/// <summary>
/// Decodes the given mini string into a regular string.
/// </summary>
/// <param name="bytes">The beytes to decode.</param>
/// <returns>The string.</returns>
/// <seealso href="https://patrick-sachs.de/projekte/ministring/" />
public static string Decode(byte[] bytes)
{
StringBuilder builder = new StringBuilder();
var chars = new List <MiniChar>();
using (MemoryStream stream = new MemoryStream(bytes)) {
int byte1 = stream.ReadByte();
int byte2 = stream.ReadByte();
bool isDone = byte1 == -1;
var b = new bool[6];
int bitOffset = 0;
while (!isDone)
{
for (int i = 0; i < 6; i++)
{
b[i] = ((byte)byte1).GetBit(bitOffset);
bitOffset++;
if (bitOffset == 8)
{
byte1 = byte2;
if (byte1 == -1)
{
isDone = true;
byte1 = 0;
byte2 = -1;
}
else
{
byte2 = stream.ReadByte();
}
bitOffset = 0;
}
}
MiniChar mini = new MiniChar(b[5], b[4], b[3], b[2], b[1], b[0]);
chars.Add(mini);
}
}
MiniCharInStream inStream = new MiniCharInStream(chars);
foreach (char c in inStream)
{
builder.Append(c);
}
return(builder.ToString());
}
public IEnumerator <char> GetEnumerator()
{
using (IEnumerator <MiniChar> enmrtr = m_Chars.GetEnumerator()) {
while (enmrtr.MoveNext())
{
char simple = MiniString.GetSimpleChar(enmrtr.Current);
if (simple != '\0')
{
yield return(simple);
}
else
{
var codePoints = new MiniChar[3];
for (int i = 0; i < 3; i++)
{
if (!enmrtr.MoveNext())
{
if (i == 1)
{
yield break;
}
codePoints[i] = MiniString.GetSimpleChar('\0');
}
else
{
codePoints[i] = enmrtr.Current;
}
}
ushort codePoint = 0;
for (int i = 0; i < 16; i++)
{
// The first two bits in the first mini char are unused.
MiniChar current = codePoints[(i + 2) / 6];
bool bit = current[(i + 2) % 6 + 1];
if (bit)
{
codePoint |= (ushort)(1 << i);
}
}
yield return((char)codePoint);
}
}
}
}
/// <summary>
/// Registers the given character aswell as the mini character in both lookups.
/// </summary>
/// <param name="c">The character.</param>
/// <param name="mc">The mini character.</param>
private static void Register(char c, MiniChar mc)
{
s_ToMini.Add(c, mc);
s_ToChar.Add(mc, c);
}
/// <summary>
/// Gets the character the given mini char represents.
/// </summary>
/// <param name="c">The mini character.</param>
/// <returns>The character.</returns>
internal static char GetSimpleChar(MiniChar c)
{
return(s_ToChar[c]);
}
protected bool Equals(MiniChar other)
{
return(B1 == other.B1 && B2 == other.B2 && B3 == other.B3 && B4 == other.B4 && B5 == other.B5 && B6 == other.B6);
}
