Packed Restaurant

restaurant.h

    class PackedRestaurantRecord {
    public:
        //MAD BIT TWIDDLING ~~~ AVERT YOUR GAZE!
        uint8_t getBlockNum() { 
            return (C & 0x0F) | (D & 0xF0);
        }
        void setBlockNum(uint8_t n) {
            C = (C & 0xF0) | (n & 0x0F);
            D = (D & 0x0F) | (n & 0xF0);
        }
        uint8_t getBlockInx() {
            return (C & 0x70) >> 4;
        }
        void setBlockInx(uint8_t i) {
            C = (C & 0x8F) | ((i & 0x07) << 4);
        }
        uint32_t getDistance() {
            int32_t a = A;
            int32_t b = B;
            return a | (b << 8) | ((C & 0x80) ? 0x00010000 : 0x0);
        }
        void setDistance(uint32_t d) {
            A = (d & 0x000000FF);
            B = (d & 0x0000FF00) >> 8;
            C &= 0x7F;
            if (d & 0x00010000)
                C |= 0x80;
        }
        uint8_t getRating() {
            return D & 0x0F;
        }
        void setRating(uint8_t r) {
            D = (D & 0xF0) | (r & 0x0F);
        }

    private:
        //
        // | BlockNum | BlockInx | Distance | Rating |
        //     N            I          D        R
        // 
        //      MOST SIGNIGICANT:
        // -> Stored as: DDDD DDDD  DDDD DDDD  DIII NNNN  NNNN RRRR
        //                   A          B          C          D
        uint8_t A, B, C, D;
    };