Passing arrays between 'C' and PB

[Sandy Chevrette]

I now know (thanks to earlier responses to an e-mail I posted)
that PB arrays are stored column major order and have one
additional index for each dimension in the array then a 'C'
array does.

Now I have 2 additional questions:

Can I pass a 3 dimensional array from a 'C' program to a PB DLL?
What would the declaration look like for that method if I was
passing the array by value?

What about if I was passing a dynamically allocated array
(using 'new' in 'C') by reference?

Thanks for the help. I inherited the PB DLL and I have no
documentation to help me out and no previous experience with PB.

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[Lance Edmonds]

Sandy, your last statement caught my eye.

Is this "inherited copy" a legal licensed copy of PB/DLL? If so, it originally came with a help file. If not, please contact PowerBASIC Sales Dept to obtain a fully licensed copy of the compiler. mailto:[email protected][email protected]</A>

Thanks!

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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Sandy Chevrette]

Originally posted by Lance Edmonds:
Sandy, your last statement caught my eye.

Is this "inherited copy" a legal licensed copy of PB/DLL? If so, it originally came with a help file. If not, please contact PowerBASIC Sales Dept to obtain a fully licensed copy of the compiler. mailto:[email protected][email protected]</A>

Thanks!

Lance,

It is a licensed copy (someone left the company which is how
I 'inherited' it) and it does have help, but I did not find any
info regarding arrays between 'C' and PB...

Maybe I should take another look at the help (?)...


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[Cecil Williams]

Sandy,

Can I pass a 3 dimensional array from a 'C' program to a PB DLL?
What would the declaration look like for that method if I was
passing the array by value?

From your last statement in your post, how can you be sure
the dll accepts this type of array???? PB does not pass or,
"accept"(to my knowledge), arrays "byval", "byref" only. Why
would you even want to do this in C/C++ instead of passing
a pointer?

What about if I was passing a dynamically allocated array
(using 'new' in 'C') by reference?

This is the way to go. I would type cast the pointer in front of
the new operator: (whatever*) new whatever. As you probably
know, don't forget to "delete" the object you created.

Thanks for the help. I inherited the PB DLL and I have no
documentation to help me out and no previous experience with PB.

I would post the dll name and what it does on this forum. The
PB guys are very good in responding to posts. The party that
created this dll might see and be able to respond, on the basis
that the dll is legal in your care of course!!!

There is another way to incorporate a PowerBasic dll in C/C++.
Peter Stephensen and I did a short course on this a few months
back. Search the forum for "lib" and you should find it. This
procedure allows creating a LIB for linking at "load-time".
You need the exported procedure info though.

Hope this helps!

Cheers,
Cecil

Addendum: Hey dude, from your original post, you were describing
a dll created by PB not the main program itself. Please be more
specific in the future about what you are doing!!!!

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[This message has been edited by Cecil Williams (edited May 10, 2001).]