From 98475b71bcf5a89c8c1c4c59a0c9f9ade74494f5 Mon Sep 17 00:00:00 2001
From: David Li <li.davidm96@gmail.com>
Date: Tue, 15 Dec 2015 16:25:58 -0500
Subject: Load hexdump of ELF

---
 src/binary.rs    | 79 +++++++++++++++++++++++++++++++++++++++++++++++++-------
 src/lib.rs       |  7 +++++
 src/simulator.rs |  8 +++---
 3 files changed, 81 insertions(+), 13 deletions(-)

diff --git a/src/binary.rs b/src/binary.rs
index 2564637..e1e6d45 100644
--- a/src/binary.rs
+++ b/src/binary.rs
@@ -1,15 +1,76 @@
-pub struct Binary<'a> {
-    words: &'a [u32],
+use std::error::Error;
+use std::fmt;
+use std::fs::File;
+use std::io::{self, BufRead};
+use std::num;
+use std::path::Path;
+use std::str;
+
+pub struct Binary {
+    words: Vec<u32>,
 }
 
-impl<'a> Binary<'a> {
-    pub fn new(words: &'a [u32]) -> Binary<'a> {
-        Binary {
-            words: words,
+#[derive(Debug)]
+pub enum BinaryError {
+    Io(io::Error),
+    Utf8(str::Utf8Error),
+    ParseInt(num::ParseIntError),
+}
+
+impl fmt::Display for BinaryError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            BinaryError::Io(ref err) => err.fmt(f),
+            BinaryError::Utf8(ref err) => err.fmt(f),
+            BinaryError::ParseInt(ref err) => err.fmt(f),
+        }
+    }
+}
+
+impl Error for BinaryError {
+    fn description(&self) -> &str {
+        match *self {
+            BinaryError::Io(ref err) => err.description(),
+            BinaryError::Utf8(ref err) => err.description(),
+            BinaryError::ParseInt(ref err) => err.description(),
         }
     }
+}
+
+impl From<io::Error> for BinaryError {
+    fn from(err: io::Error) -> BinaryError {
+        BinaryError::Io(err)
+    }
+}
 
-    // pub fn new_from_hex_file() -> Binary<'a> {
-        
-    // }
+impl From<str::Utf8Error> for BinaryError {
+    fn from(err: str::Utf8Error) -> BinaryError {
+        BinaryError::Utf8(err)
+    }
+}
+
+impl From<num::ParseIntError> for BinaryError {
+    fn from(err: num::ParseIntError) -> BinaryError {
+        BinaryError::ParseInt(err)
+    }
+}
+
+impl Binary {
+    pub fn new_from_hex_file(path: &Path) -> Result<Binary, BinaryError> {
+        let file = try!(File::open(path));
+        let file = io::BufReader::new(file);
+
+        let mut words: Vec<u32> = Vec::new();
+        for line in file.lines() {
+            let line = try!(line);
+            for bytes in line.as_bytes().chunks(8).rev() {
+                let word = try!(str::from_utf8(bytes));
+                words.push(try!(u32::from_str_radix(word, 16)));
+            }
+        }
+
+        Ok(Binary {
+            words: words,
+        })
+    }
 }
diff --git a/src/lib.rs b/src/lib.rs
index f710c03..8e26888 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,4 @@
+#![feature(as_slice)]
 mod isa;
 mod binary;
 mod memory;
@@ -6,4 +7,10 @@ mod simulator;
 
 #[test]
 fn it_works() {
+    use std::path::Path;
+    println!("Test");
+    match binary::Binary::new_from_hex_file(Path::new("../riscv/kernel.hex")) {
+        Ok(_) => println!("Ok"),
+        Err(err) => println!("Error: {:?}", err),
+    }
 }
diff --git a/src/simulator.rs b/src/simulator.rs
index e965686..86ddfab 100644
--- a/src/simulator.rs
+++ b/src/simulator.rs
@@ -2,8 +2,8 @@ use isa;
 use binary::{Binary};
 use memory::{Memory};
 
-pub struct Simulator<'a> {
-    binary: Binary<'a>,
+pub struct Simulator {
+    binary: Binary,
     num_cores: usize,
     memory: Memory,
 }
@@ -17,8 +17,8 @@ struct RegisterFile {
     registers: [u32; 32],
 }
 
-impl<'a> Simulator<'a> {
-    pub fn new(num_cores: usize, binary: Binary<'a>) -> Simulator<'a> {
+impl Simulator {
+    pub fn new(num_cores: usize, binary: Binary) -> Simulator {
         Simulator {
             binary: binary,
             num_cores: num_cores,
-- 
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