qr-base45

Base45 encode/decode for arbitrary bytes per RFC 9285 (QR alphanumeric alphabet).

• 2 bytes -> 3 chars; 1 byte -> 2 chars
• Alphabet: 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:
• Public API: byte-oriented, no string reinterpretation

Usage

cargo add qr-base45

use qr_base45::{encode, decode};

let data: &[u8] = &[0x01, 0x02, 0xFF];
let s = encode(data);
let back = decode(&s).unwrap();
assert_eq!(back, data);

Notes

• This crate intentionally encodes/decodes arbitrary bytes, not UTF-8 text. If you have a text string, pass its bytes explicitly.
• Errors include invalid characters, dangling final character, and value overflow per RFC rules.

License

Apache-2.0