Passing all tests i guess

src/ijvm/ijvmreader.rs

@@ -0,0 +1,48 @@
+use std::io::Read;
+use std::fs::File;
+use ijvm::Result;
+use ijvm::binread::BinReadable;
+
+pub struct IJVMReader {
+    pointer: usize,
+    source: Vec<u8>
+}
+
+impl IJVMReader {
+    pub fn new(path: &str) -> Result<IJVMReader> {
+        let file = match File::open(path) {
+            Ok(file) => file,
+            Err(_) => return Err("Could not open file"),
+        };
+        let abc: Vec<u8> = file.bytes().map(|e| e.unwrap()).collect();
+        Ok(IJVMReader {
+            pointer: 0,
+            source: abc
+        })
+    }
+}
+
+impl BinReadable for IJVMReader {
+    fn get(&mut self) -> Result<u8> {
+        if self.pointer >= self.source.len() {
+            return Err("EOF reached")
+        }
+        let byte = self.source[self.pointer];
+        self.pointer += 1;
+        return Ok(byte)
+    }
+
+    fn len(&self) -> usize {
+        return self.source.len()
+    }
+
+    fn cur(&self) -> usize {
+        return self.pointer;
+    }
+
+    fn slice(&mut self, len: usize) -> &[u8] {
+        let slice = &self.source[self.pointer..self.pointer+len];
+        self.pointer += len;
+        slice
+    }
+}