commit 07517fbd6bed63ad794e7790d45b4f369b5f11ff
Author: ddidderr <ddidderr@paul.network>
Date:   Tue Apr 5 08:18:12 2022 +0200

    hexhex: a simple hex viewer library for testing purposes.

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..96ef6c0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..bc5149b
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,8 @@
+[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]
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..4682748
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,40 @@
+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;
+    }
+}