corgano Posted June 20, 2017 Share Posted June 20, 2017 Autoit has a feature where if you create a recursive function with no exit, it will limit how many times it recurses to 3898, then it exits the program. My question / feature request is A: How does autoit track this? Is there some kind of internal counter that +1 every time it enters a func and -1 every time it returns from one? And B: IF this counter exist, is there a way to access it? IF not, could it be made accessible with a @macro? 0x616e2069646561206973206c696b652061206d616e20776974686f7574206120626f64792c20746f206669676874206f6e6520697320746f206e657665722077696e2e2e2e2e Link to comment Share on other sites More sharing options...
jchd Posted June 20, 2017 Share Posted June 20, 2017 Things don't work that way. A fixed-size call stack is used and is consumed by function calls, each eating a variable (I guess) amount of stack space depending on parameters. There is nothing under your control here. If you expect to exhaust stack space by recursion, then de-recurse your algorithm(s). 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 hereRegExp tutorial: enough to get startedPCRE 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) Link to comment Share on other sites More sharing options...
corgano Posted June 21, 2017 Author Share Posted June 21, 2017 It's not that I'm having the problem in particular, I was just wondering how autoit keeps track. So in that case, even a string of non-recursive functions long enough could trigger the same limit? Cool. 0x616e2069646561206973206c696b652061206d616e20776974686f7574206120626f64792c20746f206669676874206f6e6520697320746f206e657665722077696e2e2e2e2e Link to comment Share on other sites More sharing options...
jchd Posted June 21, 2017 Share Posted June 21, 2017 That would be a huge function call depth! I can't imagine such a situation being any close to the real world. 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 hereRegExp tutorial: enough to get startedPCRE 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) Link to comment Share on other sites More sharing options...
Gianni Posted June 21, 2017 Share Posted June 21, 2017 #cs A function is recursive when the same Func runs many times, self called from within itself. Variables declared as Global at the top of the script are able to be accessed from any instance of the function, whereas variables declared (as Local) within the function may be different for each instance of the function. so simply declare a Global var to keep track of the recursion level. (Increment that variable at the start of the function) #ce Global $iRecursionLevel = 0 ; global variable accessible from any instance ConsoleWrite("Entering recursion" & @CRLF & "------------------" & @CRLF) _Recursive() ConsoleWrite("------------------" & @CRLF & "Recursion finished. Bye" & @CRLF) Func _Recursive($iPreviousLevel = 0) $iRecursionLevel += 1 ; keep track of the recursion level (global variable) ; following variables are recreated for each instance Local $sTime = @HOUR & ":" & @MIN & ":" & @SEC Local $iInstance = $iRecursionLevel ConsoleWrite("Message from instance " & $iInstance & " entered at " & $sTime & @CRLF) Sleep(1500) ; recurse for max 8 levels deep If $iPreviousLevel < 7 Then _Recursive($iInstance) ; --- recursion ---> ; we are here when exiting from previous recursions Sleep(500) ConsoleWrite("This is instance " & $iInstance & ". I was called at " & $sTime & @CRLF) EndFunc ;==>_Recursive Chimp small minds discuss people average minds discuss events great minds discuss ideas.... and use AutoIt.... Link to comment Share on other sites More sharing options...
Developers Jos Posted June 21, 2017 Developers Share Posted June 21, 2017 (edited) I would simply go for this taking @Chimp's example: #cs A function is recursive when the same Func runs many times, self called from within itself. Variables declared as Global at the top of the script are able to be accessed from any instance of the function, whereas variables declared (as Local) within the function may be different for each instance of the function. so simply declare a Global var to keep track of the recursion level. (Increment that variable at the start of the function) #ce Global $iRecursionLevel = 0 ; global variable accessible from any instance ConsoleWrite("Entering recursion" & @CRLF & "------------------" & @CRLF) _Recursive() ConsoleWrite("------------------" & @CRLF & "Recursion finished. Bye" & @CRLF) Func _Recursive() $iRecursionLevel += 1 ; keep track of the recursion level (global variable) ; following variables are recreated for each instance Local $sTime = @HOUR & ":" & @MIN & ":" & @SEC ConsoleWrite("Message from instance " & $iRecursionLevel & " entered at " & $sTime & @CRLF) Sleep(1500) ; recurse for max 8 levels deep If $iRecursionLevel < 7 Then _Recursive() ; --- recursion ---> ; we are here when exiting from previous recursions Sleep(500) ConsoleWrite("This is instance " & $iRecursionLevel & ". I was called at " & $sTime & @CRLF) $iRecursionLevel -= 1 ; keep track of the recursion level (global variable) EndFunc ;==>_Recursive Jos Edited June 21, 2017 by Jos SciTE4AutoIt3 Full installer Download page - Beta files Read before posting How to post scriptsource Forum etiquette Forum Rules Live for the present, Dream of the future, Learn from the past. Link to comment Share on other sites More sharing options...
Danyfirex Posted June 21, 2017 Share Posted June 21, 2017 You also can use a Local Static variable. Saludos Danysys.com AutoIt... UDFs: VirusTotal API 2.0 UDF - libZPlay UDF - Apps: Guitar Tab Tester - VirusTotal Hash Checker Examples: Text-to-Speech ISpVoice Interface - Get installed applications - Enable/Disable Network connection PrintHookProc - WINTRUST - Mute Microphone Level - Get Connected NetWorks - Create NetWork Connection ShortCut Link to comment Share on other sites More sharing options...
Bowmore Posted June 21, 2017 Share Posted June 21, 2017 (edited) This is how you do it. An example of where a static local is really useful _MyRecusiveFunction(20,True) _MyRecusiveFunction(10,True) Func _MyRecusiveFunction($MaxRecursion = 100,$bReset = false) Static Local $iRecursionCount If $bReset Then $iRecursionCount = 0 If $iRecursionCount >= $MaxRecursion Then Return $iRecursionCount += 1 ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $iRecursionCount = ' & $iRecursionCount & @CRLF & '>Error code: ' & @error & @CRLF) ;### Debug Console _MyRecusiveFunction($MaxRecursion) EndFunc Edit: Change to allow the count to be reinitialised Edit: Changed name of function to reflect the purpose of the example as jchd pointed out, below, the original name (_MyIterativeFunction) I used was a poor and misleading choice on my part.. Edited June 21, 2017 by Bowmore "Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the universe trying to build bigger and better idiots. So far, the universe is winning."- Rick Cook Link to comment Share on other sites More sharing options...
jchd Posted June 21, 2017 Share Posted June 21, 2017 Nitpick: the above function name is a poor choice since it isn't iterative but recursive. 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 hereRegExp tutorial: enough to get startedPCRE 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) Link to comment Share on other sites More sharing options...
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