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/*
This file is part of libmicrohttpd
Copyright (C) 2019-2021 Karlson2k (Evgeny Grin)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library.
If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file microhttpd/mhd_bithelpers.h
* @brief macros for bits manipulations
* @author Karlson2k (Evgeny Grin)
*/
#ifndef MHD_BITHELPERS_H
#define MHD_BITHELPERS_H 1
#include "mhd_options.h"
#include <stdint.h>
#if defined(_MSC_FULL_VER) && (! defined(__clang__) || (defined(__c2__) && \
defined(__OPTIMIZE__)))
/* Declarations for VC & Clang/C2 built-ins */
#include <intrin.h>
#endif /* _MSC_FULL_VER */
#include "mhd_byteorder.h"
#if _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN || _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#include "mhd_align.h"
#endif /* _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN ||
_MHD_BYTE_ORDER == _MHD_BIG_ENDIAN */
#ifndef __has_builtin
/* Avoid precompiler errors with non-clang */
# define __has_builtin(x) 0
# define _MHD_has_builtin_dummy 1
#endif
#ifdef MHD_HAVE___BUILTIN_BSWAP32
#define _MHD_BYTES_SWAP32(value32) \
((uint32_t) __builtin_bswap32 ((uint32_t) value32))
#elif defined(_MSC_FULL_VER) && (! defined(__clang__) || (defined(__c2__) && \
defined(__OPTIMIZE__)))
/* Clang/C2 may not inline this function if optimizations are turned off. */
#ifndef __clang__
#pragma intrinsic(_byteswap_ulong)
#endif /* ! __clang__ */
#define _MHD_BYTES_SWAP32(value32) \
((uint32_t) _byteswap_ulong ((uint32_t) value32))
#elif __has_builtin (__builtin_bswap32)
#define _MHD_BYTES_SWAP32(value32) \
((uint32_t) __builtin_bswap32 ((uint32_t) value32))
#else /* ! __has_builtin(__builtin_bswap32) */
#define _MHD_BYTES_SWAP32(value32) \
( (((uint32_t) (value32)) << 24) \
| ((((uint32_t) (value32)) & ((uint32_t) 0x0000FF00)) << 8) \
| ((((uint32_t) (value32)) & ((uint32_t) 0x00FF0000)) >> 8) \
| (((uint32_t) (value32)) >> 24) )
#endif /* ! __has_builtin(__builtin_bswap32) */
#ifdef MHD_HAVE___BUILTIN_BSWAP64
#define _MHD_BYTES_SWAP64(value64) \
((uint64_t) __builtin_bswap64 ((uint64_t) value64))
#elif defined(_MSC_FULL_VER) && (! defined(__clang__) || (defined(__c2__) && \
defined(__OPTIMIZE__)))
/* Clang/C2 may not inline this function if optimizations are turned off. */
#ifndef __clang__
#pragma intrinsic(_byteswap_uint64)
#endif /* ! __clang__ */
#define _MHD_BYTES_SWAP64(value64) \
((uint64_t) _byteswap_uint64 ((uint64_t) value64))
#elif __has_builtin (__builtin_bswap64)
#define _MHD_BYTES_SWAP64(value64) \
((uint64_t) __builtin_bswap64 ((uint64_t) value64))
#else /* ! __has_builtin(__builtin_bswap64) */
#define _MHD_BYTES_SWAP64(value64) \
( (((uint64_t) (value64)) << 56) \
| ((((uint64_t) (value64)) & ((uint64_t) 0x000000000000FF00)) << 40) \
| ((((uint64_t) (value64)) & ((uint64_t) 0x0000000000FF0000)) << 24) \
| ((((uint64_t) (value64)) & ((uint64_t) 0x00000000FF000000)) << 8) \
| ((((uint64_t) (value64)) & ((uint64_t) 0x000000FF00000000)) >> 8) \
| ((((uint64_t) (value64)) & ((uint64_t) 0x0000FF0000000000)) >> 24) \
| ((((uint64_t) (value64)) & ((uint64_t) 0x00FF000000000000)) >> 40) \
| (((uint64_t) (value64)) >> 56) )
#endif /* ! __has_builtin(__builtin_bswap64) */
/* _MHD_PUT_64BIT_LE (addr, value64)
* put native-endian 64-bit value64 to addr
* in little-endian mode.
*/
/* Slow version that works with unaligned addr and with any bytes order */
#define _MHD_PUT_64BIT_LE_SLOW(addr, value64) do { \
((uint8_t*) (addr))[0] = (uint8_t) ((uint64_t) (value64)); \
((uint8_t*) (addr))[1] = (uint8_t) (((uint64_t) (value64)) >> 8); \
((uint8_t*) (addr))[2] = (uint8_t) (((uint64_t) (value64)) >> 16); \
((uint8_t*) (addr))[3] = (uint8_t) (((uint64_t) (value64)) >> 24); \
((uint8_t*) (addr))[4] = (uint8_t) (((uint64_t) (value64)) >> 32); \
((uint8_t*) (addr))[5] = (uint8_t) (((uint64_t) (value64)) >> 40); \
((uint8_t*) (addr))[6] = (uint8_t) (((uint64_t) (value64)) >> 48); \
((uint8_t*) (addr))[7] = (uint8_t) (((uint64_t) (value64)) >> 56); \
} while (0)
#if _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
#define _MHD_PUT_64BIT_LE(addr, value64) \
((*(uint64_t*) (addr)) = (uint64_t) (value64))
#elif _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#define _MHD_PUT_64BIT_LE(addr, value64) \
((*(uint64_t*) (addr)) = _MHD_BYTES_SWAP64 (value64))
#else /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
/* Endianness was not detected or non-standard like PDP-endian */
#define _MHD_PUT_64BIT_LE(addr, value64) do { \
((uint8_t*) (addr))[0] = (uint8_t) ((uint64_t) (value64)); \
((uint8_t*) (addr))[1] = (uint8_t) (((uint64_t) (value64)) >> 8); \
((uint8_t*) (addr))[2] = (uint8_t) (((uint64_t) (value64)) >> 16); \
((uint8_t*) (addr))[3] = (uint8_t) (((uint64_t) (value64)) >> 24); \
((uint8_t*) (addr))[4] = (uint8_t) (((uint64_t) (value64)) >> 32); \
((uint8_t*) (addr))[5] = (uint8_t) (((uint64_t) (value64)) >> 40); \
((uint8_t*) (addr))[6] = (uint8_t) (((uint64_t) (value64)) >> 48); \
((uint8_t*) (addr))[7] = (uint8_t) (((uint64_t) (value64)) >> 56); \
} while (0)
/* Indicate that _MHD_PUT_64BIT_LE does not need aligned pointer */
#define _MHD_PUT_64BIT_LE_UNALIGNED 1
#endif /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
/* Put result safely to unaligned address */
_MHD_static_inline void
_MHD_PUT_64BIT_LE_SAFE (void *dst, uint64_t value)
{
#ifndef _MHD_PUT_64BIT_LE_UNALIGNED
if (0 != ((uintptr_t) dst) % (_MHD_UINT64_ALIGN))
_MHD_PUT_64BIT_LE_SLOW (dst, value);
else
#endif /* ! _MHD_PUT_64BIT_LE_UNALIGNED */
_MHD_PUT_64BIT_LE (dst, value);
}
/* _MHD_PUT_32BIT_LE (addr, value32)
* put native-endian 32-bit value32 to addr
* in little-endian mode.
*/
#if _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
#define _MHD_PUT_32BIT_LE(addr,value32) \
((*(uint32_t*) (addr)) = (uint32_t) (value32))
#elif _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#define _MHD_PUT_32BIT_LE(addr, value32) \
((*(uint32_t*) (addr)) = _MHD_BYTES_SWAP32 (value32))
#else /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
/* Endianness was not detected or non-standard like PDP-endian */
#define _MHD_PUT_32BIT_LE(addr, value32) do { \
((uint8_t*) (addr))[0] = (uint8_t) ((uint32_t) (value32)); \
((uint8_t*) (addr))[1] = (uint8_t) (((uint32_t) (value32)) >> 8); \
((uint8_t*) (addr))[2] = (uint8_t) (((uint32_t) (value32)) >> 16); \
((uint8_t*) (addr))[3] = (uint8_t) (((uint32_t) (value32)) >> 24); \
} while (0)
/* Indicate that _MHD_PUT_32BIT_LE does not need aligned pointer */
#define _MHD_PUT_32BIT_LE_UNALIGNED 1
#endif /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
/* _MHD_GET_32BIT_LE (addr)
* get little-endian 32-bit value storied at addr
* and return it in native-endian mode.
*/
#if _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
#define _MHD_GET_32BIT_LE(addr) \
(*(const uint32_t*) (addr))
#elif _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#define _MHD_GET_32BIT_LE(addr) \
_MHD_BYTES_SWAP32 (*(const uint32_t*) (addr))
#else /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
/* Endianness was not detected or non-standard like PDP-endian */
#define _MHD_GET_32BIT_LE(addr) \
( ( (uint32_t) (((const uint8_t*) addr)[0])) \
| (((uint32_t) (((const uint8_t*) addr)[1])) << 8) \
| (((uint32_t) (((const uint8_t*) addr)[2])) << 16) \
| (((uint32_t) (((const uint8_t*) addr)[3])) << 24) )
/* Indicate that _MHD_GET_32BIT_LE does not need aligned pointer */
#define _MHD_GET_32BIT_LE_UNALIGNED 1
#endif /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
/* _MHD_PUT_64BIT_BE (addr, value64)
* put native-endian 64-bit value64 to addr
* in big-endian mode.
*/
/* Slow version that works with unaligned addr and with any bytes order */
#define _MHD_PUT_64BIT_BE_SLOW(addr, value64) do { \
((uint8_t*) (addr))[7] = (uint8_t) ((uint64_t) (value64)); \
((uint8_t*) (addr))[6] = (uint8_t) (((uint64_t) (value64)) >> 8); \
((uint8_t*) (addr))[5] = (uint8_t) (((uint64_t) (value64)) >> 16); \
((uint8_t*) (addr))[4] = (uint8_t) (((uint64_t) (value64)) >> 24); \
((uint8_t*) (addr))[3] = (uint8_t) (((uint64_t) (value64)) >> 32); \
((uint8_t*) (addr))[2] = (uint8_t) (((uint64_t) (value64)) >> 40); \
((uint8_t*) (addr))[1] = (uint8_t) (((uint64_t) (value64)) >> 48); \
((uint8_t*) (addr))[0] = (uint8_t) (((uint64_t) (value64)) >> 56); \
} while (0)
#if _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#define _MHD_PUT_64BIT_BE(addr, value64) \
((*(uint64_t*) (addr)) = (uint64_t) (value64))
#elif _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
#define _MHD_PUT_64BIT_BE(addr, value64) \
((*(uint64_t*) (addr)) = _MHD_BYTES_SWAP64 (value64))
#else /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/* Endianness was not detected or non-standard like PDP-endian */
#define _MHD_PUT_64BIT_BE(addr, value64) _MHD_PUT_64BIT_BE_SLOW(addr, value64)
/* Indicate that _MHD_PUT_64BIT_BE does not need aligned pointer */
#define _MHD_PUT_64BIT_BE_UNALIGNED 1
#endif /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/* Put result safely to unaligned address */
_MHD_static_inline void
_MHD_PUT_64BIT_BE_SAFE (void *dst, uint64_t value)
{
#ifndef _MHD_PUT_64BIT_BE_UNALIGNED
if (0 != ((uintptr_t) dst) % (_MHD_UINT64_ALIGN))
_MHD_PUT_64BIT_BE_SLOW (dst, value);
else
#endif /* ! _MHD_PUT_64BIT_BE_UNALIGNED */
_MHD_PUT_64BIT_BE (dst, 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.
*/
#if _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#define _MHD_PUT_32BIT_BE(addr, value32) \
((*(uint32_t*) (addr)) = (uint32_t) (value32))
#elif _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
#define _MHD_PUT_32BIT_BE(addr, value32) \
((*(uint32_t*) (addr)) = _MHD_BYTES_SWAP32 (value32))
#else /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/* Endianness was not detected or non-standard like PDP-endian */
#define _MHD_PUT_32BIT_BE(addr, value32) do { \
((uint8_t*) (addr))[3] = (uint8_t) ((uint32_t) (value32)); \
((uint8_t*) (addr))[2] = (uint8_t) (((uint32_t) (value32)) >> 8); \
((uint8_t*) (addr))[1] = (uint8_t) (((uint32_t) (value32)) >> 16); \
((uint8_t*) (addr))[0] = (uint8_t) (((uint32_t) (value32)) >> 24); \
} while (0)
/* Indicate that _MHD_PUT_32BIT_BE does not need aligned pointer */
#define _MHD_PUT_32BIT_BE_UNALIGNED 1
#endif /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/* _MHD_GET_32BIT_BE (addr)
* get big-endian 32-bit value storied at addr
* and return it in native-endian mode.
*/
#if _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#define _MHD_GET_32BIT_BE(addr) \
(*(const uint32_t*) (addr))
#elif _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
#define _MHD_GET_32BIT_BE(addr) \
_MHD_BYTES_SWAP32 (*(const uint32_t*) (addr))
#else /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/* Endianness was not detected or non-standard like PDP-endian */
#define _MHD_GET_32BIT_BE(addr) \
( (((uint32_t) (((const uint8_t*) addr)[0])) << 24) \
| (((uint32_t) (((const uint8_t*) addr)[1])) << 16) \
| (((uint32_t) (((const uint8_t*) addr)[2])) << 8) \
| ((uint32_t) (((const uint8_t*) addr)[3])) )
/* Indicate that _MHD_GET_32BIT_BE does not need aligned pointer */
#define _MHD_GET_32BIT_BE_UNALIGNED 1
#endif /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/**
* Rotate right 32-bit value by number of bits.
* bits parameter must be more than zero and must be less than 32.
*/
#if defined(_MSC_FULL_VER) && (! defined(__clang__) || (defined(__c2__) && \
defined(__OPTIMIZE__)))
/* Clang/C2 do not inline this function if optimizations are turned off. */
#ifndef __clang__
#pragma intrinsic(_rotr)
#endif /* ! __clang__ */
#define _MHD_ROTR32(value32, bits) \
((uint32_t) _rotr ((uint32_t) (value32),(bits)))
#elif __has_builtin (__builtin_rotateright32)
#define _MHD_ROTR32(value32, bits) \
((uint32_t) __builtin_rotateright32 ((value32), (bits)))
#else /* ! __builtin_rotateright32 */
_MHD_static_inline uint32_t
_MHD_ROTR32 (uint32_t value32, int bits)
{
bits %= 32;
if (0 == bits)
return value32;
/* Defined in form which modern compiler could optimize. */
return (value32 >> bits) | (value32 << (32 - bits));
}
#endif /* ! __builtin_rotateright32 */
/**
* Rotate left 32-bit value by number of bits.
* bits parameter must be more than zero and must be less than 32.
*/
#if defined(_MSC_FULL_VER) && (! defined(__clang__) || (defined(__c2__) && \
defined(__OPTIMIZE__)))
/* Clang/C2 do not inline this function if optimizations are turned off. */
#ifndef __clang__
#pragma intrinsic(_rotl)
#endif /* ! __clang__ */
#define _MHD_ROTL32(value32, bits) \
((uint32_t) _rotl ((uint32_t) (value32),(bits)))
#elif __has_builtin (__builtin_rotateleft32)
#define _MHD_ROTL32(value32, bits) \
((uint32_t) __builtin_rotateleft32 ((value32), (bits)))
#else /* ! __builtin_rotateleft32 */
_MHD_static_inline uint32_t
_MHD_ROTL32 (uint32_t value32, int bits)
{
bits %= 32;
if (0 == bits)
return value32;
/* Defined in form which modern compiler could optimize. */
return (value32 << bits) | (value32 >> (32 - 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 */
# undef __has_builtin
#endif
#endif /* ! MHD_BITHELPERS_H */
|