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);
}
private static StringSegment ReadSequenceNumber(StringSegment chars)
{
var separatorIndex = SipCharacters.IndexOfWhitespace(chars);
if (separatorIndex < 0)
{
return(chars);
}
return(chars.Subsegment(0, separatorIndex));
}
private static bool IsUriValid(StringSegment chars)
{
var uri = chars;
if (IsInUriBrackets(chars))
{
uri = chars.Subsegment(1, chars.Length - 2);
}
return(uri != StringSegment.Empty && SipCharacters.IsValidUri(uri));
}
private static StringSegment ReadProtocol(StringSegment chars)
{
var spaceIndex = SipCharacters.IndexOfWhitespace(chars);
if (spaceIndex == -1)
{
return(chars);
}
return(chars.Subsegment(0, spaceIndex));
}
private static bool IsProtocolValid(StringSegment protocol)
{
if (protocol == StringSegment.Empty)
{
return(false);
}
if (!SipCharacters.IsValidToken(protocol))
{
return(false);
}
return(true);
}
private bool IsValidName()
{
if (currentName == StringSegment.Empty)
{
return(false);
}
if (!SipCharacters.IsValidToken(currentName))
{
return(false);
}
return(true);
}
private static bool IsDisplayNameValid(StringSegment chars)
{
if (chars == StringSegment.Empty)
{
return(true);
}
if (SipCharacters.IsValidQuoted(chars))
{
return(true);
}
if (SipCharacters.IsValidTokenExcludeWhitespase(chars))
{
return(true);
}
return(false);
}
private bool IsValidValue()
{
if (isSingleName)
{
return(true);
}
if (currentValue == StringSegment.Empty)
{
return(false);
}
if (SipCharacters.IsValidQuoted(currentValue))
{
return(true);
}
if (!SipCharacters.IsValidToken(currentValue))
{
return(false);
}
return(true);
}
private static bool IsMethodValid(ReadOnlyMemory <char> chars)
{
return(!chars.IsEmpty && SipCharacters.IsValidToken(chars.Span));
}
private static bool IsSequenceNumberValid(StringSegment chars)
{
return(chars.Length > 0 && SipCharacters.IsDigits(chars));
}
private static bool IsHeaderNameValid(ReadOnlyMemory <char> chars)
{
return(!chars.IsEmpty && SipCharacters.IsValidField(chars.Span));
}
private static bool IsUriValid(ReadOnlyMemory <byte> bytes)
{
return(!bytes.IsEmpty && SipCharacters.IsValidUri(bytes.Span));
}
private static bool IsReasonPhraseValid(ReadOnlyMemory <byte> bytes)
{
return(!SipCharacters.HasCROrLF(bytes.Span));
}
private static bool IsStatusCodeValid(ReadOnlyMemory <byte> bytes)
{
return(bytes.Length == StatusCodeLenght && SipCharacters.IsDigits(bytes.Span));
}
private static bool IsMethodValid(ReadOnlyMemory <byte> bytes)
{
return(!bytes.IsEmpty && SipCharacters.IsValidToken(bytes.Span));
}
private static bool IsHostValid(StringSegment host)
{
return(host != StringSegment.Empty && SipCharacters.IsValidHost(host));
}
private static bool IsMethodValid(StringSegment chars)
{
return(chars.Length > 0 && SipCharacters.IsValidToken(chars));
}
private static bool IsUriValid(ReadOnlyMemory <char> chars)
{
return(!chars.IsEmpty && SipCharacters.IsValidUri(chars.Span));
}
