use hex_conservative::display::DisplayArray;
use hex_conservative::{DisplayHex, FromHex, HexToArrayError, HexToBytesError};
fn main() {
let hex = "00000000cafebabedeadbeefcafebabedeadbeefcafebabedeadbeefcafebabe";
println!("\nParse from hex: {}\n", hex);
let array = <[u8; 32] as FromHex>::from_hex(hex).expect("failed to parse array");
let wrap = Wrap::from_hex(hex).expect("failed to parse wrapped array");
println!("Print an array using traits from the standard libraries `fmt` module along with the provided implementation of `DisplayHex`:\n");
println!("LowerHex: {:x}", array.as_hex());
println!("UpperHex: {:X}", array.as_hex());
println!("Display: {}", array.as_hex());
println!("Debug: {:?}", array.as_hex());
println!("Debug pretty: {:#?}", array.as_hex());
println!("\n");
println!(
"Print the wrapped array directly using traits from the standard libraries `fmt` module:\n"
);
println!("LowerHex: {:x}", wrap.as_hex());
println!("UpperHex: {:X}", wrap.as_hex());
println!("Display: {}", wrap.as_hex());
println!("Debug: {:?}", wrap.as_hex());
println!("Debug pretty: {:#?}", wrap.as_hex());
#[cfg(feature = "alloc")]
{
let array_hex = array.to_lower_hex_string();
let wrap_hex = wrap.to_lower_hex_string();
assert_eq!(array_hex, wrap_hex);
}
}
pub struct Wrap([u8; 32]);
impl FromHex for Wrap {
type Err = HexToArrayError;
fn from_byte_iter<I>(iter: I) -> Result<Self, Self::Err>
where
I: Iterator<Item = Result<u8, HexToBytesError>> + ExactSizeIterator + DoubleEndedIterator,
{
Ok(Self(FromHex::from_byte_iter(iter)?))
}
}
impl<'a> DisplayHex for &'a Wrap {
type Display = DisplayArray<core::slice::Iter<'a, u8>, [u8; 64]>;
fn as_hex(self) -> Self::Display { DisplayArray::new(self.0.iter()) }
fn hex_reserve_suggestion(self) -> usize { 64 }
}