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
|
// Copyright 2020 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#include "pw_metric/metric.h"
#include <array>
#include <span>
#include "pw_log/log.h"
#include "pw_tokenizer/base64.h"
namespace pw::metric {
namespace {
template <typename T>
std::span<const std::byte> AsSpan(const T& t) {
return std::span<const std::byte>(reinterpret_cast<const std::byte*>(&t),
sizeof(t));
}
// A convenience class to encode a token as base64 while managing the storage.
// TODO(keir): Consider putting this into upstream pw_tokenizer.
struct Base64EncodedToken {
Base64EncodedToken(Token token) {
int encoded_size = tokenizer::PrefixedBase64Encode(AsSpan(token), data);
data[encoded_size] = 0;
}
const char* value() { return data.data(); }
std::array<char, 16> data;
};
const char* Indent(int level) {
static const char* kWhitespace8 = " ";
level = std::min(level, 4);
return kWhitespace8 + 8 - 2 * level;
}
} // namespace
// Enable easier registration when used as a member.
Metric::Metric(Token name, float value, IntrusiveList<Metric>& metrics)
: Metric(name, value) {
metrics.push_front(*this);
}
Metric::Metric(Token name, uint32_t value, IntrusiveList<Metric>& metrics)
: Metric(name, value) {
metrics.push_front(*this);
}
float Metric::as_float() const {
PW_DCHECK(is_float());
return float_;
}
uint32_t Metric::as_int() const {
PW_DCHECK(is_int());
return uint_;
}
void Metric::Increment(uint32_t amount) {
PW_DCHECK(is_int());
uint_ += amount;
}
void Metric::SetInt(uint32_t value) {
PW_DCHECK(is_int());
uint_ = value;
}
void Metric::SetFloat(float value) {
PW_DCHECK(is_float());
float_ = value;
}
void Metric::Dump(int level) {
Base64EncodedToken encoded_name(name());
const char* indent = Indent(level);
if (is_float()) {
PW_LOG_INFO("%s \"%s\": %f,", indent, encoded_name.value(), as_float());
} else {
PW_LOG_INFO("%s \"%s\": %u,",
indent,
encoded_name.value(),
static_cast<unsigned int>(as_int()));
}
}
void Metric::Dump(IntrusiveList<Metric>& metrics, int level) {
for (auto& m : metrics) {
m.Dump(level);
}
}
Group::Group(Token name) : name_(name) {}
Group::Group(Token name, IntrusiveList<Group>& groups) : name_(name) {
groups.push_front(*this);
}
void Group::Dump(int level) {
Base64EncodedToken encoded_name(name());
const char* indent = Indent(level);
PW_LOG_INFO("%s \"%s\": {", indent, encoded_name.value());
Group::Dump(children(), level + 1);
Metric::Dump(metrics(), level + 1);
PW_LOG_INFO("%s }", indent);
}
void Group::Dump(IntrusiveList<Group>& groups, int level) {
for (auto& group : groups) {
group.Dump(level);
}
}
} // namespace pw::metric
|
