fat12.h

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/*------------------------------------------------------------------------------
 *  Kintsugi OS FileSystems source code
 *  File: fs/fat12.h
 *  Title: Заголовочный файл fat12.h
 *  Last Change Date: 30 October 2023, 12:28 (UTC)
 *  Author: alexeev-prog
 *  License: GNU GPL v3
 * ------------------------------------------------------------------------------
 *  Description: Заголовочный файл файловой системы Fat12
 * ----------------------------------------------------------------------------*/
 
#ifndef FS_FAT12_H
#define FS_FAT12_H
 
#include "../kklibc/ctypes.h"
 
typedef struct {
    u8 jmp[3]; 
    char oem[8]; 
    u16 bytes_per_sector; 
    u8 sectors_per_cluster; 
    u16 reserved_sectors; 
    u8 fat_count; 
    u16 root_entries; 
    u16 total_sectors; 
    u8 media_type; 
    u16 sectors_per_fat; 
    u16 sectors_per_track; 
    u16 head_count; 
    u32 hidden_sectors; 
    u32 large_sector_count; 
    // расширенный BPB
    u8 drive_number; 
    u8 reserved; 
    u8 boot_signature; 
    u32 volume_id; 
    char volume_label[11]; 
    char fs_type[8]; 
} __attribute__((packed)) fat12_boot_sector_t;
 
typedef struct {
    char filename[8]; 
    char extension[3]; 
    u8 attributes; 
    u8 reserved[10]; 
    u16 time_created; 
    u16 date_created; 
    u16 first_cluster; 
    u32 file_size; 
} __attribute__((packed)) fat12_dir_entry_t;
 
typedef struct {
    u32 fat_start_sector; 
    u32 fat_size_sectors; 
    u32 root_dir_start_sector; 
    u32 root_dir_size_sectors; 
    u32 data_start_sector; 
    u32 total_clusters; 
    u8* fat_buffer; 
    u32 fat_buffer_loaded; 
} fat12_context_t;
 
void fat12_init(void);
 
int fat12_read_boot_sector(fat12_boot_sector_t* boot);
 
int fat12_find_file(const char* filename, fat12_dir_entry_t* result);
 
void fat12_list_root(void);
 
int fat12_read_file(const char* filename, u8* buffer);
 
void print_fat12_info(void);
 
void fat12_cleanup(void);
 
/* -------------------------------------------------------------------------- */
/* НОВЫЕ ФУНКЦИИ ДЛЯ ЗАПИСИ                                                   */
/* -------------------------------------------------------------------------- */
 
int fat12_create_file(const char* filename);
 
int fat12_delete_file(const char* filename);
 
int fat12_write_file(const char* filename, u8* data, u32 size);
 
#endif