added function for normalising quoted strings

	boost::match_results<iterator>	mResults;

};

void normalise_quoted_string (Charstring& cs) throw (DecodeError)

{

	std::string result;

	//FIXME: how LWS shall be normalised ?

	const unsigned char* p   = cs.GetValueBin();

	const unsigned char* end = p + (cs.GetLength() / 8);

	for ( ; p!=end ; p++)

	{

		switch (*p) {

		case '\r':

		case '\n':

		case ' ':

		case 0x21:

			// plain text

			result += *p;

			break;

		case '\\':

			// escaped character

			p++;

			if ((p == end) || ((*p == '\r') | (*p == '\n'))) {

				// cannot be escaped

				// (should never happen since we checked it wit a regex before)

				DecodeError e (&cs);

				e.Msg() << "Invalid escaped sequence in quoted string: \\\\x" << std::hex << ((int) *p) << std::endl;

				throw e;

			}

			// valid escaped character

			result += *p;

			break;

		default:

			if ((*p >= 0x23) && (*p <= 0x7e))

			{

				// plain text

				result += *p;

			} else if (*p > 127) {

				// UTF-8 character

				//

				// FIXME: how to represent UTF-8 chars ? ('%xx' escape sequences are not used here)

				result += *p;

			} else {

				// non allowed character

				// (should never happen since we checked it wit a regex before)

				DecodeError e (&cs);

				e.Msg() << "Invalid character in quoted string: \\x" << std::hex << ((int) *p) << std::endl;

				throw e;

			}

		}

	}

	// replace the string with the quoted string

	Bytestring& bs = cs;

	bs.SetValue (result);

}

//WSP: space, htab, vtab, form feed

#define SIPCHARS_WSP		" \t\v\f"

#define SIPREG_LWS		"(?:[" SIPCHARS_WSP "]*\\r\\n)?[" SIPCHARS_WSP "]+"