4840736896f55a03b4cf0716e18e3dec7cb9baec
1 /*
2 * SysDB - src/core/data.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 #if HAVE_CONFIG_H
29 # include "config.h"
30 #endif /* HAVE_CONFIG_H */
32 #include "sysdb.h"
34 #include "core/data.h"
35 #include "utils/error.h"
37 #include <errno.h>
39 #include <inttypes.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
45 #include <math.h>
47 /*
48 * private helper functions
49 */
51 /* Calculate the linear function 'd1 + n * d2'. */
52 static int
53 data_lin(const sdb_data_t *d1, int n, const sdb_data_t *d2, sdb_data_t *res)
54 {
55 if (d1->type != d2->type)
56 return -1;
58 if (d1->type == SDB_TYPE_INTEGER)
59 res->data.integer = d1->data.integer + (int64_t)n * d2->data.integer;
60 else if (d1->type == SDB_TYPE_DECIMAL)
61 res->data.decimal = d1->data.decimal + (double)n * d2->data.decimal;
62 else if (d1->type == SDB_TYPE_DATETIME)
63 res->data.datetime = d1->data.datetime + (sdb_time_t)n * d2->data.datetime;
64 else
65 return -1;
66 res->type = d1->type;
67 return 0;
68 } /* data_lin */
70 /* Multiply d1 with d2. */
71 static int
72 data_mul(const sdb_data_t *d1, const sdb_data_t *d2, sdb_data_t *res)
73 {
74 if (d1->type == SDB_TYPE_INTEGER) {
75 if (d2->type == SDB_TYPE_INTEGER)
76 res->data.integer = d1->data.integer * d2->data.integer;
77 else if (d2->type == SDB_TYPE_DATETIME) {
78 res->data.datetime = (sdb_time_t)d1->data.integer
79 * d2->data.datetime;
80 res->type = SDB_TYPE_DATETIME;
81 return 0;
82 }
83 else
84 return -1;
85 }
86 else if (d1->type == SDB_TYPE_DECIMAL) {
87 if (d2->type == SDB_TYPE_DECIMAL)
88 res->data.decimal = d1->data.decimal * d2->data.decimal;
89 else if (d2->type == SDB_TYPE_DATETIME) {
90 res->data.datetime = (sdb_time_t)(d1->data.decimal
91 * (double)d2->data.datetime);
92 res->type = SDB_TYPE_DATETIME;
93 return 0;
94 }
95 else
96 return -1;
97 }
98 else if (d1->type == SDB_TYPE_DATETIME) {
99 if (d2->type == SDB_TYPE_DATETIME)
100 res->data.datetime = d1->data.datetime
101 * d2->data.datetime;
102 else if (d2->type == SDB_TYPE_INTEGER)
103 res->data.datetime = d1->data.datetime
104 * (sdb_time_t)d2->data.integer;
105 else if (d2->type == SDB_TYPE_DECIMAL)
106 res->data.datetime = (sdb_time_t)((double)d1->data.datetime
107 * d2->data.decimal);
108 else
109 return -1;
110 }
111 else
112 return -1;
114 res->type = d1->type;
115 return 0;
116 } /* data_mul */
118 /* Device d1 by d2 and return the result and the remainder. */
119 static int
120 data_div(const sdb_data_t *d1, const sdb_data_t *d2,
121 sdb_data_t *res, sdb_data_t *rem)
122 {
123 if (d1->type == SDB_TYPE_INTEGER) {
124 if (d2->type != SDB_TYPE_INTEGER)
125 return -1;
126 if (res)
127 res->data.integer = d1->data.integer / d2->data.integer;
128 if (rem)
129 rem->data.integer = d1->data.integer % d2->data.integer;
130 }
131 else if (d1->type == SDB_TYPE_DECIMAL) {
132 if (d2->type != SDB_TYPE_DECIMAL)
133 return -1;
134 if (res)
135 res->data.decimal = d1->data.decimal / d2->data.decimal;
136 if (rem)
137 rem->data.decimal = fmod(d1->data.decimal, d2->data.decimal);
138 }
139 else if (d1->type == SDB_TYPE_DATETIME) {
140 if (d2->type == SDB_TYPE_DECIMAL) {
141 if (res)
142 res->data.datetime = (sdb_time_t)((double)d1->data.datetime
143 / d2->data.decimal);
144 if (rem) {
145 double tmp = fmod((double)d1->data.datetime, d2->data.decimal);
146 rem->data.datetime = (sdb_time_t)tmp;
147 }
148 }
149 else {
150 sdb_time_t a, b;
151 if (d2->type == SDB_TYPE_DATETIME) {
152 a = d1->data.datetime;
153 b = d2->data.datetime;
154 }
155 else if (d2->type == SDB_TYPE_INTEGER) {
156 a = d1->data.datetime;
157 b = (sdb_time_t)d2->data.integer;
158 }
159 else
160 return -1;
161 if (res)
162 res->data.datetime = a / b;
163 if (rem)
164 rem->data.datetime = a % b;
165 }
166 }
167 else
168 return -1;
170 if (res)
171 res->type = d1->type;
172 if (rem)
173 rem->type = d1->type;
174 return 0;
175 } /* data_div */
177 /* Concatenate d1 and d2. */
178 static int
179 data_concat(const sdb_data_t *d1, const sdb_data_t *d2, sdb_data_t *res)
180 {
181 unsigned char *new;
182 unsigned char *s1, *s2;
183 size_t len1, len2;
185 if (d1->type != d2->type)
186 return -1;
188 if (d1->type == SDB_TYPE_STRING) {
189 s1 = (unsigned char *)d1->data.string;
190 s2 = (unsigned char *)d2->data.string;
191 len1 = s1 ? strlen((char *)s1) : 0;
192 len2 = s2 ? strlen((char *)s2) : 0;
193 }
194 else if (d1->type == SDB_TYPE_BINARY) {
195 s1 = d1->data.binary.datum;
196 s2 = d2->data.binary.datum;
197 len1 = d1->data.binary.length;
198 len2 = d2->data.binary.length;
199 }
200 else
201 return -1;
203 if (s1 && s2) {
204 new = malloc(len1 + len2 + 1);
205 if (! new)
206 return -1;
208 if (len1)
209 memcpy(new, s1, len1);
210 if (len2)
211 memcpy(new + len1, s2, len2);
212 new[len1 + len2] = '\0';
213 }
214 else {
215 len1 = len2 = 0;
216 new = NULL;
217 }
219 res->type = d1->type;
220 if (res->type == SDB_TYPE_STRING) {
221 res->data.string = (char *)new;
222 }
223 else {
224 res->data.binary.datum = new;
225 res->data.binary.length = len1 + len2;
226 }
227 return 0;
228 } /* data_concat */
230 /*
231 * public API
232 */
234 int
235 sdb_data_copy(sdb_data_t *dst, const sdb_data_t *src)
236 {
237 sdb_data_t tmp;
239 if ((! dst) || (! src))
240 return -1;
242 tmp = *src;
243 switch (src->type) {
244 case SDB_TYPE_STRING:
245 if (src->data.string) {
246 tmp.data.string = strdup(src->data.string);
247 if (! tmp.data.string)
248 return -1;
249 }
250 break;
251 case SDB_TYPE_BINARY:
252 if (src->data.binary.datum) {
253 tmp.data.binary.datum = malloc(src->data.binary.length);
254 if (! tmp.data.binary.datum)
255 return -1;
256 memcpy(tmp.data.binary.datum, src->data.binary.datum,
257 src->data.binary.length);
258 }
259 break;
260 case SDB_TYPE_REGEX:
261 if (src->data.re.raw) {
262 tmp.data.re.raw = strdup(src->data.re.raw);
263 if (! tmp.data.re.raw)
264 return -1;
265 /* we need to recompile because the regex might point to
266 * dynamically allocated memory */
267 if (regcomp(&tmp.data.re.regex, tmp.data.re.raw,
268 REG_EXTENDED | REG_ICASE | REG_NOSUB)) {
269 free(tmp.data.re.raw);
270 return -1;
271 }
272 }
273 else
274 memset(&tmp.data.re.regex, 0, sizeof(tmp.data.re.regex));
275 break;
276 }
278 sdb_data_free_datum(dst);
279 *dst = tmp;
280 return 0;
281 } /* sdb_data_copy */
283 void
284 sdb_data_free_datum(sdb_data_t *datum)
285 {
286 if (! datum)
287 return;
289 switch (datum->type) {
290 case SDB_TYPE_STRING:
291 if (datum->data.string)
292 free(datum->data.string);
293 datum->data.string = NULL;
294 break;
295 case SDB_TYPE_BINARY:
296 if (datum->data.binary.datum)
297 free(datum->data.binary.datum);
298 datum->data.binary.datum = NULL;
299 datum->data.binary.length = 0;
300 break;
301 case SDB_TYPE_REGEX:
302 if (datum->data.re.raw) {
303 free(datum->data.re.raw);
304 regfree(&datum->data.re.regex);
305 }
306 datum->data.re.raw = NULL;
307 memset(&datum->data.re.regex, 0, sizeof(datum->data.re.regex));
308 break;
309 }
310 } /* sdb_data_free_datum */
312 int
313 sdb_data_cmp(const sdb_data_t *d1, const sdb_data_t *d2)
314 {
315 #define CMP_NULL(a, b) \
316 do { \
317 if (!(a) && !(b)) return 0; \
318 if (!(a)) return -1; \
319 if (!(b)) return 1; \
320 } while (0)
322 CMP_NULL(d1, d2);
324 if (d1->type != d2->type)
325 return SDB_CMP(d1->type, d2->type);
327 switch (d1->type) {
328 case SDB_TYPE_INTEGER:
329 return SDB_CMP(d1->data.integer, d2->data.integer);
330 case SDB_TYPE_DECIMAL:
331 return SDB_CMP(d1->data.decimal, d2->data.decimal);
332 case SDB_TYPE_STRING:
333 CMP_NULL(d1->data.string, d2->data.string);
334 return strcasecmp(d1->data.string, d2->data.string);
335 case SDB_TYPE_DATETIME:
336 return SDB_CMP(d1->data.datetime, d2->data.datetime);
337 case SDB_TYPE_BINARY:
338 {
339 int diff;
341 CMP_NULL(d1->data.binary.datum, d2->data.binary.datum);
343 /* on a common prefix, the shorter datum sorts less */
344 if (d1->data.binary.length < d2->data.binary.length) {
345 diff = memcmp(d1->data.binary.datum, d2->data.binary.datum,
346 d1->data.binary.length);
347 diff = diff ? diff : -1;
348 }
349 else if (d1->data.binary.length > d2->data.binary.length) {
350 diff = memcmp(d1->data.binary.datum, d2->data.binary.datum,
351 d2->data.binary.length);
352 diff = diff ? diff : 1;
353 }
354 else
355 diff = memcmp(d1->data.binary.datum, d2->data.binary.datum,
356 d1->data.binary.length);
358 return diff;
359 }
360 case SDB_TYPE_REGEX:
361 CMP_NULL(d1->data.re.raw, d2->data.re.raw);
362 return strcmp(d1->data.re.raw, d2->data.re.raw);
363 }
364 return -1;
365 } /* sdb_data_cmp */
367 int
368 sdb_data_strcmp(const sdb_data_t *d1, const sdb_data_t *d2)
369 {
370 char d1_str[sdb_data_strlen(d1) + 1];
371 char d2_str[sdb_data_strlen(d2) + 1];
373 if (sdb_data_isnull(d1))
374 d1 = NULL;
375 if (sdb_data_isnull(d2))
376 d2 = NULL;
378 CMP_NULL(d1, d2);
380 if (sdb_data_format(d1, d1_str, sizeof(d1_str), SDB_UNQUOTED) < 0)
381 return SDB_CMP(sizeof(d1_str), sizeof(d2_str));
382 if (sdb_data_format(d2, d2_str, sizeof(d2_str), SDB_UNQUOTED) < 0)
383 return SDB_CMP(sizeof(d1_str), sizeof(d2_str));
385 return strcasecmp(d1_str, d2_str);
386 #undef CMP_NULL
387 } /* sdb_data_strcmp */
389 _Bool
390 sdb_data_isnull(const sdb_data_t *datum)
391 {
392 if (! datum)
393 return 1;
394 if ((datum->type == SDB_TYPE_STRING) && (! datum->data.string))
395 return 1;
396 if ((datum->type == SDB_TYPE_BINARY) && (! datum->data.binary.datum))
397 return 1;
398 if ((datum->type == SDB_TYPE_REGEX) && (! datum->data.re.raw))
399 return 1;
400 return 0;
401 } /* sdb_data_isnull */
403 int
404 sdb_data_parse_op(const char *op)
405 {
406 if (! strcmp(op, "+"))
407 return SDB_DATA_ADD;
408 else if (! strcmp(op, "-"))
409 return SDB_DATA_SUB;
410 else if (! strcmp(op, "*"))
411 return SDB_DATA_MUL;
412 else if (! strcmp(op, "/"))
413 return SDB_DATA_DIV;
414 else if (! strcmp(op, "%"))
415 return SDB_DATA_MOD;
416 else if (! strcmp(op, "||"))
417 return SDB_DATA_CONCAT;
418 return -1;
419 } /* sdb_data_parse_op */
421 int
422 sdb_data_expr_eval(int op, const sdb_data_t *d1, const sdb_data_t *d2,
423 sdb_data_t *res)
424 {
425 if ((! d1) || (! d2) || (! res))
426 return -1;
427 switch (op) {
428 case SDB_DATA_CONCAT:
429 return data_concat(d1, d2, res);
430 case SDB_DATA_ADD:
431 return data_lin(d1, 1, d2, res);
432 case SDB_DATA_SUB:
433 return data_lin(d1, -1, d2, res);
434 case SDB_DATA_MUL:
435 return data_mul(d1, d2, res);
436 case SDB_DATA_DIV:
437 return data_div(d1, d2, res, NULL);
438 case SDB_DATA_MOD:
439 return data_div(d1, d2, NULL, res);
440 }
441 return -1;
442 } /* sdb_data_expr_eval */
444 size_t
445 sdb_data_strlen(const sdb_data_t *datum)
446 {
447 if (! datum)
448 return 0;
450 switch (datum->type) {
451 case SDB_TYPE_INTEGER:
452 /* log(64) */
453 return 20;
454 case SDB_TYPE_DECIMAL:
455 /* XXX: -d.dddddde+dd or -ddddd.dddddd */
456 return 42;
457 case SDB_TYPE_STRING:
458 if (! datum->data.string)
459 return 8; /* "<NULL>" */
460 /* in the worst case, each character needs to be escaped */
461 return 2 * strlen(datum->data.string) + 2;
462 case SDB_TYPE_DATETIME:
463 /* "YYYY-MM-DD HH:MM:SS +zzzz" */
464 return 27;
465 case SDB_TYPE_BINARY:
466 if (! datum->data.binary.datum)
467 return 8; /* "<NULL>" */
468 /* "\xNN" */
469 return 4 * datum->data.binary.length + 2;
470 case SDB_TYPE_REGEX:
471 if (! datum->data.re.raw)
472 return 8; /* "<NULL>" */
473 /* "/.../" */
474 return strlen(datum->data.re.raw) + 4;
475 }
476 return 0;
477 } /* sdb_data_strlen */
479 int
480 sdb_data_format(const sdb_data_t *datum, char *buf, size_t buflen, int quoted)
481 {
482 char tmp[sdb_data_strlen(datum) + 1];
483 char *data = NULL;
484 int ret = -1;
486 size_t i, pos;
488 if ((! datum) || (! buf))
489 return -1;
491 switch (datum->type) {
492 case SDB_TYPE_INTEGER:
493 ret = snprintf(buf, buflen, "%"PRIi64, datum->data.integer);
494 break;
495 case SDB_TYPE_DECIMAL:
496 ret = snprintf(buf, buflen, "%g", datum->data.decimal);
497 break;
498 case SDB_TYPE_STRING:
499 if (! datum->data.string)
500 data = "<NULL>";
501 else {
502 pos = 0;
503 for (i = 0; i < strlen(datum->data.string); ++i) {
504 char byte = datum->data.string[i];
506 if ((byte == '\\') || (byte == '"')) {
507 tmp[pos] = '\\';
508 ++pos;
509 }
510 tmp[pos] = byte;
511 ++pos;
512 }
513 tmp[pos] = '\0';
514 data = tmp;
515 }
516 break;
517 case SDB_TYPE_DATETIME:
518 if (! sdb_strftime(tmp, sizeof(tmp), "%F %T %z",
519 datum->data.datetime))
520 return -1;
521 tmp[sizeof(tmp) - 1] = '\0';
522 data = tmp;
523 break;
524 case SDB_TYPE_BINARY:
525 pos = 0;
526 for (i = 0; i < datum->data.binary.length; ++i) {
527 int byte = (int)datum->data.binary.datum[i];
528 char hex[] = {'0', '1', '2', '3', '4', '5', '6', '7',
529 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
531 tmp[pos] = '\\';
532 tmp[pos + 1] = 'x';
533 pos += 2;
535 if (byte > 0xf) {
536 tmp[pos] = hex[byte >> 4];
537 ++pos;
538 }
539 tmp[pos] = hex[byte & 0xf];
540 ++pos;
541 }
542 if (datum->data.binary.datum) {
543 tmp[pos] = '\0';
544 data = tmp;
545 }
546 else
547 data = "<NULL>";
548 break;
549 case SDB_TYPE_REGEX:
550 if (! datum->data.re.raw)
551 data = "<NULL>";
552 else {
553 snprintf(tmp, sizeof(tmp), "/%s/", datum->data.re.raw);
554 data = tmp;
555 }
556 break;
557 }
559 if (data) {
560 if (quoted == SDB_UNQUOTED)
561 ret = snprintf(buf, buflen, "%s", data);
562 else if (quoted == SDB_SINGLE_QUOTED)
563 ret = snprintf(buf, buflen, "'%s'", data);
564 else
565 ret = snprintf(buf, buflen, "\"%s\"", data);
566 }
567 buf[buflen - 1] = '\0';
568 return ret;
569 } /* sdb_data_format */
571 int
572 sdb_data_parse(char *str, int type, sdb_data_t *data)
573 {
574 sdb_data_t tmp;
576 char *endptr = NULL;
578 errno = 0;
579 switch (type) {
580 case SDB_TYPE_INTEGER:
581 tmp.data.integer = strtoll(str, &endptr, 0);
582 break;
583 case SDB_TYPE_DECIMAL:
584 tmp.data.decimal = strtod(str, &endptr);
585 break;
586 case SDB_TYPE_STRING:
587 tmp.data.string = str;
588 break;
589 case SDB_TYPE_DATETIME:
590 {
591 double datetime = strtod(str, &endptr);
592 tmp.data.datetime = DOUBLE_TO_SDB_TIME(datetime);
593 }
594 break;
595 case SDB_TYPE_BINARY:
596 /* we don't support any binary information containing 0-bytes */
597 tmp.data.binary.length = strlen(str);
598 tmp.data.binary.datum = (unsigned char *)str;
599 break;
600 case SDB_TYPE_REGEX:
601 tmp.data.re.raw = strdup(str);
602 if (! tmp.data.re.raw)
603 return -1;
604 if (regcomp(&tmp.data.re.regex, tmp.data.re.raw,
605 REG_EXTENDED | REG_ICASE | REG_NOSUB)) {
606 sdb_log(SDB_LOG_ERR, "core: Failed to compile regular "
607 "expression '%s'", tmp.data.re.raw);
608 free(tmp.data.re.raw);
609 return -1;
610 }
611 if (! data) {
612 tmp.type = SDB_TYPE_REGEX;
613 sdb_data_free_datum(&tmp);
614 }
615 break;
616 default:
617 errno = EINVAL;
618 return -1;
619 }
621 if ((type == SDB_TYPE_INTEGER) || (type == SDB_TYPE_DECIMAL)
622 || (type == SDB_TYPE_DATETIME)) {
623 if (errno || (str == endptr)) {
624 char errbuf[1024];
625 sdb_log(SDB_LOG_ERR, "core: Failed to parse string "
626 "'%s' as numeric value (type %i): %s", str, type,
627 sdb_strerror(errno, errbuf, sizeof(errbuf)));
628 return -1;
629 }
630 else if (endptr && (*endptr != '\0'))
631 sdb_log(SDB_LOG_WARNING, "core: Ignoring garbage after "
632 "number while parsing numeric value (type %i): %s.",
633 type, endptr);
634 }
636 if (data) {
637 *data = tmp;
638 data->type = type;
639 }
640 return 0;
641 } /* sdb_data_parse */
643 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */