read a file, print its title maybe

src/main.rs

@@ -1,3 +1,40 @@
+use std::env;
+use std::fs;
+use std::io::Read;
+
 fn main() {
-    println!("Hello, world!");
+    let filename = env::args().nth(1).unwrap();
+    let mut file = fs::File::open(&filename).unwrap();
+    let mut buffer = Vec::new();
+    let _ = file.read_to_end(&mut buffer).unwrap();
+
+    println!("Opened {}, which is {} bytes", filename, buffer.len());
+
+    struct Range {
+        offset: usize,
+        length: usize
+    };
+
+    struct Header {
+        name: &'static str,
+        range: Range
+    };
+
+    let name_header = Header {
+        name: "title",
+        range: Range {
+            offset: 308,
+            length: 16
+        }
+    };
+
+    let headers = vec![name_header];
+
+    for header in headers {
+        let start = header.range.offset;
+        let end = header.range.offset + header.range.length - 1;
+        let mut header_slice = &buffer[start..end];
+        println!("{}: {}", header.name, String::from_utf8_lossy(&mut header_slice));
+    }
+
 }