ђђђђђђ+ ђђђђђ+ ђђђђђђ+ unRAR.dll Manual
ђђ+--ђђ+ ђђ+--ђђ+ ђђ+--ђђ+ ~~~~~~~~~~~~~~~~
ђђђђђђ++ ђђђђђђђ| ђђђђђђ++ RAR 2.00 for Windows
ђђ+--ђђ+ ђђ+--ђђ| ђђ+--ђђ+ ~~~~~~~~~~~~~~~~~~~~
ђђ| ђђ| ђђ| ђђ| ђђ| ђђ| Multifunctional Integrated Archive Manager
+-+ +-+ +-+ +-+ +-+ +-+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
UNRAR.DLL is a 32-bit Windows dynamic-link library which provides file
extraction from RAR archives. It handles archives created with RAR 2.0
only and cannot extract files from archives of previous versions of RAR.
Exported functions
====================================================================
HANDLE PASCAL RAROpenArchive(struct RAROpenArchiveData *ArchiveData)
====================================================================
Description
~~~~~~~~~~~
Open RAR archive and allocate memory structures (about 1 Mb)
Parameters
~~~~~~~~~~
ArchiveData Points to RAROpenArchiveData structure
struct RAROpenArchiveData
{
char *ArcName;
UINT OpenMode;
UINT OpenResult;
char *CmtBuf;
UINT CmtBufSize;
UINT CmtSize;
UINT CmtState;
};
Structure fields:
ArcName
Input parameter which should point to a, zero terminated string
containing the archive name.
OpenMode
Input parameter.
Possible values
RAR_OM_LIST Open archive for reading file headers only
RAR_OM_EXTRACT Open archive for testing and extracting files
OpenResult
Output parameter.
Possible values
0 Success
ERAR_NO_MEMORY Not enough memory to initialize data structures
ERAR_BAD_DATA Archive header broken
ERAR_BAD_ARCHIVE File is not valid RAR archive
ERAR_EOPEN File open error
CmtBuf
Input parameter which should point to the buffer for archive
comments. Maximum comment size is limited to 64Kb. Comment text is
zero terminated. If the comment text is larger than the buffer
size, the comment text will be truncated. If CmtBuf is set to
NULL, comments will not be read.
CmtBufSize
Input parameter which should contain size of buffer for archive
comments.
CmtSize
Output parameter containing size of comments actually read into the
buffer, cannot exceed CmtBufSize.
CmtState
Output parameter.
Possible values
0 comments not present
1 Comments read completely
ERAR_NO_MEMORY Not enough memory to extract comments
ERAR_BAD_DATA Broken comment
ERAR_UNKNOWN_FORMAT Unknown comment format
ERAR_SMALL_BUF Buffer too small, comments not completely read
Return values
~~~~~~~~~~~~~
Archive handle or NULL in case of error
====================================================================
int PASCAL RARCloseArchive(HANDLE hArcData)
====================================================================
Description
~~~~~~~~~~~
Close RAR archive and release allocated memory. It must be called when
archive processing is finished, even if the archive processing was stopped
due to an error.
Parameters
~~~~~~~~~~
hArcData
This parameter should contain the archive handle obtained from the
RAROpenArchive function call.
Return values
~~~~~~~~~~~~~
0 Success
ERAR_ECLOSE Archive close error
====================================================================
int PASCAL RARReadHeader(HANDLE hArcData,
struct RARHeaderData *HeaderData)
====================================================================
Description
~~~~~~~~~~~
Read header of file in archive.
Parameters
~~~~~~~~~~
hArcData
This parameter should contain the archive handle obtained from the
RAROpenArchive function call.
HeaderData
It should point to RARHeaderData structure:
struct RARHeaderData
{
char ArcName[260];
char FileName[260];
UINT Flags;
UINT PackSize;
UINT UnpSize;
UINT HostOS;
UINT FileCRC;
UINT FileTime;
UINT UnpVer;
UINT Method;
UINT FileAttr;
char *CmtBuf;
UINT CmtBufSize;
UINT CmtSize;
UINT CmtState;
};
Structure fields:
ArcName
Output parameter which contains a zero terminated string of the
current archive name. May be used to determine the current volume
name.
FileName
Output parameter which contains a zero terminated string of the
file name.
Flags
Output parameter which contains file flags:
0x01 - file continued from previous volume
0x02 - file continued on next volume
0x04 - file encrypted with password
0x08 - file comment present
0x10 - compression of previous files is used (solid flag)
bits 7 6 5
0 0 0 - dictionary size 64 Kb
0 0 1 - dictionary size 128 Kb
0 1 0 - dictionary size 256 Kb
0 1 1 - dictionary size 512 Kb
1 0 0 - dictionary size 1024 Kb
1 0 1 - reserved
1 1 0 - reserved
1 1 1 - file is directory
Other bits are reserved.
PackSize
Output parameter means packed file size or size of the
file part if file was split between volumes.
UnpSize
Output parameter - unpacked file size.
HostOS
Output parameter - operating system used for archiving:
0 - MS DOS;
1 - OS/2.
2 - Win32
3 - Unix
FileCRC
Output parameter which contains unpacked file CRC. It should not be
used for file parts which were split between volumes.
FileTime
Output parameter - contains date and time in standard MS DOS format.
UnpVer
Output parameter - RAR version needed to extract file.
It is encoded as 10 * Major version + minor version.
Method
Output parameter - packing method.
FileAttr
Output parameter - file attributes.
CmtBuf
Input parameter which should point to the buffer for archive
comments. Maximum comment size is limited to 64Kb. Comment text is
a zero terminated string. If the comment text is larger than the
buffer size, the comment text will be truncated. If CmtBuf is set
to NULL, comments will not be read.
CmtBufSize
Input parameter which should contain size of buffer for archive
comments.
CmtSize
Output parameter containing size of comments actually read into the
buffer, should not exceed CmtBufSize.
CmtState
Output parameter.
Possible values
0 Absent comments
1 Comments read completely
ERAR_NO_MEMORY Not enough memory to extract comments
ERAR_BAD_DATA Broken comment
ERAR_UNKNOWN_FORMAT Unknown comment format
ERAR_SMALL_BUF Buffer too small, comments not completely read
Return values
~~~~~~~~~~~~~
0 Success
ERAR_END_ARCHIVE End of archive
ERAR_BAD_DATA File header broken
====================================================================
int PASCAL RARProcessFile(HANDLE hArcData,
int Operation,
char *DestPath,
char *DestName)
====================================================================
Description
~~~~~~~~~~~
Performs action and moves the current position in the archive to
the next file. Extract or test the current file from the archive
opened in RAR_OM_EXTRACT mode. If the mode RAR_OM_LIST is set,
then a call to this function will simply skip the archive position
to the next file.
Parameters
~~~~~~~~~~
hArcData
This parameter should contain the archive handle obtained from the
RAROpenArchive function call.
Operation
File operation.
Possible values
RAR_SKIP Move to the next file in the archive. If the
archive is solid and RAR_OM_EXTRACT mode was set
when the archive was opened, the current file will
be processed - the operation will be performed
slower than a simple seek.
RAR_TEST Test the current file and move to the next file in
the archive. If the archive was opened with
RAR_OM_LIST mode, the operation is equal to
RAR_SKIP.
RAR_EXTRACT Extract the current file and move to the next file.
If the archive was opened with RAR_OM_LIST mode,
the operation is equal to RAR_SKIP.
DestPath
This parameter should point to a zero terminated string containing the
destination directory to which to extract files to. If DestPath is equal
to NULL it means extract to the current directory. This parameter has
meaning only if DestName is NULL.
DestName
This parameter should point to a string containing the full path and name
of the file to be extracted or NULL as default. If DestName is defined
(not NULL) it overrides the original file name saved in the archive and
DestPath setting.
Return values
~~~~~~~~~~~~~
0 Success
ERAR_BAD_DATA File CRC error
ERAR_BAD_ARCHIVE Volume is not valid RAR archive
ERAR_UNKNOWN_FORMAT Unknown archive format
ERAR_EOPEN Volume open error
ERAR_ECREATE File create error
ERAR_ECLOSE File close error
ERAR_EREAD Read error
ERAR_EWRITE Write error
====================================================================
void PASCAL RARSetChangeVolProc(HANDLE hArcData,
int (*ChangeVolProc)(char *ArcName,int Mode));
====================================================================
Description
~~~~~~~~~~~
Set a user-defined function to process volume changing.
Parameters
~~~~~~~~~~
hArcData
This parameter should contain the archive handle obtained from the
RAROpenArchive function call.
ChangeVolProc
It should point to a user-defined "volume change processing" function.
The function will be passed two parameters:
ArcName Points to the zero terminated name
of the next volume.
Mode The function call mode.
Possible values
RAR_VOL_ASK Required volume is absent. The function should
prompt user and return a non-zero value
to retry or return a zero value to terminate
operation. The function may also specify a new
volume name, placing it to the ArcName parameter.
RAR_VOL_NOTIFY Required volume is successfully opened.
This is a notification call and ArcName
modification is not allowed. The function should
return a non-zero value to continue or a zero
value to terminate operation.
Other functions of UNRAR.DLL should not be called from the
ChangeVolProc function.
Return values
~~~~~~~~~~~~~
None
====================================================================
void PASCAL RARSetProcessDataProc(HANDLE hArcData,
int (*ProcessDataProc)(unsigned char *Addr,int Size))
====================================================================
Description
~~~~~~~~~~~
Set a user-defined function to process unpacked data. It may be used
to read a file while it is being extracted or tested without actual
extracting file to disk.
Parameters
~~~~~~~~~~
hArcData
This parameter should contain the archive handle obtained from the
RAROpenArchive function call.
ProcessDataProc
It should point to user-defined "data processing" function.
The function is called each time when the next data portion is unpacked.
It will be passed two parameters.
Addr The address pointing to the unpacked data. The
function may refer to the data but must not change
it.
Size The size of the unpacked data. It is guaranteed only
that the size will not exceed 1 Mb (1048576 bytes).
Any other presumptions may not be correct for
future implementations of UNRAR.DLL.
The ProcessDataProc function should return a non-zero value to continue
process or a zero value to cancel the archive operation.
Other functions of UNRAR.DLL should not be called from the
ProcessDataProc function.
Return values
~~~~~~~~~~~~~
None
====================================================================
void PASCAL RARSetPassword(HANDLE hArcData,
char *Password);
====================================================================
Description
~~~~~~~~~~~
Set a password to decrypt files.
Parameters
~~~~~~~~~~
hArcData
This parameter should contain the archive handle obtained from the
RAROpenArchive function call.
Password
It should point to a string containing a zero terminated password.
Return values
~~~~~~~~~~~~~
None
| 
Vadim Bodrov