LCOV - code coverage report
Current view: top level - sq - sq_result_helper.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 44 52 84.6 %
Date: 2025-06-05 21:03:14 Functions: 7 7 100.0 %

          Line data    Source code
       1             : /*
       2             :   This file is part of TALER
       3             :   Copyright (C) 2020 Taler Systems SA
       4             : 
       5             :   TALER is free software; you can redistribute it and/or modify it under the
       6             :   terms of the GNU General Public License as published by the Free Software
       7             :   Foundation; either version 3, or (at your option) any later version.
       8             : 
       9             :   TALER is distributed in the hope that it will be useful, but WITHOUT ANY
      10             :   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
      11             :   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
      12             : 
      13             :   You should have received a copy of the GNU General Public License along with
      14             :   TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
      15             : */
      16             : /**
      17             :  * @file sq/sq_result_helper.c
      18             :  * @brief functions to initialize parameter arrays
      19             :  * @author Jonathan Buchanan
      20             :  */
      21             : #include "platform.h"
      22             : #include <sqlite3.h>
      23             : #include <gnunet/gnunet_util_lib.h>
      24             : #include <gnunet/gnunet_sq_lib.h>
      25             : #include "taler_sq_lib.h"
      26             : #include "taler_util.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Extract amount data from a SQLite database
      31             :  *
      32             :  * @param cls closure, a `const char *` giving the currency
      33             :  * @param result where to extract data from
      34             :  * @param column column to extract data from
      35             :  * @param[in,out] dst_size where to store size of result, may be NULL
      36             :  * @param[out] dst where to store the result
      37             :  * @return
      38             :  *   #GNUNET_YES if all results could be extracted
      39             :  *   #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
      40             :  */
      41             : static enum GNUNET_GenericReturnValue
      42           2 : extract_amount (void *cls,
      43             :                 sqlite3_stmt *result,
      44             :                 unsigned int column,
      45             :                 size_t *dst_size,
      46             :                 void *dst)
      47             : {
      48           2 :   struct TALER_Amount *amount = dst;
      49           2 :   const char *currency = cls;
      50             :   uint64_t frac;
      51             : 
      52           4 :   if ((sizeof (struct TALER_Amount) != *dst_size) ||
      53           2 :       (SQLITE_INTEGER != sqlite3_column_type (result,
      54           2 :                                               (int) column)) ||
      55           2 :       (SQLITE_INTEGER != sqlite3_column_type (result,
      56           2 :                                               (int) column + 1)))
      57             :   {
      58           0 :     GNUNET_break (0);
      59           0 :     return GNUNET_SYSERR;
      60             :   }
      61           2 :   GNUNET_strlcpy (amount->currency,
      62             :                   currency,
      63             :                   TALER_CURRENCY_LEN);
      64           2 :   amount->value = (uint64_t) sqlite3_column_int64 (result,
      65             :                                                    (int) column);
      66           4 :   frac = (uint64_t) sqlite3_column_int64 (result,
      67           2 :                                           (int) column + 1);
      68           2 :   amount->fraction = (uint32_t) frac;
      69           2 :   return GNUNET_YES;
      70             : }
      71             : 
      72             : 
      73             : struct GNUNET_SQ_ResultSpec
      74           1 : TALER_SQ_result_spec_amount (const char *currency,
      75             :                              struct TALER_Amount *amount)
      76             : {
      77           1 :   struct GNUNET_SQ_ResultSpec res = {
      78             :     .conv = &extract_amount,
      79             :     .cls = (void *) currency,
      80             :     .dst = (void *) amount,
      81             :     .dst_size = sizeof (struct TALER_Amount),
      82             :     .num_params = 2
      83             :   };
      84             : 
      85           1 :   return res;
      86             : }
      87             : 
      88             : 
      89             : /**
      90             :  * Extract amount data from a SQLite database
      91             :  *
      92             :  * @param cls closure, a `const char *` giving the currency
      93             :  * @param result where to extract data from
      94             :  * @param column column to extract data from
      95             :  * @param[in,out] dst_size where to store size of result, may be NULL
      96             :  * @param[out] dst where to store the result
      97             :  * @return
      98             :  *   #GNUNET_YES if all results could be extracted
      99             :  *   #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
     100             :  */
     101             : static enum GNUNET_GenericReturnValue
     102           1 : extract_amount_nbo (void *cls,
     103             :                     sqlite3_stmt *result,
     104             :                     unsigned int column,
     105             :                     size_t *dst_size,
     106             :                     void *dst)
     107             : {
     108           1 :   struct TALER_AmountNBO *amount = dst;
     109             :   struct TALER_Amount amount_hbo;
     110           1 :   size_t amount_hbo_size = sizeof (struct TALER_Amount);
     111             : 
     112             :   (void) cls;
     113             :   (void) dst_size;
     114           1 :   if (GNUNET_YES !=
     115           1 :       extract_amount (cls,
     116             :                       result,
     117             :                       column,
     118             :                       &amount_hbo_size,
     119             :                       &amount_hbo))
     120             :   {
     121           0 :     GNUNET_break (0);
     122           0 :     return GNUNET_SYSERR;
     123             :   }
     124           1 :   TALER_amount_hton (amount,
     125             :                      &amount_hbo);
     126           1 :   return GNUNET_YES;
     127             : }
     128             : 
     129             : 
     130             : struct GNUNET_SQ_ResultSpec
     131           1 : TALER_SQ_result_spec_amount_nbo (const char *currency,
     132             :                                  struct TALER_AmountNBO *amount)
     133             : {
     134           1 :   struct GNUNET_SQ_ResultSpec res = {
     135             :     .conv = &extract_amount_nbo,
     136             :     .cls = (void *) currency,
     137             :     .dst = (void *) amount,
     138             :     .dst_size = sizeof (struct TALER_AmountNBO),
     139             :     .num_params = 2
     140             :   };
     141             : 
     142           1 :   return res;
     143             : }
     144             : 
     145             : 
     146             : /**
     147             :  * Extract amount data from a SQLite database
     148             :  *
     149             :  * @param cls closure
     150             :  * @param result where to extract data from
     151             :  * @param column column to extract data from
     152             :  * @param[in,out] dst_size where to store size of result, may be NULL
     153             :  * @param[out] dst where to store the result
     154             :  * @return
     155             :  *   #GNUNET_YES if all results could be extracted
     156             :  *   #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
     157             :  */
     158             : static enum GNUNET_GenericReturnValue
     159           1 : extract_json (void *cls,
     160             :               sqlite3_stmt *result,
     161             :               unsigned int column,
     162             :               size_t *dst_size,
     163             :               void *dst)
     164             : {
     165           1 :   json_t **j_dst = dst;
     166             :   const char *res;
     167             :   json_error_t json_error;
     168             :   size_t slen;
     169             : 
     170             :   (void) cls;
     171             :   (void) dst_size;
     172           1 :   if (SQLITE_TEXT != sqlite3_column_type (result,
     173             :                                           column))
     174             :   {
     175           0 :     GNUNET_break (0);
     176           0 :     return GNUNET_SYSERR;
     177             :   }
     178           1 :   res = (const char *) sqlite3_column_text (result,
     179             :                                             column);
     180           1 :   slen = strlen (res);
     181           1 :   *j_dst = json_loadb (res,
     182             :                        slen,
     183             :                        JSON_REJECT_DUPLICATES,
     184             :                        &json_error);
     185           1 :   if (NULL == *j_dst)
     186             :   {
     187           0 :     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     188             :                 "Failed to parse JSON result for column %d: %s (%s)\n",
     189             :                 column,
     190             :                 json_error.text,
     191             :                 json_error.source);
     192           0 :     return GNUNET_SYSERR;
     193             :   }
     194           1 :   return GNUNET_OK;
     195             : }
     196             : 
     197             : 
     198             : /**
     199             :  * Function called to clean up memory allocated
     200             :  * by a #GNUNET_SQ_ResultConverter.
     201             :  *
     202             :  * @param cls closure
     203             :  */
     204             : static void
     205           1 : clean_json (void *cls)
     206             : {
     207           1 :   json_t **dst = cls;
     208             : 
     209             :   (void) cls;
     210           1 :   if (NULL != *dst)
     211             :   {
     212           1 :     json_decref (*dst);
     213           1 :     *dst = NULL;
     214             :   }
     215           1 : }
     216             : 
     217             : 
     218             : /**
     219             :  * json_t expected.
     220             :  *
     221             :  * @param[out] jp where to store the result
     222             :  * @return array entry for the result specification to use
     223             :  */
     224             : struct GNUNET_SQ_ResultSpec
     225           1 : TALER_SQ_result_spec_json (json_t **jp)
     226             : {
     227           1 :   struct GNUNET_SQ_ResultSpec res = {
     228             :     .conv = &extract_json,
     229             :     .cleaner = &clean_json,
     230             :     .dst = (void *) jp,
     231             :     .cls = (void *) jp,
     232             :     .num_params = 1
     233             :   };
     234             : 
     235           1 :   return res;
     236             : }
     237             : 
     238             : 
     239             : /* end of sq/sq_result_helper.c */

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