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mhd_bithelpers: added more 64 bit manipulation functions/macros

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This commit is contained in:
Evgeny Grin (Karlson2k)
2022-09-11 18:40:21 +03:00
parent 3432eaad2a
commit 30d2c2eea9
1 changed files with 56 additions and 0 deletions
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src/microhttpd/mhd_bithelpers.h
+56
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@@ -230,6 +230,31 @@ _MHD_PUT_64BIT_BE_SAFE (void *dst, uint64_t value)
}
/* _MHD_GET_64BIT_BE (addr)
* load 64-bit value located at addr in big endian mode.
*/
#if _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#define _MHD_GET_64BIT_BE(addr) \
(*(const uint64_t*) (addr))
#elif _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
#define _MHD_GET_64BIT_BE(addr) \
_MHD_BYTES_SWAP64 (*(const uint64_t*) (addr))
#else /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/* Endianness was not detected or non-standard like PDP-endian */
#define _MHD_GET_64BIT_BE(addr) \
( (((uint64_t) (((const uint8_t*) addr)[0])) << 56) \
| (((uint64_t) (((const uint8_t*) addr)[1])) << 48) \
| (((uint64_t) (((const uint8_t*) addr)[2])) << 40) \
| (((uint64_t) (((const uint8_t*) addr)[3])) << 32) \
| (((uint64_t) (((const uint8_t*) addr)[4])) << 24) \
| (((uint64_t) (((const uint8_t*) addr)[5])) << 16) \
| (((uint64_t) (((const uint8_t*) addr)[6])) << 8) \
| ((uint64_t) (((const uint8_t*) addr)[7])) )
/* Indicate that _MHD_GET_64BIT_BE does not need aligned pointer */
#define _MHD_GET_64BIT_BE_ALLOW_UNALIGNED 1
#endif /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/* _MHD_PUT_32BIT_BE (addr, value32)
* put native-endian 32-bit value32 to addr
* in big-endian mode.
@@ -333,6 +358,37 @@ _MHD_ROTL32 (uint32_t value32, int bits)
#endif /* ! __builtin_rotateleft32 */
/**
* Rotate right 64-bit value by number of bits.
* bits parameter must be more than zero and must be less than 64.
*/
#if defined(_MSC_FULL_VER) && (! defined(__clang__) || (defined(__c2__) && \
defined(__OPTIMIZE__)))
/* Clang/C2 do not inline this function if optimisations are turned off. */
#ifndef __clang__
#pragma intrinsic(_rotr64)
#endif /* ! __clang__ */
#define _MHD_ROTR64(value64, bits) \
((uint64_t) _rotr64 ((uint64_t) (value64),(bits)))
#elif __has_builtin (__builtin_rotateright64)
#define _MHD_ROTR64(value64, bits) \
((uint64_t) __builtin_rotateright64 ((value64), (bits)))
#else /* ! __builtin_rotateright64 */
_MHD_static_inline uint64_t
_MHD_ROTR64 (uint64_t value64, int bits)
{
bits %= 64;
if (0 == bits)
return value64;
/* Defined in form which modern compiler could optimise. */
return (value64 >> bits) | (value64 << (64 - bits));
}
#endif /* ! __builtin_rotateright64 */
#ifdef _MHD_has_builtin_dummy
/* Remove macro function replacement to avoid misdetection in files which
* include this header */