QDPFileWriter class member functions and global functions

Open	QDPFileWriter::QDPFileWriter(
	const XMLBufferWriter& file_xml, const string& path,)
	QDP_volfmt_t volfmt, QDPIO_serialparallel_t serpar,
	QDP_filemode_t mode)
	void QDPFileWriter::open(const XMLBufferWriter& file_xml,
	const string& path,
	QDP_volfmt_t volfmt, QDPIO_serialparallel_t serpar,
	QDP_filemode_t mode)
Close	QDPFileWriter::~QDPFileWriter()
	void QDPFileWriter::close()
Open?	bool QDPFileWriter::is_open()
Errors?	bool QDPFileReader::bad()
Write a T	void write(QDPFileWriter&, XMLBufferWriter& rec_xml, const T&)
Array of T	void write(QDPFileWriter&, XMLBufferWriter& rec_xml,
	const multi1d<T>&)

Concrete class for all QDPIO write operations. Here, write writes the sites as the slowest varying index and the array indices (muli1d) inside of them. bad states if any fatal errors have occurred. The volfmt argument is one of

  QDPIO_SINGLEFILE, QDPIO_MULTIFILE

The serpar argument is one of

  QDPIO_SERIAL, QDPIO_PARALLEL

and the mode argument is one of

  QDPIO_CREATE, QDPIO_OPEN, QDPIO_APPEND

where QDPIO_CREATE fails if the file already exists, QDPIO_OPEN overwrites the file if it already exists and creates it if not, and QDPIO_APPEND fails if the file does not exist and otherwise appends at the end of the file. When appending, the file metadata argument is ignored, since it should already exist.