public static int GetUpperBound(this RencodeTypeCode @this)
{
switch (@this)
{
case RencodeTypeCode.String:
return(RencodeConst.StringTypeCount);
case RencodeTypeCode.EncodedLengthString:
return(RencodeConst.EncodedLengthStringMaxLength);
case RencodeTypeCode.EncodedPositiveInteger:
return(RencodeConst.EncodedPositiveIntegerUpperBound);
case RencodeTypeCode.EncodedNegativeInteger:
return(RencodeConst.EncodedNegativeIntegerUpperBound);
case RencodeTypeCode.EncodedLengthList:
return(RencodeConst.EncodedLengthListMaxLength);
case RencodeTypeCode.EncodedLengthDictionary:
return(RencodeConst.EncodedLengthDictionaryMaxLength);
}
throw new InvalidOperationException($"{@this} does not have an upper bound");
}
public void ReaderPeekTypecode()
{
using var stringStream = new MemoryStream(Util.GetBytes("0:1: 2: 3: 4: 5: 6: 7: 8: 9: "));
using var stringReader = new RencodeReader(stringStream);
RencodeTypeCode typeCode;
while ((typeCode = stringReader.PeekTypeCode()) != RencodeTypeCode.EndOfStream)
{
Assert.AreEqual(RencodeTypeCode.String, typeCode);
stringReader.ReadString();
}
var strings = new string[] {
(char)RencodeTypeCode.SByte + "\x78",
(char)RencodeTypeCode.Int16 + "\x06\x04",
(char)RencodeTypeCode.Int32 + "\x7f\xff\xff\xd0",
(char)RencodeTypeCode.Int64 + "\x7F\xFF\xFF\xFF\xFF\xFE\xD7\xE0"
};
var s = string.Concat(strings);
using var intStream = new MemoryStream(Util.GetBytes(s));
using var intReader = new RencodeReader(intStream);
int i = 0;
while ((typeCode = intReader.PeekTypeCode()) != RencodeTypeCode.EndOfStream)
{
RencodeTypeCode expectedTypeCode = (RencodeTypeCode)strings[i++][0];
Assert.AreEqual(expectedTypeCode, typeCode);
intReader.Read();
}
}
private RencodeTypeCode ReadTypeCode(RencodeTypeCode expected)
{
RencodeTypeCode typeCode = ReadTypeCode();
if (typeCode == expected)
{
return(typeCode);
}
if (typeCode == RencodeTypeCode.EndOfStream)
{
throw new EndOfStreamException();
}
throw new FormatException("The stream is corrupted");
}
public static bool IsWithinBounds(this RencodeTypeCode @this, int value)
{
int start = (int)@this;
return(value >= start && value < start + @this.GetUpperBound());
}
