On 3/23/14, 9:49 PM, Michel Fortin wrote:
dchar front(char[] s)
{
if (s[0] < 0b1000000)
return s[0]; // ASCII
// pattern indicator tailLength
// 0b1100xxxx 0b00 (0) 1
// 0b1101xxxx 0b01 (1) 1 == indicator
// 0b1110xxxx 0b10 (2) 2 == indicator
// 0b1111xxxx 0b11 (3) 3 == indicator
// note: undefined result for illegal 0b11111xxx case
auto indicator = (s[0] >> 4) & 0b11;
auto tailLength = indicator ? indicator : 1;
dchar result = s[0] & (0b00111111 >> tailLength);
foreach (i; 0..tailLength)
result = (result << 6) | (s[1+i] & 0b00111111);
return result;
}
http://goo.gl/y9EVFr
Andrei
