Inindo S-RAM structure

#ifndef inc_save
#define inc_save

#include "types.h"
#include "enumerations.h"

#pragma pack(push)
#pragma pack(1)
namespace inindo
{
    enum lineup_t : u08
    {
        front_right,
        front_center,
        front_left,
        rear_right,
        rear_center,
        rear_left,
    };

    enum location_type_t : u08
    {
        castle,
        inn,
        tea,
        unk,
    };

    enum game_mode_t : u08
    {
        normal,
        sorcerer,
    };

    struct save_data_t
    {
        // 000
        u08 head[2];
        struct date_t
        {
            // 002
            u08 year;
            // 003
            u08 month;
            // 004
            u08 day;
            // 005
            u08 time;
        } date;
        // 006
        u08 unk0;
        // 007
        // energy left before rest needed
        // max 180 = 60 time units * 3 days
        u08 strength;
        // 008
        u08 unk1a;
        // 009
        // high nibble = step (8)
        // low nibble = facing direction (NWES = 0123)
        u08 unk1b;
        // 00a
        u08 unk1c;
        // 00b
        u16 unk2[2];
        // 00f
        struct party_t
        {
            // 00f
            struct location_t
            {
                // world (nihon) map position
                // 00f
                u16 w[4];
                // sub-map position (town, dungeon, ...)
                // 017
                u16 x;
                // 019
                u16 y;
            } location;
            // 01b
            u16 gold;
            // 01d
            u08 size;
            // 01e
            u08 member_id[3];
            // combat formation
            // 021
            lineup_t lineup[3];
            // 024
            struct status_flags_t
            {
                // poison shows over injury
                u08 poison : 1;
                u08 injury : 1;
                // aphrodisia (eel extract) shows over poison or injury
                // makes you walk in random directions (?)
                // shows as "blind" in the US version
                // has own icon in the Japanese version
                u08 aphrodisia : 1;
                // other bits show up as injury (?)
                u08 unk45678 : 5;
            } status[3];
            // 027
            item_id_t inventory[3][15];
        } party;
        //
        struct pawn_t
        {
            u08 thousand_gold;
            item_id_t slot[31];
        } pawn;
        //
        struct bingo_t
        {
            u16 lowclass_chips;
            u16 highclass_chips;
        } bingo;
        // 078
        u08 player_level;
        // 079
        u16 unk3[24];
        // 0a9
        char name[11];
        // 0b4
        struct character_status_t
        {
            // static (ROM) character description index
            u08 character_index;
            // linked list starting from location flags
            // status index, not description index
            u08 with_index;
            u16 max_health;
            u16 health;
            u16 max_energy;
            u16 energy;
            u16 exp_needed;
            u08 level;
            struct flags_bitset_t
            {
                location_type_t location_type : 2;
                u08 unk345678 : 6;
            } flags;
            u08 trust;
            u08 intelligence;
            u08 speed;
            // 0c0
            u08 luck;
            u16 magic;
            u08 defense;
            u08 resist;
            u08 power;
            item_id_t equipped[5];
            u08 ai_data[3];
            struct ai_status_t
            {
                character_ai_command_t command : 3;
                u08 unk : 5;
            } ai_status;
        } status[63];
        // 894
        u16 unk4a[52];
        // 8fc
        u16 unk4b[16];
        // 91c
        struct province_t
        {
            u08 ruler;
            u08 daimyo;
            u16 gold;
            u16 rice;
            u16 soldiers;
            u08 arms;
            u08 training;
            u08 person[3];
            u08 trust[3];
            struct ai_status_t
            {
                province_id_t target_province : 5;
                province_ai_algorithm_t algorithm : 3;
                u08 people : 2;
                province_ai_command_t command : 2;
                u08 unk : 4;
            } ai_status;
        } province[30];
        // b38
        struct location_flags_t
        {
            // linked list end via status indices
            u08 visitor : 8;
            u08 unk1 : 8;
            u08 unk2 : 7;
            // the player has visited this location
            u08 visited : 1;
        } location[48];
        // bc8
        // most even bytes = 0, few change to 2
        u08 unk5[828];
        // f04
        // game flags
        // 0 - 17: 0 (null), 1 (active) or 2 (complete)
        // 18 is game mode: 0 (normal), 1 (magical)
        // 19 is unknown
        u08 flag[20];
    };

    // container that implements checksum functions
    struct save_container_t
    {
        u16 compute_checksum(const void *pdata, int length)
        {
            u08 *p = (u08 *)pdata;
            u16 checksum = 0;
            for (int i = 0; i < length; i++) {
                checksum += p[i];
            }
            return checksum;
        }

        bool fix_checksum()
        {
            const int game_data_size = sizeof(save_data_t);
            ASSERT(game_data_size == 3864);
            u16 new_checksum = compute_checksum(&save_data, game_data_size);
            if (new_checksum == checksum) {
                return false;
            } else {
                checksum = new_checksum;
                return true;
            }
        }

        bool is_dirty()
        {
            const int game_data_size = sizeof(save_data_t);
            ASSERT(game_data_size == 3864);
            u16 new_checksum = compute_checksum(&save_data, game_data_size);
            return (new_checksum != checksum);
        }

        void write(const char *filename);

        // 000
        save_data_t save_data;
        // f18
        u16 checksum;
        // f1a
        char koei[4];
        // f1e
        u08 padding[226];
    };
};
#pragma pack(pop)

#endif