initial commit

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "hd"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "hd"
+version = "0.1.0"
+authors = ["JayPiKay <jpk@goatpr0n.de>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/main.rs

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+use std::env;
+use std::io::prelude::*;
+use std::fs::File;
+
+const GLOBAL_BUFFER_LENGTH: usize = 16;
+
+fn get_file(filename: String) -> File {
+    match File::open(filename) {
+        Ok(f) => File::from(f),
+        Err(e) => {
+            panic!(e);
+        }
+    }
+}
+
+fn dump_to_hex(bytes: &mut [u8]) -> String {
+    let out_vec: Vec<String> = bytes.chunks(2)
+        .map(|c| {
+            if c.len() == 2 { format!("{:02x}{:02x}", c[0], c[1]) }
+            else { format!("{:02x}", c[0]) }
+        }).collect();
+    out_vec.join(" ")
+}
+
+fn dump_to_chr(bytes: &mut [u8]) -> String {
+    let out_vec: Vec<String> = bytes.iter().map(|ord| {
+        if *ord >= 32 && *ord <= 126 { (*ord as char).to_string() }
+        else { '.'.to_string() }
+    }).collect();
+
+    out_vec.join("")
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    if args.len() < 2 {
+        panic!("Not enough arguments!");
+    }
+
+    let filename = &args[1];
+    let mut open_file = get_file(filename.to_string());
+
+    let mut buf = [0; GLOBAL_BUFFER_LENGTH];
+    let mut offset: usize = 0;
+
+    loop {
+        let bytes_read = open_file.read(&mut buf);
+        match bytes_read {
+            Ok(num) => {
+                if num == 0 {
+                    break;
+                } else {
+                    println!("{:08x}: {:40} {:10}",
+                             offset,
+                             dump_to_hex(&mut buf[0..num]),
+                             dump_to_chr(&mut buf[0..num]));
+                    offset += GLOBAL_BUFFER_LENGTH;
+                }
+            },
+            Err(e) => {
+                eprintln!("hd: {}", e);
+                break;
+            }
+        }
+    }
+}