private State Parse(State state, Row row)
{
var withQuotesNone = _config.WithQuotes ? 0 : 1;
var withQuotesInc = _config.WithQuotes ? 1 : 0;
while (state != State.end2)
{
if (!_currentChunk.MoveNext())
{
var remain = _currentChunk.Count - _currentChunkStart;
if (remain > 0)
{
row.AddColumnData(_currentChunk, _currentChunkStart, remain);
}
_currentChunk.Dispose();
_currentChunk = null;
_currentChunkStart = 0;
return(state);
}
var part = _currentChunk.Current;
switch (state)
{
case State.start:
switch (part.Key)
{
case Chunk.TypeEnum.quotes:
if (row.LastColumnSize > 0)
{
throw new InvalidDataException($"Data found before quotation marks, at: {_rowCnt}");
}
_currentChunkStart = part.Value + withQuotesNone;
state = State.qdata;
break;
case Chunk.TypeEnum.comma:
row.AddColumnData(_currentChunk, _currentChunkStart, part.Value - _currentChunkStart);
row.EndColumnData();
_currentChunkStart = part.Value + 1;
break;
case Chunk.TypeEnum.cr:
row.AddColumnData(_currentChunk, _currentChunkStart, part.Value - _currentChunkStart);
_currentChunkStart = part.Value + 1;
state = State.end1;
break;
case Chunk.TypeEnum.lf:
row.AddColumnData(_currentChunk, _currentChunkStart, part.Value - _currentChunkStart);
_currentChunkStart = part.Value + 1;
state = State.end2;
break;
default:
throw new InvalidOperationException($"Unexpected operand, at: {_rowCnt}");
}
break;
case State.qdata:
if (part.Key == Chunk.TypeEnum.quotes)
{
row.AddColumnData(_currentChunk, _currentChunkStart, part.Value - _currentChunkStart + withQuotesInc);
_currentChunkStart = part.Value + 1;
state = State.qdatanext;
}
break;
case State.qdatanext:
if (part.Value - _currentChunkStart != 0)
{
throw new InvalidDataException($"Unexpected data between quotes, at: {_rowCnt}");
}
switch (part.Key)
{
case Chunk.TypeEnum.comma:
row.EndColumnData();
_currentChunkStart = part.Value + 1;
state = State.start;
break;
case Chunk.TypeEnum.quotes:
_currentChunkStart = part.Value;
state = State.qdata;
break;
case Chunk.TypeEnum.cr:
_currentChunkStart = part.Value + 1;
state = State.end1;
break;
case Chunk.TypeEnum.lf:
_currentChunkStart = part.Value + 1;
state = State.end2;
break;
default:
throw new InvalidOperationException($"Unexpected operand, at: {_rowCnt}");
}
break;
case State.end1:
if (part.Key != Chunk.TypeEnum.lf || (part.Value != 0 && part.Value - _currentChunkStart != 0))
{
throw new InvalidDataException($"Unexpected data between CRLF, at: {_rowCnt}");
}
row.EndColumnData();
_currentChunkStart = part.Value + 1;
state = State.end2;
break;
default:
throw new InvalidOperationException($"Unexpected state, at: {_rowCnt}");
}
}
return(state);
}