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{%MainUnit ../lconvencoding.pp}
{******************************************************************************
Asian Unicode Functions
******************************************************************************
*****************************************************************************
This file is part of the Lazarus Component Library (LCL)
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
The clipboard is able to work with the windows and gtk behaviour/features.
}
function DBCSToUTF8(const s: string; CodeP: integer): string;
var
len: SizeInt;
Src: PChar;
Dest: PChar;
c: char;
l: Integer;
code: word;
begin
if s = '' then
begin
Result := s;
exit;
end;
len := length(s);
SetLength(Result, len * 4);// Asia UTF-8 is at most 4 bytes
Src := PChar(s);
Dest := PChar(Result);
repeat
c := 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
code := Byte(c) shl 8;
c:=Src^;
if (c=#0) and (Src-PChar(s)>=len) then break;
code := code + Byte(c);
Inc(Src);
case CodeP of
936:
code := Uni936C[SearchTable(CP936CC, code)];
950:
code := Uni950C[SearchTable(CP950CC, code)];
949:
code := Uni949C[SearchTable(CP949CC, code)];
932:
code := Uni932C[SearchTable(CP932CC, code)];
else
code := 0;
end;
if code>0 then
begin
l:=UnicodeToUTF8Inline(code,Dest);
inc(Dest,l);
end;
end;
until false;
SetLength(Result, {%H-}PtrUInt(Dest) - PtrUInt(Result));
end;
function CP936ToUTF8(const s: string): string;
begin
Result := DBCSToUTF8(s, 936);
end;
function CP950ToUTF8(const s: string): string;
begin
Result := DBCSToUTF8(s, 950);
end;
function CP949ToUTF8(const s: string): string;
begin
Result := DBCSToUTF8(s, 949);
end;
function CP932ToUTF8(const s: string): string;
begin
Result := DBCSToUTF8(s, 932);
end;
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;
function UTF8ToDBCS(const s: string;
const UTF8CharConvFunc: TUnicodeToCharID): string;
var
len: integer;
Src: PChar;
Dest: PChar;
c: char;
Unicode: longword;
CharLen: integer;
i: integer;
begin
if s = '' then
begin
Result := '';
exit;
end;
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 := UTF8CharacterToUnicode(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;
end;
until false;
//SetLength(Result, Dest - PChar(Result));
SetLength(Result, {%H-}PtrUInt(Dest) - PtrUInt(Result));
end;
function UTF8ToCP936(const s: string): string;
begin
Result := UTF8ToDBCS(s, @UnicodeToCP936);
end;
function UTF8ToCP950(const s: string): string;
begin
Result := UTF8ToDBCS(s, @UnicodeToCP950);
end;
function UTF8ToCP949(const s: string): string;
begin
Result := UTF8ToDBCS(s, @UnicodeToCP949);
end;
function UTF8ToCP932(const s: string): string;
begin
Result := UTF8ToDBCS(s, @UnicodeToCP932);
end;
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