Cromis.Unicode.pas

(*
 * This software is distributed under BSD license.
 *
 * Copyright (c) 2008 Iztok Kacin, Cromis (iztok.kacin@gmail.com).
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * - 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.
 * - Neither the name of the Iztok Kacin nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER 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.
*)
unit Cromis.Unicode;

interface

uses
  SysUtils;

const
  Utf8BOM: array[0..2] of Byte = ($EF, $BB, $BF);
  Utf16BEBOM: array[0..1] of Byte = ($FE, $FF);
  Utf16LEBOM: array[0..1] of Byte = ($FF, $FE);
  Utf32BEBOM: array[0..3] of Byte = ($00, $00, $FE, $FF);
  Utf32LEBOM: array[0..3] of Byte = ($FF, $FE, $00, $00);

type
  {$IF Defined(CLR) or Defined(UNICODE)}
    uchar = Char;
    achar = AnsiChar;
    puchar = PChar;
    pachar = PAnsiChar;
    ustring = string;
    astring = AnsiString;
  {$ELSE}
    uchar = WideChar;
    achar = AnsiChar;
    puchar = PWideChar;
    pachar = PAnsiChar;
    ustring = Widestring;
    astring = AnsiString;
  {$IFEND}

  function CharInSet(const C: Char; const CharSet: TSysCharSet): Boolean;

implementation

function CharInSet(const C: Char; const CharSet: TSysCharSet): Boolean;
begin
  {$IF Defined(UNICODE)}
    Result := SysUtils.CharInSet(C, CharSet);
  {$ELSE}
    Result := C in CharSet;
  {$IFEND}
end;

end.