cmCTestSVN: Add the new SVNInfo structure

It represents information of an SVN repository. It can be the base
repository or an external one.

Source/CTest/cmCTestSVN.cxx

@@ -448,3 +448,29 @@ void cmCTestSVN::WriteXMLGlobal(std::ostream& xml)
 
   xml << "\t<SVNPath>" << this->Base << "</SVNPath>\n";
 }
+
+//----------------------------------------------------------------------------
+std::string cmCTestSVN::SVNInfo::BuildLocalPath(std::string const& path) const
+{
+  std::string local_path;
+
+  // Add local path prefix if not empty
+  if (!this->LocalPath.empty())
+    {
+    local_path += this->LocalPath;
+    local_path += "/";
+    }
+
+  // Add path with base prefix removed
+  if(path.size() > this->Base.size() &&
+     strncmp(path.c_str(), this->Base.c_str(), this->Base.size()) == 0)
+    {
+    local_path += (path.c_str() + this->Base.size());
+    }
+  else
+    {
+    local_path += path;
+  }
+
+  return local_path;
+}

Source/CTest/cmCTestSVN.h

@@ -42,6 +42,31 @@ private:
   // Directory under repository root checked out in working tree.
   std::string Base;
 
+  // Information about an SVN repository (root repository or external)
+  struct SVNInfo {
+
+    SVNInfo(const char* path) : LocalPath(path) {}
+    // Remove base from the filename
+    std::string BuildLocalPath(std::string const& path) const;
+
+    // LocalPath relative to the main source directory.
+    std::string LocalPath;
+
+    // URL of repository directory checked out in the working tree.
+    std::string URL;
+
+    // URL of repository root directory.
+    std::string Root;
+
+    // Directory under repository root checked out in working tree.
+    std::string Base;
+
+    // Old and new repository revisions.
+    std::string OldRevision;
+    std::string NewRevision;
+
+  };
+
   std::string LoadInfo();
   void LoadModifications();
   void LoadRevisions();