In sha1dc/sha1.c, we #define BIGENDIAN under certain circumstances, and
obviously leave the door open for scenarios where our conditions do not
catch and that constant is #defined elsewhere.

However, we did not expect that anybody would possibly #define BIGENDIAN
to 0, indicating that the current platform is *not* big endian.

This is not just a theoretical consideration: On Windows, the winsock2.h
header file (which is used to allow Git to communicate via network) does
indeed do this.

Let's test for that circumstance, too, and byte-swap as intended in that
case.

This fixes a massive breakage on Windows where current `pu` (having
switched on DC_SHA1 by default) breaks pretty much every single test
case.

Signed-off-by: Johannes Schindelin <johannes.schinde...@gmx.de>
---
Published-As: https://github.com/dscho/git/releases/tag/sha1dc-bigendian=0-v1
Fetch-It-Via: git fetch https://github.com/dscho/git sha1dc-bigendian=0-v1

        Obviously, this patch is based on `next`.

 sha1dc/sha1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sha1dc/sha1.c b/sha1dc/sha1.c
index 6dd0da36084..d99db4f2e1b 100644
--- a/sha1dc/sha1.c
+++ b/sha1dc/sha1.c
@@ -35,7 +35,7 @@
 
 #define sha1_mix(W, t)  (rotate_left(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 
16], 1))
 
-#if defined(BIGENDIAN)
+#if defined(BIGENDIAN) && BIGENDIAN != 0
        #define sha1_load(m, t, temp)  { temp = m[t]; }
 #else
        #define sha1_load(m, t, temp)  { temp = m[t]; sha1_bswap32(temp); }

base-commit: c21884356fab0bc6bc5fa6abcadbda27a112a76c
-- 
2.12.1.windows.1

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