whatwg/encoding/encoding_defs.hpp

#pragma once
 
// https://encoding.spec.whatwg.org/
// https://triple-underscore.github.io/Encoding-ja.html
 
#include <array>
#include <cstdint>
#include <variant>
 
namespace wordring::whatwg::encoding
{
    // 4.1. Encoders and decoders ---------------------------------------------
 
    class encoder {};
    class decoder {};
 
    class result_finished {};
    class result_continue {};
 
    using result_code_point = uint32_t;
    using result_code_points_2 = std::array<uint32_t, 2>;
 
    using result_byte = uint8_t;
    using result_bytes_2 = std::array<uint8_t, 2>;
    using result_bytes_3 = std::array<uint8_t, 3>;
    using result_bytes_4 = std::array<uint8_t, 4>;
 
    struct result_error
    {
        result_error() : code_point{ 0xFFFFFFFFu } {}
        result_error(uint32_t cp) : code_point{ cp } {}
        uint32_t code_point;
    };
 
    using result_value = std::variant<
        result_finished,      // 0.
        result_continue,      // 1.
        result_code_point,    // 2.
        result_code_points_2, // 3.
        result_byte,          // 4.
        result_bytes_2,       // 5.
        result_bytes_3,       // 6.
        result_bytes_4,       // 7.
        result_error          // 8.
    >;
 
    enum class error_mode_name : uint32_t
    {
        None = 0,
        Replacement = 1,
        Fatal = 2,
        Html = 3
    };
 
    // 4.2. Names and labels --------------------------------------------------
 
    enum class encoding_name : uint32_t
    {
        UTF_8 = 1,
 
        // Legacy single - byte encodings
        IBM866,
        ISO_8859_2,
        ISO_8859_3,
        ISO_8859_4,
        ISO_8859_5,
        ISO_8859_6,
        ISO_8859_7,
        ISO_8859_8,
        ISO_8859_8_I,
        ISO_8859_10,
        ISO_8859_13,
        ISO_8859_14,
        ISO_8859_15,
        ISO_8859_16,
        KOI8_R,
        KOI8_U,
        macintosh,
        windows_874,
        windows_1250,
        windows_1251,
        windows_1252,
        windows_1253,
        windows_1254,
        windows_1255,
        windows_1256,
        windows_1257,
        windows_1258,
        x_mac_cyrillic,
 
        // Legacy multi - byte Chinese(simplified) encodings
        GBK,
        gb18030,
 
        // Legacy multi - byte Chinese(traditional) encodings
        Big5,
 
        // Legacy multi - byte Japanese encodings
        EUC_JP,
        ISO_2022_JP,
        Shift_JIS,
 
        // Legacy multi - byte Korean encodings
        EUC_KR,
 
        // Legacy miscellaneous encodings
        replacement,
        UTF_16BE,
        UTF_16LE,
        x_user_defined,
    };
}
 
namespace wordring::whatwg
{
    using encoding_name = encoding::encoding_name;
}