iosize.h

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// ========================================================================= //
// This file is part of MyraMath, copyright (c) 2014-2019 by Ryan A Chilton  //
// and distributed by MyraCore, LLC. See LICENSE.txt for license terms.      //
// ========================================================================= //

#ifndef MYRAMATH_IO_IOSIZE_H
#define MYRAMATH_IO_IOSIZE_H

#include <myramath/io/Streams.h>
#include <myramath/MYRAMATH_EXPORT.h>
#include <cstddef>

namespace myra {

class CountingStream : public OutputStream
  {
  public:

    CountingStream()
      : N(0) { }

    virtual void write_binary(const char* p, size_t n)
      { N += n; }

    size_t size()
      { return N; }
    
  private:

    // Accumulates size of all write()'s.
    size_t N;

  };

template<class T> size_t iosize(const T& t)
  {
  CountingStream stream;
  stream << t;
  return stream.size();
  }

} // namespace

#endif