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ProvenanceMiniHeader

qualia_core_db::container_10d::provenance_section

Struct ProvenanceMiniHeader 

Source 
#[repr(C)]
pub struct ProvenanceMiniHeader {
Show 13 fields
    pub magic: u32,
    pub version: u16,
    pub flags: u16,
    pub source_digest: u32,
    pub reserved_u32: u32,
    pub timestamp_epoch_s: u64,
    pub version_hash: [u8; 32],
    pub source_len: u32,
    pub media_len: u32,
    pub licence_len: u32,
    pub vc_len: u32,
    pub metadata_len: u32,
    pub reserved_pad: u32,

}
Expand description

The 80-byte ProvenanceSidecar-section mini-header. repr(C), naturally aligned, no implicit padding.

offset  size  field
0       4     magic:u32          (PROVENANCE_MAGIC)
4       2     version:u16        (PROVENANCE_SECTION_VERSION)
6       2     flags:u16          (bit 0 = a VC is present)
8       4     source_digest:u32  (CRC-32C over source_bytes — the gate anchor)
12      4     reserved_u32       (must be zero) - moves before u64 to align to 16
16      8     timestamp_epoch_s:u64 (Date of harvest/authoring)
24      32    version_hash:[u8; 32] (Cryptographic version control hash e.g., SHA256)
56      4     source_len:u32
60      4     media_len:u32      (source media-type utf8 length)
64      4     licence_len:u32
68      4     vc_len:u32
72      4     metadata_len:u32   (Schema.org / Dublin Core semantic JSON-LD length)
76      4     reserved_pad:u32   (padding for 80-byte alignment)

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§magic: u32§version: u16§flags: u16§source_digest: u32§reserved_u32: u32§timestamp_epoch_s: u64§version_hash: [u8; 32]§source_len: u32§media_len: u32§licence_len: u32§vc_len: u32§metadata_len: u32§reserved_pad: u32

Trait Implementations§

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impl Clone for ProvenanceMiniHeader

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fn clone(&self) -> ProvenanceMiniHeader

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 Debug for ProvenanceMiniHeader

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

Formats the value using the given formatter. Read more
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impl PartialEq for ProvenanceMiniHeader

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

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

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

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fn zeroed() -> Self

Calls zeroed. Read more
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impl Copy for ProvenanceMiniHeader

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impl Eq for ProvenanceMiniHeader

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impl Pod for ProvenanceMiniHeader

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impl StructuralPartialEq for ProvenanceMiniHeader

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