1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171
use std::char; use std::cmp; use std::cmp::{min,max}; const UP:isize = -1; const DOWN:isize = 1; const LEFT:isize = -1; const RIGHT:isize = 1; const MOVEMENTS:[(isize, isize);4] = [ (UP, LEFT), (UP, RIGHT), (DOWN, LEFT), (DOWN, RIGHT), ]; pub struct Mode<'a> { pub height: usize, pub width: usize, pub alphabet: &'a [u8], } pub const OPENSSL: Mode<'static> = Mode { height: 9, width: 17, alphabet: b" .o+=*BOX@%&#/^SE", }; pub enum BoxMode { Ascii, Unicode, } impl BoxMode { fn chars(&self) -> Vec<char> { match *self { BoxMode::Ascii => "-|++++".chars().collect(), BoxMode::Unicode => "─│┌┐└┘".chars().collect(), } } } fn in_range<T: cmp::Ord>(minumum: T, value: T, maximum: T) -> T { min(max(minumum, value), maximum) } pub fn drunken_bishop<'a>(fingerprint: &'a [u8], mode: Mode, b: BoxMode) -> String { let mut field = vec![vec![0; mode.width]; mode.height]; let b = b.chars(); let mut pos = (mode.height/2, mode.width/2); for byte in fingerprint { for i in 0..4 { let code = (*byte as usize & (0b11 << (2*i))) >> (2*i); let (di,dj) = MOVEMENTS[code]; pos.0 = in_range(0, pos.0 as isize + di, mode.height as isize -1) as usize; pos.1 = in_range(0, pos.1 as isize + dj, mode.width as isize -1) as usize; field[pos.0][pos.1] += 1; } } field[mode.height/2][mode.width/2] = mode.alphabet.len()-2; field[pos.0][pos.1] = mode.alphabet.len()-1; let mut res = String::new(); for row in field { res.push(b[1]); for val in row { let c = char::from_u32(mode.alphabet[min(val, mode.alphabet.len()-1)] as u32); res.push(c.unwrap()); } res.push(b[1]); res.push('\n'); } format!("{2}{1}{3}\n{0}{4}{1}{5}\n", res, (0..mode.width).map(|_| b[0]).collect::<String>(), b[2], b[3], b[4], b[5]) } #[test] fn test1() { let input = [0x16, 0x27, 0xac, 0xa5, 0x76, 0x28, 0x2d, 0x36, 0x63, 0x1b, 0x56, 0x4d, 0xeb, 0xdf, 0xa6, 0x48]; let expected = "+-----------------+\n\ | . |\n\ | + . |\n\ | . B . |\n\ | o * + |\n\ | X * S |\n\ | + O o . . |\n\ | . E . o |\n\ | . . o |\n\ | . . |\n\ +-----------------+\n"; println!("'{}'", expected); println!("'{}'", drunken_bishop(&input[..], OPENSSL, BoxMode::Ascii)); assert_eq!(drunken_bishop(&input[..], OPENSSL, BoxMode::Ascii), expected); } #[test] fn test2() { let input = [0xb6, 0xdd, 0xb7, 0x1f, 0xbc, 0x25, 0x31, 0xd3, 0x12, 0xf4, 0x92, 0x1c, 0x0b, 0x93, 0x5f, 0x4b]; let expected = "+-----------------+\n\ | o.o |\n\ | .= E.|\n\ | .B.o|\n\ | .= |\n\ | S = .|\n\ | . o . .= |\n\ | . . . oo.|\n\ | . o+|\n\ | .o.|\n\ +-----------------+\n"; println!("'{}'", expected); println!("'{}'", drunken_bishop(&input[..], OPENSSL, BoxMode::Ascii)); assert_eq!(drunken_bishop(&input[..], OPENSSL, BoxMode::Ascii), expected); } #[test] fn test3() { let input = [0x05, 0x1e, 0x1e, 0xc1, 0xac, 0xb9, 0xd1, 0x1c, 0x6a, 0x60, 0xce, 0x0f, 0x77, 0x6c, 0x78, 0x47]; let expected = "+-----------------+\n\ | o=. |\n\ | o o++E |\n\ | + . Ooo. |\n\ | + O B.. |\n\ | = *S. |\n\ | o |\n\ | |\n\ | |\n\ | |\n\ +-----------------+\n"; println!("'{}'", expected); println!("'{}'", drunken_bishop(&input[..], OPENSSL, BoxMode::Ascii)); assert_eq!(drunken_bishop(&input[..], OPENSSL, BoxMode::Ascii), expected); } #[test] fn test4() { let input = [0x17, 0xcd, 0xe2, 0xab, 0x1a, 0x4b, 0x7d, 0x97, 0x89, 0xd9, 0xc3, 0x7b, 0xb9, 0x12, 0x08, 0x48]; let expected = "┌─────────────────┐\n\ │ │\n\ │ E o │\n\ │ . . o o │\n\ │ . .. o │\n\ │ S.o. │\n\ │ . ..*.o │\n\ │ o . = B. . │\n\ │ . o o ..oo │\n\ │ o.. .o.. │\n\ └─────────────────┘\n"; println!("'{}'", expected); println!("'{}'", drunken_bishop(&input[..], OPENSSL, BoxMode::Unicode)); assert_eq!(drunken_bishop(&input[..], OPENSSL, BoxMode::Unicode), expected); }