public int AppendHeaderRecord(FitsHeaderRecord record)
{
var index = nextSequenceNumber++;
records.Add(index, record);
return(index);
}
/// <summary>
/// Creates a new <see cref="FitsHeaderRecord" /> from record text in the supplied string.
/// </summary>
/// <param name="text">The record text, which must contain exactly 80 permitted ASCII characters.</param>
/// <returns>A new instance of <see cref="FitsHeaderRecord" /> initialized from the record text.</returns>
public static FitsHeaderRecord FromRecordText(string text)
{
Contract.Requires(!string.IsNullOrEmpty(text));
Contract.Ensures(Contract.Result <FitsHeaderRecord>() != null);
Log.Info("Parsing FITS Header Record: {0}", text);
if (text.Length != 80)
{
throw new FitsFormatException(
$"Found {text.Length} characters. FITS records must contain exactly 80 characters")
{
Record = text
}
}
;
var equalsPosition = text.IndexOf(FitsFormat.EqualsCharacter);
var commentPosition = text.IndexOf(FitsFormat.CommentCharacter);
var record = new FitsHeaderRecord(text);
/*
* If the first non blank character is the comment character then the record is a comment. The
* comment text begins at the first non blank character after the comment character.
*/
if (text.TrimStart().FirstOrDefault() == FitsFormat.CommentCharacter)
{
record.Comment = ParseComment(text);
record.Keyword = string.Empty;
record.Value = string.Empty;
return(record);
}
record.Keyword = ParseKeyword(text);
if (record.Keyword.IsCommentary() || text.HasNoValue())
{
// keywords that are blank, or one of the commentary types, or which have no value
// have comment text from position 9 and no value.
record.Comment = text.RemoveHead(FitsFormat.ValueFieldPosition).TrimEnd();
record.Value = string.Empty;
}
else
{
record.Value = ParseValueField(text);
record.Comment = ParseComment(text);
}
return(record);
}
public async Task <FitsHeaderRecord> ReadHeaderRecord()
{
var rawRecord = await ReadRecord().ConfigureAwait(false);
return(FitsHeaderRecord.FromRecordText(rawRecord.Text));
}