| // 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. |
| |
| #include "metrics.h" |
| |
| #include <algorithm> |
| #include <cctype> |
| #include <cstring> |
| |
| #include "pw_assert/check.h" |
| #include "pw_status/try.h" |
| |
| namespace pw::fuzzer::examples { |
| namespace { |
| Metric::Key Hash(std::string_view str) { |
| PW_CHECK(std::all_of(str.begin(), str.end(), isprint)); |
| return static_cast<Metric::Key>(std::hash<std::string_view>{}(str)); |
| } |
| |
| template <typename T> |
| using IsCopyable = |
| std::enable_if_t<std::is_unsigned_v<T> && !std::is_same_v<T, bool>>; |
| |
| template <typename T, typename = IsCopyable<T>> |
| Status CopyTo(pw::ByteSpan dst, size_t& offset, const T& src) { |
| size_t len = sizeof(src); |
| if (offset + len > dst.size()) { |
| return Status::ResourceExhausted(); |
| } |
| memcpy(&dst[offset], &src, len); |
| offset += len; |
| return OkStatus(); |
| } |
| |
| template <typename T, typename = IsCopyable<T>> |
| Status CopyFrom(pw::ConstByteSpan src, size_t& offset, T& dst) { |
| size_t len = sizeof(dst); |
| if (offset + len > src.size()) { |
| return Status::ResourceExhausted(); |
| } |
| memcpy(&dst, &src[offset], len); |
| offset += len; |
| return OkStatus(); |
| } |
| |
| } // namespace |
| |
| Metric::Metric(std::string_view name_, Value value_) |
| : name(name_), value(value_) { |
| key = Hash(name_); |
| } |
| |
| std::optional<Metric::Value> Metrics::GetValue(std::string_view name) const { |
| for (const auto& metric : metrics_) { |
| if (metric.name == name) { |
| return metric.value; |
| } |
| } |
| return std::optional<Metric::Value>(); |
| } |
| |
| Status Metrics::SetValue(std::string_view name, Metric::Value value) { |
| for (auto& metric : metrics_) { |
| if (metric.name == name) { |
| metric.value = value; |
| return OkStatus(); |
| } |
| } |
| if (metrics_.full()) { |
| return Status::ResourceExhausted(); |
| } |
| metrics_.emplace_back(name, value); |
| return OkStatus(); |
| } |
| |
| const Vector<Metric>& Metrics::GetMetrics() const { return metrics_; } |
| |
| Status Metrics::SetMetrics(const Vector<Metric>& metrics) { |
| if (metrics_.capacity() < metrics.size()) { |
| return Status::ResourceExhausted(); |
| } |
| metrics_.assign(metrics.begin(), metrics.end()); |
| return OkStatus(); |
| } |
| |
| StatusWithSize Metrics::Serialize(pw::ByteSpan buffer) const { |
| size_t offset = 0; |
| PW_TRY_WITH_SIZE(CopyTo(buffer, offset, metrics_.size())); |
| for (const auto& metric : metrics_) { |
| PW_TRY_WITH_SIZE(CopyTo(buffer, offset, metric.key)); |
| PW_TRY_WITH_SIZE(CopyTo(buffer, offset, metric.value)); |
| } |
| return StatusWithSize(offset); |
| } |
| |
| Status Metrics::Deserialize(pw::ConstByteSpan buffer) { |
| size_t offset = 0; |
| size_t num_values = 0; |
| PW_TRY(CopyFrom(buffer, offset, num_values)); |
| for (size_t i = 0; i < num_values; ++i) { |
| Metric::Key key; |
| PW_TRY(CopyFrom(buffer, offset, key)); |
| Metric::Value value; |
| PW_TRY(CopyFrom(buffer, offset, value)); |
| bool found = false; |
| for (auto& metric : metrics_) { |
| if (metric.key == key) { |
| metric.value = value; |
| found = true; |
| break; |
| } |
| } |
| if (!found) { |
| return Status::InvalidArgument(); |
| } |
| } |
| return OkStatus(); |
| } |
| |
| } // namespace pw::fuzzer::examples |