Hello everyone, Anything wrong with my code below? I got the compile error! typedef unsigned char BYTE; void foo(char* & p) { return; } int main() { BYTE * buffer; // error C2664: 'foo' : cannot convert parameter 1 from 'char *' to 'char *&' foo ((char*)buffer); return 0; } Thanks in advance, George ...
I have something like the following, and after populating it with a arbitrary number of bits, I need to get the bytes to write out to a file. I don't see a way to do this and it seems useful, so I must be missing something. Any idea's? std::vector<bool> a; a.push_back(true); a.push_back(false); a.push_back(false); a.push_back(true); a...
I'm trying to write an encrpytion using the OTP method. In keeping with the security theories I need the plain text documents to be stored only in memory and never ever written to a physical drive. The tmpnam command appears to be what I need, but from what I can see it saves the file on the disk and not the RAM. Using C++ is there any ...
I'm aspiring to work in real-time 3D graphics. I work almost exclusively in C++, with a healthy smattering of win32. Realistically, do I have any sane alternatives? ...
I'm trying to read data in from a binary file and then store in a data structure for later use. The issue is I don't want to have to identify exactly what type it is when I'm just reading it in and storing it. I just want to store the information regarding what type of data it is and how much data of this certain type there is (informati...
The application I work uses XML for save/restore purposes. Here's an example snippet: <?xml version="1.0" standalone="yes"?> <itemSet> <item handle="2" attribute1="30" attribute2="blah"></item> <item handle="5" attribute1="27" attribute2="blahblah"></item> </itemSet> I want to be able to efficiently pre-process the XML which I read i...
Hi guys, I have a C# class library that contains methods that need to be used with an external application. Unfortunately this external application only supports external APIs in C/C++. Suppose I have a takeIntReturnDoubleArray method in this C# library that takes an integer and returns an array of doubles. All I need to do is have a...
I've scanned over the (outdated) article that is the first hit on google about ARM cross-compiling. I've also seen the article about compiling OpenCV to the iPhone and the general cross compiling instructions there. My question is can I call the apparently already configured gcc/g++ in the iPhone developer package (which I already have i...
That's something I've been wondering for a while now. Take Notepad++ for instace. Wikipedia tells me it was written in C++ and it's Windows-only. Now take PHP. Wikipedia tells me this is also written in C++, but that runs on other OS too. But I see more languages then just C++ for PHP... how is this done? Do they make some new code in...
I have a function which takes a reference to an object- void move(Ball& ball); I have another function calling 'move()' which has a pointer to ball - void foo(Ball* ball){ //call move() } How is foo() supposed to pass ball to 'move()'? Should it be like - move(*ball); or move(ball); or move(&ball); ...
I'm looking for some random crashes in an old c++ application. Using sysinternals process explorer, I noticed the app losing handles, and extracted the exact situation, where the program is losing handles to a very short piece of code. DWORD WINAPI MyTestThread( void* PThread) { _endthreadex(0); return 0; } int WINAPI WinMain( HINST...
Hi I am working on a directed graph (actually a bidirectional one) with Boost.Graph. I'd like to use the layout algorithms that exist (either Kamada-Kawai or Fruchterman-Reingold) but they only accept undirected graphs as parameters. What is the simplest way to use these layout algorithms ? More generally, what's the right way to lure ...
My app can switch between Serial and Socket connections, but neither can be open at the same time. So when I try to switch between a Socket to Serial, I delete the Socket connection. The socket based object uses a private class called UsesWinsock (a big shout out to Len Holgate here as it is basically his code (it is RAII actually but I...
I'm building a C++ Linux application and I need to log its activity. What are the existing Linux facilities to create logs? What would you recommend? ...
Bleh; Knowing how to ask the question is always the hardest so I explain a little more. I'm using CAxWindow to create an IE window internally and passing in the URL via the string class argument: CAxWindow wnd; m_hwndWebBrowser = wnd.Create(m_hWnd, rect, m_URI, WS_CHILD|WS_DISABLED, 0); It's part of an automated utility for anyone to...
Hello, is it possible to read data from a generic webcam in C++ as you would from a stream object? Is there a common API or standard that works with all webcams? I'm talking about C++ in *nix environment. Thanks in advance. ...
Hello, I want to disable exceptions in my C++ aplication, compiled under MSVC. I hve switched the option Enable C++ exceptions to NO, but I get warnings telling me to use the option /Ehsc, which I dont want to. I do not have try/catch blocks in my code, but I use STL. I have found that using macro definition _HAS_EXCEPTIONS=0 should...
Can anyone suggest any open and free library for logging on Windows Mobile application written in C++? It would be nice if it supports logging to files, syslog (would be nice) and logging level. ...
Can I have nested try-catch blocks? For example: void f() { try { //Some code try { //Some code } catch(ExceptionA a) { //Some specific exception handling } //Some code } catch(...) { //Some exception handling } }/...
I am looking for the definition of when I am allowed to do forward declaration of a class in another class's header file: Am I allowed to do it for a base class, for a class held as a member, for a class passed to member function by reference, etc. Thank you. ...