File zimg-s390x-unit-tests.patch of Package zimg

From b2bee8460a0f6ecf049e27d0a2090c87e871d951 Mon Sep 17 00:00:00 2001
From: Mike Gorse <mgorse@suse.com>
Date: Wed, 22 Sep 2021 11:57:47 -0500
Subject: [PATCH] FIx unit tests on big endian systems

---
 test/extra/sha1/config.h        | 6 ++++++
 test/graph/filter_validator.cpp | 8 ++++++++
 2 files changed, 14 insertions(+)

diff --git a/test/extra/sha1/config.h b/test/extra/sha1/config.h
index ea853f0..7bc4e00 100644
--- a/test/extra/sha1/config.h
+++ b/test/extra/sha1/config.h
@@ -1,3 +1,5 @@
+#include <endian.h>
+
 #ifndef LITTLE_ENDIAN
   #define LITTLE_ENDIAN 4321
 #endif
@@ -7,5 +9,9 @@
 #endif
 
 #ifndef BYTE_ORDER
+#if defined(__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN)
+  #define BYTE_ORDER BIG_ENDIAN
+#else
   #define BYTE_ORDER LITTLE_ENDIAN
 #endif
+#endif
diff --git a/test/graph/filter_validator.cpp b/test/graph/filter_validator.cpp
index f0d6859..d768ebf 100644
--- a/test/graph/filter_validator.cpp
+++ b/test/graph/filter_validator.cpp
@@ -13,6 +13,8 @@
 
 #include "gtest/gtest.h"
 
+#include <endian.h>
+
 extern "C" {
   #include "sha1/sha1.h"
 }
@@ -40,7 +42,13 @@ void hash_buffer(const AuditBuffer<T> &buf, unsigned p, unsigned width, unsigned
 
 	for (unsigned i = 0; i < height; ++i) {
 		const unsigned char *ptr = static_cast<const unsigned char *>(image_buffer[p][i]);
+#if (__BYTE_ORDER == __LITTLE_ENDIAN)
 		SHA1Update(&sha_ctx, ptr, width * sizeof(T));
+#else
+		for (unsigned j = 0; j < width; j++)
+			for (int k = sizeof(T) - 1; k >= 0; k--)
+				SHA1Update(&sha_ctx, ptr + (j * sizeof(T)) + k, 1);
+#endif
 	}
 
 	SHA1Final(digest, &sha_ctx);
-- 
2.32.0