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//===-- support/terminal_colors.cpp -----------------------------*- C++ -*-===//
//
// The RoSA Framework
//
// Distributed under the terms and conditions of the Boost Software License 1.0.
// See accompanying file LICENSE.
//
// If you did not receive a copy of the license file, see
// http://www.boost.org/LICENSE_1_0.txt.
//
//===----------------------------------------------------------------------===//
///
/// \file support/terminal_colors.cpp
///
/// \author David Juhasz (david.juhasz@tuwien.ac.at)
///
/// \date 2017
///
/// \brief Implementation for rosa/support/terminal_colors.h.
///
//===----------------------------------------------------------------------===//
#include "rosa/support/terminal_colors.h"
#include "rosa/config/config.h"
#include "rosa/support/debug.hpp"
#include <array>
#ifdef ROSA_POSIX
#include <unistd.h>
#endif // defined(ROSA_POSIX)
namespace rosa {
namespace terminal {
/// ANSI color codes for POSIX terminals.
///
/// \note Use \c std::array for runtime efficiency, though static casting is
/// necessary for indexing.
///
/// \note Do not index with \c rosa::Color::NumColors!
constexpr std::array<const char *, static_cast<size_t>(Color::NumColors)>
ANSIColorCodes{{
"0", ///< Default - Attribute reset
"30", ///< Black
"31", ///< Red
"32", ///< Green
"33", ///< Yelow
"34", ///< Blue
"35", ///< Magenta
"36", ///< Cyan
"37", ///< Lightgrey
"90", ///< Darkgrey
"91", ///< Lightred
"92", ///< Lightgreen
"93", ///< Lightyellow
"94", ///< Lightblue
"95", ///< Lightmagenta
"96", ///< Lightcyan
"97" ///< White
}};
std::ostream &operator<<(std::ostream &os, const Color color) {
ASSERT(color != Color::NumColors);
// Handle color only when printing to terminal and it supports colors.
#ifdef ROSA_POSIX
// Identify terminal by checking if the stream is buffered as one of the
// standard outputs, and the corresponding C standard output stream is
// pointing to a terminal.
//
// \note This implementation may be tricked so that it does not print color
// to terminal, but should never print color codes to a non-terminal output.
if ((os.rdbuf() == std::cout.rdbuf() && isatty(fileno(stdin))) ||
((os.rdbuf() == std::cerr.rdbuf() || os.rdbuf() == std::clog.rdbuf()) &&
isatty(fileno(stderr)))) {
os << "\033[" << ANSIColorCodes[static_cast<size_t>(color)] << "m";
}
#elif defined(ROSA_WINDOWS)
// \todo Windows terminals support ANSI color codes from Windows 10
// Threshold 2, custom stuff is required for earlier versions.
(void)ANSIColorCodes; // To shut up compiler warning.
#endif // defined(ROSA_POSIX) || defined(ROSA_WINDOWS)
return os;
}
} // End namespace terminal
} // End namespace rosa

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