#ifndef _DISK_H
#define _DISK_H
#include
/** Size of a disk block in bytes */
#define BLOCK_SIZE 4096
/**
* block_disk_open – Open virtual disk file
* @diskname: Name of the virtual disk file
*
* Open virtual disk file @diskname. A virtual disk file must be opened before
* blocks can be read from it with block_read() or written to it with
* block_write().
*
* Return: -1 if @diskname is invalid, if the virtual disk file cannot be opened
* or is already open. 0 otherwise.
*/
int block_disk_open(const char *diskname);
/**
* block_disk_close – Close virtual disk file
*
* Return: -1 if there was no virtual disk file opened. 0 otherwise.
*/
int block_disk_close(void);
/**
* block_disk_count – Get disk’s block count
*
* Return: -1 if there was no virtual disk file opened, otherwise the number of
* blocks that the currently open disk contains.
*/
int block_disk_count(void);
/**
* block_write – Write a block to disk
* @block: Index of the block to write to
* @buf: Data buffer to write in the block
*
* Write the content of buffer @buf (%BLOCK_SIZE bytes) in the virtual disk’s
* block @block.
*
* Return: -1 if @block is out of bounds or inaccessible or if the writing
* operation fails. 0 otherwise.
*/
int block_write(size_t block, const void *buf);
/**
* block_read – Read a block from disk
* @block: Index of the block to read from
* @buf: Data buffer to be filled with content of block
*
* Read the content of virtual disk’s block @block (%BLOCK_SIZE bytes) into
* buffer @buf.
*
* Return: -1 if @block is out of bounds or inaccessible, or if the reading
* operation fails. 0 otherwise.
*/
int block_read(size_t block, void *buf);
#endif /* _DISK_H */