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1/*
2 This file is part of GNUnet
3 Copyright (C) 2014, 2015, 2016 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20/**
21 * @file my/my_result_helper.c
22 * @brief functions to extract result values
23 * @author Christophe Genevey
24 */
25
26#include "platform.h"
27#include "gnunet_util_lib.h"
28#include "gnunet_my_lib.h"
29
30
31/**
32 * extract data from a Mysql database @a result at row @a row
33 *
34 * @param cls closure
35 * @param[in,out] rs
36 * @param stmt the mysql statement that is being run
37 * @param column the column that is being processed
38 * @param[out] result mysql result
39 * @return
40 * #GNUNET_OK if all results could be extracted
41 * #GNUNET_SYSERR if a result was invalid
42 */
43static int
44pre_extract_varsize_blob (void *cls,
45 struct GNUNET_MY_ResultSpec *rs,
46 MYSQL_STMT *stmt,
47 unsigned int column,
48 MYSQL_BIND *results)
49{
50 results[0].buffer = NULL;
51 results[0].buffer_length = 0;
52 results[0].length = &rs->mysql_bind_output_length;
53 results[0].is_null = &rs->is_null;
54 rs->is_null = 0;
55
56 return GNUNET_OK;
57}
58
59
60/**
61 * extract data from a Mysql database @a result at row @a row
62 *
63 * @param cls closure
64 * @param[in,out] rs
65 * @param stmt the mysql statement that is being run
66 * @param column the column that is being processed
67 * @param[out] results
68 * @return
69 * #GNUNET_OK if all results could be extracted
70 * #GNUNET_SYSERR if a result was invalid
71 */
72static int
73post_extract_varsize_blob (void *cls,
74 struct GNUNET_MY_ResultSpec *rs,
75 MYSQL_STMT *stmt,
76 unsigned int column,
77 MYSQL_BIND *results)
78{
79 void *buf;
80 size_t size;
81
82 if (*results->is_null)
83 return GNUNET_SYSERR;
84 size = (size_t) rs->mysql_bind_output_length;
85
86 if (rs->mysql_bind_output_length != size)
87 return GNUNET_SYSERR; /* 'unsigned long' does not fit in size_t!? */
88
89 buf = GNUNET_malloc (size);
90
91 results[0].buffer = buf;
92 results[0].buffer_length = size;
93 results[0].buffer_type = MYSQL_TYPE_BLOB;
94
95 if (0 !=
96 mysql_stmt_fetch_column (stmt,
97 results,
98 column,
99 0))
100 {
101 GNUNET_free (buf);
102 return GNUNET_SYSERR;
103 }
104
105 *(void **) rs->dst = buf;
106 *rs->result_size = size;
107
108 return GNUNET_OK;
109}
110
111
112/**
113 * extract data from a Mysql database @a result at row @a row
114 *
115 * @param cls closure
116 * @param[in,out] rs
117 */
118static void
119cleanup_varsize_blob (void *cls,
120 struct GNUNET_MY_ResultSpec *rs)
121{
122 void **ptr = (void **) rs->dst;
123
124 if (NULL != *ptr)
125 {
126 GNUNET_free (*ptr);
127 *ptr = NULL;
128 }
129}
130
131
132/**
133 * Variable-size result expected
134 *
135 * @param[out] dst where to store the result, allocated
136 * @param[out] ptr_size where to store the size of @a dst
137 * @return array entru for the result specification to use
138 */
139struct GNUNET_MY_ResultSpec
140GNUNET_MY_result_spec_variable_size (void **dst,
141 size_t *ptr_size)
142{
143 struct GNUNET_MY_ResultSpec res = {
144 .pre_conv = &pre_extract_varsize_blob,
145 .post_conv = &post_extract_varsize_blob,
146 .cleaner = &cleanup_varsize_blob,
147 .dst = (void *) (dst),
148 .result_size = ptr_size,
149 .num_fields = 1
150 };
151
152 return res;
153}
154
155
156/**
157 * Extract data from a Mysql database @a result at row @a row
158 *
159 * @param cls closure
160 * @param[in,out] rs
161 * @param stmt the mysql statement that is being run
162 * @param column the column that is being processed
163 * @param[out] results
164 * @return
165 * #GNUNET_OK if all results could be extracted
166 * #GNUNET_SYSERR if a result was invalid(non-existing field or NULL)
167 */
168static int
169pre_extract_fixed_blob (void *cls,
170 struct GNUNET_MY_ResultSpec *rs,
171 MYSQL_STMT *stmt,
172 unsigned int column,
173 MYSQL_BIND *results)
174{
175 results[0].buffer = rs->dst;
176 results[0].buffer_length = rs->dst_size;
177 results[0].length = &rs->mysql_bind_output_length;
178 results[0].buffer_type = MYSQL_TYPE_BLOB;
179 results[0].is_null = &rs->is_null;
180 rs->is_null = 0;
181
182 return GNUNET_OK;
183}
184
185
186/**
187 * Check size of extracted fixed size data from a Mysql database @a
188 * result at row @a row
189 *
190 * @param cls closure
191 * @param[in,out] rs
192 * @param stmt the mysql statement that is being run
193 * @param column the column that is being processed
194 * @param[out] results
195 * @return
196 * #GNUNET_OK if all results could be extracted
197 * #GNUNET_SYSERR if a result was invalid(non-existing field or NULL)
198 */
199static int
200post_extract_fixed_blob (void *cls,
201 struct GNUNET_MY_ResultSpec *rs,
202 MYSQL_STMT *stmt,
203 unsigned int column,
204 MYSQL_BIND *results)
205{
206 if (*results->is_null)
207 return GNUNET_SYSERR;
208 if (rs->dst_size != rs->mysql_bind_output_length)
209 return GNUNET_SYSERR;
210 return GNUNET_OK;
211}
212
213
214/**
215 * Fixed-size result expected.
216 *
217 * @param name name of the field in the table
218 * @param[out] dst where to store the result
219 * @param ptr_size number of bytes in @a dst
220 * @return array entry for the result specification to use
221 */
222struct GNUNET_MY_ResultSpec
223GNUNET_MY_result_spec_fixed_size (void *ptr,
224 size_t ptr_size)
225{
226 struct GNUNET_MY_ResultSpec res = {
227 .pre_conv = &pre_extract_fixed_blob,
228 .post_conv = &post_extract_fixed_blob,
229 .cleaner = NULL,
230 .dst = (void *) (ptr),
231 .dst_size = ptr_size,
232 .num_fields = 1
233 };
234
235 return res;
236}
237
238
239/**
240 * Extract data from a Mysql database @a result at row @a row
241 *
242 * @param cls closure
243 * @param[in,out] rs
244 * @param stmt the mysql statement that is being run
245 * @param column the column that is being processed
246 * @param[out] results
247 * @return
248 * #GNUNET_OK if all results could be extracted
249 * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
250 */
251static int
252pre_extract_rsa_public_key (void *cls,
253 struct GNUNET_MY_ResultSpec *rs,
254 MYSQL_STMT *stmt,
255 unsigned int column,
256 MYSQL_BIND *results)
257{
258 results[0].buffer = NULL;
259 results[0].buffer_length = 0;
260 results[0].length = &rs->mysql_bind_output_length;
261 results[0].buffer_type = MYSQL_TYPE_BLOB;
262 results[0].is_null = &rs->is_null;
263 rs->is_null = 0;
264
265 return GNUNET_OK;
266}
267
268
269/**
270 * Check size of extracted fixed size data from a Mysql database @a
271 * result at row @a row
272 *
273 * @param cls closure
274 * @param[in,out] rs
275 * @param stmt the mysql statement that is being run
276 * @param column the column that is being processed
277 * @param[out] results
278 * @return
279 * #GNUNET_OK if all results could be extracted
280 * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
281 */
282static int
283post_extract_rsa_public_key (void *cls,
284 struct GNUNET_MY_ResultSpec *rs,
285 MYSQL_STMT *stmt,
286 unsigned int column,
287 MYSQL_BIND *results)
288
289{
290 struct GNUNET_CRYPTO_RsaPublicKey **pk = rs->dst;
291 void *buf;
292 size_t size;
293
294 if (*results->is_null)
295 return GNUNET_SYSERR;
296 size = (size_t) rs->mysql_bind_output_length;
297
298 if (rs->mysql_bind_output_length != size)
299 return GNUNET_SYSERR; /* 'unsigned long' does not fit in size_t!? */
300 buf = GNUNET_malloc (size);
301
302 results[0].buffer = buf;
303 results[0].buffer_length = size;
304 results[0].buffer_type = MYSQL_TYPE_BLOB;
305 if (0 !=
306 mysql_stmt_fetch_column (stmt,
307 results,
308 column,
309 0))
310 {
311 GNUNET_free (buf);
312 return GNUNET_SYSERR;
313 }
314
315 *pk = GNUNET_CRYPTO_rsa_public_key_decode (buf,
316 size);
317 GNUNET_free (buf);
318 if (NULL == *pk)
319 {
320 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
321 "Results contains bogus public key value (fail to decode)\n");
322 return GNUNET_SYSERR;
323 }
324
325 return GNUNET_OK;
326}
327
328
329/**
330 * Function called to clean up memory allocated
331 * by a #GNUNET_MY_ResultConverter.
332 *
333 * @param cls closure
334 * @param rs result data to clean up
335 */
336static void
337clean_rsa_public_key (void *cls,
338 struct GNUNET_MY_ResultSpec *rs)
339{
340 struct GNUNET_CRYPTO_RsaPublicKey **pk = rs->dst;
341
342 if (NULL != *pk)
343 {
344 GNUNET_CRYPTO_rsa_public_key_free (*pk);
345 *pk = NULL;
346 }
347}
348
349
350/**
351 * RSA public key expected
352 *
353 * @param name name of the field in the table
354 * @param[out] rsa where to store the result
355 * @return array entry for the result specification to use
356 */
357struct GNUNET_MY_ResultSpec
358GNUNET_MY_result_spec_rsa_public_key (struct GNUNET_CRYPTO_RsaPublicKey **rsa)
359{
360 struct GNUNET_MY_ResultSpec res = {
361 .pre_conv = &pre_extract_rsa_public_key,
362 .post_conv = &post_extract_rsa_public_key,
363 .cleaner = &clean_rsa_public_key,
364 .dst = (void *) rsa,
365 .dst_size = 0,
366 .num_fields = 1
367 };
368
369 return res;
370}
371
372
373/**
374 * Extract data from a Mysql database @a result at row @a row.
375 *
376 * @param cls closure
377 * @param[in,out] rs
378 * @param stmt the mysql statement that is being run
379 * @param column the column that is being processed
380 * @param[out] results
381 * @return
382 * #GNUNET_OK if all results could be extracted
383 * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
384 */
385static int
386pre_extract_rsa_signature (void *cls,
387 struct GNUNET_MY_ResultSpec *rs,
388 MYSQL_STMT *stmt,
389 unsigned int column,
390 MYSQL_BIND *results)
391{
392 results[0].buffer = 0;
393 results[0].buffer_length = 0;
394 results[0].length = &rs->mysql_bind_output_length;
395 results[0].buffer_type = MYSQL_TYPE_BLOB;
396 results[0].is_null = &rs->is_null;
397 rs->is_null = 0;
398
399 return GNUNET_OK;
400}
401
402
403/**
404 * Extract data from a Mysql database @a result at row @a row.
405 *
406 * @param cls closure
407 * @param[in,out] rs
408 * @param stmt the mysql statement that is being run
409 * @param column the column that is being processed
410 * @param[out] results
411 * @return
412 * #GNUNET_OK if all results could be extracted
413 * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
414 */
415static int
416post_extract_rsa_signature (void *cls,
417 struct GNUNET_MY_ResultSpec *rs,
418 MYSQL_STMT *stmt,
419 unsigned int column,
420 MYSQL_BIND *results)
421{
422 struct GNUNET_CRYPTO_RsaSignature **sig = rs->dst;
423 void *buf;
424 size_t size;
425
426 if (*results->is_null)
427 return GNUNET_SYSERR;
428 size = (size_t) rs->mysql_bind_output_length;
429
430 if (rs->mysql_bind_output_length != size)
431 return GNUNET_SYSERR; /* 'unsigned long' does not fit in size_t!? */
432 buf = GNUNET_malloc (size);
433
434 results[0].buffer = buf;
435 results[0].buffer_length = size;
436 results[0].buffer_type = MYSQL_TYPE_BLOB;
437 if (0 !=
438 mysql_stmt_fetch_column (stmt,
439 results,
440 column,
441 0))
442 {
443 GNUNET_free (buf);
444 return GNUNET_SYSERR;
445 }
446
447 *sig = GNUNET_CRYPTO_rsa_signature_decode (buf,
448 size);
449 GNUNET_free (buf);
450 if (NULL == *sig)
451 {
452 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
453 "Resuls contains bogus signature value (fails to decode)\n");
454 return GNUNET_SYSERR;
455 }
456 return GNUNET_OK;
457}
458
459
460/**
461 * Function called to clean up memory allocated
462 * by a #GNUNET_MY_ResultConverter.
463 *
464 * @param cls closure
465 * @param rd result data to clean up
466 */
467static void
468clean_rsa_signature (void *cls,
469 struct GNUNET_MY_ResultSpec *rs)
470{
471 struct GNUNET_CRYPTO_RsaSignature **sig = rs->dst;
472
473 if (NULL != *sig)
474 {
475 GNUNET_CRYPTO_rsa_signature_free (*sig);
476 *sig = NULL;
477 }
478}
479
480
481/**
482 * RSA signature expected.
483 *
484 * @param[out] sig where to store the result;
485 * @return array entry for the result specification to use
486 */
487struct GNUNET_MY_ResultSpec
488GNUNET_MY_result_spec_rsa_signature (struct GNUNET_CRYPTO_RsaSignature **sig)
489{
490 struct GNUNET_MY_ResultSpec res = {
491 .pre_conv = &pre_extract_rsa_signature,
492 .post_conv = &post_extract_rsa_signature,
493 .cleaner = &clean_rsa_signature,
494 .dst = (void *) sig,
495 .dst_size = 0,
496 .num_fields = 1
497 };
498
499 return res;
500}
501
502
503/**
504 * Extract data from a Mysql database @a result at row @a row
505 *
506 * @param cls closure
507 * @param[in,out] rs
508 * @param stmt the mysql statement that is being run
509 * @param column the column that is being processed
510 * @param[out] results
511 * @return
512 * #GNUNET_OK if all results could be extracted
513 * #GNUNET_SYSERR if a result was invalid (non existing field or NULL)
514 */
515static int
516pre_extract_string (void *cls,
517 struct GNUNET_MY_ResultSpec *rs,
518 MYSQL_STMT *stmt,
519 unsigned int column,
520 MYSQL_BIND *results)
521{
522 results[0].buffer = NULL;
523 results[0].buffer_length = 0;
524 results[0].length = &rs->mysql_bind_output_length;
525 results[0].buffer_type = MYSQL_TYPE_BLOB;
526 results[0].is_null = &rs->is_null;
527 rs->is_null = 0;
528
529 return GNUNET_OK;
530}
531
532
533/**
534 * Check size of extracted fixed size data from a Mysql database @a
535 *
536 * @param cls closure
537 * @param[in,out] rs
538 * @param stmt the mysql statement that is being run
539 * @param column the column that is being processed
540 * @param[out] results
541 * @return
542 * #GNUNET_OK if all results could be extracted
543 * #GNUNET_SYSERR if a result was invalid (non existing field or NULL)
544 */
545static int
546post_extract_string (void *cls,
547 struct GNUNET_MY_ResultSpec *rs,
548 MYSQL_STMT *stmt,
549 unsigned int column,
550 MYSQL_BIND *results)
551{
552 size_t size = (size_t) rs->mysql_bind_output_length;
553 char *buf;
554
555 if (rs->mysql_bind_output_length != size)
556 return GNUNET_SYSERR;
557 if (*results->is_null)
558 {
559 *(void **) rs->dst = NULL;
560 return GNUNET_OK;
561 }
562
563 buf = GNUNET_malloc (size);
564 results[0].buffer = buf;
565 results[0].buffer_length = size;
566 results[0].buffer_type = MYSQL_TYPE_BLOB;
567
568 if (0 !=
569 mysql_stmt_fetch_column (stmt,
570 results,
571 column,
572 0))
573 {
574 GNUNET_free (buf);
575 return GNUNET_SYSERR;
576 }
577 buf[size] = '\0';
578 *(void **) rs->dst = buf;
579 return GNUNET_OK;
580}
581
582
583/**
584 * 0- terminated string exprected.
585 *
586 * @param[out] dst where to store the result, allocated
587 * @return array entry for the result specification to use
588 */
589struct GNUNET_MY_ResultSpec
590GNUNET_MY_result_spec_string (char **dst)
591{
592 struct GNUNET_MY_ResultSpec res = {
593 .pre_conv = &pre_extract_string,
594 .post_conv = &post_extract_string,
595 .cleaner = NULL,
596 .dst = (void *) dst,
597 .dst_size = 0,
598 .num_fields = 1
599 };
600
601 return res;
602}
603
604
605/**
606 * Absolute time expected
607 *
608 * @param name name of the field in the table
609 * @param[out] at where to store the result
610 * @return array entry for the result specification to use
611 */
612struct GNUNET_MY_ResultSpec
613GNUNET_MY_result_spec_absolute_time (struct GNUNET_TIME_Absolute *at)
614{
615 return GNUNET_MY_result_spec_uint64 (&at->abs_value_us);
616}
617
618
619/**
620 * Absolute time in network byte order expected
621 *
622 * @param[out] at where to store the result
623 * @return array entry for the result specification to use
624 */
625struct GNUNET_MY_ResultSpec
626GNUNET_MY_result_spec_absolute_time_nbo (struct GNUNET_TIME_AbsoluteNBO *at)
627{
628 struct GNUNET_MY_ResultSpec res =
629 GNUNET_MY_result_spec_auto_from_type (&at->abs_value_us__);
630
631 return res;
632}
633
634
635/**
636 * Extract data from a Postgres database @a result at row @a row.
637 *
638 * @param cls closure
639 * @param[in,out] rs
640 * @param stmt the mysql statement that is being run
641 * @param column the column that is being processed
642 * @param[out] results
643 * @return
644 * #GNUNET_YES if all results could be extracted
645 * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
646 */
647static int
648pre_extract_uint16 (void *cls,
649 struct GNUNET_MY_ResultSpec *rs,
650 MYSQL_STMT *stmt,
651 unsigned int column,
652 MYSQL_BIND *results)
653{
654 results[0].buffer = rs->dst;
655 results[0].buffer_length = rs->dst_size;
656 results[0].length = &rs->mysql_bind_output_length;
657 results[0].buffer_type = MYSQL_TYPE_SHORT;
658 results[0].is_null = &rs->is_null;
659 rs->is_null = 0;
660
661 return GNUNET_OK;
662}
663
664
665/**
666 * Check size of extracted fixed size data from a Mysql database.
667 *
668 * @param cls closure
669 * @param[in,out] rs
670 * @param stmt the mysql statement that is being run
671 * @param column the column that is being processed
672 * @param[out] results
673 * @return
674 * #GNUNET_YES if all results could be extracted
675 * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
676 */
677static int
678post_extract_uint16 (void *cls,
679 struct GNUNET_MY_ResultSpec *rs,
680 MYSQL_STMT *stmt,
681 unsigned int column,
682 MYSQL_BIND *results)
683{
684 if (rs->dst_size != rs->mysql_bind_output_length)
685 return GNUNET_SYSERR;
686 if (*results->is_null)
687 return GNUNET_SYSERR;
688 return GNUNET_OK;
689}
690
691
692/**
693 * uint16_t expected
694 *
695 * @param[out] u16 where to store the result
696 * @return array entry for the result specification to use
697 */
698struct GNUNET_MY_ResultSpec
699GNUNET_MY_result_spec_uint16 (uint16_t *u16)
700{
701 struct GNUNET_MY_ResultSpec res = {
702 .pre_conv = &pre_extract_uint16,
703 .post_conv = &post_extract_uint16,
704 .cleaner = NULL,
705 .dst = (void *) u16,
706 .dst_size = sizeof(*u16),
707 .num_fields = 1
708 };
709
710 return res;
711}
712
713
714/**
715 * Extract data from a MYSQL database @a result at row @a row
716 *
717 * @param cls closure
718 * @param cls closure
719 * @param[in,out] rs
720 * @param stmt the mysql statement that is being run
721 * @param column the column that is being processed
722 * @param[out] results
723 * @return
724 * #GNUNET_OK if all results could be extracted
725 * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
726 */
727static int
728pre_extract_uint32 (void *cls,
729 struct GNUNET_MY_ResultSpec *rs,
730 MYSQL_STMT *stmt,
731 unsigned int column,
732 MYSQL_BIND *results)
733{
734 results[0].buffer = rs->dst;
735 results[0].buffer_length = rs->dst_size;
736 results[0].length = &rs->mysql_bind_output_length;
737 results[0].buffer_type = MYSQL_TYPE_LONG;
738 results[0].is_null = &rs->is_null;
739 rs->is_null = 0;
740
741 return GNUNET_OK;
742}
743
744
745/**
746 * Extract data from a MYSQL database @a result at row @a row
747 *
748 * @param cls closure
749 * @param cls closure
750 * @param[in,out] rs
751 * @param stmt the mysql statement that is being run
752 * @param column the column that is being processed
753 * @param[out] results
754 * @return
755 * #GNUNET_OK if all results could be extracted
756 * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
757 */
758static int
759post_extract_uint32 (void *cls,
760 struct GNUNET_MY_ResultSpec *rs,
761 MYSQL_STMT *stmt,
762 unsigned int column,
763 MYSQL_BIND *results)
764{
765 if (rs->dst_size != rs->mysql_bind_output_length)
766 return GNUNET_SYSERR;
767 if (*results->is_null)
768 return GNUNET_SYSERR;
769 return GNUNET_OK;
770}
771
772
773/**
774 * uint32_t expected
775 *
776 * @param[out] u32 where to store the result
777 * @return array entry for the result specification to use
778 */
779struct GNUNET_MY_ResultSpec
780GNUNET_MY_result_spec_uint32 (uint32_t *u32)
781{
782 struct GNUNET_MY_ResultSpec res = {
783 .pre_conv = &pre_extract_uint32,
784 .post_conv = &post_extract_uint32,
785 .cleaner = NULL,
786 .dst = (void *) u32,
787 .dst_size = sizeof(*u32),
788 .num_fields = 1
789 };
790
791 return res;
792}
793
794
795/**
796 * Extract data from a MYSQL database @a result at row @a row
797 *
798 * @param cls closure
799 * @param[in,out] rs
800 * @param stmt the mysql statement that is being run
801 * @param column the column that is being processed
802 * @param[out] results
803 * @return
804 * #GNUNET_OK if all results could be extracted
805 * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
806 */
807static int
808pre_extract_uint64 (void *cls,
809 struct GNUNET_MY_ResultSpec *rs,
810 MYSQL_STMT *stmt,
811 unsigned int column,
812 MYSQL_BIND *results)
813{
814 if (sizeof(uint64_t) != rs->dst_size)
815 return GNUNET_SYSERR;
816 results[0].buffer = rs->dst;
817 results[0].buffer_length = rs->dst_size;
818 results[0].length = &rs->mysql_bind_output_length;
819 results[0].buffer_type = MYSQL_TYPE_LONGLONG;
820 results[0].is_null = &rs->is_null;
821 rs->is_null = 0;
822
823 return GNUNET_OK;
824}
825
826
827/**
828 * Check size of extracted fixed-size data from a Mysql database
829 *
830 * @param cls closure
831 * @param[in,out] rs
832 * @param stmt the mysql statement that is being run
833 * @param column the column that is being processed
834 * @param[out] results
835 * @return
836 * #GNUNET_OK if all results could be extracted
837 * #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
838 */
839static int
840post_extract_uint64 (void *cls,
841 struct GNUNET_MY_ResultSpec *rs,
842 MYSQL_STMT *stmt,
843 unsigned int column,
844 MYSQL_BIND *results)
845{
846 if (sizeof(uint64_t) != rs->dst_size)
847 return GNUNET_SYSERR;
848 if (*results->is_null)
849 return GNUNET_SYSERR;
850 return GNUNET_OK;
851}
852
853
854/**
855 * uint64_t expected.
856 *
857 * @param[out] u64 where to store the result
858 * @return array entry for the result specification to use
859 */
860struct GNUNET_MY_ResultSpec
861GNUNET_MY_result_spec_uint64 (uint64_t *u64)
862{
863 struct GNUNET_MY_ResultSpec res = {
864 .pre_conv = &pre_extract_uint64,
865 .post_conv = &post_extract_uint64,
866 .cleaner = NULL,
867 .dst = (void *) u64,
868 .dst_size = sizeof(*u64),
869 .num_fields = 1
870 };
871
872 return res;
873}
874
875
876/* end of my_result_helper.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-18 05:41:19 +0000