mirror of https://github.com/stella-emu/stella.git
100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
//============================================================================
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//
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// SSSS tt lll lll
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// SS SS tt ll ll
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// SS tttttt eeee ll ll aaaa
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// SSSS tt ee ee ll ll aa
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// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2022 by Bradford W. Mott, Stephen Anthony
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// and the Stella Team
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//
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// See the file "License.txt" for information on usage and redistribution of
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// this file, and for a DISCLAIMER OF ALL WARRANTIES.
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//============================================================================
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#ifndef KEY_VALUE_REPOSITORY_FILE_HXX
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#define KEY_VALUE_REPOSITORY_FILE_HXX
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#include <sstream>
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#include "KeyValueRepository.hxx"
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#include "Logger.hxx"
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#include "FSNode.hxx"
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#include "bspf.hxx"
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template<class T>
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class KeyValueRepositoryFile : public KeyValueRepository {
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public:
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explicit KeyValueRepositoryFile(const FilesystemNode& node);
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std::map<string, Variant> load() override;
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bool save(const std::map<string, Variant>& values) override;
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protected:
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const FilesystemNode& myNode;
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};
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///////////////////////////////////////////////////////////////////////////////
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// IMPLEMENTATION
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///////////////////////////////////////////////////////////////////////////////
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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template<class T>
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KeyValueRepositoryFile<T>::KeyValueRepositoryFile(const FilesystemNode& node)
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: myNode{node}
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{}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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template<class T>
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std::map<string, Variant> KeyValueRepositoryFile<T>::load()
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{
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if (!myNode.exists()) return std::map<string, Variant>();
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stringstream in;
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try {
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myNode.read(in);
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return T::load(in);
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}
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catch (const runtime_error& err) {
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Logger::error(err.what());
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return std::map<string, Variant>();
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}
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catch (...) {
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return std::map<string, Variant>();
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}
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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template<class T>
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bool KeyValueRepositoryFile<T>::save(const std::map<string, Variant>& values)
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{
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if (values.size() == 0) return true;
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stringstream out;
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try {
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T::save(out, values);
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myNode.write(out);
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return true;
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}
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catch (const runtime_error& err) {
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Logger::error(err.what());
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return false;
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}
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catch (...)
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{
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return false;
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}
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}
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#endif // KEY_VALUE_REPOSITORY_FILE
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