ILogger.cxx

// C++
#include <iostream>
 
// Cosmos
#include <cosmos/fs/FileDescriptor.hxx>
#include <cosmos/io/ILogger.hxx>
#include <cosmos/io/Terminal.hxx>
 
namespace cosmos {
 
using namespace cosmos::term;
 
ILogger::ILogger() :
        m_err{  "Error:   ", FrontColor{TermColor::RED}},
        m_warn{ "Warning: ", FrontColor{TermColor::YELLOW}},
        m_info{ "Info:    ", FrontColor{TermColor::WHITE}},
        m_debug{"Debug:   ", FrontColor{TermColor::CYAN}}
{}
 
bool ILogger::isTTY(const std::ostream &o) {
        /*
         * there's no elegant, portable way to get the file descriptor from an
         * ostream thus we have to use some heuristics ...
         */
 
        FileDescriptor fd_to_check;
 
        if (auto thisbuf = o.rdbuf(); thisbuf == std::cout.rdbuf()) {
                fd_to_check.setFD(FileNum::STDOUT);
        } else if (thisbuf == std::cerr.rdbuf()) {
                fd_to_check.setFD(FileNum::STDERR);
        } else {
                return false;
        }
 
        return Terminal{fd_to_check}.isTTY();
}
 
void ILogger::setStream(std::ostream &s, StreamState &state) {
        state.stream = &s;
        state.is_tty = isTTY(s);
        state.enabled = (&state == &m_debug) ? false : true;
}
 
void ILogger::setStreams(
                std::ostream &debug, std::ostream &info,
                std::ostream &warn, std::ostream &err) {
        setStream(debug, m_debug);
        setStream(err, m_err);
        setStream(info, m_info);
        setStream(warn, m_warn);
}
 
} // end ns