ctest: support <CTestMeasurement> for runtime measurements

Teach CTest to parse output for <CTestMeasurement> in addition to
<DartMeasurement> for measurements defined at runtime.

Use a new class (cmCTestTestMeasurementXMLParser) derived from cmXMLParser
to parse the data and attributes these XML elements. This is an improvement
over our previous approach of using a series of regular expressions.

As part of this commit we also rename some member variables and methods
to make their purpose more clear.

DartStuff                        -> AllTestMeasurementsRegex
DartStuff1                       -> SingleTestMeasurementRegex
DartString                       -> TestMeasurementsOutput
GenerateDartOutput()             -> GenerateCTestXML()
GenerateRegressionImages()       -> RecordCustomTestMeasurements()
cmCTestRunTest::DartProcessing() -> ParseOutputForMeasurements()

1 files changed, 21 insertions, 0 deletions

diff --git a/Source/CTest/cmCTestTestMeasurementXMLParser.h b/Source/CTest/cmCTestTestMeasurementXMLParser.h
new file mode 100644
index 0000000..b2c3eb3
--- /dev/null
+++ b/Source/CTest/cmCTestTestMeasurementXMLParser.h
@@ -0,0 +1,21 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+
+#include <string>
+
+#include "cmXMLParser.h"
+
+class cmCTestTestMeasurementXMLParser : public cmXMLParser
+{
+public:
+  cmCTestTestMeasurementXMLParser() {}
+  std::string CharacterData;
+  std::string ElementName;
+  std::string MeasurementName;
+  std::string MeasurementType;
+
+protected:
+  void StartElement(const std::string& name, const char** atts) override;
+  void EndElement(const std::string& /*name*/) override {}
+  void CharacterDataHandler(const char* data, int length) override;
+};