public void UseConnectionParser()
{
//switch from current parser to another
ParseResult = null;
currentPacketParser = connParser;
_mysqlStreamReader.Reset();
}
//----------------------------------------------------
bool ParseErrorPacket(MySqlStreamReader reader)
{
if (!reader.Ensure(_currentHeader.ContentLength))
{
return(_needMoreData = true);
}
var errPacket = new ErrPacket(_currentHeader);
errPacket.ParsePacketContent(reader);
//
_finalResult = new MySqlErrorResult(errPacket);
_parsingState = PrepareResponseParseState.ShouldEnd;
reader.Reset();
return(true);
}
bool Parse_ColumnField_EOF(MySqlStreamReader reader)
{
if (!reader.Ensure(_currentHeader.ContentLength))
{
return(_needMoreData = true);
}
var eofPacket = new EofPacket(_currentHeader, this._isProtocol41);
eofPacket.ParsePacketContent(reader);
//
_finalResult = new MySqlPrepareResponseResult(_okPrepare, _tableHeader);
_parsingState = PrepareResponseParseState.ShouldEnd;
reader.Reset();
return(true);//finish
}
public override void Parse(MySqlStreamReader reader)
{
//reset final result
_parseResult = null;
while (!StepParse(reader))
{
;
}
//StepParse() return true if
//1. need more data or
//2. finish
reader.ClearReadBuffer();
if (_needMoreData)
{
//at any state if need more buffer
//then stop parsing and return
if (_supportPartialRelease)
{
if (_rows != null && _rows.Count > 0)
{
_parseResult = new MySqlTableResult(_tableHeader, _rows.ToArray())
{
HasFollower = true
};
}
if (_generateResultMode)
{
//generate new result
#if DEBUG
if (_rows != null)
{
}
#endif
_rows.Clear();
}
}
}
else if (_parsingState == ResultPacketState.ShouldEnd)
{
//reset
reader.Reset();
_parsingState = ResultPacketState.Header_Header;
}
}
/// <summary>
/// return ***true*** if finish or need more data
/// </summary>
/// <param name="reader"></param>
/// <returns></returns>
bool StepParse(MySqlStreamReader reader)
{
switch (_parsingState)
{
case PrepareResponseParseState.OkPrepare_Header:
return(Parse_PrepareOk_Header(reader));
case PrepareResponseParseState.OkPrepare_Content:
return(Parse_PrepareOk_Content(reader));
//------------------------------------------------
case PrepareResponseParseState.BindingField_Header:
return(Parse_BindingField_Header(reader));
case PrepareResponseParseState.BindingField_Content:
return(Parse_BindingField_Content(reader));
case PrepareResponseParseState.BindingField_EOF:
return(Parse_BindingField_EOF(reader));
//------------------------------------------------
case PrepareResponseParseState.ColumnField_Header:
return(Parse_ColumnField_Header(reader));
case PrepareResponseParseState.ColumnField_Content:
return(Parse_ColumnField_Content(reader));
case PrepareResponseParseState.ColumnField_EOF:
return(Parse_ColumnField_EOF(reader));
//------------------------------------------------
case PrepareResponseParseState.ShouldEnd:
reader.Reset();
return(true);
case PrepareResponseParseState.Error_Content:
return(ParseErrorPacket(reader));
default:
throw new Exception("unknown step?");
}
}
bool Parse_PrepareOk_Content(MySqlStreamReader reader)
{
if (!reader.Ensure(_currentHeader.ContentLength))
{
return(_needMoreData = true);
}
var okPrepare = new OkPrepareStmtPacket(_currentHeader);
okPrepare.ParsePacketContent(reader);
_okPrepare = okPrepare;
//----------------------------------------------------
_tableHeader = new TableHeader(true);
//----------------------------------------------------
//*** 3 possible way after read prepare ok header***
if (okPrepare.num_params == 0)
{
//if prepare stmt dosn't have binding parameters
if (okPrepare.num_columns > 0)
{
//has some column
_parsingState = PrepareResponseParseState.ColumnField_Header;
}
else
{
_finalResult = new MySqlPrepareResponseResult(okPrepare, _tableHeader);
_parsingState = PrepareResponseParseState.ShouldEnd;
reader.Reset();
return(true); //finish
}
}
else
{
_parsingState = PrepareResponseParseState.BindingField_Header;
}
return(false);
}
bool Parse_BindingField_EOF(MySqlStreamReader reader)
{
if (!reader.Ensure(_currentHeader.ContentLength))
{
return(_needMoreData = true);
}
var eofPacket = new EofPacket(_currentHeader, _isProtocol41);
eofPacket.ParsePacketContent(reader);
if (_okPrepare.num_columns > 0)
{
_parsingState = PrepareResponseParseState.ColumnField_Header;
return(false);
}
else
{
_finalResult = new MySqlPrepareResponseResult(_okPrepare, _tableHeader);
_parsingState = PrepareResponseParseState.ShouldEnd;
reader.Reset();
return(true);
}
}
//----------------------------------------------------
bool ParseErrorPacket(MySqlStreamReader reader)
{
if (!reader.Ensure(_currentHeader.ContentLength))
{
return _needMoreData = true;
}
var errPacket = new ErrPacket(_currentHeader);
errPacket.ParsePacketContent(reader);
//
_finalResult = new MySqlErrorResult(errPacket);
_parsingState = PrepareResponseParseState.ShouldEnd;
reader.Reset();
return true;
}
bool Parse_ColumnField_EOF(MySqlStreamReader reader)
{
if (!reader.Ensure(_currentHeader.ContentLength))
{
return _needMoreData = true;
}
var eofPacket = new EofPacket(_currentHeader, this._isProtocol41);
eofPacket.ParsePacketContent(reader);
//
_finalResult = new MySqlPrepareResponseResult(_okPrepare, _tableHeader);
_parsingState = PrepareResponseParseState.ShouldEnd;
reader.Reset();
return true;//finish
}
bool Parse_PrepareOk_Content(MySqlStreamReader reader)
{
if (!reader.Ensure(_currentHeader.ContentLength))
{
return _needMoreData = true;
}
var okPrepare = new OkPrepareStmtPacket(_currentHeader);
okPrepare.ParsePacketContent(reader);
_okPrepare = okPrepare;
//----------------------------------------------------
_tableHeader = new TableHeader(true);
//----------------------------------------------------
//*** 3 possible way after read prepare ok header***
if (okPrepare.num_params == 0)
{
//if prepare stmt dosn't have binding parameters
if (okPrepare.num_columns > 0)
{
//has some column
_parsingState = PrepareResponseParseState.ColumnField_Header;
}
else
{
_finalResult = new MySqlPrepareResponseResult(okPrepare, _tableHeader);
_parsingState = PrepareResponseParseState.ShouldEnd;
reader.Reset();
return true; //finish
}
}
else
{
_parsingState = PrepareResponseParseState.BindingField_Header;
}
return false;
}
/// <summary>
/// return ***true*** if finish or need more data
/// </summary>
/// <param name="reader"></param>
/// <returns></returns>
bool StepParse(MySqlStreamReader reader)
{
switch (_parsingState)
{
case PrepareResponseParseState.OkPrepare_Header:
return Parse_PrepareOk_Header(reader);
case PrepareResponseParseState.OkPrepare_Content:
return Parse_PrepareOk_Content(reader);
//------------------------------------------------
case PrepareResponseParseState.BindingField_Header:
return Parse_BindingField_Header(reader);
case PrepareResponseParseState.BindingField_Content:
return Parse_BindingField_Content(reader);
case PrepareResponseParseState.BindingField_EOF:
return Parse_BindingField_EOF(reader);
//------------------------------------------------
case PrepareResponseParseState.ColumnField_Header:
return Parse_ColumnField_Header(reader);
case PrepareResponseParseState.ColumnField_Content:
return Parse_ColumnField_Content(reader);
case PrepareResponseParseState.ColumnField_EOF:
return Parse_ColumnField_EOF(reader);
//------------------------------------------------
case PrepareResponseParseState.ShouldEnd:
reader.Reset();
return true;
case PrepareResponseParseState.Error_Content:
return ParseErrorPacket(reader);
default:
throw new Exception("unknown step?");
}
}
public override void Parse(MySqlStreamReader reader)
{
//reset final result
_parseResult = null;
while (!StepParse(reader)) ;
//StepParse() return true if
//1. need more data or
//2. finish
if (_needMoreData)
{
//at any state if need more buffer
//then stop parsing and return
if (_supportPartialRelease)
{
if (_rows != null && _rows.Count > 0)
{
_parseResult = new MySqlTableResult(_tableHeader, _rows) { HasFollower = true };
}
if (_generateResultMode)
{
//generate new result
_rows = new List<DataRowPacket>();
}
}
}
else if (_parsingState == ResultPacketState.ShouldEnd)
{
//reset
reader.Reset();
_parsingState = ResultPacketState.Header_Header;
}
}
