|
1) don't put m_Luting in a _T() macro.
2) Since you're using MFC, use it all the way...
if (CreateDirectory(m_Luting))
{
CString sPath;
sPath.Format("%s\\%s%s", m_Luting, m_Name, stName);
CFile file;
CFileException e;
if (file.Open(sPath, CFile::modeCreate | CFile::modeWrite, &e)
{
#ifdef _DEBUG
afxDump << "File could not be opened " << e.m_cause << "\n";
#endif
return;
}
else
{
file.Close();
}
}
else
{
AfxMessageBox("Could not create folder.");
}
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
|
|
|
|
|
zhangguoliming wrote: Hey, I want to creat a new folder with a new file. Now my code can only creat a new folder but no file.What is the wrong with my code?Please help anyway you can.. Thanks in advance.
CDiskObject: Simplifying common disk operations[^]
|
|
|
|
|
You can also use of CreateFile for create or open a file
|
|
|
|
|
Hi,
Can I change executable name which my project will produce after compilation, based on some define in projects code.
For example can I have something like:
#define EXE_NAME "MyApp.exe"
such a way that after building the project I will actually get MyApp.exe file?
Using VS 2003, VC++
Thanks,
Mike
|
|
|
|
|
suggam wrote: Can I change executable name which my project will produce after compilation, based on some define in projects code.
I don't think so. The linker, not the compiler, determines the output file name.
Maybe this will work for your needs: OutputFile Property[^]
Mark
Great job, team. Head back to base for debriefing and cocktails.
|
|
|
|
|
Try coming up with a post-build step?
-or -
You could always create a custom configuration - instead of using "Win32 Debug", create a configuration called "Win32 MyName Debug". That way, you can assign whatever configuration properties you wanted, including what to call the resulting exe file.
I don't know if VS2003 allows you to specify custom configurations, but VS2005 does.
-- modified at 16:28 Wednesday 14th February, 2007
Can whoever voted this a 1 please explain why you felt the need to do so?
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
|
|
|
|
|
John Simmons / outlaw programmer wrote: I don't know if VS2003 allows you to specify custom configurations, but VS2005 does.
VS2003 does. "Build" - "Configuration Manager"
John Simmons / outlaw programmer wrote: Can whoever voted this a 1 please explain why you felt the need to do so?
At least I could bring you to 3.0 
Failure is not an option - it's built right in.
|
|
|
|
|
The thing is that builds should happen automatically, so I can not manually create separate build configurations for every executable name I need.
May be there is a way to automatically change project build property by means of some macros which will read the name from some file? Ideally it should parse one of the source files and find particular #define there with the name value to use.
Thanks for yuor answers.
Mike
|
|
|
|
|
I think you're going to have to export the make file and use the command line to build your project using the linker /OUT= parameter to specify the name of the executable file.
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
|
|
|
|
|
Ok, but even in that case I still need to extract that actual name from source file somehow.
So, right now I am thinking about just having some general name for output file after building. Also I will have POST_BUILD action in project settings where some small self-made application will start, it will parse certain source file looking for that #define, extract desired name, and rename resulting output file according to that extracted value.
That seams to be the most straight forward approach 
Thanks for your replys guys,
Mike
|
|
|
|
|
Some topics bellow, i discover a way to pass a pointer to a function etc. That whas great.
But the code is in a DLL, and must be called from a VB6 application.
That's the code:
#######################################
#include <windows.h>
struct tpteste
{
int i;
};
void __stdcall test( tpteste **l )
{
tpteste *t = new tpteste[4];
t[0].i = 99;
t[1].i = 98;
t[2].i = 97;
t[3].i = 96;
*l = t;
}
void __stdcall doNothing( void )
{
tpteste *w = NULL;
test(&w);
}
#######################################
I need to discover how to call the test function from VB.
If someone can help... thanks in advance.
|
|
|
|
|
Sorry about the tags.
And about the place to ask, i had a problem: i looked at the "Message Boards" menu at the top right of the screen and couldn't find a VB6 forum, only VB.NET. But after i looked better and found a VB / VB.NET forum, and posted it there. So, sorry about that too. I'm a newbie here.
If anyone can answer i'd be glad to know, and in the future i will be more careful.
Thanks.
|
|
|
|
|
I have a CMap that does a mapping between <cstring ,="" cmyobj="" *="">
This map is populated by reading a file ( line by line ) and CMyObj is constructed from information in that line .
So the logic is something like
Map<string, cmyobj="" *=""> map ;
while eof
{
line = readline
string key = line.FirstToken
CMyObj *p= new CMyObj(line)
map[key] = p ;
}
Now I am modifying where p is going to be allocated from Virtual memory instead of heap
Unfortunately i will need to be able to reconstruct this object based on address
Hence when i do the lookup the map will only give me the address but the size is not available as
is there a mechanism that I can use to decide the size and transparently recreate the object from virtual memory ?
Engineering is the effort !
|
|
|
|
|
act_x wrote: Now I am modifying where p is going to be allocated from Virtual memory instead of heap
I don't understand why or what you want to do ?
|
|
|
|
|
act_x wrote: Now I am modifying where p is going to be allocated from Virtual memory instead of heap
and i'd be curious to know how you do that
|
|
|
|
|
All memory in user mode programs is virtualised. The heap is in virtual memory. The heap is build on top of virtual memory. You can only allocate virtual memory in 4k chunks (on x86 platforms): the heap is a data structure to minimise the waste by carving up a virtual memory chunk into pieces to serve requests smaller then the page size.
Steve
|
|
|
|
|
hi
i've an application that installs some files to application folder in program files.a user with limited rights are not able to access that files. but every user wants thats files for modification. it was working properly in xp as program files is not restricted to the administrator. but in vista program file is a restricted area.how can i solve this problem.
thanx in advance
|
|
|
|
|
is this a programming question related to VC++ ?
otherwise if you need some administration, ask the Operating System or Vista Forums...
|
|
|
|
|
I would redesign the way your application set up files.
if this is a single user application, and the "files" are will only be used and modified by one user ( and not shared betweeen other users) use the APPDATA folder ( Document And Settings\<user>\Application Data\ ... )
|
|
|
|
|
The answer is simple but you probably won't like it: Don't write to Program Files. You have a design flaw in the app which has been ignored (or at least was not evident) until now.
|
|
|
|
|
Consider the following code :
vector<int> *testVector = new vector<int>();
testVector->push_back(1);
int &testRef = (*testVector)[0];
cout << testRef << endl;
testVector->clear();
delete testVector;
cout << testRef << endl;
How can i detect that the reference has become invalid ?
|
|
|
|
|
best practices teach to NULL a pointer you just delete...
delete testVector;
testVector = NULL;
what i suspect you was to expecting the last cout to print 0x00000000.
but delete frees the memory pointed to by the pointer, nothing much.
|
|
|
|
|
That is not the problem. I don't even reference the pointer. I reference an element of the vector that has been destroyed. I could leave the delete on the vector and it would still print nonsense. The reference to the integer stored in the vector has become invalid. I have this problem because i need to implement a wrapper for a map on wich multiple threads can operate concurrently, inserting, reading and deleting. Now one thread could delete an element another thread is currently working on. Since the objects are managed by the map itself i cannot find out when that happened.
|
|
|
|
|
what do you mean by "print non-sense" ? what do you expect ?
[edit]
oh, my bad, i read your post incorrectly (i read that you were printing out the address in the testVector pointer).
AFAIK, a reference cannot be changed of address, so by clearing the vector, then deleting it, you invalidate the reference. the only way you have to know the reference may be invalid is not writing such code.
i don't think we can know otherwise
BTW, it seems that you need some synchronizing code around your vector... one should not read it until another thread finished to modify it, and such references being temporary shouldn't be stored
[/edit]
|
|
|
|
|
Synchronization is of course neccessary (bad seplling ?!), but i want to keep it minimal, since too much synchronization can make a multithreaded application almost sequential, this voiding the advantage of multithreading.
It is also correct that the reference should not be stored, but experience tells us, that users always do whatever it takes to crash a program, or the library in that case. So i try to keep my code bulletproof.
My approach now is to write a wrapper-class that behaves like a reference, but checks on every access weather the elemennt/vector actually still exists. I'm not sure though if that is the smartest way to do it, it seems like a waste of resources.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
