2d1b3ca11e5fc895ddf7fca662412e345ba84e32
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 static int
53 expr_eval2(sdb_store_expr_t *e1, sdb_data_t *v1,
54 sdb_store_expr_t *e2, sdb_data_t *v2,
55 sdb_store_obj_t *obj, sdb_store_matcher_t *filter)
56 {
57 if (e1->type) {
58 if (sdb_store_expr_eval(e1, obj, v1, filter))
59 return -1;
60 }
61 else
62 *v1 = e1->data;
63 if (e2->type) {
64 if (sdb_store_expr_eval(e2, obj, v2, filter)) {
65 if (e1->type)
66 sdb_data_free_datum(v1);
67 return -1;
68 }
69 }
70 else
71 *v2 = e2->data;
72 return 0;
73 } /* expr_eval2 */
75 static void
76 expr_free_datum2(sdb_store_expr_t *e1, sdb_data_t *v1,
77 sdb_store_expr_t *e2, sdb_data_t *v2)
78 {
79 if (e1->type)
80 sdb_data_free_datum(v1);
81 if (e2->type)
82 sdb_data_free_datum(v2);
83 } /* expr_free_datum2 */
85 /*
86 * matcher implementations
87 */
89 /*
90 * cmp_expr:
91 * Compare two values using the specified matcher operator. If strcmp_fallback
92 * is enabled, compare the string values in case of a type mismatch.
93 */
94 static int
95 match_cmp_value(int op, sdb_data_t *v1, sdb_data_t *v2, bool strcmp_fallback)
96 {
97 int status;
99 if (sdb_data_isnull(v1) || (sdb_data_isnull(v2)))
100 status = INT_MAX;
101 else if (v1->type == v2->type)
102 status = sdb_data_cmp(v1, v2);
103 else if (! strcmp_fallback)
104 status = INT_MAX;
105 else
106 status = sdb_data_strcmp(v1, v2);
108 if (status == INT_MAX)
109 return 0;
110 switch (op) {
111 case MATCHER_LT: return status < 0;
112 case MATCHER_LE: return status <= 0;
113 case MATCHER_EQ: return status == 0;
114 case MATCHER_NE: return status != 0;
115 case MATCHER_GE: return status >= 0;
116 case MATCHER_GT: return status > 0;
117 }
118 return 0;
119 } /* match_cmp_value */
121 static int
122 match_regex_value(int op, sdb_data_t *v, sdb_data_t *re)
123 {
124 char value[sdb_data_strlen(v) + 1];
125 int status = 0;
127 assert((op == MATCHER_REGEX)
128 || (op == MATCHER_NREGEX));
130 if (sdb_data_isnull(v) || sdb_data_isnull(re))
131 return 0;
133 if (re->type == SDB_TYPE_STRING) {
134 sdb_data_t tmp = SDB_DATA_INIT;
136 if (sdb_data_parse(re->data.string, SDB_TYPE_REGEX, &tmp))
137 return 0;
139 sdb_data_free_datum(re);
140 *re = tmp;
141 }
142 else if (re->type != SDB_TYPE_REGEX)
143 return 0;
145 if (sdb_data_format(v, value, sizeof(value), SDB_UNQUOTED) < 0)
146 status = 0;
147 else if (! regexec(&re->data.re.regex, value, 0, NULL, 0))
148 status = 1;
150 if (op == MATCHER_NREGEX)
151 return !status;
152 return status;
153 } /* match_regex_value */
155 static int
156 match_value(int op, sdb_data_t *v1, sdb_data_t *v2, bool strcmp_fallback)
157 {
158 if ((op == MATCHER_REGEX) || (op == MATCHER_NREGEX))
159 return match_regex_value(op, v1, v2);
160 return match_cmp_value(op, v1, v2, strcmp_fallback);
161 } /* match_value */
163 static int
164 match_logical(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
165 sdb_store_matcher_t *filter)
166 {
167 int status;
169 assert((m->type == MATCHER_AND) || (m->type == MATCHER_OR));
170 assert(OP_M(m)->left && OP_M(m)->right);
172 status = sdb_store_matcher_matches(OP_M(m)->left, obj, filter);
174 /* lazy evaluation */
175 if ((! status) && (m->type == MATCHER_AND))
176 return status;
177 else if (status && (m->type == MATCHER_OR))
178 return status;
180 return sdb_store_matcher_matches(OP_M(m)->right, obj, filter);
181 } /* match_logical */
183 static int
184 match_unary(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
185 sdb_store_matcher_t *filter)
186 {
187 assert(m->type == MATCHER_NOT);
188 assert(UOP_M(m)->op);
190 return !sdb_store_matcher_matches(UOP_M(m)->op, obj, filter);
191 } /* match_unary */
193 /* iterate arrays: ANY/ALL <array> <cmp> <value> */
194 static int
195 match_iter_array(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
196 sdb_store_matcher_t *filter)
197 {
198 sdb_store_expr_t *e1, *e2;
199 sdb_data_t v1 = SDB_DATA_INIT;
200 sdb_data_t v2 = SDB_DATA_INIT;
202 int status;
204 if ((ITER_M(m)->m->type < MATCHER_LT)
205 || (MATCHER_NREGEX < ITER_M(m)->m->type))
206 return 0;
208 e1 = CMP_M(ITER_M(m)->m)->left;
209 e2 = CMP_M(ITER_M(m)->m)->right;
211 if (expr_eval2(e1, &v1, e2, &v2, obj, filter))
212 return 0;
214 if ((! (v1.type & SDB_TYPE_ARRAY)) || (v2.type & SDB_TYPE_ARRAY))
215 status = 0;
216 else if (sdb_data_isnull(&v1) || (sdb_data_isnull(&v2)))
217 status = 0;
218 else {
219 size_t i;
220 int all = (int)(m->type == MATCHER_ALL);
222 status = all;
223 for (i = 0; i < v1.data.array.length; ++i) {
224 sdb_data_t v = SDB_DATA_INIT;
225 if (sdb_data_array_get(&v1, i, &v)) {
226 status = 0;
227 break;
228 }
230 if (match_value(ITER_M(m)->m->type, &v, &v2,
231 (e1->data_type) < 0 || (e2->data_type < 0))) {
232 if (! all) {
233 status = 1;
234 break;
235 }
236 }
237 else if (all) {
238 status = 0;
239 break;
240 }
241 }
242 }
244 expr_free_datum2(e1, &v1, e2, &v2);
245 return status;
246 } /* match_iter_array */
248 static int
249 match_iter(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
250 sdb_store_matcher_t *filter)
251 {
252 sdb_avltree_iter_t *iter = NULL;
253 int status;
254 int all = (int)(m->type == MATCHER_ALL);
256 assert((m->type == MATCHER_ANY) || (m->type == MATCHER_ALL));
258 if (ITER_M(m)->type == SDB_FIELD_BACKEND)
259 return match_iter_array(m, obj, filter);
261 if (obj->type == SDB_HOST) {
262 if (ITER_M(m)->type == SDB_SERVICE)
263 iter = sdb_avltree_get_iter(HOST(obj)->services);
264 else if (ITER_M(m)->type == SDB_METRIC)
265 iter = sdb_avltree_get_iter(HOST(obj)->metrics);
266 else if (ITER_M(m)->type == SDB_ATTRIBUTE)
267 iter = sdb_avltree_get_iter(HOST(obj)->attributes);
268 } else if (obj->type == SDB_SERVICE) {
269 if (ITER_M(m)->type == SDB_ATTRIBUTE)
270 iter = sdb_avltree_get_iter(SVC(obj)->attributes);
271 } else if (obj->type == SDB_METRIC) {
272 if (ITER_M(m)->type == SDB_ATTRIBUTE)
273 iter = sdb_avltree_get_iter(METRIC(obj)->attributes);
274 }
276 status = all;
277 while (sdb_avltree_iter_has_next(iter)) {
278 sdb_store_obj_t *child = STORE_OBJ(sdb_avltree_iter_get_next(iter));
279 if (filter && (! sdb_store_matcher_matches(filter, child, NULL)))
280 continue;
282 if (sdb_store_matcher_matches(ITER_M(m)->m, child, filter)) {
283 if (! all) {
284 status = 1;
285 break;
286 }
287 } else if (all) {
288 status = 0;
289 break;
290 }
291 }
292 sdb_avltree_iter_destroy(iter);
293 return status;
294 } /* match_iter */
296 static int
297 match_cmp(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
298 sdb_store_matcher_t *filter)
299 {
300 sdb_store_expr_t *e1 = CMP_M(m)->left;
301 sdb_store_expr_t *e2 = CMP_M(m)->right;
302 sdb_data_t v1 = SDB_DATA_INIT, v2 = SDB_DATA_INIT;
303 int status;
305 assert((m->type == MATCHER_LT)
306 || (m->type == MATCHER_LE)
307 || (m->type == MATCHER_EQ)
308 || (m->type == MATCHER_NE)
309 || (m->type == MATCHER_GE)
310 || (m->type == MATCHER_GT));
312 if (expr_eval2(e1, &v1, e2, &v2, obj, filter))
313 return 0;
315 status = match_cmp_value(m->type, &v1, &v2,
316 (e1->data_type) < 0 || (e2->data_type < 0));
318 expr_free_datum2(e1, &v1, e2, &v2);
319 return status;
320 } /* match_cmp */
322 static int
323 match_in(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
324 sdb_store_matcher_t *filter)
325 {
326 sdb_data_t value = SDB_DATA_INIT, array = SDB_DATA_INIT;
327 int status = 1;
329 assert((m->type == MATCHER_IN) || (m->type == MATCHER_NIN));
331 if (expr_eval2(CMP_M(m)->left, &value,
332 CMP_M(m)->right, &array, obj, filter))
333 status = 0;
335 if (status)
336 status = sdb_data_inarray(&value, &array);
338 expr_free_datum2(CMP_M(m)->left, &value, CMP_M(m)->right, &array);
339 if (m->type == MATCHER_NIN)
340 return !status;
341 return status;
342 } /* match_in */
344 static int
345 match_regex(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
346 sdb_store_matcher_t *filter)
347 {
348 sdb_data_t regex = SDB_DATA_INIT, v = SDB_DATA_INIT;
349 int status = 0;
351 assert((m->type == MATCHER_REGEX)
352 || (m->type == MATCHER_NREGEX));
354 if (expr_eval2(CMP_M(m)->left, &v, CMP_M(m)->right, ®ex, obj, filter))
355 return 0;
357 status = match_regex_value(m->type, &v, ®ex);
359 expr_free_datum2(CMP_M(m)->left, &v, CMP_M(m)->right, ®ex);
360 return status;
361 } /* match_regex */
363 static int
364 match_isnull(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
365 sdb_store_matcher_t *filter)
366 {
367 sdb_data_t v = SDB_DATA_INIT;
368 int status;
370 assert((m->type == MATCHER_ISNULL) || (m->type == MATCHER_ISNNULL));
372 if (ISNULL_M(m)->expr->type) {
373 /* TODO: this might hide real errors;
374 * improve error reporting and propagation */
375 if (sdb_store_expr_eval(ISNULL_M(m)->expr, obj, &v, filter))
376 return 1;
377 }
378 else
379 v = ISNULL_M(m)->expr->data;
381 if (sdb_data_isnull(&v))
382 status = 1;
383 else
384 status = 0;
386 if (ISNULL_M(m)->expr->type)
387 sdb_data_free_datum(&v);
388 if (m->type == MATCHER_ISNNULL)
389 return !status;
390 return status;
391 } /* match_isnull */
393 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_obj_t *,
394 sdb_store_matcher_t *);
396 /* this array needs to be indexable by the matcher types;
397 * -> update the enum in store-private.h when updating this */
398 static matcher_cb
399 matchers[] = {
400 match_logical,
401 match_logical,
402 match_unary,
403 match_iter,
404 match_iter,
405 match_in,
406 match_in,
408 /* unary operators */
409 match_isnull,
410 match_isnull,
412 /* ary operators */
413 match_cmp,
414 match_cmp,
415 match_cmp,
416 match_cmp,
417 match_cmp,
418 match_cmp,
419 match_regex,
420 match_regex,
421 };
423 /*
424 * private matcher types
425 */
427 static int
428 op_matcher_init(sdb_object_t *obj, va_list ap)
429 {
430 M(obj)->type = va_arg(ap, int);
431 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
432 return -1;
434 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
435 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
436 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
437 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
439 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
440 return -1;
441 return 0;
442 } /* op_matcher_init */
444 static void
445 op_matcher_destroy(sdb_object_t *obj)
446 {
447 if (OP_M(obj)->left)
448 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
449 if (OP_M(obj)->right)
450 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
451 } /* op_matcher_destroy */
453 static int
454 iter_matcher_init(sdb_object_t *obj, va_list ap)
455 {
456 M(obj)->type = va_arg(ap, int);
457 ITER_M(obj)->type = va_arg(ap, int);
458 ITER_M(obj)->m = va_arg(ap, sdb_store_matcher_t *);
460 if (! ITER_M(obj)->m)
461 return -1;
463 sdb_object_ref(SDB_OBJ(ITER_M(obj)->m));
464 return 0;
465 } /* iter_matcher_init */
467 static void
468 iter_matcher_destroy(sdb_object_t *obj)
469 {
470 sdb_object_deref(SDB_OBJ(ITER_M(obj)->m));
471 } /* iter_matcher_destroy */
473 static int
474 cmp_matcher_init(sdb_object_t *obj, va_list ap)
475 {
476 M(obj)->type = va_arg(ap, int);
478 CMP_M(obj)->left = va_arg(ap, sdb_store_expr_t *);
479 sdb_object_ref(SDB_OBJ(CMP_M(obj)->left));
480 CMP_M(obj)->right = va_arg(ap, sdb_store_expr_t *);
481 sdb_object_ref(SDB_OBJ(CMP_M(obj)->right));
483 if ((! CMP_M(obj)->left) || (! CMP_M(obj)->right))
484 return -1;
485 return 0;
486 } /* cmp_matcher_init */
488 static void
489 cmp_matcher_destroy(sdb_object_t *obj)
490 {
491 sdb_object_deref(SDB_OBJ(CMP_M(obj)->left));
492 sdb_object_deref(SDB_OBJ(CMP_M(obj)->right));
493 } /* cmp_matcher_destroy */
495 static int
496 uop_matcher_init(sdb_object_t *obj, va_list ap)
497 {
498 M(obj)->type = va_arg(ap, int);
499 if (M(obj)->type != MATCHER_NOT)
500 return -1;
502 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
503 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
505 if (! UOP_M(obj)->op)
506 return -1;
507 return 0;
508 } /* uop_matcher_init */
510 static void
511 uop_matcher_destroy(sdb_object_t *obj)
512 {
513 if (UOP_M(obj)->op)
514 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
515 } /* uop_matcher_destroy */
517 static int
518 isnull_matcher_init(sdb_object_t *obj, va_list ap)
519 {
520 M(obj)->type = va_arg(ap, int);
521 if ((M(obj)->type != MATCHER_ISNULL) && (M(obj)->type != MATCHER_ISNNULL))
522 return -1;
524 ISNULL_M(obj)->expr = va_arg(ap, sdb_store_expr_t *);
525 sdb_object_ref(SDB_OBJ(ISNULL_M(obj)->expr));
526 return 0;
527 } /* isnull_matcher_init */
529 static void
530 isnull_matcher_destroy(sdb_object_t *obj)
531 {
532 sdb_object_deref(SDB_OBJ(ISNULL_M(obj)->expr));
533 ISNULL_M(obj)->expr = NULL;
534 } /* isnull_matcher_destroy */
536 static sdb_type_t op_type = {
537 /* size = */ sizeof(op_matcher_t),
538 /* init = */ op_matcher_init,
539 /* destroy = */ op_matcher_destroy,
540 };
542 static sdb_type_t uop_type = {
543 /* size = */ sizeof(uop_matcher_t),
544 /* init = */ uop_matcher_init,
545 /* destroy = */ uop_matcher_destroy,
546 };
548 static sdb_type_t iter_type = {
549 /* size = */ sizeof(iter_matcher_t),
550 /* init = */ iter_matcher_init,
551 /* destroy = */ iter_matcher_destroy,
552 };
554 static sdb_type_t cmp_type = {
555 /* size = */ sizeof(cmp_matcher_t),
556 /* init = */ cmp_matcher_init,
557 /* destroy = */ cmp_matcher_destroy,
558 };
560 static sdb_type_t isnull_type = {
561 /* size = */ sizeof(isnull_matcher_t),
562 /* init = */ isnull_matcher_init,
563 /* destroy = */ isnull_matcher_destroy,
564 };
566 /*
567 * public API
568 */
570 sdb_store_matcher_t *
571 sdb_store_any_matcher(int type, sdb_store_matcher_t *m)
572 {
573 if ((type != SDB_SERVICE) && (type != SDB_METRIC)
574 && (type != SDB_ATTRIBUTE) && (type != SDB_FIELD_BACKEND))
575 return NULL;
576 return M(sdb_object_create("any-matcher", iter_type,
577 MATCHER_ANY, type, m));
578 } /* sdb_store_any_matcher */
580 sdb_store_matcher_t *
581 sdb_store_all_matcher(int type, sdb_store_matcher_t *m)
582 {
583 if ((type != SDB_SERVICE) && (type != SDB_METRIC)
584 && (type != SDB_ATTRIBUTE) && (type != SDB_FIELD_BACKEND))
585 return NULL;
586 return M(sdb_object_create("all-matcher", iter_type,
587 MATCHER_ALL, type, m));
588 } /* sdb_store_all_matcher */
590 sdb_store_matcher_t *
591 sdb_store_lt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
592 {
593 return M(sdb_object_create("lt-matcher", cmp_type,
594 MATCHER_LT, left, right));
595 } /* sdb_store_lt_matcher */
597 sdb_store_matcher_t *
598 sdb_store_le_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
599 {
600 return M(sdb_object_create("le-matcher", cmp_type,
601 MATCHER_LE, left, right));
602 } /* sdb_store_le_matcher */
604 sdb_store_matcher_t *
605 sdb_store_eq_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
606 {
607 return M(sdb_object_create("eq-matcher", cmp_type,
608 MATCHER_EQ, left, right));
609 } /* sdb_store_eq_matcher */
611 sdb_store_matcher_t *
612 sdb_store_ne_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
613 {
614 return M(sdb_object_create("ne-matcher", cmp_type,
615 MATCHER_NE, left, right));
616 } /* sdb_store_ne_matcher */
618 sdb_store_matcher_t *
619 sdb_store_ge_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
620 {
621 return M(sdb_object_create("ge-matcher", cmp_type,
622 MATCHER_GE, left, right));
623 } /* sdb_store_ge_matcher */
625 sdb_store_matcher_t *
626 sdb_store_gt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
627 {
628 return M(sdb_object_create("gt-matcher", cmp_type,
629 MATCHER_GT, left, right));
630 } /* sdb_store_gt_matcher */
632 sdb_store_matcher_t *
633 sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
634 {
635 return M(sdb_object_create("in-matcher", cmp_type,
636 MATCHER_IN, left, right));
637 } /* sdb_store_in_matcher */
639 sdb_store_matcher_t *
640 sdb_store_nin_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
641 {
642 return M(sdb_object_create("not-in-matcher", cmp_type,
643 MATCHER_NIN, left, right));
644 } /* sdb_store_in_matcher */
646 sdb_store_matcher_t *
647 sdb_store_regex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
648 {
649 if (! right->type) {
650 if ((right->data.type != SDB_TYPE_STRING)
651 && (right->data.type != SDB_TYPE_REGEX))
652 return NULL;
654 if (right->data.type == SDB_TYPE_STRING) {
655 char *raw = right->data.data.string;
656 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &right->data))
657 return NULL;
658 free(raw);
659 }
660 }
661 return M(sdb_object_create("regex-matcher", cmp_type,
662 MATCHER_REGEX, left, right));
663 } /* sdb_store_regex_matcher */
665 sdb_store_matcher_t *
666 sdb_store_nregex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
667 {
668 sdb_store_matcher_t *m = sdb_store_regex_matcher(left, right);
669 if (! m)
670 return NULL;
671 m->type = MATCHER_NREGEX;
672 return m;
673 } /* sdb_store_nregex_matcher */
675 sdb_store_matcher_t *
676 sdb_store_isnull_matcher(sdb_store_expr_t *expr)
677 {
678 return M(sdb_object_create("isnull-matcher", isnull_type,
679 MATCHER_ISNULL, expr));
680 } /* sdb_store_isnull_matcher */
682 sdb_store_matcher_t *
683 sdb_store_isnnull_matcher(sdb_store_expr_t *expr)
684 {
685 return M(sdb_object_create("isnull-matcher", isnull_type,
686 MATCHER_ISNNULL, expr));
687 } /* sdb_store_isnnull_matcher */
689 sdb_store_matcher_op_cb
690 sdb_store_parse_matcher_op(const char *op)
691 {
692 if (! strcasecmp(op, "<"))
693 return sdb_store_lt_matcher;
694 else if (! strcasecmp(op, "<="))
695 return sdb_store_le_matcher;
696 else if (! strcasecmp(op, "="))
697 return sdb_store_eq_matcher;
698 else if (! strcasecmp(op, "!="))
699 return sdb_store_ne_matcher;
700 else if (! strcasecmp(op, ">="))
701 return sdb_store_ge_matcher;
702 else if (! strcasecmp(op, ">"))
703 return sdb_store_gt_matcher;
704 else if (! strcasecmp(op, "=~"))
705 return sdb_store_regex_matcher;
706 else if (! strcasecmp(op, "!~"))
707 return sdb_store_nregex_matcher;
708 return NULL;
709 } /* sdb_store_parse_matcher_op */
711 int
712 sdb_store_parse_object_type(const char *name)
713 {
714 if (! strcasecmp(name, "host"))
715 return SDB_HOST;
716 else if (! strcasecmp(name, "service"))
717 return SDB_SERVICE;
718 else if (! strcasecmp(name, "metric"))
719 return SDB_METRIC;
720 else if (! strcasecmp(name, "attribute"))
721 return SDB_ATTRIBUTE;
722 return -1;
723 } /* sdb_store_parse_object_type */
725 int
726 sdb_store_parse_object_type_plural(const char *name)
727 {
728 if (! strcasecmp(name, "hosts"))
729 return SDB_HOST;
730 else if (! strcasecmp(name, "services"))
731 return SDB_SERVICE;
732 else if (! strcasecmp(name, "metrics"))
733 return SDB_METRIC;
734 else if (! strcasecmp(name, "attributes"))
735 return SDB_ATTRIBUTE;
736 return -1;
737 } /* sdb_store_parse_object_type_plural */
739 int
740 sdb_store_parse_field_name(const char *name)
741 {
742 if (! strcasecmp(name, "name"))
743 return SDB_FIELD_NAME;
744 else if (! strcasecmp(name, "last_update"))
745 return SDB_FIELD_LAST_UPDATE;
746 else if (! strcasecmp(name, "age"))
747 return SDB_FIELD_AGE;
748 else if (! strcasecmp(name, "interval"))
749 return SDB_FIELD_INTERVAL;
750 else if (! strcasecmp(name, "backend"))
751 return SDB_FIELD_BACKEND;
752 return -1;
753 } /* sdb_store_parse_field_name */
755 sdb_store_matcher_t *
756 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
757 {
758 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
759 left, right));
760 } /* sdb_store_dis_matcher */
762 sdb_store_matcher_t *
763 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
764 {
765 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
766 left, right));
767 } /* sdb_store_con_matcher */
769 sdb_store_matcher_t *
770 sdb_store_inv_matcher(sdb_store_matcher_t *m)
771 {
772 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
773 } /* sdb_store_inv_matcher */
775 int
776 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
777 sdb_store_matcher_t *filter)
778 {
779 if (filter && (! sdb_store_matcher_matches(filter, obj, NULL)))
780 return 0;
782 /* "NULL" always matches */
783 if ((! m) || (! obj))
784 return 1;
786 if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
787 return 0;
789 return matchers[m->type](m, obj, filter);
790 } /* sdb_store_matcher_matches */
792 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */