hexhex: a simple hex viewer library for testing purposes.

.gitignore

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+/target
+Cargo.lock

Cargo.toml

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+[package]
+name = "hexhex"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/lib.rs

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+fn print_printable_or_dot(chunk: &[u8]) {
+    for (idx, byte) in chunk.iter().enumerate() {
+        if idx > 0 && idx % 8 == 0 {
+            print!(" ");
+        }
+
+        if *byte >= 32 && *byte <= 126 {
+            print!("{}", String::from_utf8(vec![*byte]).unwrap());
+        } else {
+            print!(".");
+        }
+    }
+}
+
+fn print_offset(offset: usize) {
+    print!("{:08x}  ", offset);
+}
+
+fn print_data_hex(chunk: &[u8]) {
+    for (idx, byte) in chunk.iter().enumerate() {
+        if idx > 0 && idx % 8 == 0 {
+            print!("  ");
+        }
+        print!("{:02x} ", byte);
+    }
+}
+
+pub fn print_hex(data: &[u8]) {
+    let mut offset = 0usize;
+
+    let chunks: Vec<&[u8]> = data.chunks(16).collect();
+
+    for chunk in chunks {
+        print_offset(offset);
+        print_data_hex(chunk);
+        print_printable_or_dot(chunk);
+        println!();
+        offset += 16;
+    }
+}