Create an tbf parsing crate

[alexandruradovici]

For now, the tbf parsing source is in the header.rs file. The purpose of this is to make the tbf parse its own carte, so that it can be used in other projects.

[mihai-negru]

Should the tbf parsing crate be found under the src folder or to the root folder?

[alexandruradovici]

No, it should be its own crate in the root folder.

[mihai-negru]

Hi, I accidentally closed the last pull request, by synchronizing my master branch with the upstreams master branch, and I will work on using tbf types from the tock/tock repository instead of redefining them and will make another pull request (didn't know that it will close the pull request, sorry)

[mihai-negru]

As far I could see is that in elf2tab the new function is called to create an empty TbfHeader and then it starts to fill it with data, I looked at the parse_tbf_header from tock-tbf and seems to to the same thing, however it needs to have a header slice of u8 representing the base for the TbfHeader, so I thought it would be a good start to first populate the header slice (to modify the elf2tab code in order to create the header slice) and then to send it to the parse_tbf_header in order to create the TbfHeader, what is your suggestion regarding this starting point? Thanks for the answer

[alexandruradovici]

I think there are two parts here:

1. the creation and modification of a TBF header - that implies using the std library and collections
2. the parsing of a TBF header in readonly mode, that only allow the interpretation of the header, not its modification

The two parts should share data structures, some of them marked as #[no-std].

[alexandruradovici]

Moved issue to UPB-CS-OpenSourceUpstream/tbf-parser#1