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// file : examples/performance/expat.cxx
// license : not copyrighted - public domain
#include <iostream>
#include <fstream>
#include <expat.h>
#include "time.hxx"
using namespace std;
const unsigned long iterations = 1000;
unsigned long start_count;
unsigned long end_count;
void XMLCALL
start_element (void* data, const XML_Char* ns_name, const XML_Char** atts)
{
start_count++;
}
void XMLCALL
end_element (void* data, const XML_Char* ns_name)
{
end_count++;
}
void XMLCALL
characters (void* data, const XML_Char* s, int n)
{
}
int
main (int argc, char* argv[])
{
if (argc != 2)
{
cerr << "usage: " << argv[0] << " <xml-file>" << endl;
return 1;
}
try
{
ifstream ifs;
ifs.exceptions (ios_base::failbit);
ifs.open (argv[1], ios::in | ios::ate);
size_t size (ifs.tellg ());
ifs.seekg (0, ios::beg);
char* buf = new char[size];
ifs.read (buf, size);
cerr << " document size: " << size << " bytes" << endl;
// Warmup.
//
bool failed (false);
for (unsigned long i (0); !failed && i < 10; ++i)
{
start_count = 0;
end_count = 0;
XML_Parser p (XML_ParserCreateNS (0, ' '));
XML_SetStartElementHandler (p, start_element);
XML_SetEndElementHandler (p, end_element);
XML_SetCharacterDataHandler (p, characters);
XML_Parse (p, buf, size, 1);
XML_ParserFree (p);
if (start_count != end_count)
failed = true;
}
if (failed)
{
cerr << "failed" << endl;
return 1;
}
cerr << " elements: " << start_count << endl;
os::time start;
for (unsigned long i (0); !failed && i < 1000; ++i)
{
start_count = 0;
end_count = 0;
XML_Parser p (XML_ParserCreateNS (0, ' '));
XML_SetStartElementHandler (p, start_element);
XML_SetEndElementHandler (p, end_element);
XML_SetCharacterDataHandler (p, characters);
XML_Parse (p, buf, size, 1);
XML_ParserFree (p);
if (start_count != end_count)
failed = true;
}
os::time end;
delete[] buf;
if (failed)
{
cerr << "failed" << endl;
return 1;
}
os::time time (end - start);
double ms (time.sec () * 1000000ULL + time.nsec () / 1000ULL);
cerr << " time: " << time << " sec" << endl;
// Calculate throughput in documents/sec.
//
double tpd ((iterations / ms) * 1000000);
cerr << " throughput: " << tpd << " documents/sec" << endl;
// Calculate throughput in MBytes/sec.
//
double tpb (((size * iterations) / ms) * 1000000/(1024*1024));
cerr << " throughput: " << tpb << " MBytes/sec" << endl;
}
catch (ios_base::failure const&)
{
cerr << "io failure" << endl;
return 1;
}
}
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