In most of the example I had seen, time_zone_ptr zone( new posix_time_zone("MST-07") ); But, I just want to get the current time zone for my running machine. I do not want to hard code the time zone name. May I know how can I do so in boost? ...
Hello, I developed a scripting engine that has many builtin functions, so far to call any function code just went into a if .. else if .. else if wall checking the name but I would like to develop a more efficient solution. Shoul I use a hashmap with strings as keys and pointers as values. How could I do it by using an STL map? EDIT: ...
Is there a quick way to hook a dll in c++? I know there is Microsoft's Detours thing, but isn't there a quick a simple way just to hook a few dll functions? For example I want to hook a the function void mytestfunction() in the dll mytestdll.dll to hook_mytestfunction(). thanks in advance! ...
OK, I am trying to get a sub array from an existing array and I'm just not sure how to do it. In my example I have a very large array, but I want to create an array from the last 5 elements of the array. An example of what I am talking about would be: int array1 = {1,2,3,...99,100}; int array2[5] = array1+95; I know this isn't correc...
#include <vector> struct A {int a;}; struct B : public A {char b;}; int main() { B b; typedef std::pair<A*, A*> MyPair; std::vector<MyPair> v; v.push_back(std::make_pair(&b, &b)); //compiler error should be here(pair<B*,B*>) return 0; } I don't understand why this compiles (, maybe somebody may kindly provide detailed expla...
I'm trying to use boost unit testing alongside the Allegro graphics library, but both require main() alterations / overwrites. Has anyone had any experience using both? Edit 1/29/2010: I've refrained from selecting an answer until I can verify one or another, and due to the... sparse nature of the answers. ...
There is a article in MSDN which provides the procedure: http://msdn.microsoft.com/en-us/library/aa295838(VS.60).aspx#_core_setting_a_breakpoint_when_a_register_expression_is_true But it seems that i tis for visual studio 6 ... Actually I can not find the "Breakpoint" entry under "Edit" Menu... Do you guys know how to do that? I want t...
If a header file contains a function definition it can be inlined by the compiler. If the function is exported, the function's name and implementation must also be made available to clients during linkage. How does a compiler achieve this? Does it both inline the function and provide an implementation for external callers? Consider Foo....
Sample eg: messageStruct.hpp class MessageStructure_t{ public: struct MsgData_t { float a; int i; }__attribute__((packed))msgdata_m; };//classs end I have a file in my project Application.c. I need to access the structure variables here. Both are different, one .hpp and the other .c How can I do this ? Hoping your kind ...
I'm the lead dev for Bitfighter, and am having problems porting the game to 64-bit Linux. This should be a relatively easy and common problem, but it has stumped a number of people and I have been able to find no good information about it. [[ The code compiles in 32-bit with gcc version 4.1.2, and others, and fails with several variant...
I want to trap WM_SETFOCUS messages on all the current windows. Whats the best way to do that. I think SetWidnwosHookEx can be used to for this purpose. Can it be used with WH_CALLWNDPROC or WH_MSGFILTER ? Also its mentioned that hook procedure must be in separate dll. Is it required. Can I not have hook procedure in same dll which ins...
Recently I've been writing code similar to this: messagehandler.h: #include "message.h" class MessageHandler { public: virtual ~MessageHandler() {} virtual void HandleMessage(Message *msg) = 0: }; persistmessagehandler.h: MessageHandler *CreatePersistMessageHandler(); persistmessagehandler.cpp: #include "messagehandler.h" #...
My String class provides an operator char* overload to allow you to pass the string to C functions. Unfortunately a colleague of mine just inadvertently discovered a bug. He effectively had the following code. StringT str; // Some code. delete str; Is there anyway to prevent delete from casting the string object to a char* to prev...
I have to map a set of known integers to another set of known integers, 1-to-1 relationship, all predefined and so on. So, suppose I have something like this (c++, simplified, but you'll get the idea): struct s { int a; int b; }; s theMap[] = { {2, 5}, {79, 12958 } }; Now given an input integer, say 79, I'd need to find the correspon...
Hi there, When I include "Python.h" from Python 2.5 in a C++ project, it knows through some magical process that it has to link with "python25.lib" and load "python25.dll" at runtime, though I didn't specified anything neither in "Linker -> Additional Dependencies" nor in "Linker -> Additional Library Directories". Now I would like to ...
I was looking at some example C++ code for a hardware interface I'm working with and noticed a lot of statements along the following lines: if ( NULL == pMsg ) return rv; I'm sure I've heard people say that putting the constant first is a good idea, but why is that? Is it just so that if you have a large statement you can quickly see ...
Is there a waymuch like viewing the result of preprocessing with gcc -Eto see what my objects look like once compiled into object files? I am talking about GCC, but a solution including MSVC would be fine. ...
I'm trying to draw some bitmap on a CImage object using GDI+ DrawImage. The resulting CImage bitmap seems to be premultiplied by alpha but I can't find any mention of that in the msdn documentation. What happens when I draw using DrawImage over an CImage HDC ? ...
Hi, Firstly I'm an engineer, not a computer scientist, so please be gentle. I currently have a C++ program which uses MySQL++. The program also incorporates the NI Visa runtime. One of the interrupt handlers receives data (1 byte) from a USB device about 200 times a second. I would like to store this data with a time stamp on each sample...
Hi, I am using two classes in my C++ application. The code is as follows: class MyMessageBox { public: void sendMessage(Message *msg, User *recvr); Message receiveMessage(); list<Message> dataMessageList; }; class User { public: MyMessageBox *dataMsgBox; }; The msg is a pointer to a derived class object of Message cl...