Some questions about making a library

Discuss PocketC for Palm OS (including Desktop Edition)

Postby izzy on Tue Mar 08, 2005 6:44 pm

Hi,
I've gotten bored with PocketC and started to learn C proper. The fist thing I made, of course, is a PocketC library. A couple of questions.

1) How do you declare a pointer argument in a library function?

I,ve declared it as a vtInt and then

long *lPtr;
lPtr = (*long)myInt.iVal;

Is this right?


2)Everything compiled correctly in CodeWarrior 9.0, but when I tried to compile a program using the library on my palm, it gave me the message ' MyFunc definition not found'. When I tried to compile it on the Emulator, it compiled correctly, but got an address error.I must have some setting or path messed up in CodeWarrior.

Can anyone help me?
izzy
 
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Postby izzy on Wed Mar 09, 2005 6:15 pm

Hello! Anyone out there? Please?
izzy
 
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Postby mgreen on Thu Mar 10, 2005 12:28 am

Look at the Native Libraries global function deref(int ptr). It converts a Pocket C pointer into a "real" PalmOS pointer which you can then use to reference the value you want.

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Michael Green
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Michael Green
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Postby izzy on Fri Mar 11, 2005 1:41 pm

Thanks, Anyone for Question 2?
izzy
 
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Postby dewey on Sun Mar 13, 2005 10:56 pm

Problem 1 would have caused the crash in problem two. If the function is not found when compiling on the device, you should check that your PocketCLibAddFunctions function is implemented correctly.
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