C / C++ / MFC

15-Jan-07 23:37

Hey.

This seemed like the most relevant forum but sorry if it isnt.

I am using Visual Studio 2003.NET and would like to know how can I get it to compile files written in x86 assembler code alongside my project.

I have tried adding "E:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\ml.exe" /c /Cx /coff $(inputpath) as a custom build step with the output set to $(InputName).obj. But every time i build i get unresolved external.

At the top of my C++ file i have extern asmfunction.

Any one spot any beginners pitfalls I may have stumbled blindly into.

Cheers.

Dan.

Rage16-Jan-07 1:30

Rage

16-Jan-07 1:30

Why are you using the command line ?
Build the asm to a lib using a separate project, and then bind all projects in the workspace.

DanB198316-Jan-07 1:45

16-Jan-07 1:45

Hey.

Thanks for the help but that is the problem - i am unsure how to compile the asm code.

Thanks for any help.

Dan

David Crow16-Jan-07 3:11

David Crow

16-Jan-07 3:11

DanB1983 wrote:
But every time i build i get unresolved external.

Regarding what (e.g., functions in your .asm files, or in your .cpp files)? Are your .asm files being compiled into .obj files?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

DanB198316-Jan-07 3:30

16-Jan-07 3:30

Hey thanks for the reply.

The problem is that I have an asm function that writes to video memory called ClearRectangle(BYTE left, BYTE top, BYTE right, BYTE bottom, BYTE colour).

I attempt to compile this with ml.exe (as per the build step i talked about in my first post).

I also have a cpp file that simplified looks like this:

typedef char BYTE;
extern ClearRectangle(BYTE left, BYTE top, BYTE right, BYTE bottom, BYTE character, BYTE colour);

int main(void)
{
ClearRectangle(0, 0, 80, 25, 0xDB, 0x1);
}

When i compile this i get ASM error LNK2019: unresolved external symbol "void __cdecl ClearRectangle(char left, char top, char right, char bottom, char character, char colour)"

David Crow16-Jan-07 4:04

David Crow

16-Jan-07 4:04

DanB1983 wrote:
The problem is that I have an asm function that writes to video memory called ClearRectangle...

Have you considered doing this via Win32? I'm not sure how it compares speed-wise, but you would get past this compiler/linker roadblock.

DanB1983 wrote:
When i compile this i get ASM error LNK2019: unresolved external symbol "void __cdecl ClearRectangle(char left, char top, char right, char bottom, char character, char colour)"

Which indicates that the ASM's .obj file is not being linked. You'll need to make that change.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

DanB198316-Jan-07 5:00

16-Jan-07 5:00

Hi
Win32 isnt really an option I am doing this as an exercise in asm.

How do i link in the obj file? I have looked at additional dependancies etc but am still not sure.

Thanks

Dan

David Crow16-Jan-07 5:42

David Crow

16-Jan-07 5:42

DanB1983 wrote:
How do i link in the obj file?

Project Settings (Alt+F7)
    --> Link tab
        --> Object/library modules

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

James R. Twine16-Jan-07 6:51

James R. Twine

16-Jan-07 6:51

DanB1983 wrote:
The problem is that I have an asm function that writes to video memory called ClearRectangle(BYTE left, BYTE top, BYTE right, BYTE bottom, BYTE colour).

This is a little OT, but is this from an older (256-color) DOS-based application? You cannot (easily) write directly to video memory from a normal Win32 application, so I am not sure that this will work correctly even after you resolve the linking problem. We have come a long way from the days of ModeX programming. Smile | :)

   It looks like a character-based operation, but I figured I would make sure - given that the function takes no parameter to indicate which console window to use, or what address to write to...

   Also, BYTE is normally typedefed to unsigned char.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
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DanB198316-Jan-07 8:39

16-Jan-07 8:39

Hi.

Thanks for the typedef suggestion.

I am porting some functions I wrote using Borland Compiler 4.0 (C/C++) (16bit).
They worked under windows 2k and windows XP. The screen memory location is within the function:- b800h that is then used along with an offset and simple maths to write chars at the correct positions.

I have quite a few asm screen related functions that need porting - this is just a practice so I think I will just continue to use BC v4.0

Thanks for every ones help.

Dan

About Dialog BackGround images..

James R. Twine16-Jan-07 11:43

James R. Twine

16-Jan-07 11:43

Heh - I remember B800 quite well! Smile | :)

   I am surprised that things are working correctly writing directly to that address actually does anything under Windows, unless running in a DOS prompt, but now that I think about it, you are using character locations, so that actually makes a bit of sense... :/

   Good luck to you...! - If sticking with character operations, it might be worth investigating the Console functions. They are a bit of a pain in the ass to use, especially if doing anything in color, but they are the Win32 way of doing things...

   Peace!

klvin15-Jan-07 23:14

klvin

15-Jan-07 23:14

Hi !!

How can I set Jpeg image as a dialog background ???
I know how to set the Bmp as a dialog background.But, I don't know how to set a Jpeg image.
Can anyone please give me the solution for this.

Thanks & Regrads,
klvin.

QuickDeveloper16-Jan-07 0:28

QuickDeveloper

16-Jan-07 0:28

klvin wrote:
How can I set Jpeg image as a dialog background ???

Hi,If you are using VC8 see the CImage Class in MSDN.Using that you can get the Handle of JPEG and use it as BMP to display the image.

"Every morning I go through Forbes list of 40 richest people in the world. If my name is not in there, I go to work..!!!"

Hamid_RT16-Jan-07 1:12

Hamid_RT

16-Jan-07 1:12

CImage m_Image;
m_Image.Load(yourfile);
m_Image.BitBlt(...);

Or you can use of GDI+

WhiteSky

prasad_som15-Jan-07 23:16

prasad_som

15-Jan-07 23:16

And whats that ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

toxcct15-Jan-07 23:25

toxcct

15-Jan-07 23:25

prasad_som wrote:
And whats that ?

what's what ? JPEG ? Confused | :confused:

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prasad_som15-Jan-07 23:27

prasad_som

15-Jan-07 23:27

I'd replied to his empty message. Which he's deleted. Again, keeping my reply hanging.

toxcct wrote:
JPEG ?

I know that.

Prasad
Notifier using ATL | Operator new[],delete[][^]

toxcct15-Jan-07 23:36

toxcct

15-Jan-07 23:36

he deleteda duplicate message, and that's better than leaving the same message posted twice... Wink | ;)

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