internal void NextRow(ref ReaderStep step)
{
++Row;
Col = 0;
Start = End + 1;
step = ReaderStep.Start;
}
/// <summary>
/// 枚举内容
/// </summary>
/// <returns></returns>
public IEnumerable <ReaderItem> Read()
{
if (!string.IsNullOrEmpty(content))
{
ReaderItem item = new ReaderItem {
Reader = this
};
int index = 0;
ReaderStep step = ReaderStep.Start;
foreach (char code in content)
{
switch (step)
{
case ReaderStep.Start:
if (code == colSplit)
{
item.End = index;
yield return(item);
item.NextCol(ref step);
}
else if (code == rowSplit)
{
item.End = index;
yield return(item);
item.NextRow(ref step);
}
else if (code == rowIgnoreSplit)
{
step = ReaderStep.RowIgnore;
}
else if (code == escape)
{
step = ReaderStep.Escape;
}
else
{
step = ReaderStep.Next;
}
break;
case ReaderStep.Next:
if (code == colSplit)
{
item.End = index;
yield return(item);
item.NextCol(ref step);
}
else if (code == rowSplit)
{
item.End = index;
yield return(item);
item.NextRow(ref step);
}
else if (code == rowIgnoreSplit)
{
step = ReaderStep.RowIgnore;
}
break;
case ReaderStep.RowIgnore:
if (code == colSplit)
{
item.End = index;
yield return(item);
item.NextCol(ref step);
}
else if (code == rowSplit)
{
item.End = index - 1;
yield return(item);
item.NextIgnoreRow(ref step);
}
else
{
step = ReaderStep.Next;
}
break;
case ReaderStep.Escape:
if (code == escape)
{
step = ReaderStep.NextEscape;
}
break;
case ReaderStep.NextEscape:
if (code == colSplit)
{
item.End = index;
yield return(item);
item.NextCol(ref step);
}
else if (code == rowSplit)
{
item.End = index;
yield return(item);
item.NextRow(ref step);
}
else if (code == escape)
{
step = ReaderStep.Escape;
}
else if (code == rowIgnoreSplit)
{
step = ReaderStep.EscapeRowIgnore;
}
else
{
item.Error(index);
goto RETURN;
}
break;
case ReaderStep.EscapeRowIgnore:
if (code == rowSplit)
{
item.End = index - 1;
yield return(item);
item.NextIgnoreRow(ref step);
}
else
{
item.Error(index);
goto RETURN;
}
break;
}
++index;
}
item.End = index;
RETURN:
yield return(item);
}
}
internal void NextCol(ref ReaderStep step)
{
++Col;
Start = End + 1;
step = ReaderStep.Start;
}
