private unsafe void UnsafeParse(char* chars, int charCount)
{
// 1 2 3 4
// 012345678901234567890123456789012345678901234
// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
if (charCount != uuidLength ||
chars[0] != 'u' || chars[1] != 'r' || chars[2] != 'n' || chars[3] != ':' ||
chars[4] != 'u' || chars[5] != 'u' || chars[6] != 'i' || chars[7] != 'd' || chars[8] != ':' ||
chars[17] != '-' || chars[22] != '-' || chars[27] != '-' || chars[32] != '-')
{
return;
}
byte* bytes = stackalloc byte[guidLength];
int i = 0;
int j = 0;
fixed (short* ps = s_char2val)
{
short* _char2val = ps;
// 0 1 2 3 4
// 012345678901234567890123456789012345678901234
// urn:uuid:aabbccdd-eeff-gghh-0011-223344556677
//
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
// ddccbbaaffeehhgg0011223344556677
i = UnsafeDecode(_char2val, chars[15], chars[16]); bytes[0] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[13], chars[14]); bytes[1] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[11], chars[12]); bytes[2] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[9], chars[10]); bytes[3] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[20], chars[21]); bytes[4] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[18], chars[19]); bytes[5] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[25], chars[26]); bytes[6] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[23], chars[24]); bytes[7] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[28], chars[29]); bytes[8] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[30], chars[31]); bytes[9] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[33], chars[34]); bytes[10] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[35], chars[36]); bytes[11] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[37], chars[38]); bytes[12] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[39], chars[40]); bytes[13] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[41], chars[42]); bytes[14] = (byte)i; j |= i;
i = UnsafeDecode(_char2val, chars[43], chars[44]); bytes[15] = (byte)i; j |= i;
if (j >= 0x100)
return;
_idLow = UnsafeGetInt64(bytes);
_idHigh = UnsafeGetInt64(&bytes[8]);
}
}
