[PATCH v5 1/7] bswap: add 64 bit endianness helper get_be64
From: Ben Peart <hidden>
Date: 2017-06-10 13:40:53
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 <redacted> --- 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