elrond-codec 0.8.5

Lightweight binary serializer/deserializer, written especially for Elrond smart contracts
Documentation 
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

use elrond_codec::{
    test_util::check_top_encode_decode, top_decode_from_nested, top_decode_from_nested_or_exit,
    DecodeError, EncodeError, NestedDecode, NestedDecodeInput, NestedEncode, NestedEncodeOutput,
    TopDecode, TopDecodeInput, TopEncode, TopEncodeOutput,
};

#[derive(PartialEq, Debug, Clone, Copy)]
pub struct WrappedArray(pub [u8; 5]);

impl NestedEncode for WrappedArray {
    fn dep_encode<O: NestedEncodeOutput>(&self, dest: &mut O) -> Result<(), EncodeError> {
        dest.write(&self.0[..]);
        Ok(())
    }

    fn dep_encode_or_exit<O: NestedEncodeOutput, ExitCtx: Clone>(
        &self,
        dest: &mut O,
        _: ExitCtx,
        _: fn(ExitCtx, EncodeError) -> !,
    ) {
        dest.write(&self.0[..]);
    }
}

impl TopEncode for WrappedArray {
    fn top_encode<O: TopEncodeOutput>(&self, output: O) -> Result<(), EncodeError> {
        output.set_slice_u8(&self.0[..]);
        Ok(())
    }

    fn top_encode_or_exit<O: TopEncodeOutput, ExitCtx: Clone>(
        &self,
        output: O,
        _: ExitCtx,
        _: fn(ExitCtx, EncodeError) -> !,
    ) {
        output.set_slice_u8(&self.0[..]);
    }
}

impl NestedDecode for WrappedArray {
    fn dep_decode<I: NestedDecodeInput>(input: &mut I) -> Result<Self, DecodeError> {
        let mut arr = [0u8; 5];
        input.read_into(&mut arr)?;
        Ok(WrappedArray(arr))
    }

    fn dep_decode_or_exit<I: NestedDecodeInput, ExitCtx: Clone>(
        input: &mut I,
        c: ExitCtx,
        exit: fn(ExitCtx, DecodeError) -> !,
    ) -> Self {
        let mut arr = [0u8; 5];
        input.read_into_or_exit(&mut arr, c, exit);
        WrappedArray(arr)
    }
}

impl TopDecode for WrappedArray {
    fn top_decode<I: TopDecodeInput>(input: I) -> Result<Self, DecodeError> {
        top_decode_from_nested(input)
    }

    fn top_decode_or_exit<I: TopDecodeInput, ExitCtx: Clone>(
        input: I,
        c: ExitCtx,
        exit: fn(ExitCtx, DecodeError) -> !,
    ) -> Self {
        top_decode_from_nested_or_exit(input, c, exit)
    }
}

#[test]
fn test_top() {
    let wa = WrappedArray([1, 2, 3, 4, 5]);
    check_top_encode_decode(wa, &[1, 2, 3, 4, 5]);

    let mut v: Vec<WrappedArray> = Vec::new();
    v.push(wa);
    v.push(WrappedArray([6, 7, 8, 9, 0]));
    check_top_encode_decode(v, &[1, 2, 3, 4, 5, 6, 7, 8, 9, 0]);
}