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#pragma once
#include <cstdint>
namespace nes
{
class button_mask
{
std::uint8_t raw_value_{ 0 };
public:
constexpr explicit button_mask() = default;
static constexpr auto from_raw_value(std::uint8_t const raw_value) -> button_mask
{
return button_mask{ raw_value };
}
constexpr auto add(button_mask const other) -> void { raw_value_ |= other.raw_value_; }
constexpr auto remove(button_mask const other) -> void { raw_value_ ^= other.raw_value_; }
constexpr auto contains(button_mask const other) const -> bool { return (raw_value_ & other.raw_value_) == other.raw_value_; }
constexpr auto is_empty() const -> bool { return raw_value_ == 0; }
constexpr auto get_raw_value() const -> std::uint8_t { return raw_value_; }
private:
constexpr explicit button_mask(std::uint8_t const raw_value)
: raw_value_{ raw_value }
{
}
};
namespace buttons
{
static constexpr auto a = button_mask::from_raw_value(1 << 0);
static constexpr auto b = button_mask::from_raw_value(1 << 1);
static constexpr auto select = button_mask::from_raw_value(1 << 2);
static constexpr auto start = button_mask::from_raw_value(1 << 3);
static constexpr auto up = button_mask::from_raw_value(1 << 4);
static constexpr auto down = button_mask::from_raw_value(1 << 5);
static constexpr auto left = button_mask::from_raw_value(1 << 6);
static constexpr auto right = button_mask::from_raw_value(1 << 7);
} // namespace buttons
} // namespace nes
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