public static IEnumerable <CharacterInfo> GetCharacters(string s)
{
var bytes = UTF32.GetBytes(s);
for (int i = 0; i < bytes.Length; i += 4)
{
var cp = new CharacterInfo();
var utf32 = new byte[4];
Array.Copy(bytes, i, utf32, 0, 4);
cp.utf32 = utf32;
cp.codePoint = (utf32[0] << 0)
| (utf32[1] << 8)
| (utf32[2] << 16)
| (utf32[3] << 24);
var decoded = UTF32.GetString(utf32);
cp.@char = decoded;
cp.utf16 = Unicode.GetBytes(decoded);
cp.utf8 = UTF8.GetBytes(decoded);
yield return(cp);
}
}
private static UnicodeCategory GetUnicodeCategory(int codePoint, byte[] buffer)
{
buffer[0] = unchecked ((byte)(codePoint >> 0));
buffer[1] = unchecked ((byte)(codePoint >> 8));
buffer[2] = unchecked ((byte)(codePoint >> 16));
buffer[3] = unchecked ((byte)(codePoint >> 24));
var s = UTF32.GetString(buffer);
var c = char.GetUnicodeCategory(s, 0);
return(c);
}
/// <summary>
/// Converts the string into UTF-32 bytes and passes them to the hashing algorithm.
/// </summary>
/// <param name="str">the string to add to the signature by passing it to the hashing algorithm.</param>
/// <returns>this task signer.</returns>
/// <remarks>
/// This method uses UTF-32 because it has fixed character width. This way we can use buffers to digest
/// the string piecewise. Otherwise we would have to allocate new byte arrays for each string.
/// </remarks>
public Sha256Signer Digest(string str)
{
var blockMaxCharCount = buffer.Length >> 2;
var strLength = str.Length;
for (int charsDigested = 0; charsDigested < strLength; charsDigested += blockMaxCharCount)
{
var bytes = UTF32.GetBytes(str, charsDigested, Min(blockMaxCharCount, strLength - charsDigested), buffer, 0);
hashAlgorithm.TransformBlock(buffer, 0, bytes, null, 0);
}
return(this);
}
///<summary>
/// Get with encoding from Bytes
///</summary>
public static string FromBytes(this byte[] bytes, string encoding = "Unicode")
{
if (Comparison(encoding, "UTF-8"))
{
return(UTF8.GetString(bytes));
}
else if (Comparison(encoding, "UTF-32"))
{
return(UTF32.GetString(bytes));
}
else if (Comparison(encoding, "ASCII"))
{
return(ASCII.GetString(bytes));
}
return(Unicode.GetString(bytes));
}
///<summary>
/// Specify Encoding for Bytes from a string
///</summary>
public static byte[] ToBytes(this string source, string encoding = "Unicode")
{
if (Comparison(encoding, "UTF-8"))
{
return(UTF8.GetBytes(source));
}
else if (Comparison(encoding, "UTF-32"))
{
return(UTF32.GetBytes(source));
}
else if (Comparison(encoding, "ASCII"))
{
return(ASCII.GetBytes(source));
}
return(Unicode.GetBytes(source));
}
/// <summary>
/// Internal text encoder.
/// </summary>
/// <param name="text">Text to encode.</param>
/// <param name="encodedByte">Callback with the byte encoded.</param>
void EncodeText(string text, Action <Stream, byte> encodedByte)
{
using (var stream = new MemoryStream(UTF32.GetBytes(text))) {
EncodeText(stream, encodedByte);
}
}
public override int GetMaxCharCount(int byteCount)
{
return(UTF32.GetMaxCharCount(byteCount));
}
public override int GetCharCount(byte[] bytes, int index, int count)
{
return(UTF32.GetCharCount(MapAll(bytes), index << 2, count << 2));
}
public override int GetChars(byte[] bytes, int byteIndex, int byteCount, char[] chars, int charIndex)
{
return(UTF32.GetChars(MapAll(bytes), byteIndex << 2, byteCount << 2, chars, charIndex));
}
static byte GetUtf32HexNumber(Stream stream)
{
byte[] buffer = new byte[4 * 2];
stream.Read(buffer, 0, buffer.Length);
return(System.Convert.ToByte(UTF32.GetString(buffer), 16));
}
byte[] GetControlBytes(Stream stream, byte current)
{
if (current != 0x2F || stream.Position >= stream.Length)
{
return new[] { current }
}
;
byte[] dummy = new byte[4];
stream.Read(dummy, 0, dummy.Length);
if (dummy[0] != 0x5B || dummy[1] != 0 || dummy[2] != 0 || dummy[3] != 0x00)
{
stream.Position -= 4;
return(new[] { current });
}
byte[] buffer = new byte[5 * 4];
stream.Read(buffer, 0, buffer.Length);
string token = UTF32.GetString(buffer);
stream.Position += 4; // (
byte[] control = { current };
switch (token)
{
case "unk03":
stream.Position += 8; // 0x
control = new byte[] { 0x0D, GetUtf32HexNumber(stream) };
break;
case "unk01":
stream.Position += 8; // 0x
control = new byte[] { 0x15, GetUtf32HexNumber(stream) };
break;
case "unk02":
stream.Position += 8; // 0x
control = new byte[] { 0x04, GetUtf32HexNumber(stream) };
break;
case "color":
stream.Position += 8; // 0x
control = new byte[] {
0x0C,
GetUtf32HexNumber(stream), GetUtf32HexNumber(stream), GetUtf32HexNumber(stream)
};
break;
case "unk04":
stream.Position += 8; // 0x
control = new byte[] {
0x08,
GetUtf32HexNumber(stream), GetUtf32HexNumber(stream), GetUtf32HexNumber(stream)
};
break;
case "unk05":
stream.Position += 8; // 0x
control = new byte[] { 0x18, GetUtf32HexNumber(stream) };
break;
case "unk06":
stream.Position += 8; // 0x
control = new byte[] { 0x12, GetUtf32HexNumber(stream), GetUtf32HexNumber(stream) };
break;
case "unk07":
stream.Position += 8; // 0x
control = new byte[] { 0x19, GetUtf32HexNumber(stream) };
break;
case "unk08":
stream.Position += 8; // 0x
control = new byte[] { 0x05, GetUtf32HexNumber(stream) };
break;
case "unk09":
stream.Position += 8; // 0x
control = new byte[] {
0x0F,
GetUtf32HexNumber(stream), GetUtf32HexNumber(stream), GetUtf32HexNumber(stream)
};
break;
case "unk0A":
stream.Position += 8; // 0x
control = new byte[] { 0x1E, GetUtf32HexNumber(stream) };
break;
case "unk0B":
stream.Position += 8; // 0x
control = new byte[] { 0x1F };
break;
}
stream.Position += 4; // )
stream.Position += 4; // ]
return(control);
}
