interrogate_datafile.I

Go to the documentation of this file.

/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file interrogate_datafile.I
 * @author drose
 * @date 2000-08-09
 */

/**
 * Writes the indicated vector to the output file.  Each component is written
 * using its normal ostream output operator.
 */
template<class Element>
void
idf_output_vector(std::ostream &out, const std::vector<Element> &vec) {
  out << vec.size() << " ";
  typename std::vector<Element>::const_iterator vi;
  for (vi = vec.begin(); vi != vec.end(); ++vi) {
    out << (*vi) << " ";
  }
}


/**
 * Reads the given vector from the input file, as previously written by
 * output_string().  Each component is read using its normal istream input
 * operator.
 */
template<class Element>
void
idf_input_vector(std::istream &in, std::vector<Element> &vec) {
  int length;
  in >> length;
  if (in.fail()) {
    return;
  }

  vec.clear();
  vec.reserve(length);
  while (length > 0) {
    Element elem;
    in >> elem;
    vec.push_back(elem);
    length--;
  }
}