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 * matcher implementations
54 */
56 /*
57 * cmp_expr:
58 * Compare two values using the specified matcher operator. If strcmp_fallback
59 * is enabled, compare the string values in case of a type mismatch.
60 */
61 static int
62 match_cmp_value(int op, sdb_data_t *v1, sdb_data_t *v2, _Bool strcmp_fallback)
63 {
64 int status;
66 if (sdb_data_isnull(v1) || (sdb_data_isnull(v2)))
67 status = INT_MAX;
68 else if (v1->type == v2->type)
69 status = sdb_data_cmp(v1, v2);
70 else if (! strcmp_fallback)
71 status = INT_MAX;
72 else
73 status = sdb_data_strcmp(v1, v2);
75 if (status == INT_MAX)
76 return 0;
77 else if (op == MATCHER_LT)
78 return status < 0;
79 else if (op == MATCHER_LE)
80 return status <= 0;
81 else if (op == MATCHER_EQ)
82 return status == 0;
83 else if (op == MATCHER_NE)
84 return status != 0;
85 else if (op == MATCHER_GE)
86 return status >= 0;
87 else if (op == MATCHER_GT)
88 return status > 0;
89 return 0;
90 } /* match_cmp_value */
92 static int
93 match_regex_value(int op, sdb_data_t *v, sdb_data_t *re)
94 {
95 char value[sdb_data_strlen(v) + 1];
96 int status = 0;
98 assert((op == MATCHER_REGEX)
99 || (op == MATCHER_NREGEX));
101 if (sdb_data_isnull(v) || sdb_data_isnull(re))
102 return 0;
104 if (re->type == SDB_TYPE_STRING) {
105 sdb_data_t tmp = SDB_DATA_INIT;
107 if (sdb_data_parse(re->data.string, SDB_TYPE_REGEX, &tmp))
108 return 0;
110 sdb_data_free_datum(re);
111 *re = tmp;
112 }
113 else if (re->type != SDB_TYPE_REGEX)
114 return 0;
116 if (sdb_data_format(v, value, sizeof(value), SDB_UNQUOTED) < 0)
117 status = 0;
118 else if (! regexec(&re->data.re.regex, value, 0, NULL, 0))
119 status = 1;
121 if (op == MATCHER_NREGEX)
122 return !status;
123 return status;
124 } /* match_regex_value */
126 static int
127 match_value(int op, sdb_data_t *v1, sdb_data_t *v2, _Bool strcmp_fallback)
128 {
129 if ((op == MATCHER_REGEX) || (op == MATCHER_NREGEX))
130 return match_regex_value(op, v1, v2);
131 return match_cmp_value(op, v1, v2, strcmp_fallback);
132 } /* match_value */
134 static int
135 match_logical(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
136 sdb_store_matcher_t *filter)
137 {
138 int status;
140 assert((m->type == MATCHER_AND) || (m->type == MATCHER_OR));
141 assert(OP_M(m)->left && OP_M(m)->right);
143 status = sdb_store_matcher_matches(OP_M(m)->left, obj, filter);
145 /* lazy evaluation */
146 if ((! status) && (m->type == MATCHER_AND))
147 return status;
148 else if (status && (m->type == MATCHER_OR))
149 return status;
151 return sdb_store_matcher_matches(OP_M(m)->right, obj, filter);
152 } /* match_logical */
154 static int
155 match_unary(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
156 sdb_store_matcher_t *filter)
157 {
158 assert(m->type == MATCHER_NOT);
159 assert(UOP_M(m)->op);
161 return !sdb_store_matcher_matches(UOP_M(m)->op, obj, filter);
162 } /* match_unary */
164 /* iterate arrays: ANY/ALL <array> <cmp> <value> */
165 static int
166 match_iter_array(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
167 sdb_store_matcher_t *filter)
168 {
169 sdb_store_expr_t *e1, *e2;
170 sdb_data_t v1 = SDB_DATA_INIT;
171 sdb_data_t v2 = SDB_DATA_INIT;
173 int status;
175 if ((ITER_M(m)->m->type < MATCHER_LT)
176 || (MATCHER_NREGEX < ITER_M(m)->m->type))
177 return 0;
179 e1 = CMP_M(ITER_M(m)->m)->left;
180 e2 = CMP_M(ITER_M(m)->m)->right;
182 if (sdb_store_expr_eval(e1, obj, &v1, filter))
183 return 0;
184 if (sdb_store_expr_eval(e2, obj, &v2, filter)) {
185 sdb_data_free_datum(&v1);
186 return 0;
187 }
189 if ((! (v1.type & SDB_TYPE_ARRAY)) || (v2.type & SDB_TYPE_ARRAY))
190 status = 0;
191 else if (sdb_data_isnull(&v1) || (sdb_data_isnull(&v2)))
192 status = 0;
193 else {
194 size_t i;
195 int all = (int)(m->type == MATCHER_ALL);
197 status = all;
198 for (i = 0; i < v1.data.array.length; ++i) {
199 sdb_data_t v = SDB_DATA_INIT;
200 if (sdb_data_array_get(&v1, i, &v)) {
201 status = 0;
202 break;
203 }
205 if (match_value(ITER_M(m)->m->type, &v, &v2,
206 (e1->data_type) < 0 || (e2->data_type < 0))) {
207 if (! all) {
208 status = 1;
209 break;
210 }
211 }
212 else if (all) {
213 status = 0;
214 break;
215 }
216 }
217 }
219 sdb_data_free_datum(&v1);
220 sdb_data_free_datum(&v2);
221 return status;
222 } /* match_iter_array */
224 static int
225 match_iter(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
226 sdb_store_matcher_t *filter)
227 {
228 sdb_avltree_iter_t *iter = NULL;
229 int status;
230 int all = (int)(m->type == MATCHER_ALL);
232 assert((m->type == MATCHER_ANY) || (m->type == MATCHER_ALL));
234 if (ITER_M(m)->type == SDB_FIELD_BACKEND)
235 return match_iter_array(m, obj, filter);
237 if (obj->type == SDB_HOST) {
238 if (ITER_M(m)->type == SDB_SERVICE)
239 iter = sdb_avltree_get_iter(HOST(obj)->services);
240 else if (ITER_M(m)->type == SDB_METRIC)
241 iter = sdb_avltree_get_iter(HOST(obj)->metrics);
242 else if (ITER_M(m)->type == SDB_ATTRIBUTE)
243 iter = sdb_avltree_get_iter(HOST(obj)->attributes);
244 } else if (obj->type == SDB_SERVICE) {
245 if (ITER_M(m)->type == SDB_ATTRIBUTE)
246 iter = sdb_avltree_get_iter(SVC(obj)->attributes);
247 } else if (obj->type == SDB_METRIC) {
248 if (ITER_M(m)->type == SDB_ATTRIBUTE)
249 iter = sdb_avltree_get_iter(METRIC(obj)->attributes);
250 }
252 status = all;
253 while (sdb_avltree_iter_has_next(iter)) {
254 sdb_store_obj_t *child = STORE_OBJ(sdb_avltree_iter_get_next(iter));
255 if (filter && (! sdb_store_matcher_matches(filter, child, NULL)))
256 continue;
258 if (sdb_store_matcher_matches(ITER_M(m)->m, child, filter)) {
259 if (! all) {
260 status = 1;
261 break;
262 }
263 } else if (all) {
264 status = 0;
265 break;
266 }
267 }
268 sdb_avltree_iter_destroy(iter);
269 return status;
270 } /* match_iter */
272 static int
273 match_cmp(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
274 sdb_store_matcher_t *filter)
275 {
276 sdb_store_expr_t *e1 = CMP_M(m)->left;
277 sdb_store_expr_t *e2 = CMP_M(m)->right;
278 sdb_data_t v1 = SDB_DATA_INIT, v2 = SDB_DATA_INIT;
279 int status;
281 assert((m->type == MATCHER_LT)
282 || (m->type == MATCHER_LE)
283 || (m->type == MATCHER_EQ)
284 || (m->type == MATCHER_NE)
285 || (m->type == MATCHER_GE)
286 || (m->type == MATCHER_GT));
288 if (sdb_store_expr_eval(e1, obj, &v1, filter))
289 return 0;
290 if (sdb_store_expr_eval(e2, obj, &v2, filter)) {
291 sdb_data_free_datum(&v1);
292 return 0;
293 }
295 status = match_cmp_value(m->type, &v1, &v2,
296 (e1->data_type) < 0 || (e2->data_type < 0));
298 sdb_data_free_datum(&v1);
299 sdb_data_free_datum(&v2);
300 return status;
301 } /* match_cmp */
303 static int
304 match_in(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
305 sdb_store_matcher_t *filter)
306 {
307 sdb_data_t value = SDB_DATA_INIT, array = SDB_DATA_INIT;
308 int status = 1;
310 assert(m->type == MATCHER_IN);
312 if ((sdb_store_expr_eval(CMP_M(m)->left, obj, &value, filter))
313 || (sdb_store_expr_eval(CMP_M(m)->right, obj, &array, filter)))
314 status = 0;
316 if (status)
317 status = sdb_data_inarray(&value, &array);
319 sdb_data_free_datum(&value);
320 sdb_data_free_datum(&array);
321 return status;
322 } /* match_in */
324 static int
325 match_regex(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
326 sdb_store_matcher_t *filter)
327 {
328 sdb_data_t regex = SDB_DATA_INIT, v = SDB_DATA_INIT;
329 int status = 0;
331 assert((m->type == MATCHER_REGEX)
332 || (m->type == MATCHER_NREGEX));
334 if (sdb_store_expr_eval(CMP_M(m)->left, obj, &v, filter))
335 return 0;
336 else if (! CMP_M(m)->right->type)
337 regex = CMP_M(m)->right->data;
338 else if (sdb_store_expr_eval(CMP_M(m)->right, obj, ®ex, filter)) {
339 sdb_data_free_datum(&v);
340 return 0;
341 }
343 status = match_regex_value(m->type, &v, ®ex);
345 sdb_data_free_datum(&v);
346 if (CMP_M(m)->right->type)
347 sdb_data_free_datum(®ex);
348 return status;
349 } /* match_regex */
351 static int
352 match_isnull(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
353 sdb_store_matcher_t *filter)
354 {
355 sdb_data_t v = SDB_DATA_INIT;
356 int status;
358 assert((m->type == MATCHER_ISNULL) || (m->type == MATCHER_ISNNULL));
360 /* TODO: this might hide real errors;
361 * improve error reporting and propagation */
362 if (sdb_store_expr_eval(ISNULL_M(m)->expr, obj, &v, filter)
363 || sdb_data_isnull(&v))
364 status = 1;
365 else
366 status = 0;
368 sdb_data_free_datum(&v);
369 if (m->type == MATCHER_ISNNULL)
370 return !status;
371 return status;
372 } /* match_isnull */
374 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_obj_t *,
375 sdb_store_matcher_t *);
377 /* this array needs to be indexable by the matcher types;
378 * -> update the enum in store-private.h when updating this */
379 static matcher_cb
380 matchers[] = {
381 match_logical,
382 match_logical,
383 match_unary,
384 match_iter,
385 match_iter,
386 match_in,
388 /* unary operators */
389 match_isnull,
390 match_isnull,
392 /* ary operators */
393 match_cmp,
394 match_cmp,
395 match_cmp,
396 match_cmp,
397 match_cmp,
398 match_cmp,
399 match_regex,
400 match_regex,
401 };
403 /*
404 * private matcher types
405 */
407 static int
408 op_matcher_init(sdb_object_t *obj, va_list ap)
409 {
410 M(obj)->type = va_arg(ap, int);
411 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
412 return -1;
414 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
415 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
416 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
417 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
419 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
420 return -1;
421 return 0;
422 } /* op_matcher_init */
424 static void
425 op_matcher_destroy(sdb_object_t *obj)
426 {
427 if (OP_M(obj)->left)
428 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
429 if (OP_M(obj)->right)
430 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
431 } /* op_matcher_destroy */
433 static int
434 iter_matcher_init(sdb_object_t *obj, va_list ap)
435 {
436 M(obj)->type = va_arg(ap, int);
437 ITER_M(obj)->type = va_arg(ap, int);
438 ITER_M(obj)->m = va_arg(ap, sdb_store_matcher_t *);
440 if (! ITER_M(obj)->m)
441 return -1;
443 sdb_object_ref(SDB_OBJ(ITER_M(obj)->m));
444 return 0;
445 } /* iter_matcher_init */
447 static void
448 iter_matcher_destroy(sdb_object_t *obj)
449 {
450 sdb_object_deref(SDB_OBJ(ITER_M(obj)->m));
451 } /* iter_matcher_destroy */
453 static int
454 cmp_matcher_init(sdb_object_t *obj, va_list ap)
455 {
456 M(obj)->type = va_arg(ap, int);
458 CMP_M(obj)->left = va_arg(ap, sdb_store_expr_t *);
459 sdb_object_ref(SDB_OBJ(CMP_M(obj)->left));
460 CMP_M(obj)->right = va_arg(ap, sdb_store_expr_t *);
461 sdb_object_ref(SDB_OBJ(CMP_M(obj)->right));
463 if ((! CMP_M(obj)->left) || (! CMP_M(obj)->right))
464 return -1;
465 return 0;
466 } /* cmp_matcher_init */
468 static void
469 cmp_matcher_destroy(sdb_object_t *obj)
470 {
471 sdb_object_deref(SDB_OBJ(CMP_M(obj)->left));
472 sdb_object_deref(SDB_OBJ(CMP_M(obj)->right));
473 } /* cmp_matcher_destroy */
475 static int
476 uop_matcher_init(sdb_object_t *obj, va_list ap)
477 {
478 M(obj)->type = va_arg(ap, int);
479 if (M(obj)->type != MATCHER_NOT)
480 return -1;
482 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
483 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
485 if (! UOP_M(obj)->op)
486 return -1;
487 return 0;
488 } /* uop_matcher_init */
490 static void
491 uop_matcher_destroy(sdb_object_t *obj)
492 {
493 if (UOP_M(obj)->op)
494 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
495 } /* uop_matcher_destroy */
497 static int
498 isnull_matcher_init(sdb_object_t *obj, va_list ap)
499 {
500 M(obj)->type = va_arg(ap, int);
501 if ((M(obj)->type != MATCHER_ISNULL) && (M(obj)->type != MATCHER_ISNNULL))
502 return -1;
504 ISNULL_M(obj)->expr = va_arg(ap, sdb_store_expr_t *);
505 sdb_object_ref(SDB_OBJ(ISNULL_M(obj)->expr));
506 return 0;
507 } /* isnull_matcher_init */
509 static void
510 isnull_matcher_destroy(sdb_object_t *obj)
511 {
512 sdb_object_deref(SDB_OBJ(ISNULL_M(obj)->expr));
513 ISNULL_M(obj)->expr = NULL;
514 } /* isnull_matcher_destroy */
516 static sdb_type_t op_type = {
517 /* size = */ sizeof(op_matcher_t),
518 /* init = */ op_matcher_init,
519 /* destroy = */ op_matcher_destroy,
520 };
522 static sdb_type_t uop_type = {
523 /* size = */ sizeof(uop_matcher_t),
524 /* init = */ uop_matcher_init,
525 /* destroy = */ uop_matcher_destroy,
526 };
528 static sdb_type_t iter_type = {
529 /* size = */ sizeof(iter_matcher_t),
530 /* init = */ iter_matcher_init,
531 /* destroy = */ iter_matcher_destroy,
532 };
534 static sdb_type_t cmp_type = {
535 /* size = */ sizeof(cmp_matcher_t),
536 /* init = */ cmp_matcher_init,
537 /* destroy = */ cmp_matcher_destroy,
538 };
540 static sdb_type_t isnull_type = {
541 /* size = */ sizeof(isnull_matcher_t),
542 /* init = */ isnull_matcher_init,
543 /* destroy = */ isnull_matcher_destroy,
544 };
546 /*
547 * public API
548 */
550 sdb_store_matcher_t *
551 sdb_store_any_matcher(int type, sdb_store_matcher_t *m)
552 {
553 if ((type != SDB_SERVICE) && (type != SDB_METRIC)
554 && (type != SDB_ATTRIBUTE) && (type != SDB_FIELD_BACKEND))
555 return NULL;
556 return M(sdb_object_create("any-matcher", iter_type,
557 MATCHER_ANY, type, m));
558 } /* sdb_store_any_matcher */
560 sdb_store_matcher_t *
561 sdb_store_all_matcher(int type, sdb_store_matcher_t *m)
562 {
563 if ((type != SDB_SERVICE) && (type != SDB_METRIC)
564 && (type != SDB_ATTRIBUTE) && (type != SDB_FIELD_BACKEND))
565 return NULL;
566 return M(sdb_object_create("all-matcher", iter_type,
567 MATCHER_ALL, type, m));
568 } /* sdb_store_all_matcher */
570 sdb_store_matcher_t *
571 sdb_store_lt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
572 {
573 return M(sdb_object_create("lt-matcher", cmp_type,
574 MATCHER_LT, left, right));
575 } /* sdb_store_lt_matcher */
577 sdb_store_matcher_t *
578 sdb_store_le_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
579 {
580 return M(sdb_object_create("le-matcher", cmp_type,
581 MATCHER_LE, left, right));
582 } /* sdb_store_le_matcher */
584 sdb_store_matcher_t *
585 sdb_store_eq_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
586 {
587 return M(sdb_object_create("eq-matcher", cmp_type,
588 MATCHER_EQ, left, right));
589 } /* sdb_store_eq_matcher */
591 sdb_store_matcher_t *
592 sdb_store_ne_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
593 {
594 return M(sdb_object_create("ne-matcher", cmp_type,
595 MATCHER_NE, left, right));
596 } /* sdb_store_ne_matcher */
598 sdb_store_matcher_t *
599 sdb_store_ge_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
600 {
601 return M(sdb_object_create("ge-matcher", cmp_type,
602 MATCHER_GE, left, right));
603 } /* sdb_store_ge_matcher */
605 sdb_store_matcher_t *
606 sdb_store_gt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
607 {
608 return M(sdb_object_create("gt-matcher", cmp_type,
609 MATCHER_GT, left, right));
610 } /* sdb_store_gt_matcher */
612 sdb_store_matcher_t *
613 sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
614 {
615 return M(sdb_object_create("in-matcher", cmp_type,
616 MATCHER_IN, left, right));
617 } /* sdb_store_in_matcher */
619 sdb_store_matcher_t *
620 sdb_store_regex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
621 {
622 if (! right->type) {
623 if ((right->data.type != SDB_TYPE_STRING)
624 && (right->data.type != SDB_TYPE_REGEX))
625 return NULL;
627 if (right->data.type == SDB_TYPE_STRING) {
628 char *raw = right->data.data.string;
629 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &right->data))
630 return NULL;
631 free(raw);
632 }
633 }
634 return M(sdb_object_create("regex-matcher", cmp_type,
635 MATCHER_REGEX, left, right));
636 } /* sdb_store_regex_matcher */
638 sdb_store_matcher_t *
639 sdb_store_nregex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
640 {
641 sdb_store_matcher_t *m = sdb_store_regex_matcher(left, right);
642 if (! m)
643 return NULL;
644 m->type = MATCHER_NREGEX;
645 return m;
646 } /* sdb_store_nregex_matcher */
648 sdb_store_matcher_t *
649 sdb_store_isnull_matcher(sdb_store_expr_t *expr)
650 {
651 return M(sdb_object_create("isnull-matcher", isnull_type,
652 MATCHER_ISNULL, expr));
653 } /* sdb_store_isnull_matcher */
655 sdb_store_matcher_t *
656 sdb_store_isnnull_matcher(sdb_store_expr_t *expr)
657 {
658 return M(sdb_object_create("isnull-matcher", isnull_type,
659 MATCHER_ISNNULL, expr));
660 } /* sdb_store_isnnull_matcher */
662 sdb_store_matcher_op_cb
663 sdb_store_parse_matcher_op(const char *op)
664 {
665 if (! strcasecmp(op, "<"))
666 return sdb_store_lt_matcher;
667 else if (! strcasecmp(op, "<="))
668 return sdb_store_le_matcher;
669 else if (! strcasecmp(op, "="))
670 return sdb_store_eq_matcher;
671 else if (! strcasecmp(op, "!="))
672 return sdb_store_ne_matcher;
673 else if (! strcasecmp(op, ">="))
674 return sdb_store_ge_matcher;
675 else if (! strcasecmp(op, ">"))
676 return sdb_store_gt_matcher;
677 else if (! strcasecmp(op, "=~"))
678 return sdb_store_regex_matcher;
679 else if (! strcasecmp(op, "!~"))
680 return sdb_store_nregex_matcher;
681 return NULL;
682 } /* sdb_store_parse_matcher_op */
684 int
685 sdb_store_parse_object_type(const char *name)
686 {
687 if (! strcasecmp(name, "host"))
688 return SDB_HOST;
689 else if (! strcasecmp(name, "service"))
690 return SDB_SERVICE;
691 else if (! strcasecmp(name, "metric"))
692 return SDB_METRIC;
693 else if (! strcasecmp(name, "attribute"))
694 return SDB_ATTRIBUTE;
695 return -1;
696 } /* sdb_store_parse_object_type */
698 int
699 sdb_store_parse_object_type_plural(const char *name)
700 {
701 if (! strcasecmp(name, "hosts"))
702 return SDB_HOST;
703 else if (! strcasecmp(name, "services"))
704 return SDB_SERVICE;
705 else if (! strcasecmp(name, "metrics"))
706 return SDB_METRIC;
707 else if (! strcasecmp(name, "attributes"))
708 return SDB_ATTRIBUTE;
709 return -1;
710 } /* sdb_store_parse_object_type_plural */
712 int
713 sdb_store_parse_field_name(const char *name)
714 {
715 if (! strcasecmp(name, "name"))
716 return SDB_FIELD_NAME;
717 else if (! strcasecmp(name, "last_update"))
718 return SDB_FIELD_LAST_UPDATE;
719 else if (! strcasecmp(name, "age"))
720 return SDB_FIELD_AGE;
721 else if (! strcasecmp(name, "interval"))
722 return SDB_FIELD_INTERVAL;
723 else if (! strcasecmp(name, "backend"))
724 return SDB_FIELD_BACKEND;
725 return -1;
726 } /* sdb_store_parse_field_name */
728 sdb_store_matcher_t *
729 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
730 {
731 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
732 left, right));
733 } /* sdb_store_dis_matcher */
735 sdb_store_matcher_t *
736 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
737 {
738 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
739 left, right));
740 } /* sdb_store_con_matcher */
742 sdb_store_matcher_t *
743 sdb_store_inv_matcher(sdb_store_matcher_t *m)
744 {
745 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
746 } /* sdb_store_inv_matcher */
748 int
749 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
750 sdb_store_matcher_t *filter)
751 {
752 if (filter && (! sdb_store_matcher_matches(filter, obj, NULL)))
753 return 0;
755 /* "NULL" always matches */
756 if ((! m) || (! obj))
757 return 1;
759 if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
760 return 0;
762 return matchers[m->type](m, obj, filter);
763 } /* sdb_store_matcher_matches */
765 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */