Hey! I'm trying out gtest for C++ (Google's unit testing framework), and I've created a ::testing::Environment subclass to initialize and keep track of some things that I need for most of my tests (and don't want to setup more than once). My question is: How do I actually access the contents of the Environment object? I guess I could th...
Is there a way by which we can simulate thread level constants in C++? For example, if i have to make a call to template functions, then i need to mention the constants as template level parameters? I can use static const variables for template metaprogramming, but they are process level constants. I know, i am asking a question with a...
I am calculating intersection, union and differences of sets. I have a typedef of my set type: typedef set<node_type> node_set; When it is replaced with typedef hash_set<node_type> node_set; The results are different. It's a complicated program, and before I start debugging - am I doing it right? When I use functions like this: s...
As I'm coding for both Windows and Linux, I have a whole host of problems. Microsoft Visual C++ has no stdint header, but for that I wrote my own. Now I found out that MS C++'s new operator does not throw an exception, so I want to fix this a quickly as possible. I know I can define a Macro with Parameters in Parenthesis, can I define a...
The first thing that comes to my mind is to do a bunch of \t's, but that would cause words to be misaligned if any word is longer than any other word by a few characters. For example, I would like to have something like: Name Last Name Middle initial Bob Jones M Joe ReallyLongLastName T Instead,...
I'm trying to detect "Use after free()" bugs, otherwise known as "Dangling pointers". I know Valgrind can be used to detect "Use after free" bugs on the *nix platform, but what about windows? What if I don't have the source? Is there a better program than Valgrind for detecting all dangling pointers in a program? A free and open...
I have a C++ class like this: class ConnectionBase { public: ConnectionBase(); template <class T> Publish(const T&); private: virtual void OnEvent(const Overload_a&) {} virtual void OnEvent(const Overload_b&) {} }; My templates & overloads are a known fixed set of types at compile time. The application code derives f...
I am trying to add drag-and-drop text to my Doc-View App. I added the COleDropTarget variable to the view class, registered it in OnCreate(). I added OnDragEnter(), OnDragOver(), OnDragLeave() and OnDrop() to that class as virtual overrides, but none of them are ever called. I previously had added m_pMainWnd->DragAcceptFiles(TRUE); to my...
class Base { public: int base_int; }; class Derived : public Base { public: int derived_int }; Base* basepointer = new Derived(); basepointer-> //Access derived_int here, is it possible? If so, then how? ...
This is heavily simplified for the sake of the question. Say I have a hierarchy: struct Base { virtual int precision() const = 0; }; template<int Precision> struct Derived : public Base { typedef Traits<Precision>::Type Type; Derived(Type data) : value(data) {} virtual int precision() const { return Precision; } ...
Hi, I've downloaded the dll's for ImageMagick and am wondering if anybody knows of some example code to accomplish a simple task: I have generated an image in C++ and have the buffer in RGB format. I need to convert it to PDF format (without writing to a file) before sending it over a TCP socket. Is this doable with ImageMagick (or any...
After getting a helpful answer here, I have run into yet another problem: displaying two or more strings in the column I want it to be displayed in. For an example of the problem I have, I want this output: Come here! where? not here! but instead get Come here! where? not here! when I use the code c...
I'm pulling my hair due to the following problem: I am following the example given in boost.interprocess documentation to instantiate a fixed-size ring buffer buffer class that I wrote in shared memory. The skeleton constructor for my class is: template<typename ItemType, class Allocator > SharedMemoryBuffer<ItemType, Allocator>::Shared...
What I am trying to create is a rocket that will hug the track in a straight direction. ie) The rocket travels in a straight direction and can orientate based on its local x axis. This is so it can go up/down ramps and never hit the ground. Currently I am using PhysX opengl and C++. This is the method I'm trying right now: 1. Ray cast ...
Hi, How would you locate an object in memory, lets say that you have a struct defined as: struct POINT { int x; int y; }; How would I scan the memory region of my app to find instances of this struct so that I can read them out? Thanks R. ...
I have a stl::list containing Widget class objects. They need to be sorted according to two members in the Widget class. For the sorting to work, a less-than comparator comparing two Widget objects must be defined. There seems to be a myriad of ways to do it. From what I can gather, one can either: a. Define a comparison operator overl...
I was recently fighting some problems trying to compile an open source library on my Mac that depended on another library and got some errors about incompatible library architectures. Can somebody explain the concept behind compiling a C program for a specific architecture? I have seen the -arch compiler flag before and have seen values ...
They're both resizable arrays, and std::basic_string doesn't have any specifically character-related functions like upper(). What's special about string to make it better for character data? ...
I have a Winodws Mobile 6.1 application running on an ARMV4I processor. Given a stack address (from unwinding an exception), I like to determine what module owns that address. Using the ToolHelpAPI, I'm able to determine most modules using the following method: HANDLE snapshot = ::CreateToolhelp32Snapshot( TH32CS_SNAPMODULE | TH32CS_GE...
I need someone to debug the lines of c++ code I wrote below so it can run. It is intended to spell check the word "and" using state to state transition. #include<iostream> #include<string> using namespace std; string in_str; int n; void spell_check() { int i; FILE *in_file; while (!EOF(in_file)) { fsca...