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  • functions in assembler

    - by stupid_idiot
    hi, i have philosophised about the purpose of stack a little bit and after some coding i figured out what is it's strength. The only thing that lies in my stomache is how does it work with functions? I tried to make some easy function for adding two numbers using universal registers but I suppose that's not how does it work in C for example.. where are all the parameters, local variables and where is the result stored? how would you rewrite this to assembler?(how would compiler for C rewrite it?) int function(int a, int &b, int *c){ return a*(b++)+(*c); } i know this example kinda sucks.. but this way i can understand all the possibilities

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  • Postgresql error: could not open segment 1 of relation base/20983/2416

    - by kokonut
    I'm running a Postgresql query and getting the following error: ActiveRecord::StatementInvalid (PGError: ERROR: could not open segment 1 of relation base/20983/24161 (target block 5046584): No such file or directory The query is of the format 'SELECT "locations".* FROM "locations" WHERE ("locations"."id" IN (115990, 78330, 77891, 78248, ...)' with about 600 ids in the IN clause - not an optimal query I know but it's what I have to work with for the moment! The server is running PostgreSQL 8.4.6 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.4.real (Ubuntu 4.4.1-4ubuntu9) 4.4.1, 64-bit. Postgis 1.5 is also installed, and the locations table contains a geometry column. Anyone have any idea what could be causing the error? Thanks!

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  • PHP: find 2 or more numbers from a list of N numbers that can add up towards a given ammount

    - by Splash
    Hi Guys, I am trying to create a little php script that can make my life a bit easier. Basically, I am going to have 21 text fields on a page where I am going to input 20 different numbers. In the last field I will enter a number let's call it the TOTAL AMMOUNT. All I want the script to do is to point out which numbers from the 20 fields added up will come up to TOTAL AMMOUNT. Example: field1= 25.23 field2= 34.45 field3= 56.67 field4= 63.54 field5= 87.54 .... field20= 4.2 Total Ammount= 81.90 Output: field1+fields3=81.90 Some of the fields might have 0 as value because sometimes I only need to enter 5-15 fields and the maximum will be 20. If someone can help me out with the php code for this, will be greatly appreciated.

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  • WPF Scroll Button (Hold down functionality)

    - by Kyle
    Hey all, I have a listbox of items that I am using, and I have a button I made which scrolls up and down, but the only problem is, that you have to click every single time you want to scroll up and down a bit. I am looking for the functionality to simply hold down on the button and have it scroll.. is this possible in WPF? Perhaps I am overlooking something? I searched the internet and haven't found anything like it. Perhaps someone has done this before? Any input would be appreciated, thanks!

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  • Mono/C#: A good GUI toolkit ? looks good on KDE?

    - by Martin
    Hi there, i am trying to get into developing for linux and i am a .net developer so i decided to give Mono a try. THe problem is that i am having problems trying to find a good gui toolkit. I have chosen KDE over GNOME because its a little bit more pleasing on the eye. I have looked here http://www.mono-project.com/Gui_Toolkits I get the sense GTK# is a good toolkit but its for GNOME. I know you can still run GNOME apps on KDE - but do they look nice ? probably not?? I would really appreciated any feedbakc from anyone who is doing the same or has done the same. I don't want to end up choosing the wrong toolkit and then have to change half way trhough. Also i was hoping to do all my development on my Windows PC and then just pass it to linux when i am ready... I presume this is possible? Thanks in advance

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  • Accordion table cell - How to dynamically expand/contract uitableviewcell?

    - by s.newave
    Hi, I am trying create an accordion type of uitableviewcell that, when the user selects the cell, it expands to display a detailed info view inline similar to how the digg app works. I initially tried replacing the current tablecell with a customcell in cellForRowAtIndex however the animation looks a bit choppy as you can see the cell being replaced and overall the effect doesnt work to well. If you look at the digg app and others who have done this it seems that they arent replacing the current cell but instead perhaps adding a subview to the cell? The original cell however doesnt seem to animate at all and only the new view accordions into the table. Does anyone have any ideas how to accomplish a similar effect?

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  • Design and Implementation with Prototyping Methodology

    - by Shahin
    I'm developing a game for my dissertation, and I'm using the spiral method approach. I'm having a bit of difficulty structuring my dissertation, specifically the design and implementation section. My solution was designed as much as possible initially, and then after each prototype implementation, the design was refined and extended and prototyped again (this was repeated a few times). My problem is how to structure this in my dissertation, my current idea is: Design Chapter Prototype 1 (Initial) Design Prototype 2 Design Prototype 3 Design Implementation Chapter Prototype 1 (Initial) Implementation Prototype 2 Implementation Prototype 3 Implementation Any suggestions?

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  • Java, searching within a list of objects?

    - by Rick
    I'm a bit lost on the way to make this happen the fastest. I have a large list of objects that have basic variable attributes (with getters / setters) and I need to do a search in this list to find the objects within the list that match a given parameter I have found how to do a regular list search but I need to, for example search for the value of the result of doing a call getName() for each object in the list and get objects that have a result that matches my input. Something like below where the third argument is the result of the method call and the second is what I am trying to find. int index = Collections.binarySearch(myList, "value", getName()); Any advice is appreciated

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  • Jetspeed null PortletDefinition

    - by heeboir
    Hello, I am running a jetspeed portal which contains various portlet applications and have come across an issue after a recent reinstall where some of the portlets will return Cannot pass a null PortletDefinition to a PortletEntity Any idea what is causing this issue? I investigated a bit and it seems that jetspeed runs a process when new portlets are added where it creates mappings in its DB (derby in my case). If this does not complete it seems to cause this problem. Is my assumption correct? If yes, how can I restart this process? Many thanks

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  • using html text in as3

    - by vincent
    Hello, i'm having a bit of a question, I have some newspost from my database. But there are tags in it and some tags aswell. My questiion is how i should go about it to get the newspost showing as it should be. The images should get shown instead of the tags etc. I know i'll have to work with a loader to use the images but how would as3 recognize them? Is there anyway i could use htmltext or something so as3 knows automaticly where the imagetags are? Also, if i add the image would it be possible to wrap the text around it? So i dont have an empty space next to the image?

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  • C# dll import function correctly

    - by poco
    I am trying to import a function from a c dll into C#. The c function looks like this unsigned short write_buffer( unsigned short device_number, unsigned short word_count, unsigned long buffer_link, unsigned short* buffer) my attempt at a C# import looks like this [DllImport("sslib32.dll", CharSet = CharSet.Ansi, SetLastError = true)] private static extern ushort write_buffer(ushort deviceNumber, ushort wordCount, UInt32 bufferLink, IntPtr buffer) In C# i have a Dictionary of messages that i would like to pass to this function. The Dictionary looks like this: Dictionary<string, List<ushort>> msgs I am a bit confused how to make a make a proper call to pass msgs as the buffer. deviceNumber is 2, wordCount is 32, and buffLink is 0. So i know the call should look something like this write_buffer(2,32,0, msgs[key]); Obviously i am getting an invalid argument for the IntPtr. What is the proper way to make this call?

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  • where is "create instance" menu in visual studio 2010?

    - by austin powers
    Hi, in visual studio 2008 there is a sub-menu called "create instance" which is resides in class designer. Today I've opened VS.net 2010 and then opened class designer and create my class over there and when I wanted to test my class with the help of "create instance" option there was no such option available in vs.net 2010. and I've googled about it a little bit but no answer at all so I decided to mention about it here. where can I find this menu in vs.net 2010? regards.

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  • Oracle SQL outer join query puzzle

    - by user1651446
    So I am dumb and I have this: select whatever from bank_accs b1, bank_accs b2, table3 t3 where t3.bank_acc_id = t1.bank_acc_id and b2.bank_acc_number = b1.bank_acc_number and b2.currency_code(+) = t3.buy_currency and trunc(sysdate) between nvl(b2.start_date, trunc(sysdate)) and nvl(b2.end_date, trunc(sysdate)); My problem is with the date (actuality) check on b2. Now, I need to return a row for each t3xb1 (t3 = ~10 tables joined, of course), even if there are ONLY INVALID records (date-wise) in b2. How do I outer-join this bit properly? Can't use ANSI joins, must do in a single flat query. Thanks.

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  • C++ SDL State Machine Segfault

    - by user1602079
    The code compiles and builds fine, but it immediately segfaults. I've looked at this for a while and have no idea why. Any help is appreciated. Thank you! Here's the code: main.cpp #include "SDL/SDL.h" #include "Globals.h" #include "Core.h" #include "GameStates.h" #include "Introduction.h" int main(int argc, char** args) { if(core.Initilize() == false) { SDL_Quit(); } while(core.desiredstate != core.Quit) { currentstate->EventHandling(); currentstate->Logic(); core.ChangeState(); currentstate->Render(); currentstate->Update(); } SDL_Quit(); } Core.h #ifndef CORE_H #define CORE_H #include "SDL/SDL.h" #include <string> class Core { public: SDL_Surface* Load(std::string filename); void ApplySurface(int X, int Y, SDL_Surface* source, SDL_Surface* destination); void SetState(int newstate); void ChangeState(); enum state { Intro, STATES_NULL, Quit }; int desiredstate, stateID; bool Initilize(); }; #endif Core.cpp #include "Core.h" #include "SDL/SDL.h" #include "Globals.h" #include "Introduction.h" #include <string> /* Initilizes SDL subsystems */ bool Core::Initilize() { //Inits subsystems, reutrns false upon error if(SDL_Init(SDL_INIT_EVERYTHING) == -1) { return false; } SDL_WM_SetCaption("Game", NULL); return true; } /* Loads surfaces and optimizes them */ SDL_Surface* Core::Load(std::string filename) { //The surface to be optimized SDL_Surface* original = SDL_LoadBMP(filename.c_str()); //The optimized surface SDL_Surface* optimized = NULL; //Optimizes the image if it loaded properly if(original != NULL) { optimized = SDL_DisplayFormat(original); SDL_FreeSurface(original); } else { //returns NULL upon error return NULL; } return optimized; } /* Blits surfaces */ void Core::ApplySurface(int X, int Y, SDL_Surface* source, SDL_Surface* destination) { //Stores the coordinates of the surface SDL_Rect offsets; offsets.x = X; offsets.y = Y; //Bits the surface if both surfaces are present if(source != NULL && destination != NULL) { SDL_BlitSurface(source, NULL, destination, &offsets); } } /* Sets desiredstate to newstate */ void Core::SetState(int newstate) { if(desiredstate != Quit) { desiredstate = newstate; } } /* Changes the game state */ void Core::ChangeState() { if(desiredstate != STATES_NULL && desiredstate != Quit) { delete currentstate; switch(desiredstate) { case Intro: currentstate = new Introduction(); break; } stateID = desiredstate; desiredstate = core.STATES_NULL; } } Globals.h #ifndef GLOBALS_H #define GLOBALS_H #include "SDL/SDL.h" #include "Core.h" #include "GameStates.h" extern SDL_Surface* screen; extern Core core; extern GameStates* currentstate; #endif Globals.cpp #include "Globals.h" #include "SDL/SDL.h" #include "GameStates.h" SDL_Surface* screen = SDL_SetVideoMode(640, 480, 32, SDL_SWSURFACE); Core core; GameStates* currentstate = NULL; GameStates.h #ifndef GAMESTATES_H #define GAMESTATES_H class GameStates { public: virtual void EventHandling() = 0; virtual void Logic() = 0; virtual void Render() = 0; virtual void Update() = 0; }; #endif Introduction.h #ifndef INTRODUCTION_H #define INTRODUCTION_H #include "GameStates.h" #include "Globals.h" class Introduction : public GameStates { public: Introduction(); private: void EventHandling(); void Logic(); void Render(); void Update(); ~Introduction(); SDL_Surface* test; }; #endif Introduction.cpp #include "SDL/SDL.h" #include "Core.h" #include "Globals.h" #include "Introduction.h" /* Loads all the assets */ Introduction::Introduction() { test = core.Load("test.bmp"); } void Introduction::EventHandling() { SDL_Event event; while(SDL_PollEvent(&event)) { switch(event.type) { case SDL_QUIT: core.SetState(core.Quit); break; } } } void Introduction::Logic() { //to be coded } void Introduction::Render() { core.ApplySurface(30, 30, test, screen); } void Introduction::Update() { SDL_Flip(screen); } Introduction::~Introduction() { SDL_FreeSurface(test); } Sorry if the formatting is a bit off... Having to put four spaces for it to be put into a code block offset it a bit. I ran it through gdb and this is what I got: Program received signal SIGSEGV, Segmentation fault. 0x0000000000400e46 in main () Which isn't incredibly useful... Any help is appreciated. Thank you!

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  • Remove Attributes onmouseover and onmouseout

    - by Abs
    Hello all, I am trying to make use of JQuery's remove attribute like this: $('#rom-img_1').removeAttr('mouseover'); $('#rom-img_2').removeAttr('mouseout'); However, it does not remove the effects of the events as the events are still triggered on mouseover and on mouseout. I have tried adding "on" before the events names too but JQuery doesn't use it like that. Why isn't this working and how can I remove those attributes. This is a bit of the HTML: <div onmouseout="$('#heart_401').css({'display':'none'});" onmouseover="$('#heart_401').css({'display':'block'});" id="row-img_11"></div> Thanks all for any help

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  • Where can I find an array of the unassigned Unicode code points for a particular block?

    - by gitparade
    At the moment, I'm writing these arrays by hand. For example, the Miscellaneous Mathematical Symbols-A block has an entry in hash like this: my %symbols = ( ... miscellaneous_mathematical_symbols_a => [(0x27C0..0x27CA), 0x27CC, (0x27D0..0x27EF)], ... ) The simpler, 'continuous' array miscellaneous_mathematical_symbols_a => [0x27C0..0x27EF] doesn't work because Unicode blocks have holes in them. For example, there's nothing at 0x27CB. Take a look at the code chart [PDF]. Writing these arrays by hand is tedious, error-prone and a bit fun. And I get the feeling that someone has already tackled this in Perl!

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  • Are MongoDB and CouchDB perfect substitutes?

    - by raoulsson
    I haven't got my hands dirty yet with neither CouchDB nor MongoDB but I would like to do so soon... I also have read a bit about both systems and it looks to me like they cover the same cases... Or am I missing a key distinguishing feature? I would like to use a document based storage instead of a traditional RDBMS in my next project. I also need the datastore to handle large binary objects (images and videos) automatically replicate itself to physically separate nodes rendering the need of an additional RDBMS superfluous Are both equally well suited for these requirements? Thanks!

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  • Badword filter in PHP?

    - by morpheous
    I am writing a badword filter in PHP. I have a list of badwords in an array and the method cleanse_text() is written like this: public static function cleanse_text($originalstring){ if (!self::$is_sorted) self::doSort(); return str_ireplace(self::$badwords, '****', $originalstring); } This works trivially, for exact matches, but I wanted to also censor words that have been disguised like 'ab*d' where 'abcd' is a bad word. This is proving to be a bit more difficult. Here are my questions: Is a badword filter worth bothering with (it is a site for professionals so a certain minimum decorum is required - I would have thought) Is it worth the hustle of trying to capture obvious work arounds like 'f*ck' - or should I not attempt to filter those out. Is there a better way of writing the cleanse_text() method above?

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  • Debugging Drupal 6

    - by coach_rob
    OK, I've read and attempted all of the tutorials I can find on being able to debug a locally installed Drupal 6 instance. I'm on Windows, 32-bit. I have access to Eclipse (obviously) as well as Visual Studio 2005/2008. I've yet to be able to get any of the Eclipse options (XDebug, Zend, etc.) working to be able to step through code, inspect variables, etc. I've heard good things about VS.PHP, but haven't committed to the $100 or whatever it is. Can some of your PHP/Drupal gurus out there tell me the best, simplest, most reliable way to debug Drupal and PHP on the Windows platform?

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  • What am I missing in my compilation / linking stage of this C++ FreeType GLFW application?

    - by anon
    g++ -framework OpenGL GLFT_Font.cpp test.cpp -o test -Wall -pedantic -lglfw -lfreetype - pthread `freetype-config --cflags` Undefined symbols: "_GetEventKind", referenced from: __glfwKeyEventHandler in libglfw.a(macosx_window.o) __glfwMouseEventHandler in libglfw.a(macosx_window.o) __glfwWindowEventHandler in libglfw.a(macosx_window.o) "_ShowWindow", referenced from: __glfwPlatformOpenWindow in libglfw.a(macosx_window.o) "_MenuSelect", referenced from: This is on Mac OS X. I am trying to get GLFT_FONT to work on MacOSX with GLFW and FreeType2. This is not the standard Makefile. I changed parts of it myself (like the "-framework OpenGL" I am from Linux land, a bit new to Mac. I am on Mac OS X 10.5.8; using XCode 3.1.3 Thanks!

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  • How to use all the cores in Windows 7?

    - by Anon
    I am not sure if this belongs to Stackoverflow or Superuser but I thought I would ask here. I have a console based application written in C which currently takes about an hour to terminate in Windows 7 64-bit OS. The task manager reports that the application is using only 25% of the available CPU. I would like to reduce the run time by increasing cpu usage. Is there any way to let the application use all four cores (the laptop has Core i5) instead of just one? I am assuming that task manager reports 25% because only one core is allocated to the program.

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  • Why does this page look different between IE, Firefox & Chrome

    - by ripper234
    In Firefox it looks just like I want it to look, in IE it looks "a bit weird", and in Chrome it's all twisted. What non-standard HTML I am using that makes it looks so different between browsers? Specifically, how can I fix the Chrome & IE versions to look more like Firefox? Note that Chrome only goes haywire if all or almost all columns have the yellow stickies. If one or two columns are empty, then Chrome displays the page just like Firefox. The full HTML is at this pastebin.

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  • Which is faster in memory, ints or chars? And file-mapping or chunk reading?

    - by Nick
    Okay, so I've written a (rather unoptimized) program before to encode images to JPEGs, however, now I am working with MPEG-2 transport streams and the H.264 encoded video within them. Before I dive into programming all of this, I am curious what the fastest way to deal with the actual file is. Currently I am file-mapping the .mts file into memory to work on it, although I am not sure if it would be faster to (for example) read 100 MB of the file into memory in chunks and deal with it that way. These files require a lot of bit-shifting and such to read flags, so I am wondering that when I reference some of the memory if it is faster to read 4 bytes at once as an integer or 1 byte as a character. I thought I read somewhere that x86 processors are optimized to a 4-byte granularity, but I'm not sure if this is true... Thanks!

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  • (Python) algorithm to randomly select a key based on proportionality/weight

    - by LaundroMat
    Hi - I'm a bit at a loss as to how to find a clean algorithm for doing the following: Suppose I have a dict k: >>> k = {'A': 68, 'B': 62, 'C': 47, 'D': 16, 'E': 81} I now want to randomly select one of these keys, based on the 'weight' they have in the total (i.e. sum) amount of keys. >>> sum(k.values()) >>> 274 So that there's a >>> 68.0/274.0 >>> 0.24817518248175183 24.81% percent change that A is selected. How would you write an algorithm that takes care of this? In other words, that makes sure that on 10.000 random picks, A will be selected 2.481 times?

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  • Question about inserting assembly code in C++

    - by Bruce
    I am working on VC++ compiler. I want to accomplish the following The variables s.AddrFrame.Offset and s.AddrStack.Offset contain the value of EBP and ESP respectively. I want to extract the value of old EBP and the return address. Assuming the address EBP + 1 contains the old 32 bit EBP value and EBP + 5 the return address I wrote the following code: unsigned int old_ebp = 0; unsigned int ret_addr = 0; __asm{ mov old_ebp, DWORD PTR [s.AddrFrame.Offset + 1] mov ret_addr, DWORD PTR [s.AddrStack.Offset + 5] } But this is not compiling xxxx.cpp(1130) : error C2415: improper operand type Please Help

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