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// Copyright (c) 2012 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 "base/metrics/histogram_base.h"
#include <climits>
#include "base/logging.h"
#include "base/json/json_string_value_serializer.h"
#include "base/memory/scoped_ptr.h"
#include "base/values.h"
namespace base {
std::string HistogramTypeToString(HistogramType type) {
switch(type) {
case HISTOGRAM:
return "HISTOGRAM";
case LINEAR_HISTOGRAM:
return "LINEAR_HISTOGRAM";
case BOOLEAN_HISTOGRAM:
return "BOOLEAN_HISTOGRAM";
case CUSTOM_HISTOGRAM:
return "CUSTOM_HISTOGRAM";
case SPARSE_HISTOGRAM:
return "SPARSE_HISTOGRAM";
default:
NOTREACHED();
}
return "UNKNOWN";
}
const HistogramBase::Sample HistogramBase::kSampleType_MAX = INT_MAX;
HistogramBase::HistogramBase(const std::string& name)
: histogram_name_(name),
flags_(kNoFlags) {}
HistogramBase::~HistogramBase() {}
void HistogramBase::SetFlags(int32 flags) {
flags_ |= flags;
}
void HistogramBase::ClearFlags(int32 flags) {
flags_ &= ~flags;
}
void HistogramBase::WriteJSON(std::string* output) const {
Count count;
scoped_ptr<ListValue> buckets(new ListValue());
GetCountAndBucketData(&count, buckets.get());
scoped_ptr<DictionaryValue> parameters(new DictionaryValue());
GetParameters(parameters.get());
JSONStringValueSerializer serializer(output);
DictionaryValue root;
root.SetString("name", histogram_name());
root.SetInteger("count", count);
root.SetInteger("flags", flags());
root.Set("params", parameters.release());
root.Set("buckets", buckets.release());
serializer.Serialize(root);
}
} // namespace base
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