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authorLibravatar Junio C Hamano <gitster@pobox.com>2014-07-22 10:25:02 -0700
committerLibravatar Junio C Hamano <gitster@pobox.com>2014-07-22 10:25:02 -0700
commit1fbc6e6e6062c14f21d0d826aaa3c154dba0f9e8 (patch)
tree1bf30993794760962ed4b1bf5caba03733f0ad31
parentMerge branch 'lt/request-pull' into maint (diff)
parentcompat/bswap.h: fix endianness detection (diff)
downloadtgif-1fbc6e6e6062c14f21d0d826aaa3c154dba0f9e8.tar.xz
Merge branch 'cb/byte-order' into maint
* cb/byte-order: compat/bswap.h: fix endianness detection compat/bswap.h: restore preference __BIG_ENDIAN over BIG_ENDIAN compat/bswap.h: detect endianness on more platforms that don't use BYTE_ORDER
-rw-r--r--compat/bswap.h33
1 files changed, 24 insertions, 9 deletions
diff --git a/compat/bswap.h b/compat/bswap.h
index 120c6c1d37..f6fd9a6a6c 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(_LITTLE_ENDIAN) && !defined(_BIG_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