Struct SourceVolumeSnapshot 

pub struct SourceVolumeSnapshot {

    pub label: String,
    pub signature: u16,
    pub attributes: u32,
    pub create_date: u32,
    pub modify_date: u32,
    pub backup_date: u32,
    pub checked_date: u32,
    pub finder_info: [u32; 8],
    pub block_size: u32,
    pub total_blocks: u32,
    pub file_count: u32,
    pub folder_count: u32,
    pub boot_blocks: [u8; 1024],
    pub catalog_total_blocks: u32,
    pub extents_total_blocks: u32,
    pub attributes_total_blocks: u32,
}

Volume-level metadata captured from the source.

Fields

label: String

Volume label (decoded UTF-8 of the root folder key name).

signature: u16

0x482B (HFS+) or 0x4858 (HFSX). Preserved so the target can be re-formatted with the same case-sensitivity behavior.

attributes: u32

VH attributes word — clone needs this for the journaled bit, the case-sensitivity bit (HFSX), and a few low-level flags.

create_date: u32

modify_date: u32

backup_date: u32

checked_date: u32

finder_info: [u32; 8]

8 × u32 Finder info. finder_info[0] is the blessed System Folder CNID; other slots are copied verbatim with any CNID remap applied by the caller in Step 21.

block_size: u32

Source allocation block size (informational — clone may pick a different block size on the target).

total_blocks: u32

Source total allocation blocks (informational).

file_count: u32

folder_count: u32

boot_blocks: [u8; 1024]

First 1024 bytes of the partition. Always zero on macOS-formatted volumes; copied verbatim by clone for round-trip parity.

catalog_total_blocks: u32

Source vh.catalog_file.total_blocks. The streamed defrag planner uses this (with a safety margin) to size the target’s catalog B-tree so leaf splits don’t run out of free nodes mid-emit.

extents_total_blocks: u32

Source vh.extents_file.total_blocks. Inherited as a ceiling for the target’s extents-overflow file size; the streamed target packs files contiguously and typically needs less.

attributes_total_blocks: u32

Source vh.attributes_file.total_blocks. Zero on volumes without xattrs; non-zero values flow through to the target’s attributes B-tree allocation.

Implementations

impl SourceVolumeSnapshot

pub fn capture<R: Read + Seek>( fs: &mut HfsPlusFilesystem<R>, ) -> Result<Self, FilesystemError>

Capture volume-level metadata from an opened source filesystem. The source is read but never mutated.

Trait Implementations

impl Clone for SourceVolumeSnapshot

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SourceVolumeSnapshot

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.