global.hpp

Go to the documentation of this file.

#ifndef _GLOBAL_HPP
#define _GLOBAL_HPP

#include <assert.h>
#include <ios>
#include <iostream>
#include <cmath>
#include <cerrno>
#include <limits>

// Uses expensive testing code to check for bugs (very slow)
// #define SANITY_CHECK 

namespace Arak {

  enum Color {
    WHITE = 0,
    BLACK,
    INVALID_COLOR
  };

  static inline Color opposite(Color c) {
    switch (c) {
    case WHITE:
      return BLACK;
    case BLACK:
      return WHITE;
    default:
      assert(false);
    }
  }

  template<typename charT, typename traits>
  std::basic_istream<charT,traits>&
  skipline(std::basic_istream<charT,traits>& in) {
    charT c;
    while (in.get(c) && (c != '\n'))
      ;
    return in;
  }
  
  template<typename charT, typename traits>
  std::basic_istream<charT,traits>&
  skipcomments(std::basic_istream<charT,traits>& in) {
    while (true) {
      in >> std::ws; // strip leading whitespace
      if (in.peek() == '#')
  in >> skipline;
      else break;
    }
    return in;
  }

  inline double ln(double x) {
    assert(x >= 0.0);
    if (x == 0.0) 
      return -std::numeric_limits<double>::infinity();
    else 
      return std::log(x);
  }

} // End of namespace: Arak

#endif

---