file_sys_api.h

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#ifndef FILE_SYS_API_H
#define FILE_SYS_API_H

#define EOF      0xff

#define READ_ONLY            0x00
#define WRITE_ONLY           0x01
#define READ_WRITE           0x02

#define SEEK_FILE_CUR        0x00
#define SEEK_FILE_END        0x01
#define SEEK_FILE_SET        0x02

#define NO_FILE_HANDLE       -100
#define NO_FILE_FCB          -101
#define NO_CLEAN_SECTOR      -102

#define FILE_NOT_EXIST       -103
#define FILE_IS_USED         -104
#define INVALID_HANDLE       -105
#define FILE_NOT_OPEN        -106
#define OPEN_MODE_ERROR      -107
#define FILE_CANNOT_READ     -108
#define FILE_CANNOT_WRITE    -109
#define NO_ENOUGH_MEMORY     -110

#define POINTER_OVERFLOW     -111
#define POINTER_UNDERFLOW    -112

#define INVALID_ORIGIN       -113
#define FAT_ERROR            -114
#define SYSTEM_ERROR         -115
#define FILE_IS_EXIST        -116

int file_create(const char *filename);
int file_delete(const char *filename);

int file_open(const char *filename,unsigned char open_mode);
void file_close(int handle_id);
void file_close_all();

int file_read(int file_handle,unsigned char *buffer,int count);
int file_write(int file_handle,unsigned char *buffer,int count,int *real_write_size);

int file_seek(int file_handle,int offset,int origin);
int file_length(int file_handle);

void file_system_format();
void file_system_init();

#endif