
463 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
464 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
466 if (! UOP_M(obj)->op)
467 return -1;
468 return 0;
469 } /* uop_matcher_init */
471 static void
472 uop_matcher_destroy(sdb_object_t *obj)
473 {
474 if (UOP_M(obj)->op)
475 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
476 } /* uop_matcher_destroy */
478 static int
479 isnull_matcher_init(sdb_object_t *obj, va_list ap)
480 {
481 M(obj)->type = va_arg(ap, int);
482 if ((M(obj)->type != MATCHER_ISNULL) && (M(obj)->type != MATCHER_ISNNULL))
483 return -1;
485 ISNULL_M(obj)->expr = va_arg(ap, sdb_store_expr_t *);
486 sdb_object_ref(SDB_OBJ(ISNULL_M(obj)->expr));
487 return 0;
488 } /* isnull_matcher_init */
490 static void
491 isnull_matcher_destroy(sdb_object_t *obj)
492 {
493 sdb_object_deref(SDB_OBJ(ISNULL_M(obj)->expr));
494 ISNULL_M(obj)->expr = NULL;
495 } /* isnull_matcher_destroy */
497 static sdb_type_t op_type = {
498 /* size = */ sizeof(op_matcher_t),
499 /* init = */ op_matcher_init,
500 /* destroy = */ op_matcher_destroy,
501 };
503 static sdb_type_t uop_type = {
504 /* size = */ sizeof(uop_matcher_t),
505 /* init = */ uop_matcher_init,
506 /* destroy = */ uop_matcher_destroy,
507 };
509 static sdb_type_t child_type = {
510 /* size = */ sizeof(child_matcher_t),
511 /* init = */ child_matcher_init,
512 /* destroy = */ child_matcher_destroy,
513 };
515 static sdb_type_t cmp_type = {
516 /* size = */ sizeof(cmp_matcher_t),
517 /* init = */ cmp_matcher_init,
518 /* destroy = */ cmp_matcher_destroy,
519 };
521 static sdb_type_t isnull_type = {
522 /* size = */ sizeof(isnull_matcher_t),
523 /* init = */ isnull_matcher_init,
524 /* destroy = */ isnull_matcher_destroy,
525 };
527 /*
528 * public API
529 */
531 sdb_store_matcher_t *
532 sdb_store_child_matcher(int type, sdb_store_matcher_t *m)
533 {
534 if (type == SDB_SERVICE)
535 type = MATCHER_SERVICE;
536 else if (type == SDB_METRIC)
537 type = MATCHER_METRIC;
538 else if (type == SDB_ATTRIBUTE)
539 type = MATCHER_ATTRIBUTE;
540 else
541 return NULL;
542 return M(sdb_object_create("any-matcher", child_type, type, m));
543 } /* sdb_store_child_matcher */
545 sdb_store_matcher_t *
546 sdb_store_lt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
547 {
548 return M(sdb_object_create("lt-matcher", cmp_type,
549 MATCHER_LT, left, right));
550 } /* sdb_store_lt_matcher */
552 sdb_store_matcher_t *
553 sdb_store_le_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
554 {
555 return M(sdb_object_create("le-matcher", cmp_type,
556 MATCHER_LE, left, right));
557 } /* sdb_store_le_matcher */
559 sdb_store_matcher_t *
560 sdb_store_eq_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
561 {
562 return M(sdb_object_create("eq-matcher", cmp_type,
563 MATCHER_EQ, left, right));
564 } /* sdb_store_eq_matcher */
566 sdb_store_matcher_t *
567 sdb_store_ne_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
568 {
569 return M(sdb_object_create("ne-matcher", cmp_type,
570 MATCHER_NE, left, right));
571 } /* sdb_store_ne_matcher */
573 sdb_store_matcher_t *
574 sdb_store_ge_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
575 {
576 return M(sdb_object_create("ge-matcher", cmp_type,
577 MATCHER_GE, left, right));
578 } /* sdb_store_ge_matcher */
580 sdb_store_matcher_t *
581 sdb_store_gt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
582 {
583 return M(sdb_object_create("gt-matcher", cmp_type,
584 MATCHER_GT, left, right));
585 } /* sdb_store_gt_matcher */
587 sdb_store_matcher_t *
588 sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
589 {
590 return M(sdb_object_create("in-matcher", cmp_type,
591 MATCHER_IN, left, right));
592 } /* sdb_store_in_matcher */
594 sdb_store_matcher_t *
595 sdb_store_regex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
596 {
597 if (! right->type) {
598 if ((right->data.type != SDB_TYPE_STRING)
599 && (right->data.type != SDB_TYPE_REGEX))
600 return NULL;
602 if (right->data.type == SDB_TYPE_STRING) {
603 char *raw = right->data.data.string;
604 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &right->data))
605 return NULL;
606 free(raw);
607 }
608 }
609 return M(sdb_object_create("regex-matcher", cmp_type,
610 MATCHER_REGEX, left, right));
611 } /* sdb_store_regex_matcher */
613 sdb_store_matcher_t *
614 sdb_store_nregex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
615 {
616 sdb_store_matcher_t *m = sdb_store_regex_matcher(left, right);
617 if (! m)
618 return NULL;
619 m->type = MATCHER_NREGEX;
620 return m;
621 } /* sdb_store_nregex_matcher */
623 sdb_store_matcher_t *
624 sdb_store_isnull_matcher(sdb_store_expr_t *expr)
625 {
626 return M(sdb_object_create("isnull-matcher", isnull_type,
627 MATCHER_ISNULL, expr));
628 } /* sdb_store_isnull_matcher */
630 sdb_store_matcher_t *
631 sdb_store_isnnull_matcher(sdb_store_expr_t *expr)
632 {
633 return M(sdb_object_create("isnull-matcher", isnull_type,
634 MATCHER_ISNNULL, expr));
635 } /* sdb_store_isnnull_matcher */
637 sdb_store_matcher_op_cb
638 sdb_store_parse_matcher_op(const char *op)
639 {
640 if (! strcasecmp(op, "<"))
641 return sdb_store_lt_matcher;
642 else if (! strcasecmp(op, "<="))
643 return sdb_store_le_matcher;
644 else if (! strcasecmp(op, "="))
645 return sdb_store_eq_matcher;
646 else if (! strcasecmp(op, "!="))
647 return sdb_store_ne_matcher;
648 else if (! strcasecmp(op, ">="))
649 return sdb_store_ge_matcher;
650 else if (! strcasecmp(op, ">"))
651 return sdb_store_gt_matcher;
652 else if (! strcasecmp(op, "=~"))
653 return sdb_store_regex_matcher;
654 else if (! strcasecmp(op, "!~"))
655 return sdb_store_nregex_matcher;
656 return NULL;
657 } /* sdb_store_parse_matcher_op */
659 int
660 sdb_store_parse_object_type(const char *name)
661 {
662 if (! strcasecmp(name, "host"))
663 return SDB_HOST;
664 else if (! strcasecmp(name, "service"))
665 return SDB_SERVICE;
666 else if (! strcasecmp(name, "metric"))
667 return SDB_METRIC;
668 else if (! strcasecmp(name, "attribute"))
669 return SDB_ATTRIBUTE;
670 return -1;
671 } /* sdb_store_parse_object_type */
673 int
674 sdb_store_parse_object_type_plural(const char *name)
675 {
676 if (! strcasecmp(name, "hosts"))
677 return SDB_HOST;
678 else if (! strcasecmp(name, "services"))
679 return SDB_SERVICE;
680 else if (! strcasecmp(name, "metrics"))
681 return SDB_METRIC;
682 else if (! strcasecmp(name, "attributes"))
683 return SDB_ATTRIBUTE;
684 return -1;
685 } /* sdb_store_parse_object_type_plural */
687 int
688 sdb_store_parse_field_name(const char *name)
689 {
690 if (! strcasecmp(name, "name"))
691 return SDB_FIELD_NAME;
692 else if (! strcasecmp(name, "last_update"))
693 return SDB_FIELD_LAST_UPDATE;
694 else if (! strcasecmp(name, "age"))
695 return SDB_FIELD_AGE;
696 else if (! strcasecmp(name, "interval"))
697 return SDB_FIELD_INTERVAL;
698 else if (! strcasecmp(name, "backend"))
699 return SDB_FIELD_BACKEND;
700 return -1;
701 } /* sdb_store_parse_field_name */
703 sdb_store_matcher_t *
704 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
705 {
706 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
707 left, right));
708 } /* sdb_store_dis_matcher */
710 sdb_store_matcher_t *
711 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
712 {
713 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
714 left, right));
715 } /* sdb_store_con_matcher */
717 sdb_store_matcher_t *
718 sdb_store_inv_matcher(sdb_store_matcher_t *m)
719 {
720 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
721 } /* sdb_store_inv_matcher */
723 int
724 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
725 sdb_store_matcher_t *filter)
726 {
727 if (filter && (! sdb_store_matcher_matches(filter, obj, NULL)))
728 return 0;
730 /* "NULL" always matches */
731 if ((! m) || (! obj))
732 return 1;
734 if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
735 return 0;
737 return matchers[m->type](m, obj, filter);
738 } /* sdb_store_matcher_matches */
740 int
741 sdb_store_scan(sdb_store_matcher_t *m, sdb_store_matcher_t *filter,
742 sdb_store_lookup_cb cb, void *user_data)
743 {
744 scan_iter_data_t data = { m, filter, cb, user_data };
746 if (! cb)
747 return -1;
748 return sdb_store_iterate(scan_iter, &data);
749 } /* sdb_store_scan */
751 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */