Length(screen, row, scol, ecol) register int row, scol, ecol; register TScreen *screen GCC_UNUSED;
Length( register TScreen *screen GCC_UNUSED, register int row, register int scol, register int ecol)
Length(screen, row, scol, ecol)    register int row, scol, ecol;    register TScreen *screen GCC_UNUSED;{        register int lastcol = LastTextCol(row);	if (ecol > lastcol)	    ecol = lastcol;	return (ecol - scol + 1);}