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Diffstat (limited to 'src/common/int-util.h')
| -rw-r--r-- | src/common/int-util.h | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/src/common/int-util.h b/src/common/int-util.h deleted file mode 100644 index 3bcc085e2..000000000 --- a/src/common/int-util.h +++ /dev/null @@ -1,258 +0,0 @@ -// Copyright (c) 2014-2018, The Monero Project -// -// All rights reserved. -// -// Redistribution and use in source and binary forms, with or without modification, are -// permitted provided that the following conditions are met: -// -// 1. Redistributions of source code must retain the above copyright notice, this list of -// conditions and the following disclaimer. -// -// 2. Redistributions in binary form must reproduce the above copyright notice, this list -// of conditions and the following disclaimer in the documentation and/or other -// materials provided with the distribution. -// -// 3. Neither the name of the copyright holder nor the names of its contributors may be -// used to endorse or promote products derived from this software without specific -// prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY -// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF -// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL -// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, -// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF -// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -// -// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers - -#pragma once - -#include <assert.h> -#include <stdbool.h> -#include <stdint.h> -#include <string.h> - -#ifndef _MSC_VER -#include <sys/param.h> -#endif - -#if defined(__ANDROID__) -#include <byteswap.h> -#endif - -#if defined(__sun) && defined(__SVR4) -#include <endian.h> -#endif - -#if defined(_MSC_VER) -#include <stdlib.h> - -static inline uint32_t rol32(uint32_t x, int r) { - static_assert(sizeof(uint32_t) == sizeof(unsigned int), "this code assumes 32-bit integers"); - return _rotl(x, r); -} - -static inline uint64_t rol64(uint64_t x, int r) { - return _rotl64(x, r); -} - -#else - -static inline uint32_t rol32(uint32_t x, int r) { - return (x << (r & 31)) | (x >> (-r & 31)); -} - -static inline uint64_t rol64(uint64_t x, int r) { - return (x << (r & 63)) | (x >> (-r & 63)); -} - -#endif - -static inline uint64_t hi_dword(uint64_t val) { - return val >> 32; -} - -static inline uint64_t lo_dword(uint64_t val) { - return val & 0xFFFFFFFF; -} - -static inline uint64_t mul128(uint64_t multiplier, uint64_t multiplicand, uint64_t* product_hi) { - // multiplier = ab = a * 2^32 + b - // multiplicand = cd = c * 2^32 + d - // ab * cd = a * c * 2^64 + (a * d + b * c) * 2^32 + b * d - uint64_t a = hi_dword(multiplier); - uint64_t b = lo_dword(multiplier); - uint64_t c = hi_dword(multiplicand); - uint64_t d = lo_dword(multiplicand); - - uint64_t ac = a * c; - uint64_t ad = a * d; - uint64_t bc = b * c; - uint64_t bd = b * d; - - uint64_t adbc = ad + bc; - uint64_t adbc_carry = adbc < ad ? 1 : 0; - - // multiplier * multiplicand = product_hi * 2^64 + product_lo - uint64_t product_lo = bd + (adbc << 32); - uint64_t product_lo_carry = product_lo < bd ? 1 : 0; - *product_hi = ac + (adbc >> 32) + (adbc_carry << 32) + product_lo_carry; - assert(ac <= *product_hi); - - return product_lo; -} - -static inline uint64_t div_with_reminder(uint64_t dividend, uint32_t divisor, uint32_t* remainder) { - dividend |= ((uint64_t)*remainder) << 32; - *remainder = dividend % divisor; - return dividend / divisor; -} - -// Long division with 2^32 base -static inline uint32_t div128_32(uint64_t dividend_hi, uint64_t dividend_lo, uint32_t divisor, uint64_t* quotient_hi, uint64_t* quotient_lo) { - uint64_t dividend_dwords[4]; - uint32_t remainder = 0; - - dividend_dwords[3] = hi_dword(dividend_hi); - dividend_dwords[2] = lo_dword(dividend_hi); - dividend_dwords[1] = hi_dword(dividend_lo); - dividend_dwords[0] = lo_dword(dividend_lo); - - *quotient_hi = div_with_reminder(dividend_dwords[3], divisor, &remainder) << 32; - *quotient_hi |= div_with_reminder(dividend_dwords[2], divisor, &remainder); - *quotient_lo = div_with_reminder(dividend_dwords[1], divisor, &remainder) << 32; - *quotient_lo |= div_with_reminder(dividend_dwords[0], divisor, &remainder); - - return remainder; -} - -#define IDENT32(x) ((uint32_t) (x)) -#define IDENT64(x) ((uint64_t) (x)) - -#define SWAP32(x) ((((uint32_t) (x) & 0x000000ff) << 24) | \ - (((uint32_t) (x) & 0x0000ff00) << 8) | \ - (((uint32_t) (x) & 0x00ff0000) >> 8) | \ - (((uint32_t) (x) & 0xff000000) >> 24)) -#define SWAP64(x) ((((uint64_t) (x) & 0x00000000000000ff) << 56) | \ - (((uint64_t) (x) & 0x000000000000ff00) << 40) | \ - (((uint64_t) (x) & 0x0000000000ff0000) << 24) | \ - (((uint64_t) (x) & 0x00000000ff000000) << 8) | \ - (((uint64_t) (x) & 0x000000ff00000000) >> 8) | \ - (((uint64_t) (x) & 0x0000ff0000000000) >> 24) | \ - (((uint64_t) (x) & 0x00ff000000000000) >> 40) | \ - (((uint64_t) (x) & 0xff00000000000000) >> 56)) - -static inline uint32_t ident32(uint32_t x) { return x; } -static inline uint64_t ident64(uint64_t x) { return x; } - -#ifndef __OpenBSD__ -# if defined(__ANDROID__) && defined(__swap32) && !defined(swap32) -# define swap32 __swap32 -# elif !defined(swap32) -static inline uint32_t swap32(uint32_t x) { - x = ((x & 0x00ff00ff) << 8) | ((x & 0xff00ff00) >> 8); - return (x << 16) | (x >> 16); -} -# endif -# if defined(__ANDROID__) && defined(__swap64) && !defined(swap64) -# define swap64 __swap64 -# elif !defined(swap64) -static inline uint64_t swap64(uint64_t x) { - x = ((x & 0x00ff00ff00ff00ff) << 8) | ((x & 0xff00ff00ff00ff00) >> 8); - x = ((x & 0x0000ffff0000ffff) << 16) | ((x & 0xffff0000ffff0000) >> 16); - return (x << 32) | (x >> 32); -} -# endif -#endif /* __OpenBSD__ */ - -#if defined(__GNUC__) -#define UNUSED __attribute__((unused)) -#else -#define UNUSED -#endif -static inline void mem_inplace_ident(void *mem UNUSED, size_t n UNUSED) { } -#undef UNUSED - -static inline void mem_inplace_swap32(void *mem, size_t n) { - size_t i; - for (i = 0; i < n; i++) { - ((uint32_t *) mem)[i] = swap32(((const uint32_t *) mem)[i]); - } -} -static inline void mem_inplace_swap64(void *mem, size_t n) { - size_t i; - for (i = 0; i < n; i++) { - ((uint64_t *) mem)[i] = swap64(((const uint64_t *) mem)[i]); - } -} - -static inline void memcpy_ident32(void *dst, const void *src, size_t n) { - memcpy(dst, src, 4 * n); -} -static inline void memcpy_ident64(void *dst, const void *src, size_t n) { - memcpy(dst, src, 8 * n); -} - -static inline void memcpy_swap32(void *dst, const void *src, size_t n) { - size_t i; - for (i = 0; i < n; i++) { - ((uint32_t *) dst)[i] = swap32(((const uint32_t *) src)[i]); - } -} -static inline void memcpy_swap64(void *dst, const void *src, size_t n) { - size_t i; - for (i = 0; i < n; i++) { - ((uint64_t *) dst)[i] = swap64(((const uint64_t *) src)[i]); - } -} - -#ifdef _MSC_VER -# define LITTLE_ENDIAN 1234 -# define BIG_ENDIAN 4321 -# define BYTE_ORDER LITTLE_ENDIAN -#endif - -#if !defined(BYTE_ORDER) || !defined(LITTLE_ENDIAN) || !defined(BIG_ENDIAN) -static_assert(false, "BYTE_ORDER is undefined. Perhaps, GNU extensions are not enabled"); -#endif - -#if BYTE_ORDER == LITTLE_ENDIAN -#define SWAP32LE IDENT32 -#define SWAP32BE SWAP32 -#define swap32le ident32 -#define swap32be swap32 -#define mem_inplace_swap32le mem_inplace_ident -#define mem_inplace_swap32be mem_inplace_swap32 -#define memcpy_swap32le memcpy_ident32 -#define memcpy_swap32be memcpy_swap32 -#define SWAP64LE IDENT64 -#define SWAP64BE SWAP64 -#define swap64le ident64 -#define swap64be swap64 -#define mem_inplace_swap64le mem_inplace_ident -#define mem_inplace_swap64be mem_inplace_swap64 -#define memcpy_swap64le memcpy_ident64 -#define memcpy_swap64be memcpy_swap64 -#endif - -#if BYTE_ORDER == BIG_ENDIAN -#define SWAP32BE IDENT32 -#define SWAP32LE SWAP32 -#define swap32be ident32 -#define swap32le swap32 -#define mem_inplace_swap32be mem_inplace_ident -#define mem_inplace_swap32le mem_inplace_swap32 -#define memcpy_swap32be memcpy_ident32 -#define memcpy_swap32le memcpy_swap32 -#define SWAP64BE IDENT64 -#define SWAP64LE SWAP64 -#define swap64be ident64 -#define swap64le swap64 -#define mem_inplace_swap64be mem_inplace_ident -#define mem_inplace_swap64le mem_inplace_swap64 -#define memcpy_swap64be memcpy_ident64 -#define memcpy_swap64le memcpy_swap64 -#endif |