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bswap: convert get_be16, get_be32 and put_be32 to inline functions

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Simplify the implementation and allow callers to use expressions with
side-effects by turning the macros get_be16, get_be32 and put_be32 into
inline functions.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2017-07-15 21:22:50 +02:00 committed by Junio C Hamano
parent 7780af1e8e
commit 5b114f3bb0
1 changed files with 24 additions and 14 deletions
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38
compat/bswap.h
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@ -162,19 +162,29 @@ static inline uint64_t git_bswap64(uint64_t x)
#else
#define get_be16(p) ( \
(*((unsigned char *)(p) + 0) << 8) | \
(*((unsigned char *)(p) + 1) << 0) )
#define get_be32(p) ( \
((uint32_t)*((unsigned char *)(p) + 0) << 24) | \
((uint32_t)*((unsigned char *)(p) + 1) << 16) | \
((uint32_t)*((unsigned char *)(p) + 2) << 8) | \
((uint32_t)*((unsigned char *)(p) + 3) << 0) )
#define put_be32(p, v) do { \
unsigned int __v = (v); \
*((unsigned char *)(p) + 0) = __v >> 24; \
*((unsigned char *)(p) + 1) = __v >> 16; \
*((unsigned char *)(p) + 2) = __v >> 8; \
*((unsigned char *)(p) + 3) = __v >> 0; } while (0)
static inline uint16_t get_be16(const void *ptr)
{
const unsigned char *p = ptr;
return (uint16_t)p[0] << 8 |
(uint16_t)p[1] << 0;
}
static inline uint32_t get_be32(const void *ptr)
{
const unsigned char *p = ptr;
return (uint32_t)p[0] << 24 |
(uint32_t)p[1] << 16 |
(uint32_t)p[2] << 8 |
(uint32_t)p[3] << 0;
}
static inline void put_be32(void *ptr, uint32_t value)
{
unsigned char *p = ptr;
p[0] = value >> 24;
p[1] = value >> 16;
p[2] = value >> 8;
p[3] = value >> 0;
}
#endif