/* * Copyright (c) 2016-2018 Positive Technologies, https://www.ptsecurity.com, * Fast Positive Hash. * * Portions Copyright (c) 2010-2018 Leonid Yuriev , * The 1Hippeus project (t1h). * * This software is provided 'as-is', without any express or implied * warranty. In no event will the authors be held liable for any damages * arising from the use of this software. * * Permission is granted to anyone to use this software for any purpose, * including commercial applications, and to alter it and redistribute it * freely, subject to the following restrictions: * * 1. The origin of this software must not be misrepresented; you must not * claim that you wrote the original software. If you use this software * in a product, an acknowledgement in the product documentation would be * appreciated but is not required. * 2. Altered source versions must be plainly marked as such, and must not be * misrepresented as being the original software. * 3. This notice may not be removed or altered from any source distribution. */ /* * t1ha = { Fast Positive Hash, aka "Позитивный Хэш" } * by [Positive Technologies](https://www.ptsecurity.ru) * * Briefly, it is a 64-bit Hash Function: * 1. Created for 64-bit little-endian platforms, in predominantly for x86_64, * but portable and without penalties it can run on any 64-bit CPU. * 2. In most cases up to 15% faster than City64, xxHash, mum-hash, metro-hash * and all others portable hash-functions (which do not use specific * hardware tricks). * 3. Not suitable for cryptography. * * The Future will Positive. Всё будет хорошо. * * ACKNOWLEDGEMENT: * The t1ha was originally developed by Leonid Yuriev (Леонид Юрьев) * for The 1Hippeus project - zerocopy messaging in the spirit of Sparta! */ #pragma once #ifndef __has_attribute #define __has_attribute(x) (0) #endif #ifndef __has_include #define __has_include(x) (0) #endif #ifndef __GNUC_PREREQ #if defined(__GNUC__) && defined(__GNUC_MINOR__) #define __GNUC_PREREQ(maj, min) \ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) #else #define __GNUC_PREREQ(maj, min) 0 #endif #endif /* __GNUC_PREREQ */ #ifndef __CLANG_PREREQ #ifdef __clang__ #define __CLANG_PREREQ(maj, min) \ ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min)) #else #define __CLANG_PREREQ(maj, min) (0) #endif #endif /* __CLANG_PREREQ */ /*****************************************************************************/ #ifdef _MSC_VER /* Avoid '16' bytes padding added after data member 't1ha_context::total' * and other warnings from std-headers if warning-level > 3. */ #pragma warning(push, 3) #endif #if defined(__cplusplus) && __cplusplus >= 201103L #include #include #include #else #include #include #include #endif /*****************************************************************************/ #if defined(i386) || defined(__386) || defined(__i386) || defined(__i386__) || \ defined(i486) || defined(__i486) || defined(__i486__) || \ defined(i586) | defined(__i586) || defined(__i586__) || defined(i686) || \ defined(__i686) || defined(__i686__) || defined(_M_IX86) || \ defined(_X86_) || defined(__THW_INTEL__) || defined(__I86__) || \ defined(__INTEL__) || defined(__x86_64) || defined(__x86_64__) || \ defined(__amd64__) || defined(__amd64) || defined(_M_X64) || \ defined(_M_AMD64) || defined(__IA32__) || defined(__INTEL__) #ifndef __ia32__ /* LY: define neutral __ia32__ for x86 and x86-64 archs */ #define __ia32__ 1 #endif /* __ia32__ */ #if !defined(__amd64__) && (defined(__x86_64) || defined(__x86_64__) || \ defined(__amd64) || defined(_M_X64)) /* LY: define trusty __amd64__ for all AMD64/x86-64 arch */ #define __amd64__ 1 #endif /* __amd64__ */ #endif /* all x86 */ #if !defined(__BYTE_ORDER__) || !defined(__ORDER_LITTLE_ENDIAN__) || \ !defined(__ORDER_BIG_ENDIAN__) /* *INDENT-OFF* */ /* clang-format off */ #if defined(__GLIBC__) || defined(__GNU_LIBRARY__) || defined(__ANDROID__) || \ defined(HAVE_ENDIAN_H) || __has_include() #include #elif defined(__APPLE__) || defined(__MACH__) || defined(__OpenBSD__) || \ defined(HAVE_MACHINE_ENDIAN_H) || __has_include() #include #elif defined(HAVE_SYS_ISA_DEFS_H) || __has_include() #include #elif (defined(HAVE_SYS_TYPES_H) && defined(HAVE_SYS_ENDIAN_H)) || \ (__has_include() && __has_include()) #include #include #elif defined(__bsdi__) || defined(__DragonFly__) || defined(__FreeBSD__) || \ defined(__NETBSD__) || defined(__NetBSD__) || \ defined(HAVE_SYS_PARAM_H) || __has_include() #include #endif /* OS */ /* *INDENT-ON* */ /* clang-format on */ #if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN) #define __ORDER_LITTLE_ENDIAN__ __LITTLE_ENDIAN #define __ORDER_BIG_ENDIAN__ __BIG_ENDIAN #define __BYTE_ORDER__ __BYTE_ORDER #elif defined(_BYTE_ORDER) && defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN) #define __ORDER_LITTLE_ENDIAN__ _LITTLE_ENDIAN #define __ORDER_BIG_ENDIAN__ _BIG_ENDIAN #define __BYTE_ORDER__ _BYTE_ORDER #else #define __ORDER_LITTLE_ENDIAN__ 1234 #define __ORDER_BIG_ENDIAN__ 4321 #if defined(__LITTLE_ENDIAN__) || \ (defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)) || \ defined(__ARMEL__) || defined(__THUMBEL__) || defined(__AARCH64EL__) || \ defined(__MIPSEL__) || defined(_MIPSEL) || defined(__MIPSEL) || \ defined(_M_ARM) || defined(_M_ARM64) || defined(__e2k__) || \ defined(__elbrus_4c__) || defined(__elbrus_8c__) || defined(__bfin__) || \ defined(__BFIN__) || defined(__ia64__) || defined(_IA64) || \ defined(__IA64__) || defined(__ia64) || defined(_M_IA64) || \ defined(__itanium__) || defined(__ia32__) || defined(__CYGWIN__) || \ defined(_WIN64) || defined(_WIN32) || defined(__TOS_WIN__) || \ defined(__WINDOWS__) #define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__ #elif defined(__BIG_ENDIAN__) || \ (defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)) || \ defined(__ARMEB__) || defined(__THUMBEB__) || defined(__AARCH64EB__) || \ defined(__MIPSEB__) || defined(_MIPSEB) || defined(__MIPSEB) || \ defined(__m68k__) || defined(M68000) || defined(__hppa__) || \ defined(__hppa) || defined(__HPPA__) || defined(__sparc__) || \ defined(__sparc) || defined(__370__) || defined(__THW_370__) || \ defined(__s390__) || defined(__s390x__) || defined(__SYSC_ZARCH__) #define __BYTE_ORDER__ __ORDER_BIG_ENDIAN__ #else #error __BYTE_ORDER__ should be defined. #endif /* Arch */ #endif #endif /* __BYTE_ORDER__ || __ORDER_LITTLE_ENDIAN__ || __ORDER_BIG_ENDIAN__ */ /*****************************************************************************/ #ifndef __dll_export #if defined(_WIN32) || defined(_WIN64) || defined(__CYGWIN__) #if defined(__GNUC__) || __has_attribute(dllexport) #define __dll_export __attribute__((dllexport)) #elif defined(_MSC_VER) #define __dll_export __declspec(dllexport) #else #define __dll_export #endif #elif defined(__GNUC__) || __has_attribute(visibility) #define __dll_export __attribute__((visibility("default"))) #else #define __dll_export #endif #endif /* __dll_export */ #ifndef __dll_import #if defined(_WIN32) || defined(_WIN64) || defined(__CYGWIN__) #if defined(__GNUC__) || __has_attribute(dllimport) #define __dll_import __attribute__((dllimport)) #elif defined(_MSC_VER) #define __dll_import __declspec(dllimport) #else #define __dll_import #endif #else #define __dll_import #endif #endif /* __dll_import */ #if defined(t1ha_EXPORTS) #define T1HA_API __dll_export #elif defined(t1ha_IMPORTS) #define T1HA_API __dll_import #else #define T1HA_API #endif /* T1HA_API */ #if defined(_MSC_VER) #define T1HA_ALIGN_PREFIX __declspec(align(16)) /* required only for SIMD */ #else #define T1HA_ALIGN_PREFIX #endif /* _MSC_VER */ #if defined(__GNUC__) #define T1HA_ALIGN_SUFFIX \ __attribute__((aligned(16))) /* required only for SIMD */ #else #define T1HA_ALIGN_SUFFIX #endif /* GCC x86 */ #ifdef __cplusplus extern "C" { #endif typedef union T1HA_ALIGN_PREFIX t1ha_state256 { uint8_t bytes[32]; uint32_t u32[8]; uint64_t u64[4]; struct { uint64_t a, b, c, d; } n; } t1ha_state256_t T1HA_ALIGN_SUFFIX; typedef struct t1ha_context { t1ha_state256_t state; t1ha_state256_t buffer; size_t partial; uint64_t total; } t1ha_context_t; #ifdef _MSC_VER #pragma warning(pop) #endif /****************************************************************************** * * t1ha2 = 64 and 128-bit, SLIGHTLY MORE ATTENTION FOR QUALITY AND STRENGTH. * * - The recommended version of "Fast Positive Hash" with good quality * for checksum, hash tables and fingerprinting. * - Portable and extremely efficiency on modern 64-bit CPUs. * Designed for 64-bit little-endian platforms, * in other cases will runs slowly. * - Great quality of hashing and still faster than other non-t1ha hashes. * Provides streaming mode and 128-bit result. * * Note: Due performance reason 64- and 128-bit results are completely * different each other, i.e. 64-bit result is NOT any part of 128-bit. */ /* The at-once variant with 64-bit result */ T1HA_API uint64_t t1ha2_atonce(const void *data, size_t length, uint64_t seed); /* The at-once variant with 128-bit result. * Argument `extra_result` is NOT optional and MUST be valid. * The high 64-bit part of 128-bit hash will be always unconditionally * stored to the address given by `extra_result` argument. */ T1HA_API uint64_t t1ha2_atonce128(uint64_t *__restrict extra_result, const void *__restrict data, size_t length, uint64_t seed); /* The init/update/final trinity for streaming. * Return 64 or 128-bit result depentently from `extra_result` argument. */ T1HA_API void t1ha2_init(t1ha_context_t *ctx, uint64_t seed_x, uint64_t seed_y); T1HA_API void t1ha2_update(t1ha_context_t *__restrict ctx, const void *__restrict data, size_t length); /* Argument `extra_result` is optional and MAY be NULL. * - If `extra_result` is NOT NULL then the 128-bit hash will be calculated, * and high 64-bit part of it will be stored to the address given * by `extra_result` argument. * - Otherwise the 64-bit hash will be calculated * and returned from function directly. * * Note: Due performance reason 64- and 128-bit results are completely * different each other, i.e. 64-bit result is NOT any part of 128-bit. */ T1HA_API uint64_t t1ha2_final(t1ha_context_t *__restrict ctx, uint64_t *__restrict extra_result /* optional */); /****************************************************************************** * * t1ha1 = 64-bit, BASELINE FAST PORTABLE HASH: * * - Runs faster on 64-bit platforms in other cases may runs slowly. * - Portable and stable, returns same 64-bit result * on all architectures and CPUs. * - Unfortunately it fails the "strict avalanche criteria", * see test results at https://github.com/demerphq/smhasher. * * This flaw is insignificant for the t1ha1() purposes and imperceptible * from a practical point of view. * However, nowadays this issue has resolved in the next t1ha2(), * that was initially planned to providing a bit more quality. */ /* The little-endian variant. */ T1HA_API uint64_t t1ha1_le(const void *data, size_t length, uint64_t seed); /* The big-endian variant. */ T1HA_API uint64_t t1ha1_be(const void *data, size_t length, uint64_t seed); /* The historical nicname for generic little-endian variant. */ static __inline uint64_t t1ha(const void *data, size_t length, uint64_t seed) { return t1ha1_le(data, length, seed); } #ifdef __cplusplus } #endif