ps_ecc/long/header/methods/
to_bytes.rs

1use crate::long::LongEccHeader;
2
3impl LongEccHeader {
4    /// Serializes the header into its 32-byte wire format.
5    #[must_use]
6    pub fn to_bytes(self) -> [u8; 32] {
7        let mut bytes = [0; 32];
8
9        bytes[0..2].copy_from_slice(&self.magic.to_be_bytes());
10        bytes[2] = self.version;
11        bytes[3] = self.parity;
12        bytes[4..8].copy_from_slice(&self.full_length.to_be_bytes());
13        bytes[8..12].copy_from_slice(&self.message_length.to_be_bytes());
14        bytes[12..16].copy_from_slice(&self.header_checksum.to_be_bytes());
15        bytes[16..24].copy_from_slice(&self.checksum.to_be_bytes());
16        bytes[24..32].copy_from_slice(&self.header_parity);
17
18        bytes
19    }
20}
21
22#[cfg(test)]
23mod tests {
24    use crate::long::{LongEccHeader, OverlapFactor, LONG_ECC_HEADER_MAGIC};
25
26    type TestError = Box<dyn std::error::Error>;
27
28    #[test]
29    fn test_to_bytes_layout() -> Result<(), TestError> {
30        let checksum = 0x0123_4567_89AB_CDEF;
31        let header = LongEccHeader::new(3, OverlapFactor::Double, 138, 100, checksum)?;
32
33        let bytes = header.to_bytes();
34
35        assert_eq!(bytes[0..2], LONG_ECC_HEADER_MAGIC.to_be_bytes());
36        assert_eq!(bytes[2], 1);
37        assert_eq!(bytes[3], 3 | OverlapFactor::Double.to_u8());
38        assert_eq!(bytes[4..8], 138u32.to_be_bytes());
39        assert_eq!(bytes[8..12], 100u32.to_be_bytes());
40        assert_eq!(bytes[12..16], header.header_checksum().to_be_bytes());
41        assert_eq!(bytes[16..24], checksum.to_be_bytes());
42        assert_eq!(bytes[24..32], header.header_parity());
43
44        Ok(())
45    }
46
47    #[test]
48    fn test_to_bytes_from_bytes_roundtrip() -> Result<(), TestError> {
49        let header = LongEccHeader::new(5, OverlapFactor::Quadruple, 482, 400, 42)?;
50
51        let reparsed = LongEccHeader::from_bytes(header.to_bytes())?;
52
53        assert_eq!(reparsed, header);
54
55        Ok(())
56    }
57}
ps_ecc/long/header/methods/to_bytes.rs

ps_ecc/long/header/methods/
to_bytes.rs
