private static Hashtable SplitConnectionString(string connectionString, Hashtable synonyms)
{
Hashtable parsetable = new Hashtable();
Regex parser = s_connectionStringRegex;
const int KeyIndex = 1, ValueIndex = 2;
Debug.Assert(KeyIndex == parser.GroupNumberFromName("key"), "wrong key index");
Debug.Assert(ValueIndex == parser.GroupNumberFromName("value"), "wrong value index");
if (null != connectionString)
{
Match match = parser.Match(connectionString);
if (!match.Success || (match.Length != connectionString.Length))
{
throw ADP.ConnectionStringSyntax(match.Length);
}
int indexValue = 0;
CaptureCollection keyvalues = match.Groups[ValueIndex].Captures;
foreach (Capture keypair in match.Groups[KeyIndex].Captures)
{
string keyname = keypair.Value.Replace("==", "=").ToLowerInvariant();
string keyvalue = keyvalues[indexValue++].Value;
if (0 < keyvalue.Length)
{
{
switch (keyvalue[0])
{
case '\"':
keyvalue = keyvalue.Substring(1, keyvalue.Length - 2).Replace("\"\"", "\"");
break;
case '\'':
keyvalue = keyvalue.Substring(1, keyvalue.Length - 2).Replace("\'\'", "\'");
break;
default:
break;
}
}
}
else
{
keyvalue = null;
}
DebugTraceKeyValuePair(keyname, keyvalue, synonyms);
string realkeyname = ((null != synonyms) ? (string)synonyms[keyname] : keyname);
if (!IsKeyNameValid(realkeyname))
{
throw ADP.KeywordNotSupported(keyname);
}
{
parsetable[realkeyname] = keyvalue; // last key-value pair wins (or first)
}
}
}
return(parsetable);
}
static internal int GetKeyValuePair(string connectionString, int currentPosition, StringBuilder buffer, out string keyname, out string keyvalue)
{
int startposition = currentPosition;
buffer.Length = 0;
keyname = null;
keyvalue = null;
char currentChar = '\0';
ParserState parserState = ParserState.NothingYet;
int length = connectionString.Length;
for (; currentPosition < length; ++currentPosition)
{
currentChar = connectionString[currentPosition];
switch (parserState)
{
case ParserState.NothingYet: // [\\s;]*
if ((';' == currentChar) || Char.IsWhiteSpace(currentChar))
{
continue;
}
if ('\0' == currentChar)
{
parserState = ParserState.NullTermination; continue;
}
if (Char.IsControl(currentChar))
{
throw ADP.ConnectionStringSyntax(startposition);
}
startposition = currentPosition;
if ('=' != currentChar)
{
parserState = ParserState.Key;
break;
}
else
{
parserState = ParserState.KeyEqual;
continue;
}
case ParserState.Key: // (?<key>([^=\\s\\p{Cc}]|\\s+[^=\\s\\p{Cc}]|\\s+==|==)+)
if ('=' == currentChar)
{
parserState = ParserState.KeyEqual; continue;
}
if (Char.IsWhiteSpace(currentChar))
{
break;
}
if (Char.IsControl(currentChar))
{
throw ADP.ConnectionStringSyntax(startposition);
}
break;
case ParserState.KeyEqual: // \\s*=(?!=)\\s*
if ('=' == currentChar)
{
parserState = ParserState.Key; break;
}
keyname = GetKeyName(buffer);
if (ADP.IsEmpty(keyname))
{
throw ADP.ConnectionStringSyntax(startposition);
}
buffer.Length = 0;
parserState = ParserState.KeyEnd;
goto case ParserState.KeyEnd;
case ParserState.KeyEnd:
if (Char.IsWhiteSpace(currentChar))
{
continue;
}
{
if ('\'' == currentChar)
{
parserState = ParserState.SingleQuoteValue; continue;
}
if ('"' == currentChar)
{
parserState = ParserState.DoubleQuoteValue; continue;
}
}
if (';' == currentChar)
{
goto ParserExit;
}
if ('\0' == currentChar)
{
goto ParserExit;
}
if (Char.IsControl(currentChar))
{
throw ADP.ConnectionStringSyntax(startposition);
}
parserState = ParserState.UnquotedValue;
break;
case ParserState.UnquotedValue: // "((?![\"'\\s])" + "([^;\\s\\p{Cc}]|\\s+[^;\\s\\p{Cc}])*" + "(?<![\"']))"
if (Char.IsWhiteSpace(currentChar))
{
break;
}
if (Char.IsControl(currentChar) || ';' == currentChar)
{
goto ParserExit;
}
break;
case ParserState.DoubleQuoteValue: // "(\"([^\"\u0000]|\"\")*\")"
if ('"' == currentChar)
{
parserState = ParserState.DoubleQuoteValueQuote; continue;
}
if ('\0' == currentChar)
{
throw ADP.ConnectionStringSyntax(startposition);
}
break;
case ParserState.DoubleQuoteValueQuote:
if ('"' == currentChar)
{
parserState = ParserState.DoubleQuoteValue; break;
}
keyvalue = GetKeyValue(buffer, false);
parserState = ParserState.QuotedValueEnd;
goto case ParserState.QuotedValueEnd;
case ParserState.SingleQuoteValue: // "('([^'\u0000]|'')*')"
if ('\'' == currentChar)
{
parserState = ParserState.SingleQuoteValueQuote; continue;
}
if ('\0' == currentChar)
{
throw ADP.ConnectionStringSyntax(startposition);
}
break;
case ParserState.SingleQuoteValueQuote:
if ('\'' == currentChar)
{
parserState = ParserState.SingleQuoteValue; break;
}
keyvalue = GetKeyValue(buffer, false);
parserState = ParserState.QuotedValueEnd;
goto case ParserState.QuotedValueEnd;
case ParserState.BraceQuoteValue: // "(\\{([^\\}\u0000]|\\}\\})*\\})"
if ('}' == currentChar)
{
parserState = ParserState.BraceQuoteValueQuote; break;
}
if ('\0' == currentChar)
{
throw ADP.ConnectionStringSyntax(startposition);
}
break;
case ParserState.BraceQuoteValueQuote:
if ('}' == currentChar)
{
parserState = ParserState.BraceQuoteValue; break;
}
keyvalue = GetKeyValue(buffer, false);
parserState = ParserState.QuotedValueEnd;
goto case ParserState.QuotedValueEnd;
case ParserState.QuotedValueEnd:
if (Char.IsWhiteSpace(currentChar))
{
continue;
}
if (';' == currentChar)
{
goto ParserExit;
}
if ('\0' == currentChar)
{
parserState = ParserState.NullTermination; continue;
}
throw ADP.ConnectionStringSyntax(startposition); // unbalanced single quote
case ParserState.NullTermination: // [\\s;\u0000]*
if ('\0' == currentChar)
{
continue;
}
if (Char.IsWhiteSpace(currentChar))
{
continue;
}
throw ADP.ConnectionStringSyntax(currentPosition);
default:
throw ADP.InternalError(ADP.InternalErrorCode.InvalidParserState1);
}
buffer.Append(currentChar);
}
ParserExit:
switch (parserState)
{
case ParserState.Key:
case ParserState.DoubleQuoteValue:
case ParserState.SingleQuoteValue:
case ParserState.BraceQuoteValue:
// keyword not found/unbalanced double/single quote
throw ADP.ConnectionStringSyntax(startposition);
case ParserState.KeyEqual:
// equal sign at end of line
keyname = GetKeyName(buffer);
if (ADP.IsEmpty(keyname))
{
throw ADP.ConnectionStringSyntax(startposition);
}
break;
case ParserState.UnquotedValue:
// unquoted value at end of line
keyvalue = GetKeyValue(buffer, true);
char tmpChar = keyvalue[keyvalue.Length - 1];
if (('\'' == tmpChar) || ('"' == tmpChar))
{
throw ADP.ConnectionStringSyntax(startposition); // unquoted value must not end in quote, except for odbc
}
break;
case ParserState.DoubleQuoteValueQuote:
case ParserState.SingleQuoteValueQuote:
case ParserState.BraceQuoteValueQuote:
case ParserState.QuotedValueEnd:
// quoted value at end of line
keyvalue = GetKeyValue(buffer, false);
break;
case ParserState.NothingYet:
case ParserState.KeyEnd:
case ParserState.NullTermination:
// do nothing
break;
default:
throw ADP.InternalError(ADP.InternalErrorCode.InvalidParserState2);
}
if ((';' == currentChar) && (currentPosition < connectionString.Length))
{
currentPosition++;
}
return(currentPosition);
}
