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_host_t *host, 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 (sdb_store_expr_eval(ATTR_C(cond)->expr, &value))
115 return INT_MAX;
117 attr = attr_get(host, ATTR_C(cond)->name, filter);
118 if (! attr)
119 status = INT_MAX;
120 else if (attr->value.type != value.type)
121 status = INT_MAX;
122 else
123 status = sdb_data_cmp(&attr->value, &value);
124 sdb_data_free_datum(&value);
125 return status;
126 } /* attr_cmp */
128 /*
129 * matcher implementations
130 */
132 static int
133 match_string(string_matcher_t *m, const char *name)
134 {
135 if ((! m->name) && (! m->name_re))
136 return 1;
138 if (! name)
139 name = "";
141 if (m->name && strcasecmp(m->name, name))
142 return 0;
143 if (m->name_re && regexec(m->name_re, name,
144 /* matches */ 0, NULL, /* flags = */ 0))
145 return 0;
146 return 1;
147 } /* match_string */
149 static int
150 match_logical(sdb_store_matcher_t *m, sdb_host_t *host,
151 sdb_store_matcher_t *filter)
152 {
153 int status;
155 assert((m->type == MATCHER_AND) || (m->type == MATCHER_OR));
156 assert(OP_M(m)->left && OP_M(m)->right);
158 status = sdb_store_matcher_matches(OP_M(m)->left, STORE_OBJ(host),
159 filter);
161 /* lazy evaluation */
162 if ((! status) && (m->type == MATCHER_AND))
163 return status;
164 else if (status && (m->type == MATCHER_OR))
165 return status;
167 return sdb_store_matcher_matches(OP_M(m)->right, STORE_OBJ(host), filter);
168 } /* match_logical */
170 static int
171 match_unary(sdb_store_matcher_t *m, sdb_host_t *host,
172 sdb_store_matcher_t *filter)
173 {
174 assert(m->type == MATCHER_NOT);
175 assert(UOP_M(m)->op);
177 return !sdb_store_matcher_matches(UOP_M(m)->op, STORE_OBJ(host), filter);
178 } /* match_unary */
180 static int
181 match_name(sdb_store_matcher_t *m, sdb_host_t *host,
182 sdb_store_matcher_t *filter)
183 {
184 sdb_avltree_iter_t *iter = NULL;
185 int status = 0;
187 assert(m->type == MATCHER_NAME);
189 switch (NAME_M(m)->obj_type) {
190 case SDB_HOST:
191 return match_string(&NAME_M(m)->name, SDB_OBJ(host)->name);
192 break;
193 case SDB_SERVICE:
194 iter = sdb_avltree_get_iter(host->services);
195 break;
196 case SDB_ATTRIBUTE:
197 iter = sdb_avltree_get_iter(host->attributes);
198 break;
199 }
201 while (sdb_avltree_iter_has_next(iter)) {
202 sdb_object_t *child = sdb_avltree_iter_get_next(iter);
203 if (filter && (! sdb_store_matcher_matches(filter, STORE_OBJ(child),
204 NULL)))
205 continue;
206 if (match_string(&NAME_M(m)->name, child->name)) {
207 status = 1;
208 break;
209 }
210 }
211 sdb_avltree_iter_destroy(iter);
212 return status;
213 } /* match_name */
215 static int
216 match_attr(sdb_store_matcher_t *m, sdb_host_t *host,
217 sdb_store_matcher_t *filter)
218 {
219 sdb_attribute_t *attr;
221 assert(m->type == MATCHER_ATTR);
222 assert(ATTR_M(m)->name);
224 attr = attr_get(host, ATTR_M(m)->name, filter);
225 if (attr) {
226 char buf[sdb_data_strlen(&attr->value) + 1];
227 if (sdb_data_format(&attr->value, buf, sizeof(buf), SDB_UNQUOTED) <= 0)
228 return 0;
229 if (match_string(&ATTR_M(m)->value, buf))
230 return 1;
231 }
232 return 0;
233 } /* match_attr */
235 static int
236 match_lt(sdb_store_matcher_t *m, sdb_host_t *host,
237 sdb_store_matcher_t *filter)
238 {
239 int status;
240 assert(m->type == MATCHER_LT);
241 status = COND_M(m)->cond->cmp(host, COND_M(m)->cond, filter);
242 return (status != INT_MAX) && (status < 0);
243 } /* match_lt */
245 static int
246 match_le(sdb_store_matcher_t *m, sdb_host_t *host,
247 sdb_store_matcher_t *filter)
248 {
249 int status;
250 assert(m->type == MATCHER_LE);
251 status = COND_M(m)->cond->cmp(host, COND_M(m)->cond, filter);
252 return (status != INT_MAX) && (status <= 0);
253 } /* match_le */
255 static int
256 match_eq(sdb_store_matcher_t *m, sdb_host_t *host,
257 sdb_store_matcher_t *filter)
258 {
259 int status;
260 assert(m->type == MATCHER_EQ);
261 status = COND_M(m)->cond->cmp(host, COND_M(m)->cond, filter);
262 return (status != INT_MAX) && (! status);
263 } /* match_eq */
265 static int
266 match_ge(sdb_store_matcher_t *m, sdb_host_t *host,
267 sdb_store_matcher_t *filter)
268 {
269 int status;
270 assert(m->type == MATCHER_GE);
271 status = COND_M(m)->cond->cmp(host, COND_M(m)->cond, filter);
272 return (status != INT_MAX) && (status >= 0);
273 } /* match_ge */
275 static int
276 match_gt(sdb_store_matcher_t *m, sdb_host_t *host,
277 sdb_store_matcher_t *filter)
278 {
279 int status;
280 assert(m->type == MATCHER_GT);
281 status = COND_M(m)->cond->cmp(host, COND_M(m)->cond, filter);
282 return (status != INT_MAX) && (status > 0);
283 } /* match_gt */
285 static int
286 match_isnull(sdb_store_matcher_t *m, sdb_host_t *host,
287 sdb_store_matcher_t *filter)
288 {
289 assert(m->type == MATCHER_ISNULL);
290 return attr_get(host, ISNULL_M(m)->attr_name, filter) == NULL;
291 } /* match_isnull */
293 typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_host_t *,
294 sdb_store_matcher_t *);
296 /* this array needs to be indexable by the matcher types;
297 * -> update the enum in store-private.h when updating this */
298 static matcher_cb
299 matchers[] = {
300 match_logical,
301 match_logical,
302 match_unary,
303 match_name,
304 match_attr,
305 match_lt,
306 match_le,
307 match_eq,
308 match_ge,
309 match_gt,
310 match_isnull,
311 };
313 /*
314 * private conditional types
315 */
317 static int
318 attr_cond_init(sdb_object_t *obj, va_list ap)
319 {
320 const char *name = va_arg(ap, const char *);
321 sdb_store_expr_t *expr = va_arg(ap, sdb_store_expr_t *);
323 if (! name)
324 return -1;
326 SDB_STORE_COND(obj)->cmp = attr_cmp;
328 ATTR_C(obj)->name = strdup(name);
329 if (! ATTR_C(obj)->name)
330 return -1;
331 ATTR_C(obj)->expr = expr;
332 sdb_object_ref(SDB_OBJ(expr));
333 return 0;
334 } /* attr_cond_init */
336 static void
337 attr_cond_destroy(sdb_object_t *obj)
338 {
339 if (ATTR_C(obj)->name)
340 free(ATTR_C(obj)->name);
341 sdb_object_deref(SDB_OBJ(ATTR_C(obj)->expr));
342 } /* attr_cond_destroy */
344 static sdb_type_t attr_cond_type = {
345 /* size = */ sizeof(attr_cond_t),
346 /* init = */ attr_cond_init,
347 /* destroy = */ attr_cond_destroy,
348 };
350 /*
351 * private matcher types
352 */
354 /* initializes a string matcher consuming two elements from ap */
355 static int
356 string_matcher_init(string_matcher_t *m, va_list ap)
357 {
358 const char *name = va_arg(ap, const char *);
359 const char *name_re = va_arg(ap, const char *);
361 if (name) {
362 m->name = strdup(name);
363 if (! m->name)
364 return -1;
365 }
366 if (name_re) {
367 m->name_re = malloc(sizeof(*m->name_re));
368 if (! m->name_re)
369 return -1;
370 if (regcomp(m->name_re, name_re, REG_EXTENDED | REG_ICASE | REG_NOSUB))
371 return -1;
372 }
373 return 0;
374 } /* string_matcher_init */
376 static void
377 string_matcher_destroy(string_matcher_t *m)
378 {
379 if (m->name)
380 free(m->name);
381 if (m->name_re) {
382 regfree(m->name_re);
383 free(m->name_re);
384 }
385 } /* string_matcher_destroy */
387 static char *
388 string_tostring(string_matcher_t *m, char *buf, size_t buflen)
389 {
390 snprintf(buf, buflen, "{ %s%s%s, %p }",
391 m->name ? "'" : "", m->name ? m->name : "NULL", m->name ? "'" : "",
392 m->name_re);
393 return buf;
394 } /* string_tostring */
396 /* initializes a name matcher */
397 static int
398 name_matcher_init(sdb_object_t *obj, va_list ap)
399 {
400 name_matcher_t *m = NAME_M(obj);
401 M(obj)->type = MATCHER_NAME;
402 return string_matcher_init(&m->name, ap);
403 } /* name_matcher_init */
405 static void
406 name_matcher_destroy(sdb_object_t *obj)
407 {
408 name_matcher_t *m = NAME_M(obj);
409 string_matcher_destroy(&m->name);
410 } /* name_matcher_destroy */
412 static char *
413 name_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
414 {
415 char name[buflen + 1];
416 assert(m->type == MATCHER_NAME);
417 snprintf(buf, buflen, "OBJ[%s]{ NAME%s }",
418 SDB_STORE_TYPE_TO_NAME(NAME_M(m)->obj_type),
419 string_tostring(&NAME_M(m)->name, name, sizeof(name)));
420 return buf;
421 } /* name_tostring */
423 static int
424 attr_matcher_init(sdb_object_t *obj, va_list ap)
425 {
426 attr_matcher_t *attr = ATTR_M(obj);
427 const char *name = va_arg(ap, const char *);
429 M(obj)->type = MATCHER_ATTR;
430 if (name) {
431 attr->name = strdup(name);
432 if (! attr->name)
433 return -1;
434 }
435 return string_matcher_init(&attr->value, ap);
436 } /* attr_matcher_init */
438 static void
439 attr_matcher_destroy(sdb_object_t *obj)
440 {
441 attr_matcher_t *attr = ATTR_M(obj);
442 if (attr->name)
443 free(attr->name);
444 attr->name = NULL;
445 string_matcher_destroy(&attr->value);
446 } /* attr_matcher_destroy */
448 static char *
449 attr_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
450 {
451 char value[buflen + 1];
453 if (! m) {
454 snprintf(buf, buflen, "ATTR{}");
455 return buf;
456 }
458 assert(m->type == MATCHER_ATTR);
459 snprintf(buf, buflen, "ATTR[%s]{ VALUE%s }", ATTR_M(m)->name,
460 string_tostring(&ATTR_M(m)->value, value, sizeof(value)));
461 return buf;
462 } /* attr_tostring */
464 static int
465 cond_matcher_init(sdb_object_t *obj, va_list ap)
466 {
467 int type = va_arg(ap, int);
468 sdb_store_cond_t *cond = va_arg(ap, sdb_store_cond_t *);
470 if (! cond)
471 return -1;
473 sdb_object_ref(SDB_OBJ(cond));
475 M(obj)->type = type;
476 COND_M(obj)->cond = cond;
477 return 0;
478 } /* cond_matcher_init */
480 static void
481 cond_matcher_destroy(sdb_object_t *obj)
482 {
483 sdb_object_deref(SDB_OBJ(COND_M(obj)->cond));
484 } /* cond_matcher_destroy */
486 static char *
487 cond_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
488 {
489 if (COND_M(m)->cond->cmp == attr_cmp) {
490 sdb_data_t value = SDB_DATA_INIT;
491 char value_str[buflen];
492 if (sdb_store_expr_eval(ATTR_C(COND_M(m)->cond)->expr, &value))
493 snprintf(value_str, sizeof(value_str), "ERR");
494 else if (sdb_data_format(&value, value_str, sizeof(value_str),
495 SDB_SINGLE_QUOTED) < 0)
496 snprintf(value_str, sizeof(value_str), "ERR");
497 snprintf(buf, buflen, "ATTR[%s]{ %s %s }",
498 ATTR_C(COND_M(m)->cond)->name, MATCHER_SYM(m->type),
499 value_str);
500 sdb_data_free_datum(&value);
501 }
502 return buf;
503 } /* cond_tostring */
505 static int
506 op_matcher_init(sdb_object_t *obj, va_list ap)
507 {
508 M(obj)->type = va_arg(ap, int);
509 if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
510 return -1;
512 OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
513 sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
514 OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
515 sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
517 if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
518 return -1;
519 return 0;
520 } /* op_matcher_init */
522 static void
523 op_matcher_destroy(sdb_object_t *obj)
524 {
525 if (OP_M(obj)->left)
526 sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
527 if (OP_M(obj)->right)
528 sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
529 } /* op_matcher_destroy */
531 static char *
532 op_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
533 {
534 char left[buflen + 1], right[buflen + 1];
536 if (! m) {
537 /* this should not happen */
538 snprintf(buf, buflen, "()");
539 return buf;
540 }
542 assert((m->type == MATCHER_OR) || (m->type == MATCHER_AND));
543 snprintf(buf, buflen, "(%s, %s, %s)",
544 m->type == MATCHER_OR ? "OR" : "AND",
545 sdb_store_matcher_tostring(OP_M(m)->left, left, sizeof(left)),
546 sdb_store_matcher_tostring(OP_M(m)->right, right, sizeof(right)));
547 return buf;
548 } /* op_tostring */
550 static int
551 uop_matcher_init(sdb_object_t *obj, va_list ap)
552 {
553 M(obj)->type = va_arg(ap, int);
554 if (M(obj)->type != MATCHER_NOT)
555 return -1;
557 UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
558 sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
560 if (! UOP_M(obj)->op)
561 return -1;
562 return 0;
563 } /* uop_matcher_init */
565 static void
566 uop_matcher_destroy(sdb_object_t *obj)
567 {
568 if (UOP_M(obj)->op)
569 sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
570 } /* uop_matcher_destroy */
572 static char *
573 uop_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
574 {
575 char op[buflen + 1];
577 if (! m) {
578 /* this should not happen */
579 snprintf(buf, buflen, "()");
580 return buf;
581 }
583 assert(m->type == MATCHER_NOT);
584 snprintf(buf, buflen, "(NOT, %s)",
585 sdb_store_matcher_tostring(UOP_M(m)->op, op, sizeof(op)));
586 return buf;
587 } /* uop_tostring */
589 static int
590 isnull_matcher_init(sdb_object_t *obj, va_list ap)
591 {
592 const char *name;
594 M(obj)->type = va_arg(ap, int);
595 if (M(obj)->type != MATCHER_ISNULL)
596 return -1;
598 name = va_arg(ap, const char *);
599 if (! name)
600 return -1;
601 ISNULL_M(obj)->attr_name = strdup(name);
602 if (! ISNULL_M(obj)->attr_name)
603 return -1;
604 return 0;
605 } /* isnull_matcher_init */
607 static void
608 isnull_matcher_destroy(sdb_object_t *obj)
609 {
610 if (ISNULL_M(obj)->attr_name)
611 free(ISNULL_M(obj)->attr_name);
612 ISNULL_M(obj)->attr_name = NULL;
613 } /* isnull_matcher_destroy */
615 static char *
616 isnull_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
617 {
618 snprintf(buf, buflen, "(IS NULL, ATTR[%s])", ISNULL_M(m)->attr_name);
619 return buf;
620 } /* isnull_tostring */
622 static sdb_type_t name_type = {
623 /* size = */ sizeof(name_matcher_t),
624 /* init = */ name_matcher_init,
625 /* destroy = */ name_matcher_destroy,
626 };
628 static sdb_type_t attr_type = {
629 /* size = */ sizeof(attr_matcher_t),
630 /* init = */ attr_matcher_init,
631 /* destroy = */ attr_matcher_destroy,
632 };
634 static sdb_type_t cond_type = {
635 /* size = */ sizeof(cond_matcher_t),
636 /* init = */ cond_matcher_init,
637 /* destroy = */ cond_matcher_destroy,
638 };
640 static sdb_type_t op_type = {
641 /* size = */ sizeof(op_matcher_t),
642 /* init = */ op_matcher_init,
643 /* destroy = */ op_matcher_destroy,
644 };
646 static sdb_type_t uop_type = {
647 /* size = */ sizeof(uop_matcher_t),
648 /* init = */ uop_matcher_init,
649 /* destroy = */ uop_matcher_destroy,
650 };
652 static sdb_type_t isnull_type = {
653 /* size = */ sizeof(isnull_matcher_t),
654 /* init = */ isnull_matcher_init,
655 /* destroy = */ isnull_matcher_destroy,
656 };
658 typedef char *(*matcher_tostring_cb)(sdb_store_matcher_t *, char *, size_t);
660 /* this array needs to be indexable by the matcher types;
661 * -> update the enum in store-private.h when updating this */
662 static matcher_tostring_cb
663 matchers_tostring[] = {
664 op_tostring,
665 op_tostring,
666 uop_tostring,
667 name_tostring,
668 attr_tostring,
669 cond_tostring,
670 cond_tostring,
671 cond_tostring,
672 cond_tostring,
673 cond_tostring,
674 isnull_tostring,
675 };
677 /*
678 * public API
679 */
681 sdb_store_cond_t *
682 sdb_store_attr_cond(const char *name, sdb_store_expr_t *expr)
683 {
684 return SDB_STORE_COND(sdb_object_create("attr-cond", attr_cond_type,
685 name, expr));
686 } /* sdb_store_attr_cond */
688 sdb_store_matcher_t *
689 sdb_store_name_matcher(int type, const char *name, _Bool re)
690 {
691 sdb_store_matcher_t *m;
693 if (re)
694 m = M(sdb_object_create("name-matcher", name_type, NULL, name));
695 else
696 m = M(sdb_object_create("name-matcher", name_type, name, NULL));
698 if (! m)
699 return NULL;
701 NAME_M(m)->obj_type = type;
702 return m;
703 } /* sdb_store_name_matcher */
705 sdb_store_matcher_t *
706 sdb_store_attr_matcher(const char *name, const char *value, _Bool re)
707 {
708 sdb_store_matcher_t *m;
710 if (! name)
711 return NULL;
713 if (re)
714 m = M(sdb_object_create("attr-matcher", attr_type,
715 name, NULL, value));
716 else
717 m = M(sdb_object_create("attr-matcher", attr_type,
718 name, value, NULL));
719 return m;
720 } /* sdb_store_attr_matcher */
722 sdb_store_matcher_t *
723 sdb_store_lt_matcher(sdb_store_cond_t *cond)
724 {
725 return M(sdb_object_create("lt-matcher", cond_type,
726 MATCHER_LT, cond));
727 } /* sdb_store_lt_matcher */
729 sdb_store_matcher_t *
730 sdb_store_le_matcher(sdb_store_cond_t *cond)
731 {
732 return M(sdb_object_create("le-matcher", cond_type,
733 MATCHER_LE, cond));
734 } /* sdb_store_le_matcher */
736 sdb_store_matcher_t *
737 sdb_store_eq_matcher(sdb_store_cond_t *cond)
738 {
739 return M(sdb_object_create("eq-matcher", cond_type,
740 MATCHER_EQ, cond));
741 } /* sdb_store_eq_matcher */
743 sdb_store_matcher_t *
744 sdb_store_ge_matcher(sdb_store_cond_t *cond)
745 {
746 return M(sdb_object_create("ge-matcher", cond_type,
747 MATCHER_GE, cond));
748 } /* sdb_store_ge_matcher */
750 sdb_store_matcher_t *
751 sdb_store_gt_matcher(sdb_store_cond_t *cond)
752 {
753 return M(sdb_object_create("gt-matcher", cond_type,
754 MATCHER_GT, cond));
755 } /* sdb_store_gt_matcher */
757 sdb_store_matcher_t *
758 sdb_store_isnull_matcher(const char *attr_name)
759 {
760 return M(sdb_object_create("isnull-matcher", isnull_type,
761 MATCHER_ISNULL, attr_name));
762 } /* sdb_store_isnull_matcher */
764 static sdb_store_matcher_t *
765 parse_attr_cmp(const char *attr, const char *op, sdb_store_expr_t *expr)
766 {
767 sdb_store_matcher_t *(*matcher)(sdb_store_cond_t *) = NULL;
768 sdb_store_matcher_t *m;
769 sdb_store_cond_t *cond;
770 _Bool inv = 0;
772 if (! attr)
773 return NULL;
775 if (! strcasecmp(op, "IS")) {
776 if (! expr)
777 return sdb_store_isnull_matcher(attr);
778 else
779 return NULL;
780 }
781 else if (! expr)
782 return NULL;
783 else if (! strcasecmp(op, "<"))
784 matcher = sdb_store_lt_matcher;
785 else if (! strcasecmp(op, "<="))
786 matcher = sdb_store_le_matcher;
787 else if (! strcasecmp(op, "="))
788 matcher = sdb_store_eq_matcher;
789 else if (! strcasecmp(op, ">="))
790 matcher = sdb_store_ge_matcher;
791 else if (! strcasecmp(op, ">"))
792 matcher = sdb_store_gt_matcher;
793 else if (! strcasecmp(op, "!=")) {
794 matcher = sdb_store_eq_matcher;
795 inv = 1;
796 }
797 else
798 return NULL;
800 cond = sdb_store_attr_cond(attr, expr);
801 if (! cond)
802 return NULL;
804 m = matcher(cond);
805 /* pass ownership to 'm' or destroy in case of an error */
806 sdb_object_deref(SDB_OBJ(cond));
807 if (! m)
808 return NULL;
810 if (inv) {
811 sdb_store_matcher_t *tmp;
812 tmp = sdb_store_inv_matcher(m);
813 /* pass ownership to the inverse matcher */
814 sdb_object_deref(SDB_OBJ(m));
815 m = tmp;
816 }
817 return m;
818 } /* parse_attr_cmp */
820 sdb_store_matcher_t *
821 sdb_store_matcher_parse_cmp(const char *obj_type, const char *attr,
822 const char *op, sdb_store_expr_t *expr)
823 {
824 int type = -1;
825 _Bool inv = 0;
826 _Bool re = 0;
828 sdb_data_t value = SDB_DATA_INIT;
829 sdb_store_matcher_t *m = NULL;
831 if (! strcasecmp(obj_type, "host"))
832 type = SDB_HOST;
833 else if (! strcasecmp(obj_type, "service"))
834 type = SDB_SERVICE;
835 else if (! strcasecmp(obj_type, "attribute"))
836 type = SDB_ATTRIBUTE;
837 else
838 return NULL;
840 /* XXX: this code sucks! */
841 if (! strcasecmp(op, "=")) {
842 /* nothing to do */
843 }
844 else if (! strcasecmp(op, "!=")) {
845 inv = 1;
846 }
847 else if (! strcasecmp(op, "=~")) {
848 re = 1;
849 }
850 else if (! strcasecmp(op, "!~")) {
851 inv = 1;
852 re = 1;
853 }
854 else if (type == SDB_ATTRIBUTE)
855 return parse_attr_cmp(attr, op, expr);
856 else
857 return NULL;
859 if (! expr)
860 return NULL;
862 if (sdb_store_expr_eval(expr, &value))
863 return NULL;
864 if (value.type != SDB_TYPE_STRING) {
865 sdb_data_free_datum(&value);
866 return parse_attr_cmp(attr, op, expr);
867 }
869 if (! attr)
870 m = sdb_store_name_matcher(type, value.data.string, re);
871 else if (type == SDB_ATTRIBUTE)
872 m = sdb_store_attr_matcher(attr, value.data.string, re);
874 sdb_data_free_datum(&value);
876 if (! m)
877 return NULL;
879 if (inv) {
880 sdb_store_matcher_t *tmp;
881 tmp = sdb_store_inv_matcher(m);
882 /* pass ownership to the inverse matcher */
883 sdb_object_deref(SDB_OBJ(m));
884 m = tmp;
885 }
886 return m;
887 } /* sdb_store_matcher_parse_cmp */
889 sdb_store_matcher_t *
890 sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
891 {
892 return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
893 left, right));
894 } /* sdb_store_dis_matcher */
896 sdb_store_matcher_t *
897 sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
898 {
899 return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
900 left, right));
901 } /* sdb_store_con_matcher */
903 sdb_store_matcher_t *
904 sdb_store_inv_matcher(sdb_store_matcher_t *m)
905 {
906 return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
907 } /* sdb_store_inv_matcher */
909 int
910 sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
911 sdb_store_matcher_t *filter)
912 {
913 if (obj->type != SDB_HOST)
914 return 0;
916 if (filter && (! sdb_store_matcher_matches(filter, obj, NULL)))
917 return 0;
919 /* "NULL" always matches */
920 if ((! m) || (! obj))
921 return 1;
923 if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
924 return 0;
926 return matchers[m->type](m, HOST(obj), filter);
927 } /* sdb_store_matcher_matches */
929 char *
930 sdb_store_matcher_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
931 {
932 if (! m)
933 return NULL;
935 if ((m->type < 0)
936 || (((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers_tostring))))
937 return NULL;
938 return matchers_tostring[m->type](m, buf, buflen);
939 } /* sdb_store_matcher_tostring */
941 int
942 sdb_store_scan(sdb_store_matcher_t *m, sdb_store_matcher_t *filter,
943 sdb_store_lookup_cb cb, void *user_data)
944 {
945 scan_iter_data_t data = { m, filter, cb, user_data };
947 if (! cb)
948 return -1;
949 return sdb_store_iterate(scan_iter, &data);
950 } /* sdb_store_scan */
952 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */