On master, Clang will emit NTuples, which is a bit nicer at least!
bytestring(UInt8[a...])
a = map(UInt8, ("abcd"...,))
Am Montag, 6. Juni 2016 01:41:34 UTC+2 schrieb J Luis:
>
> Hi,
>
> I have one of those types generated from a C struct with Clang.jl that
> turns a stack variable into a loooong list of members (for example (but I
> have longer ones))
>
> https://github.com/joa-quim/GMT.jl/blob/master/src/libgmt_h.jl#L1246
>
> (an in interlude: isn't yet any better way of representing a C "char
> str[256];"?)
>
> when executed I get (example)
>
> julia> hdr.x_units
> GMT.Array_80_Uint8(0x6c,0x6f,0x6e,0x67,0x69,0x74,0x75,0x64,0x65,0x20,0x5b,
> 0x64,0x65,0x67,0x72,0x65,0x65,0x73,0x5f,0x65,0x61,0x73,0x74,0x5d,0x00,0x00
> ,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
> 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
> ,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
> 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00)
>
> but I need to transform it into a string. After some suffering I came out
> with this solution
>
> julia> join([Char(hdr.x_units.(n)) for n=1:sizeof(hdr.x_units)])
> "longitude
> [degrees_east]\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
>
> well, it works but it's kind or ugly. Is there a better way of achieving
> this? Namely, how could I avoid creating a string with all of those \0's? I
> know I can remove them after, but what about not copying them on first
> place?
>
> Thanks
>
>
