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use crate::disk::inode::Inode;
use std::ffi::{OsStr, OsString};
use std::os::unix::ffi::OsStrExt;
pub trait Block: Default + Clone {}
#[repr(C)]
#[derive(Clone)]
pub struct DataBlock(pub(crate) [u8; 4096]);
impl Default for DataBlock {
fn default() -> Self {
Self([0; 4096])
}
}
impl Block for DataBlock {}
#[repr(C)]
#[derive(Clone)]
pub struct InodeBlock {
pub(crate) inodes: [Inode; 16],
}
impl Default for InodeBlock {
fn default() -> Self {
Self {
inodes: [
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
Inode::empty(),
],
}
}
}
impl Block for InodeBlock {}
const FULL_MAP: u32 = 0b111_111_111_111_111;
#[repr(C)]
#[derive(Clone)]
pub struct DirectoryEntry {
pub inode: u32,
pub record_len: u16,
pub name_len: u8,
pub file_type: u8,
pub name: [u8; 256],
}
impl DirectoryEntry {
pub(crate) fn name(&self) -> OsString {
let name = &self.name[0..self.name_len as usize];
OsStr::from_bytes(name).to_os_string()
}
}
impl Default for DirectoryEntry {
fn default() -> Self {
Self {
inode: 0,
record_len: 0,
name_len: 0,
file_type: 0x0,
name: [0; 256],
}
}
}
#[repr(C)]
#[derive(Clone)]
pub struct DirectoryBlock {
pub entries: [DirectoryEntry; 15],
reserved: [u8; 136],
}
impl Default for DirectoryBlock {
fn default() -> Self {
Self {
entries: [
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
DirectoryEntry::default(),
],
reserved: [0xFF; 136],
}
}
}
impl Block for DirectoryBlock {}
#[repr(C)]
#[derive(Clone)]
pub struct IndirectBlock {
pub entries: [u32; 1024],
}
impl Default for IndirectBlock {
fn default() -> Self {
Self { entries: [0; 1024] }
}
}
impl Block for IndirectBlock {}
#[repr(C)]
#[derive(Clone)]
pub struct DoubleIndirectBlock {
pub indirect: [u32; 1024],
}
impl Default for DoubleIndirectBlock {
fn default() -> Self {
Self {
indirect: [0; 1024],
}
}
}
impl Block for DoubleIndirectBlock {}
#[repr(C)]
#[derive(Clone)]
pub struct TripleIndirectBlock {
pub double_indirect: [u32; 1024],
}
impl Default for TripleIndirectBlock {
fn default() -> Self {
Self {
double_indirect: [0; 1024],
}
}
}
impl Block for TripleIndirectBlock {}
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