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 * private data types
54 */
56 typedef struct {
57 sdb_store_matcher_t *m;
58 sdb_store_matcher_t *filter;
59 sdb_store_lookup_cb cb;
60 void *user_data;
61 } scan_iter_data_t;
63 /*
64 * private helper functions
65 */
67 static int
68 scan_iter(sdb_store_obj_t *obj, void *user_data)
69 {
70 scan_iter_data_t *d = user_data;
72 if (sdb_store_matcher_matches(d->m, obj, d->filter))
73 return d->cb(obj, d->user_data);
74 return 0;
75 } /* scan_iter */
77 static sdb_attribute_t *
78 attr_get(sdb_host_t *host, const char *name, sdb_store_matcher_t *filter)
79 {
80 sdb_avltree_iter_t *iter = NULL;
81 sdb_attribute_t *attr = NULL;
83 iter = sdb_avltree_get_iter(host->attributes);
84 while (sdb_avltree_iter_has_next(iter)) {
85 sdb_attribute_t *a = ATTR(sdb_avltree_iter_get_next(iter));
87 if (strcasecmp(name, SDB_OBJ(a)->name))
88 continue;
90 assert(STORE_OBJ(a)->type == SDB_ATTRIBUTE);
91 attr = a;
92 break;
93 }
94 sdb_avltree_iter_destroy(iter);
96 if (filter && (! sdb_store_matcher_matches(filter, STORE_OBJ(attr),
97 NULL)))
98 return NULL;
99 return attr;
100 } /* attr_get */
102 /*
103 * conditional implementations
104 */
106 static int
107 attr_cmp(sdb_store_obj_t *obj, sdb_store_cond_t *cond,
108 sdb_store_matcher_t *filter)
109 {
110 sdb_attribute_t *attr;
111 sdb_data_t value = SDB_DATA_INIT;
112 int status;
114 if (obj->type != SDB_HOST)
115 return INT_MAX;
117 if (sdb_store_expr_eval(ATTR_C(cond)->expr, obj, &value, filter))
118 return INT_MAX;
120 attr = attr_get(HOST(obj), ATTR_C(cond)->name, filter);
121 if (! attr)
122 status = INT_MAX;
123 else if (attr->value.type != value.type)
124 status = sdb_data_strcmp(&attr->value, &value);
125 else
126 status = sdb_data_cmp(&attr->value, &value);
127 sdb_data_free_datum(&value);
128 return status;
129 } /* attr_cmp */
131 static int
132 obj_cmp(sdb_store_obj_t *obj, sdb_store_cond_t *cond,
133 sdb_store_matcher_t *filter)
134 {
135 sdb_data_t obj_value = SDB_DATA_INIT;
136 sdb_data_t value = SDB_DATA_INIT;
137 int status;
139 if (sdb_store_expr_eval(OBJ_C(cond)->expr, obj, &value, filter))
140 return INT_MAX;
142 if (OBJ_C(cond)->field == SDB_FIELD_BACKEND) {
143 /* this implementation is not actually a conditional but rather checks
144 * for equality (or rather, existence) only */
145 size_t i;
147 if (value.type != SDB_TYPE_STRING)
148 return INT_MAX;
150 status = INT_MAX;
151 for (i = 0; i < obj->backends_num; ++i) {
152 if (! strcasecmp(obj->backends[i], value.data.string)) {
153 status = 0;
154 break;
155 }
156 }
157 sdb_data_free_datum(&value);
158 return status;
159 }
161 if (sdb_store_get_field(obj, OBJ_C(cond)->field, &obj_value))
162 return INT_MAX;
163 if (obj_value.type != value.type) {
164 sdb_data_free_datum(&obj_value);
165 sdb_data_free_datum(&value);
166 return INT_MAX;
167 }
169 status = sdb_data_cmp(&obj_value, &value);
170 sdb_data_free_datum(&obj_value);
171 sdb_data_free_datum(&value);
172 return status;
173 } /* obj_cmp */
175 /*
176 * matcher implementations
177 */
179 static int
180 match_string(string_matcher_t *m, const char *name)
181 {
182 if ((! m->name) && (! m->name_re))
183 return 1;
185 if (! name)
186 name = "";
188 if (m->name && strcasecmp(m->name, name))
189 return 0;
190 if (m->name_re && regexec(m->name_re, name,
191 /* matches */ 0, NULL, /* flags = */ 0))
192 return 0;
193 return 1;
194 } /* match_string */
196 static int
197 match_logical(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
198 sdb_store_matcher_t *filter)
199 {
200 int status;
202 assert((m->type == MATCHER_AND) || (m->type == MATCHER_OR));
203 assert(OP_M(m)->left && OP_M(m)->right);
205 status = sdb_store_matcher_matches(OP_M(m)->left, obj, filter);
207 /* lazy evaluation */
208 if ((! status) && (m->type == MATCHER_AND))
209 return status;
210 else if (status && (m->type == MATCHER_OR))
211 return status;
213 return sdb_store_matcher_matches(OP_M(m)->right, obj, filter);
214 } /* match_logical */
216 static int
217 match_unary(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
218 sdb_store_matcher_t *filter)
219 {
220 assert(m->type == MATCHER_NOT);
221 assert(UOP_M(m)->op);
223 return !sdb_store_matcher_matches(UOP_M(m)->op, obj, filter);
224 } /* match_unary */
226 static int
227 match_name(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
228 sdb_store_matcher_t *filter)
229 {
230 sdb_avltree_iter_t *iter = NULL;
231 int status = 0;
233 assert(m->type == MATCHER_NAME);
235 if (obj->type == NAME_M(m)->obj_type)
236 return match_string(&NAME_M(m)->name, SDB_OBJ(obj)->name);
237 else if (obj->type != SDB_HOST)
238 return 0;
240 switch (NAME_M(m)->obj_type) {
241 case SDB_SERVICE:
242 iter = sdb_avltree_get_iter(HOST(obj)->services);
243 break;
244 case SDB_METRIC:
245 iter = sdb_avltree_get_iter(HOST(obj)->metrics);
246 break;
247 case SDB_ATTRIBUTE:
248 iter = sdb_avltree_get_iter(HOST(obj)->attributes);
249 break;
250 }
252 while (sdb_avltree_iter_has_next(iter)) {
253 sdb_object_t *child = sdb_avltree_iter_get_next(iter);
254 if (filter && (! sdb_store_matcher_matches(filter, STORE_OBJ(child),
255 NULL)))
256 continue;
257 if (match_string(&NAME_M(m)->name, child->name)) {
258 status = 1;
259 break;
260 }
261 }
262 sdb_avltree_iter_destroy(iter);
263 return status;
264 } /* match_name */
266 static int
267 match_attr(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
268 sdb_store_matcher_t *filter)
269 {
270 sdb_attribute_t *attr;
272 assert(m->type == MATCHER_ATTR);
273 assert(ATTR_M(m)->name);
275 if (obj->type != SDB_HOST)
276 return 0;
278 attr = attr_get(HOST(obj), ATTR_M(m)->name, filter);
279 if (attr) {
280 char buf[sdb_data_strlen(&attr->value) + 1];
281 if (sdb_data_format(&attr->value, buf, sizeof(buf), SDB_UNQUOTED) <= 0)
282 return 0;
283 if (match_string(&ATTR_M(m)->value, buf))
284 return 1;
285 }
286 return 0;
287 } /* match_attr */
289 static int
290 match_child(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
291 sdb_store_matcher_t *filter)
292 {
293 sdb_avltree_iter_t *iter = NULL;
294 int status = 0;
296 assert((m->type == MATCHER_SERVICE)
297 || (m->type == MATCHER_METRIC)
298 || (m->type == MATCHER_ATTRIBUTE));
300 /* TODO: support all object types */
301 if (obj->type != SDB_HOST)
302 return 0;
304 if (m->type == MATCHER_SERVICE)
305 iter = sdb_avltree_get_iter(HOST(obj)->services);
306 else if (m->type == MATCHER_METRIC)
307 iter = sdb_avltree_get_iter(HOST(obj)->metrics);
308 else if (m->type == SDB_ATTRIBUTE)
309 iter = sdb_avltree_get_iter(HOST(obj)->attributes);
311 while (sdb_avltree_iter_has_next(iter)) {
312 sdb_object_t *child = sdb_avltree_iter_get_next(iter);
313 if (filter && (! sdb_store_matcher_matches(filter,
314 STORE_OBJ(child), NULL)))
315 continue;
317 if (sdb_store_matcher_matches(CHILD_M(m)->m, obj, filter)) {
318 status = 1;
319 break;
320 }
321 }
322 sdb_avltree_iter_destroy(iter);
323 return status;
324 } /* match_child */
326 static int
327 match_lt(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
328 sdb_store_matcher_t *filter)
329 {
330 int status;
331 assert(m->type == MATCHER_LT);
332 status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond, filter);
333 return (status != INT_MAX) && (status < 0);
334 } /* match_lt */
336 static int
337 match_le(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
338 sdb_store_matcher_t *filter)
339 {
340 int status;
341 assert(m->type == MATCHER_LE);
342 status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond, filter);
343 return (status != INT_MAX) && (status <= 0);
344 } /* match_le */
346 static int
347 match_eq(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
348 sdb_store_matcher_t *filter)
349 {
350 int status;
351 assert(m->type == MATCHER_EQ);
352 status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond, filter);
353 return (status != INT_MAX) && (! status);
354 } /* match_eq */
356 static int
357 match_ge(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
358 sdb_store_matcher_t *filter)
359 {
360 int status;
361 assert(m->type == MATCHER_GE);
362 status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond, filter);
363 return (status != INT_MAX) && (status >= 0);
364 } /* match_ge */
366 static int
367 match_gt(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
368 sdb_store_matcher_t *filter)
369 {
370 int status;
371 assert(m->type == MATCHER_GT);
372 status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond, filter);
373 return (status != INT_MAX) && (status > 0);
374 } /* match_gt */
376 /*
377 * cmp_expr:
378 * Compare the values of two expressions when evaluating them using the
379 * specified stored object and filter. Returns a value less than, equal to, or
380 * greater than zero if the value of the first expression compares less than,
381 * equal to, or greater than the value of the second expression. Returns
382 * INT_MAX if any of the expressions could not be evaluated.
383 */
384 static int
385 cmp_expr(sdb_store_expr_t *e1, sdb_store_expr_t *e2,
386 sdb_store_obj_t *obj, sdb_store_matcher_t *filter)
387 {
388 sdb_data_t v1 = SDB_DATA_INIT, v2 = SDB_DATA_INIT;
389 int status;
391 if (sdb_store_expr_eval(e1, obj, &v1, filter))
392 return INT_MAX;
393 if (sdb_store_expr_eval(e2, obj, &v2, filter)) {
394 sdb_data_free_datum(&v1);
395 return INT_MAX;
396 }
398 if (v1.type == v2.type)
399 status = sdb_data_cmp(&v1, &v2);
400 else
401 status = sdb_data_strcmp(&v1, &v2);
403 sdb_data_free_datum(&v1);
404 sdb_data_free_datum(&v2);
405 return status;
406 } /* cmp_expr */
408 static int
409 match_cmp_lt(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
410 sdb_store_matcher_t *filter)
411 {
412 int status;
413 assert(m->type == MATCHER_CMP_LT);
414 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
415 return (status != INT_MAX) && (status < 0);
416 } /* match_cmp_lt */
418 static int
419 match_cmp_le(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
420 sdb_store_matcher_t *filter)
421 {
422 int status;
423 assert(m->type == MATCHER_CMP_LE);
424 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
425 return (status != INT_MAX) && (status <= 0);
426 } /* match_cmp_le */
428 static int
429 match_cmp_eq(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
430 sdb_store_matcher_t *filter)
431 {
432 int status;
433 assert(m->type == MATCHER_CMP_EQ);
434 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
435 return (status != INT_MAX) && (! status);
436 } /* match_cmp_eq */
438 static int
439 match_cmp_ne(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
440 sdb_store_matcher_t *filter)
441 {
442 int status;
443 assert(m->type == MATCHER_CMP_NE);
444 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
445 return (status != INT_MAX) && status;
446 } /* match_cmp_ne */
448 static int
449 match_cmp_ge(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
450 sdb_store_matcher_t *filter)
451 {
452 int status;
453 assert(m->type == MATCHER_CMP_GE);
454 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
455 return (status != INT_MAX) && (status >= 0);
456 } /* match_cmp_ge */
458 static int
459 match_cmp_gt(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
460 sdb_store_matcher_t *filter)
461 {
462 int status;
463 assert(m->type == MATCHER_CMP_GT);
464 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
465 return (status != INT_MAX) && (status > 0);
466 } /* match_cmp_gt */
468 static int
469 match_regex(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
470 sdb_store_matcher_t *filter)
471 {
472 sdb_data_t v = SDB_DATA_INIT;
473 int status = 0;
475 regex_t regex;
476 _Bool free_regex = 0;
478 assert((m->type == MATCHER_REGEX)
479 || (m->type == MATCHER_NREGEX));
481 if (! CMP_M(m)->right->type) {
482 assert(CMP_M(m)->right->data.type == SDB_TYPE_REGEX);
483 regex = CMP_M(m)->right->data.data.re.regex;
484 }
485 else {
486 sdb_data_t tmp = SDB_DATA_INIT;
487 char *raw;
489 if (sdb_store_expr_eval(CMP_M(m)->right, obj, &tmp, filter))
490 return 0;
492 if (tmp.type != SDB_TYPE_STRING) {
493 sdb_data_free_datum(&tmp);
494 return 0;
495 }
497 raw = tmp.data.string;
498 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &tmp)) {
499 free(raw);
500 return 0;
501 }
503 regex = tmp.data.re.regex;
504 free_regex = 1;
505 free(tmp.data.re.raw);
506 free(raw);
507 }
509 if (sdb_store_expr_eval(CMP_M(m)->left, obj, &v, filter))
510 status = 0;
511 else {
512 char value[sdb_data_strlen(&v) + 1];
513 if (sdb_data_format(&v, value, sizeof(value), SDB_UNQUOTED) < 0)
514 status = 0;
515 else if (! regexec(®ex, value, 0, NULL, 0))
516 status = 1;
517 }
519 if (free_regex)
520 regfree(®ex);
521 sdb_data_free_datum(&v);
522 if (m->type == MATCHER_NREGEX)
523 return !status;
524 return status;
525 } /* match_regex */
527 static int
528 match_isnull(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
529 sdb_store_matcher_t *filter)
530 {
531 assert(m->type == MATCHER_ISNULL);
532 if (obj->type != SDB_HOST)
533 return 0;
534 return attr_get(HOST(obj), ISNULL_M(m)->attr_name, filter) == NULL;
535 } /* match_isnull */
537 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_obj_t *,
538 sdb_store_matcher_t *);
540 /* this array needs to be indexable by the matcher types;
541 * -> update the enum in store-private.h when updating this */
542 static matcher_cb
543 matchers[] = {
544 match_logical,
545 match_logical,
546 match_unary,
547 match_name,
548 match_attr,
549 match_child,
550 match_child,
551 match_child,
552 match_lt,
553 match_le,
554 match_eq,
555 match_ge,
556 match_gt,
557 match_cmp_lt,
558 match_cmp_le,
559 match_cmp_eq,
560 match_cmp_ne,
561 match_cmp_ge,
562 match_cmp_gt,
563 match_regex,
564 match_regex,
565 match_isnull,
566 };
568 /*
569 * private conditional types
570 */
572 static int
573 attr_cond_init(sdb_object_t *obj, va_list ap)
574 {
575 const char *name = va_arg(ap, const char *);
576 sdb_store_expr_t *expr = va_arg(ap, sdb_store_expr_t *);
578 if (! name)
579 return -1;
581 SDB_STORE_COND(obj)->cmp = attr_cmp;
583 ATTR_C(obj)->name = strdup(name);
584 if (! ATTR_C(obj)->name)
585 return -1;
586 ATTR_C(obj)->expr = expr;
587 sdb_object_ref(SDB_OBJ(expr));
588 return 0;
589 } /* attr_cond_init */
591 static void
592 attr_cond_destroy(sdb_object_t *obj)
593 {
594 if (ATTR_C(obj)->name)
595 free(ATTR_C(obj)->name);
596 sdb_object_deref(SDB_OBJ(ATTR_C(obj)->expr));
597 } /* attr_cond_destroy */
599 static sdb_type_t attr_cond_type = {
600 /* size = */ sizeof(attr_cond_t),
601 /* init = */ attr_cond_init,
602 /* destroy = */ attr_cond_destroy,
603 };
605 static int
606 obj_cond_init(sdb_object_t *obj, va_list ap)
607 {
608 int field = va_arg(ap, int);
609 sdb_store_expr_t *expr = va_arg(ap, sdb_store_expr_t *);
611 SDB_STORE_COND(obj)->cmp = obj_cmp;
613 OBJ_C(obj)->field = field;
614 OBJ_C(obj)->expr = expr;
615 sdb_object_ref(SDB_OBJ(expr));
616 return 0;
617 } /* obj_cond_init */
619 static void
620 obj_cond_destroy(sdb_object_t *obj)
621 {
622 sdb_object_deref(SDB_OBJ(OBJ_C(obj)->expr));
623 } /* obj_cond_destroy */
625 static sdb_type_t obj_cond_type = {
626 /* size = */ sizeof(obj_cond_t),
627 /* init = */ obj_cond_init,
628 /* destroy = */ obj_cond_destroy,
629 };
631 /*
632 * private matcher types
633 */
635 /* initializes a string matcher consuming two elements from ap */
636 static int
637 string_matcher_init(string_matcher_t *m, va_list ap)
638 {
639 const char *name = va_arg(ap, const char *);
640 const char *name_re = va_arg(ap, const char *);
642 if (name) {
643 m->name = strdup(name);
644 if (! m->name)
645 return -1;
646 }
647 if (name_re) {
648 m->name_re = malloc(sizeof(*m->name_re));
649 if (! m->name_re)
650 return -1;
651 if (regcomp(m->name_re, name_re, REG_EXTENDED | REG_ICASE | REG_NOSUB))
652 return -1;
653 }
654 return 0;
655 } /* string_matcher_init */
657 static void
658 string_matcher_destroy(string_matcher_t *m)
659 {
660 if (m->name)
661 free(m->name);
662 if (m->name_re) {
663 regfree(m->name_re);
664 free(m->name_re);
665 }
666 } /* string_matcher_destroy */
668 static char *
669 string_tostring(string_matcher_t *m, char *buf, size_t buflen)
670 {
671 snprintf(buf, buflen, "{ %s%s%s, %p }",
672 m->name ? "'" : "", m->name ? m->name : "NULL", m->name ? "'" : "",
673 m->name_re);
674 return buf;
675 } /* string_tostring */
677 /* initializes a name matcher */
678 static int
679 name_matcher_init(sdb_object_t *obj, va_list ap)
680 {
681 name_matcher_t *m = NAME_M(obj);
682 M(obj)->type = MATCHER_NAME;
683 return string_matcher_init(&m->name, ap);
684 } /* name_matcher_init */
686 static void
687 name_matcher_destroy(sdb_object_t *obj)
688 {
689 name_matcher_t *m = NAME_M(obj);
690 string_matcher_destroy(&m->name);
691 } /* name_matcher_destroy */
693 static char *
694 name_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
695 {
696 char name[buflen + 1];
697 assert(m->type == MATCHER_NAME);
698 snprintf(buf, buflen, "OBJ[%s]{ NAME%s }",
699 SDB_STORE_TYPE_TO_NAME(NAME_M(m)->obj_type),
700 string_tostring(&NAME_M(m)->name, name, sizeof(name)));
701 return buf;
702 } /* name_tostring */
704 static int
705 attr_matcher_init(sdb_object_t *obj, va_list ap)
706 {
707 attr_matcher_t *attr = ATTR_M(obj);
708 const char *name = va_arg(ap, const char *);
710 M(obj)->type = MATCHER_ATTR;
711 if (name) {
712 attr->name = strdup(name);
713 if (! attr->name)
714 return -1;
715 }
716 return string_matcher_init(&attr->value, ap);
717 } /* attr_matcher_init */
719 static void
720 attr_matcher_destroy(sdb_object_t *obj)
721 {
722 attr_matcher_t *attr = ATTR_M(obj);
723 if (attr->name)
724 free(attr->name);
725 attr->name = NULL;
726 string_matcher_destroy(&attr->value);
727 } /* attr_matcher_destroy */
729 static char *
730 attr_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
731 {
732 char value[buflen + 1];
734 if (! m) {
735 snprintf(buf, buflen, "ATTR{}");
736 return buf;
737 }
739 assert(m->type == MATCHER_ATTR);
740 snprintf(buf, buflen, "ATTR[%s]{ VALUE%s }", ATTR_M(m)->name,
741 string_tostring(&ATTR_M(m)->value, value, sizeof(value)));
742 return buf;
743 } /* attr_tostring */
745 static int
746 cond_matcher_init(sdb_object_t *obj, va_list ap)
747 {
748 int type = va_arg(ap, int);
749 sdb_store_cond_t *cond = va_arg(ap, sdb_store_cond_t *);
751 if (! cond)
752 return -1;
754 sdb_object_ref(SDB_OBJ(cond));
756 M(obj)->type = type;
757 COND_M(obj)->cond = cond;
758 return 0;
759 } /* cond_matcher_init */
761 static void
762 cond_matcher_destroy(sdb_object_t *obj)
763 {
764 sdb_object_deref(SDB_OBJ(COND_M(obj)->cond));
765 } /* cond_matcher_destroy */
767 static char *
768 cond_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
769 {
770 const char *type, *id;
771 sdb_data_t value = SDB_DATA_INIT;
772 char value_str[buflen];
773 sdb_store_expr_t *expr;
775 if (COND_M(m)->cond->cmp == attr_cmp) {
776 type = "ATTR";
777 id = ATTR_C(COND_M(m)->cond)->name;
778 expr = ATTR_C(COND_M(m)->cond)->expr;
779 }
780 else if (COND_M(m)->cond->cmp == obj_cmp) {
781 type = "OBJ";
782 id = SDB_FIELD_TO_NAME(OBJ_C(COND_M(m)->cond)->field);
783 expr = OBJ_C(COND_M(m)->cond)->expr;
784 }
785 else {
786 snprintf(buf, buflen, "<unknown>");
787 return buf;
788 }
790 if (sdb_store_expr_eval(expr, /* obj */ NULL, &value, /* filter */ NULL))
791 snprintf(value_str, sizeof(value_str), "ERR");
792 else if (sdb_data_format(&value, value_str, sizeof(value_str),
793 SDB_SINGLE_QUOTED) < 0)
794 snprintf(value_str, sizeof(value_str), "ERR");
795 snprintf(buf, buflen, "%s[%s]{ %s %s }", type, id,
796 MATCHER_SYM(m->type), value_str);
797 sdb_data_free_datum(&value);
798 return buf;
799 } /* cond_tostring */
801 static int
802 op_matcher_init(sdb_object_t *obj, va_list ap)
803 {
804 M(obj)->type = va_arg(ap, int);
805 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
806 return -1;
808 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
809 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
810 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
811 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
813 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
814 return -1;
815 return 0;
816 } /* op_matcher_init */
818 static void
819 op_matcher_destroy(sdb_object_t *obj)
820 {
821 if (OP_M(obj)->left)
822 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
823 if (OP_M(obj)->right)
824 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
825 } /* op_matcher_destroy */
827 static char *
828 op_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
829 {
830 char left[buflen + 1], right[buflen + 1];
832 if (! m) {
833 /* this should not happen */
834 snprintf(buf, buflen, "()");
835 return buf;
836 }
838 assert((m->type == MATCHER_OR) || (m->type == MATCHER_AND));
839 snprintf(buf, buflen, "(%s, %s, %s)",
840 m->type == MATCHER_OR ? "OR" : "AND",
841 sdb_store_matcher_tostring(OP_M(m)->left, left, sizeof(left)),
842 sdb_store_matcher_tostring(OP_M(m)->right, right, sizeof(right)));
843 return buf;
844 } /* op_tostring */
846 static int
847 child_matcher_init(sdb_object_t *obj, va_list ap)
848 {
849 M(obj)->type = va_arg(ap, int);
850 CHILD_M(obj)->m = va_arg(ap, sdb_store_matcher_t *);
852 if (! CHILD_M(obj)->m)
853 return -1;
855 sdb_object_ref(SDB_OBJ(CHILD_M(obj)->m));
856 return 0;
857 } /* child_matcher_init */
859 static void
860 child_matcher_destroy(sdb_object_t *obj)
861 {
862 sdb_object_deref(SDB_OBJ(CHILD_M(obj)->m));
863 } /* child_matcher_destroy */
865 static char *
866 child_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
867 {
868 snprintf(buf, buflen, "%s:", MATCHER_SYM(m->type));
869 buf[buflen - 1] = '\0';
870 sdb_store_matcher_tostring(CHILD_M(m)->m,
871 buf + strlen(buf), buflen - strlen(buf));
872 return buf;
873 } /* child_tostring */
875 static int
876 cmp_matcher_init(sdb_object_t *obj, va_list ap)
877 {
878 M(obj)->type = va_arg(ap, int);
880 CMP_M(obj)->left = va_arg(ap, sdb_store_expr_t *);
881 sdb_object_ref(SDB_OBJ(CMP_M(obj)->left));
882 CMP_M(obj)->right = va_arg(ap, sdb_store_expr_t *);
883 sdb_object_ref(SDB_OBJ(CMP_M(obj)->right));
885 if ((! CMP_M(obj)->left) || (! CMP_M(obj)->right))
886 return -1;
887 return 0;
888 } /* cmp_matcher_init */
890 static void
891 cmp_matcher_destroy(sdb_object_t *obj)
892 {
893 sdb_object_deref(SDB_OBJ(CMP_M(obj)->left));
894 sdb_object_deref(SDB_OBJ(CMP_M(obj)->right));
895 } /* cmp_matcher_destroy */
897 static char *
898 cmp_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
899 {
900 if (! m) {
901 /* this should not happen */
902 snprintf(buf, buflen, "()");
903 return buf;
904 }
906 /* TODO */
907 snprintf(buf, buflen, "CMP_MATCHER(%d)", m->type);
908 return buf;
909 } /* cmp_tostring */
911 static int
912 uop_matcher_init(sdb_object_t *obj, va_list ap)
913 {
914 M(obj)->type = va_arg(ap, int);
915 if (M(obj)->type != MATCHER_NOT)
916 return -1;
918 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
919 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
921 if (! UOP_M(obj)->op)
922 return -1;
923 return 0;
924 } /* uop_matcher_init */
926 static void
927 uop_matcher_destroy(sdb_object_t *obj)
928 {
929 if (UOP_M(obj)->op)
930 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
931 } /* uop_matcher_destroy */
933 static char *
934 uop_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
935 {
936 char op[buflen + 1];
938 if (! m) {
939 /* this should not happen */
940 snprintf(buf, buflen, "()");
941 return buf;
942 }
944 assert(m->type == MATCHER_NOT);
945 snprintf(buf, buflen, "(NOT, %s)",
946 sdb_store_matcher_tostring(UOP_M(m)->op, op, sizeof(op)));
947 return buf;
948 } /* uop_tostring */
950 static int
951 isnull_matcher_init(sdb_object_t *obj, va_list ap)
952 {
953 const char *name;
955 M(obj)->type = va_arg(ap, int);
956 if (M(obj)->type != MATCHER_ISNULL)
957 return -1;
959 name = va_arg(ap, const char *);
960 if (! name)
961 return -1;
962 ISNULL_M(obj)->attr_name = strdup(name);
963 if (! ISNULL_M(obj)->attr_name)
964 return -1;
965 return 0;
966 } /* isnull_matcher_init */
968 static void
969 isnull_matcher_destroy(sdb_object_t *obj)
970 {
971 if (ISNULL_M(obj)->attr_name)
972 free(ISNULL_M(obj)->attr_name);
973 ISNULL_M(obj)->attr_name = NULL;
974 } /* isnull_matcher_destroy */
976 static char *
977 isnull_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
978 {
979 snprintf(buf, buflen, "(IS NULL, ATTR[%s])", ISNULL_M(m)->attr_name);
980 return buf;
981 } /* isnull_tostring */
983 static sdb_type_t name_type = {
984 /* size = */ sizeof(name_matcher_t),
985 /* init = */ name_matcher_init,
986 /* destroy = */ name_matcher_destroy,
987 };
989 static sdb_type_t attr_type = {
990 /* size = */ sizeof(attr_matcher_t),
991 /* init = */ attr_matcher_init,
992 /* destroy = */ attr_matcher_destroy,
993 };
995 static sdb_type_t cond_type = {
996 /* size = */ sizeof(cond_matcher_t),
997 /* init = */ cond_matcher_init,
998 /* destroy = */ cond_matcher_destroy,
999 };
1001 static sdb_type_t op_type = {
1002 /* size = */ sizeof(op_matcher_t),
1003 /* init = */ op_matcher_init,
1004 /* destroy = */ op_matcher_destroy,
1005 };
1007 static sdb_type_t uop_type = {
1008 /* size = */ sizeof(uop_matcher_t),
1009 /* init = */ uop_matcher_init,
1010 /* destroy = */ uop_matcher_destroy,
1011 };
1013 static sdb_type_t child_type = {
1014 /* size = */ sizeof(child_matcher_t),
1015 /* init = */ child_matcher_init,
1016 /* destroy = */ child_matcher_destroy,
1017 };
1019 static sdb_type_t cmp_type = {
1020 /* size = */ sizeof(cmp_matcher_t),
1021 /* init = */ cmp_matcher_init,
1022 /* destroy = */ cmp_matcher_destroy,
1023 };
1025 static sdb_type_t isnull_type = {
1026 /* size = */ sizeof(isnull_matcher_t),
1027 /* init = */ isnull_matcher_init,
1028 /* destroy = */ isnull_matcher_destroy,
1029 };
1031 typedef char *(*matcher_tostring_cb)(sdb_store_matcher_t *, char *, size_t);
1033 /* this array needs to be indexable by the matcher types;
1034 * -> update the enum in store-private.h when updating this */
1035 static matcher_tostring_cb
1036 matchers_tostring[] = {
1037 op_tostring,
1038 op_tostring,
1039 uop_tostring,
1040 name_tostring,
1041 attr_tostring,
1042 child_tostring,
1043 child_tostring,
1044 child_tostring,
1045 cond_tostring,
1046 cond_tostring,
1047 cond_tostring,
1048 cond_tostring,
1049 cond_tostring,
1050 cmp_tostring,
1051 cmp_tostring,
1052 cmp_tostring,
1053 cmp_tostring,
1054 cmp_tostring,
1055 cmp_tostring,
1056 cmp_tostring,
1057 cmp_tostring,
1058 isnull_tostring,
1059 };
1061 /*
1062 * public API
1063 */
1065 sdb_store_cond_t *
1066 sdb_store_attr_cond(const char *name, sdb_store_expr_t *expr)
1067 {
1068 return SDB_STORE_COND(sdb_object_create("attr-cond", attr_cond_type,
1069 name, expr));
1070 } /* sdb_store_attr_cond */
1072 sdb_store_cond_t *
1073 sdb_store_obj_cond(int field, sdb_store_expr_t *expr)
1074 {
1075 return SDB_STORE_COND(sdb_object_create("obj-cond", obj_cond_type,
1076 field, expr));
1077 } /* sdb_store_obj_cond */
1079 sdb_store_matcher_t *
1080 sdb_store_name_matcher(int type, const char *name, _Bool re)
1081 {
1082 sdb_store_matcher_t *m;
1084 if (re)
1085 m = M(sdb_object_create("name-matcher", name_type, NULL, name));
1086 else
1087 m = M(sdb_object_create("name-matcher", name_type, name, NULL));
1089 if (! m)
1090 return NULL;
1092 NAME_M(m)->obj_type = type;
1093 return m;
1094 } /* sdb_store_name_matcher */
1096 sdb_store_matcher_t *
1097 sdb_store_attr_matcher(const char *name, const char *value, _Bool re)
1098 {
1099 sdb_store_matcher_t *m;
1101 if (! name)
1102 return NULL;
1104 if (re)
1105 m = M(sdb_object_create("attr-matcher", attr_type,
1106 name, NULL, value));
1107 else
1108 m = M(sdb_object_create("attr-matcher", attr_type,
1109 name, value, NULL));
1110 return m;
1111 } /* sdb_store_attr_matcher */
1113 sdb_store_matcher_t *
1114 sdb_store_child_matcher(int type, sdb_store_matcher_t *m)
1115 {
1116 if (type == SDB_SERVICE)
1117 type = MATCHER_SERVICE;
1118 else if (type == SDB_METRIC)
1119 type = MATCHER_METRIC;
1120 else if (type == SDB_ATTRIBUTE)
1121 type = MATCHER_ATTRIBUTE;
1122 else
1123 return NULL;
1124 return M(sdb_object_create("any-matcher", child_type, type, m));
1125 } /* sdb_store_child_matcher */
1127 sdb_store_matcher_t *
1128 sdb_store_lt_matcher(sdb_store_cond_t *cond)
1129 {
1130 return M(sdb_object_create("lt-matcher", cond_type,
1131 MATCHER_LT, cond));
1132 } /* sdb_store_lt_matcher */
1134 sdb_store_matcher_t *
1135 sdb_store_le_matcher(sdb_store_cond_t *cond)
1136 {
1137 return M(sdb_object_create("le-matcher", cond_type,
1138 MATCHER_LE, cond));
1139 } /* sdb_store_le_matcher */
1141 sdb_store_matcher_t *
1142 sdb_store_eq_matcher(sdb_store_cond_t *cond)
1143 {
1144 return M(sdb_object_create("eq-matcher", cond_type,
1145 MATCHER_EQ, cond));
1146 } /* sdb_store_eq_matcher */
1148 sdb_store_matcher_t *
1149 sdb_store_ge_matcher(sdb_store_cond_t *cond)
1150 {
1151 return M(sdb_object_create("ge-matcher", cond_type,
1152 MATCHER_GE, cond));
1153 } /* sdb_store_ge_matcher */
1155 sdb_store_matcher_t *
1156 sdb_store_gt_matcher(sdb_store_cond_t *cond)
1157 {
1158 return M(sdb_object_create("gt-matcher", cond_type,
1159 MATCHER_GT, cond));
1160 } /* sdb_store_gt_matcher */
1162 /*
1163 * TODO: Rename sdb_store_cmp_* to sdb_store_* once the old code is unused and
1164 * has been removed.
1165 */
1167 sdb_store_matcher_t *
1168 sdb_store_cmp_lt(sdb_store_expr_t *left, sdb_store_expr_t *right)
1169 {
1170 return M(sdb_object_create("lt-matcher", cmp_type,
1171 MATCHER_CMP_LT, left, right));
1172 } /* sdb_store_cmp_lt */
1174 sdb_store_matcher_t *
1175 sdb_store_cmp_le(sdb_store_expr_t *left, sdb_store_expr_t *right)
1176 {
1177 return M(sdb_object_create("le-matcher", cmp_type,
1178 MATCHER_CMP_LE, left, right));
1179 } /* sdb_store_cmp_le */
1181 sdb_store_matcher_t *
1182 sdb_store_cmp_eq(sdb_store_expr_t *left, sdb_store_expr_t *right)
1183 {
1184 return M(sdb_object_create("eq-matcher", cmp_type,
1185 MATCHER_CMP_EQ, left, right));
1186 } /* sdb_store_cmp_eq */
1188 sdb_store_matcher_t *
1189 sdb_store_cmp_ne(sdb_store_expr_t *left, sdb_store_expr_t *right)
1190 {
1191 return M(sdb_object_create("ne-matcher", cmp_type,
1192 MATCHER_CMP_NE, left, right));
1193 } /* sdb_store_cmp_ne */
1195 sdb_store_matcher_t *
1196 sdb_store_cmp_ge(sdb_store_expr_t *left, sdb_store_expr_t *right)
1197 {
1198 return M(sdb_object_create("ge-matcher", cmp_type,
1199 MATCHER_CMP_GE, left, right));
1200 } /* sdb_store_cmp_ge */
1202 sdb_store_matcher_t *
1203 sdb_store_cmp_gt(sdb_store_expr_t *left, sdb_store_expr_t *right)
1204 {
1205 return M(sdb_object_create("gt-matcher", cmp_type,
1206 MATCHER_CMP_GT, left, right));
1207 } /* sdb_store_cmp_gt */
1209 sdb_store_matcher_t *
1210 sdb_store_regex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
1211 {
1212 if (! right->type) {
1213 if ((right->data.type != SDB_TYPE_STRING)
1214 && (right->data.type != SDB_TYPE_REGEX))
1215 return NULL;
1217 if (right->data.type == SDB_TYPE_STRING) {
1218 char *raw = right->data.data.string;
1219 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &right->data))
1220 return NULL;
1221 free(raw);
1222 }
1223 }
1224 return M(sdb_object_create("regex-matcher", cmp_type,
1225 MATCHER_REGEX, left, right));
1226 } /* sdb_store_regex_matcher */
1228 sdb_store_matcher_t *
1229 sdb_store_nregex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
1230 {
1231 sdb_store_matcher_t *m = sdb_store_regex_matcher(left, right);
1232 if (! m)
1233 return NULL;
1234 m->type = MATCHER_NREGEX;
1235 return m;
1236 } /* sdb_store_nregex_matcher */
1238 sdb_store_matcher_t *
1239 sdb_store_isnull_matcher(const char *attr_name)
1240 {
1241 return M(sdb_object_create("isnull-matcher", isnull_type,
1242 MATCHER_ISNULL, attr_name));
1243 } /* sdb_store_isnull_matcher */
1245 int
1246 sdb_store_parse_object_type_plural(const char *name)
1247 {
1248 if (! strcasecmp(name, "hosts"))
1249 return SDB_HOST;
1250 else if (! strcasecmp(name, "services"))
1251 return SDB_SERVICE;
1252 else if (! strcasecmp(name, "metrics"))
1253 return SDB_METRIC;
1254 return -1;
1255 } /* sdb_store_parse_object_type_plural */
1257 int
1258 sdb_store_parse_field_name(const char *name)
1259 {
1260 if (! strcasecmp(name, "name"))
1261 return SDB_FIELD_NAME;
1262 else if (! strcasecmp(name, "last_update"))
1263 return SDB_FIELD_LAST_UPDATE;
1264 else if (! strcasecmp(name, "age"))
1265 return SDB_FIELD_AGE;
1266 else if (! strcasecmp(name, "interval"))
1267 return SDB_FIELD_INTERVAL;
1268 else if (! strcasecmp(name, "backend"))
1269 return SDB_FIELD_BACKEND;
1270 return -1;
1271 } /* sdb_store_parse_field_name */
1273 static sdb_store_matcher_t *
1274 maybe_inv_matcher(sdb_store_matcher_t *m, _Bool inv)
1275 {
1276 sdb_store_matcher_t *tmp;
1278 if ((! m) || (! inv))
1279 return m;
1281 tmp = sdb_store_inv_matcher(m);
1282 /* pass ownership to the inverse matcher */
1283 sdb_object_deref(SDB_OBJ(m));
1284 return tmp;
1285 } /* maybe_inv_matcher */
1287 static int
1288 parse_cond_op(const char *op,
1289 sdb_store_matcher_t *(**matcher)(sdb_store_cond_t *), _Bool *inv)
1290 {
1291 *inv = 0;
1292 if (! strcasecmp(op, "<"))
1293 *matcher = sdb_store_lt_matcher;
1294 else if (! strcasecmp(op, "<="))
1295 *matcher = sdb_store_le_matcher;
1296 else if (! strcasecmp(op, "="))
1297 *matcher = sdb_store_eq_matcher;
1298 else if (! strcasecmp(op, ">="))
1299 *matcher = sdb_store_ge_matcher;
1300 else if (! strcasecmp(op, ">"))
1301 *matcher = sdb_store_gt_matcher;
1302 else if (! strcasecmp(op, "!=")) {
1303 *matcher = sdb_store_eq_matcher;
1304 *inv = 1;
1305 }
1306 else
1307 return -1;
1308 return 0;
1309 } /* parse_cond_op */
1311 static sdb_store_matcher_t *
1312 parse_attr_cmp(const char *attr, const char *op, sdb_store_expr_t *expr)
1313 {
1314 sdb_store_matcher_t *(*matcher)(sdb_store_cond_t *) = NULL;
1315 sdb_store_matcher_t *m;
1316 sdb_store_cond_t *cond;
1317 _Bool inv = 0;
1319 if (! attr)
1320 return NULL;
1322 if (! strcasecmp(op, "IS")) {
1323 if (! expr)
1324 return sdb_store_isnull_matcher(attr);
1325 else
1326 return NULL;
1327 }
1328 else if (! expr)
1329 return NULL;
1330 else if (parse_cond_op(op, &matcher, &inv))
1331 return NULL;
1333 cond = sdb_store_attr_cond(attr, expr);
1334 if (! cond)
1335 return NULL;
1337 m = matcher(cond);
1338 /* pass ownership to 'm' or destroy in case of an error */
1339 sdb_object_deref(SDB_OBJ(cond));
1340 return maybe_inv_matcher(m, inv);
1341 } /* parse_attr_cmp */
1343 sdb_store_matcher_t *
1344 sdb_store_matcher_parse_cmp(const char *obj_type, const char *attr,
1345 const char *op, sdb_store_expr_t *expr)
1346 {
1347 int type = -1;
1348 _Bool inv = 0;
1349 _Bool re = 0;
1351 sdb_data_t value = SDB_DATA_INIT;
1352 sdb_store_matcher_t *m = NULL;
1354 if (! strcasecmp(obj_type, "host"))
1355 type = SDB_HOST;
1356 else if (! strcasecmp(obj_type, "service"))
1357 type = SDB_SERVICE;
1358 else if (! strcasecmp(obj_type, "metric"))
1359 type = SDB_METRIC;
1360 else if (! strcasecmp(obj_type, "attribute"))
1361 type = SDB_ATTRIBUTE;
1362 else
1363 return NULL;
1365 /* XXX: this code sucks! */
1366 if (! strcasecmp(op, "=")) {
1367 /* nothing to do */
1368 }
1369 else if (! strcasecmp(op, "!=")) {
1370 inv = 1;
1371 }
1372 else if (! strcasecmp(op, "=~")) {
1373 re = 1;
1374 }
1375 else if (! strcasecmp(op, "!~")) {
1376 inv = 1;
1377 re = 1;
1378 }
1379 else if (type == SDB_ATTRIBUTE)
1380 return parse_attr_cmp(attr, op, expr);
1381 else
1382 return NULL;
1384 if (! expr)
1385 return NULL;
1387 if (sdb_store_expr_eval(expr, /* obj */ NULL, &value, /* filter */ NULL)
1388 || (value.type != SDB_TYPE_STRING)) {
1389 sdb_data_free_datum(&value);
1390 if (type != SDB_ATTRIBUTE)
1391 return NULL;
1392 return parse_attr_cmp(attr, op, expr);
1393 }
1395 if (! attr)
1396 m = sdb_store_name_matcher(type, value.data.string, re);
1397 else if (type == SDB_ATTRIBUTE)
1398 m = sdb_store_attr_matcher(attr, value.data.string, re);
1400 sdb_data_free_datum(&value);
1401 return maybe_inv_matcher(m, inv);
1402 } /* sdb_store_matcher_parse_cmp */
1404 sdb_store_matcher_t *
1405 sdb_store_matcher_parse_field_cmp(const char *name, const char *op,
1406 sdb_store_expr_t *expr)
1407 {
1408 sdb_store_matcher_t *(*matcher)(sdb_store_cond_t *) = NULL;
1409 sdb_store_matcher_t *m;
1410 sdb_store_cond_t *cond;
1411 _Bool inv = 0;
1413 int field;
1415 if (! expr)
1416 return NULL;
1418 field = sdb_store_parse_field_name(name);
1419 if (field < 0)
1420 return NULL;
1422 if (parse_cond_op(op, &matcher, &inv))
1423 return NULL;
1424 cond = sdb_store_obj_cond(field, expr);
1425 if (! cond)
1426 return NULL;
1428 assert(matcher);
1429 m = matcher(cond);
1430 /* pass ownership to 'm' or destroy in case of an error */
1431 sdb_object_deref(SDB_OBJ(cond));
1432 return maybe_inv_matcher(m, inv);
1433 } /* sdb_store_matcher_parse_field_cmp */
1435 sdb_store_matcher_t *
1436 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
1437 {
1438 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
1439 left, right));
1440 } /* sdb_store_dis_matcher */
1442 sdb_store_matcher_t *
1443 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
1444 {
1445 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
1446 left, right));
1447 } /* sdb_store_con_matcher */
1449 sdb_store_matcher_t *
1450 sdb_store_inv_matcher(sdb_store_matcher_t *m)
1451 {
1452 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
1453 } /* sdb_store_inv_matcher */
1455 int
1456 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
1457 sdb_store_matcher_t *filter)
1458 {
1459 if (filter && (! sdb_store_matcher_matches(filter, obj, NULL)))
1460 return 0;
1462 /* "NULL" always matches */
1463 if ((! m) || (! obj))
1464 return 1;
1466 if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
1467 return 0;
1469 return matchers[m->type](m, obj, filter);
1470 } /* sdb_store_matcher_matches */
1472 char *
1473 sdb_store_matcher_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
1474 {
1475 if (! m)
1476 return NULL;
1478 if ((m->type < 0)
1479 || (((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers_tostring))))
1480 return NULL;
1481 return matchers_tostring[m->type](m, buf, buflen);
1482 } /* sdb_store_matcher_tostring */
1484 int
1485 sdb_store_scan(sdb_store_matcher_t *m, sdb_store_matcher_t *filter,
1486 sdb_store_lookup_cb cb, void *user_data)
1487 {
1488 scan_iter_data_t data = { m, filter, cb, user_data };
1490 if (! cb)
1491 return -1;
1492 return sdb_store_iterate(scan_iter, &data);
1493 } /* sdb_store_scan */
1495 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */