// Copyright 2017 The Chromium Authors // 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 #include #include "base/containers/contains.h" #include "base/memory/raw_ptr.h" #include "base/metrics/metrics_hashes.h" #include "base/metrics/statistics_recorder.h" #include "base/strings/string_split.h" namespace metrics { ExpiredHistogramsChecker::ExpiredHistogramsChecker( base::span expired_histogram_hashes, const std::string& allowlist_str) : expired_histogram_hashes_(expired_histogram_hashes) { InitAllowlist(allowlist_str); } ExpiredHistogramsChecker::~ExpiredHistogramsChecker() = default; 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(std::begin(expired_histogram_hashes_), std::end(expired_histogram_hashes_), histogram_hash); } void ExpiredHistogramsChecker::InitAllowlist(const std::string& allowlist_str) { std::vector 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