// 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 #include #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 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