28d4c36ad66cbd92149ef6bea5a1f97d0e635ca4
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 unsigned char *s1, *s2;
349 size_t len1, len2;
351 /* TODO: support array plus element */
352 if (d1->type != d2->type)
353 return -1;
355 if (d1->type == SDB_TYPE_STRING) {
356 s1 = (unsigned char *)d1->data.string;
357 s2 = (unsigned char *)d2->data.string;
358 len1 = s1 ? strlen((char *)s1) : 0;
359 len2 = s2 ? strlen((char *)s2) : 0;
360 }
361 else if (d1->type == SDB_TYPE_BINARY) {
362 s1 = d1->data.binary.datum;
363 s2 = d2->data.binary.datum;
364 len1 = d1->data.binary.length;
365 len2 = d2->data.binary.length;
366 }
367 else if (d1->type & SDB_TYPE_ARRAY) {
368 size_t elem_size = sdb_data_sizeof(d1->type & 0xff);
369 s1 = (unsigned char *)d1->data.array.values;
370 s2 = (unsigned char *)d2->data.array.values;
371 len1 = d1->data.array.length * elem_size;
372 len2 = d2->data.array.length * elem_size;
373 }
374 else
375 return -1;
377 assert(s1 && s2);
379 new = malloc(len1 + len2 + 1);
380 if (! new)
381 return -1;
383 if (len1)
384 memcpy(new, s1, len1);
385 if (len2)
386 memcpy(new + len1, s2, len2);
387 new[len1 + len2] = '\0';
389 res->type = d1->type;
390 if (res->type == SDB_TYPE_STRING) {
391 res->data.string = (char *)new;
392 }
393 else if (res->type == SDB_TYPE_BINARY) {
394 res->data.binary.datum = new;
395 res->data.binary.length = len1 + len2;
396 }
397 else if (d1->type & SDB_TYPE_ARRAY) {
398 res->data.array.values = new;
399 res->data.array.length = d1->data.array.length + d2->data.array.length;
400 if (copy_array_values(res, res, sdb_data_sizeof(res->type & 0xff))) {
401 /* this leaks already copied values but there's not much we can
402 * do and this should only happen if we're in trouble anyway */
403 free(new);
404 res->data.array.values = NULL;
405 res->data.array.length = 0;
406 return -1;
407 }
408 }
409 return 0;
410 } /* data_concat */
412 /*
413 * public API
414 */
416 const sdb_data_t SDB_DATA_NULL = SDB_DATA_INIT;
418 int
419 sdb_data_copy(sdb_data_t *dst, const sdb_data_t *src)
420 {
421 sdb_data_t tmp;
423 if ((! dst) || (! src))
424 return -1;
426 tmp = *src;
427 if (src->type == SDB_TYPE_STRING) {
428 if (src->data.string) {
429 tmp.data.string = strdup(src->data.string);
430 if (! tmp.data.string)
431 return -1;
432 }
433 }
434 else if (src->type == SDB_TYPE_BINARY) {
435 if (src->data.binary.datum) {
436 tmp.data.binary.datum = malloc(src->data.binary.length);
437 if (! tmp.data.binary.datum)
438 return -1;
439 memcpy(tmp.data.binary.datum, src->data.binary.datum,
440 src->data.binary.length);
441 }
442 }
443 else if (src->type == SDB_TYPE_REGEX) {
444 if (src->data.re.raw) {
445 tmp.data.re.raw = strdup(src->data.re.raw);
446 if (! tmp.data.re.raw)
447 return -1;
448 /* we need to recompile because the regex might point to
449 * dynamically allocated memory */
450 if (regcomp(&tmp.data.re.regex, tmp.data.re.raw,
451 REG_EXTENDED | REG_ICASE | REG_NOSUB)) {
452 free(tmp.data.re.raw);
453 return -1;
454 }
455 }
456 else
457 memset(&tmp.data.re.regex, 0, sizeof(tmp.data.re.regex));
458 }
459 else if (src->type & SDB_TYPE_ARRAY) {
460 if (src->data.array.values) {
461 size_t elem_size = sdb_data_sizeof(src->type & 0xff);
462 tmp.data.array.values = calloc(src->data.array.length, elem_size);
463 if (! tmp.data.array.values)
464 return -1;
465 if (copy_array_values(&tmp, src, elem_size)) {
466 sdb_data_free_datum(&tmp);
467 return -1;
468 }
469 }
470 }
472 sdb_data_free_datum(dst);
473 *dst = tmp;
474 return 0;
475 } /* sdb_data_copy */
477 void
478 sdb_data_free_datum(sdb_data_t *datum)
479 {
480 if (! datum)
481 return;
483 if (datum->type == SDB_TYPE_STRING) {
484 if (datum->data.string)
485 free(datum->data.string);
486 datum->data.string = NULL;
487 }
488 else if (datum->type == SDB_TYPE_BINARY) {
489 if (datum->data.binary.datum)
490 free(datum->data.binary.datum);
491 datum->data.binary.datum = NULL;
492 datum->data.binary.length = 0;
493 }
494 else if (datum->type == SDB_TYPE_REGEX) {
495 if (datum->data.re.raw) {
496 free(datum->data.re.raw);
497 regfree(&datum->data.re.regex);
498 }
499 datum->data.re.raw = NULL;
500 memset(&datum->data.re.regex, 0, sizeof(datum->data.re.regex));
501 }
502 else if (datum->type & SDB_TYPE_ARRAY) {
503 free_array_values(datum);
504 if (datum->data.array.values)
505 free(datum->data.array.values);
506 datum->data.array.values = NULL;
507 datum->data.array.length = 0;
508 }
509 } /* sdb_data_free_datum */
511 int
512 sdb_data_cmp(const sdb_data_t *d1, const sdb_data_t *d2)
513 {
514 #define CMP_NULL(a, b) \
515 do { \
516 if (!(a) && !(b)) return 0; \
517 if (!(a)) return -1; \
518 if (!(b)) return 1; \
519 } while (0)
521 CMP_NULL(d1, d2);
523 if (d1->type != d2->type)
524 return SDB_CMP(d1->type, d2->type);
526 if (d1->type == SDB_TYPE_INTEGER)
527 return SDB_CMP(d1->data.integer, d2->data.integer);
528 else if (d1->type == SDB_TYPE_DECIMAL)
529 return SDB_CMP(d1->data.decimal, d2->data.decimal);
530 else if (d1->type == SDB_TYPE_STRING) {
531 CMP_NULL(d1->data.string, d2->data.string);
532 return strcasecmp(d1->data.string, d2->data.string);
533 }
534 else if (d1->type == SDB_TYPE_DATETIME)
535 return SDB_CMP(d1->data.datetime, d2->data.datetime);
536 else if (d1->type == SDB_TYPE_BINARY) {
537 int diff;
539 CMP_NULL(d1->data.binary.datum, d2->data.binary.datum);
541 /* on a common prefix, the shorter datum sorts less */
542 if (d1->data.binary.length < d2->data.binary.length) {
543 diff = memcmp(d1->data.binary.datum, d2->data.binary.datum,
544 d1->data.binary.length);
545 diff = diff ? diff : -1;
546 }
547 else if (d1->data.binary.length > d2->data.binary.length) {
548 diff = memcmp(d1->data.binary.datum, d2->data.binary.datum,
549 d2->data.binary.length);
550 diff = diff ? diff : 1;
551 }
552 else
553 diff = memcmp(d1->data.binary.datum, d2->data.binary.datum,
554 d1->data.binary.length);
556 return diff;
557 }
558 else if (d1->type == SDB_TYPE_REGEX) {
559 CMP_NULL(d1->data.re.raw, d2->data.re.raw);
560 return strcmp(d1->data.re.raw, d2->data.re.raw);
561 }
562 else if (d1->type & SDB_TYPE_ARRAY) {
563 CMP_NULL(d1->data.array.values, d2->data.array.values);
564 return array_cmp(d1, d2);
565 }
566 return -1;
567 } /* sdb_data_cmp */
569 int
570 sdb_data_strcmp(const sdb_data_t *d1, const sdb_data_t *d2)
571 {
572 char d1_str[sdb_data_strlen(d1) + 1];
573 char d2_str[sdb_data_strlen(d2) + 1];
575 if ((d1->type & SDB_TYPE_ARRAY) || (d2->type & SDB_TYPE_ARRAY)) {
576 /* TODO */
577 errno = ENOTSUP;
578 return -1;
579 }
581 if (sdb_data_isnull(d1))
582 d1 = NULL;
583 if (sdb_data_isnull(d2))
584 d2 = NULL;
586 CMP_NULL(d1, d2);
588 if (sdb_data_format(d1, d1_str, sizeof(d1_str), SDB_UNQUOTED) < 0)
589 return SDB_CMP(sizeof(d1_str), sizeof(d2_str));
590 if (sdb_data_format(d2, d2_str, sizeof(d2_str), SDB_UNQUOTED) < 0)
591 return SDB_CMP(sizeof(d1_str), sizeof(d2_str));
593 return strcasecmp(d1_str, d2_str);
594 #undef CMP_NULL
595 } /* sdb_data_strcmp */
597 _Bool
598 sdb_data_isnull(const sdb_data_t *datum)
599 {
600 if (! datum)
601 return 1;
602 if (datum->type == SDB_TYPE_NULL)
603 return 1;
604 if ((datum->type == SDB_TYPE_STRING) && (! datum->data.string))
605 return 1;
606 if ((datum->type == SDB_TYPE_BINARY) && (! datum->data.binary.datum))
607 return 1;
608 if ((datum->type == SDB_TYPE_REGEX) && (! datum->data.re.raw))
609 return 1;
610 return 0;
611 } /* sdb_data_isnull */
613 _Bool
614 sdb_data_inarray(const sdb_data_t *value, const sdb_data_t *array)
615 {
616 size_t i;
618 if (sdb_data_isnull(value) || sdb_data_isnull(array))
619 return 0;
620 if ((value->type & SDB_TYPE_ARRAY) || (! (array->type & SDB_TYPE_ARRAY)))
621 return 0;
622 if (value->type != (array->type & 0xff))
623 return 0;
625 if (value->type == SDB_TYPE_INTEGER) {
626 int64_t *v = array->data.array.values;
627 for (i = 0; i < array->data.array.length; ++i)
628 if (value->data.integer == v[i])
629 return 1;
630 }
631 else if (value->type == SDB_TYPE_DECIMAL) {
632 double *v = array->data.array.values;
633 for (i = 0; i < array->data.array.length; ++i)
634 if (value->data.decimal == v[i])
635 return 1;
636 }
637 else if (value->type == SDB_TYPE_STRING) {
638 char **v = array->data.array.values;
639 for (i = 0; i < array->data.array.length; ++i)
640 if (!strcasecmp(value->data.string, v[i]))
641 return 1;
642 }
643 else {
644 /* TODO */
645 errno = ENOTSUP;
646 return 0;
647 }
648 return 0;
649 } /* sdb_data_inarray */
651 int
652 sdb_data_array_get(const sdb_data_t *array, size_t i, sdb_data_t *value)
653 {
654 sdb_data_t tmp = SDB_DATA_INIT;
655 int type;
657 if ((! array) || (! (array->type & SDB_TYPE_ARRAY)))
658 return -1;
659 if (i >= array->data.array.length)
660 return -1;
662 type = array->type & 0xff;
663 if (type == SDB_TYPE_INTEGER) {
664 int64_t *v = array->data.array.values;
665 tmp.data.integer = v[i];
666 }
667 else if (type == SDB_TYPE_DECIMAL) {
668 double *v = array->data.array.values;
669 tmp.data.decimal = v[i];
670 }
671 else if (type == SDB_TYPE_STRING) {
672 char **v = array->data.array.values;
673 tmp.data.string = v[i];
674 }
675 else {
676 /* TODO */
677 errno = ENOTSUP;
678 return -1;
679 }
681 if (value) {
682 *value = tmp;
683 value->type = type;
684 }
685 return 0;
686 } /* sdb_data_array_get */
688 int
689 sdb_data_parse_op(const char *op)
690 {
691 if (! strcmp(op, "+"))
692 return SDB_DATA_ADD;
693 else if (! strcmp(op, "-"))
694 return SDB_DATA_SUB;
695 else if (! strcmp(op, "*"))
696 return SDB_DATA_MUL;
697 else if (! strcmp(op, "/"))
698 return SDB_DATA_DIV;
699 else if (! strcmp(op, "%"))
700 return SDB_DATA_MOD;
701 else if (! strcmp(op, "||"))
702 return SDB_DATA_CONCAT;
703 return -1;
704 } /* sdb_data_parse_op */
706 int
707 sdb_data_expr_eval(int op, const sdb_data_t *d1, const sdb_data_t *d2,
708 sdb_data_t *res)
709 {
710 if ((! d1) || (! d2) || (! res))
711 return -1;
712 if (sdb_data_isnull(d1) || sdb_data_isnull(d2)) {
713 *res = SDB_DATA_NULL;
714 return 0;
715 }
716 switch (op) {
717 case SDB_DATA_CONCAT: return data_concat(d1, d2, res);
718 case SDB_DATA_ADD: return data_lin(d1, 1, d2, res);
719 case SDB_DATA_SUB: return data_lin(d1, -1, d2, res);
720 case SDB_DATA_MUL: return data_mul(d1, d2, res);
721 case SDB_DATA_DIV: return data_div(d1, d2, res, NULL);
722 case SDB_DATA_MOD: return data_div(d1, d2, NULL, res);
723 }
724 return -1;
725 } /* sdb_data_expr_eval */
727 int
728 sdb_data_expr_type(int op, int type1, int type2)
729 {
730 int types_num = (int)SDB_STATIC_ARRAY_LEN(op_matrix[0]);
732 assert(SDB_STATIC_ARRAY_LEN(op_matrix[0])
733 == SDB_STATIC_ARRAY_LEN(op_matrix[0][0]));
735 if ((op <= 0) || (SDB_STATIC_ARRAY_LEN(op_matrix) < (size_t)op))
736 return -1;
738 /* arrays only support concat; type has to match */
739 if ((type1 & SDB_TYPE_ARRAY) || (type2 & SDB_TYPE_ARRAY)) {
740 if ((type1 != type2) || (op != SDB_DATA_CONCAT))
741 return -1;
742 return type1;
743 }
744 if ((type1 < 0) || (types_num < type1)
745 || (type2 < 0) || (types_num < type2))
746 return -1;
748 if ((type1 == SDB_TYPE_NULL) || (type2 == SDB_TYPE_NULL))
749 return SDB_TYPE_NULL;
750 return op_matrix[op - 1][type1 - 1][type2 - 1];
751 } /* sdb_data_expr_type */
753 size_t
754 sdb_data_strlen(const sdb_data_t *datum)
755 {
756 if (! datum)
757 return 0;
759 if (datum->type == SDB_TYPE_INTEGER) {
760 /* log(64) */
761 return 20;
762 }
763 else if (datum->type == SDB_TYPE_DECIMAL) {
764 /* XXX: -d.dddddde+dd or -ddddd.dddddd */
765 return 42;
766 }
767 else if (datum->type == SDB_TYPE_STRING) {
768 if (! datum->data.string)
769 return 6; /* NULL */
770 /* in the worst case, each character needs to be escaped */
771 return 2 * strlen(datum->data.string) + 2;
772 }
773 else if (datum->type == SDB_TYPE_DATETIME) {
774 /* "YYYY-MM-DD HH:MM:SS +zzzz" */
775 return 27;
776 }
777 else if (datum->type == SDB_TYPE_BINARY) {
778 if (! datum->data.binary.datum)
779 return 6; /* NULL */
780 /* "\xNN" */
781 return 4 * datum->data.binary.length + 2;
782 }
783 else if (datum->type == SDB_TYPE_REGEX) {
784 if (! datum->data.re.raw)
785 return 6; /* NULL */
786 /* "/.../" */
787 return strlen(datum->data.re.raw) + 4;
788 }
789 else if (datum->type & SDB_TYPE_ARRAY) {
790 size_t len = 2; /* [] */
791 size_t i;
792 for (i = 0; i < datum->data.array.length; ++i) {
793 sdb_data_t v = SDB_DATA_INIT;
794 sdb_data_array_get(datum, i, &v);
795 len += sdb_data_strlen(&v) + 1;
796 }
797 return len;
798 }
799 return 0;
800 } /* sdb_data_strlen */
802 int
803 sdb_data_format(const sdb_data_t *datum, char *buf, size_t buflen, int quoted)
804 {
805 char tmp[sdb_data_strlen(datum) + 1];
806 char *data = NULL;
807 _Bool is_null = 0;
808 int ret = -1;
810 size_t i, pos;
812 if ((! datum) || (! buf) || (! buflen))
813 return -1;
815 if (datum->type == SDB_TYPE_INTEGER) {
816 ret = snprintf(buf, buflen, "%"PRIi64, datum->data.integer);
817 }
818 else if (datum->type == SDB_TYPE_DECIMAL) {
819 ret = snprintf(buf, buflen, "%g", datum->data.decimal);
820 }
821 else if (datum->type == SDB_TYPE_STRING) {
822 if (! datum->data.string)
823 is_null = 1;
824 else {
825 pos = 0;
826 for (i = 0; i < strlen(datum->data.string); ++i) {
827 char byte = datum->data.string[i];
829 if ((byte == '\\') || (byte == '"')) {
830 tmp[pos] = '\\';
831 ++pos;
832 }
833 tmp[pos] = byte;
834 ++pos;
835 }
836 tmp[pos] = '\0';
837 data = tmp;
838 }
839 }
840 else if (datum->type == SDB_TYPE_DATETIME) {
841 if (! sdb_strftime(tmp, sizeof(tmp), "%F %T %z",
842 datum->data.datetime))
843 return -1;
844 tmp[sizeof(tmp) - 1] = '\0';
845 data = tmp;
846 }
847 else if (datum->type == SDB_TYPE_BINARY) {
848 pos = 0;
849 for (i = 0; i < datum->data.binary.length; ++i) {
850 int byte = (int)datum->data.binary.datum[i];
851 char hex[] = {'0', '1', '2', '3', '4', '5', '6', '7',
852 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
854 tmp[pos] = '\\';
855 tmp[pos + 1] = 'x';
856 pos += 2;
858 if (byte > 0xf) {
859 tmp[pos] = hex[byte >> 4];
860 ++pos;
861 }
862 tmp[pos] = hex[byte & 0xf];
863 ++pos;
864 }
865 if (datum->data.binary.datum) {
866 tmp[pos] = '\0';
867 data = tmp;
868 }
869 else
870 is_null = 1;
871 }
872 else if (datum->type == SDB_TYPE_REGEX) {
873 if (! datum->data.re.raw)
874 is_null = 1;
875 else {
876 snprintf(tmp, sizeof(tmp), "/%s/", datum->data.re.raw);
877 data = tmp;
878 }
879 }
880 else if (datum->type & SDB_TYPE_ARRAY) {
881 ret = 1;
882 buf[0] = '[';
883 for (i = 0; i < datum->data.array.length; ++i) {
884 sdb_data_t v = SDB_DATA_INIT;
885 int n;
886 if ((size_t)ret >= buflen - 1)
887 break;
889 if (ret > 1) {
890 buf[ret] = ',';
891 buf[ret + 1] = ' ';
892 ret += 2;
893 }
895 sdb_data_array_get(datum, i, &v);
896 n = sdb_data_format(&v, buf + ret, buflen - ret, quoted);
897 if (n > 0)
898 ret += n;
899 else
900 break;
901 }
902 if ((size_t)ret < buflen - 1) {
903 buf[ret] = ']';
904 buf[ret + 1] = '\0';
905 ++ret;
906 }
907 }
909 if (is_null) {
910 /* never quote NULL */
911 strncpy(buf, "NULL", buflen);
912 ret = (int)SDB_MIN(buflen, 4);
913 }
914 else if (data) {
915 if (quoted == SDB_UNQUOTED)
916 ret = snprintf(buf, buflen, "%s", data);
917 else if (quoted == SDB_SINGLE_QUOTED)
918 ret = snprintf(buf, buflen, "'%s'", data);
919 else
920 ret = snprintf(buf, buflen, "\"%s\"", data);
921 }
922 buf[buflen - 1] = '\0';
923 return ret;
924 } /* sdb_data_format */
926 int
927 sdb_data_parse(char *str, int type, sdb_data_t *data)
928 {
929 sdb_data_t tmp;
931 char *endptr = NULL;
933 errno = 0;
934 if (type == SDB_TYPE_INTEGER) {
935 tmp.data.integer = strtoll(str, &endptr, 0);
936 }
937 else if (type == SDB_TYPE_DECIMAL) {
938 tmp.data.decimal = strtod(str, &endptr);
939 }
940 else if (type == SDB_TYPE_STRING) {
941 tmp.data.string = str;
942 }
943 else if (type == SDB_TYPE_DATETIME) {
944 double datetime = strtod(str, &endptr);
945 tmp.data.datetime = DOUBLE_TO_SDB_TIME(datetime);
946 }
947 else if (type == SDB_TYPE_BINARY) {
948 /* we don't support any binary information containing 0-bytes */
949 tmp.data.binary.length = strlen(str);
950 tmp.data.binary.datum = (unsigned char *)str;
951 }
952 else if (type == SDB_TYPE_REGEX) {
953 tmp.data.re.raw = strdup(str);
954 if (! tmp.data.re.raw)
955 return -1;
956 if (regcomp(&tmp.data.re.regex, tmp.data.re.raw,
957 REG_EXTENDED | REG_ICASE | REG_NOSUB)) {
958 sdb_log(SDB_LOG_ERR, "core: Failed to compile regular "
959 "expression '%s'", tmp.data.re.raw);
960 free(tmp.data.re.raw);
961 return -1;
962 }
963 if (! data) {
964 tmp.type = SDB_TYPE_REGEX;
965 sdb_data_free_datum(&tmp);
966 }
967 }
968 else if (type & SDB_TYPE_ARRAY) {
969 /* TODO */
970 errno = ENOTSUP;
971 return -1;
972 }
973 else {
974 errno = EINVAL;
975 return -1;
976 }
978 if ((type == SDB_TYPE_INTEGER) || (type == SDB_TYPE_DECIMAL)
979 || (type == SDB_TYPE_DATETIME)) {
980 if (errno || (str == endptr)) {
981 char errbuf[1024];
982 sdb_log(SDB_LOG_ERR, "core: Failed to parse string "
983 "'%s' as numeric value (type %i): %s", str, type,
984 sdb_strerror(errno, errbuf, sizeof(errbuf)));
985 return -1;
986 }
987 else if (endptr && (*endptr != '\0'))
988 sdb_log(SDB_LOG_WARNING, "core: Ignoring garbage after "
989 "number while parsing numeric value (type %i): %s.",
990 type, endptr);
991 }
993 if (data) {
994 *data = tmp;
995 data->type = type;
996 }
997 return 0;
998 } /* sdb_data_parse */
1000 size_t
1001 sdb_data_sizeof(int type)
1002 {
1003 sdb_data_t v;
1004 if (type == SDB_TYPE_INTEGER)
1005 return sizeof(v.data.integer);
1006 else if (type == SDB_TYPE_DECIMAL)
1007 return sizeof(v.data.decimal);
1008 else if (type == SDB_TYPE_STRING)
1009 return sizeof(v.data.string);
1010 else if (type == SDB_TYPE_DATETIME)
1011 return sizeof(v.data.datetime);
1012 else if (type == SDB_TYPE_BINARY)
1013 return sizeof(v.data.binary);
1014 else if (type == SDB_TYPE_REGEX)
1015 return sizeof(v.data.re);
1016 return 0;
1017 } /* sdb_data_sizeof */
1019 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */