public static FmtItem[] CreateItemArr(int cols)
{
FmtItem[] states = new FmtItem[cols];
for (int i = 0; i < cols; i++)
{
states[i] = new FmtItem('e');
}
return(states);
}
private static void fmtCache(
object[,] fmtObjArr
)
{
int rows = fmtObjArr.GetLength(0);
int cols = fmtObjArr.GetLength(1);
lock (fmtLock)
{
// crc and cache a scan of the format row
fmtStringBuilder.Clear();
for (int col = 0; col < cols; col++)
{
fmtStringBuilder.Append((string)(fmtObjArr[0, col]));
}
var crc = Crc32.Compute(Encoding.ASCII.GetBytes(fmtStringBuilder.ToString()));
if (fmtCRC != crc)
{
// reparse the format row as it has changed
fmtCRC = crc;
if (fmtArr.Length != cols)
{
fmtArr = FmtItem.CreateItemArr(cols);
}
fmtParser.SetCols(cols);
fmtParser.SetStateArr(fmtArr);
fmtExtractor.SetStateArr(fmtArr);
for (int col = 0; col < cols; col++)
{
var fmtStr = (string)(fmtObjArr[0, col]);
char[] fmtCharArr = fmtStr.ToCharArray();
Array.Reverse(fmtCharArr); // make operators postfix and numbers least-significant-first
fmtParser.Parse(fmtCharArr);
}
}
}
}