Common: add ParamPackage

src/common/param_package.h

@@ -0,0 +1,40 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <initializer_list>
+#include <string>
+#include <unordered_map>
+
+namespace Common {
+
+/// A string-based key-value container supporting serializing to and deserializing from a string
+class ParamPackage {
+public:
+    using DataType = std::unordered_map<std::string, std::string>;
+
+    ParamPackage() = default;
+    explicit ParamPackage(const std::string& serialized);
+    ParamPackage(std::initializer_list<DataType::value_type> list);
+    ParamPackage(const ParamPackage& other) = default;
+    ParamPackage(ParamPackage&& other) = default;
+
+    ParamPackage& operator=(const ParamPackage& other) = default;
+    ParamPackage& operator=(ParamPackage&& other) = default;
+
+    std::string Serialize() const;
+    std::string Get(const std::string& key, const std::string& default_value) const;
+    int Get(const std::string& key, int default_value) const;
+    float Get(const std::string& key, float default_value) const;
+    void Set(const std::string& key, const std::string& value);
+    void Set(const std::string& key, int value);
+    void Set(const std::string& key, float value);
+    bool Has(const std::string& key) const;
+
+private:
+    DataType data;
+};
+
+} // namespace Common