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

// Copyright 2021 MaidSafe.net limited.
//
// This SAFE Network Software is licensed to you under the MIT license <LICENSE-MIT
// https://opensource.org/licenses/MIT> or the Modified BSD license <LICENSE-BSD
// https://opensource.org/licenses/BSD-3-Clause>, at your option. This file may not be copied,
// modified, or distributed except according to those terms. Please review the Licences for the
// specific language governing permissions and limitations relating to use of the SAFE Network
// Software.

use super::errors::convert_bincode_error;
use super::{Error, Result};
use multibase::{self, Base};
use serde::{de::DeserializeOwned, Deserialize, Serialize};

/// Wrapper for raw bincode::serialise.
pub fn serialise<T: Serialize>(data: &T) -> Result<Vec<u8>> {
    bincode::serialize(data).map_err(convert_bincode_error)
}

/// Wrapper for bincode::deserialize.
pub(crate) fn deserialise<'a, T>(bytes: &'a [u8]) -> Result<T>
where
    T: Deserialize<'a>,
{
    bincode::deserialize(bytes).map_err(convert_bincode_error)
}

/// Wrapper for z-Base-32 multibase::encode.
pub(crate) fn encode<T: Serialize>(data: &T) -> Result<String> {
    let bytes = serialise(&data)?;
    Ok(multibase::encode(Base::Base32Z, &bytes))
}

/// Wrapper for z-Base-32 multibase::decode.
pub(crate) fn decode<I: AsRef<str>, O: DeserializeOwned>(encoded: I) -> Result<O> {
    let (base, decoded) =
        multibase::decode(encoded).map_err(|e| Error::FailedToParse(e.to_string()))?;
    if base != Base::Base32Z {
        return Err(Error::FailedToParse(format!(
            "Expected z-base-32 encoding, but got {:?}",
            base
        )));
    }
    deserialise(&decoded).map_err(|e| Error::FailedToParse(e.to_string()))
}

/// Easily create a `BTreeSet`.
#[macro_export]
macro_rules! btree_set {
    ($($item:expr),*) => {{
        let mut _set = ::std::collections::BTreeSet::new();
        $(
            let _ = _set.insert($item);
        )*
        _set
    }};

    ($($item:expr),*,) => {
        btree_set![$($item),*]
    };
}

/// Easily create a `BTreeMap` with the key => value syntax.
#[macro_export]
macro_rules! btree_map {
    () => ({
        ::std::collections::BTreeMap::new()
    });

    ($($key:expr => $value:expr),*) => {{
        let mut _map = ::std::collections::BTreeMap::new();
        $(
            let _ = _map.insert($key, $value);
        )*
        _map
    }};

    ($($key:expr => $value:expr),*,) => {
        btree_map![$($key => $value),*]
    };
}