/// <summary>
/// Reads a line of the CSV file.
/// </summary>
/// <returns>The CSV line.</returns>
protected virtual async Task <string[]> ReadLineAsync()
{
context.RecordBuilder.Clear();
context.Row++;
context.RawRow++;
while (true)
{
if (fieldReader.IsBufferEmpty && !await fieldReader.FillBufferAsync())
{
// End of file.
if (context.RecordBuilder.Length > 0)
{
// There was no line break at the end of the file.
// We need to return the last record first.
context.RecordBuilder.Add(fieldReader.GetField());
return(context.RecordBuilder.ToArray());
}
return(null);
}
context.C = fieldReader.GetChar();
if (context.RecordBuilder.Length == 0 && ((context.C == context.ParserConfiguration.Comment && context.ParserConfiguration.AllowComments) || context.C == '\r' || context.C == '\n'))
{
await ReadBlankLineAsync();
if (!context.ParserConfiguration.IgnoreBlankLines)
{
break;
}
continue;
}
// Trim start outside of quotes.
if (context.C == ' ' && (context.ParserConfiguration.TrimOptions & TrimOptions.Trim) == TrimOptions.Trim)
{
await ReadSpacesAsync();
fieldReader.SetFieldStart(-1);
}
if (context.C == context.ParserConfiguration.Quote && !context.ParserConfiguration.IgnoreQuotes)
{
if (await ReadQuotedFieldAsync())
{
break;
}
}
else
{
if (await ReadFieldAsync())
{
break;
}
}
}
return(context.RecordBuilder.ToArray());
}