>>636 以下 修正したコードだけど、参考まで。
function DBCSToUTF8(const s: string; CodeP: integer): string;
:
const // 半角ｶﾅ 対応
HankakuKanaUTF8Code:array[$A1..$DF] of array[1..3] of Byte
=(($EF,$BD,$A1),($EF,$BD,$A2),($EF,$BD,$A3),($EF,$BD,$A4),($EF,$BD,$A5),($EF,$BD,$A6),($EF,$BD,$A7),($EF,$BD,$A8),
($EF,$BD,$A9),($EF,$BD,$AA),($EF,$BD,$AB),($EF,$BD,$AC),($EF,$BD,$AD),($EF,$BD,$AE),($EF,$BD,$AF),($EF,$BD,$B0),
($EF,$BD,$B1),($EF,$BD,$B2),($EF,$BD,$B3),($EF,$BD,$B4),($EF,$BD,$B5),($EF,$BD,$B6),($EF,$BD,$B7),($EF,$BD,$B8),
($EF,$BD,$B9),($EF,$BD,$BA),($EF,$BD,$BB),($EF,$BD,$BC),($EF,$BD,$BD),($EF,$BD,$BE),($EF,$BD,$BF),($EF,$BE,$80),
($EF,$BE,$81),($EF,$BE,$82),($EF,$BE,$83),($EF,$BE,$84),($EF,$BE,$85),($EF,$BE,$86),($EF,$BE,$87),($EF,$BE,$88),
($EF,$BE,$89),($EF,$BE,$8A),($EF,$BE,$8B),($EF,$BE,$8C),($EF,$BE,$8D),($EF,$BE,$8E),($EF,$BE,$8F),($EF,$BE,$90),
($EF,$BE,$91),($EF,$BE,$92),($EF,$BE,$93),($EF,$BE,$94),($EF,$BE,$95),($EF,$BE,$96),($EF,$BE,$97),($EF,$BE,$98),
($EF,$BE,$99),($EF,$BE,$9A),($EF,$BE,$9B),($EF,$BE,$9C),($EF,$BE,$9D),($EF,$BE,$9E),($EF,$BE,$9F));
// ここまで
begin
:
repeat
:
begin
if (c=#0) and (Src-PChar(s)>=len) then break;
Dest^ := c;
Inc(Dest);
end
else if (CodeP = 932) and (Ord(c) >= $A1) and (Ord(c) <= $DF) then begin // 半角ｶﾅ 対応
Dest^ := Char(HankakuKanaUTF8Code[Ord(c)][1]);
Inc(Dest);
Dest^ := Char(HankakuKanaUTF8Code[Ord(c)][2]);
Inc(Dest);
Dest^ := Char(HankakuKanaUTF8Code[Ord(c)][3]);
Inc(Dest);
end // ここまで