1 files changed, 27 insertions, 0 deletions
diff --git a/spec/mspec/lib/mspec/guards/endian.rb b/spec/mspec/lib/mspec/guards/endian.rb
new file mode 100644
index 0000000000..6bb01263c7
--- /dev/null
+++ b/spec/mspec/lib/mspec/guards/endian.rb
@@ -0,0 +1,27 @@
+require 'mspec/guards/guard'
+
+# Despite that these are inverses, the two classes are
+# used to simplify MSpec guard reporting modes
+
+class EndianGuard < SpecGuard
+  def pattern
+    @pattern ||= [1].pack('L')
+  end
+  private :pattern
+end
+
+class BigEndianGuard < EndianGuard
+  def match?
+    pattern[-1] == ?\001
+  end
+end
+
+class Object
+  def big_endian(&block)
+    BigEndianGuard.new.run_if(:big_endian, &block)
+  end
+
+  def little_endian(&block)
+    BigEndianGuard.new.run_unless(:little_endian, &block)
+  end
+end