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/*
This file is part of TALER
Copyright (C) 2023 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 pq/pq_common.h
* @brief common defines for the pq functions
* @author Özgür Kesim
*/
#ifndef TALER_PQ_COMMON_H_
#define TALER_PQ_COMMON_H_
#include "taler_util.h"
/**
* Internal types that are supported as TALER-exchange-specific array types.
*
* To support a new type,
* 1. add a new entry into this list,
* 2. for query-support, implement the size calculation and memory copying in
* qconv_array() accordingly, in pq_query_helper.c
* 3. provide a query-API for arrays of the type, by calling
* query_param_array_generic with the appropriate parameters,
* in pq_query_helper.c
* 4. for result-support, implement memory copying by adding another case
* to extract_array_generic, in pq_result_helper.c
* 5. provide a result-spec-API for arrays of the type,
* in pq_result_helper.c
* 6. expose the API's in taler_pq_lib.h
*/
enum TALER_PQ_ArrayType
{
TALER_PQ_array_of_blinded_denom_sig,
TALER_PQ_array_of_blinded_coin_hash,
TALER_PQ_array_of_denom_hash,
/**
* Amounts *without* currency.
*/
TALER_PQ_array_of_amount,
TALER_PQ_array_of_MAX, /* must be last */
};
/**
* Memory representation of an taler amount record for Postgres.
*
* All values need to be in network-byte-order.
*/
struct TALER_PQ_AmountP
{
uint32_t oid_v; /* oid of .v */
uint32_t sz_v; /* size of .v */
uint64_t v; /* value */
uint32_t oid_f; /* oid of .f */
uint32_t sz_f; /* size of .f */
uint32_t f; /* fraction */
} __attribute__((packed));
/**
* Memory representation of an taler amount record with currency for Postgres.
*
* All values need to be in network-byte-order.
*/
struct TALER_PQ_AmountCurrencyP
{
uint32_t cnt; /* number of OIDs in tuple */
uint32_t oid_v; /* oid of .v */
uint32_t sz_v; /* size of .v */
uint64_t v; /* value */
uint32_t oid_f; /* oid of .f */
uint32_t sz_f; /* size of .f */
uint32_t f; /* fraction */
/**
* oid of .c
*/
uint32_t oid_c;
/**
* size of .c
*/
uint32_t sz_c;
/**
* currency
*/
uint8_t c[TALER_CURRENCY_LEN];
} __attribute__((packed));
/**
* Create a `struct TALER_PQ_AmountP` for initialization
*
* @param amount amount of type `struct TALER_Amount *`
* @param oid_v OID of the INT8 type in postgres
* @param oid_f OID of the INT4 type in postgres
*/
struct TALER_PQ_AmountP
TALER_PQ_make_taler_pq_amount_ (
const struct TALER_Amount *amount,
uint32_t oid_v,
uint32_t oid_f);
/**
* Create a `struct TALER_PQ_AmountCurrencyP` for initialization
*
* @param amount amount of type `struct TALER_Amount *`
* @param oid_v OID of the INT8 type in postgres
* @param oid_f OID of the INT4 type in postgres
* @param oid_c OID of the TEXT type in postgres
* @param[out] rval set to encoded @a amount
* @return actual (useful) size of @a rval for Postgres
*/
size_t
TALER_PQ_make_taler_pq_amount_currency_ (
const struct TALER_Amount *amount,
uint32_t oid_v,
uint32_t oid_f,
uint32_t oid_c,
struct TALER_PQ_AmountCurrencyP *rval);
#endif /* TALER_PQ_COMMON_H_ */
/* end of pg/pq_common.h */
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