U_KEYMAP.PAS

{/////////////////////////////////////////////////////////////////////////
//
//  Dos Navigator Open Source 1.51.08
//  Based on Dos Navigator (C) 1991-99 RIT Research Labs
//
//  This programs is free for commercial and non-commercial use as long as
//  the following conditions are aheared to.
//
//  Copyright remains RIT Research Labs, and as such any Copyright notices
//  in the code are not to be removed. If this package is used in a
//  product, RIT Research Labs should be given attribution as the RIT Research
//  Labs of the parts of the library used. This can be in the form of a textual
//  message at program startup or in documentation (online or textual)
//  provided with the package.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//  1. Redistributions of source code must retain the copyright
//     notice, this list of conditions and the following disclaimer.
//  2. Redistributions in binary form must reproduce the above copyright
//     notice, this list of conditions and the following disclaimer in the
//     documentation and/or other materials provided with the distribution.
//  3. All advertising materials mentioning features or use of this software
//     must display the following acknowledgement:
//     "Based on Dos Navigator by RIT Research Labs."
//
//  THIS SOFTWARE IS PROVIDED BY RIT RESEARCH LABS "AS IS" AND ANY EXPRESS
//  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
//  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
//  DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
//  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
//  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
//  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
//  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
//  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
//  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
//  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//  The licence and distribution terms for any publically available
//  version or derivative of this code cannot be changed. i.e. this code
//  cannot simply be copied and put under another distribution licence
//  (including the GNU Public Licence).
//
//////////////////////////////////////////////////////////////////////////}

unit U_KeyMap;
{<U_KeyMap.001>}

interface

uses
  Objects2, Defines, Advance1
  ;

type
  TKeyMap = (kmXlat, kmNone, kmAscii, kmAnsi,
    kmKoi8r, km5, km6, km7, km8, km9);
  {`kmXlat ¨ kmNone ¤®«¦­ë ¡ëâì ¯¥à¥¤ kmAscii,  
  ®áâ «ì­ë¥ - ¯®á«¥ kmAscii`}

type
  PCodeConv = ^TCodeConv;
  TCodeConv = record
    A, B: Char
    end;

var
  RollKeyMap: array[TKeyMap] of TKeyMap;
  {` Š®¤ á«¥¤ãî騩 ¯® ªàã£ã ¢áâ஥­­®© â ¡«¨æë `}
  MaxKeyMap: TKeyMap;
  {` Œ ªá¨¬ «ì­ë© ­®¬¥à ãáâ ­®¢«¥­­®© ¯¥à¥ª®¤¨à®¢®ç­®© â ¡«¨æë.`}

type
  {(c) SeYKo}
  TCodePageDetector = object(TObject)
    procedure CheckString(P1: PChar; len: Integer);
    function DetectedCodePage: TKeyMap;
  private
    Koi, KoiA, Win, WinA, Win2: LongInt;
    end;
  {(c) SeYKo}

const
  ToUpAscii = 0;
    {` ˆ­¤¥ªá ¤«ï TXLatCP - ¯¥à¥ª®¤¨à®¢ª  ¢ ASCII c
    ¯¥à¥¢®¤®¬ ­  ¢¥àå­¨© ॣ¨áâà. ˆá¯®ì§ã¥âáï ¯à¨ à¥£¨áâà®­¥§ ¢¨á¨¬®¬
    ¯®¨áª¥. (0 = ord(False))`}
  ToAscii = 1;
    {` ˆ­¤¥ªá ¤«ï TXLatCP - ¯¥à¥ª®¤¨à®¢ª  ¢ ASCII. (1 = ord(True))`}
  FromAscii = 2;
    {` ˆ­¤¥ªá ¤«ï TXLatCP, ¯¥à¥ª®¤¨à®¢ª  ¨§ ASCII`}

type
  PXlatCP = ^TXLatCP;
  TXlatCP = array[0..2] of TXLat;

  TKeyMapDescr = record
    {` Ž¯¨á â¥«ì ª®¤¨à®¢ª¨}
    Tag: string[3];
      {` Ž¡®§­ ç¥­¨¥ ¤«ï ¯®ª §  ¢ à ¬ª¥ ®ª­ . Ž¡ï§ â¥«ì­® ¡ãª¢ë
      ⮫쪮  ­£«¨©áª¨¥ ⮫쪮 ­  ¢¥àå­¥¬ ॣ¨áâà¥!
      ‘¬. ProcessDefCodepage `}
    XlatCP: PXlatCP;
    end;
    {`}

var
  ToggleCaseArray: TXlat;
    {` ¥à¥¢®à®â ॣ¨áâà  ¢ ASCII, ⨯  "cAPS lOCK" <-> "Caps Lock"`}
  LayoutConvXlat: TXLat;
    {` ˆá¯à ¢«¥­¨¥ à áª« ¤ª¨
  „«ï á«ãç ï ¤¢ãå à áª« ¤®ª ª« ¢¨ âãàë (­ ¯à¨¬¥à, 866 ¨ 850)
  ¯¥à¥ª®¤¨àã¥â ª ¦¤ë© ᨬ¢®« ¢ â ª®©, ª ª®© ¡ë« ¡ë ¢¢¥¤¥­ á ⮩
  ¦¥ ª« ¢¨è¨ ¢ ¤à㣮© à áª« ¤ª¥.
  Ž¯à¥¤¥«ï¥âáï xlt-ä ©«®¬, § ¤ ­­ë¬ ini-¯¥à¥¬¥­­®© KbdToggleLayout `}

  ABCSortXlat: TXLat;
    {' ’ ¡«¨æ  ¢¥á®¢ ¤«ï  «ä ¢¨â­®© á®àâ¨à®¢ª¨; ¡¥§ ®¤¨­ ª®¢ëå ¢¥á®¢ '}

  DosXlatCP: TXLatCP absolute UpCaseArray;
  WinXlatCP: TXLatCP;

const
  KeyMapDescr: array[TKeyMap] of TKeyMapDescr =
   {`‚áâ஥­­ë¥ ª®¤¨à®¢ª¨ `}
    ((Tag: 'DOS'; XlatCP: @DosXlatCP) //kmXlat
    ,(Tag: 'DOS'; XlatCP: @DosXlatCP) //kmNone
    ,(Tag: 'DOS'; XlatCP: @DosXlatCP) //kmAscii
    ,(Tag: 'WIN'; XlatCP: @WinXlatCP) //kmAnsi
    ,(Tag: ''; XlatCP: nil)
    ,(Tag: ''; XlatCP: nil)
    ,(Tag: ''; XlatCP: nil)
    ,(Tag: ''; XlatCP: nil)
    ,(Tag: ''; XlatCP: nil)
    ,(Tag: ''; XlatCP: nil)
    );

function ProcessDefCodepage(DefCodepageS: String): TKeyMap;

procedure NullXLAT(var X: TXlat);
  {` ‡ ¯®«­¨âì ®â¦¤¥á⢥­­ãî ¯¥à¥ª®¤¨à®¢ªã `}

procedure AcceptToAscii(var XLatCP: TXLatCP);
  {` ‚ XLatCP ­  ®á­®¢¥ £®â®¢®© â ¡«¨æë [ToAscii] § ¯®«­¨âì ®áâ «ì­ë¥ `}

function ReadXlt(FN: string; var N: Integer): PCodeConv;
  {` à®ç¨â âì xlt-ä ©«.  ¬ïâì ¯®¤ १ã«ìâ â १¥à¢¨àã¥âáï.
  N - ¤«¨­  ¯à®ç¨â ­­®£® ä ©« . …᫨ ¯à®ç¨â âì ­¥ 㤠«®áì,
  १ã«ìâ â nil,   N = 0 `}

procedure ConvToXlat(Conv: PCodeConv; L: Integer; var Xlat: TXLat);
  {` à¥®¡à §®¢ ­¨¥ PCodeConv ¤«¨­®© L ¢ Xlat.  ç «ì­®¥ § ¯®«­¥­¨¥
  XLat ¤®«¦­  ᤥ« âì ¢ë§ë¢ îé ï ¯à®£à ¬¬ . Conv ®á¢®¡®¦¤ ¥âáï.`}

function BuildCodeTable(const S: string; var XlatCP: TXLatCP): Boolean;
  {` ‘âநâáï XlatCP ¤«ï ª®¤¨à®¢ª¨ S. S ¬®¦¥â ¯à¥¤áâ ¢«ïâì ᮡ®©
  «¨¡® ç¨á«® (⮣¤  íâ® ­®¬¥à ª®¤®¢®© áâà ­¨æë), «¨¡® ¨¬ï
  xlt-ä ©« . …᫨ ¨¬ï ä ©«  ­¥ ᮤ¥à¦¨â ¯ã⨠(à á¯®§­ ñâáï ¯® '\'),
  â® ä ©« ¨é¥âáï ¢ áâ ­¤ àâ­®¬ XLT-ª â «®£¥. ¥§ã«ìâ â - ãᯥå. `}

function BuildABCSortXlat(const FN: string): Boolean;
  {` ‘âநâáï ABCSortXlat ¤«ï ª®¤¨à®¢ª¨ FN. FN ¬®¦¥â ¯à¥¤áâ ¢«ïâì ᮡ®©
  «¨¡® ç¨á«® (⮣¤  íâ® ­®¬¥à ª®¤®¢®© áâà ­¨æë), «¨¡® ¨¬ï
  xlt-ä ©« . …᫨ ¨¬ï ä ©«  ­¥ ᮤ¥à¦¨â ¯ã⨠(à á¯®§­ ñâáï ¯® '\'),
  â® ä ©« ¨é¥âáï ¢ áâ ­¤ àâ­®¬ XLT-ª â «®£¥.
  …᫨ FN='' ¨« ®è¨¡ª , â® ABCSortXlat - ⮦¤¥á⢥­­ ï ¯¥à¥ª®¤¨à®¢ª .
  ¥§ã«ìâ â - ãᯥå.
  !! ‚­¨¬ ­¨¥: ¢ ­ áâ®ï騩 ¬®¬¥­â (04.05.2005) ॠ«¨§®¢ ­ ⮫쪮
     xlt-¢ à¨ ­â FN.
  `}

function BuildLayoutConvXlat(const FN: string): Boolean;
  {` ‘âநâáï LayoutConvXlat ¤«ï ª®¤¨à®¢ª¨ FN. FN ¬®¦¥â ¯à¥¤áâ ¢«ïâì ᮡ®©
  «¨¡® ç¨á«® (⮣¤  íâ® ­®¬¥à ª®¤®¢®© áâà ­¨æë), «¨¡® ¨¬ï
  xlt-ä ©« . …᫨ ¨¬ï ä ©«  ­¥ ᮤ¥à¦¨â ¯ã⨠(à á¯®§­ ñâáï ¯® '\'),
  â® ä ©« ¨é¥âáï ¢ áâ ­¤ àâ­®¬ XLT-ª â «®£¥.
  …᫨ FN='', â® LayoutConvXlat - ⮦¤¥á⢥­­ ï ¯¥à¥ª®¤¨à®¢ª .
  ¥§ã«ìâ â - ãᯥå.
  `}

procedure XLatStr(var S: String; const XLat: TXLat);

procedure XLatBuf(var B; Len: Integer; const XTable: TXLat);

procedure FreeCodetables;
  {`“­¨ç⮦¥­¨¥ ¢á¥å â ¡«¨æ, ªà®¬¥ ASCII. à¨ ¯®áâ஥­¨¨ â ¡«¨æ
  ­¥®¡å®¤¨¬® ᮡ«î¤ âì ¯®à冷ª ¢ë§®¢  ä㭪権: FreeCodetables,
  BuildWinCodeTable, InitCodeTables. ’®«ìª® ¯à¨ â ª®¬ ¯®à浪¥
  §­ ç¥­¨¥ MaxKeyMap ¡ã¤¥â ª®à४â­ë¬, ­¥ ¡ã¤¥â ®áâ ¢ âìáï ¬ãá®à 
  ¢ ªãç¥ ¨ ­¥ ¡ã¤¥â  ¤à¥á æ¨¨ ç¥à¥§ nil`}

function BuildWinCodeTable(S: string): Boolean;
  {` Ž¡à ¡®âª  ¢¨­¤®¢®© ª®¤®¢®© áâà ­¨æë. S ¤®«¦¥­ ¨¬¥âì ¨¬¥¥â ¢¨¤
  837 'win866r.xlt'. ‘¬. â ª¦¥ FreeCodetables`}

function InitCodeTables(CodeTables: string): Boolean;
  {` Ž¡à ¡®âª  ini-¯¥à¥¬¥­­®© CodeTables. ‘®á⮨⠨§ à §¤¥«ñ­­ëå
  ¯à®¡¥« ¬¨ í«¥¬¥­â®¢ ¢¨¤  KOI:837 ¨«¨ ¢¨¤  KOI:koi8-r.xlt `}

procedure OemToCharSt(var OemS: String); {JO}
  {` ¥à¥¢®¤ ¨§ DOS ¢ WIN `}
procedure CharToOemSt(var CharS: String); {JO}
  {` ¥à¥¢®¤ ¨§ WIN ¢ DOS `}
function OemToCharStr(const OemS: String): String;
  {` ¥à¥¢®¤ ¨§ DOS ¢ WIN `}
function CharToOemStr(const CharS: String): String;
  {` ¥à¥¢®¤ ¨§ WIN ¢ DOS `}

implementation
  uses
    Country_, advance, Streams;

procedure XLatBuf(var B; Len: Integer; const XTable: TXLat);
  assembler;
  {&Frame-} {$USES ESI, EBX, ECX, EDI}
asm
    cmp  Len, 0
    jle  @@1
    mov  ECX, Len
    mov  ESI, B
    mov  EBX, XTable
    xor  EAX, EAX
    cld
 @@Loop:
    lodsb
    mov  EDI, EAX
    mov  AL, [EBX+EDI]
    mov  [ESI-1], AL
    loop @@Loop
 @@1:
  end;

const
  WinSetA = [#224, #229, #232, #238, #243];
  KoiSetA = [#193, #197, #201, #207, #213];

procedure TCodePageDetector.CheckString(P1: PChar; len: Integer);
  var
    C: Char;
    P2: PChar;
  begin
  P2 := P1+len;
  while P1 < P2 do
    begin
    C := P1^;
    Inc(P1);
    if C >= #$C0 then
      if C <= #$DF then
        begin
        Inc(Koi);
        if C in KoiSetA then
          Inc(KoiA);
        end
      else
        begin
        Inc(Win);
        if C in WinSetA then
          Inc(WinA);
        if C >= #$F0 then
          Inc(Win2);
        end;
    end;
  end { TCodePageDetector.CheckString };

function TCodePageDetector.DetectedCodePage: TKeyMap;
  begin
  DetectedCodePage := kmAscii;
  if  (Koi <> 0) and (KoiA <> 0) and (Win <> 0) and
      (Win >= Koi div 500) and (Win <= Koi div 5) and
      (KoiA >= Koi div 5)
  then
    begin
    if KeyMapDescr[kmKoi8r].Tag = 'KOI' then
      DetectedCodePage := kmKoi8r;
    end
  else if (Win <> 0) and (WinA <> 0) and (Koi <> 0) and
      (Koi >= Win div 500) and (Koi <= Win div 5) and
      (WinA >= Win div 5) and (Win2 >= Win div 5)
  then
    DetectedCodePage := kmAnsi;
  end;
{(c) SeYKo}

function ProcessDefCodepage(DefCodepageS: String): TKeyMap;
  var
    i: Integer;
    k: TKeyMap;
  begin
{ •®ç¥âáï ­ ¯¨á âì UpStr(DefCodepageS), ­® «ãçè¥ í⮣® ­¥ ¤¥« âì, â ª
ª ª í⮠ᮧ¤ ñâ ¦ãâªãî § ªàãâªã ááë«®ª ¬¥¦¤ã ¬®¤ã«ï¬¨ ç¥à¥§ advance1.
¨, £« ¢­®¥, à ¡®â ¥â á ª ª®©-â® § à ­¥¥ ­¥¨§¢¥áâ­®© UpCaseArray.
®áª®«ìªã ¯ à ¬¥âàë ¢ dn.ini ¢á¥  ­£«¨©áª¨¥, ¤¥« ¥¬ ¯à®áâ®:}
  for i := 1 to Length(DefCodepageS) do
    DefCodepageS[i] := System.UpCase(DefCodepageS[i]);

  if DefCodepageS = 'AUTO' then
    Result := kmNone
  else
    begin
    Result := kmAscii; // ­  á«ãç © ­¥ª®à४⭮£® §­ ç¥­¨ï
    for k := Succ(kmAscii) to MaxKeyMap do
      if DefCodepageS = KeyMapDescr[k].Tag then
        begin
        Result := k;
        Exit;
        end;
    end;
  end;

procedure NullXLAT;
  var
    C: Char;
  begin
  for C := #0 to #255 do
    X[C] := C;
  end;

procedure XLatLongStr(const InStr: LongString; var OutStr: LongString;
   const XLat: TXLat);
  var
    i: Longint;
  begin
  SetLength(OutStr, Length(InStr));
  for i := 1 to Length(InStr) do
    OutStr[i] := XLat[InStr[i]];
  end;

function Ascii_Ansi(const S: LongString): LongString;
  begin
  XLatLongStr(S, Result, KeyMapDescr[kmAnsi].XlatCP^[FromAscii]);
  end;

function Ansi_Ascii(const S: LongString): LongString;
  begin
  XLatLongStr(S, Result, KeyMapDescr[kmAnsi].XlatCP^[ToAscii]);
  end;

procedure AcceptToAscii(var XLatCP: TXLatCP);
  var
    C: Char;
  begin
{ ’ ¡«¨æ  ToAscii ¡ë¢ ¥â ­¥ ®¡à â¨¬®© ®¤­®§­ ç­®.  ¯à¨¬¥à,
¯®¤ WinNT ¯®áâ஥­¨¥ ¯¥à¥¢®¤  ç¥à¥§ î­¨ª®¤ ¯à¨¢®¤¨â ª
¯¥à¥ª®¤¨à®¢ª ¬ ¢ "¯®å®¦¨¥", ᨬ¢®«ë ¢à®¤¥ ª®¯¨¯ ©â  ¢ 'C'.
® "¯à ¢¨«ì­ë¥" ª®¤ë ¢á¥£¤  ¬¥­ìè¥ "¯®å®¦¨å", ¯®í⮬㠮¡à é¥­¨¥
â ¡«¨æë ­ ¤® ¤¥« âì ­¥ ®â #00 ª #$FF,   ­ ®¡®à®â. }
  FillChar(XLatCP[FromAscii], SizeOf(TXLat), '?');
  for C := High(TXLat) downto Low(TXLat) do
    begin
    XLatCP[ToUpAscii][C] := Upcase(XLatCP[ToAscii][C]);
    XLatCP[FromAscii][XLatCP[ToAscii][C]] := C;
    end;
  end;

function ReadXlt(FN: string; var N: Integer): PCodeConv;
  var
    S: TDOSStream;
    I, J: Integer;
  begin
  Result := nil;
  N := 0;
  if FN <> '' then
    begin
    if Pos('\', FN) = 0 then
      FN := SourceDir+'XLT\' + FN;
    S.Init(FN, stOpenRead);
    if  (S.GetSize >= 2) and (S.GetSize <= 256*4) then
      begin
      N := i32(S.GetSize);
      GetMem(Result, N);
      S.Read(Result^, N);
      end;
    S.Done;
    end;
  end;

function BuildLayoutConvXlat(const FN: string): Boolean;
  var
    Conv, Conv0: PCodeConv;
    I, J: Integer;
  begin
  Result := True;
  NullXlat(LayoutConvXlat);
  if FN = '' then
    Exit;
  Conv0 := ReadXlt(FN, J);
  if Conv0 <> nil then
    begin
    Conv := Conv0;
    for I := 1 to J div 2 do
      begin
      if not (Conv^.A in [#$0D, #$0A]) then
        begin
        LayoutConvXlat[Conv^.A] := Conv^.B;
        LayoutConvXlat[Conv^.B] := Conv^.A;
        end;
      inc(Conv);
      end;
    FreeMem(Conv0);
    end
  else
    Result := False;
  end;

function BuildABCSortXlat(const FN: string): Boolean;
  var
    L: Integer;
    Conv: PCodeConv;
  begin
  Result := True;
  NullXlat(ABCSortXlat);
  if FN = '' then
    Exit;
  NullXlat(ABCSortXlat);
  Conv := ReadXlt(FN, L);
  if Conv = nil then
    begin
    Result := False;
    Exit;
    end;
  ConvToXlat(Conv, L, ABCSortXlat);
  end;

procedure XLatStr(var S: String; const XLat: TXLat);
  var
    i: Longint;
  begin
  for i := 1 to Length(S) do
    S[i] := XLat[S[i]];
  end;

procedure InitUpcase;
  var
    C, L, U: Char;
  begin
  QueryUpcaseTable;
  NullXLAT(LowCaseArray);
{á¬. ª®¬¬¥­â à¨© ª AcceptToAscii}
  for C := High(TXlat) downto Low(TXlat) do
    if UpCaseArray[C] <> C then
      LowCaseArray[UpCaseArray[C]] := C;
  for C := High(TXlat) downto Low(TXlat) do
    begin
    L := LowCaseArray[C];
    U := UpCaseArray[C];
    ToggleCaseArray[L] := U;
    ToggleCaseArray[U] := L;
    end;
  end { InitUpcase };

procedure ConvToXlat(Conv: PCodeConv; L: Integer; var Xlat: TXLat);
  var
    I: Integer;
    Conv0: PCodeConv;
  begin
  Conv0 := Conv;
  for I := 1 to L div 2 do
    begin
    if not (Conv^.A in [#$0D, #$0A]) then
      Xlat[Conv^.A] := Conv^.B;
    Inc(Conv);
    end;
  FreeMem(Conv0);
  end;

function BuildCodeTable(const S: string; var XlatCP: TXLatCP): Boolean;
  var
    CP: Integer;
    Err: Integer;
    I, L: Integer;
    Conv: PCodeConv;
    C: Char;
  begin
  Result := False;
  Val(S, CP, Err);
  if Err = 0 then
    Result := QueryToAscii(CP, XlatCP[ToAscii])
  else
    begin { ¤®«¦­® ¡ëâì ¨¬ï xlt-ä ©« }
    NullXLAT(XlatCP[ToAscii]);
    Conv := ReadXlt(S, L);
    if Conv <> nil then
      begin
      ConvToXlat(Conv, L, XlatCP[ToAscii]);
      Result := True;
      end;
    end;
  if Result then
    AcceptToAscii(XlatCP);
  end;

procedure FreeCodetables;
  var
    km: TKeyMap;
    i: Integer;
  begin
  for km := Succ(kmAnsi) to MaxKeyMap do
    FreeMem(KeyMapDescr[km].XlatCP);
  MaxKeyMap := kmAscii;
  for km := Low(km) to kmAscii do
    RollKeyMap[km] := kmAnsi;
  for i := Low(TXLatCP) to High(TXLatCP) do
    WinXlatCP[i] := NullXlatTable;
  end;

function BuildWinCodeTable(S: string): Boolean;
  var
    km: TKeyMap;
  begin
  Result := BuildCodeTable(S, WinXlatCP);
  if Result then
    begin
    AcceptToAscii(WinXlatCP);
    MaxKeyMap := kmAnsi;
    for km := Low(km) to kmAscii do
      RollKeyMap[km] := kmAnsi;
    end;
  end;

function InitCodeTables(CodeTables: string): Boolean;
  var
    l1, l2: Integer;
    CP: Word;
    Err: Integer;
    I, J: Integer;
    S: String;
    km: TKeyMap;
    GoodTable: Boolean;
    C: Char;
    b: Boolean;
  begin
  Result := False;
  CodeTables := CodeTables + ' '; // „«ï Pos(' ');
  while CodeTables <> '' do
    begin
    l1 := Pos(':', CodeTables);
    if l1 = 0 then
      Break;
    l2 := Pos(' ', CodeTables);
    if l2 = 0 then
      Break;
    Inc(MaxKeyMap);
    GoodTable := False;
    with KeyMapDescr[MaxKeyMap] do
      begin
      GetMem(XlatCP, SizeOf(TXlatCP));
      Tag := DelSpaces(Copy(CodeTables, 1, l1-1));
      end;
    S := DelSpaces(Copy(CodeTables, l1+1, l2-l1));
    System.Delete(CodeTables, 1, l2);
    GoodTable := BuildCodeTable(S, KeyMapDescr[MaxKeyMap].XlatCP^);
    with KeyMapDescr[MaxKeyMap] do
      if not GoodTable then
        begin
        FreeMem(XlatCP);
        Dec(MaxKeyMap);
        Exit;
        end
      else
        begin
        RollKeyMap[Pred(MaxKeyMap)] := MaxKeyMap;
        RollKeyMap[MaxKeyMap] := kmAscii;
        end;
    end;
  DelSpace(CodeTables);
  Result := CodeTables = '';
  end;

{JO}
procedure OemToCharSt(var OemS: String);
  begin
  XLatBuf(OemS[1], Length(OemS), WinXlatCP[FromAscii]);
  end;

procedure CharToOemSt(var CharS: String);
  begin
  XLatBuf(CharS[1], Length(CharS), WinXlatCP[ToAscii]);
  end;

function OemToCharStr(const OemS: String): String;
  var
    I: Byte;
  begin
  SetLength(Result, Length(OemS));
  for I := 1 to Length(OemS) do
    Result[I] := WinXlatCP[FromAscii][OemS[I]];
  end;

function CharToOemStr(const CharS: String): String;
  var
    I: Byte;
  begin
  SetLength(Result, Length(CharS));
  for I := 1 to Length(CharS) do
    Result[I] := WinXlatCP[ToAscii][CharS[I]];
  end;
{/JO}

begin
NullXLAT(NullXlatTable);
NullXlatTable1 := NullXlatTable;
FreeCodetables; {â® ¡¥§®¯ á­®, â ª ª ª MaxKeyMap ᥩç á ­ã«¥¢®© }
GetSysCountryInfo; InitUpcase;
end.