public static DetectBit check(byte[] text, long limitlen)
{
if (IsAscii(text, limitlen))
{
return(DetectBit.ALL);
}
DetectBit detect = DetectBit.NONE;
if (IsShiftJis(text, limitlen))
{
detect |= DetectBit.ShiftJIS;
}
if (IsUtf8(text, limitlen))
{
detect |= DetectBit.UTF8;
}
return(detect);
}
public static bool IsAscii(DetectBit bit) => ((bit & DetectBit.ASCII) != 0);
public static bool IsUtf8(DetectBit bit) => ((bit & DetectBit.UTF8) != 0);
public static bool IsShiftJis(DetectBit bit) => ((bit & DetectBit.ShiftJIS) != 0);