src/testutils/stdiohelper.cpp

   1 /*
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   5  * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
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  35 /*! \internal \file
  36  * \brief
  37  * Implements classes in stdiohelper.h.
  38  *
  39  * \author Mark Abraham <mark.j.abraham@gmail.com>
  40  * \ingroup module_testutils
  41  */
  42 #include "gmxpre.h"
  43
  44 #include "stdiohelper.h"
  45
  46 #include <cerrno>
  47 #include <cstdio>
  48
  49 #include "gromacs/utility/exceptions.h"
  50 #include "gromacs/utility/textwriter.h"
  51
  52 #include "testutils/testfilemanager.h"
  53
  54 namespace gmx
  55 {
  56 namespace test
  57 {
  58
  59 /********************************************************************
  60  * StdioTestHelper
  61  */
  62
  63 void
  64 StdioTestHelper::redirectStringToStdin(const char *theString)
  65 {
  66     const std::string fakeStdin = fileManager_.getTemporaryFilePath(".stdin");
  67     gmx::TextWriter::writeFileFromString(fakeStdin, theString);
  68     if (nullptr == std::freopen(fakeStdin.c_str(), "r", stdin))
  69     {
  70         GMX_THROW_WITH_ERRNO(FileIOError("Failed to redirect a string to stdin"),
  71                              "freopen",
  72                              errno);
  73     }
  74 }
  75
  76 } // namespace test
  77 } // namespace gmx