public async Task <CsvRow> ReadRowAsync()
{
var endOfStream = false;
var rowValues = new List <string>();
if (BaseReader != null)
{
var inQuote = false;
var value = new StringBuilder();
var hasCell = false;
ColumnNumber = 0;
while (true)
{
var c = await ReadCharAsync().ConfigureAwait(false);
if (!c.HasValue)
{
endOfStream = true;
if (hasCell)
{
rowValues.Add(value.ToString());
}
RowNumber++;
break;
}
ColumnNumber++;
var next = BaseReader.Peek();
if (inQuote)
{
if (c == '\n')
{
LineNumber++;
}
else if (c == '\r')
{
if (next == '\n')
{
hasCell = true;
value.Append(c.Value);
c = await ReadCharAsync().ConfigureAwait(false);
ColumnNumber++;
}
LineNumber++;
}
if (Quote.HasValue && c == Quote)
{
if (next == Quote)
{
await ReadCharAsync().ConfigureAwait(false);
hasCell = true;
value.Append(Quote.Value);
}
else
{
inQuote = false;
}
}
else
{
hasCell = true;
value.Append(c.Value);
}
}
else if (c == '\n')
{
if (hasCell)
{
rowValues.Add(value.ToString());
}
LineNumber++;
break;
}
else if (c == '\r')
{
if (next == '\n')
{
BaseReader.Read();
ColumnNumber++;
}
if (hasCell)
{
rowValues.Add(value.ToString());
}
LineNumber++;
break;
}
else if (Quote.HasValue && c == Quote)
{
if (value.Length == 0)
{
inQuote = true;
}
else
{
hasCell = true;
value.Append(c.Value);
}
}
else if (c == Separator)
{
rowValues.Add(value.ToString());
value.Clear();
hasCell = false;
}
else
{
hasCell = true;
value.Append(c.Value);
}
}
}
if (rowValues.Count == 0 && endOfStream)
{
return(null);
}
if (HasHeaderRow && _columns == null)
{
_columns = rowValues.Select(CreateColumn).ToArray();
return(await ReadRowAsync().ConfigureAwait(false)); // Read the first row with data
}
return(CreateRow(_columns, rowValues));
}
public char PeekChar() => EndOfStream ? '\0' : Buffer.Count > 0 ? Buffer.Last() : (char)BaseReader.Peek();