/*! \brief Open a file.
\param filename The name of the file to open
\param createNew When true, the file will be created if it doesn't exist yet
\param readOnly When true, the file will be marked as read only for %IoInterfaceFile,
preventing accidental writes to the file.
\returns XRV_OK if the file was opened successfully
\sa createFile
*/
XsResultValue IoInterfaceFile::open(const XsString& filename, bool createNew, bool readOnly)
{
if (m_handle)
return m_lastResult = XRV_ALREADYOPEN;
//! \test does this work for non-existing files? Or do we need a check and create?
m_readOnly = readOnly;
if (readOnly)
#ifdef _WIN32
m_handle = _wfopen(filename.toStdWString().c_str(), L"rb"); // open for read only (r)
#else
m_handle = fopen(filename.c_str(), "rb"); // open for read only (r)
#endif
else
/*! \brief Create an empty file
\param filename The desired (path+)name of the file
\returns XRV_OK if the file was created successfully
*/
XsResultValue IoInterfaceFile::create(const XsString& filename)
{
if (m_handle) return m_lastResult = XRV_ALREADYOPEN;
//! \test does this work for non-existing files? Or do we need a check and
//! create?
#ifdef _WIN32
m_handle = _wfopen(
filename.toStdWString().c_str(), L"w+b"); // open for update (r/w)
#else
m_handle = fopen(filename.c_str(), "w+b"); // open for update (r/w)
#endif
if (m_handle == nullptr) return m_lastResult = XRV_OUTPUTCANNOTBEOPENED;
bool fail = false;
#ifdef _WIN32
wchar_t fullpath[XS_MAX_FILENAME_LENGTH];
if (_wfullpath(
fullpath, filename.toStdWString().c_str(),
XS_MAX_FILENAME_LENGTH) == nullptr)
fail = true;
#else
// based on the assumption that this doesn't concern the serial port, handle
// it the same way using realpath(). Apparently realpath() doesn't require a
// maximum length. One would possibly want to write a wrapper for it.
char fullpath[XS_MAX_FILENAME_LENGTH * 2];
if (realpath(filename.c_str(), fullpath) == nullptr) fail = true;
#endif
m_filename = XsString(fullpath);
if (fail)
{
fclose(m_handle);
#ifdef _WIN32
_wunlink(m_filename.toStdWString().c_str());
#else
unlink(m_filename.c_str());
#endif
m_handle = 0;
return m_lastResult = XRV_INVALIDPARAM;
}
m_readPos = 0;
m_writePos = 0;
m_fileSize = 0;
m_reading = true;
m_readOnly = false;
return m_lastResult = XRV_OK;
}
void MetronomeRelation::setValue( const XsString& value )
{
myValue.setValue( value.getValue() );
}
