From 5e527213a2430bb3018e5eebd909aef294edf9b5 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Fri, 18 Dec 2020 18:48:46 +0300
Subject: Switch to build2

---
 xsd-examples/cxx/tree/performance/parsing.cxx | 172 ++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 xsd-examples/cxx/tree/performance/parsing.cxx

(limited to 'xsd-examples/cxx/tree/performance/parsing.cxx')

diff --git a/xsd-examples/cxx/tree/performance/parsing.cxx b/xsd-examples/cxx/tree/performance/parsing.cxx
new file mode 100644
index 0000000..c41b57d
--- /dev/null
+++ b/xsd-examples/cxx/tree/performance/parsing.cxx
@@ -0,0 +1,172 @@
+// file      : cxx/tree/performance/parsing.cxx
+// copyright : not copyrighted - public domain
+
+#include <memory>  // std::unique_ptr
+#include <cstddef> // std::size_t
+#include <fstream>
+#include <iostream>
+
+#include <xercesc/dom/DOM.hpp>
+#include <xercesc/dom/DOMLSParser.hpp>
+#include <xercesc/dom/DOMImplementation.hpp>
+#include <xercesc/dom/DOMImplementationRegistry.hpp>
+
+#include <xercesc/validators/common/Grammar.hpp>
+
+#include <xercesc/framework/MemBufInputSource.hpp>
+#include <xercesc/framework/Wrapper4InputSource.hpp>
+
+#include <xercesc/util/XMLUniDefs.hpp>
+
+#include <xsd/cxx/xml/dom/bits/error-handler-proxy.hxx>
+#include <xsd/cxx/tree/error-handler.hxx>
+
+#include "time.hxx"
+#include "test.hxx"
+
+using namespace std;
+
+bool
+parsing (const char* file, unsigned long iter, bool validate)
+{
+  try
+  {
+    cerr << "parsing:" << endl;
+
+    ifstream ifs;
+    ifs.exceptions (ios_base::failbit);
+    ifs.open (file, ios::in | ios::ate);
+
+    size_t size (ifs.tellg ());
+    ifs.seekg (0, ios::beg);
+
+    char* buf = new char[size];
+    ifs.read (buf, size);
+    ifs.close ();
+
+    cerr << "  document size:  " << size << " bytes" << endl
+         << "  iterations:     " << iter << endl;
+
+    // Create XML parser that we are going to use in all iterations.
+    //
+    using namespace xercesc;
+
+    const XMLCh ls_id[] =
+      {xercesc::chLatin_L, xercesc::chLatin_S, xercesc::chNull};
+
+    DOMImplementation* impl (
+      DOMImplementationRegistry::getDOMImplementation (ls_id));
+
+    // Use the error handler implementation provided by the XSD runtime.
+    //
+    xsd::cxx::tree::error_handler<char> eh;
+    xsd::cxx::xml::dom::bits::error_handler_proxy<char> ehp (eh);
+
+    xml_schema::dom::unique_ptr<DOMLSParser> parser (
+      impl->createLSParser (DOMImplementationLS::MODE_SYNCHRONOUS, 0));
+
+    DOMConfiguration* conf (parser->getDomConfig ());
+
+    conf->setParameter (XMLUni::fgDOMComments, false);
+    conf->setParameter (XMLUni::fgDOMDatatypeNormalization, true);
+    conf->setParameter (XMLUni::fgDOMEntities, false);
+    conf->setParameter (XMLUni::fgDOMNamespaces, true);
+    conf->setParameter (XMLUni::fgDOMElementContentWhitespace, false);
+
+    // Set error handler.
+    //
+    conf->setParameter (XMLUni::fgDOMErrorHandler, &ehp);
+
+    if (validate)
+    {
+      conf->setParameter (XMLUni::fgDOMValidate, true);
+      conf->setParameter (XMLUni::fgXercesSchema, true);
+      conf->setParameter (XMLUni::fgXercesSchemaFullChecking, false);
+
+      // Xerces-C++ 3.1.0 is the first version with working multi import
+      // support.
+      //
+#if _XERCES_VERSION >= 30100
+      conf->setParameter (XMLUni::fgXercesHandleMultipleImports, true);
+#endif
+
+      // If we are validating, pre-load and cache the schema.
+      //
+      if (!parser->loadGrammar ("test.xsd", Grammar::SchemaGrammarType, true))
+      {
+        // In Xerces-C++ grammar loading failure results in just a warning.
+        // Make it a fatal error.
+        //
+        eh.handle ("test.xsd", 0, 0,
+                   xsd::cxx::tree::error_handler<char>::severity::fatal,
+                   "unable to load schema");
+      }
+
+      eh.throw_if_failed<xml_schema::parsing> ();
+      conf->setParameter (XMLUni::fgXercesUseCachedGrammarInParse, true);
+      conf->setParameter (XMLUni::fgXercesLoadSchema, false);
+    }
+    else
+    {
+      conf->setParameter (XMLUni::fgDOMValidate, false);
+      conf->setParameter (XMLUni::fgXercesSchema, false);
+      conf->setParameter (XMLUni::fgXercesSchemaFullChecking, false);
+    }
+
+    conf->setParameter (XMLUni::fgXercesUserAdoptsDOMDocument, true);
+
+    // Create memory buffer input source.
+    //
+    MemBufInputSource is (
+      reinterpret_cast<XMLByte*> (buf), size, file, false);
+    is.setCopyBufToStream (false);
+    Wrapper4InputSource wis (&is, false);
+
+    // Parsing loop.
+    //
+    os::time start;
+
+    for (unsigned long i (0); i < iter; ++i)
+    {
+      // First parse XML to DOM reusing the parser we created above.
+      //
+      xml_schema::dom::unique_ptr<DOMDocument> doc (parser->parse (&wis));
+      eh.throw_if_failed<xml_schema::parsing> ();
+
+      // Then parse DOM to the object model.
+      //
+      unique_ptr<test::root> r (test::root_ (*doc));
+    }
+
+    os::time end;
+    os::time time (end - start);
+
+    delete[] buf;
+
+    cerr << "  time:           " << time << " sec" << endl;
+
+    double ms (time.sec () * 1000000ULL + time.nsec () / 1000ULL);
+
+    // Calculate throughput in documents/sec.
+    //
+    double tpd ((iter / ms) * 1000000);
+    cerr << "  throughput:     " << tpd << " documents/sec" << endl;
+
+    // Calculate throughput in MBytes/sec.
+    //
+    double tpb (((size * iter) / ms) * 1000000/(1024*1024));
+    cerr << "  throughput:     " << tpb << " MBytes/sec" << endl;
+  }
+  catch (const xml_schema::exception& e)
+  {
+    cerr << e << endl;
+    return false;
+  }
+  catch (std::ios_base::failure const&)
+  {
+    cerr << "io failure" << endl;
+    return false;
+  }
+
+  return true;
+}
-- 
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