src/crypto/blake/blake3/hex.bend source

src/crypto/blake/blake3/hex.bend on the hub · documented module

import Basedef hex_digit_if(x: U32, small: Bool) -> Char:  match small:    case True{}:      Chr{(48 + x : U32)}    case False{}:      Chr{(87 + x : U32)}def hex_digit(+x: U32) -> Char:  hex_digit_if(x, U32.is_lt(x, 10))def hex_byte(+x: U32) -> String:  SCon{hex_digit(U32.shrn(x,4n)),SCon{hex_digit(U32.and(x,15)),SNil{}}}def hex_word(+x: U32) -> String:  hex_byte(U32.and(x,255)) ++ hex_byte(U32.and(U32.shrn(x,8n),255)) ++ hex_byte(U32.and(U32.shrn(x,16n),255)) ++ hex_byte(U32.shrn(x,24n))def hex_walk(n: Nat, +index: U32, pair: Array<U32> & U32) -> String:  match n pair:    case 0n Tuple{a,w}: hex_word(w)    case 1n+p Tuple{a,w}: hex_word(w) ++ hex_walk(p,U32.inc(index),Array.get(U32,a,index))# The digest words as lowercase hex, bytes in little-endian word order.def hex(a: Array<U32>) -> String:  hex_walk(7n,1,Array.get(U32,a,0))