private static IDictionary<int, Input[]> GenEquivalenceTable(CodePointEquivalenceClasses equivalenceClasses)
{
var equivalenceTable = new Dictionary<int, Input[]>();
foreach(var plane in UnicodePlanes)
{
var planeEquivalenceClasses = new Input[0x10000];
equivalenceTable.Add(plane, planeEquivalenceClasses);
var planeBits = plane << 16;
for(var planePlace = 0; planePlace < 0x10000; planePlace++)
planeEquivalenceClasses[planePlace] = equivalenceClasses.GetClass((CodePoint)(planeBits + planePlace));
}
return equivalenceTable;
}
private static bool AllEqual(Input[] planeEquivalenceClasses)
{
var value = planeEquivalenceClasses[0];
for(var i = 1; i < planeEquivalenceClasses.Length; i++)
if(value != planeEquivalenceClasses[i])
return false;
return true;
}
private static bool CanPlaceBlockAt(Input[] planeEquivalenceClasses, int block, int place, IList<Input> equivalenceTable)
{
var blockStart = block << 8;
// Since the block place could take us off the end of the equivalenceTable, we may only need to check a portion of the block
var blockPortion = Math.Min(0xFF, equivalenceTable.Count - place - 1);
var blockEnd = blockStart + blockPortion;
for(var blockChar = blockStart; blockChar <= blockEnd; blockChar++, place++)
if(equivalenceTable[place] != planeEquivalenceClasses[blockChar])
return false;
return true;
}