basic_io_def.h

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/*
  This is basic_io_def.h

  Copyright (C) 2004,2005 Fokko du Cloux
  part of the Atlas of Lie Groups and Representations

  For license information see the LICENSE file
*/

#include <iostream>

/*****************************************************************************

        Chapter I -- Template functions defined in basic_io.h

******************************************************************************/

namespace atlas {


namespace basic_io {

/*
  This is a function for sequential output. It is assumed that I is an
  iterator type, pointing to a type for which the << operator is defined.
  Then we output the elements of the range [first,last[ as a list,
  with prefix pre, postfix post, and separator sep.
*/
template<typename I>
  std::ostream& seqPrint(std::ostream& strm, const I& first, const I& last,
             const char* sep, const char* pre, const char* post)
{
  strm << pre;
  bool firstElt = true;

  for (I i = first; i != last; ++i)
  {
    if (firstElt)
      firstElt = false;
    else
      strm << sep;
    strm << *i;
  }

  strm << post;

  return strm;
}

template <unsigned int n>
inline unsigned long long read_bytes(std::istream& in)
{
  return static_cast<unsigned char>(in.get())+(read_bytes<n-1>(in)<<8);
}

template<>
inline unsigned long long read_bytes<1>(std::istream& in)
{
  return static_cast<unsigned char>(in.get());
}

// binary output
template <unsigned int n>
inline void write_bytes(unsigned long long val, std::ostream& out)
{
  out.put(char(val&0xFF)); write_bytes<n-1>(val>>8,out);
}

template <>
inline void write_bytes<1>(unsigned long long val, std::ostream& out)
{
  out.put(char(val));
}

} // |namespace basic_io|

} // |namespace atlas|