osuplusplus/include/config.hpp

#pragma once

#ifndef PP_DEBUG
#include <cinttypes>
#include <vector>

#include <SFML/Graphics/Color.hpp>
#endif

#include <util_stream_ops.hpp>
#include <string_util.hpp>

#include <va_args_util.hpp>

#define CONFIG(name, ...) \
    struct name {\
        __VA_ARGS__\
    };

#define SECTION(name, type_name, ...) \
    struct type_name {\
        __VA_ARGS__\
    } name;

#define SECTION_LIST(name, type) std::vector<type> name;

#define VAR_UINT(section, name) uint name;
#define VAR_UINT_P(section, name, prefix) VAR_UINT(section, name)
#define VAR_UINT_D(section, name, default) uint name = default;

#define VAR_INT(section, name) int name;
#define VAR_INT_P(section, name, prefix) VAR_INT(section, name)
#define VAR_INT_D(section, name, default) int name = default;

#define VAR_STRING(section, name) std::string name;
#define VAR_STRING_P(section, name, prefix) VAR_STRING(section, name)
#define VAR_STRING_D(section, name, default) std::string name = default;

#define VAR_BOOL(section, name) bool name;
#define VAR_BOOL_P(section, name, prefix) VAR_BOOL(section, name)
#define VAR_BOOL_D(section, name, default) bool name = default;

#define VAR_FLOAT(section, name) double name;
#define VAR_FLOAT_P(section, name, prefix) VAR_FLOAT(section, name)
#define VAR_FLOAT_D(section, name, default) double name = default;

#define VAR_COLOUR(section, name) sf::Color name;
#define VAR_COLOUR_P(section, name, prefix) VAR_COLOUR(section, name)
#define VAR_COLOUR_D(section, name, default) sf::Color name = default;

#define VAR_LIST(section, name, type) std::vector<type> name;
#define VAR_LIST_SEP(section, name, type, sep) std::vector<type> name;
#define VAR_LIST_SEP_P(section, name, type, sep, prefix) std::vector<type> name;
#define VAR_LIST_NUMBERED(section, name, type) std::vector<type> name;

#define ENUM(name, ...) \
    enum class name {\
        __VA_ARGS__\
    };\
    ENUM_STREAM_OPS(name, __VA_ARGS__)

#define VAR_ENUM(section, name, enum_type) enum_type name;
#define VAR_ENUM_P(section, name, prefix) VAR_ENUM(section, name)
#define VAR_ENUM_D(section, name, enum_type, default) enum_type name = enum_type::default;

#define ENUM_TO_STRING_CASE(name, e) case name::e: os << #e; break;
#define ENUM_FROM_STRING(name, e) if (input == #e) { en = name::e; hasBeenSet = true; }

#define ENUM_STREAM_OPS(name, ...) \
    inline std::ostream &operator<<(std::ostream &os, const name &en) {\
        switch (en) {\
            FOR_EACH(ENUM_TO_STRING_CASE, name, __VA_ARGS__)\
        }\
        return os;\
    }\
    \
    inline std::istream &operator>>(std::istream &is, name &en) {\
        std::string input;\
        is >> input;\
        if (isInt(input)) {\
            try {\
                int inputNum = std::stoul(input);\
                if (inputNum >= ARG_COUNT(__VA_ARGS__)) {\
                    /* TODO this and the comment below give me -Wmaybe-uninitialized
                     * which I would say is the expected outcome in this case
                     * but what do I know; find a way to silence the warning
                     * while still retaining this behaviour */\
                    is.setstate(std::ios_base::failbit);\
                } else {\
                    en = static_cast<name>(inputNum);\
                }\
            } catch (std::invalid_argument const&) {\
                /* the comment below */\
                is.setstate(std::ios_base::failbit);\
            }\
        } else {\
            toUpper(input);\
            bool hasBeenSet = false;\
            FOR_EACH(ENUM_FROM_STRING, name, __VA_ARGS__)\
            if (!hasBeenSet) {\
                is.setstate(std::ios_base::failbit);\
            }\
        }\
        return is;\
    }

#define STRUCT(name, ...) \
    struct name {\
        __VA_ARGS__\
    };

#define VAR_STRUCT(section, name, struct_type) struct_type name;
#define VAR_STRUCT_P(section, name, prefix) VAR_STRUCT(section, name)
#define VAR_STRUCT_D(section, name, struct_type, default) struct_type name = default;

#define STRUCT_FIELD_TO_STRING(name, field) os << "  " << #field << ": " << str.field << "\n";
#define STRUCT_FROM_STRING(name, field) \
    std::getline(is, input, ',');\
    ss = std::stringstream(input);\
    ss >> str.field;

#define STRUCT_INPUT_STREAM_OP(name, ...) \
    inline std::istream &operator>>(std::istream &is, name &str) {\
        std::string input;\
        std::stringstream ss;\
        FOR_EACH(STRUCT_FROM_STRING, name, __VA_ARGS__)\
        return is;\
    }

#define STRUCT_OUTPUT_STREAM_OP(name, ...) \
    inline std::ostream &operator<<(std::ostream &os, const name &str) {\
        os << #name << " {\n";\
            FOR_EACH(STRUCT_FIELD_TO_STRING, name, __VA_ARGS__)\
        os << "}";\
        return os;\
    }

#define STRUCT_STREAM_OPS(name, ...) \
    STRUCT_INPUT_STREAM_OP(name, __VA_ARGS__) \
    STRUCT_OUTPUT_STREAM_OP(name, __VA_ARGS__)

#include <config_def.hpp>

#undef CONFIG
#undef SECTION
#undef SECTION_LIST

#undef VAR_UINT
#undef VAR_UINT_P
#undef VAR_UINT_D

#undef VAR_INT
#undef VAR_INT_P
#undef VAR_INT_D

#undef VAR_STRING
#undef VAR_STRING_P
#undef VAR_STRING_D

#undef VAR_BOOL
#undef VAR_BOOL_P
#undef VAR_BOOL_D

#undef VAR_FLOAT
#undef VAR_FLOAT_P
#undef VAR_FLOAT_D

#undef VAR_COLOUR
#undef VAR_COLOUR_P
#undef VAR_COLOUR_D

#undef ENUM
#undef VAR_ENUM
#undef VAR_ENUM_P
#undef VAR_ENUM_D

#undef ENUM_TO_STRING_CASE
#undef ENUM_FROM_STRING

#undef ENUM_STREAM_OPS

#undef STRUCT
#undef VAR_STRUCT
#undef VAR_STRUCT_P
#undef VAR_STRUCT_D

#undef STRUCT_FIELD_TO_STRING
#undef STRUCT_FROM_STRING

#undef STRUCT_INPUT_STREAM_OP
#undef STRUCT_OUTPUT_STREAM_OP
#undef STRUCT_STREAM_OPS

#undef VAR_LIST
#undef VAR_LIST_SEP
#undef VAR_LIST_SEP_P
#undef VAR_LIST_NUMBERED