/**

 * WinPR: Windows Portable Runtime

 * System Information

 *

 * Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>

 * Copyright 2013 Bernhard Miklautz <bernhard.miklautz@thincast.com>

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <winpr/config.h>

#include <winpr/assert.h>

#include <winpr/sysinfo.h>

#include <winpr/platform.h>

#if defined(ANDROID)

#include "cpufeatures/cpu-features.h"

#endif

#if defined(__linux__)

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#endif

#if !defined(_WIN32)

#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 199309L)

#include <time.h>

#elif !defined(__APPLE__)

#include <sys/time.h>

#include <sys/sysinfo.h>

#endif

#endif

#include "../log.h"

#define TAG WINPR_TAG("sysinfo")

#define FILETIME_TO_UNIX_OFFSET_S 11644473600UL

#if defined(__MACH__) && defined(__APPLE__)

#include <mach/mach_time.h>

static UINT64 scaleHighPrecision(UINT64 i, UINT32 numer, UINT32 denom)

{

  UINT64 high = (i >> 32) * numer;

  UINT64 low = (i & 0xffffffffull) * numer / denom;

  UINT64 highRem = ((high % denom) << 32) / denom;

  high /= denom;

  return (high << 32) + highRem + low;

}

static UINT64 mac_get_time_ns(void)

{

  mach_timebase_info_data_t timebase = { 0 };

  mach_timebase_info(&timebase);

  UINT64 t = mach_absolute_time();

  return scaleHighPrecision(t, timebase.numer, timebase.denom);

}

#endif

/**

 * api-ms-win-core-sysinfo-l1-1-1.dll:

 *

 * EnumSystemFirmwareTables

 * GetSystemFirmwareTable

 * GetLogicalProcessorInformation

 * GetLogicalProcessorInformationEx

 * GetProductInfo

 * GetSystemDirectoryA

 * GetSystemDirectoryW

 * GetSystemTimeAdjustment

 * GetSystemWindowsDirectoryA

 * GetSystemWindowsDirectoryW

 * GetWindowsDirectoryA

 * GetWindowsDirectoryW

 * GlobalMemoryStatusEx

 * SetComputerNameExW

 * VerSetConditionMask

 */

#ifndef _WIN32

#include <time.h>

#include <sys/time.h>

#ifdef WINPR_HAVE_UNISTD_H

#include <unistd.h>

#endif

#include <winpr/crt.h>

#include <winpr/platform.h>

#if defined(__MACOSX__) || defined(__IOS__) || defined(__FreeBSD__) || defined(__NetBSD__) || \

    defined(__OpenBSD__) || defined(__DragonFly__)

#include <sys/sysctl.h>

#endif

static WORD GetProcessorArchitecture(void)

{

  WORD cpuArch = PROCESSOR_ARCHITECTURE_UNKNOWN;

#if defined(ANDROID)

  AndroidCpuFamily family = android_getCpuFamily();

  switch (family)

  {

    case ANDROID_CPU_FAMILY_ARM:

      return PROCESSOR_ARCHITECTURE_ARM;

    case ANDROID_CPU_FAMILY_X86:

      return PROCESSOR_ARCHITECTURE_INTEL;

    case ANDROID_CPU_FAMILY_MIPS:

      return PROCESSOR_ARCHITECTURE_MIPS;

    case ANDROID_CPU_FAMILY_ARM64:

      return PROCESSOR_ARCHITECTURE_ARM64;

    case ANDROID_CPU_FAMILY_X86_64:

      return PROCESSOR_ARCHITECTURE_AMD64;

    case ANDROID_CPU_FAMILY_MIPS64:

      return PROCESSOR_ARCHITECTURE_MIPS64;

    default:

      return PROCESSOR_ARCHITECTURE_UNKNOWN;

  }

#elif defined(_M_ARM)

  cpuArch = PROCESSOR_ARCHITECTURE_ARM;

#elif defined(_M_IX86)

  cpuArch = PROCESSOR_ARCHITECTURE_INTEL;

#elif defined(_M_MIPS64)

  /* Needs to be before __mips__ since the compiler defines both */

  cpuArch = PROCESSOR_ARCHITECTURE_MIPS64;

#elif defined(_M_MIPS)

  cpuArch = PROCESSOR_ARCHITECTURE_MIPS;

#elif defined(_M_ARM64)

  cpuArch = PROCESSOR_ARCHITECTURE_ARM64;

#elif defined(_M_AMD64)

  cpuArch = PROCESSOR_ARCHITECTURE_AMD64;

#elif defined(_M_PPC)

  cpuArch = PROCESSOR_ARCHITECTURE_PPC;

#elif defined(_M_ALPHA)

  cpuArch = PROCESSOR_ARCHITECTURE_ALPHA;

#elif defined(_M_E2K)

  cpuArch = PROCESSOR_ARCHITECTURE_E2K;

#endif

  return cpuArch;

}

static DWORD GetNumberOfProcessors(void)

{

  DWORD numCPUs = 1;

#if defined(ANDROID)

  return android_getCpuCount();

  /* TODO: iOS */

#elif defined(__linux__) || defined(__sun) || defined(_AIX)

  numCPUs = (DWORD)sysconf(_SC_NPROCESSORS_ONLN);

#elif defined(__MACOSX__) || defined(__FreeBSD__) || defined(__NetBSD__) || \

    defined(__OpenBSD__) || defined(__DragonFly__)

  {

    int mib[4];

    size_t length = sizeof(numCPUs);

    mib[0] = CTL_HW;

#if defined(__FreeBSD__) || defined(__OpenBSD__)

    mib[1] = HW_NCPU;

#else

    mib[1] = HW_AVAILCPU;

#endif

    sysctl(mib, 2, &numCPUs, &length, NULL, 0);

    if (numCPUs < 1)

    {

      mib[1] = HW_NCPU;

      sysctl(mib, 2, &numCPUs, &length, NULL, 0);

      if (numCPUs < 1)

        numCPUs = 1;

    }

  }

#elif defined(__hpux)

  numCPUs = (DWORD)mpctl(MPC_GETNUMSPUS, NULL, NULL);

#elif defined(__sgi)

  numCPUs = (DWORD)sysconf(_SC_NPROC_ONLN);

#endif

  return numCPUs;

}

static DWORD GetSystemPageSize(void)

{

  DWORD dwPageSize = 0;

  long sc_page_size = -1;

#if defined(_SC_PAGESIZE)

  if (sc_page_size < 0)

    sc_page_size = sysconf(_SC_PAGESIZE);

#endif

#if defined(_SC_PAGE_SIZE)

  if (sc_page_size < 0)

    sc_page_size = sysconf(_SC_PAGE_SIZE);

#endif

  if (sc_page_size > 0)

    dwPageSize = (DWORD)sc_page_size;

  if (dwPageSize < 4096)

    dwPageSize = 4096;

  return dwPageSize;

}

void GetSystemInfo(LPSYSTEM_INFO lpSystemInfo)

{

  const SYSTEM_INFO empty = { 0 };

  WINPR_ASSERT(lpSystemInfo);

  *lpSystemInfo = empty;

  lpSystemInfo->DUMMYUNIONNAME.DUMMYSTRUCTNAME.wProcessorArchitecture =

      GetProcessorArchitecture();

  lpSystemInfo->dwPageSize = GetSystemPageSize();

  lpSystemInfo->dwNumberOfProcessors = GetNumberOfProcessors();

}

void GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo)

{

  GetSystemInfo(lpSystemInfo);

}

void GetSystemTime(LPSYSTEMTIME lpSystemTime)

{

  time_t ct = 0;

  struct tm tres;

  struct tm* stm = NULL;

  WORD wMilliseconds = 0;

  UINT64 now = winpr_GetUnixTimeNS();

  ct = WINPR_TIME_NS_TO_S(now);

  wMilliseconds = (WORD)(WINPR_TIME_NS_REM_MS(now));

  stm = gmtime_r(&ct, &tres);

  ZeroMemory(lpSystemTime, sizeof(SYSTEMTIME));

  if (stm)

  {

    lpSystemTime->wYear = (WORD)(stm->tm_year + 1900);

    lpSystemTime->wMonth = (WORD)(stm->tm_mon + 1);

    lpSystemTime->wDayOfWeek = (WORD)stm->tm_wday;

    lpSystemTime->wDay = (WORD)stm->tm_mday;

    lpSystemTime->wHour = (WORD)stm->tm_hour;

    lpSystemTime->wMinute = (WORD)stm->tm_min;

    lpSystemTime->wSecond = (WORD)stm->tm_sec;

    lpSystemTime->wMilliseconds = wMilliseconds;

  }

}

BOOL SetSystemTime(WINPR_ATTR_UNUSED CONST SYSTEMTIME* lpSystemTime)

{

  /* TODO: Implement */

  WLog_ERR("TODO", "TODO: Implement");

  return FALSE;

}

VOID GetLocalTime(LPSYSTEMTIME lpSystemTime)

{

  time_t ct = 0;

  struct tm tres;

  struct tm* ltm = NULL;

  WORD wMilliseconds = 0;

  UINT64 now = winpr_GetUnixTimeNS();

  ct = WINPR_TIME_NS_TO_S(now);

  wMilliseconds = (WORD)(WINPR_TIME_NS_REM_MS(now));

  ltm = localtime_r(&ct, &tres);

  ZeroMemory(lpSystemTime, sizeof(SYSTEMTIME));

  if (ltm)

  {

    lpSystemTime->wYear = (WORD)(ltm->tm_year + 1900);

    lpSystemTime->wMonth = (WORD)(ltm->tm_mon + 1);

    lpSystemTime->wDayOfWeek = (WORD)ltm->tm_wday;

    lpSystemTime->wDay = (WORD)ltm->tm_mday;

    lpSystemTime->wHour = (WORD)ltm->tm_hour;

    lpSystemTime->wMinute = (WORD)ltm->tm_min;

    lpSystemTime->wSecond = (WORD)ltm->tm_sec;

    lpSystemTime->wMilliseconds = wMilliseconds;

  }

}

BOOL SetLocalTime(WINPR_ATTR_UNUSED CONST SYSTEMTIME* lpSystemTime)

{

  /* TODO: Implement */

  WLog_ERR("TODO", "TODO: Implement");

  return FALSE;

}

VOID GetSystemTimeAsFileTime(LPFILETIME lpSystemTimeAsFileTime)

{

  union

  {

    UINT64 u64;

    FILETIME ft;

  } t;

  t.u64 = (winpr_GetUnixTimeNS() / 100ull) + FILETIME_TO_UNIX_OFFSET_S * 10000000ull;

  *lpSystemTimeAsFileTime = t.ft;

}

BOOL GetSystemTimeAdjustment(WINPR_ATTR_UNUSED PDWORD lpTimeAdjustment,

                             WINPR_ATTR_UNUSED PDWORD lpTimeIncrement,

                             WINPR_ATTR_UNUSED PBOOL lpTimeAdjustmentDisabled)

{

  /* TODO: Implement */

  WLog_ERR("TODO", "TODO: Implement");

  return FALSE;

}

#ifndef CLOCK_MONOTONIC_RAW

#define CLOCK_MONOTONIC_RAW 4

#endif

DWORD GetTickCount(void)

{

  return (DWORD)GetTickCount64();

}

#endif // _WIN32

#if !defined(_WIN32) || defined(_UWP)

#if defined(WITH_WINPR_DEPRECATED)

/* OSVERSIONINFOEX Structure:

 * http://msdn.microsoft.com/en-us/library/windows/desktop/ms724833

 */

BOOL GetVersionExA(LPOSVERSIONINFOA lpVersionInformation)

{

#ifdef _UWP

  /* Windows 10 Version Info */

  if ((lpVersionInformation->dwOSVersionInfoSize == sizeof(OSVERSIONINFOA)) ||

      (lpVersionInformation->dwOSVersionInfoSize == sizeof(OSVERSIONINFOEXA)))

  {

    lpVersionInformation->dwMajorVersion = 10;

    lpVersionInformation->dwMinorVersion = 0;

    lpVersionInformation->dwBuildNumber = 0;

    lpVersionInformation->dwPlatformId = VER_PLATFORM_WIN32_NT;

    ZeroMemory(lpVersionInformation->szCSDVersion, sizeof(lpVersionInformation->szCSDVersion));

    if (lpVersionInformation->dwOSVersionInfoSize == sizeof(OSVERSIONINFOEXA))

    {

      LPOSVERSIONINFOEXA lpVersionInformationEx = (LPOSVERSIONINFOEXA)lpVersionInformation;

      lpVersionInformationEx->wServicePackMajor = 0;

      lpVersionInformationEx->wServicePackMinor = 0;

      lpVersionInformationEx->wSuiteMask = 0;

      lpVersionInformationEx->wProductType = VER_NT_WORKSTATION;

      lpVersionInformationEx->wReserved = 0;

    }

    return TRUE;

  }

#else

  /* Windows 7 SP1 Version Info */

  if ((lpVersionInformation->dwOSVersionInfoSize == sizeof(OSVERSIONINFOA)) ||

      (lpVersionInformation->dwOSVersionInfoSize == sizeof(OSVERSIONINFOEXA)))

  {

    lpVersionInformation->dwMajorVersion = 6;

    lpVersionInformation->dwMinorVersion = 1;

    lpVersionInformation->dwBuildNumber = 7601;

    lpVersionInformation->dwPlatformId = VER_PLATFORM_WIN32_NT;

    ZeroMemory(lpVersionInformation->szCSDVersion, sizeof(lpVersionInformation->szCSDVersion));

    if (lpVersionInformation->dwOSVersionInfoSize == sizeof(OSVERSIONINFOEXA))

    {

      LPOSVERSIONINFOEXA lpVersionInformationEx = (LPOSVERSIONINFOEXA)lpVersionInformation;

      lpVersionInformationEx->wServicePackMajor = 1;

      lpVersionInformationEx->wServicePackMinor = 0;

      lpVersionInformationEx->wSuiteMask = 0;

      lpVersionInformationEx->wProductType = VER_NT_WORKSTATION;

      lpVersionInformationEx->wReserved = 0;

    }

    return TRUE;

  }

#endif

  return FALSE;

}

BOOL GetVersionExW(LPOSVERSIONINFOW lpVersionInformation)

{

  ZeroMemory(lpVersionInformation->szCSDVersion, sizeof(lpVersionInformation->szCSDVersion));

  return GetVersionExA((LPOSVERSIONINFOA)lpVersionInformation);

}

#endif

#endif

#if !defined(_WIN32) || defined(_UWP)

BOOL GetComputerNameW(LPWSTR lpBuffer, LPDWORD lpnSize)

{

  BOOL rc = 0;

  LPSTR buffer = NULL;

  if (!lpnSize || (*lpnSize > INT_MAX))

    return FALSE;

  if (*lpnSize > 0)

  {

    buffer = malloc(*lpnSize);

    if (!buffer)

      return FALSE;

  }

  rc = GetComputerNameA(buffer, lpnSize);

  if (rc && (*lpnSize > 0))

  {

    const SSIZE_T res = ConvertUtf8NToWChar(buffer, *lpnSize, lpBuffer, *lpnSize);

    rc = res > 0;

  }

  free(buffer);

  return rc;

}

BOOL GetComputerNameA(LPSTR lpBuffer, LPDWORD lpnSize)

{

  if (!lpnSize)

  {

    SetLastError(ERROR_BAD_ARGUMENTS);

    return FALSE;

  }

  char hostname[256 + 1] = { 0 };

  if (gethostname(hostname, ARRAYSIZE(hostname) - 1) == -1)

    return FALSE;

  size_t length = strnlen(hostname, MAX_COMPUTERNAME_LENGTH);

  const char* dot = strchr(hostname, '.');

  if (dot)

  {

    const size_t dotlen = WINPR_ASSERTING_INT_CAST(size_t, (dot - hostname));

    if (dotlen < length)

      length = dotlen;

  }

  if ((*lpnSize <= (DWORD)length) || !lpBuffer)

  {

    SetLastError(ERROR_BUFFER_OVERFLOW);

    *lpnSize = (DWORD)(length + 1);

    return FALSE;

  }

  strncpy(lpBuffer, hostname, length);

  lpBuffer[length] = '\0';

  *lpnSize = (DWORD)length;

  return TRUE;

}

BOOL GetComputerNameExA(COMPUTER_NAME_FORMAT NameType, LPSTR lpBuffer, LPDWORD lpnSize)

{

  size_t length = 0;

  char hostname[256] = { 0 };

  if (!lpnSize)

  {

    SetLastError(ERROR_BAD_ARGUMENTS);

    return FALSE;

  }

  if ((NameType == ComputerNameNetBIOS) || (NameType == ComputerNamePhysicalNetBIOS))

  {

    BOOL rc = GetComputerNameA(lpBuffer, lpnSize);

    if (!rc)

    {

      if (GetLastError() == ERROR_BUFFER_OVERFLOW)

        SetLastError(ERROR_MORE_DATA);

    }

    return rc;

  }

  if (gethostname(hostname, sizeof(hostname)) == -1)

    return FALSE;

  length = strnlen(hostname, sizeof(hostname));

  switch (NameType)

  {

    case ComputerNameDnsHostname:

    case ComputerNameDnsDomain:

    case ComputerNameDnsFullyQualified:

    case ComputerNamePhysicalDnsHostname:

    case ComputerNamePhysicalDnsDomain:

    case ComputerNamePhysicalDnsFullyQualified:

      if ((*lpnSize <= (DWORD)length) || !lpBuffer)

      {

        *lpnSize = (DWORD)(length + 1);

        SetLastError(ERROR_MORE_DATA);

        return FALSE;

      }

      CopyMemory(lpBuffer, hostname, length);

      lpBuffer[length] = '\0';

      *lpnSize = (DWORD)length;

      break;

    default:

      return FALSE;

  }

  return TRUE;

}

BOOL GetComputerNameExW(COMPUTER_NAME_FORMAT NameType, LPWSTR lpBuffer, LPDWORD lpnSize)

{

  BOOL rc = 0;

  LPSTR lpABuffer = NULL;

  if (!lpnSize)

  {

    SetLastError(ERROR_BAD_ARGUMENTS);

    return FALSE;

  }

  if (*lpnSize > 0)

  {

    lpABuffer = calloc(*lpnSize, sizeof(CHAR));

    if (!lpABuffer)

      return FALSE;

  }

  rc = GetComputerNameExA(NameType, lpABuffer, lpnSize);

  if (rc && (*lpnSize > 0))

  {

    const SSIZE_T res = ConvertUtf8NToWChar(lpABuffer, *lpnSize, lpBuffer, *lpnSize);

    rc = res > 0;

  }

  free(lpABuffer);

  return rc;

}

#endif

#if defined(_UWP)

DWORD GetTickCount(void)

{

  return (DWORD)GetTickCount64();

}

#endif

#if (!defined(_WIN32)) || (defined(_WIN32) && (_WIN32_WINNT < 0x0600))

ULONGLONG winpr_GetTickCount64(void)

{

  const UINT64 ns = winpr_GetTickCount64NS();

  return WINPR_TIME_NS_TO_MS(ns);

}

#endif

UINT64 winpr_GetTickCount64NS(void)

{

  UINT64 ticks = 0;

#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 199309L)

  struct timespec ts = { 0 };

  if (clock_gettime(CLOCK_MONOTONIC_RAW, &ts) == 0)

    ticks = (WINPR_ASSERTING_INT_CAST(uint64_t, ts.tv_sec) * 1000000000ull) +

            WINPR_ASSERTING_INT_CAST(uint64_t, ts.tv_nsec);

#elif defined(__MACH__) && defined(__APPLE__)

  ticks = mac_get_time_ns();

#elif defined(_WIN32)

  LARGE_INTEGER li = { 0 };

  LARGE_INTEGER freq = { 0 };

  if (QueryPerformanceFrequency(&freq) && QueryPerformanceCounter(&li))

    ticks = li.QuadPart * 1000000000ull / freq.QuadPart;

#else

  struct timeval tv = { 0 };

  if (gettimeofday(&tv, NULL) == 0)

    ticks = (tv.tv_sec * 1000000000ull) + (tv.tv_usec * 1000ull);

  /* We need to trick here:

   * this function should return the system uptime, but we need higher resolution.

   * so on first call get the actual timestamp along with the system uptime.

   *

   * return the uptime measured from now on (e.g. current measure - first measure + uptime at

   * first measure)

   */

  static UINT64 first = 0;

  static UINT64 uptime = 0;

  if (first == 0)

  {

    struct sysinfo info = { 0 };

    if (sysinfo(&info) == 0)

    {

      first = ticks;

      uptime = 1000000000ull * info.uptime;

    }

  }

  ticks = ticks - first + uptime;

#endif

  return ticks;

}

UINT64 winpr_GetUnixTimeNS(void)

{

#if defined(_WIN32)

  union

  {

    UINT64 u64;

    FILETIME ft;

  } t = { 0 };

  GetSystemTimeAsFileTime(&t.ft);

  return (t.u64 - FILETIME_TO_UNIX_OFFSET_S * 10000000ull) * 100ull;

#elif defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 199309L)

  struct timespec ts = { 0 };

  if (clock_gettime(CLOCK_REALTIME, &ts) != 0)

    return 0;

  return WINPR_ASSERTING_INT_CAST(uint64_t, ts.tv_sec) * 1000000000ull +

         WINPR_ASSERTING_INT_CAST(uint64_t, ts.tv_nsec);

#else

  struct timeval tv = { 0 };

  if (gettimeofday(&tv, NULL) != 0)

    return 0;

  return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000ull;

#endif

}

/* If x86 */

#ifdef _M_IX86_AMD64

#if defined(__GNUC__)

#define xgetbv(_func_, _lo_, _hi_) \

  __asm__ __volatile__("xgetbv" : "=a"(_lo_), "=d"(_hi_) : "c"(_func_))

#elif defined(_MSC_VER)

#define xgetbv(_func_, _lo_, _hi_)              \

  {                                           \

    unsigned __int64 val = _xgetbv(_func_); \

    _lo_ = val & 0xFFFFFFFF;                \

    _hi_ = (val >> 32);                     \

  }

#endif

#define B_BIT_AVX2 (1 << 5)

#define B_BIT_AVX512F (1 << 16)

#define D_BIT_MMX (1 << 23)

#define D_BIT_SSE (1 << 25)

#define D_BIT_SSE2 (1 << 26)

#define D_BIT_3DN (1 << 30)

// #define C_BIT_SSE3 (1 << 0)

#define C_BIT_PCLMULQDQ (1 << 1)

#define C81_BIT_LZCNT (1 << 5)

// #define C_BIT_3DNP (1 << 8)

#define C_BIT_3DNP (1 << 8)

#define C_BIT_SSSE3 (1 << 9)

#define C_BIT_SSE41 (1 << 19)

#define C_BIT_SSE42 (1 << 20)

#define C_BIT_FMA (1 << 12)

#define C_BIT_AES (1 << 25)

#define C_BIT_XGETBV (1 << 27)

#define C_BIT_AVX (1 << 28)

#define E_BIT_XMM (1 << 1)

#define E_BIT_YMM (1 << 2)

#define E_BITS_AVX (E_BIT_XMM | E_BIT_YMM)

static void cpuid(unsigned info, unsigned* eax, unsigned* ebx, unsigned* ecx, unsigned* edx)

{

#ifdef __GNUC__

  *eax = *ebx = *ecx = *edx = 0;

  __asm volatile(

  /* The EBX (or RBX register on x86_64) is used for the PIC base address

   * and must not be corrupted by our inline assembly.

   */

#ifdef _M_IX86

      "mov %%ebx, %%esi;"

      "cpuid;"

      "xchg %%ebx, %%esi;"

#else

      "mov %%rbx, %%rsi;"

      "cpuid;"

      "xchg %%rbx, %%rsi;"

#endif

      : "=a"(*eax), "=S"(*ebx), "=c"(*ecx), "=d"(*edx)

      : "a"(info), "c"(0));

#elif defined(_MSC_VER)

  int a[4];

  __cpuid(a, info);

  *eax = a[0];

  *ebx = a[1];

  *ecx = a[2];

  *edx = a[3];

#endif

}

#elif defined(_M_ARM) || defined(_M_ARM64)

#if defined(__linux__)

// HWCAP flags from linux kernel - uapi/asm/hwcap.h

#define HWCAP_SWP (1 << 0)

#define HWCAP_HALF (1 << 1)

#define HWCAP_THUMB (1 << 2)

#define HWCAP_26BIT (1 << 3) /* Play it safe */

#define HWCAP_FAST_MULT (1 << 4)

#define HWCAP_FPA (1 << 5)

#define HWCAP_VFP (1 << 6)

#define HWCAP_EDSP (1 << 7)

#define HWCAP_JAVA (1 << 8)

#define HWCAP_IWMMXT (1 << 9)

#define HWCAP_CRUNCH (1 << 10)

#define HWCAP_THUMBEE (1 << 11)

#define HWCAP_NEON (1 << 12)

#define HWCAP_VFPv3 (1 << 13)

#define HWCAP_VFPv3D16 (1 << 14) /* also set for VFPv4-D16 */

#define HWCAP_TLS (1 << 15)

#define HWCAP_VFPv4 (1 << 16)

#define HWCAP_IDIVA (1 << 17)

#define HWCAP_IDIVT (1 << 18)

#define HWCAP_VFPD32 (1 << 19) /* set if VFP has 32 regs (not 16) */

#define HWCAP_IDIV (HWCAP_IDIVA | HWCAP_IDIVT)

// From linux kernel uapi/linux/auxvec.h

#define AT_HWCAP 16

static unsigned GetARMCPUCaps(void)

{

  unsigned caps = 0;

  int fd = open("/proc/self/auxv", O_RDONLY);

  if (fd == -1)

    return 0;

  static struct

  {

    unsigned a_type; /* Entry type */

    unsigned a_val;  /* Integer value */

  } auxvec;

  while (1)

  {

    int num;

    num = read(fd, (char*)&auxvec, sizeof(auxvec));

    if (num < 1 || (auxvec.a_type == 0 && auxvec.a_val == 0))

      break;

    if (auxvec.a_type == AT_HWCAP)

    {

      caps = auxvec.a_val;

    }

  }

  close(fd);

  return caps;

}

#endif // defined(__linux__)

#endif // _M_IX86_AMD64

#ifndef _WIN32

#if defined(_M_ARM) || defined(_M_ARM64)

#ifdef __linux__

#include <sys/auxv.h>

#endif

#endif

BOOL IsProcessorFeaturePresent(DWORD ProcessorFeature)

{

  BOOL ret = FALSE;

#if defined(ANDROID)

  const uint64_t features = android_getCpuFeatures();

  const AndroidCpuFamily family = android_getCpuFamily();

  const BOOL isArm = (family == ANDROID_CPU_FAMILY_ARM) || (family == ANDROID_CPU_FAMILY_ARM64);

  const BOOL isX86 = (family == ANDROID_CPU_FAMILY_X86) || (family == ANDROID_CPU_FAMILY_X86_64);

  if (isX86)

  {

    switch (ProcessorFeature)

    {

      case PF_MMX_INSTRUCTIONS_AVAILABLE:

      case PF_XMMI_INSTRUCTIONS_AVAILABLE:

      case PF_XMMI64_INSTRUCTIONS_AVAILABLE:

      case PF_3DNOW_INSTRUCTIONS_AVAILABLE:

      case PF_SSE3_INSTRUCTIONS_AVAILABLE:

        return TRUE;

      case PF_SSSE3_INSTRUCTIONS_AVAILABLE:

        return features & ANDROID_CPU_X86_FEATURE_SSSE3;

      case PF_SSE4_1_INSTRUCTIONS_AVAILABLE:

        return features & ANDROID_CPU_X86_FEATURE_SSE4_1;

      case PF_SSE4_2_INSTRUCTIONS_AVAILABLE:

        return features & ANDROID_CPU_X86_FEATURE_SSE4_2;

      case PF_AVX_INSTRUCTIONS_AVAILABLE:

        return features & ANDROID_CPU_X86_FEATURE_AVX;

      case PF_AVX2_INSTRUCTIONS_AVAILABLE:

        return features & ANDROID_CPU_X86_FEATURE_AVX2;

      case PF_AVX512F_INSTRUCTIONS_AVAILABLE:

      default:

        WLog_WARN(TAG, "feature 0x%08" PRIx32 " check not implemented", ProcessorFeature);

        return FALSE;

    }

  }

  if (isArm)

  {

    switch (ProcessorFeature)

    {

      case PF_ARM_NEON_INSTRUCTIONS_AVAILABLE:

      case PF_ARM_NEON:

        return features & ANDROID_CPU_ARM_FEATURE_NEON;

      default:

        WLog_WARN(TAG, "feature 0x%08" PRIx32 " check not implemented", ProcessorFeature);

        return FALSE;

    }

  }

  WLog_WARN(TAG, "Unsupported Android CPU family 0x%08" PRIx32, family);

  return FALSE;

#elif defined(_M_ARM) || defined(_M_ARM64)

#ifdef __linux__

  const unsigned long caps = getauxval(AT_HWCAP);

  switch (ProcessorFeature)

  {

    case PF_ARM_NEON_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_NEON:

      if (caps & HWCAP_NEON)

        ret = TRUE;

      break;

    case PF_ARM_THUMB:

      if (caps & HWCAP_THUMB)

        ret = TRUE;

    case PF_ARM_VFP_32_REGISTERS_AVAILABLE:

      if (caps & HWCAP_VFPD32)

        ret = TRUE;

    case PF_ARM_DIVIDE_INSTRUCTION_AVAILABLE:

      if ((caps & HWCAP_IDIVA) || (caps & HWCAP_IDIVT))

        ret = TRUE;

    case PF_ARM_VFP3:

      if (caps & HWCAP_VFPv3)

        ret = TRUE;

      break;

    case PF_ARM_JAZELLE:

      if (caps & HWCAP_JAVA)

        ret = TRUE;

      break;

    case PF_ARM_DSP:

      if (caps & HWCAP_EDSP)

        ret = TRUE;

      break;

    case PF_ARM_MPU:

      if (caps & HWCAP_EDSP)

        ret = TRUE;

      break;

    case PF_ARM_THUMB2:

      if ((caps & HWCAP_IDIVT) || (caps & HWCAP_VFPv4))

        ret = TRUE;

      break;

    case PF_ARM_T2EE:

      if (caps & HWCAP_THUMBEE)

        ret = TRUE;

      break;

    case PF_ARM_INTEL_WMMX:

      if (caps & HWCAP_IWMMXT)

        ret = TRUE;

      break;

    case PF_MMX_INSTRUCTIONS_AVAILABLE:

    case PF_XMMI_INSTRUCTIONS_AVAILABLE:

    case PF_XMMI64_INSTRUCTIONS_AVAILABLE:

    case PF_3DNOW_INSTRUCTIONS_AVAILABLE:

    case PF_SSE3_INSTRUCTIONS_AVAILABLE:

    case PF_SSSE3_INSTRUCTIONS_AVAILABLE:

    case PF_SSE4_1_INSTRUCTIONS_AVAILABLE:

    case PF_SSE4_2_INSTRUCTIONS_AVAILABLE:

    case PF_AVX_INSTRUCTIONS_AVAILABLE:

    case PF_AVX2_INSTRUCTIONS_AVAILABLE:

    case PF_AVX512F_INSTRUCTIONS_AVAILABLE:

      ret = FALSE;

      break;

    case PF_ARM_V8_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V83_LRCPC_INSTRUCTIONS_AVAILABLE:

    default:

      WLog_WARN(TAG, "feature 0x%08" PRIx32 " check not implemented", ProcessorFeature);

      break;

  }

#else // __linux__

  switch (ProcessorFeature)

  {

    case PF_MMX_INSTRUCTIONS_AVAILABLE:

    case PF_XMMI_INSTRUCTIONS_AVAILABLE:

    case PF_XMMI64_INSTRUCTIONS_AVAILABLE:

    case PF_3DNOW_INSTRUCTIONS_AVAILABLE:

    case PF_SSE3_INSTRUCTIONS_AVAILABLE:

    case PF_SSSE3_INSTRUCTIONS_AVAILABLE:

    case PF_SSE4_1_INSTRUCTIONS_AVAILABLE:

    case PF_SSE4_2_INSTRUCTIONS_AVAILABLE:

    case PF_AVX_INSTRUCTIONS_AVAILABLE:

    case PF_AVX2_INSTRUCTIONS_AVAILABLE:

    case PF_AVX512F_INSTRUCTIONS_AVAILABLE:

      ret = FALSE;

      break;

    case PF_ARM_NEON_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_NEON:

#ifdef __ARM_NEON

      ret = TRUE;

#endif

      break;

    case PF_ARM_V8_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE:

    case PF_ARM_V83_LRCPC_INSTRUCTIONS_AVAILABLE:

    default:

      WLog_WARN(TAG, "feature 0x%08" PRIx32 " check not implemented", ProcessorFeature);

      break;

  }

#endif // __linux__

#endif

#if defined(_M_IX86_AMD64)

#ifdef __GNUC__

  unsigned a = 0;

  unsigned b = 0;

  unsigned c = 0;

  unsigned d = 0;

  cpuid(1, &a, &b, &c, &d);

  switch (ProcessorFeature)

  {

    case PF_MMX_INSTRUCTIONS_AVAILABLE:

      if (d & D_BIT_MMX)

        ret = TRUE;

      break;

    case PF_XMMI_INSTRUCTIONS_AVAILABLE:

      if (d & D_BIT_SSE)

        ret = TRUE;

      break;

    case PF_XMMI64_INSTRUCTIONS_AVAILABLE:

      if (d & D_BIT_SSE2)

        ret = TRUE;

      break;

    case PF_3DNOW_INSTRUCTIONS_AVAILABLE:

      if (d & D_BIT_3DN)

        ret = TRUE;

      break;

    case PF_SSE3_INSTRUCTIONS_AVAILABLE:

      ret = __builtin_cpu_supports("sse3");

      break;

    case PF_SSSE3_INSTRUCTIONS_AVAILABLE:

      ret = __builtin_cpu_supports("ssse3");