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{%MainUnit ../lconvencoding.pp}
{
*****************************************************************************
This file is part of LazUtils.
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
Asian Unicode Functions.
The clipboard is able to work with the windows and gtk behaviour/features.
}
function DBCSToUTF8(const s: string; const {%H-}ArrayUni, ArrayCP: array of word; CodeP: integer): string;
const
cp936unodered:array[0..254] of Uint32=($a2ab,$a2ac,$a2ad,$a2ae,$a2af,$a2b0,$a2e3,$a2e4,$a2ef,$a2f0,$a2fd,$a2fe,$a4f4,$a4f5,$a4f6,$a4f7,$a4f8,$a4f9,$a4fa,$a4fb,$a4fc,$a4fd,$a4fe,$a5f7,$a5f8,$a5f9,$a5fa,$a5fb,$a5fc,$a5fd,$a5fe,$a6b9,$a6ba,$a6bb,$a6bc,$a6bd,$a6be,$a6bf,$a6c0,$a6d9,$a6da,$a6db,$a6dc,$a6dd,$a6de,$a6df,$a6ec,$a6ed,$a6f3,$a6f6,$a6f7,$a6f8,$a6f9,$a6fa,$a6fb,$a6fc,$a6fd,$a6fe,$a7c2,$a7c3,$a7c4,$a7c5,$a7c6,$a7c7,$a7c8,$a7c9,$a7ca,$a7cb,$a7cc,$a7cd,$a7ce,$a7cf,$a7d0,$a7f2,$a7f3,$a7f4,$a7f5,$a7f6,$a7f7,$a7f8,$a7f9,$a7fa,$a7fb,$a7fc,$a7fd,$a7fe,$a896,$a897,$a898,$a899,$a89a,$a89b,$a89c,$a89d,$a89e,$a89f,$a8a0,$a8bc,$a8bf,$a8c1,$a8c2,$a8c3,$a8c4,$a8ea,$a8eb,$a8ec,$a8ed,$a8ee,$a8ef,$a8f0,$a8f1,$a8f2,$a8f3,$a8f4,$a8f5,$a8f6,$a8f7,$a8f8,$a8f9,$a8fa,$a8fb,$a8fc,$a8fd,$a8fe,$a958,$a95b,$a95d,$a95e,$a95f,$a989,$a98a,$a98b,$a98c,$a98d,$a98e,$a98f,$a990,$a991,$a992,$a993,$a994,$a995,$a997,$a998,$a999,$a99a,$a99b,$a99c,$a99d,$a99e,$a99f,$a9a0,$a9a1,$a9a2,$a9a3,$a9f0,$a9f1,$a9f2,$a9f3,$a9f4,$a9f5,$a9f6,$a9f7,$a9f8,$a9f9,$a9fa,$a9fb,$a9fc,$a9fd,$a9fe,$d7fa,$d7fb,$d7fc,$d7fd,$d7fe,$fe50,$fe51,$fe52,$fe53,$fe54,$fe55,$fe56,$fe57,$fe58,$fe59,$fe5a,$fe5b,$fe5c,$fe5d,$fe5e,$fe5f,$fe60,$fe61,$fe62,$fe63,$fe64,$fe65,$fe66,$fe67,$fe68,$fe69,$fe6a,$fe6b,$fe6c,$fe6d,$fe6e,$fe6f,$fe70,$fe71,$fe72,$fe73,$fe74,$fe75,$fe76,$fe77,$fe78,$fe79,$fe7a,$fe7b,$fe7c,$fe7d,$fe7e,$fe80,$fe81,$fe82,$fe83,$fe84,$fe85,$fe86,$fe87,$fe88,$fe89,$fe8a,$fe8b,$fe8c,$fe8d,$fe8e,$fe8f,$fe90,$fe91,$fe92,$fe93,$fe94,$fe95,$fe96,$fe97,$fe98,$fe99,$fe9a,$fe9b,$fe9c,$fe9d,$fe9e,$fe9f,$fea0);
cp936unoderedstart:Uint32=$e766;
var
len, l,i: Integer;
Src, Dest: PChar;
c: char;
code,code1: word;
Hbyte,Lbyte:byte;
begin
if s = '' then exit('');
len := length(s);
SetLength(Result, len * 4);// Asia UTF-8 is at most 4 bytes
Src := PChar(s);
Dest := PChar(Result);
repeat
c := Src^;
Hbyte := byte(Src^);
Inc(Src);
if Ord(c) < 128 then
begin
if (c=#0) and (Src-PChar(s)>=len) then break;
Dest^ := c;
Inc(Dest);
end
else
begin
// shift-jis halfwidth
if (CodeP=932) and (c in [#$a0..#$df,#$fd..#$ff]) then
begin
code := Byte(c);
code1:= code;
end
else
begin
code := Byte(c) shl 8;
c:=Src^;
Lbyte := byte(Src^);
if (c=#0) and (Src-PChar(s)>=len) then break;
code := code + Byte(c);
code1:=code;
Inc(Src);
end;
code := ArrayUni[SearchTable(ArrayCP, code)];
if code=0 then
begin
case CodeP of
936:
begin
if (HByte>=$AA) and (HByte<=$AF) and (LByte>=$A1) and (LByte<=$FE) then
begin
code:= $e000 + (94 * (HByte-$aa)) + (LByte-$a1);
end
else
if (HByte>=$F8) and (HByte<=$FE) and (LByte>=$A1) and (LByte<=$FE) then
begin
code:= $e234 + (94 * (HByte-$f8)) + (LByte-$a1);
end
else
if (HByte>=$A1) and (HByte<=$A7) and (LByte>=$40) and (LByte<=$A0) then
begin
code:= $e4C6 + (97 * (HByte-$A1)) + (LByte-$40);
end
else
begin
for i:=0 to length(cp936unodered)-1 do
begin
if code1=cp936unodered[i] then
begin
code:=cp936unoderedstart+i;
break;
end;
end;
end;
end;
950:
begin
if (HByte>=$81) and (HByte<=$8d) and (LByte>=$40) and (LByte<=$FE) then
begin
code:= $eeb8 + (157 * (Hbyte-$81)) ;
if (Lbyte<$80) then
code:=code + (Lbyte-$40)
else
code:=code + (Lbyte-$62);
end
else
if (HByte>=$8e) and (HByte<=$a0) and (LByte>=$40) and (LByte<=$FE) then
begin
code:= $e311 + (157 * (Hbyte-$8e));
if (Lbyte<$80) then
code:=code + (Lbyte-$40)
else
code:=code + (Lbyte-$62);
end
else
if (HByte>=$c6) and (HByte<=$c8) and (LByte>=$a1) and (LByte<=$FE) then
begin
code:= $f672 + (157 * (Hbyte-$c6)) ;
if (Lbyte<$80) then
code:=code + (Lbyte-$40)
else
code:=code + (Lbyte-$62);
end
else
if (HByte>=$fa) and (HByte<=$fe) and (LByte>=$40) and (LByte<=$FE) then
begin
code:= $e000 + (157 * (Hbyte-$fa)) ;
if (Lbyte<$80) then
code:=code + (Lbyte-$40)
else
code:=code + (Lbyte-$62);
end;
end;
949:
begin
if (HByte=$c9) and (LByte>=$a1) and (LByte<=$fe) then
begin
code:= $e000 + (94 * (HByte-$c9)) + (LByte-$a1) ;
end
else
if (HByte=$fe) and (LByte>=$a1) and (LByte<=$fe) then
begin
code:= $e05e + (94 * (HByte-$fe)) + (LByte-$a1) ;
end
else
if code1=$ff then
begin
code:= $f8f7;
end;
end;
932:
begin
if (HByte>=$f0) and (HByte<=$f9) and (LByte>=$40) and (LByte<=$fc) then
begin
code:= $e000 + (188 * (HByte-$f0)) + (LByte-$40) ;
if LByte>$7f then
code:=code-1;
end
else
begin
case code1 of
$00a0:code:=$f8f0;
$00fd:code:=$f8f1;
$00fe:code:=$f8f2;
$00ff:code:=$f8f3;
end;
end;
end
else
code := 0;
end;
end;
if code>0 then
begin
l:=UnicodeToUTF8Inline(code,Dest);
inc(Dest,l);
end
else
case ConvertEncodingErrorMode of
ceemSkip:
begin end;
ceemException:
raise EConvertError.Create('Cannot convert DBCS code page to UTF8');
ceemReplace:
begin
Dest^:='?';
Inc(Dest);
end;
ceemReturnEmpty:
Exit('');
end;
end;
until false;
SetLength(Result, {%H-}PtrUInt(Dest) - PtrUInt(Result));
SetCodePage(RawByteString(Result), CP_UTF8, False);
end;
function CP936ToUTF8(const s: string): string;
begin
Result := DBCSToUTF8(s, Uni936C, CP936CC,936);
end;
function CP950ToUTF8(const s: string): string;
begin
Result := DBCSToUTF8(s, Uni950C, CP950CC,950);
end;
function CP949ToUTF8(const s: string): string;
begin
Result := DBCSToUTF8(s, Uni949C, CP949CC,949);
end;
function CP932ToUTF8(const s: string): string;
begin
Result := DBCSToUTF8(s, Uni932C, CP932CC,932);
end;
{$IfNDef UseSystemCPConv}
function UnicodeToCP936(Unicode: cardinal): integer;
begin
case Unicode of
0..127: Result := Unicode;
else
Result := CP936CU[SearchTable(Uni936U, Unicode)];
end;
end;
function UnicodeToCP950(Unicode: cardinal): integer;
begin
case Unicode of
0..127: Result := Unicode;
else
Result := CP950CU[SearchTable(Uni950U, Unicode)];
end;
end;
function UnicodeToCP949(Unicode: cardinal): integer;
begin
case Unicode of
0..127: Result := Unicode;
else
Result := CP949CU[SearchTable(Uni949U, Unicode)];
end;
end;
function UnicodeToCP932(Unicode: cardinal): integer;
begin
case Unicode of
0..127: Result := Unicode;
else
Result := CP932CU[SearchTable(Uni932U, Unicode)];
end;
end;
{$endif}
procedure InternalUTF8ToDBCS(const s: string; TargetCodePage: TSystemCodePage;
SetTargetCodePage: boolean;
{$IfNDef UseSystemCPConv}const UTF8CharConvFunc: TUnicodeToCharID;{$endif}
out TheResult: RawByteString); inline;
begin
{$ifdef UseSystemCPConv}
TheResult:=s;
SetCodePage(TheResult, TargetCodePage, True);
if not SetTargetCodePage then
SetCodePage(TheResult, CP_ACP, False);
{$else}
TheResult:=UTF8ToDBCS(s,UTF8CharConvFunc);
if SetTargetCodePage then
SetCodePage(TheResult, TargetCodePage, False);
{$endif}
end;
function UTF8ToCP932(const s: string; SetTargetCodePage: boolean): RawByteString;
begin
InternalUTF8ToDBCS(s,932,SetTargetCodePage{$IfNDef UseSystemCPConv},@UnicodeToCP932{$endif},Result);
end;
function UTF8ToCP936(const s: string; SetTargetCodePage: boolean): RawByteString;
begin
InternalUTF8ToDBCS(s,936,SetTargetCodePage{$IfNDef UseSystemCPConv},@UnicodeToCP936{$endif},Result);
end;
function UTF8ToCP949(const s: string; SetTargetCodePage: boolean): RawByteString;
begin
InternalUTF8ToDBCS(s,949,SetTargetCodePage{$IfNDef UseSystemCPConv},@UnicodeToCP949{$endif},Result);
end;
function UTF8ToCP950(const s: string; SetTargetCodePage: boolean): RawByteString;
begin
InternalUTF8ToDBCS(s,950,SetTargetCodePage{$IfNDef UseSystemCPConv},@UnicodeToCP950{$endif},Result);
end;
function UTF8ToDBCS(const s: string; const UTF8CharConvFunc: TUnicodeToCharID): string;
var
len, i, CharLen: integer;
Src, Dest: PChar;
c: char;
Unicode: longword;
begin
if s = '' then exit('');
len := length(s);
SetLength(Result, len); // DBCS needs at most space as UTF-8
Src := PChar(s);
Dest := PChar(Result);
repeat
c := Src^;
if c < #128 then
begin
if (c=#0) and (Src-PChar(s)>=len) then break;
Dest^ := c;
Inc(Dest);
Inc(Src);
end
else
begin
Unicode := UTF8CodepointToUnicode(Src, CharLen);
Inc(Src, CharLen);
i := UTF8CharConvFunc(Unicode);
//writeln(Format('%X', [i]));
if i >= 0 then
begin
if i > $ff then
begin
Dest^ := chr(i shr 8);
Inc(Dest);
Dest^ := chr(i);
end
else
Dest^ := chr(i);
Inc(Dest);
end
else
case ConvertEncodingErrorMode of
ceemSkip:
begin end;
ceemException:
raise EConvertError.Create('Cannot convert UTF8 to DBCS code page');
ceemReplace:
begin
Dest^ := '?';
Inc(Dest);
end;
ceemReturnEmpty:
Exit('');
end;
end;
until false;
//SetLength(Result, Dest - PChar(Result));
SetLength(Result, {%H-}PtrUInt(Dest) - PtrUInt(Result));
end;
|
