terminal.hpp

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// SPDX-FileCopyrightText: 2006-2024, Knut Reinert & Freie Universität Berlin
// SPDX-FileCopyrightText: 2016-2024, Knut Reinert & MPI für molekulare Genetik
// SPDX-License-Identifier: BSD-3-Clause
 
#pragma once
 
#ifndef _WIN32
#    include <unistd.h>
 
#    include <sys/ioctl.h>
#else
#    include <io.h>
#    include <stdio.h>
#endif
 
#include <sharg/platform.hpp>
 
namespace sharg::detail
{
 
inline bool stdin_is_terminal()
{
#ifndef _WIN32
    return isatty(STDIN_FILENO);
#else
    return _isatty(_fileno(stdin));
#endif
}
 
inline bool stdout_is_terminal()
{
#ifndef _WIN32
    return isatty(STDOUT_FILENO);
#else
    return _isatty(_fileno(stdout));
#endif
}
 
inline bool stderr_is_terminal()
{
#ifndef _WIN32
    return isatty(STDERR_FILENO);
#else
    return _isatty(_fileno(stderr));
#endif
}
 
// ----------------------------------------------------------------------------
// Function get_terminal_size()
// ----------------------------------------------------------------------------
 
inline unsigned get_terminal_width()
{
#ifndef _WIN32
 
    struct winsize w;
    w.ws_row = 0;
    w.ws_col = 0;
 
    ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
 
    return w.ws_col;
#else
    return 80; // Not implemented for Windows yet. For inspiration, see https://stackoverflow.com/a/12642749.
#endif
}
 
} // namespace sharg::detail