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Cygwin: define byteswap.h inlines as macros

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The bswap_* "functions" are macros in glibc, so they may be tested for
by the preprocessor (e.g. #ifdef bswap_16).

Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
This commit is contained in:
Yaakov Selkowitz
2016-03-14 22:11:20 -05:00
parent 3237fb31b3
commit 00d2fe1959
1 changed files with 9 additions and 5 deletions
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14
winsup/cygwin/include/byteswap.h
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@@ -16,23 +16,27 @@ extern "C" {
#endif #endif
static __inline unsigned short static __inline unsigned short
bswap_16 (unsigned short __x) __bswap_16 (unsigned short __x)
{ {
return (__x >> 8) | (__x << 8); return (__x >> 8) | (__x << 8);
} }
static __inline unsigned int static __inline unsigned int
bswap_32 (unsigned int __x) __bswap_32 (unsigned int __x)
{ {
return (bswap_16 (__x & 0xffff) << 16) | (bswap_16 (__x >> 16)); return (__bswap_16 (__x & 0xffff) << 16) | (__bswap_16 (__x >> 16));
} }
static __inline unsigned long long static __inline unsigned long long
bswap_64 (unsigned long long __x) __bswap_64 (unsigned long long __x)
{ {
return (((unsigned long long) bswap_32 (__x & 0xffffffffull)) << 32) | (bswap_32 (__x >> 32)); return (((unsigned long long) __bswap_32 (__x & 0xffffffffull)) << 32) | (__bswap_32 (__x >> 32));
} }
#define bswap_16(x) __bswap_16(x)
#define bswap_32(x) __bswap_32(x)
#define bswap_64(x) __bswap_64(x)
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif