5aa69152f237576cb4d2995e15c9a3c771b5b976
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 assert(CMP_M(m)->left && CMP_M(m)->right);
206 if ((ITER_M(m)->m->type < MATCHER_LT)
207 || (MATCHER_NREGEX < ITER_M(m)->m->type))
208 return 0;
210 e1 = CMP_M(ITER_M(m)->m)->left;
211 e2 = CMP_M(ITER_M(m)->m)->right;
213 if (expr_eval2(e1, &v1, e2, &v2, obj, filter))
214 return 0;
216 if ((! (v1.type & SDB_TYPE_ARRAY)) || (v2.type & SDB_TYPE_ARRAY))
217 status = 0;
218 else if (sdb_data_isnull(&v1) || (sdb_data_isnull(&v2)))
219 status = 0;
220 else {
221 size_t i;
222 int all = (int)(m->type == MATCHER_ALL);
224 status = all;
225 for (i = 0; i < v1.data.array.length; ++i) {
226 sdb_data_t v = SDB_DATA_INIT;
227 if (sdb_data_array_get(&v1, i, &v)) {
228 status = 0;
229 break;
230 }
232 if (match_value(ITER_M(m)->m->type, &v, &v2,
233 (e1->data_type) < 0 || (e2->data_type < 0))) {
234 if (! all) {
235 status = 1;
236 break;
237 }
238 }
239 else if (all) {
240 status = 0;
241 break;
242 }
243 }
244 }
246 expr_free_datum2(e1, &v1, e2, &v2);
247 return status;
248 } /* match_iter_array */
250 static int
251 match_iter(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
252 sdb_store_matcher_t *filter)
253 {
254 sdb_avltree_iter_t *iter = NULL;
255 int status;
256 int all = (int)(m->type == MATCHER_ALL);
258 assert((m->type == MATCHER_ANY) || (m->type == MATCHER_ALL));
260 if (ITER_M(m)->type == SDB_FIELD_BACKEND)
261 return match_iter_array(m, obj, filter);
263 if (obj->type == SDB_HOST) {
264 if (ITER_M(m)->type == SDB_SERVICE)
265 iter = sdb_avltree_get_iter(HOST(obj)->services);
266 else if (ITER_M(m)->type == SDB_METRIC)
267 iter = sdb_avltree_get_iter(HOST(obj)->metrics);
268 else if (ITER_M(m)->type == SDB_ATTRIBUTE)
269 iter = sdb_avltree_get_iter(HOST(obj)->attributes);
270 } else if (obj->type == SDB_SERVICE) {
271 if (ITER_M(m)->type == SDB_ATTRIBUTE)
272 iter = sdb_avltree_get_iter(SVC(obj)->attributes);
273 } else if (obj->type == SDB_METRIC) {
274 if (ITER_M(m)->type == SDB_ATTRIBUTE)
275 iter = sdb_avltree_get_iter(METRIC(obj)->attributes);
276 }
278 status = all;
279 while (sdb_avltree_iter_has_next(iter)) {
280 sdb_store_obj_t *child = STORE_OBJ(sdb_avltree_iter_get_next(iter));
281 if (filter && (! sdb_store_matcher_matches(filter, child, NULL)))
282 continue;
284 if (sdb_store_matcher_matches(ITER_M(m)->m, child, filter)) {
285 if (! all) {
286 status = 1;
287 break;
288 }
289 } else if (all) {
290 status = 0;
291 break;
292 }
293 }
294 sdb_avltree_iter_destroy(iter);
295 return status;
296 } /* match_iter */
298 static int
299 match_cmp(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
300 sdb_store_matcher_t *filter)
301 {
302 sdb_store_expr_t *e1 = CMP_M(m)->left;
303 sdb_store_expr_t *e2 = CMP_M(m)->right;
304 sdb_data_t v1 = SDB_DATA_INIT, v2 = SDB_DATA_INIT;
305 int status;
307 assert((m->type == MATCHER_LT)
308 || (m->type == MATCHER_LE)
309 || (m->type == MATCHER_EQ)
310 || (m->type == MATCHER_NE)
311 || (m->type == MATCHER_GE)
312 || (m->type == MATCHER_GT));
313 assert(e1 && e2);
315 if (expr_eval2(e1, &v1, e2, &v2, obj, filter))
316 return 0;
318 status = match_cmp_value(m->type, &v1, &v2,
319 (e1->data_type) < 0 || (e2->data_type < 0));
321 expr_free_datum2(e1, &v1, e2, &v2);
322 return status;
323 } /* match_cmp */
325 static int
326 match_in(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
327 sdb_store_matcher_t *filter)
328 {
329 sdb_data_t value = SDB_DATA_INIT, array = SDB_DATA_INIT;
330 int status = 1;
332 assert((m->type == MATCHER_IN) || (m->type == MATCHER_NIN));
333 assert(CMP_M(m)->left && CMP_M(m)->right);
335 if (expr_eval2(CMP_M(m)->left, &value,
336 CMP_M(m)->right, &array, obj, filter))
337 status = 0;
339 if (status)
340 status = sdb_data_inarray(&value, &array);
342 expr_free_datum2(CMP_M(m)->left, &value, CMP_M(m)->right, &array);
343 if (m->type == MATCHER_NIN)
344 return !status;
345 return status;
346 } /* match_in */
348 static int
349 match_regex(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
350 sdb_store_matcher_t *filter)
351 {
352 sdb_data_t regex = SDB_DATA_INIT, v = SDB_DATA_INIT;
353 int status = 0;
355 assert((m->type == MATCHER_REGEX)
356 || (m->type == MATCHER_NREGEX));
357 assert(CMP_M(m)->left && CMP_M(m)->right);
359 if (expr_eval2(CMP_M(m)->left, &v, CMP_M(m)->right, ®ex, obj, filter))
360 return 0;
362 status = match_regex_value(m->type, &v, ®ex);
364 expr_free_datum2(CMP_M(m)->left, &v, CMP_M(m)->right, ®ex);
365 return status;
366 } /* match_regex */
368 static int
369 match_isnull(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
370 sdb_store_matcher_t *filter)
371 {
372 sdb_data_t v = SDB_DATA_INIT;
373 int status;
375 assert((m->type == MATCHER_ISNULL) || (m->type == MATCHER_ISNNULL));
377 if (ISNULL_M(m)->expr->type) {
378 /* TODO: this might hide real errors;
379 * improve error reporting and propagation */
380 if (sdb_store_expr_eval(ISNULL_M(m)->expr, obj, &v, filter))
381 return 1;
382 }
383 else
384 v = ISNULL_M(m)->expr->data;
386 if (sdb_data_isnull(&v))
387 status = 1;
388 else
389 status = 0;
391 if (ISNULL_M(m)->expr->type)
392 sdb_data_free_datum(&v);
393 if (m->type == MATCHER_ISNNULL)
394 return !status;
395 return status;
396 } /* match_isnull */
398 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_obj_t *,
399 sdb_store_matcher_t *);
401 /* this array needs to be indexable by the matcher types;
402 * -> update the enum in store-private.h when updating this */
403 static matcher_cb
404 matchers[] = {
405 match_logical,
406 match_logical,
407 match_unary,
408 match_iter,
409 match_iter,
410 match_in,
411 match_in,
413 /* unary operators */
414 match_isnull,
415 match_isnull,
417 /* ary operators */
418 match_cmp,
419 match_cmp,
420 match_cmp,
421 match_cmp,
422 match_cmp,
423 match_cmp,
424 match_regex,
425 match_regex,
426 };
428 /*
429 * private matcher types
430 */
432 static int
433 op_matcher_init(sdb_object_t *obj, va_list ap)
434 {
435 M(obj)->type = va_arg(ap, int);
436 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
437 return -1;
439 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
440 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
441 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
442 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
444 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
445 return -1;
446 return 0;
447 } /* op_matcher_init */
449 static void
450 op_matcher_destroy(sdb_object_t *obj)
451 {
452 if (OP_M(obj)->left)
453 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
454 if (OP_M(obj)->right)
455 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
456 } /* op_matcher_destroy */
458 static int
459 iter_matcher_init(sdb_object_t *obj, va_list ap)
460 {
461 M(obj)->type = va_arg(ap, int);
462 ITER_M(obj)->type = va_arg(ap, int);
463 ITER_M(obj)->m = va_arg(ap, sdb_store_matcher_t *);
465 if (! ITER_M(obj)->m)
466 return -1;
468 sdb_object_ref(SDB_OBJ(ITER_M(obj)->m));
469 return 0;
470 } /* iter_matcher_init */
472 static void
473 iter_matcher_destroy(sdb_object_t *obj)
474 {
475 sdb_object_deref(SDB_OBJ(ITER_M(obj)->m));
476 } /* iter_matcher_destroy */
478 static int
479 cmp_matcher_init(sdb_object_t *obj, va_list ap)
480 {
481 M(obj)->type = va_arg(ap, int);
483 CMP_M(obj)->left = va_arg(ap, sdb_store_expr_t *);
484 sdb_object_ref(SDB_OBJ(CMP_M(obj)->left));
485 CMP_M(obj)->right = va_arg(ap, sdb_store_expr_t *);
486 sdb_object_ref(SDB_OBJ(CMP_M(obj)->right));
488 if (! CMP_M(obj)->right)
489 return -1;
490 return 0;
491 } /* cmp_matcher_init */
493 static void
494 cmp_matcher_destroy(sdb_object_t *obj)
495 {
496 sdb_object_deref(SDB_OBJ(CMP_M(obj)->left));
497 sdb_object_deref(SDB_OBJ(CMP_M(obj)->right));
498 } /* cmp_matcher_destroy */
500 static int
501 uop_matcher_init(sdb_object_t *obj, va_list ap)
502 {
503 M(obj)->type = va_arg(ap, int);
504 if (M(obj)->type != MATCHER_NOT)
505 return -1;
507 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
508 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
510 if (! UOP_M(obj)->op)
511 return -1;
512 return 0;
513 } /* uop_matcher_init */
515 static void
516 uop_matcher_destroy(sdb_object_t *obj)
517 {
518 if (UOP_M(obj)->op)
519 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
520 } /* uop_matcher_destroy */
522 static int
523 isnull_matcher_init(sdb_object_t *obj, va_list ap)
524 {
525 M(obj)->type = va_arg(ap, int);
526 if ((M(obj)->type != MATCHER_ISNULL) && (M(obj)->type != MATCHER_ISNNULL))
527 return -1;
529 ISNULL_M(obj)->expr = va_arg(ap, sdb_store_expr_t *);
530 sdb_object_ref(SDB_OBJ(ISNULL_M(obj)->expr));
531 return 0;
532 } /* isnull_matcher_init */
534 static void
535 isnull_matcher_destroy(sdb_object_t *obj)
536 {
537 sdb_object_deref(SDB_OBJ(ISNULL_M(obj)->expr));
538 ISNULL_M(obj)->expr = NULL;
539 } /* isnull_matcher_destroy */
541 static sdb_type_t op_type = {
542 /* size = */ sizeof(op_matcher_t),
543 /* init = */ op_matcher_init,
544 /* destroy = */ op_matcher_destroy,
545 };
547 static sdb_type_t uop_type = {
548 /* size = */ sizeof(uop_matcher_t),
549 /* init = */ uop_matcher_init,
550 /* destroy = */ uop_matcher_destroy,
551 };
553 static sdb_type_t iter_type = {
554 /* size = */ sizeof(iter_matcher_t),
555 /* init = */ iter_matcher_init,
556 /* destroy = */ iter_matcher_destroy,
557 };
559 static sdb_type_t cmp_type = {
560 /* size = */ sizeof(cmp_matcher_t),
561 /* init = */ cmp_matcher_init,
562 /* destroy = */ cmp_matcher_destroy,
563 };
565 static sdb_type_t isnull_type = {
566 /* size = */ sizeof(isnull_matcher_t),
567 /* init = */ isnull_matcher_init,
568 /* destroy = */ isnull_matcher_destroy,
569 };
571 /*
572 * public API
573 */
575 sdb_store_matcher_t *
576 sdb_store_any_matcher(int type, sdb_store_matcher_t *m)
577 {
578 if ((type != SDB_SERVICE) && (type != SDB_METRIC)
579 && (type != SDB_ATTRIBUTE) && (type != SDB_FIELD_BACKEND))
580 return NULL;
581 return M(sdb_object_create("any-matcher", iter_type,
582 MATCHER_ANY, type, m));
583 } /* sdb_store_any_matcher */
585 sdb_store_matcher_t *
586 sdb_store_all_matcher(int type, sdb_store_matcher_t *m)
587 {
588 if ((type != SDB_SERVICE) && (type != SDB_METRIC)
589 && (type != SDB_ATTRIBUTE) && (type != SDB_FIELD_BACKEND))
590 return NULL;
591 return M(sdb_object_create("all-matcher", iter_type,
592 MATCHER_ALL, type, m));
593 } /* sdb_store_all_matcher */
595 sdb_store_matcher_t *
596 sdb_store_lt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
597 {
598 return M(sdb_object_create("lt-matcher", cmp_type,
599 MATCHER_LT, left, right));
600 } /* sdb_store_lt_matcher */
602 sdb_store_matcher_t *
603 sdb_store_le_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
604 {
605 return M(sdb_object_create("le-matcher", cmp_type,
606 MATCHER_LE, left, right));
607 } /* sdb_store_le_matcher */
609 sdb_store_matcher_t *
610 sdb_store_eq_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
611 {
612 return M(sdb_object_create("eq-matcher", cmp_type,
613 MATCHER_EQ, left, right));
614 } /* sdb_store_eq_matcher */
616 sdb_store_matcher_t *
617 sdb_store_ne_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
618 {
619 return M(sdb_object_create("ne-matcher", cmp_type,
620 MATCHER_NE, left, right));
621 } /* sdb_store_ne_matcher */
623 sdb_store_matcher_t *
624 sdb_store_ge_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
625 {
626 return M(sdb_object_create("ge-matcher", cmp_type,
627 MATCHER_GE, left, right));
628 } /* sdb_store_ge_matcher */
630 sdb_store_matcher_t *
631 sdb_store_gt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
632 {
633 return M(sdb_object_create("gt-matcher", cmp_type,
634 MATCHER_GT, left, right));
635 } /* sdb_store_gt_matcher */
637 sdb_store_matcher_t *
638 sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
639 {
640 return M(sdb_object_create("in-matcher", cmp_type,
641 MATCHER_IN, left, right));
642 } /* sdb_store_in_matcher */
644 sdb_store_matcher_t *
645 sdb_store_nin_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
646 {
647 return M(sdb_object_create("not-in-matcher", cmp_type,
648 MATCHER_NIN, left, right));
649 } /* sdb_store_in_matcher */
651 sdb_store_matcher_t *
652 sdb_store_regex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
653 {
654 if (! right->type) {
655 if ((right->data.type != SDB_TYPE_STRING)
656 && (right->data.type != SDB_TYPE_REGEX))
657 return NULL;
659 if (right->data.type == SDB_TYPE_STRING) {
660 char *raw = right->data.data.string;
661 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &right->data))
662 return NULL;
663 free(raw);
664 }
665 }
666 return M(sdb_object_create("regex-matcher", cmp_type,
667 MATCHER_REGEX, left, right));
668 } /* sdb_store_regex_matcher */
670 sdb_store_matcher_t *
671 sdb_store_nregex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
672 {
673 sdb_store_matcher_t *m = sdb_store_regex_matcher(left, right);
674 if (! m)
675 return NULL;
676 m->type = MATCHER_NREGEX;
677 return m;
678 } /* sdb_store_nregex_matcher */
680 sdb_store_matcher_t *
681 sdb_store_isnull_matcher(sdb_store_expr_t *expr)
682 {
683 return M(sdb_object_create("isnull-matcher", isnull_type,
684 MATCHER_ISNULL, expr));
685 } /* sdb_store_isnull_matcher */
687 sdb_store_matcher_t *
688 sdb_store_isnnull_matcher(sdb_store_expr_t *expr)
689 {
690 return M(sdb_object_create("isnull-matcher", isnull_type,
691 MATCHER_ISNNULL, expr));
692 } /* sdb_store_isnnull_matcher */
694 sdb_store_matcher_op_cb
695 sdb_store_parse_matcher_op(const char *op)
696 {
697 if (! strcasecmp(op, "<"))
698 return sdb_store_lt_matcher;
699 else if (! strcasecmp(op, "<="))
700 return sdb_store_le_matcher;
701 else if (! strcasecmp(op, "="))
702 return sdb_store_eq_matcher;
703 else if (! strcasecmp(op, "!="))
704 return sdb_store_ne_matcher;
705 else if (! strcasecmp(op, ">="))
706 return sdb_store_ge_matcher;
707 else if (! strcasecmp(op, ">"))
708 return sdb_store_gt_matcher;
709 else if (! strcasecmp(op, "=~"))
710 return sdb_store_regex_matcher;
711 else if (! strcasecmp(op, "!~"))
712 return sdb_store_nregex_matcher;
713 return NULL;
714 } /* sdb_store_parse_matcher_op */
716 int
717 sdb_store_parse_object_type(const char *name)
718 {
719 if (! strcasecmp(name, "host"))
720 return SDB_HOST;
721 else if (! strcasecmp(name, "service"))
722 return SDB_SERVICE;
723 else if (! strcasecmp(name, "metric"))
724 return SDB_METRIC;
725 else if (! strcasecmp(name, "attribute"))
726 return SDB_ATTRIBUTE;
727 return -1;
728 } /* sdb_store_parse_object_type */
730 int
731 sdb_store_parse_object_type_plural(const char *name)
732 {
733 if (! strcasecmp(name, "hosts"))
734 return SDB_HOST;
735 else if (! strcasecmp(name, "services"))
736 return SDB_SERVICE;
737 else if (! strcasecmp(name, "metrics"))
738 return SDB_METRIC;
739 else if (! strcasecmp(name, "attributes"))
740 return SDB_ATTRIBUTE;
741 return -1;
742 } /* sdb_store_parse_object_type_plural */
744 int
745 sdb_store_parse_field_name(const char *name)
746 {
747 if (! strcasecmp(name, "name"))
748 return SDB_FIELD_NAME;
749 else if (! strcasecmp(name, "last_update"))
750 return SDB_FIELD_LAST_UPDATE;
751 else if (! strcasecmp(name, "age"))
752 return SDB_FIELD_AGE;
753 else if (! strcasecmp(name, "interval"))
754 return SDB_FIELD_INTERVAL;
755 else if (! strcasecmp(name, "backend"))
756 return SDB_FIELD_BACKEND;
757 return -1;
758 } /* sdb_store_parse_field_name */
760 sdb_store_matcher_t *
761 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
762 {
763 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
764 left, right));
765 } /* sdb_store_dis_matcher */
767 sdb_store_matcher_t *
768 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
769 {
770 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
771 left, right));
772 } /* sdb_store_con_matcher */
774 sdb_store_matcher_t *
775 sdb_store_inv_matcher(sdb_store_matcher_t *m)
776 {
777 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
778 } /* sdb_store_inv_matcher */
780 int
781 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
782 sdb_store_matcher_t *filter)
783 {
784 if (filter && (! sdb_store_matcher_matches(filter, obj, NULL)))
785 return 0;
787 /* "NULL" always matches */
788 if ((! m) || (! obj))
789 return 1;
791 if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
792 return 0;
794 return matchers[m->type](m, obj, filter);
795 } /* sdb_store_matcher_matches */
797 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */