Копирование файлов
Копирование методом TurboPascalType
TCallBack=procedure(Position,Size:Longint); {Для индикации процесса копирования}
procedure FastFileCopy(Const InfileName, OutFileName: String; CallBack: TCallBack);
Const BufSize = 3*4*4096; { 48Kbytes дает прекрасный результат }
Type
PBuffer = ^TBuffer;
TBuffer = array [1..BufSize] of Byte;
var
Size : integer;
Buffer : PBuffer;
infile, outfile : File;
SizeDone,SizeFile: Longint;
begin
if (InFileName lt;gt; OutFileName) then begin
buffer := Nil;
AssignFile(infile, InFileName);
System.Reset(infile, 1);
try
SizeFile := FileSize(infile);
AssignFile(outfile, OutFileName);
System.Rewrite(outfile, 1);
try
SizeDone := 0; New(Buffer);
repeat
BlockRead(infile, Buffer^, BufSize, Size);
Inc(SizeDone, Size);
CallBack(SizeDone, SizeFile);
BlockWrite(outfile,Buffer^, Size)
until Size lt; BufSize;
FileSetDate(TFileRec(outfile).Handle,
FileGetDate(TFileRec(infile).Handle));
finally
if Buffer lt;gt; Nil then Dispose(Buffer);
System.close(outfile)
end;
finally
System.close(infile);
end;
end else Raise EInOutError.Create('File cannot be copied into itself');
end;
Копирование методом потокаProcedure FileCopy(Const SourceFileName, TargetFileName: String);
Var
S,T : TFileStream;
Begin
S := TFileStream.Create(sourcefilename, fmOpenRead );
try
T := TFileStream.Create(targetfilename, fmOpenWrite or fmCreate);
try
T.CopyFrom(S, S.Size ) ;
FileSetDate(T.Handle, FileGetDate(S.Handle));
finally
T.Free;
end;
finally
S.Free;
end;
end;
Копирование методом LZExpanduses LZExpand;
procedure CopyFile(FromFileName, ToFileName : string);
var
FromFile, ToFile: File;
begin
AssignFile(FromFile, FromFileName);
AssignFile(ToFile, ToFileName);
Reset(FromFile);
try
Rewrite(ToFile);
try
if LZCopy(TFileRec(FromFile).Handle, TFileRec(ToFile).Handle)lt;0 then raise Exception.Create('Error using LZCopy')
finally
CloseFile(ToFile);
end;
finally
CloseFile(FromFile);
end;
end;
Копирование методами Windowsuses ShellApi; // !!! важно
function WindowsCopyFile(FromFile, ToDir : string) : boolean;
var F : TShFileOpStruct;
begin
F.Wnd := 0; F.wFunc := FO_COPY;
FromFile:=FromFile+#0; F.pFrom:=pchar(FromFile);
ToDir:=ToDir+#0; F.pTo:=pchar(ToDir);
F.fFlags := FOF_ALLOWUNDO or FOF_NOCONFIRMATION;
result:=ShFileOperation(F) = 0;
end;
// пример копирования
procedure TForm1.Button1Click(Sender: TObject);
begin
if not WindowsCopyFile('C:\UTIL\ARJ.EXE', GetCurrentDir) then ShowMessage('Copy Failed');
end;