Struct Superblock 

pub struct Superblock {

    pub modification_time: Timedate,
    pub uncompressed_size: u32,
    pub number_of_summary_buckets: u32,
    pub number_of_non_summary_buckets: u32,
    pub number_of_bitmaps: u32,
    pub rrv_bucket_size: u32,
    pub data_rrv_bucket_position: u32,
    pub rrv_identifier_low: u32,
    pub rrv_identifier_high: u32,
    pub bitmap_size: u32,
    pub data_note_identifier_table_size: u32,
    pub modified_note_log_size: u32,
    pub folder_directory_object_size: u32,
    pub flags: u16,
    pub write_count: u32,
    pub size: u32,
    pub compression_type: u16,
    pub number_of_summary_bucket_descriptor_pages: u32,
    pub number_of_non_summary_bucket_descriptor_pages: u32,
    pub number_of_soft_deleted_note_entries: u32,
    pub shared_template_information_size: u16,
    pub number_of_form_names: u16,
    pub form_bitmap_size: u32,
}

Parsed superblock header. Field naming mirrors the libnsfdb struct.

Fields

modification_time: Timedate

Most recent modification time. Used to select the freshest of the four superblock copies via select_freshest.

uncompressed_size: u32

Uncompressed size of the superblock body (when compressed).

number_of_summary_buckets: u32

Total summary buckets allocated in the database.

number_of_non_summary_buckets: u32

Total non-summary buckets allocated in the database.

number_of_bitmaps: u32

Total bitmaps allocated in the database.

rrv_bucket_size: u32

Size in bytes of each RRV bucket. Should match DBINFO’s rrv_bucket_size; cross-validate at the database layer.

data_rrv_bucket_position: u32

Data RRV bucket position in 256-byte units. Multiply by 256 for the byte offset. Should match DBINFO’s data_rrv_bucket_position for non-fresh templates.

rrv_identifier_low: u32

Lower 32 bits of the next-available RRV identifier counter.

rrv_identifier_high: u32

Upper 32 bits of the next-available RRV identifier counter.

bitmap_size: u32

Allocation-bitmap size in bytes.

data_note_identifier_table_size: u32

Data Note Identifier Table size in bytes.

modified_note_log_size: u32

Modified-note-log size in bytes.

folder_directory_object_size: u32

Folder Directory Object (FDO) size in bytes.

flags: u16

Flags word.

write_count: u32

Write-count counter. Increments on each superblock commit.

size: u32

Total size in bytes of this superblock (header + body + footer).

compression_type: u16

Compression type of the superblock body. Typically zero (uncompressed) on modern Domino.

number_of_summary_bucket_descriptor_pages: u32

Number of summary-bucket-descriptor pages reachable via this superblock. Used by Slice 2.6 Phase B for BDT walking.

number_of_non_summary_bucket_descriptor_pages: u32

Number of non-summary-bucket-descriptor pages reachable via this superblock.

number_of_soft_deleted_note_entries: u32

Number of soft-deleted note entries (notes moved to $Trash with retention period still active).

shared_template_information_size: u16

Shared-template-information block size in bytes.

number_of_form_names: u16

Number of form names cached at the superblock level.

form_bitmap_size: u32

Form-bitmap size in bytes.

Implementations

impl Superblock

pub fn parse(bytes: &[u8]) -> Result<Self, NsfError>

Parse a superblock header from the first SUPERBLOCK_HEADER_BYTES of a buffer positioned at the superblock’s file offset.

pub fn modification_sort_key(&self) -> (u32, u32)

Comparable absolute UTC timestamp from this superblock’s modification_time. Returned as (julian_day, centiseconds) which compares lexicographically and treats different timezones uniformly (Innards[0] is always centiseconds since midnight UTC per the format spec).

Trait Implementations

impl Clone for Superblock

fn clone(&self) -> Superblock

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Superblock

impl Debug for Superblock

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

Formats the value using the given formatter.

impl Eq for Superblock

impl PartialEq for Superblock

fn eq(&self, other: &Superblock) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Superblock