internal static string[] ParseMultipartIdentifier(string name, string leftQuote, string rightQuote, char separator, int limit, bool removequotes, string property, bool ThrowOnEmptyMultipartName)
{
if (limit <= 0)
{
throw ADP.InvalidMultipartNameToManyParts(property, name, limit);
}
if (-1 != leftQuote.IndexOf(separator) || -1 != rightQuote.IndexOf(separator) || leftQuote.Length != rightQuote.Length)
{
throw ADP.InvalidMultipartNameIncorrectUsageOfQuotes(property, name);
}
string[] parsedNames = new string[limit]; // return string array
int stringCount = 0; // index of current string in the buffer
MPIState state = MPIState.MPI_Value; // Initalize the starting state
StringBuilder sb = new StringBuilder(name.Length); // String buffer to hold the string being currently built, init the string builder so it will never be resized
StringBuilder whitespaceSB = null; // String buffer to hold white space used when parsing nonquoted strings 'a b . c d' = 'a b' and 'c d'
char rightQuoteChar = ' '; // Right quote character to use given the left quote character found.
for (int index = 0; index < name.Length; ++index)
{
char testchar = name[index];
switch (state)
{
case MPIState.MPI_Value: {
int quoteIndex;
if (IsWhitespace(testchar)) // Is White Space then skip the whitespace
{
continue;
}
else
if (testchar == separator) // If we found a separator, no string was found, initalize the string we are parsing to Empty and the next one to Empty.
// This is NOT a redundent setting of string.Empty it solves the case where we are parsing ".foo" and we should be returning null, null, empty, foo
{
parsedNames[stringCount] = string.Empty;
IncrementStringCount(name, parsedNames, ref stringCount, property);
}
else
if (-1 != (quoteIndex = leftQuote.IndexOf(testchar))) // If we are a left quote
{
rightQuoteChar = rightQuote[quoteIndex]; // record the corresponding right quote for the left quote
sb.Length = 0;
if (!removequotes)
{
sb.Append(testchar);
}
state = MPIState.MPI_ParseQuote;
}
else
if (-1 != rightQuote.IndexOf(testchar)) // If we shouldn't see a right quote
{
throw ADP.InvalidMultipartNameIncorrectUsageOfQuotes(property, name);
}
else
{
sb.Length = 0;
sb.Append(testchar);
state = MPIState.MPI_ParseNonQuote;
}
break;
}
case MPIState.MPI_ParseNonQuote: {
if (testchar == separator)
{
parsedNames[stringCount] = sb.ToString(); // set the currently parsed string
IncrementStringCount(name, parsedNames, ref stringCount, property);
state = MPIState.MPI_Value;
}
else // Quotes are not valid inside a non-quoted name
if (-1 != rightQuote.IndexOf(testchar))
{
throw ADP.InvalidMultipartNameIncorrectUsageOfQuotes(property, name);
}
else
if (-1 != leftQuote.IndexOf(testchar))
{
throw ADP.InvalidMultipartNameIncorrectUsageOfQuotes(property, name);
}
else
if (IsWhitespace(testchar)) // If it is Whitespace
{
parsedNames[stringCount] = sb.ToString(); // Set the currently parsed string
if (null == whitespaceSB)
{
whitespaceSB = new StringBuilder();
}
whitespaceSB.Length = 0;
whitespaceSB.Append(testchar); // start to record the white space, if we are parsing a name like "foo bar" we should return "foo bar"
state = MPIState.MPI_LookForNextCharOrSeparator;
}
else
{
sb.Append(testchar);
}
break;
}
case MPIState.MPI_LookForNextCharOrSeparator: {
if (!IsWhitespace(testchar)) // If it is not whitespace
{
if (testchar == separator)
{
IncrementStringCount(name, parsedNames, ref stringCount, property);
state = MPIState.MPI_Value;
}
else // If its not a separator and not whitespace
{
sb.Append(whitespaceSB);
sb.Append(testchar);
parsedNames[stringCount] = sb.ToString(); // Need to set the name here in case the string ends here.
state = MPIState.MPI_ParseNonQuote;
}
}
else
{
whitespaceSB.Append(testchar);
}
break;
}
case MPIState.MPI_ParseQuote: {
if (testchar == rightQuoteChar) // if se are on a right quote see if we are escapeing the right quote or ending the quoted string
{
if (!removequotes)
{
sb.Append(testchar);
}
state = MPIState.MPI_RightQuote;
}
else
{
sb.Append(testchar); // Append what we are currently parsing
}
break;
}
case MPIState.MPI_RightQuote: {
if (testchar == rightQuoteChar) // If the next char is a another right quote then we were escapeing the right quote
{
sb.Append(testchar);
state = MPIState.MPI_ParseQuote;
}
else
if (testchar == separator) // If its a separator then record what we've parsed
{
parsedNames[stringCount] = sb.ToString();
IncrementStringCount(name, parsedNames, ref stringCount, property);
state = MPIState.MPI_Value;
}
else
if (!IsWhitespace(testchar)) // If it is not white space we got problems
{
throw ADP.InvalidMultipartNameIncorrectUsageOfQuotes(property, name);
}
else // It is a whitespace character so the following char should be whitespace, separator, or end of string anything else is bad
{
parsedNames[stringCount] = sb.ToString();
state = MPIState.MPI_LookForSeparator;
}
break;
}
case MPIState.MPI_LookForSeparator: {
if (!IsWhitespace(testchar)) // If it is not whitespace
{
if (testchar == separator) // If it is a separator
{
IncrementStringCount(name, parsedNames, ref stringCount, property);
state = MPIState.MPI_Value;
}
else // Othewise not a separator
{
throw ADP.InvalidMultipartNameIncorrectUsageOfQuotes(property, name);
}
}
break;
}
}
}
// Resolve final states after parsing the string
switch (state)
{
case MPIState.MPI_Value: // These states require no extra action
case MPIState.MPI_LookForSeparator:
case MPIState.MPI_LookForNextCharOrSeparator:
break;
case MPIState.MPI_ParseNonQuote: // Dump what ever was parsed
case MPIState.MPI_RightQuote:
parsedNames[stringCount] = sb.ToString();
break;
case MPIState.MPI_ParseQuote: // Invalid Ending States
default:
throw ADP.InvalidMultipartNameIncorrectUsageOfQuotes(property, name);
}
if (parsedNames[0] == null)
{
if (ThrowOnEmptyMultipartName)
{
throw ADP.InvalidMultipartName(property, name); // Name is entirely made up of whitespace
}
}
else
{
// Shuffle the parsed name, from left justification to right justification, ie [a][b][null][null] goes to [null][null][a][b]
int offset = limit - stringCount - 1;
if (offset > 0)
{
for (int x = limit - 1; x >= offset; --x)
{
parsedNames[x] = parsedNames[x - offset];
parsedNames[x - offset] = null;
}
}
}
return(parsedNames);
}