enablevtmode.cpp

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#ifdef _MSC_VER
#include <iostream>
#include <windows.h>
#endif
 
namespace // Anonymous
{
 
#ifdef _MSC_VER
    class EnableVTMode
    {
    private:
        const DWORD INVALID_MODE = 0xffffffff;
 
    private:
        DWORD dwOriginalOutMode;
        HANDLE hOut;
    public:
        EnableVTMode()
            : dwOriginalOutMode(INVALID_MODE)
            , hOut(INVALID_HANDLE_VALUE)
        {
            hOut = ::GetStdHandle(STD_OUTPUT_HANDLE);
            if (hOut != INVALID_HANDLE_VALUE)
            {
                if (!::GetConsoleMode(hOut, &dwOriginalOutMode))
                {
                    dwOriginalOutMode = INVALID_MODE;
                    std::cout << "Failed to get the Console output's original mode." << std::endl;
                }
                else
                {
                    DWORD dwRequestedOutModes = ENABLE_VIRTUAL_TERMINAL_PROCESSING;
                    DWORD dwOutMode = dwOriginalOutMode | dwRequestedOutModes;
                    if (!SetConsoleMode(hOut, dwOutMode))
                    {
                        std::cout << "Failed to enable the Console output's virtual terminal mode." << std::endl;
                    }
                }
            }
            else
            {
                std::cout << "Failed to get the Console's output handle." << std::endl;
            }
        }
 
        ~EnableVTMode()
        {
            if (dwOriginalOutMode != INVALID_MODE)
            {
                ::SetConsoleMode(hOut, dwOriginalOutMode);
            }
        }
    };
 
#endif
 
} // end anonymous namespace
 
namespace Helpers
{
    void enableVTMode()
    {
#ifdef _MSC_VER
        static EnableVTMode enableVTMode;
#endif
    }
 
} // end namespace