From c2d51637d9750ca44f98c7dfaad10e6e0265f0a2 Mon Sep 17 00:00:00 2001
From: "W. Felix Handte" <w@felixhandte.com>
Date: Tue, 4 Dec 2018 11:52:40 -0800
Subject: [PATCH] Add Mutual-Exclusion Error

---
 lib/decompress/huf_decompress.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/decompress/huf_decompress.c b/lib/decompress/huf_decompress.c
index 1139d39cd..2cc20da22 100644
--- a/lib/decompress/huf_decompress.c
+++ b/lib/decompress/huf_decompress.c
@@ -43,6 +43,19 @@
 #include "huf.h"
 #include "error_private.h"
 
+/* **************************************************************
+*  Macros
+****************************************************************/
+
+/* These two optional macros force the use one way or another of the two
+ * Huffman decompression implementations. You can't force in both directions
+ * at the same time.
+ */
+#if defined(HUF_FORCE_DECOMPRESS_X1) && \
+    defined(HUF_FORCE_DECOMPRESS_X2)
+#error "Cannot force the use of the X1 and X2 decoders at the same time!"
+#endif
+
 
 /* **************************************************************
 *  Error Management