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-rw-r--r--src/main.rs37
1 files changed, 37 insertions, 0 deletions
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..da0e599
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,37 @@
+use std::{env, fs::File, io::Read};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+ const CHUNK_SIZE: usize = 8;
+
+ let filename = env::args().nth(1).unwrap_or_default();
+ if filename.is_empty() {
+ eprintln!("error missing filename");
+ return Ok(());
+ }
+
+ let mut file = File::open(&filename)?;
+ let mut chunk = Vec::with_capacity(CHUNK_SIZE);
+ let mut idx = 0;
+
+ while {
+ chunk.clear();
+ file.by_ref()
+ .take(CHUNK_SIZE as u64)
+ .read_to_end(&mut chunk)?
+ > 0
+ } {
+ // write index
+ print!("{:010}: ", idx);
+
+ // write hex
+ for byte in &chunk {
+ print!("{:02X} ", byte);
+ }
+
+ // write ascii
+ println!("{}", String::from_utf8_lossy(&chunk).replace('\n', "⏎"));
+ idx += CHUNK_SIZE;
+ }
+
+ Ok(())
+}