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• ETW tracking from .net, user mode and driver

  - by Jack Juiceson

  Hi everyone, We have an application that parts of it are in .net, c++ usermode and C++ drivers. The application is divided into several executables that run on demand and communication with each other using LPC(the processes run in different sessions(winlogon)). Currently We have a home written logging service to which .net and c++ usermode communicate by sending LPC messages. The driver uses DbgPrint and is not always enabled, as it causes the code to run 30% slower(we have lots of logging). I want to have all the logs written in one place and preferably not writing the logger myself(I love log4cpp and log4net). The requirement is to write from all the executables and drivers into one place and to have minimal overhead. I have read that ETW is way to go, however I wasn't able to find already written logger that uses it like log4cpp or log4net. So basically my questions is, do you know if there is already implemented ETW appender for log4cpp and log4net I can use ?

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• Some general C questions.

  - by b-gen-jack-o-neill

  Hello. I am trying to fully understand the process pro writing code in some language to execution by OS. In my case, the language would be C and the OS would be Windows. So far, I read many different articles, but I am not sure, whether I understand the process right, and I would like to ask you if you know some good articles on some subjects I couldn´t find. So, what I think I know about C (and basically other languages): C compiler itself handles only data types, basic math operations, pointers operations, and work with functions. By work with functions I mean how to pass argument to it, and how to get output from function. During compilation, function call is replaced by passing arguments to stack, and than if function is not inline, its call is replaced by some symbol for linker. Linker than find the function definition, and replace the symbol to jump adress to that function (and of course than jump back to program). If the above is generally true and I get it right, where to final .exe file actually linker saves the functions? After the main() function? And what creates the .exe header? Compiler or Linker? Now, additional capabilities of C, today known as C standart library is set of functions and the declarations of them, that other programmers wrote to extend and simplify use of C language. But these functions like printf() were (or could be?) written in different language, or assembler. And there comes my next question, can be, for example printf() function be written in pure C without use of assembler? I know this is quite big question, but I just mostly want to know, wheather I am right or not. And trust me, I read a lots of articles on the web, and I would not ask you, If I could find these infromation together on one place, in one article. Insted I must piece by piece gather informations, so I am not sure if I am right. Thanks.

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• What is missing from the Java API?

  - by Jack

  I started using Java years ago and I've always found almost everything I need inside the standard API provided with JDK SE, with the exception of specific things that don't fit well inside a generic API, like GUI elements (graphs or so on) or advanced mathematical API.. So I was wondering: Which are the most important things that the Java API is missing? When I say "important", I mean either things that you have often needed, but have had to rely on custom libraries, or things that are usually are included in APIs, but not in Java's.

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• Probably an easy one - PHP/CodeIgniter 'Undefined Variable'

  - by Jack W-H

  Morning y'all This is probably an easy one but I barely got any sleep last night and am struggling to comprehend anything. I've got a CodeIgniter library I've made called Points.php. Here's the contents of Points: <?php if (!defined('BASEPATH')) exit('No direct script access allowed'); class Points { function __construct() { $this->ci =& get_instance(); $this->ci->load->database(); } function getpoints($params) { echo $userid; } } /* End of file Points.php */ /* Location: ./application/libraries/Points.php */ ?> As you can see, I'm building it up slowly and it's being kept simple. In one of my views, I want it to display the number of 'points' (which for the time being is simply the third segment of the URI). I call it like this: <p>Points: <?php $params['user_id']=$this->uri->segment(3,1); echo $this->points->getpoints($params); ?></p> The warning I get back in the view is this: A PHP Error was encountered Severity: Notice Message: Undefined variable: userid Filename: libraries/Points.php Yes I know it's such a simple problem but I've tried lots of things. Some variations include echoing in Points.php $params['userid']; etc. But I don't see what I'm doing wrong? This is my first CodeIgniter class and I've fallen at the first step, haha...

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• Using Directives, Namespace and Assembly Reference - all jumbled up with StyleCop!

  - by Jack

  I like to adhere to StyleCop's formatting rules to make code nice and clear, but I've recently had a problem with one of its warnings: All using directives must be placed inside of the namespace. My problem is that I have using directives, an assembly reference (for mocking file deletion), and a namespace to juggle in one of my test classes: using System; using System.IO; using Microsoft.Moles.Framework; using Microsoft.VisualStudio.TestTools.UnitTesting; [assembly: MoledType(typeof(System.IO.File))] namespace MyNamespace { //Some Code } The above allows tests to be run fine - but StyleCop complains about the using directives not being inside the namespace. Putting the usings inside the namespace gives the error that "MoledType" is not recognised. Putting both the usings and the assembly reference inside the namespace gives the error 'assembly' is not a valid attribute location for this declaration. Valid attribute locations for this declaration are 'type'. All attributes in this block will be ignored. It seems I've tried every layout I can but to no avail - either the solution won't build, the mocking won't work or StyleCop complains! Does anyone know a way to set these out so that everything's happy? Or am I going to have to ignore the StyleCop warning in this case?

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• Axis2 Class Generation

  - by Jack

  I have an instance of a derived class (called Child) that I would like to send between the client and server of my web service. However, the method that might be returning this instance, is marked as returning an instance of the parent class (called Parent). For example: public class Service{public Parent createInstanceOfParentOrChildObject();} While Child is not a parameter anywhere in the service nor is it ever specifically named as a return type (only Parent is ever named), it is nonetheless generated and returned inside certain methods (and then cast to Parent). I generated the wsdl file using Axis2 1.4.1 java2wsdl and specifying that it include this class (using the -xc parameter). I did not use Axis2 1.5.1 because it was not honoring the -xc parameter though it looks like that bug is supposedly fixed in Axis2 1.6. I even did a quick check of the generated .wsdl file to ensure that it did indeed include a definition for Child (and, of course, Parent). However, when I used wsdl2java to generate the server-side (and client-side) code, Child was not generated. How can I get wsdl2java to generate Child? I realize that I could do this by hand but I don't want to have to do this for both the client and server. I was also hoping that I could make this as easy as possible for people to use my wsdl to generate their own clients.

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• Is using a StringBuilder for writing XML ok?

  - by Jack Lawson

  It feels dirty. But maybe it isn't... is it ok to use a StringBuilder for writing XML? My gut instinct says "although this feels wrong, it's probably pretty darn performant because it's not loading extra libraries and overhead." Here's what it looks like. I'm building an OpenSearch XML doc based on the domain you come in from. public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/xml"; string domain = WebUtils.ReturnParsedSourceUrl(null); //returns something like www.sample.com string cachedChan = context.Cache[domain + "_opensearchdescription"] as String; if (cachedChan == null) { StringBuilder sb = new StringBuilder(); sb.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); sb.Append("<OpenSearchDescription xmlns=\"http://a9.com/-/spec/opensearch/1.1/\" xmlns:moz=\"http://www.mozilla.org/2006/browser/search/\">"); sb.Append(" <ShortName>Search</ShortName>"); sb.Append(" <Description>Use " + domain + " to search.</Description>"); sb.Append(" <Contact>[email protected]</Contact>"); sb.Append(" <Url type=\"text/html\" method=\"get\" template=\"http://" + domain + "/Search.aspx?q={searchTerms}\" />"); sb.Append(" <moz:SearchForm>http://" + domain + "/Search.aspx</moz:SearchForm>"); sb.Append(" <Image height=\"16\" width=\"16\" type=\"image/x-icon\">http://" + domain + "/favicon.ico</Image>"); sb.Append("</OpenSearchDescription>"); cachedChan = sb.ToString(); context.Cache.Insert(domain + "_opensearchdescription", cachedChan, null, DateTime.Now.AddDays(14), TimeSpan.Zero); } context.Response.Write(cachedChan); }

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• check status application pool iis7 with csharp (access-denied)

  - by jack

  I need to monitor the status of an application in the applications pool of IIS 7 from an other machine on the same domain. My monitoring application must be in C# and running as a Windows service. On my server, I create a user with administration rights and I execute the command aspnet_regiis -ga machine\username wich worked succesfully. My problem is when I try to access the application pool i still get COMExcepttion "Access denied". What did i do wrong or wich step did i miss? I used code from http://patelshailesh.com/index.php/create-a-website-application-pool-programmatically-using-csharp as example. int status = 0; string ipAddress = "10.20.2.13"; string username = "username"; string password = "password"; try { DirectoryEntry de = new DirectoryEntry(string.Format("IIS://{0}/W3SVC/AppPools/MyAppPoolName", ipAddress), username, password); //the exception is thron here. status = (int)de.InvokeGet("AppPoolState"); switch (status) { case 2: //Runnig break; case 4: //Stopped break; default: break; } } catch (Exception ex) { }

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• How to deal with recursive dependencies between static libraries using the binutils linker?

  - by Jack Lloyd

  I'm porting an existing system from Windows to Linux. The build is structured with multiple static libraries. I ran into a linking error where a symbol (defined in libA) could not be found in an object from libB. The linker line looked like g++ test_obj.o -lA -lB -o test The problem of course being that by the time the linker finds it needs the symbol from libA, it has already passed it by, and does not rescan, so it simply errors out even though the symbol is there for the taking. My initial idea was of course to simply swap the link (to -lB -lA) so that libA is scanned afterwards, and any symbols missing from libB that are in libA are picked up. But then I find there is actually a recursive dependency between libA and libB! I'm assuming the Visual C++ linker handles this in some way (does it rescan by default?). Ways of dealing with this I've considered: Use shared objects. Unfortunately this is undesirable from the perspective of requiring PIC compliation (this is performance sensitive code and losing %ebx to hold the GOT would really hurt), and shared objects aren't needed. Build one mega ar of all of the objects, avoiding the problem. Restructure the code to avoid the recursive dependency (which is obviously the Right Thing to do, but I'm trying to do this port with minimal changes). Do you have other ideas to deal with this? Is there some way I can convince the binutils linker to perform rescans of libraries it has already looked at when it is missing a symbol?

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• Oracle Enterprise Server SOAP/Servlet/SoapRouter

  - by JACK

  Does anyone know any sample Oracle SOAP XML requests that that queries the database? For example, the url: http://myoracle:7778/oracle/soap/soaprouter/ I'd like to program xml requests and get return xml database. But I have no idea on the Oracle SOAP format. Please provide an example.

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• Java parsing UTF8

  - by Jack

  I have the following issue with a UTF8 files structured as following: FIELD1§FIELD2§FIELD3§FIELD4 Looking at hexadecimal values of the file it uses A7 to codify §. So according to this codify it should be UTF8, but it's strange because A7 7F so 1 byte shouldn't be enough to codify §. So I tried using directly a BufferedReader with a specified charset: BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(input), utf8)) but when I try to tokenize the string with SmartTokenizer st = new SmartTokenizer(toTokenize, "§") (the SmartTokenizer is a modified version of the StringTokenizer that keeps empty tokens) no splitting occurs, and if I try to print the string I obtain FIELD1?FIELD2?FIELD3?... so § used in the file is different from the one specified as a the delimiter, and it's not able to print out it too. So what's the problem here? Maybe the original file should use 2 bytes to store §?

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• How do I create an empty custom table in Wix

  - by Samuel Jack

  How do I get Wix to include a CustomTable with no rows in the final MSI? If I simply define the table like this <CustomTable Id="MyTable"> <Column Id="Id" Type="string" Category="Identifier" PrimaryKey="yes"/> <Column Id="Root" Type="string"/> <Column Id="Key" Type="string"/> <Column Id="Name" Type="string"/> </CustomTable> Wix omits it from the final output. My CustomAction is expecting it to be there, so that it can add rows to it during execution. Any ideas?

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• Windows Media Player Device Sync in VB.NET using WMPLIB

  - by Jack Hayter

  The MSDN documentation for WMPLIB states that syncing to device is not supported in .NET programming, only C++. Is there, however, a simple wrapper class or DLL that can be used to interface between a .NET program and the nescessary C++ code? Or is there a better way to sync files to a device using VB.NET? Are all devices suited/compatible with just a simple filesystem.copyfile ?

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• Attaching a static library to an iphone/ipad application

  - by Jack

  Hello, which is the best approach to include a static library with into an application for iPhone or iPad? I could choose to compile the library supplying right platform and building a library file with the ar utility and then add as a framework to the project including the source of the library .c/.h and compile them together with the application The first approach seems simpler, because I won't care about managing all specific settings of the library I want to include but how can I create the library both for iPhone and iPad and allow xcode to use the right library upon linking? The second approach seems more complex since xcode will take care about compiling my application and the library (with different settings I suppose) then how should I go? I can easily add sources of the lib but I'll have to include the make scripts to allow xcode use them to build in the right way. Any suggestions about how to proceed? The library I'm trying to include is libssh. (I know that this library, of course, has already been compiled and tried succesfully on iPhone) Thanks in advance.

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• Mysql CASE - WHEN - THEN - returning wrong data type (blob)

  - by Jack

  Hi there. Im creating customizable product attributes in a web store - each attribute can have different type of data, each data type is stored in a separate column using corresponding mysql datatype. I Have a query like: SELECT products.id AS id, products.sku AS sku, products.name AS name, products.url_key AS url_key, attributes.name AS attribute, CASE WHEN `attribute_types`.`type` = 'text' THEN product_attribute_values.value_text WHEN `attribute_types`.`type` = 'float' THEN product_attribute_values.value_float WHEN `attribute_types`.`type` = 'price' THEN product_attribute_values.value_float WHEN `attribute_types`.`type` = 'integer' THEN product_attribute_values.value_integer WHEN `attribute_types`.`type` = 'multiple' THEN product_attribute_values.value_text WHEN `attribute_types`.`type` = 'dropdown' THEN product_attribute_values.value_text WHEN `attribute_types`.`type` = 'date' THEN product_attribute_values.value_date WHEN `attribute_types`.`type` = 'textarea' THEN product_attribute_values.value_textarea END as value from (...) Now, the problem is that when attribute_types.type equals to ?some-type? i want it to return a value as it's stored in product_attribute_values table. Currently I get BLOb every time. Should I use type-casting or there's some behind-the-scene magic that I dont know about, OR maybe there's some better alternative ?

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• Why can't nvcc find my Visual C++ installation?

  - by Jack Lloyd

  I'm running Windows 7 Pro x64 on a Core i5 with a NVIDIA 3100m, which is CUDA compatible. I've tried installing both the 32-bit and 64-bit CUDA toolkits from NVIDIA, unfortunately from with either of them I cannot compile anything; nvcc says "cannot find a supported cl version. Only MSVC 8.0 and MSVC 9.0 are supported". I have the x86 and x86-64 compilers installed via the Windows 7 SDK (compiler version 15.00.30729.01 for both arches). Both compilers are operating correctly; I've built and tested C and C++ code using them. I've tried running nvcc from command shells set up for both 32 bit and 64 bit compilation, and using the -ccbin command line option to nvcc to point it at the Visual C++ install directory. What is the right way of handling this setup? Is there some way I make nvcc be more verbose about what is going on? The -v flag isn't terrible helpful. Ideally some way to make it show what it is finding versus what it's expecting to find. Will this work better if I install Visual C++ Express instead? Or is only a commercial version of VC++ supported for use with CUDA?

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• How to get stack trace of a running process from within a Visual Studio add-in?

  - by Jack

  I am writing a Visual Studio add-in in C# which will run while I am debugging a process in the same Visual Studio window and I need access to that the process' stack trace from within my add-in. I tried putting this code into my add-in but it returns the add-in's stack trace, not the process I am debugging. System.Diagnostics.StackTrace stacktrace = new System.Diagnostics.StackTrace(true); System.Diagnostics.StackFrame stackframe = stacktrace.GetFrame(0); Any help would be appreciated.

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• Problem with printing output using PHP library

  - by Jack

  I am using the PHP library tools on a we hosting service( with cURL enabled). I have so far tried 2 tools but I cant get the output of my code to print to the screen. http://github.com/jdp/twitterlibphp - PHP library Sample code - <?php require("twitter.lib.php"); $twitter = new Twitter("xxxx", "xxxxx"); $public_timeline = $twitter->getPublicTimeline(); echo'<pre>'; print_r( $public_timeline ); echo'</pre>'; ?> I don't get any output. What can be the problem? Do I need to install any modules or packages? Please Help

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• DjangoUnicodeDecodeError while storing pickle'd data.

  - by Jack M.

  I've got a simple dict object I'm trying to store in the database after it has been run through pickle. It seems that Django doesn't like trying to encode this error. I've checked with MySQL, and the query isn't even getting there before it is throwing the error, so I don't believe that is the problem. The dict I'm storing looks like this: { 'ordered': [ { 'value': u'First\xd1ame Last\xd1ame', 'label': u'Full Name' }, { 'value': u'123-456-7890', 'label': u'Phone Number' }, { 'value': u'[email protected]', 'label': u'Email Address' } ], 'cleaned_data': { u'Phone Number': u'123-456-7890', u'Full Name': u'First\xd1ame Last\xd1ame', u'Email Address': u'[email protected]' }, 'post_data': <QueryDict: { u'Phone Number': [u'1234567890'], u'Full Name_1': [u'Last\xd1ame'], u'Full Name_0': [u'First\xd1ame'], u'Email Address': [u'[email protected]'] }>, 'user': <User: itis> } The error that gets thrown is: 'utf8' codec can't decode bytes in position 52-53: invalid data. Position 52-53 is the first instance of \xd1 (Ñ) in the pickled data. So far, I've dug around StackOverflow and found a few questions where the database encoding for the objects was wrong. This doesn't help me because there is no MySQL query yet. This is happening before the database. Google also didn't help much when searching for unicode errors on pickled data. It is probably worth mentioning that if I don't use the Ñ, this code works fine.

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• How to get stack trace of a running process from a Visual Studio add-in?

  - by Jack

  I am writing a Visual Studio add-in in C# and I need access to the currently running process' stack trace. I tried putting this code into my add-in but it returns the add-in's stack trace, not the process I am debugging. System.Diagnostics.StackTrace stacktrace = new System.Diagnostics.StackTrace(true); System.Diagnostics.StackFrame stackframe = stacktrace.GetFrame(0); Any help would be appreciated.

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• Filter a LINQ query

  - by Jack Marchetti

  Here's my query. var query = from g in dc.Group join gm in dc.GroupMembers on g.ID equals gm.GroupID where gm.UserID == UserID select new { id = g.ID, name = g.Name, pools = (from pool in g.Pool // more stuff to populate pools So I have to perform some filtering, but when I attempt to filter var filter = query.Where(f => f.pools.[no access to list of columns] I can't access any of the items within "pools". Does anyone know how I'm able to access that? What I'd like to do is this: var filterbyGame = query.Where(f = > f.pools.GameName == "TestGame"); Let me know if that's even possible with thew ay I have this setup. Thanks guys.

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• Geocoding Chinese addresses using Google Maps API in Python?

  - by Jack Low

  I have looked into Geopy and googlemaps (http://py-googlemaps.sourceforge.net/) and they both do not work for Chinese addresses. My app is stored on the Google App Engine. What I want to do is to parse a file containing addresses of restaurants in Hong Kong, and then Geocode the addresses and store the Lat and Lng in the datastore. How do I do this?

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• How to get cursor to follow text when reading a web page?

  - by Jack BeNimble

  I know this isn't strictly program related, but I think I've seen this answer on SO before and lost track of it. The specific question has to do with reading an electronic document. I find it helpful to move the cursor across the words as I'm reading them. This works great with Word documents, but I'm unable to do it with web pages. Is there a way to make a web page see and respond to cursor movement?

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• Using AWT components inside a JInnerFrame (for JDesktopPane)

  - by Jack

  Hello, is there a way to hack bugs related to adding an AWT component (in my case a PApplet, so a processing language sketch) inside a JInternalFrame? It works but not as intended, since it flickers and dragging the frame causes repaint issues.. reading around it seems that, althrough it's possible to mix heavyweight (AWT) and lightweight (Swing) components some problems seem to be unavoidable.. is it true? Thanks!

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• Register all GUI components as Observers or pass current object to next object as a constructor argu

  - by Jack

  First, I'd like to say that I think this is a common issue and there may be a simple or common solution that I am unaware of. Many have probably encountered a similar problem. Thanks for reading. I am creating a GUI where each component needs to communicate (or at least be updated) by multiple other components. Currently, I'm using a Singleton class to accomplish this goal. Each GUI component gets the instance of the singleton and registers itself. When updates need to be made, the singleton can call public methods in the registered class. I think this is similar to an Observer pattern, but the singleton has more control. Currently, the program is set up something like this: class c1 { CommClass cc; c1() { cc = CommClass.getCommClass(); cc.registerC1( this ); C2 c2 = new c2(); } } class c2 { CommClass cc; c2() { cc = CommClass.getCommClass(); cc.registerC2( this ); C3 c3 = new c3(); } } class c3 { CommClass cc; c3() { cc = CommClass.getCommClass(); cc.registerC3( this ); C4 c4 = new c4(); } } etc. Unfortunately, the singleton class keeps growing larger as more communication is required between the components. I was wondering if it's a good idea to instead of using this singleton, pass the higher order GUI components as arguments in the constructors of each GUI component: class c1 { c1() { C2 c2 = new c2( this ); } } class c2 { C1 c1; c2( C1 c1 ) { this.c1 = c1 C3 c3 = new c3( c1, this ); } } class c3 { C1 c1; C2 c2; c3( C1 c1, C2 c2 ) { this.c1 = c1; this.c2 = c2; C4 c4 = new c4( c1, c2, this ); } } etc. The second version relies less on the CommClass, but it's still very messy as the private member variables increase in number and the constructors grow in length. Each class contains GUI components that need to communicate through CommClass, but I can't think of a good way to do it. If this seems strange or horribly inefficient, please describe some method of communication between classes that will continue to work as the project grows. Also, if this doesn't make any sense to anyone, I'll try to give actual code snippets in the future and think of a better way to ask the question. Thanks.

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