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  • C++/MFC: Handling multiple CListCtrl's headers HDN_ITEMCLICK events

    - by raph.amiard
    I'm coding an MFC application in which i have a dialog box with multiple CListCtrls in report view. I want one of them to be sortable. So i handled the HDM_ITEMCLICK event, and everything works just fine .. Except that if i click on the headers of another CListCtrl, it does sort the OTHER CListCtrl, which does look kind of dumb. This is apparently due to the fact that headers have an ID of 0, which make the entry in the message map look like this : ON_NOTIFY(HDN_ITEMCLICK, 0, &Ccreationprogramme::OnHdnItemclickList5) But since all the headers have an id of zero, apparently every header of my dialog sends the message. Is there an easy way around this problem ?

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  • Difference between BOOST_CHECK_CLOSE and BOOST_CHECK_CLOSE_FRACTION?

    - by Rhys Ulerich
    Can anyone describe the difference in behavior between BOOST_CHECK_CLOSE and BOOST_CHECK_CLOSE_FRACTION? The documentation implies the that both macros treat their third parameter identically, which makes me suspect the documentation is wrong. In particular, BOOST_CHECK_CLOSE_FRACTION gives me some odd looking results: error in "...": difference between *expected{0} and *actual{-1.7763568394002506e-16} exceeds 9.9999999999999995e-07 Is there a gotcha because I expect a zero result? I've not been successful at reading through the underlying macro declarations. Please note BOOST_CHECK_SMALL isn't appropriate for my use case (comparing two vectors after a linear algebra operation).

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  • Large Scale VHDL techniques

    - by oxinabox.ucc.asn.au
    I'm thinking about implimenting a 16 bit CPU in VHDL. A simplish CPU. ADD, MULS, NEG, BitShift, JUMP, Relitive Jump, BREQ, Relitive BREQ, i don't know somethign along these lines Probably all only working with 16bit operands. I might even cut it down and use only a single operand and a accumulator. With Some status regitsters, Carry, Zero, Neg (unless i use a Accumlator), I know how to design all the parts from logic gates, and plan to build them up from first priciples, So for my ALU I'll need to 'build' a ADDer, proably a Carry Look ahead, group adder, this adder it self is make up oa a couple of parts, wich are themselves made up of a couple of parts. Anyway, my problem is not the CPU design, or the VHDL (i know the language, more or less). It's how i should keep things organised. How should I use packages, How should I name my processes and port maps? (i've never seen the benifit of naming the port maps, or processes)

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  • Is it safe to buy a replacement laptop battery that has slightly different voltage than the original?

    - by Hugoagogo
    I'm looking for a new battery for my Acer Aspire 4741g laptop. I am trying to get a higher capacity battery. Many sites (like this one and this one) list batteries that are interchangeable with the battery that came with the laptop (AS10D41). These batteries have higher capacity, but also marginally lower voltage (11.1V vs. 11.8V). Is this a problem? Does it mean that the battery is actually incompatible? The replacement battery I am looking at is AS10G3E, and is listed in many places as being compatible with the AS10D41, but nobody makes any mention of the differing voltages. I am trying to find out what kind of problems a lower voltage battery can cause. I know P=IV; with reduced voltage, will the machine draw more current, possibly damaging components? I'm just speculating, but I'm worried about the chance that using a battery at a lower voltage will damage my laptop.

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  • "sh: /usr/sbin/xenstored: not found" - But it's there?

    - by Matt H
    What would cause running the file /usr/sbin/xenstored to print sh: /usr/sbin/xenstored: not found However, the file /usr/sbin/xenstored is there and is not a symbolic link. Actually I should be running this as root. That prints a similarly odd message. sudo: unable to execute /usr/sbin/xenstored: No such file or directory By the way, xenstored is not a script, it's an ELF executable. My guess is that it's because I haven't gotten all the dependent libraries installed. However, I would expect it to say something like this: ./xenstored: error while loading shared libraries: libxenctrl.so.4.0: cannot open shared object file: No such file or directory Which is true of running xenstored on a system that doesn't have all the required libraries. Why do I get "not found" vs the much more useful "cannot open shared object file"?

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  • animate rotation

    - by Mike
    I'm trying to animate a rotation using CATransform3DMakeRotation, but the problem is once the animation is finished, the image goes back to its initial position, i.e back to zero. But I'd like to keep it where it finished rotating. How would I do that? edit What I'm trying to do is to create the same compass which comes with the new iPhone. Basically the locationmanager gives me new headings every few seconds (or several per second). Using the new heading and the timestamp, I was trying to get a smooth animation of the image but not getting anywhere. The only thing which seems to work is applying the transform directly, e.g. compassimage.layer.transform = CATransform3DMakeRotation(newHeading.trueHeading *M_PI/180,0,0,1.0): but that's not animated...

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  • PowerShell 2.0 and how to handle exceptions ?

    - by Primoz
    Why I get error message printed on the console when running these two simple samples ? I want that I get "Error testing :)" printed on the console insted of: Get-WmiObject : The RPC server is unavailable. (Exception from HRESULT: 0x800706BA) At line:3 char:15 + Get-WmiObject <<<< -ComputerName possibly.nonexisting.domain.com -Credential (Get-Credential) -Class Win32_logicaldisk + CategoryInfo : InvalidOperation: (:) [Get-WmiObject], COMException + FullyQualifiedErrorId : GetWMICOMException,Microsoft.PowerShell.Commands.GetWmiObjectCommand or Attempted to divide by zero. At line:3 char:13 + $i = 1/ <<<< 0 + CategoryInfo : NotSpecified: (:) [], ParentContainsErrorRecordException + FullyQualifiedErrorId : RuntimeException First example: try { $i = 1/0 Write-Host $i } catch [Exception] { Write-Host "Error testing :)" } Second example: try { Get-WmiObject -ComputerName possibly.nonexisting.domain.com -Credential (Get-Credential) -Class Win32_logicaldisk } catch [Exception] { Write-Host "Error testing :)" } Thank you very much!

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  • Is there no such thing as a Gigabit switch?

    - by Torben Gundtofte-Bruun
    According to the manufacturer specification, even my rather plain desktop computer has "Gigabit Ethernet". So when I want to copy large files over the LAN (not Internet) it would make sense to have a gigabit switch. I'm searching eBay for a gigabit switch for a planned home network upgrade. The products I find are all labeled "gigabit" but they all have 24 x 10/100Mbit autosensing ports and sometimes 2 x 10/100/1000Mbit autosensing ports. It was my understanding that 10/100 is ancient and that modern computers have network interfaces that work with 1000Mbit, so it would make sense to get a switch that has 24 x 1000Mbit ports. Did I misunderstand, or are sellers (deliberately?) mislabeling older hardware? (Let's not dive into wired vs. wireless networks and how "N" wireless is fast. You'd be right, but not answering the question.)

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  • PHP regular expression

    - by Ferol
    such text: $text = ' href="http://yahoo.com" target="_blank"> link text </a> text... text... <br> text...'; // $text = ' text... <a href="http://yahoo.com" target="_blank"> link text </a> text... text... <br> text...'; and such regular expression: preg_match_all('/^(.*)(<.+>)(.*)(<\/.+>)(.*)$/',$text,$matches); what I want, - to check if text matches the regular expression. If yes, then $matches should contain parts of string above, if not (as I guess) it should contain four zero-length arrays. something is wrong, but I can't find, what actually is?

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  • Clojure: Avoiding stack overflow in Sieve of Erathosthene?

    - by nixx
    Here's my implementation of Sieve of Erathosthene in Clojure (based on SICP lesson on streams): (defn nats-from [n] (iterate inc n)) (defn divide? [p q] (zero? (rem q p))) (defn sieve [stream] (lazy-seq (cons (first stream) (sieve (remove #(divide? (first stream) %) (rest stream)))))) (def primes (sieve (nats-from 2))) Now, it's all OK when i take first 100 primes: (take 100 primes) But, if i try to take first 1000 primes, program breaks because of stack overflow. I'm wondering if is it possible to change somehow function sieve to become tail-recursive and, still, to preserve "streamnes" of algorithm? Any help???

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  • Does margin-left:2px; render faster than margin:0 0 0 2px;?

    - by Christopher Altman
    Douglas Crockford describes the consequence of Javascript inquiring a node's style. How simply asking for the margin of a div causes the browser to 'reflow' the div in the browser's rendering engine four times. So that made me wonder, during the initial rendering of a page (or in Crockford's jargon a "web scroll") is it faster to write CSS that defines only the non-zero/non-default values? To provide an example: div{ margin-left:2px; } Than div{ margin:0 0 0 2px; } I know consequence of this 'savings' is insignificant, but I think it is still important to understand how the technologies are implemented. Also, this is not a question about formatting CSS--this is a question about the implementations of browsers rendering CSS. Reference: http://developer.yahoo.com/yui/theater/video.php?v=crockonjs-4

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  • Attempting to install .NET framework 4 *full* installs *client* instead

    - by msorens
    On a Win7 SP1 32-bit machine, I initially had .NET 4 client installed and wanted to upgrade to .NET 4 full. I downloaded the full installer dotNetFx40_Full_x86_x64.exe from Microsoft. After download the file showed 48.11MB, the correct size for the full package (vs. 41MB for the client). I ran the installer and it first prompted to repair or remove the existing package. I chose to remove, so uninstalled the two parts, 4 extended and 4 client. Reboot. I reran the installer and it began installation, showing that it was installing the client. Though this raised an eyebrow for me, I let it run to completion, thinking it might be reporting the full install in sections. But after completion, I again ended up with 4 extended and 4 client installed! Obviously I am missing something; ideas...?

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  • WP7: play MP3 using Media with phonegap/Cordova

    - by Loda
    My problem: I use the Media Class from Cordova. The MP3 file is only played once (the first time). Code: Add this code to the Cordova Starter project to reproduce my problem: var playCounter = 0; function playMP3(){ console.log("playMP3() counter " + playCounter); var my_media = new Media("app/www/test.mp3");//ressource buildAction == content my_media.play(); playCounter++; } [...] <p onclick="playMP3();">Click to Play MP3</p> VS output: [...] GapBrowser_Navigated :: /app/www/index.html 'UI Task' (Managed): Loaded 'System.ServiceModel.Web.dll' 'UI Task' (Managed): Loaded 'System.ServiceModel.dll' Log:"onDeviceReady. You should see this message in Visual Studio's output window." 'UI Task' (Managed): Loaded 'Microsoft.Xna.Framework.dll' Log:"playMP3() counter 0" 'UI Task' (Managed): Loaded 'System.SR.dll' Log:"media on status :: {\"id\": \"fa123123-bc55-a266-f447-8881bd32e2aa\", \"msg\": 1, \"value\": 1}" A first chance exception of type 'System.ArgumentException' occurred in mscorlib.dll Log:"media on status :: {\"id\": \"fa123123-bc55-a266-f447-8881bd32e2aa\", \"msg\": 1, \"value\": 2}" Log:"media on status :: {\"id\": \"fa123123-bc55-a266-f447-8881bd32e2aa\", \"msg\": 2, \"value\": 2.141}" Log:"media on status :: {\"id\": \"fa123123-bc55-a266-f447-8881bd32e2aa\", \"msg\": 1, \"value\": 4}" Log:"playMP3() counter 1" A first chance exception of type 'System.ArgumentException' occurred in mscorlib.dll A first chance exception of type 'System.IO.IOException' occurred in mscorlib.dll A first chance exception of type 'System.IO.IsolatedStorage.IsolatedStorageException' occurred in mscorlib.dll Log:"media on status :: {\"id\": \"2de3388c-bbb6-d896-9e27-660f1402bc2a\", \"msg\": 9, \"value\": 5}" My Config: cordova-1.6.1.js Lumia 800 WP 7.5 (7.10.7740.16) WorkAround (kind of): Desactivate the app (turn off the screen) reactivate the app (turn on the screen) - you get one more shot. Any help is welcome as I am blocked on this since may days and I found no usefull information anywhere. Also, Can you tell me if this code work on your config ? . . . Update: add a demo code using a global var. Keeping the instance alive. result The test2.mp3 is played and can replay fine. the test.mp3 is not played at all. It is the first file you play that will work. Code function onDeviceReady() { document.getElementById("welcomeMsg").innerHTML += "Cordova is ready! version=" + window.device.cordova; console.log("onDeviceReady. You should see this message in Visual Studio's output window."); my_media = new Media("app/www/test.mp3");//ressource buildAction == content my_media2 = new Media("app/www/test2.mp3");//ressource buildAction == content } var playCounter = 0; var my_media = null; function playMP3(){ console.log("playMP3() counter " + playCounter); my_media.play(); playCounter++; } var my_media2 = null; function playMP32(){ console.log("playMP32() counter " + playCounter); my_media2.play(); playCounter++; } </script> [...] <p onclick="playMP3();">Click to Play MP3</p> <p onclick="playMP32();">Click to Play MP3 2</p> VS output: Log:"onDeviceReady. You should see this message in Visual Studio's output window." INFO: startPlayingAudio could not find mediaPlayer for 71888b14-86fe-4769-95c9-a9bb05d5555b Log:"playMP32() counter 0" INFO: startPlayingAudio could not find mediaPlayer for 71888b14-86fe-4769-95c9-a9bb05d5555b Log:"playMP32() counter 1" Log:"playMP3() counter 2" INFO: startPlayingAudio could not find mediaPlayer for b60fa266-d105-a295-a5be-fa2c6b824bc1 A first chance exception of type 'System.ArgumentException' occurred in System.Windows.dll Error: El parámetro es incorrecto. Log:"playMP32() counter 3" INFO: startPlayingAudio could not find mediaPlayer for 71888b14-86fe-4769-95c9-a9bb05d5555b Can anybody reproduce this ? link to bug report: https://issues.apache.org/jira/browse/CB-941

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  • Using a ControlParameter in FilterParameters when the property is null

    - by end-user
    I have a DataList and FormView; they have separate datasources, though they pull the same info. The FormView's datasource has a FilterExpression to pull whatever's been selected on the DataList. On first load, the SelectedValue of the DataList is null (naturally). I expect the FilterExpression to result in zero rows, but it doesn't. If I set the DefaultValue to 0, it does, but then the parameter never updates when I select something from the DataList. Am I doing it wrong?

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  • Selecting a specific div from a extern webpage using CURL

    - by Paulo
    Hi can anyone help me how to select a specific div from the content of a webpage. Say i want to get the div with id="body" from webpage http://www.test.com/page3.php My current code looks something like this: (not working) //REG EXP. $s_searchFor = '@^/.dont know what to put here..@ui'; //CURL $ch = curl_init(); $timeout = 5; // set to zero for no timeout curl_setopt ($ch, CURLOPT_URL, 'http://www.test.com/page3.php'); curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); if(!preg_match($s_searchFor, $ch)) { $file_contents = curl_exec($ch); } curl_close($ch); // display file echo $file_contents; So i'd like to know how i can use reg expressions to find a specific div and how to unset the rest of the webpage so that $file_content only contains the div.

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  • Dynamically removing records when certain columns = 0; data cleansing

    - by cdburgess
    I have a simple card table: CREATE TABLE `users_individual_cards` ( `id` int(11) NOT NULL AUTO_INCREMENT, `user_id` char(36) NOT NULL, `individual_card_id` int(11) NOT NULL, `own` int(10) unsigned NOT NULL, `want` int(10) unsigned NOT NULL, `trade` int(10) unsigned NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `user_id` (`user_id`,`individual_card_id`), KEY `user_id_2` (`user_id`), KEY `individual_card_id` (`individual_card_id`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1; I have ajax to add and remove the records based on OWN, WANT, and TRADE. However, if the user removes all of the OWN, WANT, and TRADE cards, they go to zero but it will leave the record in the database. I would prefer to have the record removed. Is checking after each "update" to see if all the columns = 0 the only way to do this? Or can I set a conditional trigger with something like: //psuedo sql AFTER update IF (OWN = 0, WANT = 0, TRADE = 0) DELETE What is the best way to do this? Can you help with the syntax?

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  • best way to get new access_token using PHP sdk

    - by randy
    I am getting the error "An active access token must be used to query information about the current user". There seems to be tons of articles and ideas, but am very confused and it seems that things are changing as well. A lot say to use offline-access but that appears to be going away. I did find this article. Does anyone have an example using the PHP SDK? I tried doing something like the below but it does not seem to work; $FBuser is still zero: $token_url = "https://graph.facebook.com/oauth/access_token?" . "client_id=" . FB_APP_ID . "&client_secret=" . FB_APP_SECRET . "&grant_type=client_credentials"; list($name, $ACCESS_TOKEN) = explode("=", file_get_contents($token_url) ); $facebook->setAccessToken(ACCESS_TOKEN); $FBuser = $facebook->getUser();

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  • C# failing LDAP queries

    - by jpkomick
    I'm trying to access an LDAP directory via the SearchRequest object in C#. I can make the same calls via an LDAP library running in and iPhone app, as well as directly via a terminal session. However, the C# queries all seem to fail. var search = new SearchRequest("ou=calendar,dc=ualberta,dc=ca", "term=*,course=094398,class=*", System.DirectoryServices.Protocols.SearchScope.Subtree, attributeLst); This returns a list of terms for the course calendar. However, making the following calls won't return results for specific courses var search = new SearchRequest("ou=calendar,dc=ualberta,dc=ca", "term=1330,course=094398", System.DirectoryServices.Protocols.SearchScope.Subtree, attributeLst); The attributeLst object has proper attribute names included, but the query always returns with zero results. Any suggestions anyone has would be greatly appreciated. Thanks.

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  • SSH not working after Restoring Running-Config to a Replacement Cisco Router

    - by Kyle Brandt
    One of my Cisco routers died over the weekend, Cisco sent the replacement and I restored the the config using copy tftp: running-config. Everything seems to work fine but I can no longer ssh into the router (I can telnet). The connection is refused, so it isn't listening on port 22 it seems like. I had previously backed up the config by just doing ssh router 'show run' > backup_config from my workstation. So: Is there anything wrong with my method of backup vs copy running-config tftp:? I know I haven't given any debug information, but is there something typical I need to do to get ssh working?

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  • Bind texture with pinned mapped memory in CUDA

    - by sjchoi
    I was trying to bind a host memory that was mapped for zero-copy to a texture, but it looks like it isn't possible. Here is a code sample: float* a; float* d_a; cudaSetDeviceFlags(cudaDeviceMapHost); cudaHostAlloc( (void **)&a, bytes, cudaHostAllocMapped); cudaHostGetDevicePointer((void **)&d_a, (void *)a, 0); texture<float, 2, cudaReadModeElementType> tex; cudaBindTexture2D( 0, &tex, d_a, &channelDesc, width, height, pitch); Is it recommended that you used pinned memory and just copy it over to device memory that is bind to texture?

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  • What are performance limits of a database?

    - by Tommy
    What are some rough performance limits (read/s, write/s) for a single database server (no master-slave architecture), assuming storage on disk? How many read/s, write/s, depending on the kind of disk? (SSD vs non-SSD) , assuming simple operations (select one row by primary key, update one row, correctly indexed). I assume this limit is dependent on disk seek/write. EDIT: My question is more about getting rough metrics of the number of operations a database supports: to be able to know for example, if a new feature triggering 300 inserts/s can be supported without scaling out with additional servers.

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  • SQL query for getting count on same table using left outer join

    - by Sasi
    Hi all, I have a table from which i need to get the count grouped on two columns. the table has two columns one datetime column and another one is success value(-1,1,0) What i am looking for is something like this... count of success value for each month month----success-----count 11------- -1 ------- 50 11------- 1 --------- 50 11------- 0 ------- 50 12------- -1 ------- 50 12------- 1 ------- 50 12------- 0 ------- 50 if there is no success value for a month then the count should be null or zero. I have tried with left outer join as well but of no use it gives the count incorrectly. Thanks in advance Sasi

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  • Array subscript is not an integer

    - by Dimitri
    Hello folks, following this previous question Malloc Memory Corruption in C, now i have another problem. I have the same code. Now I am trying to multiply the values contained in the arrays A * vc and store in res. Then A is set to zero and i do a second multiplication with res and vc and i store the values in A. (A and Q are square matrices and mc and vc are N lines two columns matrices or arrays). Here is my code : int jacobi_gpu(double A[], double Q[], double tol, long int dim){ int nrot, p, q, k, tid; double c, s; double *mc, *vc, *res; int i,kc; double vc1, vc2; mc = (double *)malloc(2 * dim * sizeof(double)); vc = (double *)malloc(2 * dim * sizeof(double)); vc = (double *)malloc(dim * dim * sizeof(double)); if( mc == NULL || vc == NULL){ fprintf(stderr, "pb allocation matricre\n"); exit(1); } nrot = 0; for(k = 0; k < dim - 1; k++){ eye(mc, dim); eye(vc, dim); for(tid = 0; tid < floor(dim /2); tid++){ p = (tid + k)%(dim - 1); if(tid != 0) q = (dim - tid + k - 1)%(dim - 1); else q = dim - 1; printf("p = %d | q = %d\n", p, q); if(fabs(A[p + q*dim]) > tol){ nrot++; symschur2(A, dim, p, q, &c, &s); mc[2*tid] = p; vc[2 * tid] = c; mc[2*tid + 1] = q; vc[2*tid + 1] = -s; mc[2*tid + 2*(dim - 2*tid) - 2] = p; vc[2*tid + 2*(dim - 2*tid) - 2 ] = s; mc[2*tid + 2*(dim - 2*tid) - 1] = q; vc[2 * tid + 2*(dim - 2*tid) - 1 ] = c; } } for( i = 0; i< dim; i++){ for(kc=0; kc < dim; kc++){ if( kc < floor(dim/2)) { vc1 = vc[2*kc + i*dim]; vc2 = vc[2*kc + 2*(dim - 2*kc) - 2]; }else { vc1 = vc[2*kc+1 + i*dim]; vc2 = vc[2*kc - 2*(dim - 2*kc) - 1]; } res[kc + i*dim] = A[mc[2*kc] + i*dim]*vc1 + A[mc[2*kc + 1] + i*dim]*vc2; } } zero(A, dim); for( i = 0; i< dim; i++){ for(kc=0; kc < dim; k++){ if( k < floor(dim/2)){ vc1 = vc[2*kc + i*dim]; vc2 = vc[2*kc + 2*(dim - 2*kc) - 2]; }else { vc1 = vc[2*kc+1 + i*dim]; vc2 = vc[2*kc - 2*(dim - 2*kc) - 1]; } A[kc + i*dim] = res[mc[2*kc] + i*dim]*vc1 + res[mc[2*kc + 1] + i*dim]*vc2; } } affiche(mc,dim,2,"Matrice creuse"); affiche(vc,dim,2,"Valeur creuse"); } free(mc); free(vc); free(res); return nrot; } When i try to compile, i have this error : jacobi_gpu.c: In function ‘jacobi_gpu’: jacobi_gpu.c:103: error: array subscript is not an integer jacobi_gpu.c:103: error: array subscript is not an integer jacobi_gpu.c:118: error: array subscript is not an integer jacobi_gpu.c:118: error: array subscript is not an integer make: *** [jacobi_gpu.o] Erreur 1 The corresponding lines are where I store the results in res and A : res[kc + i*dim] = A[mc[2*kc] + i*dim]*vc1 + A[mc[2*kc + 1] + i*dim]*vc2; and A[kc + i*dim] = res[mc[2*kc] + i*dim]*vc1 + res[mc[2*kc + 1] + i*dim]*vc2; Can someone explain me what is this error and how can i correct it? Thanks for your help. ;)

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  • C# SendMessage to C++ WinProc

    - by jws
    I need to send a string from C# to a C++ WindowProc. There are a number of related questions on SO related to this, but none of the answers have worked for me. Here's the situation: PInvoke: [DllImport("user32", CharSet = CharSet.Auto)] public extern static int SendMessage(IntPtr hWnd, uint wMsg, IntPtr wParam, string lParam); C#: string lparam = "abc"; NativeMethods.User32.SendMessage(handle, ConnectMsg, IntPtr.Zero, lparam); C++: API LRESULT CALLBACK HookProc (int code, WPARAM wParam, LPARAM lParam) { if (code >= 0) { CWPSTRUCT* cwp = (CWPSTRUCT*)lParam; ... (LPWSTR)cwp->lParam <-- BadPtr ... } return ::CallNextHookEx(0, code, wParam, lParam); } I've tried a number of different things, Marshalling the string as LPStr, LPWStr, also tried creating an IntPtr from unmanaged memory, and writing to it with Marshal.WriteByte. The pointer is the correct memory location on the C++ side, but the data isn't there. What am I missing?

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  • Security of BitLocker with no PIN from WinPE?

    - by Scott Bussinger
    Say you have a computer with the system drive encrypted by BitLocker and you're not using a PIN so the computer will boot up unattended. What happens if an attacker boots the system up into the Windows Preinstallation Environment? Will they have access to the encrypted drive? Does it change if you have a TPM vs. using only a USB startup key? What I'm trying to determine is whether the TPM / USB startup key is usable without booting from the original operating system. In other words, if you're using a USB startup key and the machine is rebooted normally then the data would still be protected unless an attacker was able to log in. But what if the hacker just boots the server into a Windows Preinstallation Environment with the USB startup key plugged in? Would they then have access to the data? Or would that require the recovery key? Ideally the recovery key would be required when booted like this, but I haven't seen this documented anywhere.

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