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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/metrics/histogram_base.h" | 5 #include "base/metrics/histogram_base.h" |
6 | 6 |
7 #include <climits> | 7 #include <climits> |
8 | 8 |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "base/json/json_string_value_serializer.h" | 10 #include "base/json/json_string_value_serializer.h" |
11 #include "base/memory/scoped_ptr.h" | 11 #include "base/memory/scoped_ptr.h" |
12 #include "base/metrics/histogram.h" | 12 #include "base/metrics/histogram.h" |
13 #include "base/metrics/histogram_samples.h" | 13 #include "base/metrics/histogram_samples.h" |
14 #include "base/metrics/sparse_histogram.h" | 14 #include "base/metrics/sparse_histogram.h" |
15 #include "base/pickle.h" | 15 #include "base/pickle.h" |
16 #include "base/process_util.h" | 16 #include "base/process_util.h" |
| 17 #include "base/stringprintf.h" |
17 #include "base/values.h" | 18 #include "base/values.h" |
18 | 19 |
19 namespace base { | 20 namespace base { |
20 | 21 |
21 std::string HistogramTypeToString(HistogramType type) { | 22 std::string HistogramTypeToString(HistogramType type) { |
22 switch(type) { | 23 switch(type) { |
23 case HISTOGRAM: | 24 case HISTOGRAM: |
24 return "HISTOGRAM"; | 25 return "HISTOGRAM"; |
25 case LINEAR_HISTOGRAM: | 26 case LINEAR_HISTOGRAM: |
26 return "LINEAR_HISTOGRAM"; | 27 return "LINEAR_HISTOGRAM"; |
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117 DictionaryValue root; | 118 DictionaryValue root; |
118 root.SetString("name", histogram_name()); | 119 root.SetString("name", histogram_name()); |
119 root.SetInteger("count", count); | 120 root.SetInteger("count", count); |
120 root.SetInteger("flags", flags()); | 121 root.SetInteger("flags", flags()); |
121 root.Set("params", parameters.release()); | 122 root.Set("params", parameters.release()); |
122 root.Set("buckets", buckets.release()); | 123 root.Set("buckets", buckets.release()); |
123 root.SetInteger("pid", GetCurrentProcId()); | 124 root.SetInteger("pid", GetCurrentProcId()); |
124 serializer.Serialize(root); | 125 serializer.Serialize(root); |
125 } | 126 } |
126 | 127 |
| 128 void HistogramBase::WriteAsciiBucketGraph(double current_size, |
| 129 double max_size, |
| 130 std::string* output) const { |
| 131 const int k_line_length = 72; // Maximal horizontal width of graph. |
| 132 int x_count = static_cast<int>(k_line_length * (current_size / max_size) |
| 133 + 0.5); |
| 134 int x_remainder = k_line_length - x_count; |
| 135 |
| 136 while (0 < x_count--) |
| 137 output->append("-"); |
| 138 output->append("O"); |
| 139 while (0 < x_remainder--) |
| 140 output->append(" "); |
| 141 } |
| 142 |
| 143 const std::string HistogramBase::GetSimpleAsciiBucketRange( |
| 144 Sample sample) const { |
| 145 std::string result; |
| 146 if (kHexRangePrintingFlag & flags()) |
| 147 StringAppendF(&result, "%#x", sample); |
| 148 else |
| 149 StringAppendF(&result, "%d", sample); |
| 150 return result; |
| 151 } |
| 152 |
| 153 void HistogramBase::WriteAsciiBucketValue(Count current, |
| 154 double scaled_sum, |
| 155 std::string* output) const { |
| 156 StringAppendF(output, " (%d = %3.1f%%)", current, current/scaled_sum); |
| 157 } |
| 158 |
127 } // namespace base | 159 } // namespace base |
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