formater.hh

// -*- coding: utf-8 -*-
// Copyright (C) by the Spot authors, see the AUTHORS file for details.
//
// This file is part of Spot, a model checking library.
//
// Spot is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// Spot is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
// License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
#pragma once
 
#include <spot/misc/common.hh>
#include <spot/misc/timer.hh>
#include <iostream>
#include <string>
#include <vector>
 
namespace spot
{
 
  class printable
  {
  public:
    virtual ~printable()
    {
    }
 
    virtual void
    print(std::ostream&, const char*) const = 0;
  };
 
 
  template <class T>
  class printable_value: public printable
  {
  protected:
    T val_; 
  public:
    const T& val() const
    {
      return val_;
    }
 
    T& val()
    {
      return val_;
    }
 
    operator const T&() const
    {
      return val();
    }
 
    operator T&()
    {
      return val();
    }
 
    printable_value&
    operator=(const T& new_val)
    {
      val_ = new_val;
      return *this;
    }
 
    printable_value&
    operator=(T&& new_val)
    {
      val_ = std::move(new_val);
      return *this;
    }
 
    virtual void
    print(std::ostream& os, const char*) const override
    {
      os << val_;
    }
  };
 
  class printable_id: public printable
  {
  public:
    virtual void
    print(std::ostream& os, const char* x) const override
    {
      os << '%' << *x;
    }
  };
 
  class printable_percent: public printable
  {
  public:
    virtual void
    print(std::ostream& os, const char*) const override
    {
      os << '%';
    }
  };
 
 
  class SPOT_API formater
  {
    printable_id id;
    printable_percent percent;
  public:
 
    formater()
      : has_(256), call_(256, &id)
    {
      call_['%'] = call_[0] = &percent;
    }
 
    virtual ~formater()
    {
    }
 
    void
    scan(const char* fmt, std::vector<bool>& has) const;
 
    void
    scan(const std::string& fmt, std::vector<bool>& has) const
    {
      scan(fmt.c_str(), has);
    }
 
    void
    prime(const char* fmt);
 
    void
    prime(const std::string& fmt)
    {
      prime(fmt.c_str());
    }
 
    bool
    has(char c) const
    {
      return has_[c];
    }
 
    void
    declare(char c, const printable* f)
    {
      call_[c] = f;
    }
 
    void
    set_output(std::ostream& output)
    {
      output_ = &output;
    }
 
    std::ostream&
    format(const char* fmt);
 
    std::ostream&
    format(std::ostream& output, const char* fmt)
    {
      std::ostream* tmp = output_;
      set_output(output);
      format(fmt);
      set_output(*tmp);
      return output;
    }
 
    std::ostream&
    format(const std::string& fmt)
    {
      return format(fmt.c_str());
    }
 
    std::ostream&
    format(std::ostream& output, const std::string& fmt)
    {
      return format(output, fmt.c_str());
    }
 
  private:
    std::vector<bool> has_;
    std::vector<const printable*> call_;
  protected:
    std::ostream* output_; 
  };
 
}