f95f8ca0bc6a0a4fec8cb724e56304290ab57c78
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 /*
78 * matcher implementations
79 */
81 static int
82 match_logical(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
83 sdb_store_matcher_t *filter)
84 {
85 int status;
87 assert((m->type == MATCHER_AND) || (m->type == MATCHER_OR));
88 assert(OP_M(m)->left && OP_M(m)->right);
90 status = sdb_store_matcher_matches(OP_M(m)->left, obj, filter);
92 /* lazy evaluation */
93 if ((! status) && (m->type == MATCHER_AND))
94 return status;
95 else if (status && (m->type == MATCHER_OR))
96 return status;
98 return sdb_store_matcher_matches(OP_M(m)->right, obj, filter);
99 } /* match_logical */
101 static int
102 match_unary(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
103 sdb_store_matcher_t *filter)
104 {
105 assert(m->type == MATCHER_NOT);
106 assert(UOP_M(m)->op);
108 return !sdb_store_matcher_matches(UOP_M(m)->op, obj, filter);
109 } /* match_unary */
111 static int
112 match_iter(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
113 sdb_store_matcher_t *filter)
114 {
115 sdb_avltree_iter_t *iter = NULL;
116 int status;
117 int all = 0;
119 assert(m->type == MATCHER_ANY);
121 /* TODO: support all object types */
122 if (obj->type != SDB_HOST)
123 return 0;
125 /* negated matchers should only match if the respective positive matchers
126 * do not match; that is if the negated matcher matchers *all* children */
127 if ((ITER_M(m)->m->type == MATCHER_NE)
128 || (ITER_M(m)->m->type == MATCHER_NREGEX))
129 all = 1;
131 if (ITER_M(m)->type == SDB_SERVICE)
132 iter = sdb_avltree_get_iter(HOST(obj)->services);
133 else if (ITER_M(m)->type == SDB_METRIC)
134 iter = sdb_avltree_get_iter(HOST(obj)->metrics);
135 else if (ITER_M(m)->type == SDB_ATTRIBUTE)
136 iter = sdb_avltree_get_iter(HOST(obj)->attributes);
138 status = all;
139 while (sdb_avltree_iter_has_next(iter)) {
140 sdb_store_obj_t *child = STORE_OBJ(sdb_avltree_iter_get_next(iter));
141 if (filter && (! sdb_store_matcher_matches(filter, child, NULL)))
142 continue;
144 if (sdb_store_matcher_matches(ITER_M(m)->m, child, filter)) {
145 if (! all) {
146 status = 1;
147 break;
148 }
149 } else if (all) {
150 status = 0;
151 break;
152 }
153 }
154 sdb_avltree_iter_destroy(iter);
155 return status;
156 } /* match_iter */
158 /*
159 * cmp_expr:
160 * Compare the values of two expressions when evaluating them using the
161 * specified stored object and filter. Returns a value less than, equal to, or
162 * greater than zero if the value of the first expression compares less than,
163 * equal to, or greater than the value of the second expression. Returns
164 * INT_MAX if any of the expressions could not be evaluated or if any of them
165 * evaluated to NULL.
166 */
167 static int
168 cmp_expr(sdb_store_expr_t *e1, sdb_store_expr_t *e2,
169 sdb_store_obj_t *obj, sdb_store_matcher_t *filter)
170 {
171 sdb_data_t v1 = SDB_DATA_INIT, v2 = SDB_DATA_INIT;
172 int status;
174 if (sdb_store_expr_eval(e1, obj, &v1, filter))
175 return INT_MAX;
176 if (sdb_store_expr_eval(e2, obj, &v2, filter)) {
177 sdb_data_free_datum(&v1);
178 return INT_MAX;
179 }
181 if (sdb_data_isnull(&v1) || (sdb_data_isnull(&v2)))
182 status = INT_MAX;
183 else if (v1.type == v2.type)
184 status = sdb_data_cmp(&v1, &v2);
185 else if ((e1->data_type >= 0) && (e2->data_type >= 0))
186 status = INT_MAX;
187 else
188 status = sdb_data_strcmp(&v1, &v2);
190 sdb_data_free_datum(&v1);
191 sdb_data_free_datum(&v2);
192 return status;
193 } /* cmp_expr */
195 static int
196 match_lt(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
197 sdb_store_matcher_t *filter)
198 {
199 int status;
200 assert(m->type == MATCHER_LT);
201 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
202 return (status != INT_MAX) && (status < 0);
203 } /* match_lt */
205 static int
206 match_le(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
207 sdb_store_matcher_t *filter)
208 {
209 int status;
210 assert(m->type == MATCHER_LE);
211 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
212 return (status != INT_MAX) && (status <= 0);
213 } /* match_le */
215 static int
216 match_eq(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
217 sdb_store_matcher_t *filter)
218 {
219 int status;
220 assert(m->type == MATCHER_EQ);
221 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
222 return (status != INT_MAX) && (! status);
223 } /* match_eq */
225 static int
226 match_ne(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
227 sdb_store_matcher_t *filter)
228 {
229 int status;
230 assert(m->type == MATCHER_NE);
231 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
232 return (status != INT_MAX) && status;
233 } /* match_ne */
235 static int
236 match_ge(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
237 sdb_store_matcher_t *filter)
238 {
239 int status;
240 assert(m->type == MATCHER_GE);
241 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
242 return (status != INT_MAX) && (status >= 0);
243 } /* match_ge */
245 static int
246 match_gt(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
247 sdb_store_matcher_t *filter)
248 {
249 int status;
250 assert(m->type == MATCHER_GT);
251 status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
252 return (status != INT_MAX) && (status > 0);
253 } /* match_gt */
255 static int
256 match_in(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
257 sdb_store_matcher_t *filter)
258 {
259 sdb_data_t value = SDB_DATA_INIT, array = SDB_DATA_INIT;
260 int status = 1;
262 assert(m->type == MATCHER_IN);
264 if ((sdb_store_expr_eval(CMP_M(m)->left, obj, &value, filter))
265 || (sdb_store_expr_eval(CMP_M(m)->right, obj, &array, filter)))
266 status = 0;
268 if (status)
269 status = sdb_data_inarray(&value, &array);
271 sdb_data_free_datum(&value);
272 sdb_data_free_datum(&array);
273 return status;
274 } /* match_in */
276 static int
277 match_regex(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
278 sdb_store_matcher_t *filter)
279 {
280 sdb_data_t v = SDB_DATA_INIT;
281 int status = 0;
283 regex_t regex;
284 _Bool free_regex = 0;
286 assert((m->type == MATCHER_REGEX)
287 || (m->type == MATCHER_NREGEX));
289 if (! CMP_M(m)->right->type) {
290 assert(CMP_M(m)->right->data.type == SDB_TYPE_REGEX);
291 regex = CMP_M(m)->right->data.data.re.regex;
292 }
293 else {
294 sdb_data_t tmp = SDB_DATA_INIT;
295 char *raw;
297 if (sdb_store_expr_eval(CMP_M(m)->right, obj, &tmp, filter))
298 return 0;
300 if (tmp.type != SDB_TYPE_STRING) {
301 sdb_data_free_datum(&tmp);
302 return 0;
303 }
305 raw = tmp.data.string;
306 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &tmp)) {
307 free(raw);
308 return 0;
309 }
311 regex = tmp.data.re.regex;
312 free_regex = 1;
313 free(tmp.data.re.raw);
314 free(raw);
315 }
317 if ((sdb_store_expr_eval(CMP_M(m)->left, obj, &v, filter))
318 || (sdb_data_isnull(&v)))
319 status = 0;
320 else {
321 char value[sdb_data_strlen(&v) + 1];
322 if (sdb_data_format(&v, value, sizeof(value), SDB_UNQUOTED) < 0)
323 status = 0;
324 else if (! regexec(®ex, value, 0, NULL, 0))
325 status = 1;
326 }
328 if (free_regex)
329 regfree(®ex);
330 sdb_data_free_datum(&v);
331 if (m->type == MATCHER_NREGEX)
332 return !status;
333 return status;
334 } /* match_regex */
336 static int
337 match_isnull(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
338 sdb_store_matcher_t *filter)
339 {
340 sdb_data_t v = SDB_DATA_INIT;
341 int status;
343 assert((m->type == MATCHER_ISNULL) || (m->type == MATCHER_ISNNULL));
345 /* TODO: this might hide real errors;
346 * improve error reporting and propagation */
347 if (sdb_store_expr_eval(ISNULL_M(m)->expr, obj, &v, filter)
348 || sdb_data_isnull(&v))
349 status = 1;
350 else
351 status = 0;
353 sdb_data_free_datum(&v);
354 if (m->type == MATCHER_ISNNULL)
355 return !status;
356 return status;
357 } /* match_isnull */
359 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_obj_t *,
360 sdb_store_matcher_t *);
362 /* this array needs to be indexable by the matcher types;
363 * -> update the enum in store-private.h when updating this */
364 static matcher_cb
365 matchers[] = {
366 match_logical,
367 match_logical,
368 match_unary,
369 match_iter,
370 match_lt,
371 match_le,
372 match_eq,
373 match_ne,
374 match_ge,
375 match_gt,
376 match_in,
377 match_regex,
378 match_regex,
379 match_isnull,
380 match_isnull,
381 };
383 /*
384 * private matcher types
385 */
387 static int
388 op_matcher_init(sdb_object_t *obj, va_list ap)
389 {
390 M(obj)->type = va_arg(ap, int);
391 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
392 return -1;
394 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
395 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
396 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
397 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
399 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
400 return -1;
401 return 0;
402 } /* op_matcher_init */
404 static void
405 op_matcher_destroy(sdb_object_t *obj)
406 {
407 if (OP_M(obj)->left)
408 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
409 if (OP_M(obj)->right)
410 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
411 } /* op_matcher_destroy */
413 static int
414 iter_matcher_init(sdb_object_t *obj, va_list ap)
415 {
416 M(obj)->type = va_arg(ap, int);
417 ITER_M(obj)->type = va_arg(ap, int);
418 ITER_M(obj)->m = va_arg(ap, sdb_store_matcher_t *);
420 if (! ITER_M(obj)->m)
421 return -1;
423 sdb_object_ref(SDB_OBJ(ITER_M(obj)->m));
424 return 0;
425 } /* iter_matcher_init */
427 static void
428 iter_matcher_destroy(sdb_object_t *obj)
429 {
430 sdb_object_deref(SDB_OBJ(ITER_M(obj)->m));
431 } /* iter_matcher_destroy */
433 static int
434 cmp_matcher_init(sdb_object_t *obj, va_list ap)
435 {
436 M(obj)->type = va_arg(ap, int);
438 CMP_M(obj)->left = va_arg(ap, sdb_store_expr_t *);
439 sdb_object_ref(SDB_OBJ(CMP_M(obj)->left));
440 CMP_M(obj)->right = va_arg(ap, sdb_store_expr_t *);
441 sdb_object_ref(SDB_OBJ(CMP_M(obj)->right));
443 if ((! CMP_M(obj)->left) || (! CMP_M(obj)->right))
444 return -1;
445 return 0;
446 } /* cmp_matcher_init */
448 static void
449 cmp_matcher_destroy(sdb_object_t *obj)
450 {
451 sdb_object_deref(SDB_OBJ(CMP_M(obj)->left));
452 sdb_object_deref(SDB_OBJ(CMP_M(obj)->right));
453 } /* cmp_matcher_destroy */
455 static int
456 uop_matcher_init(sdb_object_t *obj, va_list ap)
457 {
458 M(obj)->type = va_arg(ap, int);
459 if (M(obj)->type != MATCHER_NOT)
460 return -1;
462 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
463 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
465 if (! UOP_M(obj)->op)
466 return -1;
467 return 0;
468 } /* uop_matcher_init */
470 static void
471 uop_matcher_destroy(sdb_object_t *obj)
472 {
473 if (UOP_M(obj)->op)
474 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
475 } /* uop_matcher_destroy */
477 static int
478 isnull_matcher_init(sdb_object_t *obj, va_list ap)
479 {
480 M(obj)->type = va_arg(ap, int);
481 if ((M(obj)->type != MATCHER_ISNULL) && (M(obj)->type != MATCHER_ISNNULL))
482 return -1;
484 ISNULL_M(obj)->expr = va_arg(ap, sdb_store_expr_t *);
485 sdb_object_ref(SDB_OBJ(ISNULL_M(obj)->expr));
486 return 0;
487 } /* isnull_matcher_init */
489 static void
490 isnull_matcher_destroy(sdb_object_t *obj)
491 {
492 sdb_object_deref(SDB_OBJ(ISNULL_M(obj)->expr));
493 ISNULL_M(obj)->expr = NULL;
494 } /* isnull_matcher_destroy */
496 static sdb_type_t op_type = {
497 /* size = */ sizeof(op_matcher_t),
498 /* init = */ op_matcher_init,
499 /* destroy = */ op_matcher_destroy,
500 };
502 static sdb_type_t uop_type = {
503 /* size = */ sizeof(uop_matcher_t),
504 /* init = */ uop_matcher_init,
505 /* destroy = */ uop_matcher_destroy,
506 };
508 static sdb_type_t iter_type = {
509 /* size = */ sizeof(iter_matcher_t),
510 /* init = */ iter_matcher_init,
511 /* destroy = */ iter_matcher_destroy,
512 };
514 static sdb_type_t cmp_type = {
515 /* size = */ sizeof(cmp_matcher_t),
516 /* init = */ cmp_matcher_init,
517 /* destroy = */ cmp_matcher_destroy,
518 };
520 static sdb_type_t isnull_type = {
521 /* size = */ sizeof(isnull_matcher_t),
522 /* init = */ isnull_matcher_init,
523 /* destroy = */ isnull_matcher_destroy,
524 };
526 /*
527 * public API
528 */
530 sdb_store_matcher_t *
531 sdb_store_any_matcher(int type, sdb_store_matcher_t *m)
532 {
533 if ((type != SDB_SERVICE) && (type != SDB_METRIC)
534 && (type != SDB_ATTRIBUTE))
535 return NULL;
536 return M(sdb_object_create("any-matcher", iter_type,
537 MATCHER_ANY, type, m));
538 } /* sdb_store_iter_matcher */
540 sdb_store_matcher_t *
541 sdb_store_lt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
542 {
543 return M(sdb_object_create("lt-matcher", cmp_type,
544 MATCHER_LT, left, right));
545 } /* sdb_store_lt_matcher */
547 sdb_store_matcher_t *
548 sdb_store_le_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
549 {
550 return M(sdb_object_create("le-matcher", cmp_type,
551 MATCHER_LE, left, right));
552 } /* sdb_store_le_matcher */
554 sdb_store_matcher_t *
555 sdb_store_eq_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
556 {
557 return M(sdb_object_create("eq-matcher", cmp_type,
558 MATCHER_EQ, left, right));
559 } /* sdb_store_eq_matcher */
561 sdb_store_matcher_t *
562 sdb_store_ne_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
563 {
564 return M(sdb_object_create("ne-matcher", cmp_type,
565 MATCHER_NE, left, right));
566 } /* sdb_store_ne_matcher */
568 sdb_store_matcher_t *
569 sdb_store_ge_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
570 {
571 return M(sdb_object_create("ge-matcher", cmp_type,
572 MATCHER_GE, left, right));
573 } /* sdb_store_ge_matcher */
575 sdb_store_matcher_t *
576 sdb_store_gt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
577 {
578 return M(sdb_object_create("gt-matcher", cmp_type,
579 MATCHER_GT, left, right));
580 } /* sdb_store_gt_matcher */
582 sdb_store_matcher_t *
583 sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
584 {
585 return M(sdb_object_create("in-matcher", cmp_type,
586 MATCHER_IN, left, right));
587 } /* sdb_store_in_matcher */
589 sdb_store_matcher_t *
590 sdb_store_regex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
591 {
592 if (! right->type) {
593 if ((right->data.type != SDB_TYPE_STRING)
594 && (right->data.type != SDB_TYPE_REGEX))
595 return NULL;
597 if (right->data.type == SDB_TYPE_STRING) {
598 char *raw = right->data.data.string;
599 if (sdb_data_parse(raw, SDB_TYPE_REGEX, &right->data))
600 return NULL;
601 free(raw);
602 }
603 }
604 return M(sdb_object_create("regex-matcher", cmp_type,
605 MATCHER_REGEX, left, right));
606 } /* sdb_store_regex_matcher */
608 sdb_store_matcher_t *
609 sdb_store_nregex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right)
610 {
611 sdb_store_matcher_t *m = sdb_store_regex_matcher(left, right);
612 if (! m)
613 return NULL;
614 m->type = MATCHER_NREGEX;
615 return m;
616 } /* sdb_store_nregex_matcher */
618 sdb_store_matcher_t *
619 sdb_store_isnull_matcher(sdb_store_expr_t *expr)
620 {
621 return M(sdb_object_create("isnull-matcher", isnull_type,
622 MATCHER_ISNULL, expr));
623 } /* sdb_store_isnull_matcher */
625 sdb_store_matcher_t *
626 sdb_store_isnnull_matcher(sdb_store_expr_t *expr)
627 {
628 return M(sdb_object_create("isnull-matcher", isnull_type,
629 MATCHER_ISNNULL, expr));
630 } /* sdb_store_isnnull_matcher */
632 sdb_store_matcher_op_cb
633 sdb_store_parse_matcher_op(const char *op)
634 {
635 if (! strcasecmp(op, "<"))
636 return sdb_store_lt_matcher;
637 else if (! strcasecmp(op, "<="))
638 return sdb_store_le_matcher;
639 else if (! strcasecmp(op, "="))
640 return sdb_store_eq_matcher;
641 else if (! strcasecmp(op, "!="))
642 return sdb_store_ne_matcher;
643 else if (! strcasecmp(op, ">="))
644 return sdb_store_ge_matcher;
645 else if (! strcasecmp(op, ">"))
646 return sdb_store_gt_matcher;
647 else if (! strcasecmp(op, "=~"))
648 return sdb_store_regex_matcher;
649 else if (! strcasecmp(op, "!~"))
650 return sdb_store_nregex_matcher;
651 return NULL;
652 } /* sdb_store_parse_matcher_op */
654 int
655 sdb_store_parse_object_type(const char *name)
656 {
657 if (! strcasecmp(name, "host"))
658 return SDB_HOST;
659 else if (! strcasecmp(name, "service"))
660 return SDB_SERVICE;
661 else if (! strcasecmp(name, "metric"))
662 return SDB_METRIC;
663 else if (! strcasecmp(name, "attribute"))
664 return SDB_ATTRIBUTE;
665 return -1;
666 } /* sdb_store_parse_object_type */
668 int
669 sdb_store_parse_object_type_plural(const char *name)
670 {
671 if (! strcasecmp(name, "hosts"))
672 return SDB_HOST;
673 else if (! strcasecmp(name, "services"))
674 return SDB_SERVICE;
675 else if (! strcasecmp(name, "metrics"))
676 return SDB_METRIC;
677 else if (! strcasecmp(name, "attributes"))
678 return SDB_ATTRIBUTE;
679 return -1;
680 } /* sdb_store_parse_object_type_plural */
682 int
683 sdb_store_parse_field_name(const char *name)
684 {
685 if (! strcasecmp(name, "name"))
686 return SDB_FIELD_NAME;
687 else if (! strcasecmp(name, "last_update"))
688 return SDB_FIELD_LAST_UPDATE;
689 else if (! strcasecmp(name, "age"))
690 return SDB_FIELD_AGE;
691 else if (! strcasecmp(name, "interval"))
692 return SDB_FIELD_INTERVAL;
693 else if (! strcasecmp(name, "backend"))
694 return SDB_FIELD_BACKEND;
695 return -1;
696 } /* sdb_store_parse_field_name */
698 sdb_store_matcher_t *
699 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
700 {
701 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
702 left, right));
703 } /* sdb_store_dis_matcher */
705 sdb_store_matcher_t *
706 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
707 {
708 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
709 left, right));
710 } /* sdb_store_con_matcher */
712 sdb_store_matcher_t *
713 sdb_store_inv_matcher(sdb_store_matcher_t *m)
714 {
715 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
716 } /* sdb_store_inv_matcher */
718 int
719 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
720 sdb_store_matcher_t *filter)
721 {
722 if (filter && (! sdb_store_matcher_matches(filter, obj, NULL)))
723 return 0;
725 /* "NULL" always matches */
726 if ((! m) || (! obj))
727 return 1;
729 if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
730 return 0;
732 return matchers[m->type](m, obj, filter);
733 } /* sdb_store_matcher_matches */
735 int
736 sdb_store_scan(sdb_store_matcher_t *m, sdb_store_matcher_t *filter,
737 sdb_store_lookup_cb cb, void *user_data)
738 {
739 scan_iter_data_t data = { m, filter, cb, user_data };
741 if (! cb)
742 return -1;
743 return sdb_store_iterate(scan_iter, &data);
744 } /* sdb_store_scan */
746 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */