-
Notifications
You must be signed in to change notification settings - Fork 3
/
complex.c
176 lines (159 loc) · 6.06 KB
/
complex.c
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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
/*
* SPDX-FileCopyrightText: 2022 Kyunghwan Kwon <k@mononn.com>
*
* SPDX-License-Identifier: MIT
*/
#include "example.h"
#include "cbor/decoder.h"
#include "cbor/parser.h"
#include "cbor/helper.h"
static void do_unknown(cbor_reader_t const *reader, cbor_item_t const *item, void *udt)
{
struct udt *p = (struct udt *)udt;
if (item->type == CBOR_ITEM_SIMPLE_VALUE) {
cbor_decode(reader, item, &p->type, sizeof(p->type));
} else if (item->type == CBOR_ITEM_STRING && item->size == 16) {
cbor_decode(reader, item, &p->uuid, sizeof(p->uuid));
}
}
static void do_timestamp(cbor_reader_t const *reader, cbor_item_t const *item, void *udt)
{
struct udt *p = (struct udt *)udt;
cbor_decode(reader, item, &p->time, sizeof(p->time));
}
static void do_acc_x(cbor_reader_t const *reader, cbor_item_t const *item, void *udt)
{
struct udt *p = (struct udt *)udt;
cbor_decode(reader, item, &(p->data.acc.x), sizeof(p->data.acc.x));
}
static void do_acc_y(cbor_reader_t const *reader, cbor_item_t const *item, void *udt)
{
struct udt *p = (struct udt *)udt;
cbor_decode(reader, item, &(p->data.acc.y), sizeof(p->data.acc.y));
}
static void do_acc_z(cbor_reader_t const *reader, cbor_item_t const *item, void *udt)
{
struct udt *p = (struct udt *)udt;
cbor_decode(reader, item, &(p->data.acc.z), sizeof(p->data.acc.z));
}
static void do_gyr_x(cbor_reader_t const *reader, cbor_item_t const *item, void *udt)
{
struct udt *p = (struct udt *)udt;
cbor_decode(reader, item, &(p->data.gyro.x), sizeof(p->data.gyro.x));
}
static void do_gyr_y(cbor_reader_t const *reader, cbor_item_t const *item, void *udt)
{
struct udt *p = (struct udt *)udt;
cbor_decode(reader, item, &(p->data.gyro.y), sizeof(p->data.gyro.y));
}
static void do_gyr_z(cbor_reader_t const *reader, cbor_item_t const *item, void *udt)
{
struct udt *p = (struct udt *)udt;
cbor_decode(reader, item, &(p->data.gyro.z), sizeof(p->data.gyro.z));
}
static struct converter {
void const *primary;
void const *secondary;
void (*run)(cbor_reader_t const *reader, cbor_item_t const *item, void *udt);
} converters[] = {
{ .primary = "t", .secondary = NULL, .run = do_timestamp },
{ .primary = "x", .secondary = "acc", .run = do_acc_x },
{ .primary = "y", .secondary = "acc", .run = do_acc_y },
{ .primary = "z", .secondary = "acc", .run = do_acc_z },
{ .primary = "x", .secondary = "gyro", .run = do_gyr_x },
{ .primary = "y", .secondary = "gyro", .run = do_gyr_y },
{ .primary = "z", .secondary = "gyro", .run = do_gyr_z },
};
static void (*get_converter(void const *primary, size_t primary_len,
void const *secondary, size_t secondary_len))
(cbor_reader_t const *reader, cbor_item_t const *item, void *udt)
{
if ((primary == NULL && secondary == NULL) ||
(primary_len == 0 && secondary_len == 0)) {
return do_unknown;
}
for (size_t i = 0; i < sizeof(converters) / sizeof(converters[0]); i++) {
struct converter const *p = &converters[i];
if (p->primary && memcmp(p->primary, primary, primary_len)) {
continue;
} else if (p->secondary && memcmp(p->secondary, secondary, secondary_len)) {
continue;
}
if (p->primary || p->secondary) {
return p->run;
}
}
return do_unknown;
}
static void convert(cbor_reader_t const *reader, cbor_item_t const *item,
cbor_item_t const *parent, void *udt)
{
void const *primary = NULL;
void const *secondary = NULL;
size_t primary_len = 0;
size_t secondary_len = 0;
if (parent != NULL && parent->type == CBOR_ITEM_MAP) {
if ((item - parent) % 2) { /* key */
return;
}
if (parent->offset > 1) {
secondary = cbor_decode_pointer(reader, parent-1);
secondary_len = (parent-1)->size;
}
primary = cbor_decode_pointer(reader, item-1);
primary_len = (item-1)->size;
}
get_converter(primary, primary_len, secondary, secondary_len)
(reader, item, udt);
}
/*
sample_data[] = { 0x9f, 0xe1, 0x50, 0x12, 0x3e, 0x45, 0x67, 0xe8, 0x9b, 0x12,
0xd3, 0xa4, 0x56, 0x42, 0x66, 0x14, 0x17, 0x40, 0x00, 0xbf,
0x61, 0x74, 0x1a, 0x63, 0x04, 0x4b, 0xa5, 0x64, 0x64, 0x61,
0x74, 0x61, 0xa2, 0x63, 0x61, 0x63, 0x63, 0xa3, 0x61, 0x78,
0xf9, 0x00, 0x00, 0x61, 0x79, 0xf9, 0x00, 0x00, 0x61, 0x7a,
0xfa, 0x41, 0x1c, 0xf5, 0xc3, 0x64, 0x67, 0x79, 0x72, 0x6f,
0xa3, 0x61, 0x78, 0xfa, 0x40, 0xc9, 0x99, 0x9a, 0x61, 0x79,
0xf9, 0x00, 0x00, 0x61, 0x7a, 0xf9, 0x00, 0x00, 0xff, 0xff
};
generated by:
cbor_writer_init(&writer, writer_buffer, sizeof(writer_buffer));
cbor_encode_array_indefinite(&writer);
cbor_encode_simple(&writer, 1);
cbor_encode_byte_string(&writer, uuid, sizeof(uuid));
cbor_encode_map_indefinite(&writer);
cbor_encode_null_terminated_text_string(&writer, "t");
cbor_encode_unsigned_integer(&writer, 1661225893);
cbor_encode_null_terminated_text_string(&writer, "data");
cbor_encode_map(&writer, 2);
cbor_encode_null_terminated_text_string(&writer, "acc");
cbor_encode_map(&writer, 3);
cbor_encode_null_terminated_text_string(&writer, "x");
cbor_encode_float(&writer, 0.f);
cbor_encode_null_terminated_text_string(&writer, "y");
cbor_encode_float(&writer, 0.f);
cbor_encode_null_terminated_text_string(&writer, "z");
cbor_encode_float(&writer, 9.81f);
cbor_encode_null_terminated_text_string(&writer, "gyro");
cbor_encode_map(&writer, 3);
cbor_encode_null_terminated_text_string(&writer, "x");
cbor_encode_float(&writer, 6.3f);
cbor_encode_null_terminated_text_string(&writer, "y");
cbor_encode_float(&writer, 0.f);
cbor_encode_null_terminated_text_string(&writer, "z");
cbor_encode_float(&writer, 0.f);
cbor_encode_break(&writer);
cbor_encode_break(&writer);
See the test case: tests/src/example_test.cpp
*/
void complex_example(void const *data, size_t datasize, void *udt)
{
cbor_reader_t reader;
cbor_item_t items[32];
size_t n;
cbor_reader_init(&reader, items, sizeof(items) / sizeof(*items));
cbor_error_t err = cbor_parse(&reader, data, datasize, &n);
if (err == CBOR_SUCCESS || err == CBOR_BREAK) {
cbor_iterate(&reader, 0, convert, udt);
}
}