From d623b34f7fd52af1245ce92b1328494a0c15df22 Mon Sep 17 00:00:00 2001
From: Avril <flanchan@cumallover.me>
Date: Mon, 28 Dec 2020 00:19:50 +0000
Subject: [PATCH] work r/w loop okey

---
 src/main.rs |  2 ++
 src/work.rs | 17 ++++++++++++-----
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 2f363e6..2061037 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -8,6 +8,8 @@ mod work;
 
 mod consts;
 
+pub const BUFSIZE: usize = 4096; // 4kb
+
 fn main() {
     println!("Hello, world!");
 }
diff --git a/src/work.rs b/src/work.rs
index aae3cb0..cb1cd5f 100644
--- a/src/work.rs
+++ b/src/work.rs
@@ -2,12 +2,19 @@ use super::*;
 use job::Job;
 use std::io::Read;
 
-pub fn work_on(job: &mut Job) -> Result<(), Box<dyn std::error::Error>>
+pub fn work_on(job: &mut Job) -> Result<usize, Box<dyn std::error::Error>>
 {
     let output = job.output_slice();
-    let mut buf = [0u8; 4096];
-    while let Ok(read) = job.read(&mut buf) {
-	//TODO: copy from `job`'s file into `output`.
+    let output = unsafe {
+	// Required because the compiler thinks we're mutably borrowing the same data later on, even though they are unrelated fields of the struct
+	std::slice::from_raw_parts_mut(output.as_mut_ptr(), output.len())
+    };
+    let mut read=0;
+    loop {
+	match job.read(&mut output[read..])? {
+	    0 => break,
+	    current => read+=current,
+	}
     }
-    todo!()
+    Ok(read)
 }