
.. _program_listing_file_cif++_format.hpp:

Program Listing for File format.hpp
===================================

|exhale_lsh| :ref:`Return to documentation for file <file_cif++_format.hpp>` (``cif++/format.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   /*-
    * SPDX-License-Identifier: BSD-2-Clause
    *
    * Copyright (c) 2022 NKI/AVL, Netherlands Cancer Institute
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions are met:
    *
    * 1. Redistributions of source code must retain the above copyright notice, this
    *    list of conditions and the following disclaimer
    * 2. Redistributions in binary form must reproduce the above copyright notice,
    *    this list of conditions and the following disclaimer in the documentation
    *    and/or other materials provided with the distribution.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
    * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
    * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    */
   
   #pragma once
   
   #include <ostream>
   #include <streambuf>
   
   
   
   namespace cif
   {
   
   // --------------------------------------------------------------------
   
   class fill_out_streambuf : public std::streambuf
   {
     public:
   
   
       using base_type = std::streambuf;
       using int_type = base_type::int_type;
       using char_type = base_type::char_type;
       using traits_type = base_type::traits_type;
   
   
       fill_out_streambuf(std::ostream &os, int width = 80)
           : m_os(os)
           , m_upstream(os.rdbuf())
           , m_width(width)
       {
       }
   
   
       ~fill_out_streambuf() override
       {
           m_os.rdbuf(m_upstream);
       }
   
   
       
       int_type overflow(int_type ic = traits_type::eof()) override
       {
           char ch = traits_type::to_char_type(ic);
   
           int_type result = ic;
   
           if (ch == '\n')
           {
               for (int i = m_column_count; result != traits_type::eof() and i < m_width; ++i)
                   result = m_upstream->sputc(' ');
           }
   
           if (result != traits_type::eof())
               result = m_upstream->sputc(ch);
   
           if (result != traits_type::eof())
           {
               if (ch == '\n')
               {
                   m_column_count = 0;
                   ++m_line_count;
               }
               else
                   ++m_column_count;
           }
   
           return result;
       }
   
       [[nodiscard]] std::streambuf *get_upstream() const { return m_upstream; }
   
       [[nodiscard]] int get_line_count() const { return m_line_count; }
   
     private:
       std::ostream &m_os;
       std::streambuf *m_upstream;
       int m_width;
       int m_line_count = 0;
       int m_column_count = 0;
   };
   
   } // namespace pdbx
