pub fn encode_frame_header(header: &FrameHeader, buf: &mut [u8])Expand description
Encode header into the first FRAME_HEADER_SIZE bytes of
buf AND compute the per-frame CRC32C covering the frame header
(with the CRC field zeroed) plus the page body that follows.
buf.len() must equal FRAME_SIZE; the page body must already
have been written into buf[FRAME_HEADER_SIZE..].
Phase 4 (issue #9): on encrypted WALs the CRC is computed
over (header_sans_crc + PLAINTEXT body); the caller MUST pass
a buffer whose [FRAME_HEADER_SIZE..FRAME_SIZE] slice carries
the plaintext body before invoking this helper. Encryption of
the body happens AFTER encode_frame_header returns (see
Wal::write_frame).