Module header 

The fixed .voldoc header.

A descriptor begins with exactly HEADER_LEN bytes. The header is self-checked with CRC32C so that framing corruption is detected before any record parsing. Unknown mandatory feature bits fail closed; unknown optional bits are recorded and ignored.

Structs

Header

The parsed, validated fixed header.

Constants

FEATURE_DEFLATE_REPLAY

Mandatory feature bit: the descriptor carries at least one DEFLATE_REPLAY op and so requires a decoder built with exact-DEFLATE-replay support.

FEATURE_EXTERNAL_OBJECTS

Mandatory feature bit: the descriptor carries at least one EXTERNAL_REF object and so requires a decoder built with a content-addressed object store.

FEATURE_OBSERVATION_INDEX

Optional feature bit: the descriptor carries an OBSERVATION_INDEX record and so advertises a partial-decode lane.

FEATURE_SEEK_DIRECTORY

Optional feature bit: the descriptor carries a seek DIRECTORY record and so advertises a seek-based partial-I/O lane.

FORMAT_MAJOR

Major format version implemented by this build (provisional pre-1.0).

FORMAT_MINOR

Minor format version implemented by this build.

HEADER_LEN

Size of the fixed header in bytes.

MAGIC

Container magic: VOLDOC followed by a 0x1A text-EOF marker and NUL.

SUPPORTED_MANDATORY_FEATURES

Feature bits this build understands and supports (no replay support).