rs_pgcopy2cbor/
hdr.rs

1use std::io;
2use std::io::Read;
3
4pub struct Sig {
5    pub raw: [u8; 11],
6}
7
8impl Sig {
9    pub fn from_rdr_no_validation<R>(rdr: &mut R) -> Result<Self, io::Error>
10    where
11        R: Read,
12    {
13        let mut s = Self { raw: [0; 11] };
14        rdr.read_exact(&mut s.raw)?;
15        Ok(s)
16    }
17}
18
19/// Flags field.
20pub struct Flags {
21    pub raw: u32,
22}
23
24impl Flags {
25    pub fn from_rdr_no_validation<R>(rdr: &mut R) -> Result<Self, io::Error>
26    where
27        R: Read,
28    {
29        let mut buf: [u8; 4] = [0; 4];
30        rdr.read_exact(&mut buf)?;
31        Ok(Self {
32            raw: u32::from_be_bytes(buf),
33        })
34    }
35}
36
37/// Header extension area length.
38pub struct Ext {
39    pub raw: u32,
40}
41
42impl Ext {
43    pub fn from_rdr_no_validation<R>(rdr: &mut R) -> Result<Self, io::Error>
44    where
45        R: Read,
46    {
47        let mut buf: [u8; 4] = [0; 4];
48        rdr.read_exact(&mut buf)?;
49        Ok(Self {
50            raw: u32::from_be_bytes(buf),
51        })
52    }
53}
54
55pub struct Header {
56    pub sig: Sig,
57    pub flags: Flags,
58    pub ext: Ext,
59}
60
61impl Header {
62    pub fn from_rdr_no_validation<R>(rdr: &mut R) -> Result<Self, io::Error>
63    where
64        R: Read,
65    {
66        let sig: Sig = Sig::from_rdr_no_validation(rdr)?;
67        let flags: Flags = Flags::from_rdr_no_validation(rdr)?;
68        let ext: Ext = Ext::from_rdr_no_validation(rdr)?;
69        Ok(Self { sig, flags, ext })
70    }
71}
rs_pgcopy2cbor/hdr.rs

rs_pgcopy2cbor/
hdr.rs
