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Thanks for all your help everyone!!!!!

I've got it!!!!!!!!!

I'm not sure why the dll methods were crashing out, but I rebuilt the dll and it is all working!

I would like to use a method written in another c file that I have.

How would I do this?

Rellocating ....

From the JNI method... I called initDLL(), loading the dll and functions...
then I called the getOutputFile(), which completes, and on the return from getOutputFile() to the JNI...

After trying to figure out my nice error... I came up with this...

The dll is loaded, the GetProcAddress(....) returns okay. I check for a NULL return from the GetProcAddress(....)

//... ...

Thanks.

Wasn't sure if I need to add the source == NULL or destination == NULL after using free(), but figured it wouldn't hurt.

I don't mind removing extra lines either. :o)

I'm getting...

Reading about realloc() now... I used malloc() and free() not realloc().

Is there really a difference which way I do it? Do they both produce the same results?

I'm crashing out ... Instead of pieces, here's the chunk of it. Please help.... :)

I have a function that I call from Java ... It initializes the DLL, returns if that fails, otherwise calls the...

char *destination = NULL;
copy(&destination, source);

I believe that is what I want.

I have quite a few functions that I don't want to keep assigning variables to.

Seems so much easier to...

I read that link thanks..

I'm still having issues...

If I use malloc in the function, I should clean it up when I leave that
function.

I don't need the char* for anything else. I'm done...

What am I doing wrong?

I had:


void copy(char* destination, const char* source)
{
int length;

if (!source)

Sorry, my bad for typing the wrong name ...

The dll function call is not the same as the function call.

Yes, the dll function call does not return with a value to indicate that it has...

The dll function is being called, takes an input.xxx and creates an output.xxx which I need send back around for each ext.


void createOutputFile()
{
int errorCode;
int index = 0;
...

Timers...

I have a call to a dll function which creates an output.txt file.

I need to use that file afterwards, but have no way to know how long it is going to take to create the file. The...

So simple of a name. :) Thanks.

Is there a way to rename a file? I see create/open/delete/write ... etc

So checking for malloc to have done something means two things to me:

1. Either set the char* name = NULL
And then the
if (!name) { } will fail if malloc didn't do it's job.

Is...

Thanks everyone for helping... another question though.

I have:


char* name = malloc(CHAR_BUFFER_SIZE);

if (name)
{
// do whatever I need

Just a little clarification, please:

If I use malloc, where CHAR_BUFFER_SIZE is previously defined to 256, for example:


char* name = (char *)malloc(CHAR_BUFFER_SIZE);

I need to free it...

The c code contains a load dll method. Loads the unzip32.dll

The method I wrote was to call the dll function to extract the zip entries from the specified zip file name.

Takes the file name,...

Hmm.... not sure of the term to use I guess.

What I am trying to do is to access methods in a dll from Java (using JNI).

I can call native methods, ie: isZipFile(.... ) extractZip(.... ). ...

I have created a dll that contains a couple of methods, one is to check a zip file to see if the entries match criteria. Another method extracts the entries.... and so on.

There other methods...

Hmm... it appears to be working now. :o) Thanks for all your help!!!!!

Thank you!!!

That works when testing in C -- but when I call it from the JNI method, it crashes out if I don't copy it.

Any idea why?

I just have the dll and a few files that I created the dll from. I don't have all of them.
Switching computer, years ago, blah, blah, and I apparently didn't copy the entire
directory.

I'll...

If I understand you right .. the buffer would become invalid.

Okay, makes sense...

I need the value to stick around for a few other functions.

If I return the pointer, created by copyTCHAR,...