/// <summary>
///
/// </summary>
/// <param name="resbuf"></param>
/// <returns></returns>
public override List <int> ReadSplitLine(StringBuilder resbuf = null)
{
bool esc = false;
bool seqst = true;
char prev = '\0';
var pos = new Pointer();
this.oneLineBuffer.Clear();
var res = new List <int>();
res.Add(0);
while (true)
{
if (this.charIndex <= 0)
{
this.charIndex = this.innerStream.ReadBlock(this.charBuffer, 0, this.charBuffer.Length);
if (this.charIndex <= 0)
{
break;
}
}
for (int i = 0; i < this.charIndex; ++i)
{
char c = this.charBuffer[i];
switch (c)
{
case ',':
resbuf?.Append(c);
if (!esc)
{
pos.AjustLine(this.oneLineBuffer);
res.Add(this.oneLineBuffer.Count);
pos.srcStart = this.oneLineBuffer.Count;
pos.dstStart = pos.srcStart;
seqst = true;
}
else
{
seqst = false;
}
break;
case '"':
resbuf?.Append(c);
seqst = false;
if (esc)
{
esc = false;
}
else
{
if (pos.srcStart == pos.srcEnd)
{
esc = true;
}
else if (prev == '"')
{
this.oneLineBuffer.Add('"');
esc = true;
}
}
pos.dstEnd = this.oneLineBuffer.Count;
break;
case '\n':
seqst = false;
if (prev == '\r')
{
this.oneLineBuffer.RemoveAt(this.oneLineBuffer.Count - 1);
pos.srcEnd--;
if (resbuf != null)
{
resbuf.Remove(resbuf.Length - 1, 1);
}
}
if (esc)
{
if (prev == '\r')
{
this.oneLineBuffer.Add(prev);
resbuf?.Append(prev);
}
this.oneLineBuffer.Add(c);
resbuf?.Append(c);
}
else
{
var clen = this.charIndex - (i + 1);
Array.Copy(this.charBuffer, i + 1, this.charBuffer, 0, clen);
this.charIndex = clen;
pos.AjustLine(this.oneLineBuffer);
res.Add(this.oneLineBuffer.Count);
return(res);
}
pos.dstEnd = this.oneLineBuffer.Count;
break;
default:
resbuf?.Append(c);
this.oneLineBuffer.Add(c);
if (char.IsWhiteSpace(c))
{
if (seqst)
{
pos.dstStart++;
}
}
else
{
seqst = false;
pos.dstEnd = this.oneLineBuffer.Count;
}
pos.srcEnd = this.oneLineBuffer.Count;
break;
}
prev = c;
}
this.charIndex = 0;
// 改行エスケープがあれば次を取り込む
if (this.innerStream.Peek() == -1)
{
break;
}
}
return(res);
}