Json telemetry

apps/RenderCadenceCompositor/json/JsonWriter.h

@@ -0,0 +1,60 @@
+#pragma once
+
+#include <cstdint>
+#include <sstream>
+#include <string>
+
+namespace RenderCadenceCompositor
+{
+class JsonWriter
+{
+public:
+	void BeginObject();
+	void EndObject();
+	void BeginArray();
+	void EndArray();
+
+	void Key(const std::string& name);
+	void String(const std::string& value);
+	void Bool(bool value);
+	void Null();
+	void Int(int64_t value);
+	void UInt(uint64_t value);
+	void Double(double value);
+
+	void KeyString(const std::string& name, const std::string& value);
+	void KeyBool(const std::string& name, bool value);
+	void KeyNull(const std::string& name);
+	void KeyInt(const std::string& name, int64_t value);
+	void KeyUInt(const std::string& name, uint64_t value);
+	void KeyDouble(const std::string& name, double value);
+
+	std::string StringValue() const;
+	void Reset();
+
+	static std::string EscapeString(const std::string& value);
+
+private:
+	enum class ScopeKind
+	{
+		Object,
+		Array
+	};
+
+	struct Scope
+	{
+		ScopeKind kind = ScopeKind::Object;
+		bool first = true;
+		bool expectingValue = false;
+	};
+
+	void BeginValue();
+	void BeginKey();
+	void PushScope(ScopeKind kind);
+	void PopScope(ScopeKind kind);
+
+	std::ostringstream mStream;
+	Scope mScopes[32];
+	int mScopeDepth = 0;
+};
+}