pub fn read_schema_epoch(data: &[u8]) -> Option<u32>Expand description
Read the schema_epoch field from an already-written header.
Returns None if data is too short. Returns the stored value
verbatim, callers that want the “0 means legacy” compatibility
rule should apply it themselves:
ⓘ
let stored = read_schema_epoch(data)?;
let effective = if stored == 0 { DEFAULT_SCHEMA_EPOCH } else { stored };