Hi, I'm working on a C++ project using LLVM and I'd like to replace the LLVM build system (which uses autoconf and make) with scons. Unfortunately I've now run into a major problem. I want my project to compile on Linux as well as Windows. To compile on Windows I use mingw/msys which works perfectly with the autoconf/make system in plac...
Being perfectly satisfied with old-style Makefiles, I am looking for a simple alternative to libtool. I do not want to switch to automake, and I keep running into problems with libtool when I try to use it directly. The latest one is 'unsupported hardcode properties', and I am getting fed up with the lack of complete documentation that j...
I've looked at binary reading and writing objects in c++ but are having some problems. It "works" but in addidion i get a huge output of errors/"info". What i've done is Person p2; std::fstream file; file.open( filename.c_str(), std::ios::in | std::ios::out | std::ios::binary ); file.seekg(0, std::ios::beg ); file.read ( (char*)&p2, s...
Hello, I'm trying to learn about condition variables and how to use it in a producer-consumer situation. I have a queue where one thread pushes numbers into the queue while another thread popping numbers from the queue. I want to use the condition variable to signal the consuming thread when there is some data placed by the producing th...
In a C++ function like this: int& getNumber(); what does the & mean? Is it different from: int getNumber(); ...
Hi, I'm writing an app where I need to simulate key press events on a mac, given a code that represents each key. It seems I need to use the CGEventCreateKeyboardEvent function to create the event. The problem is that this function needs a mac keycode, and what I have is a code that represents the specific key. So, for example, I reciev...
I am running simulation code that is largely bound by CPU speed. I am not interested in pushing data in/out to a user interface, simply saving it to disk as it is computed. What would be the fastest solution that would reduce overhead? iostreams? printf? I have previously read that printf is faster. Will this depend on my code and i...
Is it worth to write code like the following to copy array elements: #include <iostream> using namespace std; template<int START, int N> struct Repeat { static void copy (int * x, int * y) { x[START+N-1] = y[START+N-1]; Repeat<START, N-1>::copy(x,y); } }; template<int START> struct Repeat<START, 0> { static void copy ...
I'm currently working on a large and old C++ application that has had many developers before me. There is a lot of "dead code" in the project, classes and functions that aren't used by anyone anymore. What tools are available for C++ to make a analysis of large code base to detect and refactor dead code? Note: I'm not talking about tes...
I came across the following weird chunk of code.Imagine you have the following typedef: typedef int (*MyFunctionPointer)(int param_1, int param_2); And then , in a function , we are trying to run a function from a DLL in the following way: LPCWSTR DllFileName; //Path to the dll stored here LPCSTR _FunctionName; // (mangled) name...
What language/framework is best worth learning for mobile application development? My specific situation is that I'm very familiar with Java and C++ (I especially love Qt), but have limited experience with other languages. Some options I'm considering: 1) Learn Objective-C and all the iPhone-specific tools I do have access to a mac. Th...
Simply put: What is the most effective way to share / reuse code between iPhone and Android builds? The two most common scenarios I think would be: Blank slate new project, knowing ahead of time there is a large chunk of reusable logic that needs to run on each device. Existing iPhone code base, porting of C, C++ and Objective-C to th...
Hi, I've got wide string and I'm writing it to a wofstream that I opened in out|binary mode. When I look in the resultant file, it's missing every other byte. I was expecting that when I opened the file in visual studio with the binary editor that I'd see every other byte as a zero, but I'm not seeing the zeros. Do you know what I'm m...
I'm wrapping files with Visual C++ 2008, I've figured out how to embed them but I can't figure out how to retrieve them. I have some C++ experience, but none with Win32 or Visual C++. The goal of the wrapping is to run some code, and then if everything okay it can run the embedded file. I'm wrapping many different files, so code reuse...
I'm trying to get a read on the effort level involved in building a barebones virtual instrument host in C++ or C# but I haven't been able to get any hard information. Does anybody know any good starter apps, tutorials, helper libraries for this sort of thing? If it matters, the goal would be to a) accept incoming MIDI events and b) dis...
class MyClass { public: void method2() { static int i; ... } }; Will every instance of MyClass share one value i, or will each instance have its own copy? ...
I know that static const int x = 42; at namespace scope is equivalent to const int x = 42; because const variables are implicitly static (they must be declared extern to be given external linkage). Every translation unit that includes this declaration gets a local copy of x. Does this only apply to certain (perhaps integer?) types? I ...
Are there any efficient bitwise operations I can do to get the number of set bits that an integer ends with? For example 1110 = 10112 would be two trailing 1 bits. 810 = 10002 would be 0 trailing 1 bits. Is there a better algorithm for this than a linear search? I'm implementing a randomized skip list and using random numbers to determi...
This is just a quick question to understand correctly what happens when you create a class with a constructor like this: class A { public: A() {} }; I know that no default constructor is generated since it is already defined but are copy and assignment constructors generated by the compiler or in other words do i need to declar...
If I have for example a class with instance method and variables class Foo { ... int x; int bar() { return x++; } }; Is the behavior of returning a post-incremented variable defined? ...