Add helper for walking the resource directory inside a PE file

[Guiguiprim]

Add new API to allow walking the resource directory inside a PE file.

The entry point is PeFile::resource_directory_table(&self) -> Result<ResourceDirectoryTable<'data>>, from there it offers an iterator to visit every entries in the directory (ResourceDirectoryTable::iter(&self) -> impl Iterator<Item = ResourceDirectoryEntry<'data>>).

The API is mostly lazy, only reading data as needed (doesn't read entries and sub-directories data unless visited).

Also add a small binary perscdump as an example which print the resource data tree.

[philipc]

Thanks for working on this!

[philipc]

I know the comment below says that IDs are 16-bit, but the Microsoft PE Format documentation says they are 32-bit.

Ghidra parses them as 16-bit, so I'm not sure what is correct here.

[Guiguiprim]

It looks like the changes I made in readobj are making the tests fails, but I not sure why and I'm not able to reproduce locally.

Is there a special setup I should follow for running those tests ?

[philipc]

You'll need to run git submodule update --init.

[Guiguiprim]

I never made PRs with submodule.
I guess, if needed, I need to make a PR in https://github.com/gimli-rs/object-testfiles first and update the submodule SHA1 in this PR second, right ?

[philipc]

No, you don't need to change the submodule, you just need to ensure git has checked it out so that you have a copy of https://github.com/gimli-rs/object-testfiles/blob/8392ac7ffa09cd31f24aa0f3ef77e08034cbca41/pe/base-gnu.exe, and then update the readobj output in https://github.com/gimli-rs/object/blob/master/crates/examples/testfiles/pe/base-gnu.exe.readobj.

[Guiguiprim]

Done

No, you don't need to change the submodule,

The test sources are in one place and the test expected outputs in an other, makes sense. Them having the same folder name confused me a little bit.