src/string_helper.rs


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

#[cfg(not(feature = "std"))]
use arraystring::{
    ArrayString,
    typenum::{U32, U160},
};

#[cfg(feature = "std")]
pub(crate) type NameString = String;

#[cfg(feature = "std")]
pub(crate) fn name_string_from_slice(s: &[u8]) -> NameString {
    match String::from_utf8(s.to_vec()) {
        Ok(s) => s,
        Err(_) => "Unable to create string".to_string(),
    }
}

#[cfg(not(feature = "std"))]
pub(crate) type NameString = ArrayString<U32>;

#[cfg(not(feature = "std"))]
pub(crate) fn name_string_from_slice(s: &[u8]) -> NameString {
    NameString::from_str_truncate(s)
}

#[cfg(feature = "std")]
pub(crate) type MessageString = String;

#[cfg(not(feature = "std"))]
pub(crate) type MessageString = ArrayString<U160>;

#[cfg(feature = "std")]
pub(crate) fn message_string_from_slice(s: &[u8]) -> MessageString {
    let mut split = s.split(|c| *c == 0);

    if let Some(s) = split.next() {
        match String::from_utf8(s.to_vec()) {
            Ok(s) => s.trim().to_string(),
            Err(_) => "Unable to create string".to_string(),
        }
    } else {
        "".to_string()
    }
}

#[cfg(not(feature = "std"))]
pub(crate) fn message_string_from_slice(s: &[u8]) -> MessageString {
    MessageString::from_str_truncate(s)
}

#[cfg(feature = "std")]
pub(crate) type PasswordString = String;

// I believe that a password can only be 141 characters,
// but given it's close enough to 160, let's just round
// up so it's the same as MessageString.
#[cfg(not(feature = "std"))]
pub(crate) type PasswordString = ArrayString<U160>;

#[cfg(feature = "std")]
pub(crate) fn password_string_from_slice(s: &[u8]) -> PasswordString {
    match String::from_utf8(s.to_vec()) {
        Ok(s) => s,
        Err(_) => "".to_string(),
    }
}

#[cfg(not(feature = "std"))]
pub(crate) fn password_string_from_slice(s: &[u8]) -> PasswordString {
    PasswordString::from_str_truncate(s)
}