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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/metrics/metrics_hashes.h"
#include "base/metrics/statistics_recorder.h"
#include "base/stl_util.h"
#include "base/strings/string_split.h"
namespace metrics {
ExpiredHistogramsChecker::ExpiredHistogramsChecker(
const uint64_t* array,
size_t size,
const std::string& whitelist_str)
: array_(array), size_(size) {
InitWhitelist(whitelist_str);
}
ExpiredHistogramsChecker::~ExpiredHistogramsChecker() {}
bool ExpiredHistogramsChecker::ShouldRecord(uint64_t histogram_hash) const {
// If histogram is whitelisted then it should always be recorded.
if (base::Contains(whitelist_, histogram_hash))
return true;
return !std::binary_search(array_, array_ + size_, histogram_hash);
}
void ExpiredHistogramsChecker::InitWhitelist(const std::string& whitelist_str) {
std::vector<base::StringPiece> whitelist_names = base::SplitStringPiece(
whitelist_str, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
for (base::StringPiece name : whitelist_names)
whitelist_.insert(base::HashMetricName(name));
}
} // namespace metrics
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