Trait HexToSigned

Source

pub trait HexToSigned: Sized {
    // Required method
    fn htoi(hex: &[u8]) -> Option<Self>;
}

Expand description

§Hex (ASCII Bytes) to Unsigned.

This trait exposes the method htou to decode an ASCII byte slice of hex values into a proper unsigned integer.

This method returns None if the slice is empty or the resulting value is too big for the type.

(Excessive leading zeroes are fine and will simply be stripped.)

For signed integers, see HexToSigned.

§Examples

use dactyl::traits::HexToSigned;

assert_eq!(i8::htoi(b"fB"),  Some(-5));
assert_eq!(i8::htoi(b"0FB"), Some(-5));

// These are no good.
assert!(i8::htoi(&[]).is_none());      // Empty.
assert!(i8::htoi(b"-fb").is_none());   // "-"
assert!(i8::htoi(b" FB  ").is_none()); // Whitespace.
assert!(i8::htoi(b"FFB").is_none());   // Too big.