1 files changed, 72 insertions, 0 deletions
diff --git a/base/win/windows_version.cc b/base/win/windows_version.cc
new file mode 100644
index 0000000..a80688c
--- /dev/null
+++ b/base/win/windows_version.cc
@@ -0,0 +1,72 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/win/windows_version.h"
+
+#include <windows.h>
+
+#include "base/logging.h"
+
+namespace base {
+namespace win {
+
+Version GetVersion() {
+  static bool checked_version = false;
+  static Version win_version = VERSION_PRE_2000;
+  if (!checked_version) {
+    OSVERSIONINFOEX version_info;
+    version_info.dwOSVersionInfoSize = sizeof version_info;
+    GetVersionEx(reinterpret_cast<OSVERSIONINFO*>(&version_info));
+    if (version_info.dwMajorVersion == 5) {
+      switch (version_info.dwMinorVersion) {
+        case 0:
+          win_version = VERSION_2000;
+          break;
+        case 1:
+          win_version = VERSION_XP;
+          break;
+        case 2:
+        default:
+          win_version = VERSION_SERVER_2003;
+          break;
+      }
+    } else if (version_info.dwMajorVersion == 6) {
+      if (version_info.wProductType != VER_NT_WORKSTATION) {
+        // 2008 is 6.0, and 2008 R2 is 6.1.
+        win_version = VERSION_2008;
+      } else {
+        if (version_info.dwMinorVersion == 0) {
+          win_version = VERSION_VISTA;
+        } else {
+          win_version = VERSION_WIN7;
+        }
+      }
+    } else if (version_info.dwMajorVersion > 6) {
+      win_version = VERSION_WIN7;
+    }
+    checked_version = true;
+  }
+  return win_version;
+}
+
+void GetServicePackLevel(int* major, int* minor) {
+  DCHECK(major && minor);
+  static bool checked_version = false;
+  static int service_pack_major = -1;
+  static int service_pack_minor = -1;
+  if (!checked_version) {
+    OSVERSIONINFOEX version_info = {0};
+    version_info.dwOSVersionInfoSize = sizeof(version_info);
+    GetVersionEx(reinterpret_cast<OSVERSIONINFOW*>(&version_info));
+    service_pack_major = version_info.wServicePackMajor;
+    service_pack_minor = version_info.wServicePackMinor;
+    checked_version = true;
+  }
+
+  *major = service_pack_major;
+  *minor = service_pack_minor;
+}
+
+}  // namespace win
+}  // namespace base