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³»¿ëÀ» º¹»çÇÏ¿© »ç¿ëÇÒ °æ¿ì ¹Ýµå½Ã À̰÷(http://www.howto.pe.kr)À» Ãâó·Î ¸í½ÃÇÏ¿© ÁÖ¼¼¿ä


Category

  ±è¿µ´ë(2004-08-03 13:03:40, Hit : 5459, Vote : 1258
 http://www.howto.pe.kr
 Zlib ¸¦ ÀÌ¿ëÇÑ ¾ÐÃà°ú ÇØÁ¦

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Zlib, ComCtrls, DbiTypes, DbiProcs, DbiErrs;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    RichEdit1: TRichEdit;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure CompressStream(inpStream, outStream: TStream);
var
  InpBuf, OutBuf: Pointer;
  InpBytes, OutBytes: Integer;
begin
  InpBuf := nil;
  OutBuf := nil;
  try
    GetMem(InpBuf, inpStream.Size);
    inpStream.Position := 0;
    InpBytes := inpStream.Read(InpBuf^, inpStream.Size);
    CompressBuf(InpBuf, InpBytes, OutBuf, OutBytes);
    outStream.Write(OutBuf^, OutBytes);
  finally
    if InpBuf <> nil then FreeMem(InpBuf);
    if OutBuf <> nil then FreeMem(OutBuf);
  end;
end;

procedure DecompressStream(inpStream, outStream: TStream);
var
  InpBuf, OutBuf: Pointer;
  OutBytes, sz: Integer;
begin
  InpBuf := nil;
  OutBuf := nil;
  sz := inpStream.Size - inpStream.Position;
  if sz > 0 then
    try
      GetMem(InpBuf, sz);
      inpStream.Read(InpBuf^, sz);
      DecompressBuf(InpBuf, sz, 0, OutBuf, OutBytes);
      outStream.Write(OutBuf^, OutBytes);
    finally
      if InpBuf <> nil then FreeMem(InpBuf);
      if OutBuf <> nil then FreeMem(OutBuf);
    end;
  outStream.Position := 0;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  ms1, ms2: TMemoryStream;
begin
  ms1 := TMemoryStream.Create;
  try
    ms2 := TMemoryStream.Create;
    try
      RichEdit1.Lines.SaveToFile('C:\zzz\original.dat'); // ¿øº»

      RichEdit1.Lines.SaveToStream(ms1);
      CompressStream(ms1, ms2);
      ShowMessage(Format('¾ÐÃâÀ²: %d %%', [round(100 / ms1.Size * ms2.Size)]));
      ms2.SaveToFile('C:\zzz\compressed.dat');
      RichEdit1.Clear;
    finally
      ms1.Free;
    end;
  finally
    ms2.Free;
  end;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  ms1, ms2: TMemoryStream;
begin
  ms1 := TMemoryStream.Create;
  try
    ms2 := TMemoryStream.Create;
    try
      ms1.LoadFromFile('C:\zzz\compressed.dat');
      DecompressStream(ms1, ms2);
      RichEdit1.Lines.LoadFromStream(ms2);
    finally
      ms1.Free;
    end;
  finally
    ms2.Free;
  end;
end;

// ¾Æ·¡´Â ¿¹Á¦ ¹®ÀÚ¿­À» ¸¸µé±â À©ÇÑ °ÍÀÔ´Ï´Ù
procedure TForm1.FormCreate(Sender: TObject);
var
  Category: byte;
  Code: byte;
  ResultCode: word;
  ErrorString: array[0..DBIMAXMSGLEN + 1] of char;
  OutString: string;
begin
  // BDE ȯ°æÀ» ÃʱâÈ­ ÇÑ´Ù
  DbiInit(nil);

  RichEdit1.Lines.Clear;

  for Category := ERRCAT_NONE to ERRCAT_RC do
    for Code := 0 to 255 do
    begin
      ResultCode := (Category shl 8) + Code;
      // error code ¿¡ ÇØ´çÇÏ´Â ¸Þ½ÃÁö¸¦ ±¸ÇÑ´Ù
      DbiGetErrorString(ResultCode, ErrorString);
      if StrLen(ErrorString) > 0 then // ÁÖ¾îÁø ¿¡·¯ÄÚµåÀÇ ¼³¸íÀÌ Àִ°͸¸ ¹ßÃë
      begin
        OutString := Format('%6d  %0.4x  %s', [ResultCode, ResultCode, ErrorString]);
        RichEdit1.Lines.Add(OutString);
      end;
    end;

  // BDE ·Î ºÎÅÍ Á¢¼ÓÀ» ÇØÁ¦ÇÏ¿© »ç¿ëÇÑ ÀÚ¿øÀ» ¹Ý³³ÇÑ´Ù
  DbiExit;
end;

end.





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