From 64a67162abafc95fe672e849f7a647356694e625 Mon Sep 17 00:00:00 2001
From: Mathijs van de Nes <git@mathijs.vd-nes.nl>
Date: Sun, 6 Dec 2015 11:01:51 +0100
Subject: [PATCH] Fix incorrect CRC on large files

The deflate writer did not always accept all data. The extra bytes did end up in the crc
calculation, so they where accounted for twice.

Resolves #8
---
 src/write.rs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/write.rs b/src/write.rs
index 8f407d25..f96d24b1 100644
--- a/src/write.rs
+++ b/src/write.rs
@@ -74,10 +74,16 @@ impl<W: Write+io::Seek> Write for ZipWriter<W>
     fn write(&mut self, buf: &[u8]) -> io::Result<usize>
     {
         if self.files.len() == 0 { return Err(io::Error::new(io::ErrorKind::Other, "No file has been started")) }
-        self.stats.update(buf);
         match self.inner.ref_mut()
         {
-            Some(ref mut w) => w.write(buf),
+            Some(ref mut w) => {
+                let write_result = w.write(buf);
+                if let Ok(count) = write_result {
+                    self.stats.update(&buf[0..count]);
+                }
+                write_result
+
+            }
             None => Err(io::Error::new(io::ErrorKind::BrokenPipe, "ZipWriter was already closed")),
         }
     }