OSDev

#pragma once

#include <memory>

#define SFS12_BOOT_SECTOR_IDENTIFIER                     "SFS12\0"
#define SFS12_BOOT_SECTOR_SIGNATURE                        0xAA55
#define SFS12_BOOT_SECTOR_SIGNATURE_BYTE1                  0x55
#define SFS12_BOOT_SECTOR_SIGNATURE_BYTE2                  0xAA

#define SFS12_CLUSTERS_LIST_FREE                        0x0000
#define SFS12_CLUSTERS_LIST_ERROR                        0x0FF6
#define SFS12_CLUSTERS_LIST_END_CHAIN_BOOT                  0x0FF7
#define SFS12_CLUSTERS_LIST_END_CHAIN_RESERVED               0x0FF8
#define SFS12_CLUSTERS_LIST_END_CHAIN_CLUSTERS_LIST            0x0FF9
#define SFS12_CLUSTERS_LIST_END_CHAIN_COPY_CLUSTERS_LIST      0x0FFA
#define SFS12_CLUSTERS_LIST_END_CHAIN_ROOT_DIRECTORY         0x0FFB
#define SFS12_CLUSTERS_LIST_END_CHAIN_ROOT_DIRECTORY_ITEMS      0x0FFC
#define SFS12_CLUSTERS_LIST_END_CHAIN_DIRECTORY               0x0FFD
#define SFS12_CLUSTERS_LIST_END_CHAIN_DIRECTORY_ITEMS         0x0FFE
#define SFS12_CLUSTERS_LIST_END_CHAIN_FILE                  0x0FFF

#define SFS12_OBJECT_DESCRIPTION_STATUS_FREE               0
#define SFS12_OBJECT_DESCRIPTION_STATUS_OBJECT               1
#define SFS12_OBJECT_DESCRIPTION_INDEX_PARENT_ROOT_DIRECTORY   0

#pragma pack(1)
struct SFS12_BootSector
{
   char jmpCode[3];
   char identifier[8];
   char description[12];
   unsigned char cylinders;
   unsigned char tracksInCylinder;
   unsigned char sectorsInTrack;
   unsigned short int bytesInSector;
   unsigned char sectorsInCluster;
   unsigned short int indexReserved;
   unsigned short int indexClusters;
   unsigned short int indexCopyClusters;
   unsigned short int indexRootDirectory;
   unsigned char unfinishedAction;
   char code[472];
   char signature[2];
};
#pragma pack()

#pragma pack(1)
struct SFS12_ObjectDescription
{
   unsigned char status;
   unsigned short int indexParent;
   char name[24];
   char expansion[4];
   unsigned char attributes;
   unsigned int size;
   char createDate[4];
   char createTime[4];
   char readDate[4];
   char readTime[4];
   char writeDate[4];
   char writeTime[4];
   unsigned short int indexData;
   unsigned short int items;
};
#pragma pack()

union SFS12_Union_UShortToChars
{
   unsigned short int value;
   char bytes[2];
};

unsigned int SFS12_GetTextLength(const char* _src);
unsigned int SFS12_GetTextLength(const char* _src,const unsigned int _maxLength);

bool SFS12_SetText(char* _dsc,const unsigned int _dscLength,const char* _src);
bool SFS12_SetText(char* _dsc,const unsigned int _dscLength,const char* _src,const unsigned int _srcLength);

bool SFS12_SetDate(char* _dsc,const unsigned char _day,const unsigned char _month,const unsigned short int _year);
bool SFS12_SetTime(char* _dsc,const unsigned char _hour,const unsigned char _minute,const unsigned char _second);

bool SFS12_ClearCluster(char* _data,const unsigned short int _sectorsInCluster,const unsigned short int _indexCluster);
bool SFS12_ClearClusters(char* _data,const unsigned short int _sectorsInCluster,const unsigned short int _indexCluster,const unsigned short int _clustersCount);

bool SFS12_SetCluster(char* _data,const unsigned short int _sectorsInCluster,const unsigned short int _indexCluster,const char* _cluster);
bool SFS12_SetClusters(char* _data,const unsigned short int _sectorsInCluster,const unsigned short int _indexCluster,const unsigned short int _clustersCount,const char* _clusters);

bool SFS12_SetNotFullCluster(char* _data,const unsigned short int _sectorsInCluster,const unsigned short int _indexCluster,const char* _clusterPart,const unsigned short int _clusterPartSize);
bool SFS12_SetNotFullClusters(char* _data,const unsigned short int _sectorsInCluster,const unsigned short int _indexCluster,const unsigned short int _clustersCount,const char* _clusters,const unsigned short int _clusterPartSize);

bool SFS12_GetCluster(char* _cluster,const unsigned short int _sectorsInCluster,const char* _data,const unsigned short int _indexCluster);
bool SFS12_GetClusters(char* _clusters,const unsigned short int _clustersCount,const unsigned short int _sectorsInCluster,const char* _data,const unsigned short int _indexCluster);

jmpCode            db 0x00,0x00,0x00
identifier         db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
description         db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
cylinders         db 0x00
tracksInCylinder   db 0x00
sectorsInTrack      db 0x00
bytesInSector      dw 0x0000
sectorsInCluster   db 0x00
indexReserved      dw 0x0000
indexClusters      dw 0x0000
indexCopyClusters   dw 0x0000
indexRootDirectory   dw 0x0000
unfinishedAction   db 0x00
code            db ; Тут код загрузочного сектора на 472 байта
signature         db 0x00,0x00

status            db 0x00
indexParent         dw 0x0000
name            db ; Тут имя объекта на 24 байта
expansion         db 0x00,0x00,0x00,0x00
attributes         db 0x00
size            dd 0x00000000
createDate         db 0x00,0x00,0x00,0x00
createTime         db 0x00,0x00,0x00,0x00
readDate         db 0x00,0x00,0x00,0x00
readTime         db 0x00,0x00,0x00,0x00
writeDate         db 0x00,0x00,0x00,0x00
writeTime         db 0x00,0x00,0x00,0x00
indexData         dw 0x0000
items            dw 0x0000