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• What is the preferred way in C++ for converting a builtin type (int) to bool?

  - by Martin

  When programming with Visual C++, I think every developer is used to see the warning warning C4800: 'BOOL' : forcing value to bool 'true' or 'false' from time to time. The reason obviously is that BOOL is defined as int and directly assigning any of the built-in numerical types to bool is considered a bad idea. So my question is now, given any built-in numerical type (int, short, ...) that is to be interpreted as a boolean value, what is the/your preferred way of actually storing that value into a variable of type bool? Note: While mixing BOOL and bool is probably a bad idea, I think the problem will inevitably pop up whether on Windows or somewhere else, so I think this question is neither Visual-C++ nor Windows specific. Given int nBoolean; I prefer this style: bool b = nBoolean?true:false; The following might be alternatives: bool b = !!nBoolean; bool b = (nBoolean != 0); Is there a generally preferred way? Rationale? I should add: Since I only work with Visual-C++ I cannot really say if this is a VC++ specific question or if the same problem pops up with other compilers. So it would be interesting to specifically hear from g++ or users how they handle the int-bool case. Regarding Standard C++: As David Thornley notes in a comment, the C++ Standard does not require this behavior. In fact it seems to explicitly allow this, so one might consider this a VC++ weirdness. To quote the N3029 draft (which is what I have around atm.): 4.12 Boolean conversions [conv.bool] A prvalue of arithmetic, unscoped enumeration, pointer, or pointer to member type can be converted to a prvalue of type bool. A zero value, null pointer value, or null member pointer value is converted to false; any other value is converted to true. (...)

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• Strongly Typed DataSet column requires custom type to implement IXmlSerializable?

  - by Phil

  I have a strongly typed Dataset with a single table with three columns. These columns all contain custom types. DataColumn1 is of type Parent DataColumn2 is of type Child1 DataColumn3 is of type Child2 Here is what these classes look like: [Serializable] [XmlInclude(typeof(Child1)), XmlInclude(typeof(Child2))] public abstract class Parent { public int p1; } [Serializable] public class Child1 :Parent { public int c1; } [Serializable] public class Child2 : Parent { public int c1; } now, if I add a row with DataColumn1 being null, and DataColumns 2 and 3 populated and try to serialize it, it works: DataSet1 ds = new DataSet1(); ds.DataTable1.AddDataTable1Row(null, new Child1(), new Child2()); StringBuilder sb = new StringBuilder(); using (StringWriter writer = new StringWriter(sb)) { ds.WriteXml(writer);//Works! } However, if I try to add a value to DataColumn1, it fails: DataSet1 ds = new DataSet1(); ds.DataTable1.AddDataTable1Row(new Child1(), new Child1(), new Child2()); StringBuilder sb = new StringBuilder(); using (StringWriter writer = new StringWriter(sb)) { ds.WriteXml(writer);//Fails! } Here is the Exception: "Type 'WindowsFormsApplication4.Child1, WindowsFormsApplication4, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' does not implement IXmlSerializable interface therefore can not proceed with serialization." I have also tried using the XmlSerializer to serialize the dataset, but I get the same exception. Does anyone know of a way to get around this where I don't have to implement IXmlSerializable on all the Child classes? Alternatively, is there a way to implement IXmlSerializable keeping all default behavior the same (ie not having any class specific code in the ReadXml and WriteXml methods)

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• Unity in C# for Platform Specific Implementations

  - by DxCK

  My program has heavy interaction with the operating system through Win32API functions. now i want to migrate my program to run under Mono under Linux (No wine), and this requires different implementations to the interaction with the operating system. I started designing a code that can have different implementation for difference platform and is extensible for new future platforms. public interface ISomeInterface { void SomePlatformSpecificOperation(); } [PlatformSpecific(PlatformID.Unix)] public class SomeImplementation : ISomeInterface { #region ISomeInterface Members public void SomePlatformSpecificOperation() { Console.WriteLine("From SomeImplementation"); } #endregion } public class PlatformSpecificAttribute : Attribute { private PlatformID _platform; public PlatformSpecificAttribute(PlatformID platform) { _platform = platform; } public PlatformID Platform { get { return _platform; } } } public static class PlatformSpecificUtils { public static IEnumerable<Type> GetImplementationTypes<T>() { foreach (Assembly assembly in AppDomain.CurrentDomain.GetAssemblies()) { foreach (Type type in assembly.GetTypes()) { if (typeof(T).IsAssignableFrom(type) && type != typeof(T) && IsPlatformMatch(type)) { yield return type; } } } } private static bool IsPlatformMatch(Type type) { return GetPlatforms(type).Any(platform => platform == Environment.OSVersion.Platform); } private static IEnumerable<PlatformID> GetPlatforms(Type type) { return type.GetCustomAttributes(typeof(PlatformSpecificAttribute), false) .Select(obj => ((PlatformSpecificAttribute)obj).Platform); } } class Program { static void Main(string[] args) { Type first = PlatformSpecificUtils.GetImplementationTypes<ISomeInterface>().FirstOrDefault(); } } I see two problems with this design: I can't force the implementations of ISomeInterface to have a PlatformSpecificAttribute. Multiple implementations can be marked with the same PlatformID, and i dont know witch to use in the Main. Using the first one is ummm ugly. How to solve those problems? Can you suggest another design?

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• PHP OOP: Avoid Singleton/Static Methods in Domain Model Pattern

  - by sunwukung

  I understand the importance of Dependency Injection and its role in Unit testing, which is why the following issue is giving me pause: One area where I struggle not to use the Singleton is the Identity Map/Unit of Work pattern (Which keeps tabs on Domain Object state). //Not actual code, but it should demonstrate the point class Monitor{//singleton construction omitted for brevity static $members = array();//keeps record of all objects static $dirty = array();//keeps record of all modified objects static $clean = array();//keeps record of all clean objects } class Mapper{//queries database, maps values to object fields public function find($id){ if(isset(Monitor::members[$id]){ return Monitor::members[$id]; } $values = $this->selectStmt($id); //field mapping process omitted for brevity $Object = new Object($values); Monitor::new[$id]=$Object return $Object; } $User = $UserMapper->find(1);//domain object is registered in Id Map $User->changePropertyX();//object is marked "dirty" in UoW // at this point, I can save by passing the Domain Object back to the Mapper $UserMapper->save($User);//object is marked clean in UoW //but a nicer API would be something like this $User->save(); //but if I want to do this - it has to make a call to the mapper/db somehow $User->getBlogPosts(); //or else have to generate specific collection/object graphing methods in the mapper $UserPosts = $UserMapper->getBlogPosts(); $User->setPosts($UserPosts); Any advice on how you might handle this situation? I would be loathe to pass/generate instances of the mapper/database access into the Domain Object itself to satisfy DI - At the same time, avoiding that results in lots of calls within the Domain Object to external static methods. Although I guess if I want "save" to be part of its behaviour then a facility to do so is required in its construction. Perhaps it's a problem with responsibility, the Domain Object shouldn't be burdened with saving. It's just quite a neat feature from the Active Record pattern - it would be nice to implement it in some way.

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• LINQ .Cast() extension method fails but (type)object works.

  - by Ben Robinson

  To convert between some LINQ to SQL objects and DTOs we have created explicit cast operators on the DTOs. That way we can do the following: DTOType MyDTO = (LinqToSQLType)MyLinq2SQLObj; This works well. However when you try to cast using the LINQ .Cast() extension method it trows an invalid cast exception saying cannot cast type Linq2SQLType to type DTOType. i.e. the below does not work List<DTO.Name> Names = dbContact.tNames.Cast<DTO.Name>() .ToList(); But the below works fine: DAL.tName MyDalName = new DAL.tName(); DTO.Name MyDTOName = (DTO.Name)MyDalName; and the below also works fine List<DTO.Name> Names = dbContact.tNames.Select(name => (DTO.Name)name) .ToList(); Why does the .Cast() extension method throw an invalid cast exception? I have used the .Cast() extension method in this way many times in the past and when you are casting something like a base type to a derived type it works fine, but falls over when the object has an explicit cast operator.

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• function not printing out anything

  - by Abdul Latif

  I have the following function below: public function setupHead($title){ $displayHead .='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>'.$title.'</title>'; $displayHead .='<script type="text/javascript" src="'.PATH.'js/jquery-1.3.2.min.js"></script> <script type="text/javascript" src="'.PATH.'js/thickbox.js"></script> <script type="text/javascript" src="'.PATH.'js/ui.core.js"></script> <!--<script type="text/javascript" src="'.PATH.'js/js.js"></script>--> <link rel="stylesheet" href="'.PATH.'css/thickbox.css" type="text/css" media="screen" /> <link rel="stylesheet" type="text/css" href="'.PATH.'css/styles.css"> <link rel="stylesheet" type="text/css" href="'.PATH.'css/menu_allbrowsers.css"> <link rel="stylesheet" href="'.PATH.'css/news.css" type="text/css" media="screen" /> <link rel="stylesheet" href="'.PATH.'css/text.css" type="text/css" media="screen" /> <script type="text/javascript" src="'.PATH.'js/swfobject.js"></script> <!--[if IE 7]><link rel="stylesheet" type="text/css" href="'.PATH.'css/IE7menu.css" /><![endif]--> <!--[if IE 6]><link rel="stylesheet" type="text/css" href="'.PATH.'css/ie6.css" /><![endif]--> <!--[if IE 7]><link rel="stylesheet" type="text/css" href="'.PATH.'css/ie7.css" /><![endif]--> </head>'; return $displayHead; } but when it call is using: echo classname->setupHead($title); nothing gets displayed. doesn't php allow html in strings? Thanks in advance

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• remove the blank rows after i removed xml elements?

  - by fayer

  i removed some elements from a xml file with simpledom. the code: $this->xmlDocument->removeNodes("//entity[name='mac']"); here is the initial file: <entity id="1000070"> <name>apple</name> <type>category</type> <entities> <entity id="7002870"> <name>mac</name> <type>category</type> </entity> <entity id="7024080"> <name>iphone</name> <type>category</type> </entity> <entity id="7024080"> <name>ipad</name> <type>category</type> </entity> </entities> </entity> the file afterwards: <entity id="1000070"> <name>apple</name> <type>category</type> <entities> <entity id="7024080"> <name>iphone</name> <type>category</type> </entity> <entity id="7024080"> <name>ipad</name> <type>category</type> </entity> </entities> </entity> i wonder how i could also remove the blank lines that are left after i ran the removal code? thanks!

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• C#: at design time, how can I reliably determine the type of a variable that is declared using var?

  - by Cheeso

  I'm working on a completion (intellisense) facility for C# in emacs. The idea is, if a user types a fragment, then asks for completion via a particular keystroke combination, the completion facility will use .NET reflection to determine the possible completions. Doing this requires that the type of the thing being completed, be known. If it's a string, it has a set of known methods; if it's an Int32, it has a separate set of methods, and so on. Using semantic, a code lexer/parser package available in emacs, I can locate the variable declarations, and their types. Given that, it's straightforward to use reflection to get the methods and properties on the type, and then present the list of options to the user. The problem arrives when the code uses var in the declaration. How can I reliably determine the actual type used, when the variable is declared with the var keyword? Just to be clear, I don't need to determine it at runtime. I want to determine it at "Design time". So far the best idea I have is: extract the declaration statement, eg var foo = "a string value"; concatenate a statement foo.GetType(); dynamically compile the resulting C# fragment it into a new assembly load the assembly into a new AppDomain, run the framgment and get the return type. unload and discard the assembly This sounds awfully heavyweight, for each completion request in the editor. Any better ideas out there?

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• WCF: get generic type object (e.g. MyObject<T>) from remote machine

  - by Aaron

  I have two applications that are communicating through WCF. On the server the following object exists: public class MyObject<T> { ... public Entry<T> GetValue() } Where Entry<T> is another object with T Data as a public property. T could be any number of types (string, double, etc) On the client I have ClientObject<T> that needs to get the value of Data from the server (same type). Since I'm using WCF, I have to define my ServiceContract as an interface, and I can't have ClientObject<T> call Entry<T> GetMyObjectValue (string Name) which calls GetValue on the correct MyObject<T> because my interface isn't aware of the type information. I've tried implementing separate GetValue functions (GetMyObjectValueDouble, GetMyObjectValueString) in the interface and then have ClientObject determine the correct one to call. However, Entry<T> val = (Entry<T>)GetMyObjectValueDouble(...); doesn't work because it's not sure about the type information. How can I go about getting a generic object over WCF with the correct type information? Let me know if there are other details I can provide. Thanks!

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• How do I set an og:type for the first time without losing likes?

  - by Travis

  When I first created my site, I neglected to add the Open Graph tags that Facebook recommends (http://developers.facebook.com/docs/opengraph/), and the site now has about 1200 Facebook likes through a fb:comments widget. http://graph.facebook.com/http://feedtheanimalssamples.com/ shows this: { "id": "http://feedtheanimalssamples.com/", "shares": 1204 } Recently, I've added added the following OG tags: <meta property="fb:app_id" content="59193243341" /> <meta property="og:title" content="Girl Talk - Feed The Animals Samples (old)" /> <meta property="og:image" content="http://feedtheanimalssamples.com/fta_small.png" /> <meta property="og:url" content="http://feedtheanimalssamples.com" /> But when I add the og:type tag: <meta property="og:type" content="website" /> and Lint the site, I lose all my likes. http://graph.facebook.com/http://feedtheanimalssamples.com/ starts showing this: { "id": "170545342993850", "name": "Girl Talk - Feed The Animals Samples", "picture": "http://profile.ak.fbcdn.net/hprofile-ak-snc4/188039_170545342993850_3277642_s.jpg", "link": "http://www.facebook.com/pages/Girl-Talk-Feed-The-Animals-Samples/170545342993850", "category": "Website", "website": "http://feedtheanimalssamples.com/", "description": "Interactively identifies the samples in the 2008 album 'Feed The Animals' by mashup artist Girl Talk.", "likes": 1 } (Note the "likes": 1.) So: How do I set the og:type without losing my likes? I'm trying to let my likers know that I've created a new and improved site. I'm following the instuctions at http://developers.facebook.com/blog/post/397 under "Publishing to Connected Users via Graph API", but using that API apparently requires specifying an og:type. Thanks!

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• C++ and its type system: How to deal with data with multiple types?

  - by sub

  "Introduction" I'm relatively new to C++. I went through all the basic stuff and managed to build 2-3 simple interpreters for my programming languages. The first thing that gave and still gives me a headache: Implementing the type system of my language in C++ Think of that: Ruby, Python, PHP and Co. have a lot of built-in types which obviously are implemented in C. So what I first tried was to make it possible to give a value in my language three possible types: Int, String and Nil. I came up with this: enum ValueType { Int, String, Nil }; class Value { public: ValueType type; int intVal; string stringVal; }; Yeah, wow, I know. It was extremely slow to pass this class around as the string allocator had to be called all the time. Next time I've tried something similar to this: enum ValueType { Int, String, Nil }; extern string stringTable[255]; class Value { public: ValueType type; int index; }; I would store all strings in stringTable and write their position to index. If the type of Value was Int, I just stored the integer in index, it wouldn't make sense at all using an int index to access another int, or? Anyways, the above gave me a headache too. After some time, accessing the string from the table here, referencing it there and copying it over there grew over my head - I lost control. I had to put the interpreter draft down. Now: Okay, so C and C++ are statically typed. How do the main implementations of the languages mentioned above handle the different types in their programs (fixnums, bignums, nums, strings, arrays, resources,...)? What should I do to get maximum speed with many different available types? How do the solutions compare to my simplified versions above?

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• Fortran pointer as an argument to interface procedure

  - by icarusthecow

  Im trying to use interfaces to call different subroutines with different types, however, it doesnt seem to work when i use the pointer attribute. for example, take this sample code MODULE ptr_types TYPE, abstract :: parent INTEGER :: q END TYPE TYPE, extends(parent) :: child INTEGER :: m END TYPE INTERFACE ptr_interface MODULE PROCEDURE do_something END INTERFACE CONTAINS SUBROUTINE do_something(atype) CLASS(parent), POINTER :: atype ! code determines that this allocation is correct from input ALLOCATE(child::atype) WRITE (*,*) atype%q END SUBROUTINE END MODULE PROGRAM testpass USE ptr_types CLASS(child), POINTER :: ctype CALL ptr_interface(ctype) END PROGRAM This gives error Error: There is no specific subroutine for the generic 'ptr_interface' at (1) however if i remove the pointer attribute in the subroutine it compiles fine. Now, normally this wouldnt be a problem, but for my use case i need to be able to treat that argument as a pointer, mainly so i can allocate it if necessary. Any suggestions? Mind you I'm new to fortran so I may have missed something edit: forgot to put the allocation in the parents subroutine, the initial input is unallocated EDIT 2 this is my second attempt, with caller side casting MODULE ptr_types TYPE, abstract :: parent INTEGER :: q END TYPE TYPE, extends(parent) :: child INTEGER :: m END TYPE TYPE, extends(parent) :: second INTEGER :: meow END TYPE CONTAINS SUBROUTINE do_something(this, type_num) CLASS(parent), POINTER :: this INTEGER type_num IF (type_num == 0) THEN ALLOCATE (child::this) ELSE IF (type_num == 1) THEN ALLOCATE (second::this) ENDIF END SUBROUTINE END MODULE PROGRAM testpass USE ptr_types CLASS(child), POINTER :: ctype SELECT TYPE(ctype) CLASS is (parent) CALL do_something(ctype, 0) END SELECT WRITE (*,*) ctype%q END PROGRAM however this still fails. in the select statement it complains that parent must extend child. Im sure this is due to restrictions when dealing with the pointer attribute, for type safety, however, im looking for a way to convert a pointer into its parent type for generic allocation. Rather than have to write separate allocation functions for every type and hope they dont collide in an interface or something. hopefully this example will illustrate a little more clearly what im trying to achieve, if you know a better way let me know

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• How to make restrictions on XML Schema Complex type?

  - by chobo2

  Hi I am reading the tutorials on w3cschools ( http://www.w3schools.com/schema/schema_complex.asp ) but they don't seem to mention how you could add restrictions on complex types. Like for instance I have this schema. <xs:element name="employee"> <xs:complexType> <xs:sequence> <xs:element name="firstname" type="xs:string"/> <xs:element name="lastname" type="xs:string"/> </xs:sequence> </xs:complexType> </xs:element> now I want to make sure the firstname is no more then 10 characters long. How do I do this? I tried to put in the simple type for the firstname but it says I can't do that since I am using a complex type. So how do I put restrictions like that on the file so the people who I give the schema to don't try to make the firstname 100 characters.

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• Pass the return type as a parameter in java?

  - by jonderry

  I have some files that contain logs of objects. Each file can store objects of a different type, but a single file is homogeneous -- it only stores objects of a single type. I would like to write a method that returns an array of these objects, and have the array be of a specified type (the type of objects in a file is known and can be passed as a parameter). Roughly, what I want is something like the following: public static <T> T[] parseLog(File log, Class<T> cls) throws Exception { ArrayList<T> objList = new ArrayList<T>(); FileInputStream fis = new FileInputStream(log); ObjectInputStream in = new ObjectInputStream(fis); try { Object obj; while (!((obj = in.readObject()) instanceof EOFObject)) { T tobj = (T) obj; objList.add(tobj); } } finally { in.close(); } return objList.toArray(new T[0]); } The above code doesn't compile (there's an error on the return statement, and a warning on the cast), but it should give you the idea of what I'm trying to do. Any suggestions for the best way to do this?

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• When calling a static method on parent class, can the parent class deduce the type on the child (C#)

  - by Matt

  Suppose we have 2 classes, Child, and the class from which it inherits, Parent. class Parent { public static void MyFunction(){} } class Child : Parent { } Is it possible to determine in the parent class how the method was called? Because we can call it two ways: Parent.MyFunction(); Child.MyFunction(); My current approach was trying to use: MethodInfo.GetCurrentMethod().ReflectedType; // and MethodInfo.GetCurrentMethod().DeclaringType; But both appear to return the Parent type. If you are wondering what, exactly I am trying to accomplish (and why I am violating the basic OOP rule that the parent shouldn't have to know anything about the child), the short of it is this (let me know if you want the long version): I have a Model structure representing some of our data that persists to the database. All of these models inherit from an abstract Parent. This parent implements a couple of events, such as SaveEvent, DeleteEvent, etc. We want to be able to subscribe to events specific to the type. So, even though the event is in the parent, I want to be able to do: Child.SaveEvent += new EventHandler((sender, args) => {}); I have everything in place, where the event is actually backed by a dictionary of event handlers, hashed by type. The last thing I need to get working is correctly detecting the Child type, when doing Child.SaveEvent. I know I can implement the event in each child class (even forcing it through use of abstract), but it would be nice to keep it all in the parent, which is the class actually firing the events (since it implements the common save/delete/change functionality).

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• Why is Scala's type inferencer not able to resolve this?

  - by Levi Greenspan

  In the code snippet below - why do I have to give a type annotation for Nil? Welcome to Scala version 2.8.0.RC2 (OpenJDK Server VM, Java 1.6.0_18). Type in expressions to have them evaluated. Type :help for more information. scala> List(Some(1), Some(2), Some(3), None).foldLeft(Nil)((lst, o) => o match { case Some(i) => i::lst; case None => lst }) <console>:6: error: type mismatch; found : List[Int] required: object Nil List(Some(1), Some(2), Some(3), None).foldLeft(Nil)((lst, o) => o match { case Some(i) => i::lst; case None => lst }) ^ scala> List(Some(1), Some(2), Some(3), None).foldLeft(Nil:List[Int])((lst, o) => o match { case Some(i) => i::lst; case None => lst }) res1: List[Int] = List(3, 2, 1)

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• (Java) Is there a type of object that can handle anything from primitives to arrays?

  - by Michael

  I'm pretty new to Java, so I'm hoping one of you guys knows how to do this. I'm having the user specify both the type and value of arguments, in any XML-like way, to be passed to methods that are external to my application. Example: javac myAppsName externalJavaClass methodofExternalClass [parameters] Of course, to find the proper method, we have to have the proper parameter types as the method may be overloaded and that's the only way to tell the difference between the different versions. Parameters are currently formatted in this manner: (type)value(/type), e.g. (int)71(/int) (string)This is my string that I'm passing as a parameter!(/string) I parse them, getting the constructor for whatever type is indicated, then execute that constructor by running its method, newInstance(<String value>), loading the new instance into an Object. This works fine and dandy, but as we all know, some methods take arrays, or even multi-dimensional arrays. I could handle the argument formatting like so: (array)(array)(int)0(/int)(int)1(/int)(/array)(array)(int)2(/int)(int)3(/int)(/array)(/array)... or perhaps even better... {{(int)0(/int)(int)1(/int)}{(int)2(/int)(int)3(/int)}}. The question is, how can this be implemented? Do I have to start wrapping everything in an Object[] array so I can handle primitives, etc. as argObj[0], but load an array as I normally would? (Unfortunately, I would have to make it an Object[][] array if I wanted to support two-dimensional arrays. This implementation wouldn't be very pretty.)

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• Is this kind of design - a class for Operations On Object - correct?

  - by Mithir

  In our system we have many complex operations which involve many validations and DB activities. One of the main Business functionality could have been designed better. In short, there were no separation of layers, and the code would only work from the scenario in which it was first designed at, and now there were more scenarios (like requests from an API or from other devices) So I had to redesign. I found myself moving all the DB code to objects which acts like Business to DB objects, and I've put all the business logic in an Operator kind of a class, which I've implemented like this: First, I created an object which will hold all the information needed for the operation let's call it InformationObject. Then I created an OperatorObject which will take the InformationObject as a parameter and act on it. The OperatorObject should activate different objects and validate or check for existence or any scenario in which the business logic is compromised and then make the operation according to the information on the InformationObject. So my question is - Is this kind of implementation correct? PS, this Operator only works on a single Business-wise Operation.

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• Unity3D: How to make the camera focus a moving game object with ITween?

  - by nathan

  I'm trying to write a solar system with Unity3D. Planets are sphere game objects rotating around another sphere game object representing the star. What i want to achieve is let the user click on a planet and then zoom the camera on this planet and then make the camera follow and keep it centered on the screen while it keep moving around the star. I decided to use iTween library and so far i was able to create the zoom effect using iTween.MoveUpdate. My problem is that the focused planet does not say properly centered as it moves. Here is the relevant part of my script: void Update () { if (Input.GetButtonDown("Fire1")) { Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); RaycastHit hit; if (Physics.Raycast(ray, out hit, Mathf.Infinity, concernedLayers)) { selectedPlanet = hit.collider.gameObject; } } } void LateUpdate() { if (selectedPlanet != null) { Vector3 pos = selectedPlanet.transform.position; pos.z = selectedPlanet.transform.position.z - selectedPlanet.transform.localScale.z; pos.y = selectedPlanet.transform.position.y; iTween.MoveUpdate(Camera.main.gameObject, pos, 2); } } What do i need to add to this script to make the selected planet stay centered on the screen? I hosted my current project as a webplayer application so you see what's going wrong. You can access it here.

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• Dealing with 2D pixel shaders and SpriteBatches in XNA 4.0 component-object game engine?

  - by DaveStance

  I've got a bit of experience with shaders in general, having implemented a couple, very simple, 3D fragment and vertex shaders in OpenGL/WebGL in the past. Currently, I'm working on a 2D game engine in XNA 4.0 and I'm struggling with the process of integrating per-object and full-scene shaders in my current architecture. I'm using a component-entity design, wherein my "Entities" are merely collections of components that are acted upon by discreet system managers (SpatialProvider, SceneProvider, etc). In the context of this question, my draw call looks something like this: SceneProvider::Draw(GameTime) calls... ComponentManager::Draw(GameTime, SpriteBatch) which calls (on each drawable component) DrawnComponent::Draw(GameTime, SpriteBatch) The SpriteBatch is set up, with the default SpriteBatch shader, in the SceneProvider class just before it tells the ComponentManager to start rendering the scene. From my understanding, if a component needs to use a special shader to draw itself, it must do the following when it's Draw(GameTime, SpriteBatch) method is invoked: public void Draw(GameTime gameTime, SpriteBatch spriteBatch) { spriteBatch.End(); spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend, null, null, null, EffectShader, ViewMatrix); // Draw things here that are shaded by the "EffectShader." spriteBatch.End(); spriteBatch.Begin(/* same settings that were set by SceneProvider to ensure the rest of the scene is rendered normally */); } My question is, having been told that numerous calls to SpriteBatch.Begin() and SpriteBatch.End() within a single frame was terrible for performance, is there a better way to do this? Is there a way to instruct the currently running SpriteBatch to simply change the Effect shader it is using for this particular draw call and then switch it back before the function ends?

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• Why, in WPF, do we set an object to Stretch via its Alignment properties instead of Width/Height?

  - by Jonathan Hobbs

  In WPF's XAML, we can tell an element to fill its container like this: <Button HorizontalAlignment="Stretch" VerticalAlignment="Stretch" /> Why is it that when we set an element to Stretch, we do it via the HorizontalAlignment and VerticalAlignment properties? Why did the WPF design team decide to take this approach over having Width="Stretch" and Height="Stretch"? I presume it was a calculated decision, and I'm curious about the reasoning. CSS, among other technologies, follows the convention that stretching is done via the width and height properties, and that alignment affects positioning exclusively. This seems intuitive enough: stretching the element is manipulating its width and height, after all! Using the corresponding alignment property to stretch an element seems counter-intuitive and unusual in comparison. This makes me think they didn't just pick this option for no reason: they made a calculated decision and had reasons behind it. Width and Height use the double data type, which would ordinarily mean assigning it a string would be silly. However, WPF's Window objects can take Width="Auto", which gets treated as double.NaN. Couldn't Width="Stretch" be stored as double.PositiveInfinity or some other value?

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• What scenarios are implementations of Object Management Group (OMG) Data Distribution Service best suited for?

  - by mindcrime

  I've always been a big fan of asynchronous messaging and pub/sub implementations, but coming from a Java background, I'm most familiar with using JMS based messaging systems, such as JBoss MQ, HornetQ, ActiveMQ, OpenMQ, etc. I've also loosely followed the discussion of AMQP. But I recently became aware of the Data Distribution Service Specification from the Object Management Group, and found there are a couple of open-source implementations: OpenSplice OpenDDS It sounds like this stuff is focused on the kind of high-volume scenarios one tends to associate with financial trading exchanges and what-not. My current interest is more along the lines of notifications related to activity stream processing (think Twitter / Facebook) and am wondering if the DDS servers are worth looking into further. Could anyone who has practical experience with this technology, and/or a deep understanding of it, comment on how useful it is, and what scenarios it is best suited for? How does it stack up against more "traditional" JMS servers, and/or AMQP (or even STOMP or OpenWire, etc?) Edit: FWIW, I found some information at this StackOverflow thread. Not a complete answer, but anybody else finding this question might also find that thread useful, hence the added link.

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• Is there a framework for describing object oriented communication standards/protocols?

  - by martin

  Currently I'm dealing with the development of specifications for communication standards/protocols for b2b-integration based on object oriented models. I.e. if you take a look at the healthcare domain there is HL7v3 with its HDF. Now I ask if there is a more generic framework, that describes how a specification for a communication standard should be developed. For b2b-integration I want to describe a communication standard based on uml models for a broad domain. My thought was to divide the domain into subdomains and derive message type from the resulting model. There is already a given framework, but I want to compare it to another framework. My idea is to compare them using a generic framework. It should describe several levels. Does anybody know such a framework? I have searched a while on google scholar, but haven't an appropiate framework yet. The only thing I have found is ebXML, but I think it is not exactly what I need.

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• How can I use an object pool for optimization in AndEngine?

  - by coder_For_Life22

  I have read up on a tutorial that allows you to reuse sprites that are re-added to the scene such as bullets from a gun or any other objects using an ObjectPool. In my game i have a variation of sprites about 6 all together with different textures. This is how the object pool is set up with its own class extending Java's GenericPool class public class BulletPool extends GenericPool<BulletSprite> { private TextureRegion mTextureRegion; public BulletPool(TextureRegion pTextureRegion) { if (pTextureRegion == null) { // Need to be able to create a Sprite so the Pool needs to have a TextureRegion throw new IllegalArgumentException("The texture region must not be NULL"); } mTextureRegion = pTextureRegion; } /** * Called when a Bullet is required but there isn't one in the pool */ @Override protected BulletSprite onAllocatePoolItem() { return new BulletSprite(mTextureRegion); } /** * Called when a Bullet is sent to the pool */ @Override protected void onHandleRecycleItem(final BulletSprite pBullet) { pBullet.setIgnoreUpdate(true); pBullet.setVisible(false); } /** * Called just before a Bullet is returned to the caller, this is where you write your initialize code * i.e. set location, rotation, etc. */ @Override protected void onHandleObtainItem(final BulletSprite pBullet) { pBullet.reset(); } } As you see here it takes a TextureRegion parameter. The only problem i am facing with this is that i need to have 6 different sprites recycled and reused in the ObjectPool. This ObjectPool is set up to only use one TextureRegion. Any idea's or suggestions on how to do this?

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• ModSecurity compile error on nginx

  - by user146481

  I'm trying to install ModSecurity on nginx with the following instructions : wget https://github.com/SpiderLabs/ModSecurity/archive/master.zip unzip master cd ModSecurity-master ./autogen.sh ./configure --enable-standalone-module And i got the following error : Checking plataform... Identified as Linux configure: looking for Apache module support via DSO through APXS configure: error: couldn't find APXS After installing httpd-devel httpd-devel and running ./configure --enable-standalone-module --with-apxs=/usr/sbin/apxs ; make modsecurity compile workes but still have another error of nginx compilation : ./configure --add-module=/usr/local/src/john/ModSecurity-master/nginx/modsecurity and i got this error : gcc -c -pipe -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g -I src/core -I src/event -I src/event/modules -I src/os/unix -I /usr/include/apache2 -I /usr/include/apr-1.0 -I /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone -I /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2 -I /usr/include/libxml2 -I objs -I src/http -I src/http/modules -I src/mail \ -o objs/addon/modsecurity/ngx_http_modsecurity.o \ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:20:23: error: http_core.h: No such file or directory /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:21:26: error: http_request.h: No such file or directory In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:37, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_logging.h:41:23: error: apr_pools.h: No such file or directory In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:38, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_multipart.h:26:25: error: apr_general.h: No such file or directory /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_multipart.h:27:24: error: apr_tables.h: No such file or directory In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:38, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_multipart.h:44: error: expected specifier-qualifier-list before ‘apr_array_header_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_multipart.h:65: error: expected specifier-qualifier-list before ‘apr_array_header_t’ cc1: warnings being treated as errors /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_multipart.h:135: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_multipart.h:135: error: type defaults to ‘int’ in declaration of ‘apr_status_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_multipart.h:135: error: expected ‘,’ or ‘;’ before ‘multipart_cleanup’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_multipart.h:137: error: expected declaration specifiers or ‘...’ before ‘apr_table_t’ In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:39, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_pcre.h:41: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_pcre.h:45: error: expected ‘)’ before ‘*’ token In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:40, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:19:27: error: apr_file_info.h: No such file or directory In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:41, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:29, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:40, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/persist_dbm.h:21: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/persist_dbm.h:21: error: type defaults to ‘int’ in declaration of ‘apr_table_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/persist_dbm.h:21: error: expected ‘,’ or ‘;’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/persist_dbm.h:24: error: expected declaration specifiers or ‘...’ before ‘apr_table_t’ In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:42, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:29, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:40, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:20:19: error: httpd.h: No such file or directory /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:21:24: error: ap_release.h: No such file or directory /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:24:26: error: apr_optional.h: No such file or directory In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:42, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:29, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:40, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:30: error: expected declaration specifiers or ‘...’ before ‘modsec_register_tfn’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:30: error: expected declaration specifiers or ‘...’ before ‘(’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:30: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:30: error: type defaults to ‘int’ in declaration of ‘APR_DECLARE_OPTIONAL_FN’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:31: error: expected declaration specifiers or ‘...’ before ‘modsec_register_operator’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:31: error: expected declaration specifiers or ‘...’ before ‘(’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:31: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:31: error: type defaults to ‘int’ in declaration of ‘APR_DECLARE_OPTIONAL_FN’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:32: error: expected declaration specifiers or ‘...’ before ‘modsec_register_variable’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:33: error: expected declaration specifiers or ‘...’ before ‘(’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:32: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:36: error: type defaults to ‘int’ in declaration of ‘APR_DECLARE_OPTIONAL_FN’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:37: error: expected declaration specifiers or ‘...’ before ‘modsec_register_reqbody_processor’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:37: error: expected declaration specifiers or ‘...’ before ‘(’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:37: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:37: error: type defaults to ‘int’ in declaration of ‘APR_DECLARE_OPTIONAL_FN’ In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:42, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:29, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:40, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:56: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:58: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:65: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:65: error: type defaults to ‘int’ in declaration of ‘apr_status_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:65: error: expected ‘,’ or ‘;’ before ‘input_filter’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:68: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:68: error: type defaults to ‘int’ in declaration of ‘apr_status_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:68: error: expected ‘,’ or ‘;’ before ‘output_filter’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:70: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:70: error: type defaults to ‘int’ in declaration of ‘apr_status_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:70: error: expected ‘,’ or ‘;’ before ‘read_request_body’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:77: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:77: error: type defaults to ‘int’ in declaration of ‘apr_status_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:77: error: expected ‘,’ or ‘;’ before ‘send_error_bucket’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:83: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:85: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:93: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/apache2.h:95: error: expected ‘)’ before ‘*’ token In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:29, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:40, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:43:25: error: http_config.h: No such file or directory In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:29, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:40, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:59: error: expected declaration specifiers or ‘...’ before ‘apr_array_header_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:61: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:61: error: type defaults to ‘int’ in declaration of ‘apr_status_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:61: error: expected ‘,’ or ‘;’ before ‘collection_original_setvar’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:63: error: expected declaration specifiers or ‘...’ before ‘apr_pool_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:67: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:70: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:75: error: expected declaration specifiers or ‘...’ before ‘apr_array_header_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:76: error: expected declaration specifiers or ‘...’ before ‘apr_pool_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:86: error: expected specifier-qualifier-list before ‘apr_pool_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:94: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:101: error: expected specifier-qualifier-list before ‘apr_pool_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:111: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:111: error: type defaults to ‘int’ in declaration of ‘apr_status_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:111: error: expected ‘,’ or ‘;’ before ‘msre_ruleset_process_phase’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:113: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:113: error: type defaults to ‘int’ in declaration of ‘apr_status_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:113: error: expected ‘,’ or ‘;’ before ‘msre_ruleset_process_phase_internal’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:115: error: expected declaration specifiers or ‘...’ before ‘apr_pool_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:143: error: expected specifier-qualifier-list before ‘apr_ipsubnet_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:149: error: expected specifier-qualifier-list before ‘apr_array_header_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:189: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:219: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:235: error: expected specifier-qualifier-list before ‘fn_tfn_execute_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:239: error: expected declaration specifiers or ‘...’ before ‘fn_tfn_execute_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:258: error: expected declaration specifiers or ‘...’ before ‘apr_table_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:258: error: expected declaration specifiers or ‘...’ before ‘apr_pool_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:285: error: expected specifier-qualifier-list before ‘apr_table_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:341: error: expected declaration specifiers or ‘...’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:341: error: type defaults to ‘int’ in declaration of ‘apr_status_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:341: error: ‘apr_status_t’ declared as function returning a function /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:341: error: ‘apr_status_t’ redeclared as different kind of symbol /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:113: note: previous declaration of ‘apr_status_t’ was here /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:342: error: expected declaration specifiers or ‘...’ before ‘apr_pool_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:342: error: ‘fn_action_execute_t’ declared as function returning a function /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:369: error: expected specifier-qualifier-list before ‘fn_action_init_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:399: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:403: error: expected declaration specifiers or ‘...’ before ‘apr_array_header_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:403: error: ‘msre_parse_vars’ declared as function returning a function /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/re.h:415: error: expected specifier-qualifier-list before ‘apr_size_t’ In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:40, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:54: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:62: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:66: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:68: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:70: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:74: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:76: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:82: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:88: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:90: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:92: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:100: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:102: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:104: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:106: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:108: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:110: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:112: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:114: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:128: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:132: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:136: error: expected ‘)’ before ‘*’ token /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:140: error: data definition has no type or storage class /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:140: error: type defaults to ‘int’ in declaration of ‘apr_fileperms_t’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:140: error: expected ‘,’ or ‘;’ before ‘mode2fileperms’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_util.h:144: error: expected declaration specifiers or ‘...’ before ‘apr_pool_t’ In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:41, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_xml.h:43: error: ‘xml_cleanup’ declared as function returning a function In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:42, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_geo.h:38:25: error: apr_file_io.h: No such file or directory In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:42, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_geo.h:58: error: expected specifier-qualifier-list before ‘apr_file_t’ In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:43, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_gsb.h:22:22: error: apr_hash.h: No such file or directory In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:43, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_gsb.h:25: error: expected specifier-qualifier-list before ‘apr_file_t’ In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:44, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_unicode.h:25: error: expected specifier-qualifier-list before ‘apr_file_t’ In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:46, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/msc_crypt.h:34: error: expected ‘)’ before ‘*’ token In file included from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../standalone/api.h:23, from /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:28: /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:48:23: error: ap_config.h: No such file or directory /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:49:21: error: apr_md5.h: No such file or directory /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:50:25: error: apr_strings.h: No such file or directory /usr/local/src/john/ModSecurity-master/nginx/modsecurity/../../apache2/modsecurity.h:54:22: error: http_log.h: No such file or directory /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:938: error: ‘ngx_http_modsecurity_ctx_t’ has no member named ‘req’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:938: error: too many arguments to function ‘ConvertNgxStringToUTF8’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:942: error: ‘ngx_http_modsecurity_ctx_t’ has no member named ‘req’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:944: error: ‘ngx_http_modsecurity_ctx_t’ has no member named ‘req’ /usr/local/src/john/ModSecurity-master/nginx/modsecurity/ngx_http_modsecurity.c:952: error: ‘modsecurity_read_body_cb’ undeclared (first use in this function) make[1]: *** [objs/addon/modsecurity/ngx_http_modsecurity.o] Error 1 make[1]: Leaving directory `/usr/local/src/john/nginx-1.2.5' make: *** [build] Error 2 Note : I'm using nginx as the only webserver and i do not have apache installed. OS : Centos 6 64bit How can i solve this problem And do you have another easy way to install modsecurity with nginx ?

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