protected internal ZlibWrapper?DetermineWrapper(ICharSequence acceptEncoding)
{
float starQ = -1.0f;
float gzipQ = -1.0f;
float deflateQ = -1.0f;
ICharSequence[] parts = CharUtil.Split(acceptEncoding, ',');
foreach (ICharSequence encoding in parts)
{
float q = 1.0f;
int equalsPos = encoding.IndexOf('=');
if (equalsPos != -1)
{
try
{
q = float.Parse(encoding.ToString(equalsPos + 1));
}
catch (FormatException)
{
// Ignore encoding
q = 0.0f;
}
}
if (CharUtil.Contains(encoding, '*'))
{
starQ = q;
}
else if (AsciiString.Contains(encoding, GZipString) && q > gzipQ)
{
gzipQ = q;
}
else if (AsciiString.Contains(encoding, DeflateString) && q > deflateQ)
{
deflateQ = q;
}
}
if (gzipQ > 0.0f || deflateQ > 0.0f)
{
return(gzipQ >= deflateQ ? ZlibWrapper.Gzip : ZlibWrapper.Zlib);
}
if (starQ > 0.0f)
{
// ReSharper disable CompareOfFloatsByEqualityOperator
if (gzipQ == -1.0f)
{
return(ZlibWrapper.Gzip);
}
if (deflateQ == -1.0f)
{
return(ZlibWrapper.Zlib);
}
// ReSharper restore CompareOfFloatsByEqualityOperator
}
return(null);
}