有关UNRAR.dll的调用问题

[huiwww]

有谁会使用UNRAR.dll来压缩解压文件，请提供函数调用方法，最好还有代码，分不够可再给。

[Ascn]

关注，我曾经也想这样做：）

[aiirii]

function RAROpenArchive(ArchiveData : Pointer): Integer; stdcall;
external 'unrar.dll' name 'RAROpenArchive';

function RARCloseArchive(hArcData : Integer): Integer; stdcall;
external 'unrar.dll' name 'RARCloseArchive';

function RARReadHeader(hArcData : Integer; HeaderData : Pointer):
Integer; stdcall;
external 'unrar.dll' name 'RARReadHeader';

function RARProcessFile(hArcData : Integer; Operation : Integer;
DestPath : Pointer; DestName : Pointer): Integer; stdcall;
external 'unrar.dll' name 'RARProcessFile';


const
ERAR_END_ARCHIVE = 10;
ERAR_NO_MEMORY = 11;
ERAR_BAD_DATA = 12;
ERAR_BAD_ARCHIVE = 13;
ERAR_UNKNOWN_FORMAT = 14;
ERAR_EOPEN = 15;
ERAR_ECREATE = 16;
ERAR_ECLOSE = 17;
ERAR_EREAD = 18;
ERAR_EWRITE = 19;
ERAR_SMALL_BUF = 20;

RAR_OM_LIST = 0;
RAR_OM_EXTRACT = 1;
RAR_SKIP = 0;
RAR_TEST = 1;
RAR_EXTRACT = 2;
RAR_VOL_ASK = 0;
RAR_VOL_NOTIFY = 1;

type
Char260 = array [1..260] of Char;

TRAROpenArchiveData = record
ArcName : PChar; // в C++ это будет выглядеть как: char *ArcName
OpenMode : Cardinal;
OpenResult : Cardinal;
CmtBuf : PChar;
CmtBufSize : Cardinal;
CmtSize : Cardinal;
CmtState : Cardinal;
end;

TRARHeaderData = record
ArcName : Char260;
FileName : Char260;
Flags : Cardinal;
PackSize : Cardinal;
UnpSize : Cardinal;
HostOS : Cardinal;
FileCRC : Cardinal;
FileTime : Cardinal;
UnpVer : Cardinal;
Method : Cardinal;
FileAttr : Cardinal;
CmtBuf : PChar;
CmtBufSize : Cardinal;
CmtSize : Cardinal;
CmtState : Cardinal;
end;


var
RARExtract : boolean;
RAROpenArchiveData : TRAROpenArchiveData;
RARComment : array [1..256] of Char;
RARHeaderData : TRARHeaderData;

...

procedure ExtractRARArchive;
var
sDir : string;
s : string;
sTest : string;
iTest : integer;
bTestDone : boolean;
RARhnd : Integer;
RARrc : Integer;
PDestPath : Char260;
begin
RARExtract:=TRUE;
lKBWritten:=0;
ProgressBar2.Position := 0;
ProgressBar2.Max := lTotalSize;
RARStartTime:=Time;

RAROpenArchiveData.OpenResult:=99;
RAROpenArchiveData.OpenMode := RAR_OM_EXTRACT; // открываем для распаковки
RAROpenArchiveData.ArcName:= @RARFileName;
RAROpenArchiveData.CmtBuf := @RARComment;
RAROpenArchiveData.CmtBufSize := 255;

// Открываем RAR архив и выделяем память
RARhnd := RAROpenArchive (@RAROpenArchiveData);
if RAROpenArchiveData.OpenResult <> 0 then
begin
case RAROpenArchiveData.OpenResult of
ERAR_NO_MEMORY : s:='Not enough memory to initialize data structures';
ERAR_BAD_DATA : s:='Archive header broken';
ERAR_BAD_ARCHIVE : s:='File is not valid RAR archive';
ERAR_EOPEN : s:='File open error';
end;
MessageDlg('Unable to open rar archive: ' + s + '!',mtError, [mbOK], 0);
end;

RARSetProcessDataProc(RARhnd,@Form.OnRarStatus);
StrPCopy(@PDestPath, EInstallPath.Text);

repeat
RARrc := RARReadHeader (RARhnd, @RARHeaderData);// Читаем заголовок
if RARrc <> ERAR_END_ARCHIVE then
begin
ProgressBar1.Position := 0;
ProgressBar1.Max := RARHeaderData.UnpSize;
s:=RARHeaderData.FileName;
lblCurrentFile.Caption := s;
lKBytesDone := 0;
end;

if RARrc = 0 then
RARrc:=RARProcessFile (RARhnd, RAR_EXTRACT, @PDestPath, nil);
if (RARrc <> 0) and (RARrc <> ERAR_END_ARCHIVE) then
begin
MessageDlg('An Error occured during extracting of ' + sTest+'!' + #13#10 +
'RARProcessFile: ' + MakeItAString(RARrc),mtError, [mbOK], 0);
end;
until
RARrc <> 0;

// закрываем RAR архив и освобождаем память
if RARCloseArchive(RARhnd) <> 0 then
begin
MessageDlg('Unable to close rar archive!',mtError, [mbOK], 0);
end;
end;

[Ascn]

在官方网站上有相关资源，以前我看过有关的函数声明，但当时嫌麻烦，没动手做
http://www.rarlab.com/rar_add.htm

[Ascn]

汗，刚才没看到
感谢aiirii(ari)，收藏ed.