split env

1 files changed, 106 insertions, 0 deletions

diff --git a/src/envwindows.h b/src/envwindows.h
new file mode 100644
index 00000000..c23f99f4
--- /dev/null
+++ b/src/envwindows.h
@@ -0,0 +1,106 @@
+#include <QString>
+#include <optional>
+
+namespace env
+{
+
+// a variety of information on windows
+//
+class WindowsInfo
+{
+public:
+  struct Version
+  {
+    DWORD major=0, minor=0, build=0;
+
+    QString toString() const
+    {
+      return QString("%1.%2.%3").arg(major).arg(minor).arg(build);
+    }
+
+    friend bool operator==(const Version& a, const Version& b)
+    {
+      return
+        a.major == b.major &&
+        a.minor == b.minor &&
+        a.build == b.build;
+    }
+
+    friend bool operator!=(const Version& a, const Version& b)
+    {
+      return !(a == b);
+    }
+  };
+
+  struct Release
+  {
+    // the BuildLab entry from the registry, may be empty
+    QString buildLab;
+
+    // product name such as "Windows 10 Pro", may not be in English, may be
+    // empty
+    QString productName;
+
+    // release ID such as 1809, may be mepty
+    QString ID;
+
+    // some sub-build number, undocumented, may be empty
+    DWORD UBR;
+
+    Release()
+      : UBR(0)
+    {
+    }
+  };
+
+
+  WindowsInfo();
+
+  // tries to guess whether this process is running in compatibility mode
+  //
+  bool compatibilityMode() const;
+
+  // returns the Windows version, may not correspond to the actual version
+  // if the process is running in compatibility mode
+  //
+  const Version& reportedVersion() const;
+
+  // tries to guess the real Windows version that's running, can be empty
+  //
+  const Version& realVersion() const;
+
+  // various information about the current release
+  //
+  const Release& release() const;
+
+  // whether this process is running as administrator, may be empty if the
+  // information is not available
+  std::optional<bool> isElevated() const;
+
+  // returns a string with all the above information on one line
+  //
+  QString toString() const;
+
+private:
+  Version m_reported, m_real;
+  Release m_release;
+  std::optional<bool> m_elevated;
+
+  // uses RtlGetVersion() to get the version number as reported by Windows
+  //
+  Version getReportedVersion(HINSTANCE ntdll) const;
+
+  // uses RtlGetNtVersionNumbers() to get the real version number
+  //
+  Version getRealVersion(HINSTANCE ntdll) const;
+
+  // gets various information from the registry
+  //
+  Release getRelease() const;
+
+  // gets whether the process is elevated
+  //
+  std::optional<bool> getElevated() const;
+};
+
+} // namespace