Subject: [PATCH v2 1/6] bswap: add 64 bit endianness helper get_be64

From: Ben Peart <[email-masked]>
Date: Thu, 18 May 2017 16:13:28 -0400

Add a new get_be64 macro to enable 64 bit endian conversions on memory
that may or may not be aligned.

Signed-off-by: Ben Peart <[email-masked]>
---
 compat/bswap.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/compat/bswap.h b/compat/bswap.h
index d47c003544..f89fe7f4b5 100644
--- a/compat/bswap.h
+++ b/compat/bswap.h
@@ -158,6 +158,7 @@ static inline uint64_t git_bswap64(uint64_t x)
 
 #define get_be16(p)	ntohs(*(unsigned short *)(p))
 #define get_be32(p)	ntohl(*(unsigned int *)(p))
+#define get_be64(p)	ntohll(*(uint64_t *)(p))
 #define put_be32(p, v)	do { *(unsigned int *)(p) = htonl(v); } while (0)
 
 #else
@@ -170,6 +171,9 @@ static inline uint64_t git_bswap64(uint64_t x)
 	(*((unsigned char *)(p) + 1) << 16) | \
 	(*((unsigned char *)(p) + 2) <<  8) | \
 	(*((unsigned char *)(p) + 3) <<  0) )
+#define get_be64(p)	( \
+	((uint64_t)get_be32((unsigned char *)(p) + 0) << 32) | \
+	((uint64_t)get_be32((unsigned char *)(p) + 4) <<  0)
 #define put_be32(p, v)	do { \
 	unsigned int __v = (v); \
 	*((unsigned char *)(p) + 0) = __v >> 24; \
-- 
2.13.0.windows.1.6.g4597375fc3