JRedirectStream.cc

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#include <string>
#include <iostream>
#include <sstream>
#include <iomanip>

#include "JLang/JRedirectStream.hh"
#include "JLang/JNullStream.hh"

#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"


/**
 * \file
 *
 * Example program to test JLANG::JRedirectStream class.
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;

  int         debug;

  try {

    JParser<> zap("Example program to test redirection of I/O streams.");

    zap['d'] = make_field(debug)   =  3;

    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }


  using namespace JPP;

  string message = "hello world";

  NOTICE("debug = " << debug << endl);

  ostringstream os;

  {
    NOTICE("The message <" << message << "> is re-directed to <null> if debug < " << JEEP::debug_t << endl);

    JRedirectStream redirect(cout, (debug >= JEEP::debug_t) ? static_cast<ostream&>(os) : null);

    cout << message << flush;
  }

  NOTICE("result <" << os.str() << ">" << endl);

  ASSERT(debug >= JEEP::debug_t ? os.str() == message : os.str() == "");

  istringstream is;

  {
    NOTICE("The following input message is re-directed to <null> if debug < " << JEEP::debug_t << endl);

    JRedirectStream redirect(cin, (debug >= JEEP::debug_t) ? static_cast<istream&>(is) : null);

    getline(cin, message);
    
    DEBUG("message <" << message << ">" << endl);
  }

  NOTICE("result <" << is.str() << ">" << endl);

  ASSERT(debug >= JEEP::debug_t ? is.str() == message : is.str() == "");

  return 0;
}