GUI/src/utilities/StdOutRedirector.cpp

#include "StdOutRedirector.h"

#include <QTimer>
#include <QDebug>

StdOutRedirector::StdOutRedirector()
    : QObject()
{
#ifdef __linux__
    if (pipe(mFdguistd) == -1)
        printf("failed!");
#else
    // Redirect
    if (_pipe(mFdguistd, 4096, _O_BINARY) == -1)
        printf("failed!");
#endif
    //int tr = fcntl(fdguistd, O_NONBLOCK);
    // Duplicate stdout file descriptor (next line will close original)
    mFdStdOut = dup(fileno(stdout));
    // Duplicate write end of pipe to stdout file descriptor
    if (dup2(mFdguistd[1], fileno(stdout)) != 0)
        printf("failed!");
    // Close original 
    close(1);
    // Duplicate write end of original
    dup2(mFdguistd[1], 1);

    mBuffer = new char[mBufferSize];
}

StdOutRedirector::~StdOutRedirector()
{
    delete[] mBuffer;
}

void StdOutRedirector::readOutsToTF()
{
    size_t len;
    char* copy;

    int n_out;
    QString str;
    fflush(stdout);
    //Perhaps there is a non-blocking version of _read() that you can call ?
    memset(mBuffer, 0, mBufferSize);
    n_out = read(mFdguistd[0], mBuffer, mBufferSize);
    if (n_out <= 0)
    {
        return;
    }
    if (n_out >= 1)
    {
        str.append(QString(mBuffer));
        int con = str.lastIndexOf('\n');
        int remv = str.at(con - 1) == '\n' ? 1 : 0;
        if (con > 0)
        {
            str = str.remove(con - remv, str.length());
            mOutput->append(str);
        }
    }
    return;
}