2020-01-02 12:44:51 +00:00
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#include "stdafx.h"
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#include "WindowsVersion.h"
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namespace MWR::Loader
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{
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WinVersion g_WinVer;
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namespace
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{
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static bool versionInitialized = false;
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void InitVersion()
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{
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if (versionInitialized)
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return;
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g_WinVer.native.dwOSVersionInfoSize = sizeof(g_WinVer.native);
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using fnRtlGetVersion = NTSTATUS(NTAPI*)(PRTL_OSVERSIONINFOEXW lpVersionInformation);
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auto RtlGetVersion = (fnRtlGetVersion)GetProcAddress(GetModuleHandleW(L"ntdll.dll"), "RtlGetVersion");
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if (RtlGetVersion)
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{
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RtlGetVersion(&g_WinVer.native);
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}
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if (g_WinVer.native.dwMajorVersion != 0)
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{
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auto fullver = (g_WinVer.native.dwMajorVersion << 8) | g_WinVer.native.dwMinorVersion;
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switch (fullver)
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{
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2020-01-13 14:09:48 +00:00
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case Win32WinNtWIN10:
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2020-01-02 12:44:51 +00:00
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if (g_WinVer.native.dwBuildNumber >= Build_RS6)
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g_WinVer.ver = Win10_RS6;
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else if (g_WinVer.native.dwBuildNumber >= Build_RS5)
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g_WinVer.ver = Win10_RS5;
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else if (g_WinVer.native.dwBuildNumber >= Build_RS4)
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g_WinVer.ver = Win10_RS4;
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else if (g_WinVer.native.dwBuildNumber >= Build_RS3)
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g_WinVer.ver = Win10_RS3;
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else if (g_WinVer.native.dwBuildNumber >= Build_RS2)
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g_WinVer.ver = Win10_RS2;
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else if (g_WinVer.native.dwBuildNumber >= Build_RS1)
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g_WinVer.ver = Win10_RS1;
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else if (g_WinVer.native.dwBuildNumber >= Build_RS0)
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g_WinVer.ver = Win10;
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break;
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2020-01-13 14:09:48 +00:00
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case Win32WinNtWINBLUE:
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2020-01-02 12:44:51 +00:00
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g_WinVer.ver = Win8Point1;
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break;
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2020-01-13 14:09:48 +00:00
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case Win32WinNtWIN8:
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2020-01-02 12:44:51 +00:00
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g_WinVer.ver = Win8;
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break;
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2020-01-13 14:09:48 +00:00
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case Win32WinNtWIN7:
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2020-01-02 12:44:51 +00:00
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g_WinVer.ver = Win7;
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break;
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2020-01-13 14:09:48 +00:00
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case Win32WinNtWINXP:
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2020-01-02 12:44:51 +00:00
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g_WinVer.ver = WinXP;
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break;
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default:
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g_WinVer.ver = WinUnsupported;
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}
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}
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g_WinVer.revision = GetRevision();
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versionInitialized = true;
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}
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}
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WinVersion& WinVer()
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{
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InitVersion();
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return g_WinVer;
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}
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bool IsWindowsVersionOrGreater(WORD wMajorVersion, WORD wMinorVersion, WORD wServicePackMajor, DWORD dwBuild)
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{
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auto& g_WinVer = WinVer();
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if (g_WinVer.native.dwMajorVersion != 0)
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{
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if (g_WinVer.native.dwMajorVersion > wMajorVersion)
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return true;
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else if (g_WinVer.native.dwMajorVersion < wMajorVersion)
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return false;
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if (g_WinVer.native.dwMinorVersion > wMinorVersion)
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return true;
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else if (g_WinVer.native.dwMinorVersion < wMinorVersion)
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return false;
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if (g_WinVer.native.wServicePackMajor > wServicePackMajor)
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return true;
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else if (g_WinVer.native.wServicePackMajor < wServicePackMajor)
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return false;
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if (g_WinVer.native.dwBuildNumber >= dwBuild)
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return true;
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}
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return false;
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}
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}
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