VS: Factor out helper to compute ApplicationTypeRevision

This is the first two components of `CMAKE_SYSTEM_VERSION`.

1 files changed, 9 insertions, 0 deletions

diff --git a/Source/cmGlobalVisualStudio10Generator.cxx b/Source/cmGlobalVisualStudio10Generator.cxx
index 4fa89d0dc9..6a78d0b8be 100644
--- a/Source/cmGlobalVisualStudio10Generator.cxx
+++ b/Source/cmGlobalVisualStudio10Generator.cxx
@@ -1112,6 +1112,15 @@ std::string cmGlobalVisualStudio10Generator::GetInstalledNsightTegraVersion()
   return version;
 }
 
+std::string cmGlobalVisualStudio10Generator::GetApplicationTypeRevision() const
+{
+  // Return the first two '.'-separated components of the Windows version.
+  std::string::size_type end1 = this->SystemVersion.find('.');
+  std::string::size_type end2 =
+    end1 == std::string::npos ? end1 : this->SystemVersion.find('.', end1 + 1);
+  return this->SystemVersion.substr(0, end2);
+}
+
 static std::string cmLoadFlagTableString(Json::Value entry, const char* field)
 {
   if (entry.isMember(field)) {