/// <summary>
/// Decodes a BEncodedString from the supplied StreamReader
/// </summary>
/// <param name="reader">The StreamReader containing the BEncodedString</param>
internal override void DecodeInternal(RawReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
int letterCount;
string length = string.Empty;
try
{
while ((reader.PeekChar() != -1) && (reader.PeekChar() != ':')) // read in how many characters
{
length += (char)reader.ReadChar(); // the string is
}
if (reader.ReadChar() != ':') // remove the ':'
{
throw new BEncodingException("Invalid data found. Aborting");
}
if (!int.TryParse(length, out letterCount))
{
throw new BEncodingException(string.Format("Invalid BEncodedString. Length was '{0}' instead of a number", length));
}
textBytes = new byte[letterCount];
if (reader.Read(textBytes, 0, letterCount) != letterCount)
{
throw new BEncodingException("Couldn't decode string");
}
}
catch (Exception ex)
{
if (ex is BEncodingException)
{
throw;
}
else
{
throw new BEncodingException("Couldn't decode string", ex);
}
}
}
/// <summary>
/// Decodes a BEncoded number from the supplied RawReader
/// </summary>
/// <param name="reader">RawReader containing a BEncoded Number</param>
internal override void DecodeInternal(RawReader reader)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
try
{
if (reader.ReadByte() != 'i') // remove the leading 'i'
{
throw new BEncodingException("Invalid data found. Aborting.");
}
int letter;
while ((letter = reader.PeekChar()) != -1 && letter != 'e')
{
// TODO: Maybe should completely use a nuget package for BEncode.
//if (letter < '0' || letter > '9')
//throw new BEncodingException("Invalid number found.");
Number = Number * 10 + (letter - '0');
reader.ReadChar();
}
if (reader.ReadByte() != 'e') //remove the trailing 'e'
{
throw new BEncodingException("Invalid data found. Aborting.");
}
}
catch (BEncodingException ex)
{
throw new BEncodingException("Couldn't decode number", ex);
}
catch
{
throw new BEncodingException("Couldn't decode number");
}
}
