src/string_helper.rs


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

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

#[cfg(feature = "std")]
pub 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 type NameString = ArrayString<U32>;

#[cfg(not(feature = "std"))]
pub fn name_string_from_slice(s: &[u8]) -> NameString {
    NameString::from_str_truncate(core::str::from_utf8(s).unwrap())
}

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

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

#[cfg(feature = "std")]
pub 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 fn message_string_from_slice(s: &[u8]) -> MessageString {
    MessageString::from_str_truncate(core::str::from_utf8(s).unwrap())
}

#[cfg(feature = "std")]
pub 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 type PasswordString = ArrayString<U160>;

#[cfg(feature = "std")]
pub 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 fn password_string_from_slice(s: &[u8]) -> PasswordString {
    PasswordString::from_str_truncate(core::str::from_utf8(s).unwrap())
}