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  • Pinvoke- to call a function with pointer to pointer to pointer parameter

    - by jambodev
    complete newbe in PInvoke. I have a function in C with this signature: int addPos(int init_array_size, int *cnt, int *array_size, PosT ***posArray, PosT ***hPtr, char *id, char *record_id, int num, char *code, char *type, char *name, char *method, char *cont1, char *cont2, char *cont_type, char *date1, char *date_day, char *date2, char *dsp, char *curr, char *contra_acc, char *np, char *ten, char *dsp2, char *covered, char *cont_subtype, char *Xcode, double strike, int version, double t_price, double long, double short, double scale, double exrcised_price, char *infoMsg); and here is how PosT looks like: typedef union pu { struct dpos d; struct epo e; struct bpos b; struct spos c; } PosT ; my questions are: 1- do I need to define a class in CSharp representing PosT? 2- how do I pass PosT ***posArray parameter across frm CSharp to C? 3- How do I specify marshaling for it all? I Do appreciate your help

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  • Sudoku solver evaluation function

    - by Rich
    Hi, So I'm trying to write a simple genetic algorithm for solving a sudoku (not the most efficient way, I know, but it's just to practice evolutionary algorithms). I'm having some problems coming up with an efficient evaluation function to test if the puzzle is solved or not and how many errors there are. My first instinct would be to check if each row and column of the matrix (doing it in octave, which is similar to matlab) have unique elements by ordering them, checking for duplicates and then putting them back the way they were, which seems long winded. Any thoughts? Sorry if this has been asked before...

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  • encryption decryption function in php

    - by parthav
    import gnupg, urllib retk = urllib.urlopen("http://keyserver.pramberger.at/pks/" "lookup?op=get&search=userid for the key is required") pub_key = retk.read() #print pub_key gpg = gnupg.GPG(gnupghome="/tmp/foldername", verbose=True) print "Import the Key :", gpg.import_keys(pub_key).summary() print "Encrypt the Message:" msg = "Hellllllllllo" uid = "userid that has the key on public key server" enc = gpg.encrypt(msg, uid,always_trust=True) print "*The enc content***************************== ", enc this function written in python gives me encrypted message.The encryption is done using the public key which i am getting from public key server(pramberger.at). Now how can i implement the same functionality (getting the key from any public key server and using that key encrypt the message) in php

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  • Embedding Ruby, calling a function from C

    - by ThePower
    Hi, I'm writing an app that calls ruby code from c. I am having a little difficulty and wondered if anyone could point me in the rite direction. I currently have in my C. #include ruby.h main() { ruby_init(); rb_require("myRubyFile"); rb_funcall(rb_module_new(), rb_intern("RubyFunction"), 0, NULL); } My ruby file is in the same directory as my c file and is called myRubyFile.rb and contains a definition of the function RubyFunction(). This is a cut down of what I actually want to do, just making it more readable for others. I just require some feedback as to whether this is the correct method to call ruby code from my c file. Regards

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  • error CS0133: Assigning the result of a function to a const in C#.net

    - by Greg
    Trying to tidy up scope and avoid possible multiple calls to RegisterWindowMessage. Currently have a class used once with the following member [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] static extern int RegisterWindowMessage(string lpString); private int m_message = RegisterWindowMessage("MY_MSG"); As we only have one instance this seems ok, but think it would be more tidy to use. With my basic C# understanding this should call RegisterWindowMessage and assign the result to int and not allow it to change. private const int message = RegisterWindowMessage("MY_MSG"); however attempting to do so leads to a error CS0133: The expression being assigned to 'someclass.messageEvent' must be constant so now I'm confused, does this mean the function was being assigned and called each time m_message was used previously, is there something else missing?

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  • Rails scalar query

    - by Craig
    I need to display a UI element (e.g. a star or checkmark) for employees that are 'favorites' of the current user (another employee). The Employee model has the following relationship defined to support this: has_and_belongs_to_many :favorites, :class_name => "Employee", :join_table => "favorites", :association_foreign_key => "favorite_id", :foreign_key => "employee_id" The favorites has two fields: employee_id, favorite_id. If I were to write SQL, the following query would give me the results that I want: SELECT id, account, IF( ( SELECT favorite_id FROM favorites WHERE favorite_id=p.id AND employee_id = ? ) IS NULL, FALSE, TRUE) isFavorite FROM employees Where the '?' would be replaced by the session[:user_id]. How do I represent the isFavorite scalar query in Rails? Another approach would use a query like this: SELECT id, account, IF(favorite_id IS NULL, FALSE, TRUE) isFavorite FROM employees e LEFT OUTER JOIN favorites f ON e.id=f.favorite_id AND employee_id = ? Again, the '?' is replaced by the session[:user_id] value. I've had some success writing this in Rails: ee=Employee.find(:all, :joins=>"LEFT OUTER JOIN favorites ON employees.id=favorites.favorite_id AND favorites.employee_id=1", :select=>"employees.*,favorites.favorite_id") Unfortunately, when I try to make this query 'dynamic' by replacing the '1' with a '?', I get errors. ee=Employee.find(:all, :joins=>["LEFT OUTER JOIN favorites ON employees.id=favorites.favorite_id AND favorites.employee_id=?",1], :select=>"employees.*,favorites.favorite_id") Obviously, I have the syntax wrong, but can :joins expressions be 'dynamic'? Is this a case for a Lambda expression? I do hope to add other filters to this query and use it with will_paginate and acts_as_taggable_on, if that makes a difference. edit errors from trying to make :joins dynamic: ActiveRecord::ConfigurationError: Association named 'LEFT OUTER JOIN favorites ON employees.id=favorites.favorite_id AND favorites.employee_id=?' was not found; perhaps you misspelled it? from /Users/craibuc/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/associations.rb:1906:in `build' from /Users/craibuc/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/associations.rb:1911:in `build' from /Users/craibuc/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/associations.rb:1910:in `each' from /Users/craibuc/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/associations.rb:1910:in `build' from /Users/craibuc/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/associations.rb:1830:in `initialize' from /Users/craibuc/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:1789:in `new' from /Users/craibuc/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:1789:in `add_joins!' from /Users/craibuc/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:1686:in `construct_finder_sql' from /Users/craibuc/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:1548:in `find_every' from /Users/craibuc/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:615:in `find'

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  • Extending Ruby, calling a function from C

    - by ThePower
    Hi, I'm writing an app that calls ruby code from c. I am having a little difficulty and wondered if anyone could point me in the rite direction. I currently have in my C. #include ruby.h main() { ruby_init(); rb_require("myRubyFile"); rb_funcall(rb_module_new(), rb_intern("RubyFunction"), 0, NULL); } My ruby file is in the same directory as my c file and is called myRubyFile.rb and contains a definition of the function RubyFunction(). This is a cut down of what I actually want to do, just making it more readable for others. I just require some feedback as to whether this is the correct method to call ruby code from my c file. Regards

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  • How do you find a functions virtual call address in assembly?

    - by Daniel
    I've googled around but i'm not sure i am asking the right question or not and i couldn't find much regardless, perhaps a link would be helpful. I made a c++ program that shows a message box, then I opened it up with Ollydbg and went to the part where it calls MessageBoxW. The call address of MessageBoxW changes each time i run the app as windows is updating my Imports table to have the correct address of MessageBoxW. So my question is how do i find the virtual addres of MessageBoxW to my imports table and also how can i use this in ollydbg? Basically I'm trying to make a code cave in assembly to call MessageBoxW again. I got fairly close once by searching the executable with a hex editor and found the position of the call, and I think I found the virtual address. But when i call that virtual address in olly and saved it to the executable, the next time i opened it the call was replaced with a bunch of DB xyz (which looked like the virtual address but why did the call get removed? Sorry if my terminology is off as i'm new to this so i'm not quite sure what to call things.

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  • WordPress Conditional: Only show if current page title is equal to post meta

    - by Wade D Ouellet
    Hey, I am calling a bunch of posts under a certain post type in WordPress which works but I am trying to add a conditional that will check first if those post's custom meta field (labeled "disc") is equal to the current post's title. Here is what I have but this conditional does not seem to work: <?php $pages = get_posts('numberposts=9999&post_type=song&post_status=publish&order=ASC&orderby=date'); $i = 1; foreach( $pages as $page ) { $content = $page->post_title; if( empty($content) ) continue; $content = apply_filters('the_content', $content); ?> <?php if(get_post_meta($page->ID, "p30-disc", true)=="the_title()") { ?> <tbody class="vevent"> <?php if ($i%2===0) { ?><tr class="gigpress-row gigpress-alt"> <?php } else { ?><tr class="gigpress-row"><?php } ?> <td><?php echo $page->post_title ?></td> <td><?php echo get_post_meta($page->ID, "p30-length", true); ?></td> <td><a href="http://itunes.com/<?php echo get_post_meta($page->ID, "p30-itunes-song", true); ?>">BUY</a></td> </tr> <tr class="gigpress-info"> <td colspan="3"><?php echo $page->post_content ?></td> </tr> </tbody> <?php $i++; } } ?> When I simply echo "get_post_meta($page-ID, "p30-disc", true)" or "the_title()" it spits out their proper values, which are equal, so obviously something is just wrong with that conditional. Thanks, Wade

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  • PHP's apache_setenv function causes 500 Internal Server Error

    - by guitar-
    apache_setenv ( 'no-gzip', 1 ) I'm trying to disable gzip for a certain page's output, but only that page. This works fine on testing servers, but not the production server, which is running the same thing (CentOS and Apache), works on Ubuntu though. Anyway, do you know why? Or is there some other alternative? I was thinking of using ob_start () to put all output in a buffer, and then unzip it myself with a PHP function then call ob_end_flush ()... or would it not be gzipped until right before Apache sends it to the client? Thanks for any help.

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  • Mysql Real Escape String PHP Function Adding "\" to My Field Entry

    - by Jascha
    Hello, I am submitting a form to my mySql database using PHP. I am sending the form data through the mysql_real_escape_string($content); function. When the entry shows up in my database (checking in myPhpAdmin) all of my double quotes and single quotes are escaped. I'm fairly certain this is a PHP configuration issue? so: $content = 'Hi, my name is Jascha and my "favorite" thing to do is sleep'; mysql_real_escape_string($content); $query = 'INSERT INTO DB...' comes up in my database as: Hi, my name is Jascha and my \"favorite" thing to do is sleep Who do I tell what to do? (I cannot access the php.ini). -J

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  • Calling function from popover.

    - by user288225
    Alright, so I made a popover from my main view and all that good stuff. But I want to have my popover call an action in my main view when a button within the popover is pressed. MainView *mainView = [[MainView alloc] initWithNibName:@"MainView" bundle:nil]; [mainView doStuff]; The "dostuff" function changes some elements within the view. For example, the color of the toolbar is supposed to be changed. I've put a print command and the print command executes. But for some reason, the toolbar won't change color. I've imported the header of MainView into the popover. I did an @class thingy for MainView in my popover. doStuff is declared in MainView's header. The IBOutlets are declared too, and connected. Any ideas?

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  • javascript return function's data as a file

    - by Dennis
    I have a function in javascript called "dumpData" which I call from a button on an html page as **onlick="dumpData(dbControl);"* What it does is return an xml file of the settings (to an alert box right now). I want to return it to the user as a file download. Is there a way to create a button when click will open a file download box and ask the user to save or open it? (sorta of like right-clicking and save target as)... Or can it be sent to a php file and use export();? Not sure how I would send a long string like that to php and have it simple send it back as a file download. Dennis

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  • no matching function for call to 'getline'

    - by WTP
    I have a class called parser: class parser { const std::istream& stream; public: parser(const std::istream& stream_) : stream(stream_) {} ~parser() {} void parse(); }; In parser::parse I want to loop over each line, so I use std::getline: std::getline(stream, line) The compiler gives me this error, however: src/parser.cc:10:7: error: no matching function for call to 'getline' std::getline(stream, line); ^~~~~~~~~~~~ But the first argument to std::getline is of type std::istream&, right? What could I be doing wrong?

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  • unresolved external symbol __penter referenced in function _WspiapiStrdup@4

    - by John Weldon
    I started getting this compile error after upgrading to Visual Studio 2010. Not sure if it's related, but I can't figure out what library to reference to satisfy this dependency? Is it just an API change bug or something? Microsoft (R) Program Maintenance Utility Version 10.00.30319.01 Copyright (C) Microsoft Corporation. All rights reserved. del wstest.res wstest.obj wstest.pdb wstest.ilk wstest.exe wstest.exe.manifest vc90.pdb cl -Gh -Ox -DNDEBUG -c -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -GS -D_X86_=1 -DWIN32 -D_WIN32 -W3 -D_WINNT -D_WIN32_WINNT =0x0501 -DNTDDI_VERSION=0x05010000 -D_WIN32_IE=0x0600 -DWINVER=0x0501 -D_MT -D_DLL -MDd wstest.c wstest.c link /DEBUG /DEBUGTYPE:cv -out:wstest.exe wstest.obj Ws2_32.lib Shlwapi.lib Microsoft (R) Incremental Linker Version 10.00.30319.01 Copyright (C) Microsoft Corporation. All rights reserved. wstest.obj : error LNK2019: unresolved external symbol __penter referenced in function _WspiapiStrdup@4 wstest.exe : fatal error LNK1120: 1 unresolved externals NMAKE : fatal error U1077: '"c:\program files (x86)\microsoft visual studio 10.0\vc\bin\link.EXE"' : return code '0x460' Stop.

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  • jQuery UI - Draggable is not a function?

    - by Dan
    Hi, I've trying to use the draggable effect on some divs on a page, but whenever I load the page, I get the error message: Error: $(".draggable").draggable is not a function I've had a look around it seemed other people were having this problem as they had not included the jQuery UI javascript file, but I definitely have. The following is within the head tag of my page: <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js" type="text/javascript"></script> <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/jquery-ui.min.js"></script> Can anyone suggest a solution? Any advice appreciated. Thanks.

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  • Read/Write operation on Fat table with out using System.IO in C#

    - by AZHAR
    Hi i am new to the system programming...i want to read information from fat table like total sector,total physical drive,containing logical drive types and as well containing files in the drives(like their file size,when accessed)with all information of files..and then display of these files with respect of their hierarchy at GUI. this is easy if we use System.IO namespace.but it is restricted for me.so please help

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  • struct function

    - by gcc
    typedef struct phoneEntry { struct phoneEntry* next; char* info; char* number; } phoneEntry; typedef struct contactEntry { struct contactEntry* next; char* name; char* surname; struct phoneEntry* phoneList; } contactEntry; I want write a function that add a new contact to the phone book using given name and surname.(please, Note that a new contact should be located in the proper location which ensures the alphabetical ordering of the contacts.) void addContact(contactEntry** phoneBook, char* name, char* surname) { } I tried to write ,but ,unfortunetely, I cannot question is that there are any person who can help me.

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  • Object not disposed after calling the Dispose() function.

    - by Pavan Navali
    Hi, I have query regarding the disposing of an object. The scenario is as follows. In a Desktop Appication, developed in C#, I have a function in which a object in created like this. namespace Class 1 { variables section; .... .... Function1() { local variables; try { Object1 obj = new Object1(); .... .... if(true) { .... } else { **obj.Dispose();** } } catch() {} finally {} } } The object is not disposed when the else part is executed. The msdn link for this is http://msdn.microsoft.com/en-us/library/system.componentmodel.component.dispose(VS.90).aspx according to which the component should realase all the resources used by it. I would like to know, why the object is not disposed. Thank you. Pavan Navali.

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  • Comparing 2 columns in the same table with the "Like" function

    - by Vic
    I'm trying to come up with a way to query the values in two different columns in the same table where the result set will indicate instances where the value of columnB doesn't contain the value of columnA. For example, my "Nodes" table contains columns "NodeName" and "DNS". The values should look similar to the following: NodeName DNS Router1 Router1.mydomain.com I want to run a query to show which rows have a DNS value that does not contain (or begin with) the value of the NodeName field. I think the query should function something similar to the following, but obviously I'm missing something with regard to the use of "Like" in this situation. SELECT NodeName, DNS WHERE DNS NOT LIKE 'NodeName%' I'm using SQL Server 2005, and any suggestions would be greatly appreciated... :)

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  • Audio -- How much performance improvement can I expect from from reducing function calls by using bu

    - by morgancodes
    I'm working on an audio-intensive app for the iPhone. I'm currently calling a number of different functions for each sample I need to calculate. For example, I have an envelope class. When I calculate a sample, I do something like: sampleValue = oscilator->tic() * envelope->tic(); But I could also do something like: for(int i = 0; i < bufferLength; i++){ buffer[i] = oscilatorBuffer[i] * evelopeBuffer[i]; } I know the second will be more efficient, but don't know by how much. Are function calls expensive enough that I'd be crazy not to use buffers if I care event a tiny bit about performance?

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  • Initialize Pointer Through Function

    - by SoulBeaver
    I was browsing my teacher's code when I stumbled across this: Order* order1 = NULL; then order1 = order(customer1, product2); which calls Order* order(Customer* customer, Product* product) { return new Order(customer, product); } This looks like silly code. I'm not sure why, but the teacher initialized all pointers to NULL instead of declaring them right away(looking at the code it's entirely possible, but he chose not to). My question is: is this good or acceptable code? Does the function call have any benefits over calling a constructor explicitely? And how does new work in this case? Can I imagine the code now as kind of like: order1 = new Order(customer, product);

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  • writing 'remove' function in prolog

    - by Adrian
    I am desperately trying to create a remove function, that will simply remove all items that equal to X from a list. After many changes, this is my code so far: remove([], X, L1). /* when the source list is empty, stop*/ remove([X|T], X, L1) :- remove(T, X, L1). /* when first element in the list equals X, don't append it to L1 */ remove([H|T], X, L1) :- remove(T, X, [H|L1]). /*when first element in the list doesn't equal X, append it to L1 */ when running on remove([1,2,3,4,5], 3, R). it returns two trues and nothing else. Anyone has any idea what I'm doing wrong?

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  • Filtering A MySQL Result Set Based On The Return Value Of A Function

    - by Joshua
    I'm a SQL noob, and I need a little bit of help understanding the big picture of if it is possible, and if so how to go about filtering a result set based on the return value of a function which is passed one of the fields of the record. Let's say I have a table called "Numbers" with just one field: "Value". How could I correctly specify the following "pseudo-sql"?: SELECT Value FROM numbers WHERE IsPrime(Value)=true Can I accomplish such a thing, and if so, where/how do I put/store "IsPrime"? I'm using MySQL.

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