/// <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>
/// FORTRAN file open.
/// </summary>
/// <param name="iodevice">The device number</param>
/// <param name="iostat">A reference variable that will be set to the I/O status</param>
/// <param name="filename">An optional file name</param>
/// <param name="status">Specifies how the file is to be opened: OLD, NEW, UNKNOWN or SCRATCH</param>
/// <param name="access">Specifies the access mode: DIRECT or SEQUENTIAL</param>
/// <param name="form">Specifies the file formatting: FORMATTED or UNFORMATTED</param>
/// <param name="recl">For formatted files, specifies the record size in units</param>
/// <param name="blank">Specifies how blanks are treated in input: NULL or ZERO</param>
/// <returns>A zero value if the operation succeeds, or -1 if the operation fails</returns>
public static int OPEN(int iodevice, ref int iostat, string filename, string status, string access, string form, int recl, string blank)
{
char blankChar;
// Default IOStat is no error
iostat = 0;
// Parse BLANK specifier.
if (blank == null) {
blankChar = ' ';
} else {
string fixedBlank = blank.ToUpper().Trim();
if (fixedBlank == "NULL") {
blankChar = ' ';
} else if (fixedBlank == "ZERO") {
blankChar = '0';
} else {
iostat = IOError.IllegalBlank;
return -1;
}
}
IOFile iofile = IOFile.Get(iodevice);
if (iofile != null) {
// If the FILE= specifier is not included in the OPEN statement, the file to be connected to the
// unit is the same as the file to which the unit is connected.
if (filename == null) {
return 0;
}
// If the file to be connected to the unit is the same as the file
// to which the unit is connected, only the BLANK= specifier may
// have a value different from the one currently in effect. Execution
// of the OPEN statement causes the new value of the BLANK= specifier
// to be in effect. The position of the file is unaffected.
string fixedFilename = filename.Trim();
if (string.Compare(fixedFilename, iofile.Path, StringComparison.CurrentCultureIgnoreCase) == 0) {
iofile.Blank = blankChar;
return 0;
}
// If the file to be connected to the unit is not the same as the file to which the unit is connected,
// the effect is as if a CLOSE statement (12.10.2) without a STATUS= specifier had been executed for
// the unit immediately prior to the execution of the OPEN statement.
iofile.Handle.Close();
} else {
iofile = new IOFile(iodevice);
}
// Consult the status to determine how to open the file. A missing status is treated
// as UNKNOWN.
string fixedStatus = (status == null) ? "UNKNOWN" : status.ToUpper().Trim();
if ((fixedStatus == "OLD" || fixedStatus == "NEW" || fixedStatus == "UNKNOWN") && filename != null) {
bool fileExists = File.Exists(filename.Trim());
if (fixedStatus == "UNKNOWN") {
fixedStatus = (fileExists) ? "OLD" : "NEW";
}
if (fixedStatus == "OLD") {
if (!fileExists) {
iostat = IOError.FileNotFound;
return -1;
}
iofile.IsNew = false;
}
if (fixedStatus == "NEW") {
if (fileExists) {
iostat = IOError.FileAlreadyExists;
return -1;
}
iofile.IsNew = true;
}
iofile.IsScratch = false;
}
// SCRATCH creates a temporary file. Filename cannot be specified here
else if (fixedStatus == "SCRATCH") {
if (filename != null) {
iostat = IOError.FilenameSpecified;
return -1;
}
filename = Path.GetTempFileName();
iofile.IsScratch = true;
}
// STATUS must be UNKNOWN if we get here
else if (fixedStatus != "UNKNOWN") {
iostat = IOError.IllegalStatus;
return -1;
}
// Check access. It must either be SEQUENTIAL or DIRECT. By
// default we assume sequential access.
if (access == null) {
iofile.IsSequential = true;
} else {
string fixedAccess = access.ToUpper().Trim();
if (fixedAccess == "SEQUENTIAL") {
iofile.IsSequential = true;
} else if (fixedAccess == "DIRECT") {
iofile.IsSequential = false;
} else {
iostat = IOError.IllegalAccess;
return -1;
}
}
// Check whether the file is being written formatted or
// unformatted. Access matters here too.
if (form == null) {
iofile.IsFormatted = iofile.IsSequential;
} else {
string fixedForm = form.ToUpper().Trim();
if (fixedForm == "FORMATTED") {
iofile.IsFormatted = true;
} else if (fixedForm == "UNFORMATTED") {
iofile.IsFormatted = false;
} else {
iostat = IOError.IllegalForm;
return -1;
}
}
// Save the record length
iofile.RecordLength = recl;
iofile.RecordIndex = 1;
iofile.Blank = blankChar;
iofile.Unit = iodevice;
if (filename != null) {
iofile.Path = filename.Trim();
}
if (!iofile.Open()) {
iostat = IOError.CannotOpen;
return -1;
}
return 0;
}
/// <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;
}