base/debug/trace_event_argument.cc

   1 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/debug/trace_event_argument.h"
   6
   7 #include "base/json/json_writer.h"
   8 #include "base/values.h"
   9
  10 namespace base {
  11 namespace debug {
  12
  13 TracedValue::TracedValue() : root_(new DictionaryValue()) {
  14   stack_.push_back(root_.get());
  15 }
  16
  17 TracedValue::~TracedValue() {
  18   DCHECK_EQ(1u, stack_.size());
  19 }
  20
  21 void TracedValue::SetInteger(const char* name, int value) {
  22   GetCurrentDictionary()->SetInteger(name, value);
  23 }
  24
  25 void TracedValue::SetDouble(const char* name, double value) {
  26   GetCurrentDictionary()->SetDouble(name, value);
  27 }
  28
  29 void TracedValue::SetBoolean(const char* name, bool value) {
  30   GetCurrentDictionary()->SetBoolean(name, value);
  31 }
  32
  33 void TracedValue::SetString(const char* name, const std::string& value) {
  34   GetCurrentDictionary()->SetString(name, value);
  35 }
  36
  37 void TracedValue::SetValue(const char* name, Value* value) {
  38   GetCurrentDictionary()->Set(name, value);
  39 }
  40
  41 void TracedValue::BeginDictionary(const char* name) {
  42   DictionaryValue* dictionary = new DictionaryValue();
  43   GetCurrentDictionary()->Set(name, dictionary);
  44   stack_.push_back(dictionary);
  45 }
  46
  47 void TracedValue::BeginArray(const char* name) {
  48   ListValue* array = new ListValue();
  49   GetCurrentDictionary()->Set(name, array);
  50   stack_.push_back(array);
  51 }
  52
  53 void TracedValue::EndDictionary() {
  54   DCHECK_GT(stack_.size(), 1u);
  55   DCHECK(GetCurrentDictionary());
  56   stack_.pop_back();
  57 }
  58
  59 void TracedValue::AppendInteger(int value) {
  60   GetCurrentArray()->AppendInteger(value);
  61 }
  62
  63 void TracedValue::AppendDouble(double value) {
  64   GetCurrentArray()->AppendDouble(value);
  65 }
  66
  67 void TracedValue::AppendBoolean(bool value) {
  68   GetCurrentArray()->AppendBoolean(value);
  69 }
  70
  71 void TracedValue::AppendString(const std::string& value) {
  72   GetCurrentArray()->AppendString(value);
  73 }
  74
  75 void TracedValue::BeginArray() {
  76   ListValue* array = new ListValue();
  77   GetCurrentArray()->Append(array);
  78   stack_.push_back(array);
  79 }
  80
  81 void TracedValue::BeginDictionary() {
  82   DictionaryValue* dictionary = new DictionaryValue();
  83   GetCurrentArray()->Append(dictionary);
  84   stack_.push_back(dictionary);
  85 }
  86
  87 void TracedValue::EndArray() {
  88   DCHECK_GT(stack_.size(), 1u);
  89   DCHECK(GetCurrentArray());
  90   stack_.pop_back();
  91 }
  92
  93 DictionaryValue* TracedValue::GetCurrentDictionary() {
  94   DCHECK(!stack_.empty());
  95   DictionaryValue* dictionary = NULL;
  96   stack_.back()->GetAsDictionary(&dictionary);
  97   DCHECK(dictionary);
  98   return dictionary;
  99 }
 100
 101 ListValue* TracedValue::GetCurrentArray() {
 102   DCHECK(!stack_.empty());
 103   ListValue* list = NULL;
 104   stack_.back()->GetAsList(&list);
 105   DCHECK(list);
 106   return list;
 107 }
 108
 109 void TracedValue::AppendAsTraceFormat(std::string* out) const {
 110   std::string tmp;
 111   JSONWriter::Write(stack_.front(), &tmp);
 112   *out += tmp;
 113   DCHECK_EQ(1u, stack_.size()) << tmp;
 114 }
 115
 116 }  // namespace debug
 117 }  // namespace base