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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_query_helper.c
* @brief helper functions for Taler-specific SQLite3 interactions
* @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"
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument, here a `struct TALER_Amount`
* @param data_len number of bytes in @a data (if applicable)
* @param stmt sqlite statement to parameters for
* @param off offset of the argument to bind in @a stmt, numbered from 1,
* so immediately suitable for passing to `sqlite3_bind`-functions.
* @return #GNUNET_SYSERR on error, #GNUNET_OK on success
*/
static enum GNUNET_GenericReturnValue
qconv_amount (void *cls,
const void *data,
size_t data_len,
sqlite3_stmt *stmt,
unsigned int off)
{
const struct TALER_Amount *amount = data;
(void) cls;
GNUNET_assert (sizeof (struct TALER_Amount) == data_len);
if (SQLITE_OK != sqlite3_bind_int64 (stmt,
(int) off,
(sqlite3_int64) amount->value))
return GNUNET_SYSERR;
if (SQLITE_OK != sqlite3_bind_int64 (stmt,
(int) off + 1,
(sqlite3_int64) amount->fraction))
return GNUNET_SYSERR;
return GNUNET_OK;
}
struct GNUNET_SQ_QueryParam
TALER_SQ_query_param_amount (const struct TALER_Amount *x)
{
struct GNUNET_SQ_QueryParam res = {
.conv = &qconv_amount,
.data = x,
.size = sizeof (*x),
.num_params = 2
};
return res;
}
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument, here a `struct TALER_AmountNBO`
* @param data_len number of bytes in @a data (if applicable)
* @param stmt sqlite statement to parameters for
* @param off offset of the argument to bind in @a stmt, numbered from 1,
* so immediately suitable for passing to `sqlite3_bind`-functions.
* @return #GNUNET_SYSERR on error, #GNUNET_OK on success
*/
static enum GNUNET_GenericReturnValue
qconv_amount_nbo (void *cls,
const void *data,
size_t data_len,
sqlite3_stmt *stmt,
unsigned int off)
{
const struct TALER_AmountNBO *amount = data;
struct TALER_Amount amount_hbo;
(void) cls;
(void) data_len;
TALER_amount_ntoh (&amount_hbo,
amount);
return qconv_amount (cls,
&amount_hbo,
sizeof (struct TALER_Amount),
stmt,
off);
}
struct GNUNET_SQ_QueryParam
TALER_SQ_query_param_amount_nbo (const struct TALER_AmountNBO *x)
{
struct GNUNET_SQ_QueryParam res = {
.conv = &qconv_amount_nbo,
.data = x,
.size = sizeof (*x),
.num_params = 2
};
return res;
}
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument, here a `struct TALER_Amount`
* @param data_len number of bytes in @a data (if applicable)
* @param stmt sqlite statement to parameters for
* @param off offset of the argument to bind in @a stmt, numbered from 1,
* so immediately suitable for passing to `sqlite3_bind`-functions.
* @return #GNUNET_SYSERR on error, #GNUNET_OK on success
*/
static enum GNUNET_GenericReturnValue
qconv_json (void *cls,
const void *data,
size_t data_len,
sqlite3_stmt *stmt,
unsigned int off)
{
const json_t *json = data;
char *str;
(void) cls;
(void) data_len;
str = json_dumps (json, JSON_COMPACT);
if (NULL == str)
return GNUNET_SYSERR;
if (SQLITE_OK != sqlite3_bind_text (stmt,
(int) off,
str,
strlen (str),
SQLITE_TRANSIENT))
return GNUNET_SYSERR;
GNUNET_free (str);
return GNUNET_OK;
}
struct GNUNET_SQ_QueryParam
TALER_SQ_query_param_json (const json_t *x)
{
struct GNUNET_SQ_QueryParam res = {
.conv = &qconv_json,
.data = x,
.size = sizeof (*x),
.num_params = 1
};
return res;
}
/* end of sq/sq_query_helper.c */
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