private TdsToken CreateEnvChange(TokenDescriptor tokenDesc, TdsResponseStream stream, Encoding encoder, FormatToken lastFormat)
{
int len = stream.ReadShort();
int read = 0;
var changes = new List <EnvChangeToken.Change>();
while (read < len)
{
var change = new EnvChangeToken.Change();
change.Type = (EnvChangeToken.EnvType)stream.Read();
int newValLen = stream.Read();
change.NewValue = stream.ReadString(newValLen);
int oldValLen = stream.Read();
change.OldValue = stream.ReadString(oldValLen);
read += 3 + newValLen + oldValLen;
changes.Add(change);
}
return(new EnvChangeToken(tokenDesc.TokenType)
{
Changes = changes
});
}
public static void ReadFormat(FormatToken.Format f, TdsResponseStream stream)
{
var t = _types[f.Type];
if (t.FormatFormat == FormatFormat.LenOneByte || t.FormatFormat == FormatFormat.Decimal)
{
f.Len = stream.Read();
}
if (t.FormatFormat == FormatFormat.LenFourBytes || t.FormatFormat == FormatFormat.Image)
{
f.Len = stream.ReadInt();
}
if (t.FormatFormat == FormatFormat.Image)
{
int nameLen = stream.ReadShort();
f.ObjectName = stream.ReadString(nameLen);
}
if (t.FormatFormat == FormatFormat.Decimal)
{
f.Pecision = stream.Read();
f.Scale = stream.Read();
}
int localLen = stream.Read();
f.LocaleInfo = stream.ReadString(localLen);
// todo: blob
}
private TdsToken CreateTextMessage(TokenDescriptor tokenDesc, TdsResponseStream stream, Encoding encoder, FormatToken lastFormat)
{
int len = stream.ReadShort();
int msgNumber = stream.ReadInt();
int state = stream.Read();
int severity = stream.Read();
int sqlStatusLen = stream.Read();
var sqlStatus = stream.ReadBytes(sqlStatusLen);
int status = stream.Read();
int tranState = stream.ReadShort(); // discarded
int msgLen = stream.ReadShort();
var msg = stream.ReadString(msgLen);
int srvNameLen = stream.Read();
var serverName = stream.ReadString(srvNameLen);
int procNameLen = stream.Read();
var procName = stream.ReadString(procNameLen);
int lineNumber = stream.ReadShort();
return(new TextMessageToken(tokenDesc.TokenType)
{
MessageNumber = msgNumber,
State = state,
Severity = severity,
ParamsFollows = status == 1,
Message = msg,
ServerName = serverName,
ProcName = procName,
LineNumber = lineNumber,
});
}
private TdsToken CreateLoginAck(TokenDescriptor tokenDesc, TdsResponseStream stream, Encoding encoder, FormatToken lastFormat)
{
int len = stream.ReadShort();
int status = stream.Read();
var version = stream.ReadBytes(4);
int nameLen = stream.Read();
var name = stream.ReadString(nameLen);
var progVersion = stream.ReadBytes(4);
return(new LoginAckToken(tokenDesc.TokenType)
{
Succeed = status == 5,
Fail = status == 6,
Negotiate = status == 7,
TdsVersion = $"{version[0]}.{version[1]}.{version[2]}.{version[3]}",
ServerProgram = name,
ServerVersion = $"{progVersion[0]}.{progVersion[1]}.{progVersion[2]}.{progVersion[3]}",
});
}
private TdsToken CreateControl(TokenDescriptor tokenDesc, TdsResponseStream stream, Encoding encoder, FormatToken lastFormat)
{
int len = stream.ReadShort();
int read = 0;
var formats = new List <string>();
while (read < len)
{
int formatLen = stream.Read();
var format = stream.ReadString(formatLen);
read += 1 + formatLen;
formats.Add(format);
}
return(new ControlToken(tokenDesc.TokenType)
{
Formats = formats
});
}
private TdsToken CreateFormat(TokenDescriptor tokenDesc, TdsResponseStream stream, Encoding encoder, FormatToken lastFormat)
{
int len;
if (tokenDesc.Len == TokenLength.FourByteLen)
{
len = stream.ReadInt();
}
else
{
len = stream.ReadShort();
}
int numFormats = stream.ReadShort();
var formats = new List <FormatToken.Format>();
for (int i = 0; i < numFormats; i++)
{
var f = new FormatToken.Format
{
Params = tokenDesc.TokenType == TokenType.TDS_PARAMFMT || tokenDesc.TokenType == TokenType.TDS_PARAMFMT2,
};
int nameLen = stream.Read();
f.Name = stream.ReadString(nameLen);
if (tokenDesc.TokenType == TokenType.TDS_ROWFMT2)
{
int catalogNameLen = stream.Read();
f.CatalogName = stream.ReadString(catalogNameLen);
int schemaNameLen = stream.Read();
f.SchemaName = stream.ReadString(schemaNameLen);
int tableNameLen = stream.Read();
f.TableName = stream.ReadString(tableNameLen);
int columnNameLen = stream.Read();
f.ColumnName = stream.ReadString(columnNameLen);
}
if (tokenDesc.Len == TokenLength.FourByteLen)
{
f.Status = stream.ReadInt();
}
else
{
f.Status = stream.Read();
}
f.UserType = (UserDataType)stream.ReadInt();
f.Type = (TdsType)stream.Read();
TypeReader.ReadFormat(f, stream);
formats.Add(f);
}
return(new FormatToken(tokenDesc.TokenType)
{
Formats = formats,
});
}
