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When i'm feeling masochistic, i'll wrap just my CPP code with:
#pragma warning(push,4)
and
#pragma warning(pop)
Anything in-between those lines will be compiled with warning level 4, everything else at the default warning level.
--------
Higher education helps your earning capacity. Ask any college professor. --Shog9 --
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Do you need the pop? Will the pragma carry over to the next cpp module?
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Anonymous wrote:
Do you need the pop? Will the pragma carry over to the next cpp module?
No, but if you don't include the whole file, then it's useful; I'll usually not write new code initially at level 4, instead i'll compile w/ level 4 as a final step (along with documentation  ).
--------
Higher education helps your earning capacity. Ask any college professor. --Shog9 --
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In order to only have to do it once, do something like this in your StdAfx.h (you are, of course, using PCH correctly...?):
<br />
#pragma warning( push, 1 )<br />
#include <vector><br />
#include <deque><br />
#include <...whatever...><br />
#pragma warning( pop )<br />
That will force the preprocessor & compiler into Warning Level 1 only for the processing of the specified #includes, which should nail most of the warnings.
Peace!
-=- James.
"Fat people are hard to kidnap."
(Try Check Favorites Sometime!)
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I am working with C++ and MSAccess trough ODBC and I have a ligistics nightmare when it comes to releasing new versions of my databases. Right now, If I make a change to my database structure I have to write a little patch program that will add, remove, or edit columns or tables in the database and these things are hardcoded and can only work for specific versions.
I was wondering if anyone knows of any utility programs that will let me make the changes over multiple versions. Basically, if the user has version 1.0 and wants to upgrade to 3.0 the utility will then change the existing database appropriatly. Or a user wants to go from 2.0 to 3.0 and so forth.
So a utility that will let me store what needs to changed in the database from version to version, and make these changes on upgrade. That way, the users don't lose any data and the program won't crash from trying to access a column that was not in the older versions.
Thanks in advance,
I also posted this on the Database board, but this moves faster, sorry if it is in the wrong spot 
***********************
Tony Fontenot
Recreational Solutions
tony@recsolutions.com
***********************
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I tried to install the Soap Toolkit 2.0, but it fails to register SOAPISAP.dll on install. No sample runs cause it can't create the COM objects it needs. I can't register any of the DLLs manually. I run WinXP and VS .NET.
Any ideas ?
Thanks
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I just loaded Visual C++.net along with the existing Visual C++ 6.0. Has anyone got these two together on one machine. I seem to be having strange results on programs that worked fine before on C++ 6.0. I am running XP and after loading Visual C++.net a week ago I had to redo my whole machine as everything became unstable.
Also what's with the 1 hour loading time and 2gbyte size for the new compiler. So far it's feeling like a big step backwards.
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Make sure your system INCLUDE, LIB and PATH environment variables don't mess up.
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Hey,
I'm not sure if this is actually a CString problem or not. I'm working on a program that reads a log file, converts it to an HTML table, then saves it as a user defined HTML file. When I first started I hardcoded it to save as output.html. Then I added a little edit control that lets you define the file. This is the code I use for it:
void CMFC2Dlg::OnSave()
{
CStdioFile File;
CString FileName;
GetDlgItemText(IDC_OUTNAME, FileName);
if(File.Open(FileName, CFile::modeCreate | CFile::modeNoTruncate | CFile::modeWrite | CFile::typeText))
File.WriteString(LogConvert);
else
MessageBox("Could not write file", FileName, MB_OK);
}
I thought it might have got stuck in my ram somewhere, but I restarted my computer and it still doesn't work... I'm clueless.
Any help is very much appreciated, thanks in advance!
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Have you tried stepping through the code to see where it fails ? I won't bother nagging you about how you should use proper C++ streams 
Christian
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
And you don't spend much time with the opposite sex working day and night, unless the pizza delivery person happens to be young, cute, single and female. I can assure you, I've consumed more than a programmer's allotment of pizza, and these conditions have never aligned. - Christopher Duncan - 18/04/2002
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Yea, I tried stepping through it... It stepped through the code fine.
I deleted the entire thing, then restored files one by one from the recycling bin until it compiled, and that gave me some errors in the code, so I fixed those and now it works... wierd. :p
I wouldn't bother being nagged about proper c++ strings. This is my very first Visual C++ program, so I'm just doing whatever works till I find out better :P
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Emearg wrote:
I wouldn't bother being nagged about proper c++ strings. This is my very first Visual C++ program, so I'm just doing whatever works till I find out better
Then this is the perfect time for you to learn to do things properly instead of MFC *crap*.
If you #include fstream, you can create a file like this:
using std::ofstream.
ofstream f("c:\file.txt");
f << Mystring << MyInt << MyCustomTypeThatIWroteAStreamHandlerForAfterReadingChristiansArticleOnCP;
f.close();
It's neater, it works just as well, and it's portable ( you can use it where you aren't using MFC, you can use it on any C++ platform in fact ).
I would suggest you look at the stl instead of the awful MFC containers, iostreams instead of MFC file handling, and be aware of std string, although CString is often a better choice.
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
And you don't spend much time with the opposite sex working day and night, unless the pizza delivery person happens to be young, cute, single and female. I can assure you, I've consumed more than a programmer's allotment of pizza, and these conditions have never aligned. - Christopher Duncan - 18/04/2002
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Emearg wrote:
File.WriteString(LogConvert);
I have had a lot of trouble when I used a CString with WriteString. Use a char array.
char str[1024];
strcpy(str,LogConvert);
File.WriteString(str);
Nish
The posting stats are now in PDF:-
http://www.busterboy.org/codeproject/
Feel free to make your comments.
Updated - May 04th, Saturday
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Nish, Nish, why on earth would you do it this way ?
File.WriteString (LogConvert.GetBuffer(LogConvert.GetLength());
LogConvert.ReleaseBuffer;
This is precisely the sort of ad hoc 'create something big enough to always work' stuff that C++ does away with needing. strcpy is a C function.
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
And you don't spend much time with the opposite sex working day and night, unless the pizza delivery person happens to be young, cute, single and female. I can assure you, I've consumed more than a programmer's allotment of pizza, and these conditions have never aligned. - Christopher Duncan - 18/04/2002
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I guess I still have my bad habits from C left inside me 
Nish
The posting stats are now in PDF:-
http://www.busterboy.org/codeproject/
Feel free to make your comments.
Updated - May 04th, Saturday
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Christian Graus wrote:
File.WriteString (LogConvert.GetBuffer(LogConvert.GetLength());
LogConvert.ReleaseBuffer;
Using GetBuffer( ) has to call ReleaseBuffer( ). If I code this way:
File.WriteString(LogConvert.operator LPCTSTR());
Is there any difference between GetBuffer() and operator LPCTSTR() ?
Maxwell Chen
People say "No news is good news". Then, no code is good code!?
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operator LPCTSTR() is the same as casting to LPCTSTR, which is less ugly IMO
(LPCTSTR) LogConvert
The fact that they provide the operator leaves me confused as the why they have GetBuffer as well. I'll have to check.
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
And you don't spend much time with the opposite sex working day and night, unless the pizza delivery person happens to be young, cute, single and female. I can assure you, I've consumed more than a programmer's allotment of pizza, and these conditions have never aligned. - Christopher Duncan - 18/04/2002
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The reason that they have the operator LPCTSTR() and GetBuffer() is that the first converts a CString to an LPCTSTR, while the second returns a pointer to the buffer of the CString as an LPTSTR. The LPCTSTR is a const TCHAR*, which doesn't allow the buffer to be modified, while the LPTSTR allows the contents of the buffer to be modified.
The operator LPCTSTR() from CString allows a CString to be used anywhere that you need an LPCTSTR. This means that you can simply write:
CStdioFile File; // assume that this file is already open for write...
CString LogConvert; // assume that this string is filled in...
File.WriteString( LogConvert ); // since WriteString takes an LPCTSTR, this is all that is needed.
This is one of the things about CString that I prefer over std::string. For std::string, you would need to explicitly convert the string:
std::string LogConvert;
File.WriteString( LogConvert.c_str() );
Some people prefer the method used by std::string, as you are in control of when the conversion is made, but I prefer the simplicity of just passing the string. This is particularly useful when interfacing with legacy code. For new code, I probably would just pass the string object.
Best regards,
John
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Howdy all,
Does anyone have any suggestions for an API function similar to DrawDibDraw(), which can handle a negative height bitmap, aka an inverted bitmap?
MSDN explicitly states that DrawDibDraw can't handle a negative height parameter, but I can't find a useful alternative.
Please don't tell me I have to flip the bitmap by hand
TIA,
Pete
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By definition, a "negative height" is impossible. It has a height. The problem seems to be that you've got a DIB (that is "just" upside-down) and you want to draw it.
If that's the case, and it's not a DIB, I don't think you have much of a choice.
I however fail to see why you are so reluctant to "flip the bitmap by hand", it's after all just nothing more than memcpy'ing a line at a time from your used format to the format Win32 expects it to be.
Perhaps you can even use that memory as-is if it's layout is compatible with a DIB, and just tell a DIB to use it?
Short of you explaining your problem a little more, and my suggestions don't work for you, I think you're out of luck.
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I'm afraid my previous post was rather cryptic, let me explain this a bit better
By negative height, I meant that the DIBs BITMAPINFOHEADER.biHeight is a negative value. I believe this means that the 1st scanline of data refers to the bottom line of the image, rather than the top line, and the second scanline of data refers to the second-from-bottom image line, rather than the second-from-top image line. This is a documented feature of the DIB format, it's just that DrawDibDraw() can't handle it. From MSDN:
...and the biHeight member must be a positive value; DrawDibDraw will not draw inverted DIBs...
I agree that flipping the DIB by hand wouldn't be too tricky, but the issue here is speed. I would like to be displaying around 60 bitmaps a second (I'm trying to display an avi stream), and I think the overhead of manually 'un-inverting' the DIBs would be too high.
There's also an element of me being stubborn about Win32 not supporting a documented feature of the DIB format
I have actually been able to use StretchDIBits()successfully since my first post, but unfortunately it appears to use a different image-scaling algorithm which can produce a rather ugly bitmap. And it's also a bit slower than DrawDibDraw(), which is obviously an issue in my case.
Thanks for your help,
Pete
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moredip wrote:
60 bitmaps a second (I'm trying to display an avi stream)
OK. I suggest you have a look at the VirtualDub (www.virtualdub.org) source code. I think he's using the WFV API.
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Hi Mike,
I considered virtualdub, but my boss it concerned about the legal aspects of GPL, and would rather I didn't browse the source, lest I become 'contaminated' by that sneaky viral license
It turns out that VFW is no use anyway, as it can't deal with AVI files larger than 2GB (a throwback to when everyone M$ cared about was using FAT32, with it's 2GB file size limit).
So now I have the joy of learning DirectShow.
Thanks anyway!
Pete
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