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Hello,
I'm developing under Visual Studio 2005. I read that Unicode support has been made the default in Visual Studio 2005. And I can't compile anything.
All usual API functions I use, expect char* pointer. When I pass them a wchar_t* pointer, i get a compiler error.
When I try to cast from wchar_t* to char* I get an error all the same.
Please, can somebody help?
Thanks
-- modified at 14:00 Friday 27th January, 2006
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check the size of the wchar_t value (i.e. check what sizeof(wchar_t) returns. In the past it was the same as an unsigned short. But I have heard that it is now no longer that by default. There should be some setting to turn that back on somewhere in the project C++ settings.
¡El diablo está en mis pantalones! ¡Mire, mire!
Real Mentats use only 100% pure, unfooled around with Sapho Juice(tm)!
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Save an Orange - Use the VCF!
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If you're using MFC, a simple way to do it is by using CStringA:
<br />
wchar_t* pBlah = L"blah";<br />
CStringA strAnsi(pBlah);<br />
CallAPI(strAnsi);<br />
If you're not using MFC, there's a handful of ways of doing it. The common Win32 routine is WideCharToMultiByte.
BTW, which APIs are you calling that expect a char*?
"My dog worries about the economy. Alpo is up to 99 cents a can. That's almost seven dollars in dog money" - Wacky humour found in a business magazine
-- modified at 14:49 Friday 27th January, 2006
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Actually I'm using MFC and your trick is very clever.
Thanks for replying.
Cheers,
Allad
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If you're using MFC8, there's a better trick: CW2A() (there's actually a bunch of conversion classes, which you'll find the MSDN help)
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These were introduced with VS 2002 IIRC - they are certainly in VS 2003.
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Robert Edward Caldecott wrote: These
In ATL yes, but not in MFC, IIRC.
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Jack Squirrel wrote: The common Win32 routine is WideCharToMultiByte.
I've read the MSDN page on WideCharToMultibyte. However, I can't figure out how to properly do the conversion. WCharToMutibyte has lots of conversion flags and I'm not very used to code pages and so
on.
Can you please tell me how to convert a simple wide char string pointer to usual one byte char pointer?
Thanks,
Allad
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Sounds like the easy out would be to simply change to an ANSI build.
Steve
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Stephen Hewitt wrote: Sounds like the easy out would be to simply change to an ANSI build.
I've tried but I don't know which option to enable under the project settings in VC++ 2005.
Can you help?
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I use MSVC6. He's how I do it:
1. Select "Project->Settings...".
2. Select "C/C++" tab.
3. In the "Category" combo select "General".
4. In the "Preprocessor definitions" edit remove "UNICODE" and "_UNICODE" and add "_MBCS".
Hopefully you can adapt these steps to 2005.
Steve
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Thanks for your post.
However, I'd like to enable support for ANSI rather than Mutibyte characters.
Which compiler flag should I use instead of "_MBCS"?
Cheers,
Allad
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You can take out the "_MBCS" - But in windows when people say ANSI they really mean define "_MBCS". The previous version (MSVC6) would have had "_MBCS" defined. Check this[^] out. In short you should have "_MBCS" defined.
Steve
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Like a puzzle game, how can I swap the 'hole' with the 'target element'? I use 'switch' and 'pointer' but failed!! Pls advise!!
//Moving the hole.
void Move(int& holeidx,int move)
{
int tar_row; //The row of the target element
int tar_col; //The column of the target element
int hrow; //The row of the hole
int hcol; //The column of the hole
int temp=0; //A temporary variable for swapping
int number; //The index number of the target element
hrow = holeidx / size; //Calculate the row number of the hole
hcol = holeidx % size; //Calculate the column number of the hole
int* phole = 0; //The pointer of the hole
switch(move)
{
case 49: //(Press 1)
phole = &holeidx;
tar_row = ++hrow;
tar_col = --hcol;
break;
case 50: //(Press 2)
phole = &holeidx;
tar_row = ++hrow;
tar_col = hcol;
break;
case 51: //(Press 3)
phole = &holeidx;
tar_row = ++hrow;
tar_col = ++hcol;
break;
case 52: //(Press 4)
phole = &holeidx;
tar_row = hrow;
tar_col = --hcol;
break;
case 53: //(Press 5)
phole = &holeidx;
tar_row = hrow;
tar_col = hcol;
break;
case 54: //(Press 6)
phole = &holeidx;
tar_row = hrow;
tar_col = ++hcol;
break;
case 55: //(Press 7)
phole = &holeidx;
tar_row = --hrow;
tar_col = --hcol;
break;
case 56: //(Press 8)
phole = &holeidx;
tar_row = --hrow;
tar_col = hcol;
break;
case 57: //(Press 9)
phole = &holeidx;
tar_row = --hrow;
tar_col = ++hcol;
break;
case 113: //(Press q)
case 81: //(Press Q)
exit(1); //If Press Q to quit, exit the game directly.
break;
default:
break;
}
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I'm not sure what you're doing with phole, but it's being assigned the same value in every case of the switch statement. This is inefficient. Most of all, though, you don't need phole at all.
In addition, you don't need tar_row and tar_col either. Your switch statement can simply increment or decrement hrow and/or hcol directly. When you're finished, just convert these values back into holeidx.
You can stop here. This will solve your problem. Also...
You can remove the switch statement altogether and use a lookup table. Translate the '1' through '9' values into an index into this table. Table entries would be simple structs holding the modification to the row and column variables. You only need special traps for the 'q' key.
This table could be simplified even further by storing the modifier to holeidx. But this table would have to be built at run-time, since the value of size isn't known until then.
Bob Ciora
-- modified at 18:04 Friday 27th January, 2006
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I used to use a manifest file in the resources. But now with vc8, for the same app, I want it to get autogenerated (just like when you create a new project). Where's the setting that enables themes in the app and gets the right manifest to get generated? Please help...
Thanks!
swine
[b]yte your digital photos with [ae]phid [p]hotokeeper - www.aephid.com.
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I had the same trouble migrating from vc71. The first thing you need to do is remove your old manifest file from the resources.
Secondly, you need to add a small snippet of code to your vc6 project that exists in new vc8 projects, but is missing from migrated projects.
Create a new vc8 mfc project - at the bottom of the stdafx.h file, you'll see something like this:
<br />
...<br />
#ifdef _UNICODE<br />
<br />
...<br />
<br />
#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='x86' publicKeyToken='6595b64144ccf1df' language='*'\"")<br />
<br />
...<br />
<br />
#endif<br />
Copy the entire #ifdef block to the stdafx.h file of your old project and it should remedy the problem.
"My dog worries about the economy. Alpo is up to 99 cents a can. That's almost seven dollars in dog money" - Wacky humour found in a business magazine
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ok i did that, and did a rebuild all, but it still doesn't work... anything else?
thanks
[b]yte your digital photos with [ae]phid [p]hotokeeper - www.aephid.com.
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Strange, it worked for me and a handful of others I've talked to. I wonder if there's a setting that doesn't get updated from VC6 to 2005 that does with 2003 to 2005.
I would just create a simple VS 2005 project, and verify that the Linker -> Manifest File and Manifest Tool settings match that of your updated project.
If they're the same, and you still can't get it to work, I'd try posting something to the MSDN forums:
http://forums.microsoft.com/MSDN/default.aspx?ForumGroupID=8&SiteID=1
"My dog worries about the economy. Alpo is up to 99 cents a can. That's almost seven dollars in dog money" - Wacky humour found in a business magazine
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Try removing the #ifdef _UNICODE .... #endif block
-Prakash
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Brilliant! That did it.... Thanks 
[b]yte your digital photos with [ae]phid [p]hotokeeper - www.aephid.com.
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We use a combination of malloc() and the new operator in our VC++ programs. How can we get a summary of either or both items total memory allocation? The heap walker stuff doesn't seem to do anything unless you use those dinosaur LocalAlloc() / GlobalAlloc() calls which are not portable to Unix.
thanks for any help
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Another method would be to use "Performance Counters" on that process. I believe there may be a few other APIs that get various information as well.
8bc7c0ec02c0e404c0cc0680f7018827ebee
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Thanks Toby! There's still too much instrumentation for our simple needs. Here is what made the boss happy:
C:\Temp>printmemorystats.exe
total used 5054, free 760
OK - end of heap
total used 10174, free 3816
OK - end of heap
total used 12222, free 1760
OK - end of heap
total used 16318, free 5848
OK - end of heap
total used 24510, free 9936
OK - end of heap
total used 40894, free 14024
OK - end of heap
total used 73662, free 22128
OK - end of heap
total used 139198, free 26216
OK - end of heap
total used 270270, free 30304
OK - end of heap
total used 532414, free 34392
OK - end of heap
<code>#include <malloc.h>
#include <stdio.h>
static void PrintMemoryStats();
int main()
{
int sizemem=1024;
int ii;
char *foo;
for (ii=0; ii<10; ii++) {
PrintMemoryStats();
foo = malloc(sizemem);
sizemem *= 2;
}
}
static void PrintMemoryStats()
{
_HEAPINFO hinfo;
int heapstatus;
long totalUsed = 0, totalFree = 0;
hinfo._pentry = NULL;
while( ( heapstatus = _heapwalk( &hinfo ) ) == _HEAPOK )
{
if (hinfo._useflag == _USEDENTRY)
totalUsed += hinfo._size;
else if (hinfo._useflag == _FREEENTRY)
totalFree += hinfo._size;
}
printf ("total used %ld, free %ld\n", totalUsed, totalFree);
switch( heapstatus )
{
case _HEAPEMPTY:
printf( "OK - empty heap\n" );
break;
case _HEAPEND:
printf( "OK - end of heap\n" );
break;
case _HEAPBADPTR:
printf( "ERROR - bad pointer to heap\n" );
break;
case _HEAPBADBEGIN:
printf( "ERROR - bad start of heap\n" );
break;
case _HEAPBADNODE:
printf( "ERROR - bad node in heap\n" );
break;
}
}
</code>
-- modified at 15:25 Friday 27th January, 2006</code>
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