I am working on a performance critical multi-threaded application. I looked at rlog, Ace and Boost logging. I chose rlog because I read it was the fastest (when logging is disabled, it has the least overhead). The problem I have is it shows the file name, line number etc. even in release mode. If you can tell me how to shut that informa...
I'm using boost for several C++ projects. I recently made a upgrade (1.33.1 to 1.36, soon to 1.37), since then I cannot run any debug-builds anymore. To be sure that no other project issues remain, I've created a minimum test-project, which only includes boost.thread, and uses it to start one method. The release build can be started, ...
How do I get an old VC++ 6.0 MFC program to read and display UTF8 in a TextBox or MessageBox? Preferably without breaking any of the file reading and displaying that is currently written in there (fairly substantial). I read a line into CString strStr, then used this code: int nLengthNeeded = MultiByteToWideChar(CP_UTF8,0,strStr,1024,...
Background: I have an application written in native C++ which uses the wxWidgets toolkit's wxODBC database access library which is being removed from all future versions of wxWidgets . I need to replace this with another database access method that supports the assumptions and contraints outlined below. I don't require that the replacem...
I'd like to create a random string, consisting of alpha-numeric characters. I want to be able to be specify the length of the string. How do I do this in C++? ...
Is there some way to make c++ dlls built with diffrent compilers compatible with each other? The classes can have factory methods for creation and destruction, so each compiler can use its own new/delete (since diffrent runtimes have there own heaps). I tried the following code but it crashed on the first member method: interface.h #p...
Following code, when compiled and run with g++, prints '1' twice, whereas I expect '1' to be printed only once, since I am dumping a single structure to the file, but while reading back it seems to be reading two structures. Why? #include <iostream.h> #include <fstream.h> int main(){ struct student { int rollNo; }; ...
Would like to create a strong password in C++. Any suggestions? I assume it should use alpha (upper and lower), numeric, special characters. It would be good to be able to specify a minimum length. It would be great to avoid characters that are hard to visually distinguish like "O" and "O" It would be great to void all characters same,...
I am writing a C++ COM object in Visual Studio 2008 that is an Internet Explorer Browser Helper Object. Recently, when running in IE, IE has started frequently popping up a dialog titled "Microsoft Visual C++ Runtime Library" with an error message "Runtime Error!" and going on to say that "The application has requested the Runtime to ter...
I was trying to build Boost C++ Libraries for last two hours and stopped without any result. Since I am new to C++, I am unable to get the build right. How can I build it correctly using Visual Studio 2008? I need to use the BCP tool to extract a subset of library. So I need to build BCP first, right? How to do this? When I tried to bui...
If my understanding is correct, they do exactly the same thing. Why would anyone use for the "for" variant? Is it just taste? Edit: I suppose I was also thinking of for (;;). ...
Has any been able to successfully run with a client using the WSO2/C++ web services package? I've tried just about everything I can think of yet every time I try to run a very simple client I get a crash. Here's some sample code from one of their example programs... #include <stdio.h> #include <WSRESTClient.h> #include <OMElement.h> #...
I have a class that i want to push_back into a deque. The problem is when i push back i need the original object to be changed thus i need a non const copy ctor. Now if i implement that my const copy ctor gets called. If i removed the const ctor i get an compile error about no available ctors. How do i implement this in a way that i can ...
I heard there is a light implementation of boost where its only smart pointers and a few other very basic stuff. I think i heard it doesnt use any OS functions either. I tried searching for it but found nothing. Does anyone know what it is called or an implementation of boost styled smart pointers that doesnt require OS calls? ...
I am trying to use Qt for a project in school but am running into problems. I started following the tutorials and I am running into Makefile problems. Most of the tutorials say to run qmake -project, then qmake and finally make. But when I try this I run into the error make: *** No targets specified and no makefile found. Stop. I dont k...
In general, what is the best way of storing binary data in C++? The options, as far as I can tell, pretty much boil down to using strings or vector<char>s. (I'll omit the possibility of char*s and malloc()s since I'm referring specifically to C++). Usually I just use a string, however I'm not sure if there are overheads I'm missing, or ...
in my code i would like boost::shared_ptr not to call delete but call ptr->deleteMe() instead. Also i have a few C styled functions that return a ptr. Can i make it call lib_freeXYZ(ptr); instead of trying to delete? ...
Well, I've been given an assignment to basically figure out how memory allocation works for whatever language I'll be using. After some research, I have some questions and doubts which I'd like to get some insight in. For example: I read here that Java specifies exactly how the stack contents are organized. Looking at the JVM spec struc...
Suggestions for command-line argument processing in C++ efficiently: Note: Windows specific only 1: #include <iostream.h> 2: int main(int argc, char **argv) Instead of, for example: if ( argc != 3 ) { .... } Regards ...
On this question, there's an answer that states: You can use typedef to make Colour enumeration type accessible without specifying it's "full name". typedef Sample::Colour Colour; Colour c = Colour::BLUE; That sounds correct to me, but someone down-voted it and left this comment: Using the scope resolution operator :: on enum...