Program Listing for File format.hpp
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)
/*-
* 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
#if __has_include(<format>)
#include <format>
#define USE_STD_FORMAT 1
#else
#include <fmt/format.h>
#endif
#include <string>
namespace cif
{
#if USE_STD_FORMAT
using std::format;
#else
using fmt::format;
#endif
// --------------------------------------------------------------------
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()
{
m_os.rdbuf(m_upstream);
}
virtual int_type
overflow(int_type ic = traits_type::eof())
{
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;
}
std::streambuf *get_upstream() const { return m_upstream; }
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