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authorCharles Bailey <cbailey32@bloomberg.net>2014-05-02 07:55:29 (GMT)
committerJunio C Hamano <gitster@pobox.com>2014-05-02 19:31:59 (GMT)
commit3cf6bb34063406e107f51aa52db67d65839f5e58 (patch)
tree6b8e2455512f55a18fc4aab1d6803ca2bd56d446 /compat/bswap.h
parent7e76a2f97546444fe7a2af18825450e29c3622a4 (diff)
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compat/bswap.h: detect endianness on more platforms that don't use BYTE_ORDER
Signed-off-by: Charles Bailey <cbailey32@bloomberg.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'compat/bswap.h')
-rw-r--r--compat/bswap.h33
1 files changed, 24 insertions, 9 deletions
diff --git a/compat/bswap.h b/compat/bswap.h
index 120c6c1..f08a9fe 100644
--- a/compat/bswap.h
+++ b/compat/bswap.h
@@ -101,19 +101,34 @@ static inline uint64_t git_bswap64(uint64_t x)
#undef ntohll
#undef htonll
-#if !defined(__BYTE_ORDER)
-# if defined(BYTE_ORDER) && defined(LITTLE_ENDIAN) && defined(BIG_ENDIAN)
-# define __BYTE_ORDER BYTE_ORDER
-# define __LITTLE_ENDIAN LITTLE_ENDIAN
-# define __BIG_ENDIAN BIG_ENDIAN
+#if defined(BYTE_ORDER) && defined(LITTLE_ENDIAN) && defined(BIG_ENDIAN)
+
+# define GIT_BYTE_ORDER BYTE_ORDER
+# define GIT_LITTLE_ENDIAN LITTLE_ENDIAN
+# define GIT_BIG_ENDIAN BIG_ENDIAN
+
+#elif defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN)
+
+# define GIT_BYTE_ORDER __BYTE_ORDER
+# define GIT_LITTLE_ENDIAN __LITTLE_ENDIAN
+# define GIT_BIG_ENDIAN __BIG_ENDIAN
+
+#else
+
+# define GIT_BIG_ENDIAN 4321
+# define GIT_LITTLE_ENDIAN 1234
+
+# if defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)
+# define GIT_BYTE_ORDER GIT_BIG_ENDIAN
+# elif defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)
+# define GIT_BYTE_ORDER GIT_LITTLE_ENDIAN
+# else
+# error "Cannot determine endianness"
# endif
-#endif
-#if !defined(__BYTE_ORDER)
-# error "Cannot determine endianness"
#endif
-#if __BYTE_ORDER == __BIG_ENDIAN
+#if GIT_BYTE_ORDER == GIT_BIG_ENDIAN
# define ntohll(n) (n)
# define htonll(n) (n)
#else