1 files changed, 111 insertions, 0 deletions
diff --git a/src/src/envwindows.h b/src/src/envwindows.h
new file mode 100644
index 0000000..938bf3f
--- /dev/null
+++ b/src/src/envwindows.h
@@ -0,0 +1,111 @@
+#ifndef ENV_WINDOWS_H
+#define ENV_WINDOWS_H
+
+#include <QString>
+#include <optional>
+
+namespace env
+{
+
+// a variety of information on the operating system
+//
+class WindowsInfo
+{
+public:
+  struct Version
+  {
+#ifdef _WIN32
+    DWORD major = 0, minor = 0, build = 0;
+#else
+    uint32_t major = 0, minor = 0, build = 0;
+#endif
+
+    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 (Windows) or distro name (Linux),
+    // may be empty
+    QString buildLab;
+
+    // release ID such as 1809 (Windows) or VERSION_ID (Linux), may be empty
+    QString ID;
+
+    // some sub-build number, may be empty
+#ifdef _WIN32
+    DWORD UBR;
+#else
+    uint32_t UBR;
+#endif
+
+    Release() : UBR(0) {}
+  };
+
+  WindowsInfo();
+
+  // tries to guess whether this process is running in compatibility mode
+  //
+  bool compatibilityMode() const;
+
+  // returns the OS version
+  //
+  const Version& reportedVersion() const;
+
+  // tries to guess the real version, can be empty
+  //
+  const Version& realVersion() const;
+
+  // various information about the current release
+  //
+  const Release& release() const;
+
+  // whether this process is running as administrator/root, 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;
+
+#ifdef _WIN32
+  // 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;
+#else
+  // uses uname() to get the kernel version
+  //
+  Version getKernelVersion() const;
+#endif
+
+  // gets various information from the registry (Windows) or /etc/os-release (Linux)
+  //
+  Release getRelease() const;
+
+  // gets whether the process is elevated
+  //
+  std::optional<bool> getElevated() const;
+};
+
+}  // namespace env
+
+#endif  // ENV_WINDOWS_H