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 /*
51 * private data types
52 */
54 typedef struct {
55 sdb_store_matcher_t *m;
56 sdb_store_lookup_cb cb;
57 void *user_data;
58 } lookup_iter_data_t;
60 /*
61 * private helper functions
62 */
64 static int
65 lookup_iter(sdb_store_base_t *obj, void *user_data)
66 {
67 lookup_iter_data_t *d = user_data;
69 if (sdb_store_matcher_matches(d->m, obj))
70 return d->cb(obj, d->user_data);
71 return 0;
72 } /* lookup_iter */
74 /*
75 * matcher implementations
76 */
78 static int
79 match_logical(sdb_store_matcher_t *m, sdb_store_base_t *obj);
80 static int
81 match_unary(sdb_store_matcher_t *m, sdb_store_base_t *obj);
82 static int
83 match_obj(sdb_store_matcher_t *m, sdb_store_base_t *obj);
85 /* specific matchers */
87 static int
88 match_obj_name(name_matcher_t *m, const char *name)
89 {
90 assert(m);
92 if ((! m->name) && (! m->name_re))
93 return 1;
95 if (! name)
96 name = "";
98 if (m->name && strcasecmp(m->name, name))
99 return 0;
100 if (m->name_re && regexec(m->name_re, name,
101 /* matches */ 0, NULL, /* flags = */ 0))
102 return 0;
103 return 1;
104 } /* match_obj_name */
106 static char *
107 obj_name_tostring(name_matcher_t *m, char *buf, size_t buflen)
108 {
109 snprintf(buf, buflen, "{ %s%s%s, %p }",
110 m->name ? "'" : "", m->name ? m->name : "NULL", m->name ? "'" : "",
111 m->name_re);
112 return buf;
113 } /* obj_name_tostring */
115 static char *
116 logical_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
117 {
118 char left[buflen + 1], right[buflen + 1];
120 if (! m) {
121 /* this should not happen */
122 snprintf(buf, buflen, "()");
123 return buf;
124 }
126 assert((m->type == MATCHER_OR) || (m->type == MATCHER_AND));
127 snprintf(buf, buflen, "(%s, %s, %s)",
128 m->type == MATCHER_OR ? "OR" : "AND",
129 sdb_store_matcher_tostring(OP_M(m)->left, left, sizeof(left)),
130 sdb_store_matcher_tostring(OP_M(m)->right, right, sizeof(right)));
131 return buf;
132 } /* logical_tostring */
134 static char *
135 unary_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
136 {
137 char op[buflen + 1];
139 if (! m) {
140 /* this should not happen */
141 snprintf(buf, buflen, "()");
142 return buf;
143 }
145 assert(m->type == MATCHER_NOT);
146 snprintf(buf, buflen, "(NOT, %s)",
147 sdb_store_matcher_tostring(UOP_M(m)->op, op, sizeof(op)));
148 return buf;
149 } /* unary_tostring */
151 static char *
152 name_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
153 {
154 char name[buflen + 1];
155 assert(m->type == MATCHER_NAME);
156 snprintf(buf, buflen, "OBJ[%s]{ NAME%s }",
157 SDB_STORE_TYPE_TO_NAME(OBJ_M(m)->obj_type),
158 obj_name_tostring(&OBJ_M(m)->name, name, sizeof(name)));
159 return buf;
160 } /* name_tostring */
162 static char *
163 attr_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
164 {
165 char name[buflen + 1], value[buflen + 1];
167 if (! m) {
168 snprintf(buf, buflen, "ATTR{}");
169 return buf;
170 }
172 assert(m->type == MATCHER_ATTR);
173 snprintf(buf, buflen, "ATTR{ NAME%s, VALUE%s }",
174 obj_name_tostring(&OBJ_M(m)->name, name, sizeof(name)),
175 obj_name_tostring(&ATTR_M(m)->value, value, sizeof(value)));
176 return buf;
177 } /* attr_tostring */
179 static char *
180 service_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
181 {
182 char name[buflen + 1], attr[buflen + 1];
184 if (! m) {
185 snprintf(buf, buflen, "SERVICE{}");
186 return buf;
187 }
189 assert(m->type == MATCHER_SERVICE);
190 snprintf(buf, buflen, "SERVICE{ NAME%s, %s }",
191 obj_name_tostring(&OBJ_M(m)->name, name, sizeof(name)),
192 attr_tostring(SDB_STORE_MATCHER(SERVICE_M(m)->attr),
193 attr, sizeof(attr)));
194 return buf;
195 } /* service_tostring */
197 static char *
198 host_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
199 {
200 char name[buflen + 1], service[buflen + 1], attr[buflen + 1];
202 if (! m) {
203 snprintf(buf, buflen, "HOST{}");
204 return buf;
205 }
207 assert(m->type == MATCHER_HOST);
208 snprintf(buf, buflen, "HOST{ NAME%s, %s, %s }",
209 obj_name_tostring(&OBJ_M(m)->name, name, sizeof(name)),
210 service_tostring(SDB_STORE_MATCHER(HOST_M(m)->service),
211 service, sizeof(service)),
212 attr_tostring(SDB_STORE_MATCHER(HOST_M(m)->attr),
213 attr, sizeof(attr)));
214 return buf;
215 } /* host_tostring */
217 static int
218 match_name(sdb_store_matcher_t *m, sdb_store_base_t *obj)
219 {
220 sdb_llist_iter_t *iter = NULL;
221 int status = 0;
223 assert(m && obj);
225 if (obj->type != SDB_HOST)
226 return 0;
228 switch (OBJ_M(m)->obj_type) {
229 case SDB_HOST:
230 return match_obj_name(&OBJ_M(m)->name, obj->super.name);
231 break;
232 case SDB_SERVICE:
233 iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->children);
234 break;
235 case SDB_ATTRIBUTE:
236 iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->attributes);
237 break;
238 }
240 while (sdb_llist_iter_has_next(iter)) {
241 sdb_store_base_t *child = STORE_BASE(sdb_llist_iter_get_next(iter));
242 if (match_obj_name(&OBJ_M(m)->name, child->super.name)) {
243 status = 1;
244 break;
245 }
246 }
247 sdb_llist_iter_destroy(iter);
248 return status;
249 } /* match_name */
251 /* match attribute specific values;
252 * always call this function through match_obj() */
253 static int
254 match_attr(attr_matcher_t *m, sdb_store_base_t *obj)
255 {
256 assert(m && obj);
258 if (obj->type != SDB_ATTRIBUTE)
259 return 0;
261 {
262 sdb_attribute_t *attr = SDB_ATTR(obj);
263 char buf[sdb_data_strlen(&attr->value) + 1];
265 if (sdb_data_format(&attr->value, buf, sizeof(buf), SDB_UNQUOTED) <= 0)
266 return 0;
267 return match_obj_name(&m->value, buf);
268 }
269 } /* match_attr */
271 /* match service specific values;
272 * always call this function through match_obj() */
273 static int
274 match_service(service_matcher_t *m, sdb_store_base_t *obj)
275 {
276 sdb_llist_iter_t *iter;
278 assert(m && obj);
280 if (obj->type != SDB_SERVICE)
281 return 0;
283 if (! m->attr)
284 return 1;
286 iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->attributes);
287 while (sdb_llist_iter_has_next(iter)) {
288 sdb_store_base_t *attr = STORE_BASE(sdb_llist_iter_get_next(iter));
290 /* if any of the attributes matches we found a matching service */
291 if (match_obj(M(m->attr), attr)) {
292 sdb_llist_iter_destroy(iter);
293 return 1;
294 }
295 }
296 sdb_llist_iter_destroy(iter);
297 return 0;
298 } /* match_service */
300 /* match host specific values;
301 * always call this function through match_obj() */
302 static int
303 match_host(host_matcher_t *m, sdb_store_base_t *obj)
304 {
305 sdb_llist_iter_t *iter;
306 int status;
308 assert(m && obj);
310 if (obj->type != SDB_HOST)
311 return 0;
313 if (m->service) {
314 iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->children);
315 status = 0;
316 }
317 else {
318 iter = NULL;
319 status = 1;
320 }
321 while (sdb_llist_iter_has_next(iter)) {
322 sdb_store_base_t *service = STORE_BASE(sdb_llist_iter_get_next(iter));
324 /* found a matching service */
325 if (match_obj(M(m->service), service)) {
326 status = 1;
327 break;
328 }
329 }
330 sdb_llist_iter_destroy(iter);
332 if (! status)
333 return status;
334 else if (! m->attr)
335 return 1;
337 iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->attributes);
338 while (sdb_llist_iter_has_next(iter)) {
339 sdb_store_base_t *attr = STORE_BASE(sdb_llist_iter_get_next(iter));
341 /* if any attribute matches, we found a matching host */
342 if (match_obj(M(m->attr), attr)) {
343 sdb_llist_iter_destroy(iter);
344 return 1;
345 }
346 }
347 sdb_llist_iter_destroy(iter);
348 return 0;
349 } /* match_host */
351 /* generic matchers */
353 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_base_t *);
355 /* this array needs to be indexable by the matcher types;
356 * -> update the enum in store-private.h when updating this */
357 static matcher_cb matchers[] = {
358 match_logical,
359 match_logical,
360 match_unary,
361 match_name,
362 match_obj,
363 match_obj,
364 match_obj,
365 };
367 typedef char *(*matcher_tostring_cb)(sdb_store_matcher_t *, char *, size_t);
369 static matcher_tostring_cb matchers_tostring[] = {
370 logical_tostring,
371 logical_tostring,
372 unary_tostring,
373 name_tostring,
374 attr_tostring,
375 service_tostring,
376 host_tostring,
377 };
379 static int
380 match_logical(sdb_store_matcher_t *m, sdb_store_base_t *obj)
381 {
382 int status;
384 assert(m && obj);
385 assert(OP_M(m)->left && OP_M(m)->right);
387 status = sdb_store_matcher_matches(OP_M(m)->left, obj);
388 /* lazy evaluation */
389 if ((! status) && (m->type == MATCHER_AND))
390 return status;
391 else if (status && (m->type == MATCHER_OR))
392 return status;
394 return sdb_store_matcher_matches(OP_M(m)->right, obj);
395 } /* match_logical */
397 static int
398 match_unary(sdb_store_matcher_t *m, sdb_store_base_t *obj)
399 {
400 assert(m && obj);
401 assert(UOP_M(m)->op);
403 return !sdb_store_matcher_matches(UOP_M(m)->op, obj);
404 } /* match_unary */
406 static int
407 match_obj(sdb_store_matcher_t *m, sdb_store_base_t *obj)
408 {
409 int status;
411 assert(m && obj);
413 status = match_obj_name(&OBJ_M(m)->name, obj->super.name);
414 if (! status)
415 return status;
417 switch (m->type) {
418 case MATCHER_ATTR:
419 return match_attr(ATTR_M(m), obj);
420 break;
421 case MATCHER_SERVICE:
422 return match_service(SERVICE_M(m), obj);
423 break;
424 case MATCHER_HOST:
425 return match_host(HOST_M(m), obj);
426 break;
427 default:
428 assert(m->type != m->type);
429 break;
430 }
431 return 0;
432 } /* match_obj */
434 /*
435 * private matcher types
436 */
438 /* initializes a name matcher consuming two elements from ap */
439 static int
440 name_matcher_init(name_matcher_t *m, va_list ap)
441 {
442 const char *name = va_arg(ap, const char *);
443 const char *name_re = va_arg(ap, const char *);
445 if (name) {
446 m->name = strdup(name);
447 if (! m->name)
448 return -1;
449 }
450 if (name_re) {
451 m->name_re = malloc(sizeof(*m->name_re));
452 if (! m->name_re)
453 return -1;
454 if (regcomp(m->name_re, name_re, REG_EXTENDED | REG_ICASE | REG_NOSUB))
455 return -1;
456 }
457 return 0;
458 } /* name_matcher_init */
460 static void
461 name_matcher_destroy(name_matcher_t *m)
462 {
463 if (m->name)
464 free(m->name);
465 if (m->name_re) {
466 regfree(m->name_re);
467 free(m->name_re);
468 }
469 } /* name_matcher_destroy */
471 /* initializes an object matcher consuming two elements from ap */
472 static int
473 obj_matcher_init(sdb_object_t *obj, va_list ap)
474 {
475 obj_matcher_t *m = OBJ_M(obj);
476 M(obj)->type = MATCHER_NAME;
477 return name_matcher_init(&m->name, ap);
478 } /* obj_matcher_init */
480 static void
481 obj_matcher_destroy(sdb_object_t *obj)
482 {
483 obj_matcher_t *m = OBJ_M(obj);
484 name_matcher_destroy(&m->name);
485 } /* obj_matcher_destroy */
487 static int
488 attr_matcher_init(sdb_object_t *obj, va_list ap)
489 {
490 attr_matcher_t *attr = ATTR_M(obj);
491 int status;
493 status = obj_matcher_init(obj, ap);
494 if (! status)
495 status = name_matcher_init(&attr->value, ap);
497 M(obj)->type = MATCHER_ATTR;
498 return status;
499 } /* attr_matcher_init */
501 static void
502 attr_matcher_destroy(sdb_object_t *obj)
503 {
504 attr_matcher_t *attr = ATTR_M(obj);
506 obj_matcher_destroy(obj);
507 name_matcher_destroy(&attr->value);
508 } /* attr_matcher_destroy */
510 static int
511 service_matcher_init(sdb_object_t *obj, va_list ap)
512 {
513 attr_matcher_t *attr;
514 int status;
516 status = obj_matcher_init(obj, ap);
517 if (status)
518 return status;
520 attr = va_arg(ap, attr_matcher_t *);
522 sdb_object_ref(SDB_OBJ(attr));
523 SERVICE_M(obj)->attr = attr;
525 M(obj)->type = MATCHER_SERVICE;
526 return 0;
527 } /* service_matcher_init */
529 static void
530 service_matcher_destroy(sdb_object_t *obj)
531 {
532 obj_matcher_destroy(obj);
533 sdb_object_deref(SDB_OBJ(SERVICE_M(obj)->attr));
534 } /* service_matcher_destroy */
536 static int
537 host_matcher_init(sdb_object_t *obj, va_list ap)
538 {
539 service_matcher_t *service;
540 attr_matcher_t *attr;
541 int status;
543 status = obj_matcher_init(obj, ap);
544 if (status)
545 return status;
547 service = va_arg(ap, service_matcher_t *);
548 attr = va_arg(ap, attr_matcher_t *);
550 sdb_object_ref(SDB_OBJ(service));
551 HOST_M(obj)->service = service;
552 sdb_object_ref(SDB_OBJ(attr));
553 HOST_M(obj)->attr = attr;
555 M(obj)->type = MATCHER_HOST;
556 return 0;
557 } /* host_matcher_init */
559 static void
560 host_matcher_destroy(sdb_object_t *obj)
561 {
562 obj_matcher_destroy(obj);
563 sdb_object_deref(SDB_OBJ(HOST_M(obj)->service));
564 sdb_object_deref(SDB_OBJ(HOST_M(obj)->attr));
565 } /* host_matcher_destroy */
567 static int
568 op_matcher_init(sdb_object_t *obj, va_list ap)
569 {
570 M(obj)->type = va_arg(ap, int);
571 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
572 return -1;
574 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
575 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
576 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
577 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
579 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
580 return -1;
581 return 0;
582 } /* op_matcher_init */
584 static void
585 op_matcher_destroy(sdb_object_t *obj)
586 {
587 if (OP_M(obj)->left)
588 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
589 if (OP_M(obj)->right)
590 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
591 } /* op_matcher_destroy */
593 static int
594 uop_matcher_init(sdb_object_t *obj, va_list ap)
595 {
596 M(obj)->type = va_arg(ap, int);
597 if (M(obj)->type != MATCHER_NOT)
598 return -1;
600 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
601 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
603 if (! UOP_M(obj)->op)
604 return -1;
605 return 0;
606 } /* uop_matcher_init */
608 static void
609 uop_matcher_destroy(sdb_object_t *obj)
610 {
611 if (UOP_M(obj)->op)
612 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
613 } /* uop_matcher_destroy */
615 static sdb_type_t name_type = {
616 /* size = */ sizeof(obj_matcher_t),
617 /* init = */ obj_matcher_init,
618 /* destroy = */ obj_matcher_destroy,
619 };
621 static sdb_type_t attr_type = {
622 /* size = */ sizeof(attr_matcher_t),
623 /* init = */ attr_matcher_init,
624 /* destroy = */ attr_matcher_destroy,
625 };
627 static sdb_type_t service_type = {
628 /* size = */ sizeof(service_matcher_t),
629 /* init = */ service_matcher_init,
630 /* destroy = */ service_matcher_destroy,
631 };
633 static sdb_type_t host_type = {
634 /* size = */ sizeof(host_matcher_t),
635 /* init = */ host_matcher_init,
636 /* destroy = */ host_matcher_destroy,
637 };
639 static sdb_type_t op_type = {
640 /* size = */ sizeof(op_matcher_t),
641 /* init = */ op_matcher_init,
642 /* destroy = */ op_matcher_destroy,
643 };
645 static sdb_type_t uop_type = {
646 /* size = */ sizeof(uop_matcher_t),
647 /* init = */ uop_matcher_init,
648 /* destroy = */ uop_matcher_destroy,
649 };
651 /*
652 * public API
653 */
655 sdb_store_matcher_t *
656 sdb_store_name_matcher(int type, const char *name, _Bool re)
657 {
658 sdb_store_matcher_t *m;
660 if (re)
661 m = M(sdb_object_create("name-matcher", name_type,
662 NULL, name));
663 else
664 m = M(sdb_object_create("name-matcher", name_type,
665 name, NULL));
667 if (! m)
668 return NULL;
670 OBJ_M(m)->obj_type = type;
671 return m;
672 } /* sdb_store_name_matcher */
674 sdb_store_matcher_t *
675 sdb_store_attr_matcher(const char *attr_name, const char *attr_name_re,
676 const char *attr_value, const char *attr_value_re)
677 {
678 return M(sdb_object_create("attr-matcher", attr_type,
679 attr_name, attr_name_re, attr_value, attr_value_re));
680 } /* sdb_store_attr_matcher */
682 sdb_store_matcher_t *
683 sdb_store_service_matcher(const char *service_name, const char *service_name_re,
684 sdb_store_matcher_t *attr_matcher)
685 {
686 return M(sdb_object_create("service-matcher", service_type,
687 service_name, service_name_re, attr_matcher));
688 } /* sdb_store_service_matcher */
690 sdb_store_matcher_t *
691 sdb_store_host_matcher(const char *host_name, const char *host_name_re,
692 sdb_store_matcher_t *service_matcher,
693 sdb_store_matcher_t *attr_matcher)
694 {
695 return M(sdb_object_create("host-matcher", host_type,
696 host_name, host_name_re, service_matcher, attr_matcher));
697 } /* sdb_store_host_matcher */
699 sdb_store_matcher_t *
700 sdb_store_matcher_parse_cmp(const char *obj_type, const char *attr,
701 const char *op, const char *value)
702 {
703 int typ = -1;
704 int inv = 0;
706 sdb_store_matcher_t *m = NULL;
708 const char *matcher = NULL;
709 const char *matcher_re = NULL;
711 if (! strcasecmp(obj_type, "host"))
712 typ = SDB_HOST;
713 else if (! strcasecmp(obj_type, "service"))
714 typ = SDB_SERVICE;
715 else if (! strcasecmp(obj_type, "attribute"))
716 typ = SDB_ATTRIBUTE;
718 /* TODO: support other operators */
719 if (! strcasecmp(op, "=")) {
720 matcher = value;
721 }
722 else if (! strcasecmp(op, "!=")) {
723 matcher = value;
724 inv = 1;
725 }
726 else if (! strcasecmp(op, "=~")) {
727 matcher_re = value;
728 }
729 else if (! strcasecmp(op, "!~")) {
730 matcher_re = value;
731 inv = 1;
732 }
733 else
734 return NULL;
736 if (! strcasecmp(attr, "name")) {
737 /* accept */
738 }
739 else if (typ == SDB_ATTRIBUTE)
740 m = sdb_store_host_matcher(/* name = */ NULL, NULL,
741 /* service = */ NULL,
742 sdb_store_attr_matcher(attr, NULL, matcher, matcher_re));
743 else
744 return NULL;
746 if (m) {
747 /* accept the attribute value matcher */
748 }
749 else if (typ == SDB_HOST)
750 m = sdb_store_host_matcher(matcher, matcher_re, NULL, NULL);
751 else if (typ == SDB_SERVICE)
752 m = sdb_store_host_matcher(/* name = */ NULL, NULL,
753 sdb_store_service_matcher(matcher, matcher_re, NULL),
754 /* attr = */ NULL);
755 else if (typ == SDB_ATTRIBUTE)
756 m = sdb_store_host_matcher(/* name = */ NULL, NULL,
757 /* service = */ NULL,
758 sdb_store_attr_matcher(matcher, matcher_re, NULL, NULL));
760 if (! m)
761 return NULL;
763 /* pass ownership to the host matcher */
764 sdb_object_deref(SDB_OBJ(HOST_M(m)->service));
765 sdb_object_deref(SDB_OBJ(HOST_M(m)->attr));
767 if (inv) {
768 sdb_store_matcher_t *tmp;
769 tmp = sdb_store_inv_matcher(m);
770 /* pass ownership to the inverse matcher */
771 sdb_object_deref(SDB_OBJ(m));
772 m = tmp;
773 }
774 return m;
775 } /* sdb_store_matcher_parse_cmp */
777 sdb_store_matcher_t *
778 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
779 {
780 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
781 left, right));
782 } /* sdb_store_dis_matcher */
784 sdb_store_matcher_t *
785 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
786 {
787 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
788 left, right));
789 } /* sdb_store_con_matcher */
791 sdb_store_matcher_t *
792 sdb_store_inv_matcher(sdb_store_matcher_t *m)
793 {
794 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
795 } /* sdb_store_inv_matcher */
797 int
798 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_base_t *obj)
799 {
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);
808 } /* sdb_store_matcher_matches */
810 char *
811 sdb_store_matcher_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
812 {
813 if (! m)
814 return NULL;
816 if ((m->type < 0)
817 || (((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers_tostring))))
818 return NULL;
819 return matchers_tostring[m->type](m, buf, buflen);
820 } /* sdb_store_matcher_tostring */
822 int
823 sdb_store_lookup(sdb_store_matcher_t *m, sdb_store_lookup_cb cb,
824 void *user_data)
825 {
826 lookup_iter_data_t data = { m, cb, user_data };
828 if (! cb)
829 return -1;
830 return sdb_store_iterate(lookup_iter, &data);
831 } /* sdb_store_lookup */
833 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */