Jump to content
Sign in to follow this  
Zedna

FileReadLastChars

Recommended Posts

Zedna

#include <WinAPI.au3>

$text = FileReadLastChars("C:\Program Files\AutoIt3\Include\Array.au3", 1024)
MsgBox(0, 'FileReadLastChars', $text)

Func FileReadLastChars($sFile, $nChars)
    Local $nBytes
    $tBuffer = DLLStructCreate("char["&$nChars&"]")
    $hFile = _WinAPI_CreateFile($sFile, 2, 2) ; open for read
    _WinAPI_SetFilePointer($hFile, -1 * $nChars, 2) ; from end
    _WinAPI_ReadFile($hFile, DLLStructGetPtr($tBuffer), $nChars, $nBytes)
    _WinAPI_CloseHandle($hFile)
    Return DLLStructGetData($tBuffer, 1)
EndFunc

; included as standard UDF since AutoIt 3.2.13.6 version
Func _WinAPI_SetFilePointer($hFile, $iPos, $iMethod = 0)
    $aResult = DllCall( "kernel32.dll", "long", "SetFilePointer", "hwnd", $hFile, "long", $iPos, "long_ptr", 0, "long", $iMethod)
    If @error Then Return SetError(1, 0, -1)
    If $aResult[0] = -1 Then Return SetError(2, 0, -1) ; $INVALID_SET_FILE_POINTER = -1
    Return $aResult[0]
EndFunc ;==>_WinAPI_SetFilePointer

Here is my topic about _WinAPI_SetFilePointer()

'?do=embed' frameborder='0' data-embedContent>>

Edited by Zedna

Share this post


Link to post
Share on other sites
LarsJ
guinness

Thanks Zedna. Here is a native version...
 

#include <FileConstants.au3>
#include <MsgBoxConstants.au3>

Global Enum Step * 2 $FRLC_FILENOTEXISTS, $FRLC_ISNOTDIGIT, $FRLC_OUTOFBOUNDS, $FRLC_ENDOFFILE

Local $sText = FileReadLastChars(@ScriptFullPath, 204)
ConsoleWrite('@error: ' & @error & ', Text: ' & $sText & @CRLF)
MsgBox($MB_SYSTEMMODAL, 'FileReadLastChars', $sText)

Func FileReadLastChars($sFilePath, $iChars) ; Idea by Zedna, created by guinness
    Local $sData = ''
    Local $hFileOpen = FileOpen($sFilePath, $FO_READ)
    If $hFileOpen = -1 Then Return SetError($FRLC_FILENOTEXISTS, 0, $sData) ; If the file doesn't exist or an unexpected error occurred
    If IsString($iChars) Then ; If $iChars happens to be a string
        If Not StringIsDigit($iChars) Then
            FileClose($hFileOpen)
            Return SetError($FRLC_ISNOTDIGIT, 0, $sData) ; If not an string representing an integer then set an @error
        EndIf
        $iChars = Int($iChars) ; Parse as an integer
    EndIf

    If $iChars <= 0 Or $iChars > FileGetSize($sFilePath) Then
        FileClose($hFileOpen)
        Return SetError($FRLC_OUTOFBOUNDS, 0, $sData) ; If less than or equal to zero or greater than the file size
    EndIf

    If FileSetPos($hFileOpen, -1 * $iChars, $FILE_END) Then
        $sData = FileRead($hFileOpen, $iChars) ; Read the file based on the position and number of chars
        If @error Then
            FileClose($hFileOpen)
            Return SetError($FRLC_ENDOFFILE, 0, $sData)
        EndIf
    EndIf

    FileClose($hFileOpen)
    Return $sData
EndFunc   ;==>FileReadLastChars

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

Share this post


Link to post
Share on other sites
iamtheky

msgbox(0, '' , _FileReadLastChar(@ScriptFullPath , 7))

Func _FileReadLastChar($file , $count)
    $hFile = FileOpen($file)
    $pos = FileSetPos($hFile , $count * -1 , 2)
    $sOut = FileRead($hFile)
    return $sOut
EndFunc

Edited by boththose

,-. .--. ________ .-. .-. ,---. ,-. .-. .-. .-.
|(| / /\ \ |\ /| |__ __||| | | || .-' | |/ / \ \_/ )/
(_) / /__\ \ |(\ / | )| | | `-' | | `-. | | / __ \ (_)
| | | __ | (_)\/ | (_) | | .-. | | .-' | | \ |__| ) (
| | | | |)| | \ / | | | | | |)| | `--. | |) \ | |
`-' |_| (_) | |\/| | `-' /( (_)/( __.' |((_)-' /(_|
'-' '-' (__) (__) (_) (__)

Share this post


Link to post
Share on other sites
guinness

Learn how to error check, especially when you're creating a UDF.

 

msgbox(0, '' , _FileReadLastChar(@ScriptFullPath , 7))

Func _FileReadLastChar($file , $count)
    $hFile = FileOpen($file)
    $pos = FileSetPos($hFile , $count * -1 , 2)
    $sOut = FileRead($hFile)
    return $sOut
EndFunc

This is wrong. Please read the help file again as cleaning up resources is important. Edited by guinness

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

Share this post


Link to post
Share on other sites
iamtheky

Good thing I wasnt making a UDF, and only clearly showing concept.  And it gives the correct answer every time in reasonable tests.  Checks are sure in order for exceeding bounds, and  I'm sure in production they would close the handle.

Exit, 

that is more,    _FileReadTheWholeThing_ThenReturnTheLastChars

Edited by boththose

,-. .--. ________ .-. .-. ,---. ,-. .-. .-. .-.
|(| / /\ \ |\ /| |__ __||| | | || .-' | |/ / \ \_/ )/
(_) / /__\ \ |(\ / | )| | | `-' | | `-. | | / __ \ (_)
| | | __ | (_)\/ | (_) | | .-. | | .-' | | \ |__| ) (
| | | | |)| | \ / | | | | | |)| | `--. | |) \ | |
`-' |_| (_) | |\/| | `-' /( (_)/( __.' |((_)-' /(_|
'-' '-' (__) (__) (_) (__)

Share this post


Link to post
Share on other sites
Zedna


What is the advantage of this rather than using the built-in commands?

 

My function (using Win32 API) is the only one which works with old AutoIt 3.2.12.1 which is my main AutoIt's version.

Native FileSetPos() function and even _WinAPI_SetFilePointer() were introduced later.

Edited by Zedna

Share this post


Link to post
Share on other sites
LarsJ

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Similar Content

    • dadalt95
      By dadalt95
      Hi!
      I want to get the signal in this website:
      https://binary-signal.com/pt/chart/eurusd
      I have tried using _IEBodyReadText  and some _StringBetween. What happens is that the text are being update every tick and _IEBodyReadText doesn't.
      To perform the update I used  _IEAction($oIE, "refresh") but it's not good because the website block me after some time due too many requests..
      Is there any other way to get this text every tick?
      PS: The text I want to get is WAIT, CALL or PUT.
       
      Here is the code:
      global $oIE = _IECreate ('https://binary-signal.com/pt/chart/eurusd', 0, 1 , 1 , 0) Local $sText = _IEBodyReadText($oIE) $result = _StringBetween ( $sText , 'PUTEUR/USD on Binary-signal.com', 'sinal está PRONTA') ;MsgBox ( 0, "asf", $result[0]) $espera=StringInStr($result[0], "WAIT") $compra=StringInStr($result[0], "CALL") $venda=StringInStr($result[0], "PUT") ;MsgBox($MB_SYSTEMMODAL, "", $espera) $n=0 $c=0 Captar() Func Captar() ;_IENavigate($oIE, "https://binary-signal.com/pt/chart/eurusd") ;MsgBox($MB_SYSTEMMODAL, "", $n) Local $sText = _IEBodyReadText($oIE) $result = _StringBetween ( $sText , 'PUTEUR/USD on Binary-signal.com', 'sinal está PRONTA') If (Not $compra=0) And $n=0 Then MsgBox($MB_SYSTEMMODAL, "", "COMPRE") $n=1 $c=$c+1 ;_IEAction($oIE, "refresh") Sleep(60000) Captar() ElseIf (Not $venda=0) And $n=0 Then MsgBox($MB_SYSTEMMODAL, "", "VENDA") $c=$c+1 $n=1 ;_IEAction($oIE, "refresh") ;MsgBox($MB_SYSTEMMODAL, "", $n) Sleep(60000) Captar() ElseIf (Not $venda=0) And $n=1 Then ;MsgBox($MB_SYSTEMMODAL, "", "Esperando próxima rodada") $n=1 ;MsgBox($MB_SYSTEMMODAL, "", $n) ;_IEAction($oIE, "refresh") Sleep(60000) Captar() ElseIf (Not $venda=0) And $n=1 Then ;MsgBox($MB_SYSTEMMODAL, "", "Esperando próxima rodada") $n=1 ;MsgBox($MB_SYSTEMMODAL, "", $n) ;_IEAction($oIE, "refresh") Sleep(60000) Captar() Else ;MsgBox("", "", "ESPERE") $n=0 Sleep(1000) ;_IEAction($oIE, "refresh") Local $sText = _IEBodyReadText($oIE) $result = _StringBetween ( $sText , 'PUTEUR/USD on Binary-signal.com', 'sinal está PRONTA') Captar() EndIf EndFunc  
    • Trisha
      By Trisha
      Hello,
      I Have clicked on save as option to save a file, while doing that I need to rename a file appending with sysdate. I have searched in google find the below one line of code:
      FileMove("C:\somefile.txt", "C:\somefile1.txt"), When I am trying to append with sysdate. It is not happening. Please help me out  with the small issue.
    • lewisg
      By lewisg
      Suddenly a RunWait command has stop working after 2 years of no errors, issues, or problems. The code uses RunWait to start Plink.exe, a command-line remote connection tool similar to UNIX ssh. I'm using it to ssh to a linux (Centos) machine, run a Perl script, and redirect the output to a file on a PC running the AutoIt script.  
       
      $FilePath = "C:\AutoIT\LED" $FilePathPlus = $FilePath & "\plink.exe" $Code1 = RunWait(@ComSpec & " /c " & $FilePathPlus & " -ssh -l root -pw ?????? 10.170.4.163 /usr/local/nagios/etc/led.pl > C:\AutoIT\LED\led.txt ", @SW_SHOW) ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : @ComSpec & " /c " & $FilePathPlus & " -ssh -l root -pw ????? 10.170.4.163 /usr/local/nagios/etc/led.pl > C:\AutoIT\LED\led.txt " = ' & @ComSpec & " /c " & $FilePathPlus & " -ssh -l root -pw ?????? 10.170.4.163 /usr/local/nagios/etc/led.pl > C:\AutoIT\LED\led.txt " & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console The ConsoleWrite output when cut-n-pasted into a DOS box produces the expected file so I know it works. I've also tried many variations of the function moving, adding, and changing the " and ' (quote) marks. Also tried it without the @ComSpec macro and other related functions...e.g.  ShellExecuteWait , etc.
      The PC is a Windows 10 64bit and AutoIT is version 3.3.14.2.
      Searching here and Google has not yielded any clues that helped. 
    • xEviiLx
      By xEviiLx
      I'm trying to read value of a base pointer + offset.
      With only address I can easily the value but with base addres (pointer) I really don't know how I can do that.
       
    • rudi
      By rudi
      Hello.
      I'm too stupid to see my mistake:
      To investigate the internal "dictionary" of TIFF files I'd like to read in the files in binary mode and to check, if there are more than one pages "in" this TIFF.
      Notepad++, "View as Hex" is presenting the first bytes as "49 49 2a 20 08 20 20 20 12" for the TIF attached to this posting
      The "TIFF Header Format" is easy:
      Offset 00h, 2 Byte = Byte Order, "II"=intel, "MM"=motorola. (I = 0x49)
      --> II
      Offset 02h, 2 Byte = Version Nr.
      Offset 04h, 4 Byte = pointer to first IFD entry
      Description of TIFF header: https://www.awaresystems.be/imaging/tiff/faq.html#q3
       

      Howto read and analyse the binary content correctly? This is my messy, not operational code:
       
      $sampleTiff="H:\daten\tif\11\11\111111.TIF" $h=FileOpen($sampleTiff,16) $content=FileRead($h) ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $content = ' & $content & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console FileClose($h) $type=VarGetType($content) ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $type = ' & $type & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console $ToString=BinaryToString($content) ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $ToString = ' & $ToString & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console ConsoleWrite(@CRLF & @CRLF) $content=StringTrimLeft($content,2) ; cut off the leading "0x" ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $content = ' & $content & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console for $i = 1 to 8 step 8 $next=StringMid($content,$i,2) ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $next = ' & $next & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console $Chr=BinaryToString($next) ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $Chr = ' & $Chr & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console ConsoleWrite(@CRLF & "---" & @CRLF) Next Regards, Rudi.
      111111.TIF
×