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_logical(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
158 sdb_store_matcher_t *filter)
159 {
160 int status;
162 assert((m->type == MATCHER_AND) || (m->type == MATCHER_OR));
163 assert(OP_M(m)->left && OP_M(m)->right);
165 status = sdb_store_matcher_matches(OP_M(m)->left, obj, filter);
167 /* lazy evaluation */
168 if ((! status) && (m->type == MATCHER_AND))
169 return status;
170 else if (status && (m->type == MATCHER_OR))
171 return status;
173 return sdb_store_matcher_matches(OP_M(m)->right, obj, filter);
174 } /* match_logical */
176 static int
177 match_uop(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
178 sdb_store_matcher_t *filter)
179 {
180 assert(m->type == MATCHER_NOT);
181 assert(UOP_M(m)->op);
183 return !sdb_store_matcher_matches(UOP_M(m)->op, obj, filter);
184 } /* match_uop */
186 /* iterate: ANY/ALL <iter> <cmp> <value> */
187 static int
188 match_iter(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
189 sdb_store_matcher_t *filter)
190 {
191 sdb_store_expr_iter_t *iter = NULL;
192 int status;
193 int all = (int)(m->type == MATCHER_ALL);
195 assert((m->type == MATCHER_ANY) || (m->type == MATCHER_ALL));
196 assert((! CMP_M(ITER_M(m)->m)->left) && CMP_M(ITER_M(m)->m)->right);
198 iter = sdb_store_expr_iter(ITER_M(m)->iter, obj, filter);
199 if (! iter)
200 return 0;
202 status = all;
203 while (sdb_store_expr_iter_has_next(iter)) {
204 sdb_data_t v = sdb_store_expr_iter_get_next(iter);
205 sdb_store_expr_t expr = CONST_EXPR(v);
206 bool matches;
208 CMP_M(ITER_M(m)->m)->left = &expr;
209 matches = sdb_store_matcher_matches(ITER_M(m)->m, obj, filter);
210 CMP_M(ITER_M(m)->m)->left = NULL;
211 sdb_data_free_datum(&v);
213 if (matches) {
214 if (! all) {
215 status = 1;
216 break;
217 }
218 } else if (all) {
219 status = 0;
220 break;
221 }
222 }
223 sdb_store_expr_iter_destroy(iter);
224 return status;
225 } /* match_iter */
227 static int
228 match_cmp(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
229 sdb_store_matcher_t *filter)
230 {
231 sdb_store_expr_t *e1 = CMP_M(m)->left;
232 sdb_store_expr_t *e2 = CMP_M(m)->right;
233 sdb_data_t v1 = SDB_DATA_INIT, v2 = SDB_DATA_INIT;
234 int status;
236 assert((m->type == MATCHER_LT)
237 || (m->type == MATCHER_LE)
238 || (m->type == MATCHER_EQ)
239 || (m->type == MATCHER_NE)
240 || (m->type == MATCHER_GE)
241 || (m->type == MATCHER_GT));
242 assert(e1 && e2);
244 if (expr_eval2(e1, &v1, e2, &v2, obj, filter))
245 return 0;
247 status = match_cmp_value(m->type, &v1, &v2,
248 (e1->data_type) < 0 || (e2->data_type < 0));
250 expr_free_datum2(e1, &v1, e2, &v2);
251 return status;
252 } /* match_cmp */
254 static int
255 match_in(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
256 sdb_store_matcher_t *filter)
257 {
258 sdb_data_t value = SDB_DATA_INIT, array = SDB_DATA_INIT;
259 int status = 1;
261 assert(m->type == MATCHER_IN);
262 assert(CMP_M(m)->left && CMP_M(m)->right);
264 if (expr_eval2(CMP_M(m)->left, &value,
265 CMP_M(m)->right, &array, obj, filter))
266 status = 0;
268 if (status)
269 status = sdb_data_inarray(&value, &array);
271 expr_free_datum2(CMP_M(m)->left, &value, CMP_M(m)->right, &array);
272 return status;
273 } /* match_in */
275 static int
276 match_regex(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
277 sdb_store_matcher_t *filter)
278 {
279 sdb_data_t regex = SDB_DATA_INIT, v = SDB_DATA_INIT;
280 int status = 0;
282 assert((m->type == MATCHER_REGEX)
283 || (m->type == MATCHER_NREGEX));
284 assert(CMP_M(m)->left && CMP_M(m)->right);
286 if (expr_eval2(CMP_M(m)->left, &v, CMP_M(m)->right, ®ex, obj, filter))
287 return 0;
289 status = match_regex_value(m->type, &v, ®ex);
291 expr_free_datum2(CMP_M(m)->left, &v, CMP_M(m)->right, ®ex);
292 return status;
293 } /* match_regex */
295 static int
296 match_unary(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
297 sdb_store_matcher_t *filter)
298 {
299 sdb_data_t v = SDB_DATA_INIT;
300 int status;
302 assert((m->type == MATCHER_ISNULL)
303 || (m->type == MATCHER_ISTRUE)
304 || (m->type == MATCHER_ISFALSE));
306 if (UNARY_M(m)->expr->type) {
307 /* TODO: this might hide real errors;
308 * improve error reporting and propagation */
309 if (sdb_store_expr_eval(UNARY_M(m)->expr, obj, &v, filter))
310 return 1;
311 }
312 else
313 v = UNARY_M(m)->expr->data;
315 if (m->type == MATCHER_ISNULL)
316 status = sdb_data_isnull(&v) ? 1 : 0;
317 else { /* ISTRUE or ISFALSE */
318 if ((v.type == SDB_TYPE_BOOLEAN)
319 && (v.data.boolean == (m->type == MATCHER_ISTRUE)))
320 status = 1;
321 else
322 status = 0;
323 }
325 if (UNARY_M(m)->expr->type)
326 sdb_data_free_datum(&v);
327 return status;
328 } /* match_unary */
330 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_obj_t *,
331 sdb_store_matcher_t *);
333 /* this array needs to be indexable by the matcher types;
334 * -> update the enum in store-private.h when updating this */
335 static matcher_cb
336 matchers[] = {
337 match_logical,
338 match_logical,
339 match_uop,
340 match_iter,
341 match_iter,
342 match_in,
344 /* unary operators */
345 match_unary,
346 match_unary,
347 match_unary,
349 /* ary operators */
350 match_cmp,
351 match_cmp,
352 match_cmp,
353 match_cmp,
354 match_cmp,
355 match_cmp,
356 match_regex,
357 match_regex,
359 NULL, /* QUERY */
360 };
362 /*
363 * private matcher types
364 */
366 static int
367 op_matcher_init(sdb_object_t *obj, va_list ap)
368 {
369 M(obj)->type = va_arg(ap, int);
370 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
371 return -1;
373 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
374 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
375 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
376 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
378 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
379 return -1;
380 return 0;
381 } /* op_matcher_init */
383 static void
384 op_matcher_destroy(sdb_object_t *obj)
385 {
386 if (OP_M(obj)->left)
387 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
388 if (OP_M(obj)->right)
389 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
390 } /* op_matcher_destroy */
392 static int
393 iter_matcher_init(sdb_object_t *obj, va_list ap)
394 {
395 M(obj)->type = va_arg(ap, int);
396 ITER_M(obj)->iter = va_arg(ap, sdb_store_expr_t *);
397 ITER_M(obj)->m = va_arg(ap, sdb_store_matcher_t *);
399 sdb_object_ref(SDB_OBJ(ITER_M(obj)->iter));
400 sdb_object_ref(SDB_OBJ(ITER_M(obj)->m));
402 if ((! ITER_M(obj)->iter) || (! ITER_M(obj)->m))
403 return -1;
404 return 0;
405 } /* iter_matcher_init */
407 static void
408 iter_matcher_destroy(sdb_object_t *obj)
409 {
410 sdb_object_deref(SDB_OBJ(ITER_M(obj)->iter));
411 sdb_object_deref(SDB_OBJ(ITER_M(obj)->m));
412 } /* iter_matcher_destroy */
414 static int
415 cmp_matcher_init(sdb_object_t *obj, va_list ap)
416 {
417 M(obj)->type = va_arg(ap, int);
419 CMP_M(obj)->left = va_arg(ap, sdb_store_expr_t *);
420 sdb_object_ref(SDB_OBJ(CMP_M(obj)->left));
421 CMP_M(obj)->right = va_arg(ap, sdb_store_expr_t *);
422 sdb_object_ref(SDB_OBJ(CMP_M(obj)->right));
424 if (! CMP_M(obj)->right)
425 return -1;
426 return 0;
427 } /* cmp_matcher_init */
429 static void
430 cmp_matcher_destroy(sdb_object_t *obj)
431 {
432 sdb_object_deref(SDB_OBJ(CMP_M(obj)->left));
433 sdb_object_deref(SDB_OBJ(CMP_M(obj)->right));
434 } /* cmp_matcher_destroy */
436 static int
437 uop_matcher_init(sdb_object_t *obj, va_list ap)
438 {
439 M(obj)->type = va_arg(ap, int);
440 if (M(obj)->type != MATCHER_NOT)
441 return -1;
443 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
444 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
446 if (! UOP_M(obj)->op)
447 return -1;
448 return 0;
449 } /* uop_matcher_init */
451 static void
452 uop_matcher_destroy(sdb_object_t *obj)
453 {
454 if (UOP_M(obj)->op)
455 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
456 } /* uop_matcher_destroy */
458 static int
459 unary_matcher_init(sdb_object_t *obj, va_list ap)
460 {
461 M(obj)->type = va_arg(ap, int);
462 if ((M(obj)->type != MATCHER_ISNULL)
463 && (M(obj)->type != MATCHER_ISTRUE)
464 && (M(obj)->type != MATCHER_ISFALSE))
465 return -1;
467 UNARY_M(obj)->expr = va_arg(ap, sdb_store_expr_t *);
468 sdb_object_ref(SDB_OBJ(UNARY_M(obj)->expr));
469 return 0;
470 } /* unary_matcher_init */
472 static void
473 unary_matcher_destroy(sdb_object_t *obj)
474 {
475 sdb_object_deref(SDB_OBJ(UNARY_M(obj)->expr));
476 UNARY_M(obj)->expr = NULL;
477 } /* unary_matcher_destroy */
479 static sdb_type_t op_type = {
480 /* size = */ sizeof(op_matcher_t),
481 /* init = */ op_matcher_init,
482 /* destroy = */ op_matcher_destroy,
483 };
485 static sdb_type_t uop_type = {
486 /* size = */ sizeof(uop_matcher_t),
487 /* init = */ uop_matcher_init,
488 /* destroy = */ uop_matcher_destroy,
489 };
491 static sdb_type_t iter_type = {
492 /* size = */ sizeof(iter_matcher_t),
493 /* init = */ iter_matcher_init,
494 /* destroy = */ iter_matcher_destroy,
495 };
497 static sdb_type_t cmp_type = {
498 /* size = */ sizeof(cmp_matcher_t),
499 /* init = */ cmp_matcher_init,
500 /* destroy = */ cmp_matcher_destroy,
501 };
503 static sdb_type_t unary_type = {
504 /* size = */ sizeof(unary_matcher_t),
505 /* init = */ unary_matcher_init,
506 /* destroy = */ unary_matcher_destroy,
507 };
509 /*
510 * public API
511 */
513 sdb_store_matcher_t *
514 sdb_store_any_matcher(sdb_store_expr_t *iter, sdb_store_matcher_t *m)
515 {
516 if ((m->type < MATCHER_LT) || (MATCHER_NREGEX < m->type)) {
517 sdb_log(SDB_LOG_ERR, "store: Invalid ANY -> %s matcher "
518 "(invalid operator)", MATCHER_SYM(m->type));
519 return NULL;
520 }
521 if (CMP_M(m)->left) {
522 sdb_log(SDB_LOG_ERR, "store: Invalid ANY %s %s %s matcher "
523 "(invalid left operand)",
524 SDB_TYPE_TO_STRING(CMP_M(m)->left->data_type),
525 MATCHER_SYM(m->type),
526 SDB_TYPE_TO_STRING(CMP_M(m)->right->data_type));
527 return NULL;
528 }
529 return M(sdb_object_create("any-matcher", iter_type,
530 MATCHER_ANY, iter, m));
531 } /* sdb_store_any_matcher */
533 sdb_store_matcher_t *
534 sdb_store_all_matcher(sdb_store_expr_t *iter, sdb_store_matcher_t *m)
535 {
536 if ((m->type < MATCHER_LT) || (MATCHER_NREGEX < m->type)) {
537 sdb_log(SDB_LOG_ERR, "store: Invalid ALL -> %s matcher "
538 "(invalid operator)", MATCHER_SYM(m->type));
539 return NULL;
540 }
541 if (CMP_M(m)->left) {
542 sdb_log(SDB_LOG_ERR, "store: Invalid ALL %s %s %s matcher "
543 "(invalid left operand)",
544 SDB_TYPE_TO_STRING(CMP_M(m)->left->data_type),
545 MATCHER_SYM(m->type),
546 SDB_TYPE_TO_STRING(CMP_M(m)->right->data_type));
547 return NULL;
548 }
549 return M(sdb_object_create("all-matcher", iter_type,
550 MATCHER_ALL, iter, m));
551 } /* sdb_store_all_matcher */
553 sdb_store_matcher_t *
554 sdb_store_lt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
555 {
556 return M(sdb_object_create("lt-matcher", cmp_type,
557 MATCHER_LT, left, right));
558 } /* sdb_store_lt_matcher */
560 sdb_store_matcher_t *
561 sdb_store_le_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
562 {
563 return M(sdb_object_create("le-matcher", cmp_type,
564 MATCHER_LE, left, right));
565 } /* sdb_store_le_matcher */
567 sdb_store_matcher_t *
568 sdb_store_eq_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
569 {
570 return M(sdb_object_create("eq-matcher", cmp_type,
571 MATCHER_EQ, left, right));
572 } /* sdb_store_eq_matcher */
574 sdb_store_matcher_t *
575 sdb_store_ne_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
576 {
577 return M(sdb_object_create("ne-matcher", cmp_type,
578 MATCHER_NE, left, right));
579 } /* sdb_store_ne_matcher */
581 sdb_store_matcher_t *
582 sdb_store_ge_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
583 {
584 return M(sdb_object_create("ge-matcher", cmp_type,
585 MATCHER_GE, left, right));
586 } /* sdb_store_ge_matcher */
588 sdb_store_matcher_t *
589 sdb_store_gt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
590 {
591 return M(sdb_object_create("gt-matcher", cmp_type,
592 MATCHER_GT, left, right));
593 } /* sdb_store_gt_matcher */
595 sdb_store_matcher_t *
596 sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
597 {
598 return M(sdb_object_create("in-matcher", cmp_type,
599 MATCHER_IN, left, right));
600 } /* sdb_store_in_matcher */
602 sdb_store_matcher_t *
603 sdb_store_regex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
604 {
605 if (! right->type) {
606 if ((right->data.type != SDB_TYPE_STRING)
607 && (right->data.type != SDB_TYPE_REGEX))
608 return NULL;
610 if (right->data.type == SDB_TYPE_STRING) {
611 char *raw = right->data.data.string;
612 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &right->data))
613 return NULL;
614 free(raw);
615 }
616 }
617 return M(sdb_object_create("regex-matcher", cmp_type,
618 MATCHER_REGEX, left, right));
619 } /* sdb_store_regex_matcher */
621 sdb_store_matcher_t *
622 sdb_store_nregex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
623 {
624 sdb_store_matcher_t *m = sdb_store_regex_matcher(left, right);
625 if (! m)
626 return NULL;
627 m->type = MATCHER_NREGEX;
628 return m;
629 } /* sdb_store_nregex_matcher */
631 sdb_store_matcher_t *
632 sdb_store_isnull_matcher(sdb_store_expr_t *expr)
633 {
634 return M(sdb_object_create("isnull-matcher", unary_type,
635 MATCHER_ISNULL, expr));
636 } /* sdb_store_isnull_matcher */
638 sdb_store_matcher_t *
639 sdb_store_istrue_matcher(sdb_store_expr_t *expr)
640 {
641 return M(sdb_object_create("istrue-matcher", unary_type,
642 MATCHER_ISTRUE, expr));
643 } /* sdb_store_istrue_matcher */
645 sdb_store_matcher_t *
646 sdb_store_isfalse_matcher(sdb_store_expr_t *expr)
647 {
648 return M(sdb_object_create("isfalse-matcher", unary_type,
649 MATCHER_ISFALSE, expr));
650 } /* sdb_store_isfalse_matcher */
652 sdb_store_matcher_t *
653 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
654 {
655 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
656 left, right));
657 } /* sdb_store_dis_matcher */
659 sdb_store_matcher_t *
660 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
661 {
662 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
663 left, right));
664 } /* sdb_store_con_matcher */
666 sdb_store_matcher_t *
667 sdb_store_inv_matcher(sdb_store_matcher_t *m)
668 {
669 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
670 } /* sdb_store_inv_matcher */
672 int
673 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
674 sdb_store_matcher_t *filter)
675 {
676 if (filter && (! sdb_store_matcher_matches(filter, obj, NULL)))
677 return 0;
679 /* "NULL" always matches */
680 if ((! m) || (! obj))
681 return 1;
683 if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
684 return 0;
686 if (! matchers[m->type])
687 return 0;
688 return matchers[m->type](m, obj, filter);
689 } /* sdb_store_matcher_matches */
691 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */