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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2024 Cppcheck team.
*
* This program 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.
*
* This program 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/>.
*/
#include "color.h"
#include <cstdlib>
#include <sstream>
#include <iostream>
#ifndef _WIN32
#include <unistd.h>
#endif
bool gDisableColors = false;
#ifndef _WIN32
static bool isStreamATty(const std::ostream & os)
{
static const bool stdout_tty = isatty(STDOUT_FILENO);
static const bool stderr_tty = isatty(STDERR_FILENO);
if (&os == &std::cout)
return stdout_tty;
if (&os == &std::cerr)
return stderr_tty;
return (stdout_tty && stderr_tty);
}
#endif
static bool isColorEnabled(const std::ostream & os)
{
// See https://bixense.com/clicolors/
static const bool color_forced_off = (nullptr != std::getenv("NO_COLOR"));
if (color_forced_off)
{
return false;
}
static const bool color_forced_on = (nullptr != std::getenv("CLICOLOR_FORCE"));
if (color_forced_on)
{
return true;
}
#ifdef _WIN32
(void)os;
return false;
#else
return isStreamATty(os);
#endif
}
std::ostream& operator<<(std::ostream & os, Color c)
{
if (!gDisableColors && isColorEnabled(os))
return os << "\033[" << static_cast<std::size_t>(c) << "m";
return os;
}
std::string toString(Color c)
{
std::ostringstream ss;
ss << c;
return ss.str();
}
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