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- // Copyright 2017 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "components/metrics/expired_histograms_checker.h"
- #include <algorithm>
- #include <vector>
- #include "base/containers/contains.h"
- #include "base/metrics/metrics_hashes.h"
- #include "base/metrics/statistics_recorder.h"
- #include "base/strings/string_split.h"
- namespace metrics {
- ExpiredHistogramsChecker::ExpiredHistogramsChecker(
- const uint32_t* expired_histogram_hashes,
- size_t size,
- const std::string& allowlist_str)
- : expired_histogram_hashes_(expired_histogram_hashes), size_(size) {
- InitAllowlist(allowlist_str);
- }
- ExpiredHistogramsChecker::~ExpiredHistogramsChecker() {}
- bool ExpiredHistogramsChecker::ShouldRecord(uint32_t histogram_hash) const {
- // If histogram is explicitly allowed then it should always be recorded.
- if (base::Contains(allowlist_, histogram_hash))
- return true;
- return !std::binary_search(expired_histogram_hashes_.get(),
- expired_histogram_hashes_ + size_, histogram_hash);
- }
- void ExpiredHistogramsChecker::InitAllowlist(const std::string& allowlist_str) {
- std::vector<base::StringPiece> allowlist_names = base::SplitStringPiece(
- allowlist_str, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
- for (base::StringPiece name : allowlist_names)
- allowlist_.insert(base::HashMetricNameAs32Bits(name));
- }
- } // namespace metrics
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