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FileMetadata

Struct FileMetadata 

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#[repr(C, packed(1))]
pub struct FileMetadata { pub filename: [u8; 128], pub label_data: [u8; 64], pub size: u64, pub extent_count: u32, pub overflow_sector: u64, pub extents: [Extent; 18], }
Expand description

ディスク上のファイルメタデータ (サイズ 168 バイト)

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§filename: [u8; 128]

ファイル名/パス (UTF-8, NUL終端)。 【2026-07-26】エクステント領域を確保するため 256→128 バイトへ縮小した。 本 FS のパスは /cache/browser/<host>/<hash> 形式などで 128 バイトあれば足りる。

§label_data: [u8; 64]§size: u64

ファイルサイズ(バイト)。u32 では 4GB で頭打ちになるため u64 とした。

§extent_count: u32

有効なエクステントの総数(インライン+溢れ分の合計)。

§overflow_sector: u64

溢れたエクステントを格納するセクタのチェーン先頭(0 なら無し)。 断片化が激しくインライン 18 本に収まらない場合のみ使う。

§extents: [Extent; 18]

インラインのエクステント配列。

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impl FileMetadata

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pub fn new(name: &str, labels: &str, size: u64) -> Self

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pub fn get_filename(&self) -> &str

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pub fn get_labels(&self) -> &str

Trait Implementations§

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impl Clone for FileMetadata

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fn clone(&self) -> FileMetadata

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Copy for FileMetadata

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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type Output = T

Should always be Self
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where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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type Error = <U as TryFrom<T>>::Error

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.