1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
use crate::cid::Cid;
use crate::codec::{Codec, Decode, Encode, References};
use crate::error::{Result, TypeError, TypeErrorType, UnsupportedCodec};
use crate::ipld::Ipld;
use core::convert::TryFrom;
use std::io::{Read, Seek, Write};
use std::iter::Extend;
#[derive(Clone, Copy, Debug)]
pub struct RawCodec;
impl Codec for RawCodec {}
impl From<RawCodec> for u64 {
fn from(_: RawCodec) -> Self {
0x55
}
}
impl TryFrom<u64> for RawCodec {
type Error = UnsupportedCodec;
fn try_from(_: u64) -> core::result::Result<Self, Self::Error> {
Ok(Self)
}
}
impl Encode<RawCodec> for [u8] {
fn encode<W: Write>(&self, _: RawCodec, w: &mut W) -> Result<()> {
Ok(w.write_all(self)?)
}
}
impl Encode<RawCodec> for Box<[u8]> {
fn encode<W: Write>(&self, _: RawCodec, w: &mut W) -> Result<()> {
Ok(w.write_all(&self[..])?)
}
}
impl Encode<RawCodec> for Vec<u8> {
fn encode<W: Write>(&self, _: RawCodec, w: &mut W) -> Result<()> {
Ok(w.write_all(&self[..])?)
}
}
impl Encode<RawCodec> for Ipld {
fn encode<W: Write>(&self, c: RawCodec, w: &mut W) -> Result<()> {
if let Ipld::Bytes(bytes) = self {
bytes.encode(c, w)
} else {
Err(TypeError::new(TypeErrorType::Bytes, self).into())
}
}
}
impl Decode<RawCodec> for Box<[u8]> {
fn decode<R: Read + Seek>(c: RawCodec, r: &mut R) -> Result<Self> {
let buf: Vec<u8> = Decode::decode(c, r)?;
Ok(buf.into_boxed_slice())
}
}
impl Decode<RawCodec> for Vec<u8> {
fn decode<R: Read + Seek>(_: RawCodec, r: &mut R) -> Result<Self> {
let mut buf = vec![];
r.read_to_end(&mut buf)?;
Ok(buf)
}
}
impl Decode<RawCodec> for Ipld {
fn decode<R: Read + Seek>(c: RawCodec, r: &mut R) -> Result<Self> {
let bytes: Vec<u8> = Decode::decode(c, r)?;
Ok(Ipld::Bytes(bytes))
}
}
impl<T> References<RawCodec> for T {
fn references<R: Read, E: Extend<Cid>>(_c: RawCodec, _r: &mut R, _set: &mut E) -> Result<()> {
Ok(())
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_raw_codec() {
let data: &[u8] = &[0, 1, 2, 3];
let bytes = RawCodec.encode(data).unwrap();
assert_eq!(data, &*bytes);
let data2: Vec<u8> = RawCodec.decode(&bytes).unwrap();
assert_eq!(data, &*data2);
let ipld = Ipld::Bytes(data2);
let bytes = RawCodec.encode(&ipld).unwrap();
assert_eq!(data, &*bytes);
let ipld2: Ipld = RawCodec.decode(&bytes).unwrap();
assert_eq!(ipld, ipld2);
}
}