1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/*
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 "platform.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,
/* TODO[oec]: Next up: TALER_PQ_array_of_amount, */
TALER_PQ_array_of_MAX, /* must be last */
};
/**
* The header for a postgresql array in binary format. note that this a
* simplified special case of the general structure (which contains pointers),
* as we only support one-dimensional arrays.
*/
struct TALER_PQ_ArrayHeader_P
{
uint32_t ndim; /* number of dimensions. we only support ndim = 1 */
uint32_t has_null;
uint32_t oid;
uint32_t dim; /* size of the array */
uint32_t lbound; /* index value of first element in the db (default: 1). */
} __attribute__((packed));
/**
* Memory representation of an taler amount record for Postgres.
*
* All values need to be in network-byte-order.
*/
struct TALER_PQ_Amount_P
{
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));
/**
* Create a `struct TALER_PQ_Amount_P` for initialization
*
* @param db postgres-context of type `struct GNUNET_PQ_Context *`
* @param amount amount of type `struct TALER_Amount *`
*/
#define MAKE_TALER_PQ_AMOUNT_P(db,amount) \
{ \
.oid_v = htonl (GNUNET_PQ_get_oid ((db), GNUNET_PQ_DATATYPE_INT8)), \
.oid_f = htonl (GNUNET_PQ_get_oid ((db), GNUNET_PQ_DATATYPE_INT4)), \
.sz_v = htonl (sizeof((amount)->value)), \
.sz_f = htonl (sizeof((amount)->fraction)), \
.v = GNUNET_htonll ((amount)->value), \
.f = htonl ((amount)->fraction) \
}
#endif /* TALER_PQ_COMMON_H_ */
/* end of pg/pq_common.h */
|
