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_backends(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
197 sdb_store_matcher_t *filter)
198 {
199 sdb_data_t op = SDB_DATA_INIT;
200 int status;
202 if ((ITER_M(m)->m->type < MATCHER_LT)
203 || (MATCHER_NREGEX < ITER_M(m)->m->type))
204 return 0;
206 if (sdb_store_expr_eval(CMP_M(ITER_M(m)->m)->right, obj, &op, filter))
207 return 0;
209 if (op.type & SDB_TYPE_ARRAY)
210 status = 0;
211 else if (sdb_data_isnull(&op))
212 status = 0;
213 else {
214 size_t i;
215 int all = (int)(m->type == MATCHER_ALL);
217 status = all;
218 for (i = 0; i < obj->backends_num; ++i) {
219 sdb_data_t v = { SDB_TYPE_STRING, { .string = obj->backends[i] } };
221 if (match_value(ITER_M(m)->m->type, &v, &op,
222 CMP_M(ITER_M(m)->m)->right->data_type < 0)) {
223 if (! all) {
224 status = 1;
225 break;
226 }
227 }
228 else if (all) {
229 status = 0;
230 break;
231 }
232 }
233 }
235 sdb_data_free_datum(&op);
236 return status;
237 } /* match_iter_backends */
239 static int
240 match_iter(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
241 sdb_store_matcher_t *filter)
242 {
243 sdb_avltree_iter_t *iter = NULL;
244 int type, status;
245 int all = (int)(m->type == MATCHER_ALL);
247 assert((m->type == MATCHER_ANY) || (m->type == MATCHER_ALL));
248 assert((! CMP_M(ITER_M(m)->m)->left) && CMP_M(ITER_M(m)->m)->right);
250 if (ITER_M(m)->iter->type == FIELD_VALUE) {
251 if (ITER_M(m)->iter->data.data.integer != SDB_FIELD_BACKEND)
252 return 0;
253 return match_iter_backends(m, obj, filter);
254 }
256 assert(ITER_M(m)->iter->type == TYPED_EXPR);
258 type = (int)ITER_M(m)->iter->data.data.integer;
259 if (obj->type == SDB_HOST) {
260 if (type == SDB_SERVICE)
261 iter = sdb_avltree_get_iter(HOST(obj)->services);
262 else if (type == SDB_METRIC)
263 iter = sdb_avltree_get_iter(HOST(obj)->metrics);
264 else if (type == SDB_ATTRIBUTE)
265 iter = sdb_avltree_get_iter(HOST(obj)->attributes);
266 } else if (obj->type == SDB_SERVICE) {
267 if (type == SDB_ATTRIBUTE)
268 iter = sdb_avltree_get_iter(SVC(obj)->attributes);
269 } else if (obj->type == SDB_METRIC) {
270 if (type == SDB_ATTRIBUTE)
271 iter = sdb_avltree_get_iter(METRIC(obj)->attributes);
272 }
274 status = all;
275 while (sdb_avltree_iter_has_next(iter)) {
276 sdb_store_obj_t *child = STORE_OBJ(sdb_avltree_iter_get_next(iter));
277 sdb_store_expr_t expr = EXPR_INIT;
278 sdb_data_t v = SDB_DATA_INIT;
279 bool matches;
281 if (filter && (! sdb_store_matcher_matches(filter, child, NULL)))
282 continue;
283 if (sdb_store_expr_eval(ITER_M(m)->iter, child, &v, filter))
284 continue;
286 expr.type = 0;
287 expr.data_type = v.type;
288 expr.data = v;
290 CMP_M(ITER_M(m)->m)->left = &expr;
291 matches = sdb_store_matcher_matches(ITER_M(m)->m, child, filter);
292 CMP_M(ITER_M(m)->m)->left = NULL;
293 sdb_data_free_datum(&v);
294 if (matches) {
295 if (! all) {
296 status = 1;
297 break;
298 }
299 } else if (all) {
300 status = 0;
301 break;
302 }
303 }
304 sdb_avltree_iter_destroy(iter);
305 return status;
306 } /* match_iter */
308 static int
309 match_cmp(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
310 sdb_store_matcher_t *filter)
311 {
312 sdb_store_expr_t *e1 = CMP_M(m)->left;
313 sdb_store_expr_t *e2 = CMP_M(m)->right;
314 sdb_data_t v1 = SDB_DATA_INIT, v2 = SDB_DATA_INIT;
315 int status;
317 assert((m->type == MATCHER_LT)
318 || (m->type == MATCHER_LE)
319 || (m->type == MATCHER_EQ)
320 || (m->type == MATCHER_NE)
321 || (m->type == MATCHER_GE)
322 || (m->type == MATCHER_GT));
323 assert(e1 && e2);
325 if (expr_eval2(e1, &v1, e2, &v2, obj, filter))
326 return 0;
328 status = match_cmp_value(m->type, &v1, &v2,
329 (e1->data_type) < 0 || (e2->data_type < 0));
331 expr_free_datum2(e1, &v1, e2, &v2);
332 return status;
333 } /* match_cmp */
335 static int
336 match_in(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
337 sdb_store_matcher_t *filter)
338 {
339 sdb_data_t value = SDB_DATA_INIT, array = SDB_DATA_INIT;
340 int status = 1;
342 assert((m->type == MATCHER_IN) || (m->type == MATCHER_NIN));
343 assert(CMP_M(m)->left && CMP_M(m)->right);
345 if (expr_eval2(CMP_M(m)->left, &value,
346 CMP_M(m)->right, &array, obj, filter))
347 status = 0;
349 if (status)
350 status = sdb_data_inarray(&value, &array);
352 expr_free_datum2(CMP_M(m)->left, &value, CMP_M(m)->right, &array);
353 if (m->type == MATCHER_NIN)
354 return !status;
355 return status;
356 } /* match_in */
358 static int
359 match_regex(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
360 sdb_store_matcher_t *filter)
361 {
362 sdb_data_t regex = SDB_DATA_INIT, v = SDB_DATA_INIT;
363 int status = 0;
365 assert((m->type == MATCHER_REGEX)
366 || (m->type == MATCHER_NREGEX));
367 assert(CMP_M(m)->left && CMP_M(m)->right);
369 if (expr_eval2(CMP_M(m)->left, &v, CMP_M(m)->right, ®ex, obj, filter))
370 return 0;
372 status = match_regex_value(m->type, &v, ®ex);
374 expr_free_datum2(CMP_M(m)->left, &v, CMP_M(m)->right, ®ex);
375 return status;
376 } /* match_regex */
378 static int
379 match_isnull(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
380 sdb_store_matcher_t *filter)
381 {
382 sdb_data_t v = SDB_DATA_INIT;
383 int status;
385 assert((m->type == MATCHER_ISNULL) || (m->type == MATCHER_ISNNULL));
387 if (ISNULL_M(m)->expr->type) {
388 /* TODO: this might hide real errors;
389 * improve error reporting and propagation */
390 if (sdb_store_expr_eval(ISNULL_M(m)->expr, obj, &v, filter))
391 return 1;
392 }
393 else
394 v = ISNULL_M(m)->expr->data;
396 if (sdb_data_isnull(&v))
397 status = 1;
398 else
399 status = 0;
401 if (ISNULL_M(m)->expr->type)
402 sdb_data_free_datum(&v);
403 if (m->type == MATCHER_ISNNULL)
404 return !status;
405 return status;
406 } /* match_isnull */
408 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_obj_t *,
409 sdb_store_matcher_t *);
411 /* this array needs to be indexable by the matcher types;
412 * -> update the enum in store-private.h when updating this */
413 static matcher_cb
414 matchers[] = {
415 match_logical,
416 match_logical,
417 match_unary,
418 match_iter,
419 match_iter,
420 match_in,
421 match_in,
423 /* unary operators */
424 match_isnull,
425 match_isnull,
427 /* ary operators */
428 match_cmp,
429 match_cmp,
430 match_cmp,
431 match_cmp,
432 match_cmp,
433 match_cmp,
434 match_regex,
435 match_regex,
436 };
438 /*
439 * private matcher types
440 */
442 static int
443 op_matcher_init(sdb_object_t *obj, va_list ap)
444 {
445 M(obj)->type = va_arg(ap, int);
446 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
447 return -1;
449 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
450 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
451 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
452 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
454 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
455 return -1;
456 return 0;
457 } /* op_matcher_init */
459 static void
460 op_matcher_destroy(sdb_object_t *obj)
461 {
462 if (OP_M(obj)->left)
463 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
464 if (OP_M(obj)->right)
465 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
466 } /* op_matcher_destroy */
468 static int
469 iter_matcher_init(sdb_object_t *obj, va_list ap)
470 {
471 M(obj)->type = va_arg(ap, int);
472 ITER_M(obj)->iter = va_arg(ap, sdb_store_expr_t *);
473 ITER_M(obj)->m = va_arg(ap, sdb_store_matcher_t *);
475 sdb_object_ref(SDB_OBJ(ITER_M(obj)->iter));
476 sdb_object_ref(SDB_OBJ(ITER_M(obj)->m));
478 if ((! ITER_M(obj)->iter) || (! ITER_M(obj)->m))
479 return -1;
480 return 0;
481 } /* iter_matcher_init */
483 static void
484 iter_matcher_destroy(sdb_object_t *obj)
485 {
486 sdb_object_deref(SDB_OBJ(ITER_M(obj)->iter));
487 sdb_object_deref(SDB_OBJ(ITER_M(obj)->m));
488 } /* iter_matcher_destroy */
490 static int
491 cmp_matcher_init(sdb_object_t *obj, va_list ap)
492 {
493 M(obj)->type = va_arg(ap, int);
495 CMP_M(obj)->left = va_arg(ap, sdb_store_expr_t *);
496 sdb_object_ref(SDB_OBJ(CMP_M(obj)->left));
497 CMP_M(obj)->right = va_arg(ap, sdb_store_expr_t *);
498 sdb_object_ref(SDB_OBJ(CMP_M(obj)->right));
500 if (! CMP_M(obj)->right)
501 return -1;
502 return 0;
503 } /* cmp_matcher_init */
505 static void
506 cmp_matcher_destroy(sdb_object_t *obj)
507 {
508 sdb_object_deref(SDB_OBJ(CMP_M(obj)->left));
509 sdb_object_deref(SDB_OBJ(CMP_M(obj)->right));
510 } /* cmp_matcher_destroy */
512 static int
513 uop_matcher_init(sdb_object_t *obj, va_list ap)
514 {
515 M(obj)->type = va_arg(ap, int);
516 if (M(obj)->type != MATCHER_NOT)
517 return -1;
519 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
520 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
522 if (! UOP_M(obj)->op)
523 return -1;
524 return 0;
525 } /* uop_matcher_init */
527 static void
528 uop_matcher_destroy(sdb_object_t *obj)
529 {
530 if (UOP_M(obj)->op)
531 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
532 } /* uop_matcher_destroy */
534 static int
535 isnull_matcher_init(sdb_object_t *obj, va_list ap)
536 {
537 M(obj)->type = va_arg(ap, int);
538 if ((M(obj)->type != MATCHER_ISNULL) && (M(obj)->type != MATCHER_ISNNULL))
539 return -1;
541 ISNULL_M(obj)->expr = va_arg(ap, sdb_store_expr_t *);
542 sdb_object_ref(SDB_OBJ(ISNULL_M(obj)->expr));
543 return 0;
544 } /* isnull_matcher_init */
546 static void
547 isnull_matcher_destroy(sdb_object_t *obj)
548 {
549 sdb_object_deref(SDB_OBJ(ISNULL_M(obj)->expr));
550 ISNULL_M(obj)->expr = NULL;
551 } /* isnull_matcher_destroy */
553 static sdb_type_t op_type = {
554 /* size = */ sizeof(op_matcher_t),
555 /* init = */ op_matcher_init,
556 /* destroy = */ op_matcher_destroy,
557 };
559 static sdb_type_t uop_type = {
560 /* size = */ sizeof(uop_matcher_t),
561 /* init = */ uop_matcher_init,
562 /* destroy = */ uop_matcher_destroy,
563 };
565 static sdb_type_t iter_type = {
566 /* size = */ sizeof(iter_matcher_t),
567 /* init = */ iter_matcher_init,
568 /* destroy = */ iter_matcher_destroy,
569 };
571 static sdb_type_t cmp_type = {
572 /* size = */ sizeof(cmp_matcher_t),
573 /* init = */ cmp_matcher_init,
574 /* destroy = */ cmp_matcher_destroy,
575 };
577 static sdb_type_t isnull_type = {
578 /* size = */ sizeof(isnull_matcher_t),
579 /* init = */ isnull_matcher_init,
580 /* destroy = */ isnull_matcher_destroy,
581 };
583 /*
584 * public API
585 */
587 sdb_store_matcher_t *
588 sdb_store_any_matcher(sdb_store_expr_t *iter, sdb_store_matcher_t *m)
589 {
590 if ((m->type < MATCHER_LT) || (MATCHER_NREGEX < m->type)) {
591 sdb_log(SDB_LOG_ERR, "store: Invalid ANY -> %s matcher "
592 "(invalid operator)", MATCHER_SYM(m->type));
593 return NULL;
594 }
595 if (CMP_M(m)->left) {
596 sdb_log(SDB_LOG_ERR, "store: Invalid ANY %s %s %s matcher "
597 "(invalid left operand)",
598 SDB_TYPE_TO_STRING(CMP_M(m)->left->data_type),
599 MATCHER_SYM(m->type),
600 SDB_TYPE_TO_STRING(CMP_M(m)->right->data_type));
601 return NULL;
602 }
603 return M(sdb_object_create("any-matcher", iter_type,
604 MATCHER_ANY, iter, m));
605 } /* sdb_store_any_matcher */
607 sdb_store_matcher_t *
608 sdb_store_all_matcher(sdb_store_expr_t *iter, sdb_store_matcher_t *m)
609 {
610 if ((m->type < MATCHER_LT) || (MATCHER_NREGEX < m->type)) {
611 sdb_log(SDB_LOG_ERR, "store: Invalid ALL -> %s matcher "
612 "(invalid operator)", MATCHER_SYM(m->type));
613 return NULL;
614 }
615 if (CMP_M(m)->left) {
616 sdb_log(SDB_LOG_ERR, "store: Invalid ALL %s %s %s matcher "
617 "(invalid left operand)",
618 SDB_TYPE_TO_STRING(CMP_M(m)->left->data_type),
619 MATCHER_SYM(m->type),
620 SDB_TYPE_TO_STRING(CMP_M(m)->right->data_type));
621 return NULL;
622 }
623 return M(sdb_object_create("all-matcher", iter_type,
624 MATCHER_ALL, iter, m));
625 } /* sdb_store_all_matcher */
627 sdb_store_matcher_t *
628 sdb_store_lt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
629 {
630 return M(sdb_object_create("lt-matcher", cmp_type,
631 MATCHER_LT, left, right));
632 } /* sdb_store_lt_matcher */
634 sdb_store_matcher_t *
635 sdb_store_le_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
636 {
637 return M(sdb_object_create("le-matcher", cmp_type,
638 MATCHER_LE, left, right));
639 } /* sdb_store_le_matcher */
641 sdb_store_matcher_t *
642 sdb_store_eq_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
643 {
644 return M(sdb_object_create("eq-matcher", cmp_type,
645 MATCHER_EQ, left, right));
646 } /* sdb_store_eq_matcher */
648 sdb_store_matcher_t *
649 sdb_store_ne_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
650 {
651 return M(sdb_object_create("ne-matcher", cmp_type,
652 MATCHER_NE, left, right));
653 } /* sdb_store_ne_matcher */
655 sdb_store_matcher_t *
656 sdb_store_ge_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
657 {
658 return M(sdb_object_create("ge-matcher", cmp_type,
659 MATCHER_GE, left, right));
660 } /* sdb_store_ge_matcher */
662 sdb_store_matcher_t *
663 sdb_store_gt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
664 {
665 return M(sdb_object_create("gt-matcher", cmp_type,
666 MATCHER_GT, left, right));
667 } /* sdb_store_gt_matcher */
669 sdb_store_matcher_t *
670 sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
671 {
672 return M(sdb_object_create("in-matcher", cmp_type,
673 MATCHER_IN, left, right));
674 } /* sdb_store_in_matcher */
676 sdb_store_matcher_t *
677 sdb_store_nin_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
678 {
679 return M(sdb_object_create("not-in-matcher", cmp_type,
680 MATCHER_NIN, left, right));
681 } /* sdb_store_in_matcher */
683 sdb_store_matcher_t *
684 sdb_store_regex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
685 {
686 if (! right->type) {
687 if ((right->data.type != SDB_TYPE_STRING)
688 && (right->data.type != SDB_TYPE_REGEX))
689 return NULL;
691 if (right->data.type == SDB_TYPE_STRING) {
692 char *raw = right->data.data.string;
693 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &right->data))
694 return NULL;
695 free(raw);
696 }
697 }
698 return M(sdb_object_create("regex-matcher", cmp_type,
699 MATCHER_REGEX, left, right));
700 } /* sdb_store_regex_matcher */
702 sdb_store_matcher_t *
703 sdb_store_nregex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
704 {
705 sdb_store_matcher_t *m = sdb_store_regex_matcher(left, right);
706 if (! m)
707 return NULL;
708 m->type = MATCHER_NREGEX;
709 return m;
710 } /* sdb_store_nregex_matcher */
712 sdb_store_matcher_t *
713 sdb_store_isnull_matcher(sdb_store_expr_t *expr)
714 {
715 return M(sdb_object_create("isnull-matcher", isnull_type,
716 MATCHER_ISNULL, expr));
717 } /* sdb_store_isnull_matcher */
719 sdb_store_matcher_t *
720 sdb_store_isnnull_matcher(sdb_store_expr_t *expr)
721 {
722 return M(sdb_object_create("isnull-matcher", isnull_type,
723 MATCHER_ISNNULL, expr));
724 } /* sdb_store_isnnull_matcher */
726 sdb_store_matcher_op_cb
727 sdb_store_parse_matcher_op(const char *op)
728 {
729 if (! strcasecmp(op, "<"))
730 return sdb_store_lt_matcher;
731 else if (! strcasecmp(op, "<="))
732 return sdb_store_le_matcher;
733 else if (! strcasecmp(op, "="))
734 return sdb_store_eq_matcher;
735 else if (! strcasecmp(op, "!="))
736 return sdb_store_ne_matcher;
737 else if (! strcasecmp(op, ">="))
738 return sdb_store_ge_matcher;
739 else if (! strcasecmp(op, ">"))
740 return sdb_store_gt_matcher;
741 else if (! strcasecmp(op, "=~"))
742 return sdb_store_regex_matcher;
743 else if (! strcasecmp(op, "!~"))
744 return sdb_store_nregex_matcher;
745 return NULL;
746 } /* sdb_store_parse_matcher_op */
748 int
749 sdb_store_parse_object_type(const char *name)
750 {
751 if (! strcasecmp(name, "host"))
752 return SDB_HOST;
753 else if (! strcasecmp(name, "service"))
754 return SDB_SERVICE;
755 else if (! strcasecmp(name, "metric"))
756 return SDB_METRIC;
757 else if (! strcasecmp(name, "attribute"))
758 return SDB_ATTRIBUTE;
759 return -1;
760 } /* sdb_store_parse_object_type */
762 int
763 sdb_store_parse_object_type_plural(const char *name)
764 {
765 if (! strcasecmp(name, "hosts"))
766 return SDB_HOST;
767 else if (! strcasecmp(name, "services"))
768 return SDB_SERVICE;
769 else if (! strcasecmp(name, "metrics"))
770 return SDB_METRIC;
771 else if (! strcasecmp(name, "attributes"))
772 return SDB_ATTRIBUTE;
773 return -1;
774 } /* sdb_store_parse_object_type_plural */
776 int
777 sdb_store_parse_field_name(const char *name)
778 {
779 if (! strcasecmp(name, "name"))
780 return SDB_FIELD_NAME;
781 else if (! strcasecmp(name, "last_update"))
782 return SDB_FIELD_LAST_UPDATE;
783 else if (! strcasecmp(name, "age"))
784 return SDB_FIELD_AGE;
785 else if (! strcasecmp(name, "interval"))
786 return SDB_FIELD_INTERVAL;
787 else if (! strcasecmp(name, "backend"))
788 return SDB_FIELD_BACKEND;
789 return -1;
790 } /* sdb_store_parse_field_name */
792 sdb_store_matcher_t *
793 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
794 {
795 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
796 left, right));
797 } /* sdb_store_dis_matcher */
799 sdb_store_matcher_t *
800 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
801 {
802 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
803 left, right));
804 } /* sdb_store_con_matcher */
806 sdb_store_matcher_t *
807 sdb_store_inv_matcher(sdb_store_matcher_t *m)
808 {
809 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
810 } /* sdb_store_inv_matcher */
812 int
813 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
814 sdb_store_matcher_t *filter)
815 {
816 if (filter && (! sdb_store_matcher_matches(filter, obj, NULL)))
817 return 0;
819 /* "NULL" always matches */
820 if ((! m) || (! obj))
821 return 1;
823 if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
824 return 0;
826 return matchers[m->type](m, obj, filter);
827 } /* sdb_store_matcher_matches */
829 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */