Add cat and ls examples.

examples/cat.rs

@@ -1,7 +1,9 @@
 extern crate rfat;
 
+use std::env;
 use std::fs::File;
 use std::io::BufReader;
+use std::io::prelude::*;
 use std::str;
 
 use rfat::FatFileSystem;
@@ -11,8 +13,8 @@ fn main() {
     let buf_rdr = BufReader::new(file);
     let mut fs = FatFileSystem::new(Box::new(buf_rdr)).unwrap();
     let mut root_dir = fs.root_dir();
-    let entries = root_dir.list().unwrap();
-    for e in entries {
-        println!("{} - size {} - modified {}", e.get_name(), e.get_size(), e.get_modify_time());
-    }
+    let mut file = root_dir.get_file(&env::args().nth(1).unwrap()).unwrap();
+    let mut buf = vec![];
+    file.read_to_end(&mut buf).unwrap();
+    print!("{}", str::from_utf8(&buf).unwrap());
 }

examples/ls.rs

@@ -0,0 +1,40 @@
+extern crate rfat;
+
+use std::env;
+use std::fs::File;
+use std::io::BufReader;
+use std::str;
+
+use rfat::FatFileSystem;
+
+fn format_file_size(size: u64) -> String {
+    const KB: u64 = 1024;
+    const MB: u64 = 1024*KB;
+    const GB: u64 = 1024*MB;
+    if size < 1024 {
+        format!("{}B", size)
+    } else if size < MB {
+        format!("{}KB", size / KB)
+    } else if size < GB {
+        format!("{}KB", size / MB)
+    } else {
+        format!("{}KB", size / GB)
+    }
+}
+
+fn main() {
+    let file = File::open("resources/fat32.img").unwrap();
+    let buf_rdr = BufReader::new(file);
+    let mut fs = FatFileSystem::new(Box::new(buf_rdr)).unwrap();
+    let mut root_dir = fs.root_dir();
+    let mut dir = match env::args().nth(1) {
+        None => root_dir,
+        Some(ref path) if path == "." => root_dir,
+        Some(ref path) => root_dir.get_dir(&path).unwrap(),
+    };
+    let entries = dir.list().unwrap();
+    for e in entries {
+        let modified = e.modified().format("%Y-%m-%d %H:%M:%S").to_string();
+        println!("{:4}  {}  {}", format_file_size(e.len()), modified, e.file_name());
+    }
+}