From fd470c97f7c6a456c4dc87595c70f4fe44a341f5 Mon Sep 17 00:00:00 2001
From: Ishotihadus <hanachan.pao@gmail.com>
Date: Sun, 5 Aug 2018 18:15:33 +0900
Subject: [PATCH] add support for a header of AssetBundle on the last in the
 file

---
 lib/mikunyan/asset_bundle.rb  | 2 +-
 lib/mikunyan/binary_reader.rb | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/mikunyan/asset_bundle.rb b/lib/mikunyan/asset_bundle.rb
index 60b54fc..314c167 100644
--- a/lib/mikunyan/asset_bundle.rb
+++ b/lib/mikunyan/asset_bundle.rb
@@ -73,7 +73,7 @@ module Mikunyan
             ui_block_size = br.i32u
             flags = br.i32u
 
-            head = BinaryReader.new(uncompress(br.read(ci_block_size), ui_block_size, flags))
+            head = BinaryReader.new(uncompress(flags & 0x80 == 0 ? br.read(ci_block_size) : br.read_abs(ci_block_size, file_size - ci_block_size), ui_block_size, flags))
             guid = head.read(16)
 
             blocks = []
diff --git a/lib/mikunyan/binary_reader.rb b/lib/mikunyan/binary_reader.rb
index 1e8beeb..19da576 100644
--- a/lib/mikunyan/binary_reader.rb
+++ b/lib/mikunyan/binary_reader.rb
@@ -51,6 +51,14 @@ module Mikunyan
             data
         end
 
+        # Read given size of binary string from specified position. This method does not seek.
+        # @param [Integer] size size
+        # @param [Integer] pos position
+        # @return [String] data
+        def read_abs(size, pos)
+            @data.byteslice(pos, size)
+        end
+
         # Read string until null character
         # @return [String] string
         def cstr