| // Copyright 2018 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_TEST_METRICS_HISTOGRAM_ENUM_READER_H_ |
| #define BASE_TEST_METRICS_HISTOGRAM_ENUM_READER_H_ |
| |
| #include <map> |
| #include <string> |
| |
| #include "base/metrics/histogram_base.h" |
| #include "third_party/abseil-cpp/absl/types/optional.h" |
| |
| namespace base { |
| |
| using HistogramEnumEntryMap = std::map<HistogramBase::Sample, std::string>; |
| |
| // Find and read the enum with the given |enum_name| (with integer values) from |
| // tools/metrics/histograms/enums.xml, or from enums.xml in the given |
| // |subdirectory| of tools/metrics/histograms/metadata. |
| // |
| // Returns map { value => label } so that: |
| // <int value="9" label="enable-pinch-virtual-viewport"/> |
| // becomes: |
| // { 9 => "enable-pinch-virtual-viewport" } |
| // Returns empty absl::nullopt on failure. |
| absl::optional<HistogramEnumEntryMap> ReadEnumFromEnumsXml( |
| const std::string& enum_name, |
| const absl::optional<std::string>& subdirectory = absl::nullopt); |
| |
| } // namespace base |
| |
| #endif // BASE_TEST_METRICS_HISTOGRAM_ENUM_READER_H_ |
