public void AdvanceToEndOfLine()
{
while (true)
{
char c = buffer.GetNextChar(true);
if (eos)
{
break;
}
if (c == '\x0D') //'\r'
{
stream.LineNbr++;
previousWasCr = true;
// we are at the end of the line, eat newline characters and exit
eol = true;
if (c == '\x0D' && buffer.GetNextChar(false) == '\x0A')
{
// new line sequence is 0D0A
buffer.GetNextChar(true);
}
eol = false;
break;
}
}
}
public bool GetNextItem(ref string itemString, int?itemLength = null)
{
itemString = null;
if (Eol)
{
// previous item was last in line, start new line
Eol = false;
return(false);
}
var itemFound = false;
var quoted = false;
var predata = true;
var postdata = false;
var item = new StringBuilder();
var cnt = 0;
while (true)
{
if (itemLength != null && cnt >= itemLength.Value)
{
itemString = item.ToString();
return(true);
}
var c = _buffer.GetNextChar(true);
cnt++;
if (Eos)
{
if (itemFound)
{
itemString = item.ToString();
}
return(itemFound);
}
// Keep track of line number.
// Note that line breaks can happen within a quoted field, not just at the
// end of a record.
// Don't count 0D0A as two line breaks.
if ((!_previousWasCr) && (c == '\x0A'))
{
_stream.LineNbr++;
}
if (c == '\x0D') //'\r'
{
_stream.LineNbr++;
_previousWasCr = true;
}
else
{
_previousWasCr = false;
}
if ((postdata || !quoted) && (itemLength == null && c == _stream.SeparatorChar))
{
if (_stream.IgnoreTrailingSeparatorChar)
{
var nC = _buffer.GetNextChar(false);
if ((nC == '\x0A' || nC == '\x0D'))
{
continue;
}
}
// end of item, return
if (itemFound)
{
itemString = item.ToString();
}
return(true);
}
if ((predata || postdata || !quoted) && (c == '\x0A' || c == '\x0D'))
{
// we are at the end of the line, eat newline characters and exit
Eol = true;
if (c == '\x0D' && _buffer.GetNextChar(false) == '\x0A')
{
// new line sequence is 0D0A
_buffer.GetNextChar(true);
}
if (itemFound)
{
itemString = item.ToString();
}
return(true);
}
if (predata && c == ' ')
{
// whitespace preceeding data, discard
continue;
}
if (predata && c == '"')
{
// quoted data is starting
quoted = true;
predata = false;
itemFound = true;
continue;
}
if (predata)
{
// data is starting without quotes
predata = false;
item.Append(c);
itemFound = true;
continue;
}
if (c == '"' && quoted)
{
if (_buffer.GetNextChar(false) == '"')
{
// double quotes within quoted string means add a quote
item.Append(_buffer.GetNextChar(true));
}
else
{
// end-quote reached
postdata = true;
}
continue;
}
// all cases covered, character must be data
item.Append(c);
}
}
