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| author | Ben Peart <benpeart@microsoft.com> | 2017-09-22 16:35:37 (GMT) |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2017-09-24 01:39:37 (GMT) |
| commit | b2e39d0067240e262d77f6c2ac133b77c56bcf1c (patch) | |
| tree | 6dc8d87b31837a36bae88ece2c4f1a61e612169e /compat | |
| parent | 6867272d5b5615bd74ec97bf35b4c4a8d9fe3a51 (diff) | |
| download | git-b2e39d0067240e262d77f6c2ac133b77c56bcf1c.zip git-b2e39d0067240e262d77f6c2ac133b77c56bcf1c.tar.gz git-b2e39d0067240e262d77f6c2ac133b77c56bcf1c.tar.bz2 | |
bswap: add 64 bit endianness helper get_be64
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 <benpeart@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'compat')
| -rw-r--r-- | compat/bswap.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/compat/bswap.h b/compat/bswap.h index 7d063e9..5078ce5 100644 --- a/compat/bswap.h +++ b/compat/bswap.h @@ -158,7 +158,9 @@ 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) +#define put_be64(p, v) do { *(uint64_t *)(p) = htonll(v); } while (0) #else @@ -178,6 +180,13 @@ static inline uint32_t get_be32(const void *ptr) (uint32_t)p[3] << 0; } +static inline uint64_t get_be64(const void *ptr) +{ + const unsigned char *p = ptr; + return (uint64_t)get_be32(&p[0]) << 32 | + (uint64_t)get_be32(&p[4]) << 0; +} + static inline void put_be32(void *ptr, uint32_t value) { unsigned char *p = ptr; @@ -187,4 +196,17 @@ static inline void put_be32(void *ptr, uint32_t value) p[3] = value >> 0; } +static inline void put_be64(void *ptr, uint64_t value) +{ + unsigned char *p = ptr; + p[0] = value >> 56; + p[1] = value >> 48; + p[2] = value >> 40; + p[3] = value >> 32; + p[4] = value >> 24; + p[5] = value >> 16; + p[6] = value >> 8; + p[7] = value >> 0; +} + #endif |