public static IEnumerable<Zchar> ReadWordsTillBreak(WordAddress address, GameMemory memory, ISet<char> breakers = null)
{
while (true)
{
Word word = memory.ReadWord(address);
Zchar low = new Zchar(Bits.FetchBits(BitNumber.Bit14, BitSize.Size5, word));
Zchar mid = new Zchar(Bits.FetchBits(BitNumber.Bit9, BitSize.Size5, word));
Zchar high = new Zchar(Bits.FetchBits(BitNumber.Bit4, BitSize.Size5, word));
yield return low;
yield return mid;
yield return high;
if (word.IsTerminal(breakers))
{
yield break;
}
address = address + 1;
}
}
private static AbbreviationNumber GetFromZcharAndState(state st, Zchar value)
{
// 32(z-1)+x
int z = 0;
switch (st)
{
case state.abbr:
z = 1;
break;
case state.abbr32:
z = 2;
break;
case state.abbr64:
z = 3;
break;
default:
throw new ArgumentException("Apparently invalid state");
}
int x = value.Value;
return new AbbreviationNumber(32 * (z - 1) + x);
}
public static IEnumerable<Zchar> ReadWordAsZchars(Word word)
{
Zchar low = new Zchar(Bits.FetchBits(BitNumber.Bit14, BitSize.Size5, word));
Zchar mid = new Zchar(Bits.FetchBits(BitNumber.Bit9, BitSize.Size5, word));
Zchar high = new Zchar(Bits.FetchBits(BitNumber.Bit4, BitSize.Size5, word));
return new Zchar[] { low, mid, high };
}