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Hammerfist

DllCall to BZIP2.dll method fails when I try to use function

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Hammerfist

Hi guys.

I try to choose an algorithm to compress some string data in-memory, without file medium to store in sqlite as blob. I plan to store about 100k blobs each 80k symbols (uncompressed). First opinion was LZMA udf by Ward, but udf file doesn't exist.

Then i tried to use BZIP2 dll in DllCall, but it simply doesn't work and throws @error = 1.

 

Here is an example:

Spoiler
$hBZDll = DllOpen(@ScriptDir & "\bzip2.dll") ; obtained at http://gnuwin32.sourceforge.net/packages/bzip2.htm

$data = "binbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbinbin"

$Ret = _DB_CompressData($data)
MsgBox(0, $Ret[2], Binary($Ret[0]))

Func _DB_CompressData($data)

    Local $Size_O, $Size_C, $Size_R, $a_pBuffer, $ret[3]
    $Size_O = BinaryLen($data)
    $Size_R = Ceiling(($Size_O*1.01)+600) ; reserve some bytes accordingly to BZIP2 documentation
    
    $a_pBuffer = DllStructCreate('source byte[' & $Size_O & '];sourceLen uint;dest byte[' & $Size_R & '];destLen uint;blockSize100k int;verbosity int;workFactor int;')
    DllStructSetData($a_pBuffer, "source", $data)
    DllStructSetData($a_pBuffer, "sourceLen", $Size_O)
    DllStructSetData($a_pBuffer, "destLen", $Size_R)
    DllStructSetData($a_pBuffer, "blockSize100k", 9) ; this and below are default values in BZIP2 docs
    DllStructSetData($a_pBuffer, "verbosity", 0)
    DllStructSetData($a_pBuffer, "workFactor", 30)
    
    $dllres = DllCall($hBZDll, "int", "BZ2_bzBuffToBuffCompress", _
    "dest", DllStructGetPtr($a_pBuffer, "dest"), _
    "destLen", DllStructGetPtr($a_pBuffer, "destLen"), _ ; destLen is uint * type, so we need a pointer
    "source", DllStructGetPtr($a_pBuffer, "source"), _
    "sourceLen", DllStructGetData($a_pBuffer, "sourceLen"), _
    "blockSize100k", DllStructGetData($a_pBuffer, "blockSize100k"), _
    "verbosity", DllStructGetData($a_pBuffer, "verbosity"), _
    "workFactor", DllStructGetData($a_pBuffer, "workFactor"))
    
    MsgBox(0, "Error", "@error = " & @error & @CRLF & "@extended = " & @extended)
    
    $Size_C = DllStructGetData($a_pBuffer, "destLen")
    
    $Ret[0] = DllStructGetData($a_pBuffer, "dest")
    $Ret[1] = $Size_O
    $Ret[2] = $Size_C

    Return $ret

EndFunc   ;==>_CompressData


#cs
BZ2_bzBuffToBuffCompress function prototype on C++

int BZ2_bzBuffToBuffCompress( char*         dest,
                              unsigned int* destLen,
                              char*         source,
                              unsigned int  sourceLen,
                              int           blockSize100k,
                              int           verbosity,
                              int           workFactor );
#ce

 

 

What should I do with this error? Where am I wrong?

Thanks.

Edited by Hammerfist

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Hammerfist

And trancexx , I know about your Native API Compression =) Didn't use it due to low compression ratio - it's 34%. Btw $COMPRESSION_FORMAT_XPRESS_HUFF shows awesome 11% of compression, but I could not make it decompress the data.

_WinAPI_DecompressBuffer($a_pBuffer[0], $Size_O, $a_pBuffer[1], $Size_C, $COMPRESSION_FORMAT_XPRESS_HUFF) shows @error = 10 and @extended = c00000e8.

_WinAPI_CompressBuffer and _WinAPI_DecompressBuffer using the engine $COMPRESSION_FORMAT_XPRESS work very well, but if we add "_HUFF" it throws error.

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jchd

If the use is for compression of blob in SQLite storage and if you don't have concurency timing requirement, I'd develop an SQLite extension to compress/decompress data on the fly, keeping the applicative layer clean, simple, blindly ignorant of what's being done under its feet and avoiding manipulating data several times within AutoIt (forcibly slower than within C code).


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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Hammerfist

Can I write proper subroutines for SQLite using AutoIt? I think no.

And my app is kinda archive. It keeps a database in compressed state and extracts one blob of data on demand, one, two or ten times per day. So i can sacrifice some processor time at the import stage to reach maximum compression.

Applicative layer remains clean enough. I'll simply change the "$data = $uncompressed_blob" to "$data = _DB_UnpackBlob($compressed_blob)".

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jchd

Yes you can (create SQLite functions written in AutoIt) but it isn't worth the burden, especially in you "archive" use case.

When the expected benefit is large enough it's much better to write directly an extension function in C and load it at connection time, or auto-load it for all subsequent connections in the same run, or statically include it in a homebrew SQLite.dll build.

If ever you're interessed to add AutoIt functions as extensions to SQLite you can use this (posted on the French forum): https://autoitscript.fr/forum/viewtopic.php?f=21&t=13556&p=94618

  • Like 1

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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      Thanks,
      Mike
       
      ;Credentials Manager #include <array.au3> #include <WinAPI.au3> ;Needed for the _WinAPI_GetLastError() ;------------------------------------------------------------------------ ;----- Add items into the Credentials Store ---------------------------- ;------------------------------------------------------------------------ ;~ _Cred_Add("MyCredStored", "ItsMe", "Secret1", "", 1) ;Add a Local Credentials so we can test the retrieval of a password ;~ $aAddCred = _Cred_Add("MyServer", "Domain\adminAccount", "MyS3cr3+P@ssw0rd") ;Add domain Credentials that can only be used with RDP and other such items ;~ _ArrayDisplay($aAddCred, "AddCred") ;------------------------------------------------------------------------ ;------------------------------------------------------------------------ ;----- Retrieve Credentials from the Credentials Store ----------------- ;------------------------------------------------------------------------ ;~ $aCreds = _Cred_Get("MyServer", 2) ;Retrieve Domain Cred's, won't have password in it ;~ _ArrayDisplay($aCreds, "Credentials") $aCreds = _Credentials_Enumerate() ;Get a list of all credentials currently stored on the system **(DOES NOT WORK)** ;------------------------------------------------------------------------ ;------------------------------------------------------------------------ ;----- Delete a Credential from the Credentials Store ------------------ ;------------------------------------------------------------------------ ;~ _Cred_Delete("MyServer") ;Delete the specified item from the Credential Store ;~ For $d = 1 to UBound($aCreds) - 1 ;~ _Cred_Delete($aCreds[$d][0]) ;Loop to delete all items found. **(DOES NOT WORK)** ;~ Next ;------------------------------------------------------------------------ ;================================================================================================ ;===== Add a Credential into the Credentials Store ============================================= ;================================================================================================ Func _Cred_Add($sTarget, $sUser, $sPassword, $sComm = "", $iType = 2) ;Type: 2=Domain, 1=Local Local $structTarget = DllStructCreate("wchar[100]") ; Create a structure to hold the Target object name DllStructSetData($structTarget, 1, $sTarget) ; Insert the target name into that Structure Local $structUser = DllStructCreate("wchar[100]") ; Create a structure to hold the UserName to use DllStructSetData($structUser, 1, $sUser) ; Insert the user name into the structure Local $structPwd = DllStructCreate("wchar[100]") ; Create a structure to hole the password to use DllStructSetData($structPwd, 1, $sPassword) ; Insert the password into the structure Local $structComment = DllStructCreate("wchar[100]") ; I don't see where this is used, but was in all the examples DllStructSetData($structComment, 1, $sComm) Local $structCREDENTIAL= "" & _ "DWORD Flags;" & _ "DWORD Type;" & _ "Ptr TargetName;" & _ "Ptr Comment;" & _ "UINT64 LastWritten;" & _ "DWORD CredintialBlobSize;" & _ "Ptr CredentialBlob;" & _ "DWORD Persist;" & _ "DWORD AttributeCount;" & _ "ptr Attributes;" & _ "Ptr TargetAlias;" & _ "Ptr Username" Local $NewCred = DllStructCreate($structCREDENTIAL) If @error Then MsgBox(0, "NewCred", "Error in DllStructCreate " & @error); Exit EndIf DllStructSetData($NewCred,"Flags",0) DllStructSetData($NewCred,"Type",$iType) ;2 = Domain, 1 = Generic DllStructSetData($NewCred,"TargetName",DllStructGetPtr($structTarget)) DllStructSetData($NewCred,"Persist",3) DllStructSetData($NewCred,"AttributeCount",0) DllStructSetData($NewCred,"UserName",DllStructGetPtr($structUser)) DllStructSetData($NewCred,"CredentialBlob",DllStructGetPtr($structPwd)) DllStructSetData($NewCred,"CredintialBlobSize",StringLen($sPassword)*2) DllStructSetData($NewCred,"Comment",DllStructGetPtr($structComment)) Local $hAdvapi32 = DllOpen("Advapi32.dll") If $hAdvapi32 = -1 Then Msgbox(0, "Error", "Failed to connect to the Credentials Store") Exit Endif $Ret = DllCall($hAdvapi32, 'bool', 'CredWriteW', 'ptr', DllStructGetPtr($NewCred), 'dword', 0) $NewCred = 0 If IsArray($Ret) Then Return $Ret Else Return SetError(1) EndIf EndFunc ;_Cred_Add ;================================================================================================ ;===== Retrieve the Credentials for the specified item ========================================= ;================================================================================================ Func _Cred_Get($sTarget, $iType = 1) ;Type: 2=Domain, 1=Local. CAN'T RETURN DOMAIN PASSWORDS!!! Local $FuncRet[3] Local $structTarget = DllStructCreate("wchar[100]") DllStructSetData($structTarget,1,$sTarget) Local $hAdvapi32 = DllOpen("Advapi32.dll") If $hAdvapi32 = -1 Then Msgbox(0, "Error", "Failed to connect to the Credentials Store") Exit Endif Local $Ret = DllCall($hAdvapi32, 'bool', 'CredReadW', 'ptr', DllStructGetPtr($structTarget), 'dword', $iType, 'dword', 0, 'ptr*', 0) if $ret[0]=0 then Return SetError(1,0,$FuncRet) Local $structCREDENTIAL= "" & _ "DWORD Flags;" & _ "DWORD Type;" & _ "Ptr TargetName;" & _ "Ptr Comment;" & _ "UINT64 LastWritten;" & _ "DWORD CredintialBlobSize;" & _ "Ptr CredentialBlob;" & _ "DWORD Persist;" & _ "DWORD AttributeCount;" & _ "Ptr Attributes;" & _ "Ptr TargetAlias;" & _ "Ptr Username" Local $tdata=DllStructCreate($structCREDENTIAL, $Ret[4]) Local $userName = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'Username')) Local $User = DllStructGetData($userName, 1) Local $CredentialBlobSize = DllStructGetData($tdata, 'CredintialBlobSize') Local $credentialBlob = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'CredentialBlob')) Local $Password = StringLeft(DllStructGetData($credentialBlob, 1), $CredentialBlobSize/2) Local $Comment = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'Comment')) Local $Comm = DllStructGetData($Comment, 1) Dim $FuncRet[] = [$User, $Password, $Comm] Return $FuncRet EndFunc ;_Cred_Get ;================================================================================================ ;===== Delete a specified item from the Credentials Store ====================================== ;================================================================================================ Func _Cred_Delete($sTarget, $iType = 2) ;Type: 2=Domain, 1=Local Local $structTarget = DllStructCreate("wchar[100]") ;Create a structure to hold the object name we want to delete DllStructSetData($structTarget, 1, $sTarget) ;Insert the Object Name into the Structure Local $hAdvapi32 = DllOpen("Advapi32.dll") If $hAdvapi32 = -1 Then Msgbox(0, "Error", "Failed to connect to the Credentials Store") Exit Endif ;Now send all the info into the DLL to delete the item $Ret = DllCall($hAdvapi32, 'bool', 'CredDeleteW', 'ptr', DllStructGetPtr($structTarget), 'dword', $iType, 'dword', 0) ;$iType 2 = Domain, 1 = Local EndFunc ;_Cred_Delete ;================================================================================================ ;===== Return a 2D array with the Target, UserName, Password for every item ==================== ;===== in the Credentials Store ==================== ;================================================================================================ Func _Credentials_Enumerate() ;https://msdn.microsoft.com/en-us/library/windows/desktop/aa374794(v=vs.85).aspx ;https://www.autoitscript.com/forum/topic/99705-credenumerate-function-call/?do=findComment&comment=715159 Local $aResult Local $structCREDENTIAL = "DWORD Flags;" & _ "DWORD Type;" & _ "Ptr TargetName;" & _ "Ptr Comment;" & _ "UINT64 LastWritten;" & _ "DWORD CredintialBlobSize;" & _ "Ptr CredentialBlob;" & _ "DWORD Persist;" & _ "DWORD AttributeCount;" & _ "Ptr Attributes;" & _ "Ptr TargetAlias;" & _ "Ptr Username" $aResult = DllCall('advapi32.dll', 'int', 'CredEnumerateW', _ ;Call the Unicode version of CredEnumerate 'wstr', Null, _ ;Don't use any filter since I want everything returned 'uint', 1, _ ;1 = CRED_ENUMERATE_ALL_CREDENTIALS 'uint*', '', _ ;Return the Count of all stored credentials 'ptr*', '') ;Returns a pointer to an Array of pointers? If @error Or ($aResult[0] = 0) Then ConsoleWrite('Error: ' & @error & @TAB & 'Extended: ' & @extended & @CRLF) ConsoleWrite(_WinAPI_GetLastError() & @CRLF) ;1168 = Nothing matches the filter, 1312 = no credential set for this user, 1004 = Flag/Filter options are wrong Return SetError(1) EndIf ConsoleWrite("DllCall Returned = " & $aResult[0] & @CRLF & "Credential Count = " & $aResult[3] & @CRLF & "Pointer to Creds Array = " & $aResult[4] & @CRLF) For $c = 2 to $aResult[3] ;Create enough struct for each item in each credential found $structCREDENTIAL &= "DWORD Flags;" & _ "DWORD Type;" & _ "Ptr TargetName;" & _ "Ptr Comment;" & _ "UINT64 LastWritten;" & _ "DWORD CredintialBlobSize;" & _ "Ptr CredentialBlob;" & _ "DWORD Persist;" & _ "DWORD AttributeCount;" & _ "Ptr Attributes;" & _ "Ptr TargetAlias;" & _ "Ptr Username" Next Local $tdata = DllStructCreate($structCREDENTIAL, $aResult[4]) ;Insert all the data from the array of pointers into this struct Local $FullTarget = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'TargetName')) ;Create and Get the array storing TargetName Local $userName = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'Username')) ;Create and Get the array storing Username Local $CredentialBlobSize = DllStructGetData($tdata, 'CredintialBlobSize') ;Get the password blob Local $credentialBlob = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'CredentialBlob')) ;Create and get the password text Local $Comment = DllStructCreate("wchar[100]", DllStructGetData($tdata, 'Comment')) ;Don't see a need for comments ;Retrieve the data For $c = 1 to $aResult[3] Local $Target = DllStructGetData($FullTarget, $c) ;Retrieve the Target Name from the item # Local $User = DllStructGetData($userName, $c) ;Retrieve the User Name from the item # Local $Password = StringLeft(DllStructGetData($credentialBlob, $c), $CredentialBlobSize/2) ;Retrieve the password, Only works for 1, legacy. domain creds will not return passwords Local $Comm = DllStructGetData($Comment, $c) ;Don't need comments but getting it since it's in all the examples ConsoleWrite("Loop = " & $c & ": Target = " & $Target & ": UserName = " & $User & ": Comment = " & $Comm & @CRLF) Next If $aResult[3] > 0 Then $aCreds = DllCall('advapi32.dll', 'none', 'CredFree', 'ptr', $aResult[4]) ;This is just used to release the pointer. Call when done EndIf EndFunc ;_Credentials_Enumerate  
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