Crate fast_hex_lite 

Fast, allocation-free hex encoding/decoding.

• no_std by default (scalar path)
• Optional std support
• Optional simd accelerated decode/validate on supported targets

API

• Decode: decode_to_slice, decode_to_array, decode_in_place
• Encode: encode_to_slice

Examples

Decode hex → bytes:

use fast_hex_lite::decode_to_slice;

let hex = b"deadbeef";
let mut buf = [0u8; 4];
let n = decode_to_slice(hex, &mut buf).unwrap();
assert_eq!(&buf[..n], &[0xde, 0xad, 0xbe, 0xef]);

Encode bytes → hex (lowercase):

use fast_hex_lite::encode_to_slice;

let src = [0xde, 0xad, 0xbe, 0xef];
let mut out = [0u8; 8];
let n = encode_to_slice(&src, &mut out, true).unwrap();
assert_eq!(&out[..n], b"deadbeef");

Enums

Error

Errors that can occur during hex encoding or decoding.

Functions

decode_in_place

Decode hex bytes in-place: buf initially contains ASCII hex; after decoding, the first buf.len() / 2 bytes hold the result.

decode_to_array

Decode exactly N bytes from a hex string of length 2*N.

decode_to_slice

Decode ASCII-hex bytes src_hex into dst.

decoded_len

Returns the number of bytes produced from a hex string of hex_len bytes.

encode_to_slice

Encode bytes into hex (lowercase or uppercase) into the provided output slice.

encoded_len

Returns the required output length (in bytes) for encoding n bytes to hex.