blob: 5538ff669f28f7f9a437b02bcd1659236a9f72ee (
plain)
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
|
// Copyright 2023 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.
#pragma once
#include <cstddef>
#include <cstdint>
#include <deque>
#include <vector>
#include "pw_assert/assert.h"
#include "pw_bytes/span.h"
#include "pw_varint/varint.h"
namespace pw::containers {
// Behaves like a VariableLengthEntryQueue should, but with a std::deque-based
// implementation.
class VariableLengthEntryQueueTestOracle {
public:
VariableLengthEntryQueueTestOracle(uint32_t max_size_bytes)
: max_size_bytes_(max_size_bytes),
raw_size_bytes_(0),
raw_capacity_bytes_(
static_cast<uint32_t>(varint::EncodedSize(max_size_bytes)) +
max_size_bytes) {}
void clear() {
q_.clear();
raw_size_bytes_ = 0;
}
void push_overwrite(ConstByteSpan data) {
size_t encoded_size = varint::EncodedSize(data.size()) + data.size();
while (encoded_size > (raw_capacity_bytes_ - raw_size_bytes_)) {
pop();
}
push(data);
}
void push(ConstByteSpan data) {
PW_ASSERT(data.size() <= max_size_bytes_);
size_t encoded_size = varint::EncodedSize(data.size()) + data.size();
PW_ASSERT(encoded_size <= raw_capacity_bytes_ - raw_size_bytes_);
q_.emplace_back(data.begin(), data.end());
raw_size_bytes_ += encoded_size;
}
void pop() {
PW_ASSERT(!q_.empty());
raw_size_bytes_ -=
varint::EncodedSize(q_.front().size()) + q_.front().size();
q_.pop_front();
}
uint32_t size() const { return static_cast<uint32_t>(q_.size()); }
uint32_t size_bytes() const {
uint32_t total_bytes = 0;
for (const auto& entry : q_) {
total_bytes += static_cast<uint32_t>(entry.size());
}
return total_bytes;
}
uint32_t max_size_bytes() const { return max_size_bytes_; }
std::deque<std::vector<std::byte>>::const_iterator begin() const {
return q_.begin();
}
std::deque<std::vector<std::byte>>::const_iterator end() const {
return q_.end();
}
private:
std::deque<std::vector<std::byte>> q_;
const uint32_t max_size_bytes_;
uint32_t raw_size_bytes_;
const uint32_t raw_capacity_bytes_;
};
} // namespace pw::containers
|
