85 lines
1.5 KiB
C++
85 lines
1.5 KiB
C++
/*
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* Yaml.h
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*
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* Created on: 06.10.2012
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* Author: Felix
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*/
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#ifndef DG_YAML_H_
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#define DG_YAML_H_
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#include <string>
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#include <fstream>
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#include <yaml-cpp/yaml.h>
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#include <SFML/System.hpp>
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#include "Log.h"
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/**
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* Interface to a YAML file.
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*/
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class Yaml {
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// Public functions.
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public:
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explicit Yaml(const std::string& filename);
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~Yaml();
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std::string getFilename() const;
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static void setFolder(const std::string& folder);
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template <typename T>
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T get(const std::string& key, const T& defaultValue) const;
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// Private variables.
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private:
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static std::string mFolder;
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std::string mFilename;
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std::ifstream mFile;
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YAML::Node mNode;
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};
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/**
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* Stream output operators to specialize Yaml::get for other types.
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* Error handling is done in Yaml::get.
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*/
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namespace {
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void operator>>(const YAML::Node& node, sf::Vector2i& vector) {
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node[0] >> vector.x;
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node[1] >> vector.y;
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}
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void operator>>(const YAML::Node& node, sf::Vector2f& vector) {
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node[0] >> vector.x;
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node[1] >> vector.y;
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}
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};
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/**
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* Gets a value of a specified type by key. Returns default value on error.
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*
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* @param key The string by which to select the return value.
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* @tparam T The type of the return value.
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* @return The value of the specified key.
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*/
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template <typename T>
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T Yaml::get(const std::string& key, const T& defaultValue) const {
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try {
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if (const YAML::Node* node = mNode.FindValue(key)) {
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T value;
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*node >> value;
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return value;
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}
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else {
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return defaultValue;
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}
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}
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catch(YAML::Exception&) {
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return defaultValue;
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}
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};
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#endif /* DG_YAML_H_ */
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