OutputStream.h

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//
// File: OutputStream.h
// Authors:
//   Julien Dutheil
// Created: 2010-01-25 17:41:00
//
 
/*
  Copyright or © or Copr. Bio++ Development Team, (November 17, 2004)
  
  This software is a computer program whose purpose is to provide utilitary
  classes. This file belongs to the Bio++ Project.
  
  This software is governed by the CeCILL license under French law and
  abiding by the rules of distribution of free software. You can use,
  modify and/ or redistribute the software under the terms of the CeCILL
  license as circulated by CEA, CNRS and INRIA at the following URL
  "http://www.cecill.info".
  
  As a counterpart to the access to the source code and rights to copy,
  modify and redistribute granted by the license, users are provided only
  with a limited warranty and the software's author, the holder of the
  economic rights, and the successive licensors have only limited
  liability.
  
  In this respect, the user's attention is drawn to the risks associated
  with loading, using, modifying and/or developing or reproducing the
  software by the user in light of its specific status of free software,
  that may mean that it is complicated to manipulate, and that also
  therefore means that it is reserved for developers and experienced
  professionals having in-depth computer knowledge. Users are therefore
  encouraged to load and test the software's suitability as regards their
  requirements in conditions enabling the security of their systems and/or
  data to be ensured and, more generally, to use and operate it in the
  same conditions as regards security.
  
  The fact that you are presently reading this means that you have had
  knowledge of the CeCILL license and that you accept its terms.
*/
 
#ifndef BPP_IO_OUTPUTSTREAM_H
#define BPP_IO_OUTPUTSTREAM_H
 
 
#include "../Clonable.h"
 
// From the STL:
#include <string>
#include <iostream>
#include <fstream>
#include <sstream>
#include <memory>
#include <iomanip>
 
namespace bpp
{
class OutputStream :
  public virtual Clonable
{
public:
  virtual OutputStream& operator<<(const std::string& message) = 0;
  virtual OutputStream& operator<<(const char* message) = 0;
  virtual OutputStream& operator<<(const char& message) = 0;
  virtual OutputStream& operator<<(const int& message) = 0;
  virtual OutputStream& operator<<(const unsigned int& message) = 0;
  virtual OutputStream& operator<<(const long int& message) = 0;
  virtual OutputStream& operator<<(const unsigned long int& message) = 0;
  virtual OutputStream& operator<<(const double& message) = 0;
  virtual OutputStream& operator<<(const long double& message) = 0;
  virtual OutputStream& operator<<(const bool& message) = 0;
  virtual OutputStream& endLine() = 0;
  virtual OutputStream& flush() = 0;
  virtual OutputStream& setPrecision(int digit) = 0;
  virtual int getPrecision() const = 0;
  virtual OutputStream& enableScientificNotation(bool yn) = 0;
  virtual bool isScientificNotationEnabled() const = 0;
 
  OutputStream* clone() const = 0;
};
 
 
class AbstractOutputStream :
  public virtual OutputStream
{
private:
  int precision_;
  bool scienceNotation_;
 
public:
  AbstractOutputStream() : precision_(6), scienceNotation_(false) {}
 
public:
  OutputStream& setPrecision(int digit)
  {
    precision_ = digit;
    return *this;
  }
  int getPrecision() const { return precision_; }
 
  virtual OutputStream& enableScientificNotation(bool yn) { scienceNotation_ = yn; return *this; }
  virtual bool isScientificNotationEnabled() const { return scienceNotation_; }
};
 
 
class NullOutputStream :
  public AbstractOutputStream
{
public:
  NullOutputStream& operator<<(const std::string& message) { return *this; }
  NullOutputStream& operator<<(const char* message) { return *this; }
  NullOutputStream& operator<<(const char& message) { return *this; }
  NullOutputStream& operator<<(const int& message) { return *this; }
  NullOutputStream& operator<<(const unsigned int& message) { return *this; }
  NullOutputStream& operator<<(const long int& message) { return *this; }
  NullOutputStream& operator<<(const unsigned long int& message) { return *this; }
  NullOutputStream& operator<<(const double& message) { return *this; }
  NullOutputStream& operator<<(const long double& message) { return *this; }
  NullOutputStream& operator<<(const bool& message) { return *this; }
  NullOutputStream& endLine() { return *this; }
  NullOutputStream& flush() { return *this; }
 
  NullOutputStream* clone() const { return new NullOutputStream(*this); }
};
 
 
class StlOutputStream :
  public AbstractOutputStream
{
private:
  mutable std::unique_ptr<std::ostream> stream_;
 
public:
  StlOutputStream(std::ostream* stream) : stream_(stream) {}
  StlOutputStream(const StlOutputStream& stlos) : stream_() { stream_ = std::move(stlos.stream_); }
  StlOutputStream& operator=(const StlOutputStream& stlos)
  {
    stream_ = std::move(stlos.stream_);
    return *this;
  }
 
public:
  StlOutputStream& operator<<(const std::string& message) { if (stream_.get()) *stream_ << message; return *this; }
  StlOutputStream& operator<<(const char* message) { if (stream_.get()) *stream_ << message; return *this; }
  StlOutputStream& operator<<(const char& message) { if (stream_.get()) *stream_ << message; return *this; }
  StlOutputStream& operator<<(const int& message) { if (stream_.get()) *stream_ << message; return *this; }
  StlOutputStream& operator<<(const unsigned int& message) { if (stream_.get()) *stream_ << message; return *this; }
  StlOutputStream& operator<<(const long int& message) { if (stream_.get()) *stream_ << message; return *this; }
  StlOutputStream& operator<<(const unsigned long int& message) { if (stream_.get()) *stream_ << message; return *this; }
  StlOutputStream& operator<<(const double& message)
  {
    if (stream_.get())
      *stream_ << std::setprecision(getPrecision()) << (isScientificNotationEnabled() ? std::scientific : std::fixed) << message;
    return *this;
  }
  StlOutputStream& operator<<(const long double& message)
  {
    if (stream_.get())
      *stream_ << std::setprecision(getPrecision()) << (isScientificNotationEnabled() ? std::scientific : std::fixed) << message;
    return *this;
  }
  StlOutputStream& operator<<(const bool& message) { if (stream_.get()) *stream_ << message; return *this; }
  StlOutputStream& endLine() { if (stream_.get()) *stream_ << std::endl; return *this; }
  StlOutputStream& flush() { if (stream_.get()) stream_->flush(); return *this; }
 
  StlOutputStream* clone() const { return new StlOutputStream(*this); }
};
 
 
class StlOutputStreamWrapper :
  public AbstractOutputStream
{
protected:
  std::ostream* stream_;
 
public:
  StlOutputStreamWrapper(std::ostream* stream) : stream_(stream) {}
  StlOutputStreamWrapper(const StlOutputStreamWrapper& stlos) : stream_(stlos.stream_) {}
  StlOutputStreamWrapper& operator=(const StlOutputStreamWrapper& stlos) { stream_ = stlos.stream_; return *this; }
 
public:
  StlOutputStreamWrapper& operator<<(const std::string& message) { if (stream_) *stream_ << message; return *this; }
  StlOutputStreamWrapper& operator<<(const char* message) { if (stream_) *stream_ << message; return *this; }
  StlOutputStreamWrapper& operator<<(const char& message) { if (stream_) *stream_ << message; return *this; }
  StlOutputStreamWrapper& operator<<(const int& message) { if (stream_) *stream_ << message; return *this; }
  StlOutputStreamWrapper& operator<<(const unsigned int& message) { if (stream_) *stream_ << message; return *this; }
 
  StlOutputStreamWrapper& operator<<(const long int& message) { if (stream_) *stream_ << message; return *this; }
  StlOutputStreamWrapper& operator<<(const unsigned long int& message) { if (stream_) *stream_ << message; return *this; }
  StlOutputStreamWrapper& operator<<(const double& message)
  {
    if (stream_)
      *stream_ << std::setprecision(getPrecision()) << (isScientificNotationEnabled() ? std::scientific : std::fixed) << message;
    return *this;
  }
  StlOutputStreamWrapper& operator<<(const long double& message)
  {
    if (stream_)
      *stream_ << std::setprecision(getPrecision()) << (isScientificNotationEnabled() ? std::scientific : std::fixed) << message;
    return *this;
  }
  StlOutputStreamWrapper& operator<<(const bool& message) { if (stream_) *stream_ << message; return *this; }
  StlOutputStreamWrapper& endLine() { if (stream_) *stream_ << std::endl; return *this; }
  StlOutputStreamWrapper& flush() { if (stream_) stream_->flush(); return *this; }
 
  StlOutputStreamWrapper* clone() const { return new StlOutputStreamWrapper(*this); }
};
 
class StdOut :
  public AbstractOutputStream
{
public:
  OutputStream& operator<<(const std::string& message) { std::cout << message; return *this; }
  OutputStream& operator<<(const char* message) { std::cout << message; return *this; }
  OutputStream& operator<<(const char& message) { std::cout << message; return *this; }
  OutputStream& operator<<(const int& message) { std::cout << message; return *this; }
  OutputStream& operator<<(const unsigned int& message) { std::cout << message; return *this; }
  OutputStream& operator<<(const long int& message) { std::cout << message; return *this; }
  OutputStream& operator<<(const unsigned long int& message) { std::cout << message; return *this; }
  OutputStream& operator<<(const double& message)
  {
    std::cout << std::setprecision(getPrecision()) << (isScientificNotationEnabled() ? std::scientific : std::fixed) << message;
    return *this;
  }
  OutputStream& operator<<(const long double& message)
  {
    std::cout << std::setprecision(getPrecision()) << (isScientificNotationEnabled() ? std::scientific : std::fixed) << message;
    return *this;
  }
  OutputStream& operator<<(const bool& message) { std::cout << message; return *this; }
  OutputStream& endLine() { std::cout << std::endl; return *this; }
  OutputStream& flush() { std::cout.flush(); return *this; }
 
  StdOut* clone() const { return new StdOut(*this); }
};
 
 
class StdErr :
  public AbstractOutputStream
{
public:
  OutputStream& operator<<(const std::string& message) { std::cerr << message; return *this; }
  OutputStream& operator<<(const char* message) { std::cerr << message; return *this; }
  OutputStream& operator<<(const char& message) { std::cerr << std::setprecision(getPrecision()) << message; return *this; }
  OutputStream& operator<<(const int& message) { std::cerr << std::setprecision(getPrecision()) << message; return *this; }
  OutputStream& operator<<(const unsigned int& message) { std::cerr << message; return *this; }
  OutputStream& operator<<(const long int& message) { std::cerr << std::setprecision(getPrecision()) << message; return *this; }
  OutputStream& operator<<(const unsigned long int& message) { std::cerr << message; return *this; }
  OutputStream& operator<<(const double& message)
  {
    std::cerr << std::setprecision(getPrecision()) << (isScientificNotationEnabled() ? std::scientific : std::fixed) << message;
    return *this;
  }
  OutputStream& operator<<(const long double& message)
  {
    std::cerr << std::setprecision(getPrecision()) << (isScientificNotationEnabled() ? std::scientific : std::fixed) << message;
    return *this;
  }
  OutputStream& operator<<(const bool& message) { std::cerr << message; return *this; }
  OutputStream& endLine() { std::cerr << std::endl; return *this; }
  OutputStream& flush() { std::cerr.flush(); return *this; }
 
  StdErr* clone() const { return new StdErr(*this); }
};
 
class StdStr :
  public StlOutputStreamWrapper
{
public:
  StdStr() : StlOutputStreamWrapper(new std::ostringstream()){}
 
  std::string str() const { return dynamic_cast<const std::ostringstream*>(stream_)->str();}
 
  ~StdStr() { delete stream_;}
};
} // end of namespace bpp;
#endif // BPP_IO_OUTPUTSTREAM_H