private bool TryReadQuotedValue(out int startIndex, out int length)
{
startIndex = -1;
length = 0;
if (remainingChars == StringSegment.Empty)
{
return(false);
}
startIndex = SipCharacters.IndexOfNonWhitespace(remainingChars);
if (startIndex < 0)
{
return(false);
}
if (remainingChars[startIndex] != QuoteChar)
{
return(false);
}
var endQuoteCharIndex = SipCharacters.IndexOfNonEscaped(remainingChars, QuoteChar, startIndex + 1);
if (endQuoteCharIndex < 0)
{
return(false);
}
length = endQuoteCharIndex - startIndex;
return(true);
}
private static bool TryReadQuotedDisplayName(StringSegment chars, out int startIndex, out int length)
{
startIndex = -1;
length = 0;
if (chars == StringSegment.Empty)
{
return(false);
}
startIndex = SipCharacters.IndexOfNonWhitespace(chars);
if (startIndex < 0)
{
return(false);
}
if (chars[startIndex] != QuoteChar)
{
return(false);
}
var endQuoteCharIndex = SipCharacters.IndexOfNonEscaped(chars, QuoteChar, startIndex + 1);
if (endQuoteCharIndex < 0)
{
return(false);
}
length = endQuoteCharIndex - startIndex;
return(true);
}