delphi Is1251Char

function Is1251Char(Char: WideChar): Boolean;

// a little trick: set cannot contain numbers over 255 but UTF-8 encoded

// Russian characters have codes greater than 1000 and some of them are

// greater than 8000

const

Charset1000 = [25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40,

41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58,

59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76,

77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94,

95, 96, 97, 98, 99, 100, 101, 102, 103, 105, 106, 107, 108, 109, 110, 111,

112, 113, 114, 115, 116, 118, 119, 168, 169];

Charset8000 = [211, 212, 216, 217, 218, 220, 221, 222, 224, 225, 226, 230,

240, 249, 250];

Charset8300 = [64, 170, 182];

begin

Result := (Ord(Char) - 1000 in Charset1000) or (Ord(Char) - 8000 in

Charset8000) or (Ord(Char) - 8300 in Charset8300);

end;

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