In C++ Builder, how can I make sure that even correctly nested code like: void func () { ... .. ) C++ Builder correctly nested only doing so: void func () { ... ... } This is very stressful, because I always have to correct by hand. So how can I make which indents code as well in the first instance? ...
I've got some bar code scanner devices that can handle a variety of USB interfaces (COMM Emulation, HID Keyboard, HID POS, etc.) The problem is that, while I can tell if the device is in a HID mode, I need to be able to determine if it's HID Keyboard or HID POS. Is there a way to determine this using Win32 C++, preferably with the buil...
Hello I have been using LibTomCrypt to use SHA1 encryption ( for data integrity checking ) on mobile devices (iPhone OS and Android for the moment ). I was wondering if anyone is using anything else, things to consider are Portability ( C preferred but C++ is also an option ), and libraries size ( small == better for my particular needs ...
I've noticed on a number of occasions when refactoring various pieces of C and C++ code that a comma is used rather than a semi-colon to seperate statements. Something like this; int a = 0, b = 0; a = 5, b = 5; Where I would have expected int a = 0, b = 0; a = 5; b = 5; I know that C and C++ allow use of commas to seperate statem...
I have created a class which includes a linked list and this class needs to have a destructor for deleting the linked list, which I have included however because the delete method itself calls the destructor I end up in an infinite recursive call situaction. Here is the code:- PolynomialNode::~PolynomialNode() { /*PolynomialNode* c...
Hi: I already read the FAQ, and i think maybe this is a subjective question, but i need to ask. Does anyine knows what exactly (i mean formally) is a C++ language extensions. I already saw examples, like nvdia CUDA c ext, Avalon transaction-based c++ ext. So the point is something like a formal definition or so. thxs anyway. ...
I'm developing a project and I have to make a wrapper to some hardware functions. We have to write and read data to and from a non-volatile memory. I have a library with the read and write functions from the seller company. The problem is that these functions should be called with a delay between each call due to hardware characteristic...
I have some question about cygwin : Can I use Cygwin develop socket based code? Does Cygwin have read() and write() functions that work with file descriptors? Can I use Pthread library in Cygwin? Does code that compiles in Cygwin also compile in Linux without any change or with little change? Will an executable file that built by Cyg...
Hi, I had a segmentation fault when using my new Qt Widget with Qt Designer 4.6. The problem arise when trying to preview the new widget. when using gdb I found that the problem is in qdesigner_internal::WidgetFactory::applyStyleToTopLevel: Program received signal SIGSEGV, Segmentation fault. qdesigner_internal::WidgetFactory::apply...
I would like to know what the cons are of using the preprocessor in such a way: #define SOME_FUNCTION someFunction(someArgument) Basically I feel like this is wrong (or certainly not a best practice) - but I'm not sure why... my preprocessor skills are rusty at best. thanks, A ...
What's the most elegant way to return a std::list object from a shared lib function (implemented by C++ code) to a C consumer? I know for std::vector, we can return the address of the 1st element of the vector and have the consumer treat it as an array, but std::list is implemented as a linked lis. ...
I had a HashMap<Node, Double> in Java which I'd use later on to retrieve the double associated with a node. I've tried to do boost::unordered_map<Node*, double> but I get a "error C2108: subscript is not of integral type" when I try to put something in it, like: map[some_node] = some_double; If I interpreted the error right,...
In the C++ code below, am I guaranteed that the ~obj() destructor will be called after the // More code executes? Or is the compiler allowed to destruct the obj object earlier if it detects that it's not used? { SomeObject obj; ... // More code } I'd like to use this technique to save me having to remember to reset a flag at the e...
I'm using pseudo-interfaces in C++, that is, pure abstract classes. Suppose I have three interfaces, IFoo, IBar and IQuux. I also have a class Fred that implements all three of them: interface IFoo { void foo (void); } interface IBar { void bar (void); } interface IQuux { void quux (void); } class Fred : implements ...
we work under Linux/Eclipse/C++ using Eclipse's "native" C++ projects (.cproject). the system comprises from several C++ projects all kept under svn version control, using integrated subclipse plugin. we want to have a script that would checkout, compile and package the system, without us needing to drive this process manually from ecl...
I'm using Visual Studio 2008 to build a Solution with two Projects: a C# Console App and a C++ DLL. I want the app to call a function from the dll using P/Invoke. Therefore I'm trying to add the dll as a Reference to the C# app. But when I try the Add Reference command, Visual Studio won't let me do it unless I set the /clr property on t...
I am trying to figure out where my C++ program is spending its time, using gprof. Here's my dilemma: if I compile with the same optimization settings I use for my release build, pretty much everything gets inlined, and gprof tells me, unhelpfully, that 90% of my time is spent in a core routine, where everything was inlined. On the oth...
Hi! I want to write a library (C\C++) which would be able to monitor network traffic (TCP and UDP) as well as limit bandwidth to a particular network area (apply different traffic shaping rules to different network zones). This library should work on Windows 7 (64-bit). I would be glad if this kind of library can be written as entirely u...
In our vc++ win32 application we are reading a registry value of type reg_multi_sz, its working fine on 32-bit but giving empty buffer when i ran on 64- bit. How can I read values of 64 bit registry from my 32-bit application ? ...
How does the following code work in C++? Is it logical? const int &ref = 9; const int &another_ref = ref + 6; Why does C++ allow literal initialization for const references when the same is not permitted for non-const references? E.g.: const int days_of_week = 7; int &dof = days_of_week; //error: non const reference to a const objec...