94f95cc5188f4c03d146bd1b7157adab3f62f76f
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"
41 #include "utils/error.h"
43 #include <assert.h>
45 #include <sys/types.h>
46 #include <regex.h>
48 #include <stdlib.h>
49 #include <string.h>
51 #include <limits.h>
53 static int
54 expr_eval2(sdb_store_expr_t *e1, sdb_data_t *v1,
55 sdb_store_expr_t *e2, sdb_data_t *v2,
56 sdb_store_obj_t *obj, sdb_store_matcher_t *filter)
57 {
58 if (e1->type) {
59 if (sdb_store_expr_eval(e1, obj, v1, filter))
60 return -1;
61 }
62 else
63 *v1 = e1->data;
64 if (e2->type) {
65 if (sdb_store_expr_eval(e2, obj, v2, filter)) {
66 if (e1->type)
67 sdb_data_free_datum(v1);
68 return -1;
69 }
70 }
71 else
72 *v2 = e2->data;
73 return 0;
74 } /* expr_eval2 */
76 static void
77 expr_free_datum2(sdb_store_expr_t *e1, sdb_data_t *v1,
78 sdb_store_expr_t *e2, sdb_data_t *v2)
79 {
80 if (e1->type)
81 sdb_data_free_datum(v1);
82 if (e2->type)
83 sdb_data_free_datum(v2);
84 } /* expr_free_datum2 */
86 /*
87 * matcher implementations
88 */
90 /*
91 * cmp_expr:
92 * Compare two values using the specified matcher operator. If strcmp_fallback
93 * is enabled, compare the string values in case of a type mismatch.
94 */
95 static int
96 match_cmp_value(int op, sdb_data_t *v1, sdb_data_t *v2, bool strcmp_fallback)
97 {
98 int status;
100 if (sdb_data_isnull(v1) || (sdb_data_isnull(v2)))
101 status = INT_MAX;
102 else if (v1->type == v2->type)
103 status = sdb_data_cmp(v1, v2);
104 else if (! strcmp_fallback)
105 status = INT_MAX;
106 else
107 status = sdb_data_strcmp(v1, v2);
109 if (status == INT_MAX)
110 return 0;
111 switch (op) {
112 case MATCHER_LT: return status < 0;
113 case MATCHER_LE: return status <= 0;
114 case MATCHER_EQ: return status == 0;
115 case MATCHER_NE: return status != 0;
116 case MATCHER_GE: return status >= 0;
117 case MATCHER_GT: return status > 0;
118 }
119 return 0;
120 } /* match_cmp_value */
122 static int
123 match_regex_value(int op, sdb_data_t *v, sdb_data_t *re)
124 {
125 char value[sdb_data_strlen(v) + 1];
126 int status = 0;
128 assert((op == MATCHER_REGEX)
129 || (op == MATCHER_NREGEX));
131 if (sdb_data_isnull(v) || sdb_data_isnull(re))
132 return 0;
134 if (re->type == SDB_TYPE_STRING) {
135 sdb_data_t tmp = SDB_DATA_INIT;
137 if (sdb_data_parse(re->data.string, SDB_TYPE_REGEX, &tmp))
138 return 0;
140 sdb_data_free_datum(re);
141 *re = tmp;
142 }
143 else if (re->type != SDB_TYPE_REGEX)
144 return 0;
146 if (! sdb_data_format(v, value, sizeof(value), SDB_UNQUOTED))
147 status = 0;
148 else if (! regexec(&re->data.re.regex, value, 0, NULL, 0))
149 status = 1;
151 if (op == MATCHER_NREGEX)
152 return !status;
153 return status;
154 } /* match_regex_value */
156 static int
157 match_value(int op, sdb_data_t *v1, sdb_data_t *v2, bool strcmp_fallback)
158 {
159 if ((op == MATCHER_REGEX) || (op == MATCHER_NREGEX))
160 return match_regex_value(op, v1, v2);
161 return match_cmp_value(op, v1, v2, strcmp_fallback);
162 } /* match_value */
164 static int
165 match_logical(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
166 sdb_store_matcher_t *filter)
167 {
168 int status;
170 assert((m->type == MATCHER_AND) || (m->type == MATCHER_OR));
171 assert(OP_M(m)->left && OP_M(m)->right);
173 status = sdb_store_matcher_matches(OP_M(m)->left, obj, filter);
175 /* lazy evaluation */
176 if ((! status) && (m->type == MATCHER_AND))
177 return status;
178 else if (status && (m->type == MATCHER_OR))
179 return status;
181 return sdb_store_matcher_matches(OP_M(m)->right, obj, filter);
182 } /* match_logical */
184 static int
185 match_unary(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
186 sdb_store_matcher_t *filter)
187 {
188 assert(m->type == MATCHER_NOT);
189 assert(UOP_M(m)->op);
191 return !sdb_store_matcher_matches(UOP_M(m)->op, obj, filter);
192 } /* match_unary */
194 /* iterate arrays: ANY/ALL <array> <cmp> <value> */
195 static int
196 match_iter_array(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
197 sdb_store_matcher_t *filter)
198 {
199 sdb_store_expr_t *e1, *e2;
200 sdb_data_t v1 = SDB_DATA_INIT;
201 sdb_data_t v2 = SDB_DATA_INIT;
203 int status;
205 assert(CMP_M(m)->left && CMP_M(m)->right);
207 if ((ITER_M(m)->m->type < MATCHER_LT)
208 || (MATCHER_NREGEX < ITER_M(m)->m->type))
209 return 0;
211 e1 = CMP_M(ITER_M(m)->m)->left;
212 e2 = CMP_M(ITER_M(m)->m)->right;
214 if (expr_eval2(e1, &v1, e2, &v2, obj, filter))
215 return 0;
217 if ((! (v1.type & SDB_TYPE_ARRAY)) || (v2.type & SDB_TYPE_ARRAY))
218 status = 0;
219 else if (sdb_data_isnull(&v1) || (sdb_data_isnull(&v2)))
220 status = 0;
221 else {
222 size_t i;
223 int all = (int)(m->type == MATCHER_ALL);
225 status = all;
226 for (i = 0; i < v1.data.array.length; ++i) {
227 sdb_data_t v = SDB_DATA_INIT;
228 if (sdb_data_array_get(&v1, i, &v)) {
229 status = 0;
230 break;
231 }
233 if (match_value(ITER_M(m)->m->type, &v, &v2,
234 (e1->data_type) < 0 || (e2->data_type < 0))) {
235 if (! all) {
236 status = 1;
237 break;
238 }
239 }
240 else if (all) {
241 status = 0;
242 break;
243 }
244 }
245 }
247 expr_free_datum2(e1, &v1, e2, &v2);
248 return status;
249 } /* match_iter_array */
251 static int
252 match_iter(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
253 sdb_store_matcher_t *filter)
254 {
255 sdb_avltree_iter_t *iter = NULL;
256 int type, status;
257 int all = (int)(m->type == MATCHER_ALL);
259 assert((m->type == MATCHER_ANY) || (m->type == MATCHER_ALL));
261 if (ITER_M(m)->iter->type == FIELD_VALUE) {
262 if (ITER_M(m)->iter->data.data.integer != SDB_FIELD_BACKEND)
263 return 0;
264 return match_iter_array(m, obj, filter);
265 }
267 assert(ITER_M(m)->iter->type == TYPED_EXPR);
269 type = (int)ITER_M(m)->iter->data.data.integer;
270 if (obj->type == SDB_HOST) {
271 if (type == SDB_SERVICE)
272 iter = sdb_avltree_get_iter(HOST(obj)->services);
273 else if (type == SDB_METRIC)
274 iter = sdb_avltree_get_iter(HOST(obj)->metrics);
275 else if (type == SDB_ATTRIBUTE)
276 iter = sdb_avltree_get_iter(HOST(obj)->attributes);
277 } else if (obj->type == SDB_SERVICE) {
278 if (type == SDB_ATTRIBUTE)
279 iter = sdb_avltree_get_iter(SVC(obj)->attributes);
280 } else if (obj->type == SDB_METRIC) {
281 if (type == SDB_ATTRIBUTE)
282 iter = sdb_avltree_get_iter(METRIC(obj)->attributes);
283 }
285 status = all;
286 while (sdb_avltree_iter_has_next(iter)) {
287 sdb_store_obj_t *child = STORE_OBJ(sdb_avltree_iter_get_next(iter));
288 if (filter && (! sdb_store_matcher_matches(filter, child, NULL)))
289 continue;
291 if (sdb_store_matcher_matches(ITER_M(m)->m, child, filter)) {
292 if (! all) {
293 status = 1;
294 break;
295 }
296 } else if (all) {
297 status = 0;
298 break;
299 }
300 }
301 sdb_avltree_iter_destroy(iter);
302 return status;
303 } /* match_iter */
305 static int
306 match_cmp(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
307 sdb_store_matcher_t *filter)
308 {
309 sdb_store_expr_t *e1 = CMP_M(m)->left;
310 sdb_store_expr_t *e2 = CMP_M(m)->right;
311 sdb_data_t v1 = SDB_DATA_INIT, v2 = SDB_DATA_INIT;
312 int status;
314 assert((m->type == MATCHER_LT)
315 || (m->type == MATCHER_LE)
316 || (m->type == MATCHER_EQ)
317 || (m->type == MATCHER_NE)
318 || (m->type == MATCHER_GE)
319 || (m->type == MATCHER_GT));
320 assert(e1 && e2);
322 if (expr_eval2(e1, &v1, e2, &v2, obj, filter))
323 return 0;
325 status = match_cmp_value(m->type, &v1, &v2,
326 (e1->data_type) < 0 || (e2->data_type < 0));
328 expr_free_datum2(e1, &v1, e2, &v2);
329 return status;
330 } /* match_cmp */
332 static int
333 match_in(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
334 sdb_store_matcher_t *filter)
335 {
336 sdb_data_t value = SDB_DATA_INIT, array = SDB_DATA_INIT;
337 int status = 1;
339 assert((m->type == MATCHER_IN) || (m->type == MATCHER_NIN));
340 assert(CMP_M(m)->left && CMP_M(m)->right);
342 if (expr_eval2(CMP_M(m)->left, &value,
343 CMP_M(m)->right, &array, obj, filter))
344 status = 0;
346 if (status)
347 status = sdb_data_inarray(&value, &array);
349 expr_free_datum2(CMP_M(m)->left, &value, CMP_M(m)->right, &array);
350 if (m->type == MATCHER_NIN)
351 return !status;
352 return status;
353 } /* match_in */
355 static int
356 match_regex(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
357 sdb_store_matcher_t *filter)
358 {
359 sdb_data_t regex = SDB_DATA_INIT, v = SDB_DATA_INIT;
360 int status = 0;
362 assert((m->type == MATCHER_REGEX)
363 || (m->type == MATCHER_NREGEX));
364 assert(CMP_M(m)->left && CMP_M(m)->right);
366 if (expr_eval2(CMP_M(m)->left, &v, CMP_M(m)->right, ®ex, obj, filter))
367 return 0;
369 status = match_regex_value(m->type, &v, ®ex);
371 expr_free_datum2(CMP_M(m)->left, &v, CMP_M(m)->right, ®ex);
372 return status;
373 } /* match_regex */
375 static int
376 match_isnull(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
377 sdb_store_matcher_t *filter)
378 {
379 sdb_data_t v = SDB_DATA_INIT;
380 int status;
382 assert((m->type == MATCHER_ISNULL) || (m->type == MATCHER_ISNNULL));
384 if (ISNULL_M(m)->expr->type) {
385 /* TODO: this might hide real errors;
386 * improve error reporting and propagation */
387 if (sdb_store_expr_eval(ISNULL_M(m)->expr, obj, &v, filter))
388 return 1;
389 }
390 else
391 v = ISNULL_M(m)->expr->data;
393 if (sdb_data_isnull(&v))
394 status = 1;
395 else
396 status = 0;
398 if (ISNULL_M(m)->expr->type)
399 sdb_data_free_datum(&v);
400 if (m->type == MATCHER_ISNNULL)
401 return !status;
402 return status;
403 } /* match_isnull */
405 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_obj_t *,
406 sdb_store_matcher_t *);
408 /* this array needs to be indexable by the matcher types;
409 * -> update the enum in store-private.h when updating this */
410 static matcher_cb
411 matchers[] = {
412 match_logical,
413 match_logical,
414 match_unary,
415 match_iter,
416 match_iter,
417 match_in,
418 match_in,
420 /* unary operators */
421 match_isnull,
422 match_isnull,
424 /* ary operators */
425 match_cmp,
426 match_cmp,
427 match_cmp,
428 match_cmp,
429 match_cmp,
430 match_cmp,
431 match_regex,
432 match_regex,
433 };
435 /*
436 * private matcher types
437 */
439 static int
440 op_matcher_init(sdb_object_t *obj, va_list ap)
441 {
442 M(obj)->type = va_arg(ap, int);
443 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
444 return -1;
446 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
447 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
448 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
449 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
451 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
452 return -1;
453 return 0;
454 } /* op_matcher_init */
456 static void
457 op_matcher_destroy(sdb_object_t *obj)
458 {
459 if (OP_M(obj)->left)
460 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
461 if (OP_M(obj)->right)
462 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
463 } /* op_matcher_destroy */
465 static int
466 iter_matcher_init(sdb_object_t *obj, va_list ap)
467 {
468 M(obj)->type = va_arg(ap, int);
469 ITER_M(obj)->iter = va_arg(ap, sdb_store_expr_t *);
470 ITER_M(obj)->m = va_arg(ap, sdb_store_matcher_t *);
472 sdb_object_ref(SDB_OBJ(ITER_M(obj)->iter));
473 sdb_object_ref(SDB_OBJ(ITER_M(obj)->m));
475 if ((! ITER_M(obj)->iter) || (! ITER_M(obj)->m))
476 return -1;
477 return 0;
478 } /* iter_matcher_init */
480 static void
481 iter_matcher_destroy(sdb_object_t *obj)
482 {
483 sdb_object_deref(SDB_OBJ(ITER_M(obj)->iter));
484 sdb_object_deref(SDB_OBJ(ITER_M(obj)->m));
485 } /* iter_matcher_destroy */
487 static int
488 cmp_matcher_init(sdb_object_t *obj, va_list ap)
489 {
490 M(obj)->type = va_arg(ap, int);
492 CMP_M(obj)->left = va_arg(ap, sdb_store_expr_t *);
493 sdb_object_ref(SDB_OBJ(CMP_M(obj)->left));
494 CMP_M(obj)->right = va_arg(ap, sdb_store_expr_t *);
495 sdb_object_ref(SDB_OBJ(CMP_M(obj)->right));
497 if (! CMP_M(obj)->right)
498 return -1;
499 return 0;
500 } /* cmp_matcher_init */
502 static void
503 cmp_matcher_destroy(sdb_object_t *obj)
504 {
505 sdb_object_deref(SDB_OBJ(CMP_M(obj)->left));
506 sdb_object_deref(SDB_OBJ(CMP_M(obj)->right));
507 } /* cmp_matcher_destroy */
509 static int
510 uop_matcher_init(sdb_object_t *obj, va_list ap)
511 {
512 M(obj)->type = va_arg(ap, int);
513 if (M(obj)->type != MATCHER_NOT)
514 return -1;
516 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
517 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
519 if (! UOP_M(obj)->op)
520 return -1;
521 return 0;
522 } /* uop_matcher_init */
524 static void
525 uop_matcher_destroy(sdb_object_t *obj)
526 {
527 if (UOP_M(obj)->op)
528 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
529 } /* uop_matcher_destroy */
531 static int
532 isnull_matcher_init(sdb_object_t *obj, va_list ap)
533 {
534 M(obj)->type = va_arg(ap, int);
535 if ((M(obj)->type != MATCHER_ISNULL) && (M(obj)->type != MATCHER_ISNNULL))
536 return -1;
538 ISNULL_M(obj)->expr = va_arg(ap, sdb_store_expr_t *);
539 sdb_object_ref(SDB_OBJ(ISNULL_M(obj)->expr));
540 return 0;
541 } /* isnull_matcher_init */
543 static void
544 isnull_matcher_destroy(sdb_object_t *obj)
545 {
546 sdb_object_deref(SDB_OBJ(ISNULL_M(obj)->expr));
547 ISNULL_M(obj)->expr = NULL;
548 } /* isnull_matcher_destroy */
550 static sdb_type_t op_type = {
551 /* size = */ sizeof(op_matcher_t),
552 /* init = */ op_matcher_init,
553 /* destroy = */ op_matcher_destroy,
554 };
556 static sdb_type_t uop_type = {
557 /* size = */ sizeof(uop_matcher_t),
558 /* init = */ uop_matcher_init,
559 /* destroy = */ uop_matcher_destroy,
560 };
562 static sdb_type_t iter_type = {
563 /* size = */ sizeof(iter_matcher_t),
564 /* init = */ iter_matcher_init,
565 /* destroy = */ iter_matcher_destroy,
566 };
568 static sdb_type_t cmp_type = {
569 /* size = */ sizeof(cmp_matcher_t),
570 /* init = */ cmp_matcher_init,
571 /* destroy = */ cmp_matcher_destroy,
572 };
574 static sdb_type_t isnull_type = {
575 /* size = */ sizeof(isnull_matcher_t),
576 /* init = */ isnull_matcher_init,
577 /* destroy = */ isnull_matcher_destroy,
578 };
580 /*
581 * public API
582 */
584 sdb_store_matcher_t *
585 sdb_store_any_matcher(sdb_store_expr_t *iter, sdb_store_matcher_t *m)
586 {
587 if ((m->type < MATCHER_LT) || (MATCHER_NREGEX < m->type)) {
588 sdb_log(SDB_LOG_ERR, "store: Invalid ANY -> %s matcher "
589 "(invalid operator)", MATCHER_SYM(m->type));
590 return NULL;
591 }
592 return M(sdb_object_create("any-matcher", iter_type,
593 MATCHER_ANY, iter, m));
594 } /* sdb_store_any_matcher */
596 sdb_store_matcher_t *
597 sdb_store_all_matcher(sdb_store_expr_t *iter, sdb_store_matcher_t *m)
598 {
599 if ((m->type < MATCHER_LT) || (MATCHER_NREGEX < m->type)) {
600 sdb_log(SDB_LOG_ERR, "store: Invalid ALL -> %s matcher "
601 "(invalid operator)", MATCHER_SYM(m->type));
602 return NULL;
603 }
604 return M(sdb_object_create("all-matcher", iter_type,
605 MATCHER_ALL, iter, m));
606 } /* sdb_store_all_matcher */
608 sdb_store_matcher_t *
609 sdb_store_lt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
610 {
611 return M(sdb_object_create("lt-matcher", cmp_type,
612 MATCHER_LT, left, right));
613 } /* sdb_store_lt_matcher */
615 sdb_store_matcher_t *
616 sdb_store_le_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
617 {
618 return M(sdb_object_create("le-matcher", cmp_type,
619 MATCHER_LE, left, right));
620 } /* sdb_store_le_matcher */
622 sdb_store_matcher_t *
623 sdb_store_eq_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
624 {
625 return M(sdb_object_create("eq-matcher", cmp_type,
626 MATCHER_EQ, left, right));
627 } /* sdb_store_eq_matcher */
629 sdb_store_matcher_t *
630 sdb_store_ne_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
631 {
632 return M(sdb_object_create("ne-matcher", cmp_type,
633 MATCHER_NE, left, right));
634 } /* sdb_store_ne_matcher */
636 sdb_store_matcher_t *
637 sdb_store_ge_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
638 {
639 return M(sdb_object_create("ge-matcher", cmp_type,
640 MATCHER_GE, left, right));
641 } /* sdb_store_ge_matcher */
643 sdb_store_matcher_t *
644 sdb_store_gt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
645 {
646 return M(sdb_object_create("gt-matcher", cmp_type,
647 MATCHER_GT, left, right));
648 } /* sdb_store_gt_matcher */
650 sdb_store_matcher_t *
651 sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
652 {
653 return M(sdb_object_create("in-matcher", cmp_type,
654 MATCHER_IN, left, right));
655 } /* sdb_store_in_matcher */
657 sdb_store_matcher_t *
658 sdb_store_nin_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
659 {
660 return M(sdb_object_create("not-in-matcher", cmp_type,
661 MATCHER_NIN, left, right));
662 } /* sdb_store_in_matcher */
664 sdb_store_matcher_t *
665 sdb_store_regex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
666 {
667 if (! right->type) {
668 if ((right->data.type != SDB_TYPE_STRING)
669 && (right->data.type != SDB_TYPE_REGEX))
670 return NULL;
672 if (right->data.type == SDB_TYPE_STRING) {
673 char *raw = right->data.data.string;
674 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &right->data))
675 return NULL;
676 free(raw);
677 }
678 }
679 return M(sdb_object_create("regex-matcher", cmp_type,
680 MATCHER_REGEX, left, right));
681 } /* sdb_store_regex_matcher */
683 sdb_store_matcher_t *
684 sdb_store_nregex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
685 {
686 sdb_store_matcher_t *m = sdb_store_regex_matcher(left, right);
687 if (! m)
688 return NULL;
689 m->type = MATCHER_NREGEX;
690 return m;
691 } /* sdb_store_nregex_matcher */
693 sdb_store_matcher_t *
694 sdb_store_isnull_matcher(sdb_store_expr_t *expr)
695 {
696 return M(sdb_object_create("isnull-matcher", isnull_type,
697 MATCHER_ISNULL, expr));
698 } /* sdb_store_isnull_matcher */
700 sdb_store_matcher_t *
701 sdb_store_isnnull_matcher(sdb_store_expr_t *expr)
702 {
703 return M(sdb_object_create("isnull-matcher", isnull_type,
704 MATCHER_ISNNULL, expr));
705 } /* sdb_store_isnnull_matcher */
707 sdb_store_matcher_op_cb
708 sdb_store_parse_matcher_op(const char *op)
709 {
710 if (! strcasecmp(op, "<"))
711 return sdb_store_lt_matcher;
712 else if (! strcasecmp(op, "<="))
713 return sdb_store_le_matcher;
714 else if (! strcasecmp(op, "="))
715 return sdb_store_eq_matcher;
716 else if (! strcasecmp(op, "!="))
717 return sdb_store_ne_matcher;
718 else if (! strcasecmp(op, ">="))
719 return sdb_store_ge_matcher;
720 else if (! strcasecmp(op, ">"))
721 return sdb_store_gt_matcher;
722 else if (! strcasecmp(op, "=~"))
723 return sdb_store_regex_matcher;
724 else if (! strcasecmp(op, "!~"))
725 return sdb_store_nregex_matcher;
726 return NULL;
727 } /* sdb_store_parse_matcher_op */
729 int
730 sdb_store_parse_object_type(const char *name)
731 {
732 if (! strcasecmp(name, "host"))
733 return SDB_HOST;
734 else if (! strcasecmp(name, "service"))
735 return SDB_SERVICE;
736 else if (! strcasecmp(name, "metric"))
737 return SDB_METRIC;
738 else if (! strcasecmp(name, "attribute"))
739 return SDB_ATTRIBUTE;
740 return -1;
741 } /* sdb_store_parse_object_type */
743 int
744 sdb_store_parse_object_type_plural(const char *name)
745 {
746 if (! strcasecmp(name, "hosts"))
747 return SDB_HOST;
748 else if (! strcasecmp(name, "services"))
749 return SDB_SERVICE;
750 else if (! strcasecmp(name, "metrics"))
751 return SDB_METRIC;
752 else if (! strcasecmp(name, "attributes"))
753 return SDB_ATTRIBUTE;
754 return -1;
755 } /* sdb_store_parse_object_type_plural */
757 int
758 sdb_store_parse_field_name(const char *name)
759 {
760 if (! strcasecmp(name, "name"))
761 return SDB_FIELD_NAME;
762 else if (! strcasecmp(name, "last_update"))
763 return SDB_FIELD_LAST_UPDATE;
764 else if (! strcasecmp(name, "age"))
765 return SDB_FIELD_AGE;
766 else if (! strcasecmp(name, "interval"))
767 return SDB_FIELD_INTERVAL;
768 else if (! strcasecmp(name, "backend"))
769 return SDB_FIELD_BACKEND;
770 return -1;
771 } /* sdb_store_parse_field_name */
773 sdb_store_matcher_t *
774 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
775 {
776 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
777 left, right));
778 } /* sdb_store_dis_matcher */
780 sdb_store_matcher_t *
781 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
782 {
783 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
784 left, right));
785 } /* sdb_store_con_matcher */
787 sdb_store_matcher_t *
788 sdb_store_inv_matcher(sdb_store_matcher_t *m)
789 {
790 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
791 } /* sdb_store_inv_matcher */
793 int
794 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
795 sdb_store_matcher_t *filter)
796 {
797 if (filter && (! sdb_store_matcher_matches(filter, obj, NULL)))
798 return 0;
800 /* "NULL" always matches */
801 if ((! m) || (! obj))
802 return 1;
804 if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
805 return 0;
807 return matchers[m->type](m, obj, filter);
808 } /* sdb_store_matcher_matches */
810 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */