Add main structure of Emulator & Chip8 crate

src/main.rs

@@ -0,0 +1,59 @@
+use clap::{App, Arg};
+
+use chip8::Chip8;
+
+struct SdlEmulator {
+    w: usize,
+    h: usize,
+    zoom: usize,
+    chip8: Chip8,
+}
+
+impl SdlEmulator {
+    fn new(w: usize, h: usize, zoom: usize) -> SdlEmulator {
+        let mut c = Chip8::new();
+
+        SdlEmulator {
+            w,
+            h,
+            zoom,
+            chip8: c,
+        }
+    }
+    fn draw_graphics(&mut self) {
+        // TODO
+    }
+    fn set_keys(&mut self) {
+        // TODO
+    }
+}
+
+fn main() {
+    let matches = App::new("chip8-rs")
+        .version("0.0.1")
+        .about("chip8 emulator")
+        .arg(
+            Arg::with_name("file")
+                .short("f")
+                .long("file")
+                .takes_value(true)
+                .help("File path of the rom to load"),
+        )
+        .get_matches();
+    let file = matches.value_of("file");
+    let file = match file {
+        Some(file) => file,
+        _ => panic!("Please specify file path of the rom to load"),
+    };
+    println!("{:?}", file);
+
+    let mut e = SdlEmulator::new(64, 32, 8);
+    loop {
+        e.chip8.emulate_cycle();
+        if e.chip8.draw_flag {
+            e.draw_graphics();
+        }
+        e.set_keys();
+        // delay
+    }
+}