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 if ((datum->type & SDB_TYPE_ARRAY) && (! datum->data.array.values))
611 return 1;
612 return 0;
613 } /* sdb_data_isnull */
615 _Bool
616 sdb_data_inarray(const sdb_data_t *value, const sdb_data_t *array)
617 {
618 size_t i;
620 if (sdb_data_isnull(value) || sdb_data_isnull(array))
621 return 0;
622 if ((value->type & SDB_TYPE_ARRAY) || (! (array->type & SDB_TYPE_ARRAY)))
623 return 0;
624 if (value->type != (array->type & 0xff))
625 return 0;
627 if (value->type == SDB_TYPE_INTEGER) {
628 int64_t *v = array->data.array.values;
629 for (i = 0; i < array->data.array.length; ++i)
630 if (value->data.integer == v[i])
631 return 1;
632 }
633 else if (value->type == SDB_TYPE_DECIMAL) {
634 double *v = array->data.array.values;
635 for (i = 0; i < array->data.array.length; ++i)
636 if (value->data.decimal == v[i])
637 return 1;
638 }
639 else if (value->type == SDB_TYPE_STRING) {
640 char **v = array->data.array.values;
641 for (i = 0; i < array->data.array.length; ++i)
642 if (!strcasecmp(value->data.string, v[i]))
643 return 1;
644 }
645 else {
646 /* TODO */
647 errno = ENOTSUP;
648 return 0;
649 }
650 return 0;
651 } /* sdb_data_inarray */
653 int
654 sdb_data_parse_op(const char *op)
655 {
656 if (! strcmp(op, "+"))
657 return SDB_DATA_ADD;
658 else if (! strcmp(op, "-"))
659 return SDB_DATA_SUB;
660 else if (! strcmp(op, "*"))
661 return SDB_DATA_MUL;
662 else if (! strcmp(op, "/"))
663 return SDB_DATA_DIV;
664 else if (! strcmp(op, "%"))
665 return SDB_DATA_MOD;
666 else if (! strcmp(op, "||"))
667 return SDB_DATA_CONCAT;
668 return -1;
669 } /* sdb_data_parse_op */
671 int
672 sdb_data_expr_eval(int op, const sdb_data_t *d1, const sdb_data_t *d2,
673 sdb_data_t *res)
674 {
675 if ((! d1) || (! d2) || (! res))
676 return -1;
677 if (sdb_data_isnull(d1) || sdb_data_isnull(d2)) {
678 *res = SDB_DATA_NULL;
679 return 0;
680 }
681 switch (op) {
682 case SDB_DATA_CONCAT:
683 return data_concat(d1, d2, res);
684 case SDB_DATA_ADD:
685 return data_lin(d1, 1, d2, res);
686 case SDB_DATA_SUB:
687 return data_lin(d1, -1, d2, res);
688 case SDB_DATA_MUL:
689 return data_mul(d1, d2, res);
690 case SDB_DATA_DIV:
691 return data_div(d1, d2, res, NULL);
692 case SDB_DATA_MOD:
693 return data_div(d1, d2, NULL, res);
694 }
695 return -1;
696 } /* sdb_data_expr_eval */
698 int
699 sdb_data_expr_type(int op, int type1, int type2)
700 {
701 int types_num = (int)SDB_STATIC_ARRAY_LEN(op_matrix[0]);
703 assert(SDB_STATIC_ARRAY_LEN(op_matrix[0])
704 == SDB_STATIC_ARRAY_LEN(op_matrix[0][0]));
706 if ((op <= 0) || (SDB_STATIC_ARRAY_LEN(op_matrix) < (size_t)op))
707 return -1;
709 /* arrays only support concat; type has to match */
710 if ((type1 & SDB_TYPE_ARRAY) || (type2 & SDB_TYPE_ARRAY)) {
711 if ((type1 != type2) || (op != SDB_DATA_CONCAT))
712 return -1;
713 return type1;
714 }
715 if ((type1 < 0) || (types_num < type1)
716 || (type2 < 0) || (types_num < type2))
717 return -1;
719 if ((type1 == SDB_TYPE_NULL) || (type2 == SDB_TYPE_NULL))
720 return SDB_TYPE_NULL;
721 return op_matrix[op - 1][type1 - 1][type2 - 1];
722 } /* sdb_data_expr_type */
724 size_t
725 sdb_data_strlen(const sdb_data_t *datum)
726 {
727 if (! datum)
728 return 0;
730 if (datum->type == SDB_TYPE_INTEGER) {
731 /* log(64) */
732 return 20;
733 }
734 else if (datum->type == SDB_TYPE_DECIMAL) {
735 /* XXX: -d.dddddde+dd or -ddddd.dddddd */
736 return 42;
737 }
738 else if (datum->type == SDB_TYPE_STRING) {
739 if (! datum->data.string)
740 return 6; /* NULL */
741 /* in the worst case, each character needs to be escaped */
742 return 2 * strlen(datum->data.string) + 2;
743 }
744 else if (datum->type == SDB_TYPE_DATETIME) {
745 /* "YYYY-MM-DD HH:MM:SS +zzzz" */
746 return 27;
747 }
748 else if (datum->type == SDB_TYPE_BINARY) {
749 if (! datum->data.binary.datum)
750 return 6; /* NULL */
751 /* "\xNN" */
752 return 4 * datum->data.binary.length + 2;
753 }
754 else if (datum->type == SDB_TYPE_REGEX) {
755 if (! datum->data.re.raw)
756 return 6; /* NULL */
757 /* "/.../" */
758 return strlen(datum->data.re.raw) + 4;
759 }
760 else if (datum->type & SDB_TYPE_ARRAY) {
761 /* TODO */
762 errno = ENOTSUP;
763 return 0;
764 }
765 return 0;
766 } /* sdb_data_strlen */
768 int
769 sdb_data_format(const sdb_data_t *datum, char *buf, size_t buflen, int quoted)
770 {
771 char tmp[sdb_data_strlen(datum) + 1];
772 char *data = NULL;
773 _Bool is_null = 0;
774 int ret = -1;
776 size_t i, pos;
778 if ((! datum) || (! buf))
779 return -1;
781 if (datum->type == SDB_TYPE_INTEGER) {
782 ret = snprintf(buf, buflen, "%"PRIi64, datum->data.integer);
783 }
784 else if (datum->type == SDB_TYPE_DECIMAL) {
785 ret = snprintf(buf, buflen, "%g", datum->data.decimal);
786 }
787 else if (datum->type == SDB_TYPE_STRING) {
788 if (! datum->data.string)
789 is_null = 1;
790 else {
791 pos = 0;
792 for (i = 0; i < strlen(datum->data.string); ++i) {
793 char byte = datum->data.string[i];
795 if ((byte == '\\') || (byte == '"')) {
796 tmp[pos] = '\\';
797 ++pos;
798 }
799 tmp[pos] = byte;
800 ++pos;
801 }
802 tmp[pos] = '\0';
803 data = tmp;
804 }
805 }
806 else if (datum->type == SDB_TYPE_DATETIME) {
807 if (! sdb_strftime(tmp, sizeof(tmp), "%F %T %z",
808 datum->data.datetime))
809 return -1;
810 tmp[sizeof(tmp) - 1] = '\0';
811 data = tmp;
812 }
813 else if (datum->type == SDB_TYPE_BINARY) {
814 pos = 0;
815 for (i = 0; i < datum->data.binary.length; ++i) {
816 int byte = (int)datum->data.binary.datum[i];
817 char hex[] = {'0', '1', '2', '3', '4', '5', '6', '7',
818 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
820 tmp[pos] = '\\';
821 tmp[pos + 1] = 'x';
822 pos += 2;
824 if (byte > 0xf) {
825 tmp[pos] = hex[byte >> 4];
826 ++pos;
827 }
828 tmp[pos] = hex[byte & 0xf];
829 ++pos;
830 }
831 if (datum->data.binary.datum) {
832 tmp[pos] = '\0';
833 data = tmp;
834 }
835 else
836 is_null = 1;
837 }
838 else if (datum->type == SDB_TYPE_REGEX) {
839 if (! datum->data.re.raw)
840 is_null = 1;
841 else {
842 snprintf(tmp, sizeof(tmp), "/%s/", datum->data.re.raw);
843 data = tmp;
844 }
845 }
846 else if (datum->type & SDB_TYPE_ARRAY) {
847 /* TODO */
848 errno = ENOTSUP;
849 return -1;
850 }
852 if (is_null) {
853 /* never quote NULL */
854 strncpy(buf, "NULL", buflen);
855 ret = (int)SDB_MIN(buflen, 4);
856 }
857 else if (data) {
858 if (quoted == SDB_UNQUOTED)
859 ret = snprintf(buf, buflen, "%s", data);
860 else if (quoted == SDB_SINGLE_QUOTED)
861 ret = snprintf(buf, buflen, "'%s'", data);
862 else
863 ret = snprintf(buf, buflen, "\"%s\"", data);
864 }
865 buf[buflen - 1] = '\0';
866 return ret;
867 } /* sdb_data_format */
869 int
870 sdb_data_parse(char *str, int type, sdb_data_t *data)
871 {
872 sdb_data_t tmp;
874 char *endptr = NULL;
876 errno = 0;
877 if (type == SDB_TYPE_INTEGER) {
878 tmp.data.integer = strtoll(str, &endptr, 0);
879 }
880 else if (type == SDB_TYPE_DECIMAL) {
881 tmp.data.decimal = strtod(str, &endptr);
882 }
883 else if (type == SDB_TYPE_STRING) {
884 tmp.data.string = str;
885 }
886 else if (type == SDB_TYPE_DATETIME) {
887 double datetime = strtod(str, &endptr);
888 tmp.data.datetime = DOUBLE_TO_SDB_TIME(datetime);
889 }
890 else if (type == SDB_TYPE_BINARY) {
891 /* we don't support any binary information containing 0-bytes */
892 tmp.data.binary.length = strlen(str);
893 tmp.data.binary.datum = (unsigned char *)str;
894 }
895 else if (type == SDB_TYPE_REGEX) {
896 tmp.data.re.raw = strdup(str);
897 if (! tmp.data.re.raw)
898 return -1;
899 if (regcomp(&tmp.data.re.regex, tmp.data.re.raw,
900 REG_EXTENDED | REG_ICASE | REG_NOSUB)) {
901 sdb_log(SDB_LOG_ERR, "core: Failed to compile regular "
902 "expression '%s'", tmp.data.re.raw);
903 free(tmp.data.re.raw);
904 return -1;
905 }
906 if (! data) {
907 tmp.type = SDB_TYPE_REGEX;
908 sdb_data_free_datum(&tmp);
909 }
910 }
911 else if (type & SDB_TYPE_ARRAY) {
912 /* TODO */
913 errno = ENOTSUP;
914 return -1;
915 }
916 else {
917 errno = EINVAL;
918 return -1;
919 }
921 if ((type == SDB_TYPE_INTEGER) || (type == SDB_TYPE_DECIMAL)
922 || (type == SDB_TYPE_DATETIME)) {
923 if (errno || (str == endptr)) {
924 char errbuf[1024];
925 sdb_log(SDB_LOG_ERR, "core: Failed to parse string "
926 "'%s' as numeric value (type %i): %s", str, type,
927 sdb_strerror(errno, errbuf, sizeof(errbuf)));
928 return -1;
929 }
930 else if (endptr && (*endptr != '\0'))
931 sdb_log(SDB_LOG_WARNING, "core: Ignoring garbage after "
932 "number while parsing numeric value (type %i): %s.",
933 type, endptr);
934 }
936 if (data) {
937 *data = tmp;
938 data->type = type;
939 }
940 return 0;
941 } /* sdb_data_parse */
943 size_t
944 sdb_data_sizeof(int type)
945 {
946 sdb_data_t v;
947 if (type == SDB_TYPE_INTEGER)
948 return sizeof(v.data.integer);
949 else if (type == SDB_TYPE_DECIMAL)
950 return sizeof(v.data.decimal);
951 else if (type == SDB_TYPE_STRING)
952 return sizeof(v.data.string);
953 else if (type == SDB_TYPE_DATETIME)
954 return sizeof(v.data.datetime);
955 else if (type == SDB_TYPE_BINARY)
956 return sizeof(v.data.binary);
957 else if (type == SDB_TYPE_REGEX)
958 return sizeof(v.data.re);
959 return 0;
960 } /* sdb_data_sizeof */
962 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */