From 107a00593a43ad0b03abd5dccb47b6ccb86d5a20 Mon Sep 17 00:00:00 2001
From: Luna <git@l4.pm>
Date: Thu, 11 Jul 2019 10:51:00 -0300
Subject: [PATCH] do larger copies for safety reasons

---
 examples/eq.scri | 2 +-
 src/image.zig    | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/examples/eq.scri b/examples/eq.scri
index 08ac2b4..4d7635e 100644
--- a/examples/eq.scri
+++ b/examples/eq.scri
@@ -1,4 +1,4 @@
 load :0;
-eq 3 1 2 -0.3 0.7;
+# eq 3 1 2 -0.3 0.7;
 eq 10 3 3 -0.9 2;
 quicksave;
diff --git a/src/image.zig b/src/image.zig
index 27c3134..176f6ce 100644
--- a/src/image.zig
+++ b/src/image.zig
@@ -284,9 +284,11 @@ pub const Image = struct {
             out_file,
             file_copy_buf,
             usize(0),
-            seek_pos.start - 1,
+            seek_pos.start + @mod(seek_pos.start, BufferSize),
         );
 
+        _ = c.sf_seek(self.sndfile, @intCast(i64, seek_pos.start), c.SEEK_SET);
+
         var i: usize = seek_pos.start;
         std.debug.warn("\tseek pos start: {} end: {}\n", seek_pos.start, seek_pos.end);
 
@@ -306,7 +308,7 @@ pub const Image = struct {
             out_file,
             file_copy_buf,
             seek_pos.end + 1,
-            file_end,
+            file_end + @mod(file_end, BufferSize),
         );
 
         c.sf_write_sync(out_file);