1 // Copyright 2016 the V8 project 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 #ifndef V8_TRACING_TRACED_VALUE_H_ 6 #define V8_TRACING_TRACED_VALUE_H_ 7 8 #include <stddef.h> 9 #include <memory> 10 #include <string> 11 #include <vector> 12 13 #include "include/v8-platform.h" 14 #include "src/base/macros.h" 15 16 namespace v8 { 17 namespace tracing { 18 19 class TracedValue : public ConvertableToTraceFormat { 20 public: 21 ~TracedValue() override; 22 23 static std::unique_ptr<TracedValue> Create(); 24 25 void EndDictionary(); 26 void EndArray(); 27 28 // These methods assume that |name| is a long lived "quoted" string. 29 void SetInteger(const char* name, int value); 30 void SetDouble(const char* name, double value); 31 void SetBoolean(const char* name, bool value); 32 void SetString(const char* name, const char* value); SetString(const char * name,const std::string & value)33 void SetString(const char* name, const std::string& value) { 34 SetString(name, value.c_str()); 35 } 36 void BeginDictionary(const char* name); 37 void BeginArray(const char* name); 38 39 void AppendInteger(int); 40 void AppendDouble(double); 41 void AppendBoolean(bool); 42 void AppendString(const char*); AppendString(const std::string & value)43 void AppendString(const std::string& value) { AppendString(value.c_str()); } 44 void BeginArray(); 45 void BeginDictionary(); 46 47 // ConvertableToTraceFormat implementation. 48 void AppendAsTraceFormat(std::string* out) const override; 49 50 private: 51 TracedValue(); 52 53 void WriteComma(); 54 void WriteName(const char* name); 55 56 #ifdef DEBUG 57 // In debug builds checks the pairings of {Begin,End}{Dictionary,Array} 58 std::vector<bool> nesting_stack_; 59 #endif 60 61 std::string data_; 62 bool first_item_; 63 64 DISALLOW_COPY_AND_ASSIGN(TracedValue); 65 }; 66 67 } // namespace tracing 68 } // namespace v8 69 70 #endif // V8_TRACING_TRACED_VALUE_H_ 71