Over the last week I have been porting GFile to iOS. As such I have been getting used to the environment that iOS places app developers in. iOS apps only allow developers to access certain directories when doing file I/O. Any directory accessed outside of these specified locations will give you a "permission denied" error. The app needs to be given access to directories outside of it's "sandbox" by the user, and even then you still do not have access to the whole device. With these restrictions I need to conform the GFile implementation as to not access files that the operating system does not allow to be accessed.
I first started out the GFile implementation by copying what was done on Mac, and mold it into something that would work on iOS. At the moment I have some of the functionality working on iOS, but not all of it. First thing was to get opening a file working, this was as simple as checking if the file was in the sandbox and give it to the user, if the file was not in the sandbox then I would return an error stating that the user did not have permissions to access the file.
Another thing to consider was the directories that the user has access to, specifically giving those directories names. After a long meeting with the other App porting developer, we had come up with a few names for Gateware to use that are not platform-dependent like the names used by Apple and Microsoft. Here are some examples of directory name changes:
Library -- UserFolder
tmp -- TempFolder
Library/Caches -- CacheFolder
Overall the GFile port has been going smoothly, I hope to complete this by Wednesday.
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