SysUtils.StrByteType - 获取字节类型

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;



type

  TForm1 = class(TForm)

    Memo1: TMemo;

    procedure FormCreate(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



//利用 StrByteType 做了个函数:

function GetByteType(p: PChar; i: Integer): string;

var

  bt: TMbcsByteType;

begin

  bt := StrByteType(p, i);

  case bt of

    mbSingleByte : Result := 'SingleByte'; {ASCII 字符}

    mbLeadByte   : Result := 'LeadByte';   {双字节字符前半}

    mbTrailByte  : Result := 'TrailByte';  {双字节字符后半}

  end;

end;



//测试:

procedure TForm1.FormCreate(Sender: TObject);

var

  p: PChar;

  i: Integer;

begin

  p := 'abc万一123';



  for i := 0 to Length(p) - 1 do

    Memo1.Lines.Add(GetByteType(p, i));



{显示结果如下:

  SingleByte

  SingleByte

  SingleByte

  LeadByte

  TrailByte

  LeadByte

  TrailByte

  SingleByte

  SingleByte

  SingleByte

}

end;



end.


 
   

SysUtils 单元下的公用函数目录

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