snowboy-options.h

#pragma once
#include <cstdint>
#include <map>
#include <string>
#include <vector>
 
namespace snowboy {
    struct OptionsItf {
        virtual void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, bool* ptr) = 0;
        virtual void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, int32_t* ptr) = 0;
        virtual void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, uint32_t* ptr) = 0;
        virtual void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, int64_t* ptr) = 0;
        virtual void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, uint64_t* ptr) = 0;
        virtual void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, float* ptr) = 0;
        virtual void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, std::string* ptr) = 0;
        virtual void Remove(const std::string& prefix, const std::string& name) = 0;
        virtual ~OptionsItf() {}
    };
 
    struct OptionInfo;
    class ParseOptions : public OptionsItf {
        bool m_opt_print_usage;
        std::string m_opt_config_file;
        std::string m_usage;
        std::vector<std::string> m_arguments;
        std::map<std::string, OptionInfo> m_options;
        int m_verbose_level;
 
        void Register(const std::string& prefix, const std::string& name, const std::string usage_info, OptionInfo&& info);
 
    public:
        ParseOptions(const std::string& usage);
        ~ParseOptions();
 
        void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, bool* ptr) override;
        void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, int32_t* ptr) override;
        void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, uint32_t* ptr) override;
        void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, int64_t* ptr) override;
        void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, uint64_t* ptr) override;
        void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, float* ptr) override;
        void Register(const std::string& prefix, const std::string& name, const std::string& usage_info, std::string* ptr) override;
        void Remove(const std::string& prefix, const std::string& name) override;
 
        std::string GetArgument(size_t index) const;
        bool IsValidOption(const std::string& opt) const;
        std::string NormalizeOptionName(const std::string& option) const;
        void ParseOneOption(const std::string& opt, std::string* out_name, std::string* out_value) const;
        void PrintUsage(bool);
        void ReadArguments(int argc, char const* const* argv);
        void ReadConfigFile(const std::string& filename);
        void ReadConfigString(const std::string& config);
    };
} // namespace snowboy