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 <assert.h>
39 #include <errno.h>
41 #include <inttypes.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
47 #include <math.h>
49 /*
50 * Operator support maxtrix.
51 * <type1> <op> <type2> -> op_matrix[<op>][<type1>][<type2>]
52 */
54 /* add, sub, mul, div, mod, concat */
56 /* integer, decimal, string, datetime, binary, regex */
58 static int op_matrix[6][6][6] = {
59 /* SDB_DATA_ADD */
60 {
61 { SDB_TYPE_INTEGER, -1, -1, -1, -1, -1 },
62 { -1, SDB_TYPE_DECIMAL, -1, -1, -1, -1 },
63 { -1, -1, -1, -1, -1, -1 },
64 { -1, -1, -1, SDB_TYPE_DATETIME, -1, -1 },
65 { -1, -1, -1, -1, -1, -1 },
66 { -1, -1, -1, -1, -1, -1 },
67 },
69 /* SDB_DATA_SUB */
70 {
71 { SDB_TYPE_INTEGER, -1, -1, -1, -1, -1 },
72 { -1, SDB_TYPE_DECIMAL, -1, -1, -1, -1 },
73 { -1, -1, -1, -1, -1, -1 },
74 { -1, -1, -1, SDB_TYPE_DATETIME, -1, -1 },
75 { -1, -1, -1, -1, -1, -1 },
76 { -1, -1, -1, -1, -1, -1 },
77 },
79 /* SDB_DATA_MUL */
80 {
81 { SDB_TYPE_INTEGER, -1, -1, SDB_TYPE_DATETIME, -1, -1 },
82 { -1, SDB_TYPE_DECIMAL, -1, SDB_TYPE_DATETIME, -1, -1 },
83 { -1, -1, -1, -1, -1, -1 },
84 { SDB_TYPE_DATETIME, SDB_TYPE_DATETIME, -1, SDB_TYPE_DATETIME, -1, -1 },
85 { -1, -1, -1, -1, -1, -1 },
86 { -1, -1, -1, -1, -1, -1 },
87 },
89 /* SDB_DATA_DIV */
90 {
91 { SDB_TYPE_INTEGER, -1, -1, -1, -1, -1 },
92 { -1, SDB_TYPE_DECIMAL, -1, -1, -1, -1 },
93 { -1, -1, -1, -1, -1, -1 },
94 { SDB_TYPE_DATETIME, SDB_TYPE_DATETIME, -1, SDB_TYPE_DATETIME, -1, -1 },
95 { -1, -1, -1, -1, -1, -1 },
96 { -1, -1, -1, -1, -1, -1 },
97 },
99 /* SDB_DATA_MOD */
100 {
101 { SDB_TYPE_INTEGER, -1, -1, -1, -1, -1 },
102 { -1, SDB_TYPE_DECIMAL, -1, -1, -1, -1 },
103 { -1, -1, -1, -1, -1, -1 },
104 { SDB_TYPE_DATETIME, SDB_TYPE_DATETIME, -1, SDB_TYPE_DATETIME, -1, -1 },
105 { -1, -1, -1, -1, -1, -1 },
106 { -1, -1, -1, -1, -1, -1 },
107 },
109 /* SDB_DATA_CONCAT */
110 {
111 { -1, -1, -1, -1, -1, -1 },
112 { -1, -1, -1, -1, -1, -1 },
113 { -1, -1, SDB_TYPE_STRING, -1, -1, -1 },
114 { -1, -1, -1, -1, -1, -1 },
115 { -1, -1, -1, -1, SDB_TYPE_BINARY, -1 },
116 { -1, -1, -1, -1, -1, -1 },
117 },
118 };
120 /*
121 * private helper functions
122 */
124 /* this function supports in-place copies */
125 static int
126 copy_array_values(sdb_data_t *dst, const sdb_data_t *src, size_t elem_size)
127 {
128 int type = src->type & 0xff;
130 if ((type == SDB_TYPE_INTEGER) || (type == SDB_TYPE_DECIMAL)) {
131 if (dst != src)
132 memcpy(dst->data.array.values, src->data.array.values,
133 src->data.array.length * elem_size);
134 }
135 else if (type == SDB_TYPE_STRING) {
136 char **s = src->data.array.values;
137 char **d = dst->data.array.values;
138 size_t i;
140 for (i = 0; i < src->data.array.length; ++i) {
141 d[i] = strdup(s[i]);
142 if (! d[i])
143 return -1;
144 }
145 }
146 else {
147 /* TODO */
148 errno = ENOTSUP;
149 return -1;
150 }
151 return 0;
152 } /* copy_array_values */
154 static void
155 free_array_values(sdb_data_t *datum)
156 {
157 int type = datum->type & 0xff;
159 if (type == SDB_TYPE_STRING) {
160 char **v = datum->data.array.values;
161 size_t i;
163 for (i = 0; i < datum->data.array.length; ++i) {
164 if (v[i])
165 free(v[i]);
166 v[i] = NULL;
167 }
168 }
169 } /* free_array_values */
171 /* compare two arrays element-by-element returning how the first non-equal
172 * elements compare to each other */
173 static int
174 array_cmp(const sdb_data_t *a1, const sdb_data_t *a2)
175 {
176 int type = a1->type & 0xff;
177 size_t len, i;
179 assert((a1->type == a2->type) && (a1->type & SDB_TYPE_ARRAY));
181 len = SDB_MIN(a1->data.array.length, a2->data.array.length);
183 if (type == SDB_TYPE_INTEGER) {
184 int64_t *v1 = a1->data.array.values;
185 int64_t *v2 = a2->data.array.values;
187 for (i = 0; i < len; ++i)
188 if (v1[i] != v2[i])
189 return SDB_CMP(v1[i], v2[i]);
190 }
191 else if (type == SDB_TYPE_DECIMAL) {
192 double *v1 = a1->data.array.values;
193 double *v2 = a2->data.array.values;
195 for (i = 0; i < len; ++i)
196 if (v1[i] != v2[i])
197 return SDB_CMP(v1[i], v2[i]);
198 }
199 else if (type == SDB_TYPE_STRING) {
200 char **v1 = a1->data.array.values;
201 char **v2 = a2->data.array.values;
203 for (i = 0; i < len; ++i) {
204 int diff = strcasecmp(v1[i], v2[i]);
205 if (diff)
206 return diff;
207 }
208 }
209 else {
210 /* TODO */
211 errno = ENOTSUP;
212 /* but fall through to ensure stable sorting: */
213 }
214 return SDB_CMP(a1->data.array.length, a2->data.array.length);
215 } /* array_cmp */
217 /* Calculate the linear function 'd1 + n * d2'. */
218 static int
219 data_lin(const sdb_data_t *d1, int n, const sdb_data_t *d2, sdb_data_t *res)
220 {
221 if (d1->type != d2->type)
222 return -1;
224 if (d1->type == SDB_TYPE_INTEGER)
225 res->data.integer = d1->data.integer + (int64_t)n * d2->data.integer;
226 else if (d1->type == SDB_TYPE_DECIMAL)
227 res->data.decimal = d1->data.decimal + (double)n * d2->data.decimal;
228 else if (d1->type == SDB_TYPE_DATETIME)
229 res->data.datetime = d1->data.datetime + (sdb_time_t)n * d2->data.datetime;
230 else
231 return -1;
232 res->type = d1->type;
233 return 0;
234 } /* data_lin */
236 /* Multiply d1 with d2. */
237 static int
238 data_mul(const sdb_data_t *d1, const sdb_data_t *d2, sdb_data_t *res)
239 {
240 if (d1->type == SDB_TYPE_INTEGER) {
241 if (d2->type == SDB_TYPE_INTEGER)
242 res->data.integer = d1->data.integer * d2->data.integer;
243 else if (d2->type == SDB_TYPE_DATETIME) {
244 res->data.datetime = (sdb_time_t)d1->data.integer
245 * d2->data.datetime;
246 res->type = SDB_TYPE_DATETIME;
247 return 0;
248 }
249 else
250 return -1;
251 }
252 else if (d1->type == SDB_TYPE_DECIMAL) {
253 if (d2->type == SDB_TYPE_DECIMAL)
254 res->data.decimal = d1->data.decimal * d2->data.decimal;
255 else if (d2->type == SDB_TYPE_DATETIME) {
256 res->data.datetime = (sdb_time_t)(d1->data.decimal
257 * (double)d2->data.datetime);
258 res->type = SDB_TYPE_DATETIME;
259 return 0;
260 }
261 else
262 return -1;
263 }
264 else if (d1->type == SDB_TYPE_DATETIME) {
265 if (d2->type == SDB_TYPE_DATETIME)
266 res->data.datetime = d1->data.datetime
267 * d2->data.datetime;
268 else if (d2->type == SDB_TYPE_INTEGER)
269 res->data.datetime = d1->data.datetime
270 * (sdb_time_t)d2->data.integer;
271 else if (d2->type == SDB_TYPE_DECIMAL)
272 res->data.datetime = (sdb_time_t)((double)d1->data.datetime
273 * d2->data.decimal);
274 else
275 return -1;
276 }
277 else
278 return -1;
280 res->type = d1->type;
281 return 0;
282 } /* data_mul */
284 /* Device d1 by d2 and return the result and the remainder. */
285 static int
286 data_div(const sdb_data_t *d1, const sdb_data_t *d2,
287 sdb_data_t *res, sdb_data_t *rem)
288 {
289 if (d1->type == SDB_TYPE_INTEGER) {
290 if (d2->type != SDB_TYPE_INTEGER)
291 return -1;
292 if (res)
293 res->data.integer = d1->data.integer / d2->data.integer;
294 if (rem)
295 rem->data.integer = d1->data.integer % d2->data.integer;
296 }
297 else if (d1->type == SDB_TYPE_DECIMAL) {
298 if (d2->type != SDB_TYPE_DECIMAL)
299 return -1;
300 if (res)
301 res->data.decimal = d1->data.decimal / d2->data.decimal;
302 if (rem)
303 rem->data.decimal = fmod(d1->data.decimal, d2->data.decimal);
304 }
305 else if (d1->type == SDB_TYPE_DATETIME) {
306 if (d2->type == SDB_TYPE_DECIMAL) {
307 if (res)
308 res->data.datetime = (sdb_time_t)((double)d1->data.datetime
309 / d2->data.decimal);
310 if (rem) {
311 double tmp = fmod((double)d1->data.datetime, d2->data.decimal);
312 rem->data.datetime = (sdb_time_t)tmp;
313 }
314 }
315 else {
316 sdb_time_t a, b;
317 if (d2->type == SDB_TYPE_DATETIME) {
318 a = d1->data.datetime;
319 b = d2->data.datetime;
320 }
321 else if (d2->type == SDB_TYPE_INTEGER) {
322 a = d1->data.datetime;
323 b = (sdb_time_t)d2->data.integer;
324 }
325 else
326 return -1;
327 if (res)
328 res->data.datetime = a / b;
329 if (rem)
330 rem->data.datetime = a % b;
331 }
332 }
333 else
334 return -1;
336 if (res)
337 res->type = d1->type;
338 if (rem)
339 rem->type = d1->type;
340 return 0;
341 } /* data_div */
343 /* Concatenate d1 and d2. */
344 static int
345 data_concat(const sdb_data_t *d1, const sdb_data_t *d2, sdb_data_t *res)
346 {
347 unsigned char *new;
348 const unsigned char *s1, *s2;
349 size_t len1, len2, array1_len = 0, array2_len = 0;
351 if ((d1->type & 0xff) != (d2->type & 0xff))
352 return -1;
354 if ((d1->type & SDB_TYPE_ARRAY) || (d2->type & SDB_TYPE_ARRAY)) {
355 size_t elem_size = sdb_data_sizeof(d1->type & 0xff);
356 if (d1->type & SDB_TYPE_ARRAY) {
357 s1 = (const unsigned char *)d1->data.array.values;
358 array1_len = d1->data.array.length;
359 }
360 else {
361 /* As per C99, section 6.7.2.1, paragraph 14:
362 * "A pointer to a union object, suitably converted, points to
363 * each of its members" */
364 s1 = (const unsigned char *)&d1->data;
365 array1_len = 1;
366 }
367 if (d2->type & SDB_TYPE_ARRAY) {
368 s2 = (const unsigned char *)d2->data.array.values;
369 array2_len = d2->data.array.length;
370 }
371 else {
372 s2 = (const unsigned char *)&d2->data;
373 array2_len = 1;
374 }
375 len1 = array1_len * elem_size;
376 len2 = array2_len * elem_size;
377 }
378 else if (d1->type == SDB_TYPE_STRING) {
379 s1 = (unsigned char *)d1->data.string;
380 s2 = (unsigned char *)d2->data.string;
381 len1 = s1 ? strlen((const char *)s1) : 0;
382 len2 = s2 ? strlen((const char *)s2) : 0;
383 }
384 else if (d1->type == SDB_TYPE_BINARY) {
385 s1 = d1->data.binary.datum;
386 s2 = d2->data.binary.datum;
387 len1 = d1->data.binary.length;
388 len2 = d2->data.binary.length;
389 }
390 else
391 return -1;
393 new = malloc(len1 + len2 + 1);
394 if (! new)
395 return -1;
397 if (len1)
398 memcpy(new, s1, len1);
399 if (len2)
400 memcpy(new + len1, s2, len2);
401 new[len1 + len2] = '\0';
403 /* element types match and if either datum is an array,
404 * the result is an array as well */
405 res->type = d1->type | d2->type;
406 if (res->type == SDB_TYPE_STRING) {
407 res->data.string = (char *)new;
408 }
409 else if (res->type == SDB_TYPE_BINARY) {
410 res->data.binary.datum = new;
411 res->data.binary.length = len1 + len2;
412 }
413 else if (res->type & SDB_TYPE_ARRAY) {
414 res->data.array.values = new;
415 res->data.array.length = array1_len + array2_len;
416 if (copy_array_values(res, res, sdb_data_sizeof(res->type & 0xff))) {
417 /* this leaks already copied values but there's not much we can
418 * do and this should only happen if we're in trouble anyway */
419 free(new);
420 res->data.array.values = NULL;
421 res->data.array.length = 0;
422 return -1;
423 }
424 }
425 return 0;
426 } /* data_concat */
428 /*
429 * public API
430 */
432 const sdb_data_t SDB_DATA_NULL = SDB_DATA_INIT;
434 int
435 sdb_data_copy(sdb_data_t *dst, const sdb_data_t *src)
436 {
437 sdb_data_t tmp;
439 if ((! dst) || (! src))
440 return -1;
442 tmp = *src;
443 if (src->type == SDB_TYPE_STRING) {
444 if (src->data.string) {
445 tmp.data.string = strdup(src->data.string);
446 if (! tmp.data.string)
447 return -1;
448 }
449 }
450 else if (src->type == SDB_TYPE_BINARY) {
451 if (src->data.binary.datum) {
452 tmp.data.binary.datum = malloc(src->data.binary.length);
453 if (! tmp.data.binary.datum)
454 return -1;
455 memcpy(tmp.data.binary.datum, src->data.binary.datum,
456 src->data.binary.length);
457 }
458 }
459 else if (src->type == SDB_TYPE_REGEX) {
460 if (src->data.re.raw) {
461 tmp.data.re.raw = strdup(src->data.re.raw);
462 if (! tmp.data.re.raw)
463 return -1;
464 /* we need to recompile because the regex might point to
465 * dynamically allocated memory */
466 if (regcomp(&tmp.data.re.regex, tmp.data.re.raw,
467 REG_EXTENDED | REG_ICASE | REG_NOSUB)) {
468 free(tmp.data.re.raw);
469 return -1;
470 }
471 }
472 else
473 memset(&tmp.data.re.regex, 0, sizeof(tmp.data.re.regex));
474 }
475 else if (src->type & SDB_TYPE_ARRAY) {
476 if (src->data.array.values) {
477 size_t elem_size = sdb_data_sizeof(src->type & 0xff);
478 tmp.data.array.values = calloc(src->data.array.length, elem_size);
479 if (! tmp.data.array.values)
480 return -1;
481 if (copy_array_values(&tmp, src, elem_size)) {
482 sdb_data_free_datum(&tmp);
483 return -1;
484 }
485 }
486 }
488 sdb_data_free_datum(dst);
489 *dst = tmp;
490 return 0;
491 } /* sdb_data_copy */
493 void
494 sdb_data_free_datum(sdb_data_t *datum)
495 {
496 if (! datum)
497 return;
499 if (datum->type == SDB_TYPE_STRING) {
500 if (datum->data.string)
501 free(datum->data.string);
502 datum->data.string = NULL;
503 }
504 else if (datum->type == SDB_TYPE_BINARY) {
505 if (datum->data.binary.datum)
506 free(datum->data.binary.datum);
507 datum->data.binary.datum = NULL;
508 datum->data.binary.length = 0;
509 }
510 else if (datum->type == SDB_TYPE_REGEX) {
511 if (datum->data.re.raw) {
512 free(datum->data.re.raw);
513 regfree(&datum->data.re.regex);
514 }
515 datum->data.re.raw = NULL;
516 memset(&datum->data.re.regex, 0, sizeof(datum->data.re.regex));
517 }
518 else if (datum->type & SDB_TYPE_ARRAY) {
519 free_array_values(datum);
520 if (datum->data.array.values)
521 free(datum->data.array.values);
522 datum->data.array.values = NULL;
523 datum->data.array.length = 0;
524 }
525 } /* sdb_data_free_datum */
527 int
528 sdb_data_cmp(const sdb_data_t *d1, const sdb_data_t *d2)
529 {
530 #define CMP_NULL(a, b) \
531 do { \
532 if (!(a) && !(b)) return 0; \
533 if (!(a)) return -1; \
534 if (!(b)) return 1; \
535 } while (0)
537 CMP_NULL(d1, d2);
539 if (d1->type != d2->type)
540 return SDB_CMP(d1->type, d2->type);
542 if (d1->type == SDB_TYPE_INTEGER)
543 return SDB_CMP(d1->data.integer, d2->data.integer);
544 else if (d1->type == SDB_TYPE_DECIMAL)
545 return SDB_CMP(d1->data.decimal, d2->data.decimal);
546 else if (d1->type == SDB_TYPE_STRING) {
547 CMP_NULL(d1->data.string, d2->data.string);
548 return strcasecmp(d1->data.string, d2->data.string);
549 }
550 else if (d1->type == SDB_TYPE_DATETIME)
551 return SDB_CMP(d1->data.datetime, d2->data.datetime);
552 else if (d1->type == SDB_TYPE_BINARY) {
553 int diff;
555 CMP_NULL(d1->data.binary.datum, d2->data.binary.datum);
557 /* on a common prefix, the shorter datum sorts less */
558 if (d1->data.binary.length < d2->data.binary.length) {
559 diff = memcmp(d1->data.binary.datum, d2->data.binary.datum,
560 d1->data.binary.length);
561 diff = diff ? diff : -1;
562 }
563 else if (d1->data.binary.length > d2->data.binary.length) {
564 diff = memcmp(d1->data.binary.datum, d2->data.binary.datum,
565 d2->data.binary.length);
566 diff = diff ? diff : 1;
567 }
568 else
569 diff = memcmp(d1->data.binary.datum, d2->data.binary.datum,
570 d1->data.binary.length);
572 return diff;
573 }
574 else if (d1->type == SDB_TYPE_REGEX) {
575 CMP_NULL(d1->data.re.raw, d2->data.re.raw);
576 return strcmp(d1->data.re.raw, d2->data.re.raw);
577 }
578 else if (d1->type & SDB_TYPE_ARRAY) {
579 CMP_NULL(d1->data.array.values, d2->data.array.values);
580 return array_cmp(d1, d2);
581 }
582 return -1;
583 } /* sdb_data_cmp */
585 int
586 sdb_data_strcmp(const sdb_data_t *d1, const sdb_data_t *d2)
587 {
588 char d1_str[sdb_data_strlen(d1) + 1];
589 char d2_str[sdb_data_strlen(d2) + 1];
591 if ((d1->type & SDB_TYPE_ARRAY) || (d2->type & SDB_TYPE_ARRAY)) {
592 /* TODO */
593 errno = ENOTSUP;
594 return -1;
595 }
597 if (sdb_data_isnull(d1))
598 d1 = NULL;
599 if (sdb_data_isnull(d2))
600 d2 = NULL;
602 CMP_NULL(d1, d2);
604 if (sdb_data_format(d1, d1_str, sizeof(d1_str), SDB_UNQUOTED) < 0)
605 return SDB_CMP(sizeof(d1_str), sizeof(d2_str));
606 if (sdb_data_format(d2, d2_str, sizeof(d2_str), SDB_UNQUOTED) < 0)
607 return SDB_CMP(sizeof(d1_str), sizeof(d2_str));
609 return strcasecmp(d1_str, d2_str);
610 #undef CMP_NULL
611 } /* sdb_data_strcmp */
613 bool
614 sdb_data_isnull(const sdb_data_t *datum)
615 {
616 if (! datum)
617 return 1;
618 if (datum->type == SDB_TYPE_NULL)
619 return 1;
620 if ((datum->type == SDB_TYPE_STRING) && (! datum->data.string))
621 return 1;
622 if ((datum->type == SDB_TYPE_BINARY) && (! datum->data.binary.datum))
623 return 1;
624 if ((datum->type == SDB_TYPE_REGEX) && (! datum->data.re.raw))
625 return 1;
626 return 0;
627 } /* sdb_data_isnull */
629 bool
630 sdb_data_inarray(const sdb_data_t *value, const sdb_data_t *array)
631 {
632 const void *values;
633 size_t length, i;
634 int type = value->type & 0xff;
636 if (sdb_data_isnull(value) || sdb_data_isnull(array))
637 return 0;
638 if (! (array->type & SDB_TYPE_ARRAY))
639 return 0;
640 if ((value->type & 0xff) != (array->type & 0xff))
641 return 0;
643 if (value->type & SDB_TYPE_ARRAY) {
644 values = value->data.array.values;
645 length = value->data.array.length;
646 }
647 else {
648 values = &value->data;
649 length = 1;
650 }
652 for (i = 0; i < length; ++i) {
653 size_t j;
655 if (type == SDB_TYPE_INTEGER) {
656 int64_t *v = array->data.array.values;
657 for (j = 0; j < array->data.array.length; ++j)
658 if (((const int64_t *)values)[i] == v[j])
659 break;
660 }
661 else if (type == SDB_TYPE_DECIMAL) {
662 double *v = array->data.array.values;
663 for (j = 0; j < array->data.array.length; ++j)
664 if (((const double *)values)[i] == v[j])
665 break;
666 }
667 else if (type == SDB_TYPE_STRING) {
668 char **v = array->data.array.values;
669 for (j = 0; j < array->data.array.length; ++j)
670 if (!strcasecmp(((const char * const*)values)[i], v[j]))
671 break;
672 }
673 else {
674 /* TODO */
675 errno = ENOTSUP;
676 return 0;
677 }
679 if (j >= array->data.array.length)
680 /* value not found */
681 return 0;
682 }
683 return 1;
684 } /* sdb_data_inarray */
686 int
687 sdb_data_array_get(const sdb_data_t *array, size_t i, sdb_data_t *value)
688 {
689 sdb_data_t tmp = SDB_DATA_INIT;
690 int type;
692 if ((! array) || (! (array->type & SDB_TYPE_ARRAY)))
693 return -1;
694 if (i >= array->data.array.length)
695 return -1;
697 type = array->type & 0xff;
698 if (type == SDB_TYPE_INTEGER) {
699 int64_t *v = array->data.array.values;
700 tmp.data.integer = v[i];
701 }
702 else if (type == SDB_TYPE_DECIMAL) {
703 double *v = array->data.array.values;
704 tmp.data.decimal = v[i];
705 }
706 else if (type == SDB_TYPE_STRING) {
707 char **v = array->data.array.values;
708 tmp.data.string = v[i];
709 }
710 else {
711 /* TODO */
712 errno = ENOTSUP;
713 return -1;
714 }
716 if (value) {
717 *value = tmp;
718 value->type = type;
719 }
720 return 0;
721 } /* sdb_data_array_get */
723 int
724 sdb_data_parse_op(const char *op)
725 {
726 if (! strcmp(op, "+"))
727 return SDB_DATA_ADD;
728 else if (! strcmp(op, "-"))
729 return SDB_DATA_SUB;
730 else if (! strcmp(op, "*"))
731 return SDB_DATA_MUL;
732 else if (! strcmp(op, "/"))
733 return SDB_DATA_DIV;
734 else if (! strcmp(op, "%"))
735 return SDB_DATA_MOD;
736 else if (! strcmp(op, "||"))
737 return SDB_DATA_CONCAT;
738 return -1;
739 } /* sdb_data_parse_op */
741 int
742 sdb_data_expr_eval(int op, const sdb_data_t *d1, const sdb_data_t *d2,
743 sdb_data_t *res)
744 {
745 if ((! d1) || (! d2) || (! res))
746 return -1;
747 if (sdb_data_isnull(d1) || sdb_data_isnull(d2)) {
748 *res = SDB_DATA_NULL;
749 return 0;
750 }
751 switch (op) {
752 case SDB_DATA_CONCAT: return data_concat(d1, d2, res);
753 case SDB_DATA_ADD: return data_lin(d1, 1, d2, res);
754 case SDB_DATA_SUB: return data_lin(d1, -1, d2, res);
755 case SDB_DATA_MUL: return data_mul(d1, d2, res);
756 case SDB_DATA_DIV: return data_div(d1, d2, res, NULL);
757 case SDB_DATA_MOD: return data_div(d1, d2, NULL, res);
758 }
759 return -1;
760 } /* sdb_data_expr_eval */
762 int
763 sdb_data_expr_type(int op, int type1, int type2)
764 {
765 int types_num = (int)SDB_STATIC_ARRAY_LEN(op_matrix[0]);
767 assert(SDB_STATIC_ARRAY_LEN(op_matrix[0])
768 == SDB_STATIC_ARRAY_LEN(op_matrix[0][0]));
770 if ((op <= 0) || (SDB_STATIC_ARRAY_LEN(op_matrix) < (size_t)op))
771 return -1;
773 /* arrays only support concat; element type has to match */
774 if ((type1 & SDB_TYPE_ARRAY) || (type2 & SDB_TYPE_ARRAY)) {
775 if (((type1 & 0xff) != (type2 & 0xff)) || (op != SDB_DATA_CONCAT))
776 return -1;
777 return type1 | SDB_TYPE_ARRAY;
778 }
779 if ((type1 < 0) || (types_num < type1)
780 || (type2 < 0) || (types_num < type2))
781 return -1;
783 if ((type1 == SDB_TYPE_NULL) || (type2 == SDB_TYPE_NULL))
784 return SDB_TYPE_NULL;
785 return op_matrix[op - 1][type1 - 1][type2 - 1];
786 } /* sdb_data_expr_type */
788 size_t
789 sdb_data_strlen(const sdb_data_t *datum)
790 {
791 if (! datum)
792 return 0;
794 if (datum->type == SDB_TYPE_INTEGER) {
795 /* log(64) */
796 return 20;
797 }
798 else if (datum->type == SDB_TYPE_DECIMAL) {
799 /* XXX: -d.dddddde+dd or -ddddd.dddddd */
800 return 42;
801 }
802 else if (datum->type == SDB_TYPE_STRING) {
803 if (! datum->data.string)
804 return 6; /* NULL */
805 /* in the worst case, each character needs to be escaped */
806 return 2 * strlen(datum->data.string) + 2;
807 }
808 else if (datum->type == SDB_TYPE_DATETIME) {
809 /* "YYYY-MM-DD HH:MM:SS +zzzz" */
810 return 27;
811 }
812 else if (datum->type == SDB_TYPE_BINARY) {
813 if (! datum->data.binary.datum)
814 return 6; /* NULL */
815 /* "\xNN" */
816 return 4 * datum->data.binary.length + 2;
817 }
818 else if (datum->type == SDB_TYPE_REGEX) {
819 if (! datum->data.re.raw)
820 return 6; /* NULL */
821 /* "/.../" */
822 return strlen(datum->data.re.raw) + 4;
823 }
824 else if (datum->type & SDB_TYPE_ARRAY) {
825 size_t len = 2; /* [] */
826 size_t i;
827 for (i = 0; i < datum->data.array.length; ++i) {
828 sdb_data_t v = SDB_DATA_INIT;
829 sdb_data_array_get(datum, i, &v);
830 len += sdb_data_strlen(&v) + 1;
831 }
832 return len;
833 }
834 return 0;
835 } /* sdb_data_strlen */
837 int
838 sdb_data_format(const sdb_data_t *datum, char *buf, size_t buflen, int quoted)
839 {
840 char tmp[sdb_data_strlen(datum) + 1];
841 char *data = NULL;
842 bool is_null = 0;
843 int ret = -1;
845 size_t i, pos;
847 if ((! datum) || (! buf) || (! buflen))
848 return -1;
850 if (datum->type == SDB_TYPE_INTEGER) {
851 ret = snprintf(buf, buflen, "%"PRIi64, datum->data.integer);
852 }
853 else if (datum->type == SDB_TYPE_DECIMAL) {
854 if (isnan(datum->data.decimal))
855 ret = snprintf(buf, buflen, "nan");
856 else
857 ret = snprintf(buf, buflen, "%g", datum->data.decimal);
858 }
859 else if (datum->type == SDB_TYPE_STRING) {
860 if (! datum->data.string)
861 is_null = 1;
862 else {
863 pos = 0;
864 for (i = 0; i < strlen(datum->data.string); ++i) {
865 char byte = datum->data.string[i];
867 if ((byte == '\\') || (byte == '"')) {
868 tmp[pos] = '\\';
869 ++pos;
870 }
871 tmp[pos] = byte;
872 ++pos;
873 }
874 tmp[pos] = '\0';
875 data = tmp;
876 }
877 }
878 else if (datum->type == SDB_TYPE_DATETIME) {
879 if (! sdb_strftime(tmp, sizeof(tmp), "%F %T %z",
880 datum->data.datetime))
881 return -1;
882 tmp[sizeof(tmp) - 1] = '\0';
883 data = tmp;
884 }
885 else if (datum->type == SDB_TYPE_BINARY) {
886 pos = 0;
887 for (i = 0; i < datum->data.binary.length; ++i) {
888 int byte = (int)datum->data.binary.datum[i];
889 char hex[] = {'0', '1', '2', '3', '4', '5', '6', '7',
890 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
892 tmp[pos] = '\\';
893 tmp[pos + 1] = 'x';
894 pos += 2;
896 if (byte > 0xf) {
897 tmp[pos] = hex[byte >> 4];
898 ++pos;
899 }
900 tmp[pos] = hex[byte & 0xf];
901 ++pos;
902 }
903 if (datum->data.binary.datum) {
904 tmp[pos] = '\0';
905 data = tmp;
906 }
907 else
908 is_null = 1;
909 }
910 else if (datum->type == SDB_TYPE_REGEX) {
911 if (! datum->data.re.raw)
912 is_null = 1;
913 else {
914 snprintf(tmp, sizeof(tmp), "/%s/", datum->data.re.raw);
915 data = tmp;
916 }
917 }
918 else if (datum->type & SDB_TYPE_ARRAY) {
919 ret = 1;
920 buf[0] = '[';
921 for (i = 0; i < datum->data.array.length; ++i) {
922 sdb_data_t v = SDB_DATA_INIT;
923 int n;
924 if ((size_t)ret >= buflen - 1)
925 break;
927 if (ret > 1) {
928 buf[ret] = ',';
929 buf[ret + 1] = ' ';
930 ret += 2;
931 }
933 sdb_data_array_get(datum, i, &v);
934 n = sdb_data_format(&v, buf + ret, buflen - ret, quoted);
935 if (n > 0)
936 ret += n;
937 else
938 break;
939 }
940 if ((size_t)ret < buflen - 1) {
941 buf[ret] = ']';
942 buf[ret + 1] = '\0';
943 ++ret;
944 }
945 }
947 if (is_null) {
948 /* never quote NULL */
949 strncpy(buf, "NULL", buflen);
950 ret = (int)SDB_MIN(buflen, 4);
951 }
952 else if (data) {
953 if (quoted == SDB_UNQUOTED)
954 ret = snprintf(buf, buflen, "%s", data);
955 else if (quoted == SDB_SINGLE_QUOTED)
956 ret = snprintf(buf, buflen, "'%s'", data);
957 else
958 ret = snprintf(buf, buflen, "\"%s\"", data);
959 }
960 buf[buflen - 1] = '\0';
961 return ret;
962 } /* sdb_data_format */
964 int
965 sdb_data_parse(char *str, int type, sdb_data_t *data)
966 {
967 sdb_data_t tmp;
969 char *endptr = NULL;
971 errno = 0;
972 if (type == SDB_TYPE_INTEGER) {
973 tmp.data.integer = strtoll(str, &endptr, 0);
974 }
975 else if (type == SDB_TYPE_DECIMAL) {
976 tmp.data.decimal = strtod(str, &endptr);
977 }
978 else if (type == SDB_TYPE_STRING) {
979 tmp.data.string = str;
980 }
981 else if (type == SDB_TYPE_DATETIME) {
982 double datetime = strtod(str, &endptr);
983 tmp.data.datetime = DOUBLE_TO_SDB_TIME(datetime);
984 }
985 else if (type == SDB_TYPE_BINARY) {
986 /* we don't support any binary information containing 0-bytes */
987 tmp.data.binary.length = strlen(str);
988 tmp.data.binary.datum = (unsigned char *)str;
989 }
990 else if (type == SDB_TYPE_REGEX) {
991 tmp.data.re.raw = strdup(str);
992 if (! tmp.data.re.raw)
993 return -1;
994 if (regcomp(&tmp.data.re.regex, tmp.data.re.raw,
995 REG_EXTENDED | REG_ICASE | REG_NOSUB)) {
996 sdb_log(SDB_LOG_ERR, "core: Failed to compile regular "
997 "expression '%s'", tmp.data.re.raw);
998 free(tmp.data.re.raw);
999 return -1;
1000 }
1001 if (! data) {
1002 tmp.type = SDB_TYPE_REGEX;
1003 sdb_data_free_datum(&tmp);
1004 }
1005 }
1006 else if (type & SDB_TYPE_ARRAY) {
1007 /* TODO */
1008 errno = ENOTSUP;
1009 return -1;
1010 }
1011 else {
1012 errno = EINVAL;
1013 return -1;
1014 }
1016 if ((type == SDB_TYPE_INTEGER) || (type == SDB_TYPE_DECIMAL)
1017 || (type == SDB_TYPE_DATETIME)) {
1018 if (errno || (str == endptr)) {
1019 char errbuf[1024];
1020 sdb_log(SDB_LOG_ERR, "core: Failed to parse string "
1021 "'%s' as numeric value (type %i): %s", str, type,
1022 sdb_strerror(errno, errbuf, sizeof(errbuf)));
1023 return -1;
1024 }
1025 else if (endptr && (*endptr != '\0'))
1026 sdb_log(SDB_LOG_WARNING, "core: Ignoring garbage after "
1027 "number while parsing numeric value (type %i): %s.",
1028 type, endptr);
1029 }
1031 if (data) {
1032 *data = tmp;
1033 data->type = type;
1034 }
1035 return 0;
1036 } /* sdb_data_parse */
1038 size_t
1039 sdb_data_sizeof(int type)
1040 {
1041 sdb_data_t v;
1042 if (type == SDB_TYPE_INTEGER)
1043 return sizeof(v.data.integer);
1044 else if (type == SDB_TYPE_DECIMAL)
1045 return sizeof(v.data.decimal);
1046 else if (type == SDB_TYPE_STRING)
1047 return sizeof(v.data.string);
1048 else if (type == SDB_TYPE_DATETIME)
1049 return sizeof(v.data.datetime);
1050 else if (type == SDB_TYPE_BINARY)
1051 return sizeof(v.data.binary);
1052 else if (type == SDB_TYPE_REGEX)
1053 return sizeof(v.data.re);
1054 return 0;
1055 } /* sdb_data_sizeof */
1057 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */