Add binary for file compression and decompression

src/bit_buffer.rs

@@ -76,7 +76,6 @@ impl<R: Read> BitReader<R> {
             } else if self.repeat_bits <= 0 {
                 return Err(io::Error::other("No more bits"));
             } else {
-                println!("{}", self.repeat_bits);
                 self.repeat_bits -= 8;
             }
             self.next = 1 << 7;

src/main.rs

@@ -0,0 +1,51 @@
+use std::{
+    env,
+    fs::File,
+    io::{self, BufReader, Read},
+    path::Path,
+};
+
+use sac::modelA::ModelA;
+
+enum Mode {
+    Compress,
+    Decompress,
+}
+type CodeValue = u32;
+
+fn get_file<FilePath: AsRef<Path>>(filepath: FilePath) -> io::Result<Box<dyn Read>> {
+    let f = File::open(&filepath)?;
+    Ok(Box::new(BufReader::new(f)))
+}
+
+fn main() -> io::Result<()> {
+    let args: Vec<String> = env::args().collect();
+    let name = &args[0];
+
+    let (input, mode): (Box<dyn Read>, Mode) = match args.len() {
+        2 if args[1].to_lowercase() == "compress" => (Box::new(io::stdin()), Mode::Compress),
+        2 if args[1].to_lowercase() == "decompress" => (Box::new(io::stdin()), Mode::Decompress),
+
+        3 if args[1].to_lowercase() == "compress" => (get_file(&args[2])?, Mode::Compress),
+        3 if args[1].to_lowercase() == "decompress" => (get_file(&args[2])?, Mode::Decompress),
+
+        _ => {
+            eprintln!("Usage:");
+            eprintln!("{name} compress file > output # compress file and save to output");
+            eprintln!("{name} decompress file > output # decompress file and save to output");
+            return Err(io::Error::other(format!(
+                "Invalid command `{}`",
+                args.join(" ")
+            )));
+        }
+    };
+
+    let model: ModelA<CodeValue> = ModelA::default();
+    let mut output = io::stdout().lock();
+    match mode {
+        Mode::Compress => model.compress(input, &mut output)?,
+        Mode::Decompress => model.decompress(input, &mut output)?,
+    };
+
+    Ok(())
+}