unit ebcdic;

interface

function Ascii2Ebcdic(const s:AnsiString):AnsiString;
function Ebcdic2Ascii(const s:AnsiString):AnsiString;

implementation

const
　ATOE_TABLE:array[0..255] of Byte =
　　(
　　　$00,$01,$02,$03,$37,$2d,$2e,$2f,$16,$05,$25,$0b,$0c,$0d,$0e,$0f,
　　　$10,$11,$12,$13,$3c,$3d,$32,$26,$18,$19,$3f,$27,$1c,$1d,$1e,$1f,
　　　$40,$4f,$7f,$7b,$5b,$6c,$50,$7d,$4d,$5d,$5c,$4e,$6b,$60,$4b,$61,
　　　$f0,$f1,$f2,$f3,$f4,$f5,$f6,$f7,$f8,$f9,$7a,$5e,$4c,$7e,$6e,$6f,
　　　$7c,$c1,$c2,$c3,$c4,$c5,$c6,$c7,$c8,$c9,$d1,$d2,$d3,$d4,$d5,$d6,
　　　$d7,$d8,$d9,$e2,$e3,$e4,$e5,$e6,$e7,$e8,$e9,$4a,$e0,$5a,$5f,$6d,
　　　$79,$81,$82,$83,$84,$85,$86,$87,$88,$89,$91,$92,$93,$94,$95,$96,
　　　$97,$98,$99,$a2,$a3,$a4,$a5,$a6,$a7,$a8,$a9,$c0,$6a,$d0,$a1,$07,
　　　$20,$21,$22,$23,$24,$15,$06,$17,$28,$29,$2a,$2b,$2c,$09,$0a,$1b,
　　　$30,$31,$1a,$33,$34,$35,$36,$08,$38,$39,$3a,$3b,$04,$14,$3e,$e1,
　　　$41,$42,$43,$44,$45,$46,$47,$48,$49,$51,$52,$53,$54,$55,$56,$57,
　　　$58,$59,$62,$63,$64,$65,$66,$67,$68,$69,$70,$71,$72,$73,$74,$75,
　　　$76,$77,$78,$80,$8a,$8b,$8c,$8d,$8e,$8f,$90,$9a,$9b,$9c,$9d,$9e,
　　　$9f,$a0,$aa,$ab,$ac,$ad,$ae,$af,$b0,$b1,$b2,$b3,$b4,$b5,$b6,$b7,
　　　$b8,$b9,$ba,$bb,$bc,$bd,$be,$bf,$ca,$cb,$cc,$cd,$ce,$cf,$da,$db,
　　　$dc,$dd,$de,$df,$ea,$eb,$ec,$ed,$ee,$ef,$fa,$fb,$fc,$fd,$fe,$ff
　　);

　ETOA_TABLE:array[0..255] of Byte =
　　(
　　　$00,$01,$02,$03,$9c,$09,$86,$7f,$97,$8d,$8e,$0b,$0c,$0d,$0e,$0f,
　　　$10,$11,$12,$13,$9d,$85,$08,$87,$18,$19,$92,$8f,$1c,$1d,$1e,$1f,
　　　$80,$81,$82,$83,$84,$0a,$17,$1b,$88,$89,$8a,$8b,$8c,$05,$06,$07,
　　　$90,$91,$16,$93,$94,$95,$96,$04,$98,$99,$9a,$9b,$14,$15,$9e,$1a,
　　　$20,$a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7,$a8,$5b,$2e,$3c,$28,$2b,$21,
　　　$26,$a9,$aa,$ab,$ac,$ad,$ae,$af,$b0,$b1,$5d,$24,$2a,$29,$3b,$5e,
　　　$2d,$2f,$b2,$b3,$b4,$b5,$b6,$b7,$b8,$b9,$7c,$2c,$25,$5f,$3e,$3f,
　　　$ba,$bb,$bc,$bd,$be,$bf,$c0,$c1,$c2,$60,$3a,$23,$40,$27,$3d,$22,
　　　$c3,$61,$62,$63,$64,$65,$66,$67,$68,$69,$c4,$c5,$c6,$c7,$c8,$c9,
　　　$ca,$6a,$6b,$6c,$6d,$6e,$6f,$70,$71,$72,$cb,$cc,$cd,$ce,$cf,$d0,
　　　$d1,$7e,$73,$74,$75,$76,$77,$78,$79,$7a,$d2,$d3,$d4,$d5,$d6,$d7,
　　　$d8,$d9,$da,$db,$dc,$dd,$de,$df,$e0,$e1,$e2,$e3,$e4,$e5,$e6,$e7,
　　　$7b,$41,$42,$43,$44,$45,$46,$47,$48,$49,$e8,$e9,$ea,$eb,$ec,$ed,
　　　$7d,$4a,$4b,$4c,$4d,$4e,$4f,$50,$51,$52,$ee,$ef,$f0,$f1,$f2,$f3,
　　　$5c,$9f,$53,$54,$55,$56,$57,$58,$59,$5a,$f4,$f5,$f6,$f7,$f8,$f9,
　　　$30,$31,$32,$33,$34,$35,$36,$37,$38,$39,$fa,$fb,$fc,$fd,$fe,$ff
　　);

function Ascii2Ebcdic(const s:AnsiString):AnsiString;
var
　i:Integer;
begin
　result := '';
　for i:=1to Length(s) do
　　result := result + AnsiChar(ATOE_TABLE[Byte(s[i])]);
end;

function Ebcdic2Ascii(const s:AnsiString):AnsiString;
var
　i:Integer;
begin
　result := '';
　for i:=1to Length(s) do
　　result := result + AnsiChar(ETOA_TABLE[Byte(s[i])]);
end;

end.