/// <summary>
/// Initializes a new instance of the <see cref="JComLib.WriteManager"/> class for the
/// given IO device, record index and format string.
/// </summary>
/// <param name="iodevice">The device to read from</param>
/// <param name="record">The index of the record to write (for direct access)</param>
/// <param name="formatString">Format string</param>
public WriteManager(int iodevice, int record, string formatString)
{
_file = IOFile.Get(iodevice);
if (_file == null) {
_file = new IOFile(iodevice);
_file.Open();
}
if (record >= 1) {
_file.RecordIndex = record;
}
_file.IsFormatted = !string.IsNullOrEmpty(formatString);
_format = new FormatManager(formatString);
}
/// <summary>
/// Initializes a new instance of the <see cref="JComLib.ReadManager"/> class for the
/// given IO device, record index and format string.
/// </summary>
/// <param name="iodevice">The device to read from</param>
/// <param name="record">The index of the record to read (for direct access)</param>
/// <param name="formatString">Format string</param>
public ReadManager(int iodevice, int record, string formatString)
{
_file = IOFile.Get(iodevice);
if (_file == null) {
_file = new IOFile(iodevice);
_file.Open();
}
if (record >= 1) {
_file.RecordIndex = record;
}
if (formatString == "*") {
formatString = string.Empty;
_file.IsFormatted = true;
} else {
_file.IsFormatted = !string.IsNullOrEmpty(formatString);
}
_format = new FormatManager(formatString);
_format.BlanksAsZero = (_file.Blank == 'Z');
_readIndex = -1;
}
/// <summary>
/// ENDFILE keyword.
/// For sequential files, writes an end-of-file record to the file and positions the file
/// after this record (the terminal point). For direct access files, truncates the file
/// after the current record.
/// </summary>
/// <param name="iodevice">The device number</param>
/// <param name="iostat">A reference variable that will be set to the I/O status</param>
/// <returns>A zero value if the operation succeeds, or -1 if the operation fails</returns>
public static int ENDFILE(int iodevice, ref int iostat)
{
iostat = 0;
IOFile iofile = IOFile.Get(iodevice);
if (iofile == null) {
iofile = new IOFile(iodevice);
iofile.Open();
}
if (!iofile.EndFile()) {
iostat = IOError.EndfileError;
return -1;
}
return 0;
}