/*
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/*! \internal \file
 * \brief
 * Implements classes in stdiohelper.h.
 *
 * \author Mark Abraham <mark.j.abraham@gmail.com>
 * \ingroup module_testutils
 */
#include "gmxpre.h"

#include "testutils/stdiohelper.h"

#include <cerrno>
#include <cstdio>

#include "gromacs/utility/exceptions.h"
#include "gromacs/utility/textwriter.h"

#include "testutils/testfilemanager.h"

namespace gmx
{
namespace test
{

/********************************************************************
 * StdioTestHelper
 */

StdioTestHelper::~StdioTestHelper()
{
    if (redirected)
    {
        fclose(stdin);
    }
}

void StdioTestHelper::redirectStringToStdin(const char* theString)
{
    const std::string fakeStdin = fileManager_.getTemporaryFilePath(".stdin").u8string();
    gmx::TextWriter::writeFileFromString(fakeStdin, theString);
    if (nullptr == std::freopen(fakeStdin.c_str(), "r", stdin))
    {
        GMX_THROW_WITH_ERRNO(FileIOError("Failed to redirect a string to stdin"), "freopen", errno);
    }
    redirected = true;
}

} // namespace test
} // namespace gmx
