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// Copyright 2014 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/serialization/metric_sample.h"
#include <string>
#include <vector>
#include "base/check_op.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "base/strings/stringprintf.h"
namespace metrics {
MetricSample::MetricSample(MetricSample::SampleType sample_type,
const std::string& metric_name,
int sample,
int min,
int max,
int bucket_count,
int num_samples)
: type_(sample_type),
name_(metric_name),
sample_(sample),
min_(min),
max_(max),
bucket_count_(bucket_count),
num_samples_(num_samples) {}
MetricSample::~MetricSample() {
}
bool MetricSample::IsValid() const {
return name().find(' ') == std::string::npos &&
name().find('\0') == std::string::npos && !name().empty();
}
std::string MetricSample::ToString() const {
std::string samples =
(num_samples_ == 1) ? "" : base::StringPrintf(" %d", num_samples_);
if (type_ == CRASH) {
return base::StringPrintf("crash%c%s%s%c", '\0', name().c_str(),
samples.c_str(), '\0');
}
if (type_ == SPARSE_HISTOGRAM) {
return base::StringPrintf("sparsehistogram%c%s %d%s%c", '\0',
name().c_str(), sample_, samples.c_str(), '\0');
}
if (type_ == LINEAR_HISTOGRAM) {
return base::StringPrintf("linearhistogram%c%s %d %d%s%c", '\0',
name().c_str(), sample_, max_, samples.c_str(),
'\0');
}
if (type_ == HISTOGRAM) {
return base::StringPrintf("histogram%c%s %d %d %d %d%s%c", '\0',
name().c_str(), sample_, min_, max_,
bucket_count_, samples.c_str(), '\0');
}
// The type can only be USER_ACTION.
CHECK_EQ(type_, USER_ACTION);
return base::StringPrintf("useraction%c%s%s%c", '\0', name().c_str(),
samples.c_str(), '\0');
}
int MetricSample::sample() const {
CHECK_NE(type_, USER_ACTION);
CHECK_NE(type_, CRASH);
return sample_;
}
int MetricSample::min() const {
CHECK_EQ(type_, HISTOGRAM);
return min_;
}
int MetricSample::max() const {
CHECK_NE(type_, CRASH);
CHECK_NE(type_, USER_ACTION);
CHECK_NE(type_, SPARSE_HISTOGRAM);
return max_;
}
int MetricSample::bucket_count() const {
CHECK_EQ(type_, HISTOGRAM);
return bucket_count_;
}
// static
std::unique_ptr<MetricSample> MetricSample::CrashSample(
const std::string& crash_name,
int num_samples) {
return std::make_unique<MetricSample>(CRASH, crash_name, 0, 0, 0, 0,
num_samples);
}
// static
std::unique_ptr<MetricSample> MetricSample::ParseCrash(
const std::string& serialized) {
std::vector<base::StringPiece> parts = base::SplitStringPiece(
serialized, " ", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
if (parts.size() != 1 && parts.size() != 2) {
return nullptr;
}
if (parts[0].empty()) {
return nullptr;
}
int num_samples = 1;
if (parts.size() == 2) {
if (!base::StringToInt(parts[1], &num_samples) || num_samples <= 0) {
return nullptr;
}
}
return CrashSample(std::string(parts[0]), num_samples);
}
// static
std::unique_ptr<MetricSample> MetricSample::HistogramSample(
const std::string& histogram_name,
int sample,
int min,
int max,
int bucket_count,
int num_samples) {
return std::make_unique<MetricSample>(HISTOGRAM, histogram_name, sample, min,
max, bucket_count, num_samples);
}
// static
std::unique_ptr<MetricSample> MetricSample::ParseHistogram(
const std::string& serialized_histogram) {
std::vector<base::StringPiece> parts = base::SplitStringPiece(
serialized_histogram, " ", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
if (parts.size() != 5 && parts.size() != 6) {
return nullptr;
}
int sample, min, max, bucket_count;
if (parts[0].empty() || !base::StringToInt(parts[1], &sample) ||
!base::StringToInt(parts[2], &min) ||
!base::StringToInt(parts[3], &max) ||
!base::StringToInt(parts[4], &bucket_count)) {
return nullptr;
}
int num_samples = 1;
if (parts.size() == 6) {
if (!base::StringToInt(parts[5], &num_samples) || num_samples <= 0) {
return nullptr;
}
}
return HistogramSample(std::string(parts[0]), sample, min, max, bucket_count,
num_samples);
}
// static
std::unique_ptr<MetricSample> MetricSample::SparseHistogramSample(
const std::string& histogram_name,
int sample,
int num_samples) {
return std::make_unique<MetricSample>(SPARSE_HISTOGRAM, histogram_name,
sample, 0, 0, 0, num_samples);
}
// static
std::unique_ptr<MetricSample> MetricSample::ParseSparseHistogram(
const std::string& serialized_histogram) {
std::vector<base::StringPiece> parts = base::SplitStringPiece(
serialized_histogram, " ", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
if (parts.size() != 2 && parts.size() != 3) {
return nullptr;
}
int sample;
if (parts[0].empty() || !base::StringToInt(parts[1], &sample))
return nullptr;
int num_samples = 1;
if (parts.size() == 3) {
if (!base::StringToInt(parts[2], &num_samples) || num_samples <= 0) {
return nullptr;
}
}
return SparseHistogramSample(std::string(parts[0]), sample, num_samples);
}
// static
std::unique_ptr<MetricSample> MetricSample::LinearHistogramSample(
const std::string& histogram_name,
int sample,
int max,
int num_samples) {
return std::make_unique<MetricSample>(LINEAR_HISTOGRAM, histogram_name,
sample, 0, max, 0, num_samples);
}
// static
std::unique_ptr<MetricSample> MetricSample::ParseLinearHistogram(
const std::string& serialized_histogram) {
std::vector<base::StringPiece> parts = base::SplitStringPiece(
serialized_histogram, " ", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
int sample, max;
if (parts.size() != 3 && parts.size() != 4) {
return nullptr;
}
if (parts[0].empty() || !base::StringToInt(parts[1], &sample) ||
!base::StringToInt(parts[2], &max)) {
return nullptr;
}
int num_samples = 1;
if (parts.size() == 4) {
if (!base::StringToInt(parts[3], &num_samples) || num_samples <= 0) {
return nullptr;
}
}
return LinearHistogramSample(std::string(parts[0]), sample, max, num_samples);
}
// static
std::unique_ptr<MetricSample> MetricSample::UserActionSample(
const std::string& action_name,
int num_samples) {
return std::make_unique<MetricSample>(USER_ACTION, action_name, 0, 0, 0, 0,
num_samples);
}
// static
std::unique_ptr<MetricSample> MetricSample::ParseUserAction(
const std::string& serialized) {
std::vector<base::StringPiece> parts = base::SplitStringPiece(
serialized, " ", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
if (parts.size() != 1 && parts.size() != 2) {
return nullptr;
}
if (parts[0].empty()) {
return nullptr;
}
int num_samples = 1;
if (parts.size() == 2) {
if (!base::StringToInt(parts[1], &num_samples) || num_samples <= 0) {
return nullptr;
}
}
return UserActionSample(std::string(parts[0]), num_samples);
}
bool MetricSample::IsEqual(const MetricSample& metric) {
return type_ == metric.type_ && name_ == metric.name_ &&
sample_ == metric.sample_ && min_ == metric.min_ &&
max_ == metric.max_ && bucket_count_ == metric.bucket_count_ &&
num_samples_ == metric.num_samples_;
}
} // namespace metrics
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