colored_hexdump/
lib.rs

1mod braille;
2use crate::braille::braille_char;
3
4const RESET: &str   = "\x1b[0m";
5const LIGHT_GREY: &str = "\x1b[38;5;242m";
6const GREEN:   &str = "\x1b[32m";
7const YELLOW:  &str = "\x1b[33m";
8const MAGENTA: &str = "\x1b[35m";
9const CYAN:    &str = "\x1b[36m";
10
11/// Produce a colored hexdump with borders
12pub fn hexdump(bytes: &[u8]) -> String {
13    hexyl(bytes, BrailleMode::Mixed)
14}
15
16/// Produce a colored hexdump in the style of xxd
17pub fn xxd(bytes: &[u8]) -> String {
18    xxd_braille(bytes, BrailleMode::Mixed)
19}
20
21
22#[derive(Debug, Clone, Copy, PartialEq, Eq)]
23pub enum BrailleMode {
24    None,
25    Mixed,
26    All,
27}
28
29pub fn hexyl(bytes: &[u8], braille: BrailleMode) -> String {
30    let lines = bytes.len() / 16;
31
32    let mut output = String::from(
33        "┌────────┬─────────────────────────┬─────────────────────────┬────────┬────────┐\n"
34    );
35    
36    let mut index = 0;
37    
38    for line in 0..lines+1 {
39        let mut ascii_line = String::from("│");
40        
41        // address
42        output.push_str(&format!("│{}{:08x}{}│ ", LIGHT_GREY, line * 0x10, RESET));
43        
44        for i in 0..0x10 {
45            // print the colored byte in hexadecimal
46            if index < bytes.len() {
47                output.push_str(&colorize_byte(&bytes[index]));
48                ascii_line.push_str(&colorize_ascii(&bytes[index], braille));
49
50            // fill with whitespace if there are no more bytes
51            } else { 
52                output.push_str("  ");
53                ascii_line.push(' ');
54            }
55            
56            output.push(' ');
57            index += 1;
58            
59            // middle line separator
60            if i == 7 {
61                output.push_str("│ ");
62                ascii_line.push('│');
63            }
64            
65        }
66        
67        output.push_str(&ascii_line);
68        output.push_str("│\n");
69
70        if index >= bytes.len() {
71            break;
72        }
73    }
74    
75    output.push_str(
76        "└────────┴─────────────────────────┴─────────────────────────┴────────┴────────┘"
77    );
78    output
79}
80
81pub fn xxd_braille(bytes: &[u8], braille: BrailleMode) -> String {
82    let lines = bytes.len() / 16;
83
84    let mut output = String::new();
85    let mut index = 0;
86    
87    for line in 0..lines+1 {
88        let mut ascii_line = String::new();
89        
90        // address
91        output.push_str(&format!("{}{:08x}: {}", LIGHT_GREY, line * 0x10, RESET));
92        
93        for i in 0..0x10 {
94            // print the colored byte in hexadecimal
95            if index < bytes.len() {
96                output.push_str(&colorize_byte(&bytes[index]));
97                ascii_line.push_str(&colorize_ascii(&bytes[index], braille));
98
99            // fill with whitespace if there are no more bytes
100            } else { 
101                output.push_str("  ");
102                ascii_line.push(' ');
103            }
104            
105            if i % 2 == 1 {
106                output.push(' ');
107            }
108
109            index += 1;
110        }
111        
112        output.push_str(&ascii_line);
113        output.push_str("\n");
114
115        if index >= bytes.len() {
116            break;
117        }
118    }
119    output
120}
121
122
123fn color(byte: &u8) -> &str {
124    match byte {
125        0x00 => LIGHT_GREY, // null bytes
126        b'\t' | b'\n' | 0x0c | b'\r' | b' ' => GREEN, // ascii whitespace
127        0x21..0x7f => CYAN, // printable ascii
128        ..0x80 => MAGENTA,  // non-printable ascii
129        _ => YELLOW,        // other
130    }
131}
132
133fn colorize_byte(byte: &u8) -> String {
134    format!("{}{:02x}{}", color(byte), byte, RESET)
135}
136
137fn colorize_ascii(byte: &u8, braille: BrailleMode) -> String {
138    let ascii_char = match braille {
139        BrailleMode::All => braille_char(*byte),
140        BrailleMode::Mixed => mixed_braille(*byte),
141        BrailleMode::None => no_braille(*byte),
142    };
143    format!("{}{}{}", color(byte), ascii_char, RESET)
144}
145
146/// Take a u8, return classic chars for value bellow 0x80, and a Braille ascii for other values
147/// It's a pretty Ok compromise in readability
148fn mixed_braille(val: u8) -> char {
149	match val {
150		val if val == 0x00 => '0',
151		val if val == 0x20 => ' ',
152		val if val.is_ascii_whitespace() => '_',
153		val if val > 0x20 && val < 0x7f => val as char,
154		val if val.is_ascii() => '•',
155		val => braille_char(val) // 0x80 and above
156	}
157}
158
159fn no_braille(val: u8) -> char {
160	match val {
161		val if val == 0x00 => '0',
162		val if val == 0x20 => ' ',
163		val if val.is_ascii_whitespace() => '_',
164		val if val > 0x20 && val < 0x7f => val as char,
165		val if val.is_ascii() => '•',
166		_ => 'x' // 0x80 and above
167	}
168}
169
170#[cfg(test)]
171mod tests {
172    use super::*;
173
174    #[test]
175    fn test_hexdump() {
176        let all_bytes: Vec<u8> = (0..=u8::MAX).collect();
177        let result = hexdump(&all_bytes);
178        println!("{}", result);
179        assert_eq!(result, "┌────────┬─────────────────────────┬─────────────────────────┬────────┬────────┐\n│\u{1b}[38;5;242m00000000\u{1b}[0m│ \u{1b}[38;5;242m00\u{1b}[0m \u{1b}[35m01\u{1b}[0m \u{1b}[35m02\u{1b}[0m \u{1b}[35m03\u{1b}[0m \u{1b}[35m04\u{1b}[0m \u{1b}[35m05\u{1b}[0m \u{1b}[35m06\u{1b}[0m \u{1b}[35m07\u{1b}[0m │ \u{1b}[35m08\u{1b}[0m \u{1b}[32m09\u{1b}[0m \u{1b}[32m0a\u{1b}[0m \u{1b}[35m0b\u{1b}[0m \u{1b}[32m0c\u{1b}[0m \u{1b}[32m0d\u{1b}[0m \u{1b}[35m0e\u{1b}[0m \u{1b}[35m0f\u{1b}[0m │\u{1b}[38;5;242m0\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m│\u{1b}[35m•\u{1b}[0m\u{1b}[32m_\u{1b}[0m\u{1b}[32m_\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[32m_\u{1b}[0m\u{1b}[32m_\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m│\n│\u{1b}[38;5;242m00000010\u{1b}[0m│ \u{1b}[35m10\u{1b}[0m \u{1b}[35m11\u{1b}[0m \u{1b}[35m12\u{1b}[0m \u{1b}[35m13\u{1b}[0m \u{1b}[35m14\u{1b}[0m 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│\u{1b}[33m⠛\u{1b}[0m\u{1b}[33m⡛\u{1b}[0m\u{1b}[33m⢛\u{1b}[0m\u{1b}[33m⣛\u{1b}[0m\u{1b}[33m⠻\u{1b}[0m\u{1b}[33m⡻\u{1b}[0m\u{1b}[33m⢻\u{1b}[0m\u{1b}[33m⣻\u{1b}[0m│\u{1b}[33m⠟\u{1b}[0m\u{1b}[33m⡟\u{1b}[0m\u{1b}[33m⢟\u{1b}[0m\u{1b}[33m⣟\u{1b}[0m\u{1b}[33m⠿\u{1b}[0m\u{1b}[33m⡿\u{1b}[0m\u{1b}[33m⢿\u{1b}[0m\u{1b}[33m⣿\u{1b}[0m│\n└────────┴─────────────────────────┴─────────────────────────┴────────┴────────┘");
180    }
181
182    #[test]
183    fn test_xxd() {
184        let all_bytes: Vec<u8> = (0..=u8::MAX).collect();
185        let result = xxd(&all_bytes);
186        println!("{}", result);
187        assert_eq!(result, "\u{1b}[38;5;242m00000000: \u{1b}[0m\u{1b}[38;5;242m00\u{1b}[0m\u{1b}[35m01\u{1b}[0m \u{1b}[35m02\u{1b}[0m\u{1b}[35m03\u{1b}[0m \u{1b}[35m04\u{1b}[0m\u{1b}[35m05\u{1b}[0m \u{1b}[35m06\u{1b}[0m\u{1b}[35m07\u{1b}[0m \u{1b}[35m08\u{1b}[0m\u{1b}[32m09\u{1b}[0m \u{1b}[32m0a\u{1b}[0m\u{1b}[35m0b\u{1b}[0m \u{1b}[32m0c\u{1b}[0m\u{1b}[32m0d\u{1b}[0m \u{1b}[35m0e\u{1b}[0m\u{1b}[35m0f\u{1b}[0m \u{1b}[38;5;242m0\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[32m_\u{1b}[0m\u{1b}[32m_\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[32m_\u{1b}[0m\u{1b}[32m_\u{1b}[0m\u{1b}[35m•\u{1b}[0m\u{1b}[35m•\u{1b}[0m\n\u{1b}[38;5;242m00000010: \u{1b}[0m\u{1b}[35m10\u{1b}[0m\u{1b}[35m11\u{1b}[0m \u{1b}[35m12\u{1b}[0m\u{1b}[35m13\u{1b}[0m \u{1b}[35m14\u{1b}[0m\u{1b}[35m15\u{1b}[0m \u{1b}[35m16\u{1b}[0m\u{1b}[35m17\u{1b}[0m \u{1b}[35m18\u{1b}[0m\u{1b}[35m19\u{1b}[0m 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188    }
189}
colored_hexdump/lib.rs

colored_hexdump/
lib.rs
