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/*
This file is part of TALER
Copyright (C) 2020 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file sq/sq_result_helper.c
* @brief functions to initialize parameter arrays
* @author Jonathan Buchanan
*/
#include "platform.h"
#include <sqlite3.h>
#include <gnunet/gnunet_util_lib.h>
#include <gnunet/gnunet_sq_lib.h>
#include "taler_sq_lib.h"
#include "taler_util.h"
/**
* Extract amount data from a SQLite database
*
* @param cls closure, a `const char *` giving the currency
* @param result where to extract data from
* @param column column to extract data from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
*/
static enum GNUNET_GenericReturnValue
extract_amount (void *cls,
sqlite3_stmt *result,
unsigned int column,
size_t *dst_size,
void *dst)
{
struct TALER_Amount *amount = dst;
const char *currency = cls;
uint64_t frac;
if ((sizeof (struct TALER_Amount) != *dst_size) ||
(SQLITE_INTEGER != sqlite3_column_type (result,
(int) column)) ||
(SQLITE_INTEGER != sqlite3_column_type (result,
(int) column + 1)))
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
GNUNET_strlcpy (amount->currency,
currency,
TALER_CURRENCY_LEN);
amount->value = (uint64_t) sqlite3_column_int64 (result,
(int) column);
frac = (uint64_t) sqlite3_column_int64 (result,
(int) column + 1);
amount->fraction = (uint32_t) frac;
return GNUNET_YES;
}
struct GNUNET_SQ_ResultSpec
TALER_SQ_result_spec_amount (const char *currency,
struct TALER_Amount *amount)
{
struct GNUNET_SQ_ResultSpec res = {
.conv = &extract_amount,
.cls = (void *) currency,
.dst = (void *) amount,
.dst_size = sizeof (struct TALER_Amount),
.num_params = 2
};
return res;
}
/**
* Extract amount data from a SQLite database
*
* @param cls closure, a `const char *` giving the currency
* @param result where to extract data from
* @param column column to extract data from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
*/
static enum GNUNET_GenericReturnValue
extract_amount_nbo (void *cls,
sqlite3_stmt *result,
unsigned int column,
size_t *dst_size,
void *dst)
{
struct TALER_AmountNBO *amount = dst;
struct TALER_Amount amount_hbo;
size_t amount_hbo_size = sizeof (struct TALER_Amount);
(void) cls;
(void) dst_size;
if (GNUNET_YES !=
extract_amount (cls,
result,
column,
&amount_hbo_size,
&amount_hbo))
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
TALER_amount_hton (amount,
&amount_hbo);
return GNUNET_YES;
}
struct GNUNET_SQ_ResultSpec
TALER_SQ_result_spec_amount_nbo (const char *currency,
struct TALER_AmountNBO *amount)
{
struct GNUNET_SQ_ResultSpec res = {
.conv = &extract_amount_nbo,
.cls = (void *) currency,
.dst = (void *) amount,
.dst_size = sizeof (struct TALER_AmountNBO),
.num_params = 2
};
return res;
}
/**
* Extract amount data from a SQLite database
*
* @param cls closure
* @param result where to extract data from
* @param column column to extract data from
* @param[in,out] dst_size where to store size of result, may be NULL
* @param[out] dst where to store the result
* @return
* #GNUNET_YES if all results could be extracted
* #GNUNET_SYSERR if a result was invalid (non-existing field or NULL)
*/
static enum GNUNET_GenericReturnValue
extract_json (void *cls,
sqlite3_stmt *result,
unsigned int column,
size_t *dst_size,
void *dst)
{
json_t **j_dst = dst;
const char *res;
json_error_t json_error;
size_t slen;
(void) cls;
(void) dst_size;
if (SQLITE_TEXT != sqlite3_column_type (result,
column))
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
res = (const char *) sqlite3_column_text (result,
column);
slen = strlen (res);
*j_dst = json_loadb (res,
slen,
JSON_REJECT_DUPLICATES,
&json_error);
if (NULL == *j_dst)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to parse JSON result for column %d: %s (%s)\n",
column,
json_error.text,
json_error.source);
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Function called to clean up memory allocated
* by a #GNUNET_SQ_ResultConverter.
*
* @param cls closure
*/
static void
clean_json (void *cls)
{
json_t **dst = cls;
(void) cls;
if (NULL != *dst)
{
json_decref (*dst);
*dst = NULL;
}
}
/**
* json_t expected.
*
* @param[out] jp where to store the result
* @return array entry for the result specification to use
*/
struct GNUNET_SQ_ResultSpec
TALER_SQ_result_spec_json (json_t **jp)
{
struct GNUNET_SQ_ResultSpec res = {
.conv = &extract_json,
.cleaner = &clean_json,
.dst = (void *) jp,
.cls = (void *) jp,
.num_params = 1
};
return res;
}
/* end of sq/sq_result_helper.c */
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