99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/*
|
|
* Copyright (C) 2006-2009 Vincent Hanquez <tab@snarc.org>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* SHA implementation low level operation
|
|
*/
|
|
|
|
#ifndef BITFN_H
|
|
#define BITFN_H
|
|
#include <stdint.h>
|
|
|
|
// NOTE: Required to build on OpenBSD
|
|
#undef swap32
|
|
#undef swap64
|
|
|
|
static inline unsigned int rol32(unsigned int word, unsigned int shift)
|
|
{
|
|
return (word << shift) | (word >> (32 - shift));
|
|
}
|
|
|
|
static inline unsigned int ror32(unsigned int word, unsigned int shift)
|
|
{
|
|
return (word >> shift) | (word << (32 - shift));
|
|
}
|
|
|
|
static inline uint64_t rol64(uint64_t word, unsigned int shift)
|
|
{
|
|
return (word << shift) | (word >> (64 - shift));
|
|
}
|
|
|
|
static inline uint64_t ror64(uint64_t word, unsigned int shift)
|
|
{
|
|
return (word >> shift) | (word << (64 - shift));
|
|
}
|
|
|
|
#if (defined(__i386__) || defined(__x86_64__)) && !defined(NO_INLINE_ASM)
|
|
static inline unsigned int swap32(unsigned int a)
|
|
{
|
|
asm ("bswap %0" : "=r" (a) : "0" (a));
|
|
return a;
|
|
}
|
|
#else
|
|
static inline unsigned int swap32(unsigned int a)
|
|
{
|
|
return (a << 24) | ((a & 0xff00) << 8) | ((a >> 8) & 0xff00) | (a >> 24);
|
|
}
|
|
#endif
|
|
|
|
#if defined(__x86_64__) && !defined(NO_INLINE_ASM)
|
|
static inline uint64_t swap64(uint64_t a)
|
|
{
|
|
asm ("bswap %0" : "=r" (a) : "0" (a));
|
|
return a;
|
|
}
|
|
#else
|
|
static inline uint64_t swap64(uint64_t a)
|
|
{
|
|
return ((uint64_t) swap32((unsigned int) (a >> 32))) |
|
|
(((uint64_t) swap32((unsigned int) a)) << 32);
|
|
}
|
|
#endif
|
|
|
|
/* big endian to cpu */
|
|
#ifdef __APPLE__
|
|
#include <architecture/byte_order.h>
|
|
#elif defined(__FreeBSD__)
|
|
#include <sys/endian.h>
|
|
#elif _WIN32
|
|
/* nothing */
|
|
#else
|
|
#include <endian.h>
|
|
#endif
|
|
|
|
#if LITTLE_ENDIAN == BYTE_ORDER
|
|
#define be32_to_cpu(a) swap32(a)
|
|
#define cpu_to_be32(a) swap32(a)
|
|
#define be64_to_cpu(a) swap64(a)
|
|
#define cpu_to_be64(a) swap64(a)
|
|
#elif BIG_ENDIAN == BYTE_ORDER
|
|
#define be32_to_cpu(a) (a)
|
|
#define cpu_to_be32(a) (a)
|
|
#define be64_to_cpu(a) (a)
|
|
#define cpu_to_be64(a) (a)
|
|
#else
|
|
#error "endian not supported"
|
|
#endif
|
|
|
|
#endif /* !BITFN_H */
|