/// <summary>
/// Creates a new RDY file object.
/// </summary>
public static RdyFile Create(char tableType, int tableId, int recordSize, int keyLength = 0, int keyOffset = 0, bool sorted = false, bool packed = false, char tableVersion = 'A')
{
if (recordSize < 0 || recordSize > 99)
{
throw new ArgumentOutOfRangeException("recordSize", "Invalid record size for RDY file.");
}
var header = RdyHeader.Create(tableType, tableId, recordSize, keyLength, keyOffset, sorted, packed, tableVersion);
var rdy = new RdyFile {
Header = header, _records = new List <RdyRecord>()
};
return(rdy);
}
/// <summary>
/// Returns an awaitable task that reads an RDY file from an input stream.
/// </summary>
internal static async Task <RdyFile> ReadAsync(Stream stream, bool force = false)
{
if (stream == null)
{
throw new ArgumentNullException("stream", "The input stream cannot be null.");
}
if (!stream.CanRead)
{
throw new InvalidOperationException("Could not read from the input stream.");
}
var rdy = new RdyFile();
using (var reader = new StreamReader(stream))
{
// Read and parse the header
var header = await rdy.ReadHeaderAsync(reader);
rdy.Header = RdyHeader.Parse(header, force);
// See if we are working with a directory file
if (rdy.Header.TableType == 'z')
{
rdy.IsDirectoryFile = true;
// Put data back in the buffer
rdy._buffer.Insert(0, header.Substring(9));
// Read the body as directory data
await rdy.ReadDirBodyAsync(reader);
}
else
{
// Read and load the records in the body
await rdy.ReadBodyAsync(reader, force);
}
}
return(rdy);
}
internal static RdyHeader Parse(string data, bool force)
{
var header = new RdyHeader();
if (data == null)
throw new ArgumentNullException("data");
if (data.Length != HeaderSize && !force)
throw new ArgumentException(string.Format("The header must consist of exactly {0} characters.", HeaderSize));
header.TableType = data[0];
int i;
if (!int.TryParse(data.Substring(1, 3), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
throw new InvalidDataException("Couldn't parse the table ID from the RDY header.");
header.TableId = i;
if (!int.TryParse(data.Substring(4, 5), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
throw new InvalidDataException("Couldn't parse the total number of characters from the RDY header.");
header.TotalCharacters = i;
if (header.TableType == 'z')
{
// z indicates a "directory file", which has a truncated header. Exit early.
return header;
}
header.TableVersion = data[9];
if (!int.TryParse(data.Substring(10, 2), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
throw new InvalidDataException("Couldn't parse the header size from the RDY header.");
if (i != HeaderSize && !force)
throw new InvalidDataException(string.Format("The header size in the RDY file should state {0} but it was {1} instead.", HeaderSize, i));
if (!int.TryParse(data.Substring(12, 2), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
throw new InvalidDataException("Couldn't parse the record size from the RDY header.");
header.RecordSize = i;
// work around a known issue with v001 data (from JPR001.RDY)
if (header.TableType == 'v' && header.TableId == 1 && header.RecordSize == 96)
header.RecordSize = 6;
header.RecordCount = SynelNumericFormat.Convert(data.Substring(14, 3));
if (!int.TryParse(data.Substring(17, 2), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
throw new InvalidDataException("Couldn't parse the key length from the RDY header.");
header.KeyLength = i;
if (!int.TryParse(data.Substring(19, 2), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
throw new InvalidDataException("Couldn't parse the key offset from the RDY header.");
header.KeyOffset = i;
if (!int.TryParse(data.Substring(21, 2), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
throw new InvalidDataException("Couldn't parse the sorted/packed flags from the RDY header.");
header.Sorted = i == 2 || i == 3;
header.Packed = i == 1 || i == 3;
// Make sure the character count makes sense
var expectedChars = HeaderSize + header.RecordCount * header.RecordSize;
if (header.TotalCharacters != expectedChars && !force)
throw new InvalidDataException(string.Format("The total character count doesn't match. It was reported as {0}, but calculated as {1}.",
header.TotalCharacters, expectedChars));
return header;
}
internal static RdyHeader Parse(string data, bool force)
{
var header = new RdyHeader();
if (data == null)
{
throw new ArgumentNullException("data");
}
if (data.Length != HeaderSize && !force)
{
throw new ArgumentException(string.Format("The header must consist of exactly {0} characters.", HeaderSize));
}
header.TableType = data[0];
int i;
if (!int.TryParse(data.Substring(1, 3), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
{
throw new InvalidDataException("Couldn't parse the table ID from the RDY header.");
}
header.TableId = i;
if (!int.TryParse(data.Substring(4, 5), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
{
throw new InvalidDataException("Couldn't parse the total number of characters from the RDY header.");
}
header.TotalCharacters = i;
if (header.TableType == 'z')
{
// z indicates a "directory file", which has a truncated header. Exit early.
return(header);
}
header.TableVersion = data[9];
if (!int.TryParse(data.Substring(10, 2), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
{
throw new InvalidDataException("Couldn't parse the header size from the RDY header.");
}
if (i != HeaderSize && !force)
{
throw new InvalidDataException(string.Format("The header size in the RDY file should state {0} but it was {1} instead.", HeaderSize, i));
}
if (!int.TryParse(data.Substring(12, 2), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
{
throw new InvalidDataException("Couldn't parse the record size from the RDY header.");
}
header.RecordSize = i;
// work around a known issue with v001 data (from JPR001.RDY)
if (header.TableType == 'v' && header.TableId == 1 && header.RecordSize == 96)
{
header.RecordSize = 6;
}
header.RecordCount = SynelNumericFormat.Convert(data.Substring(14, 3));
if (!int.TryParse(data.Substring(17, 2), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
{
throw new InvalidDataException("Couldn't parse the key length from the RDY header.");
}
header.KeyLength = i;
if (!int.TryParse(data.Substring(19, 2), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
{
throw new InvalidDataException("Couldn't parse the key offset from the RDY header.");
}
header.KeyOffset = i;
if (!int.TryParse(data.Substring(21, 2), NumberStyles.None, CultureInfo.InvariantCulture, out i) && !force)
{
throw new InvalidDataException("Couldn't parse the sorted/packed flags from the RDY header.");
}
header.Sorted = i == 2 || i == 3;
header.Packed = i == 1 || i == 3;
// Make sure the character count makes sense
var expectedChars = HeaderSize + header.RecordCount * header.RecordSize;
if (header.TotalCharacters != expectedChars && !force)
{
throw new InvalidDataException(string.Format("The total character count doesn't match. It was reported as {0}, but calculated as {1}.",
header.TotalCharacters, expectedChars));
}
return(header);
}
