coolbutuseless, 1 month ago Is there a blessed way to create a RAWSXP from an existing chunk of memory within C? Specifics: The memory is already allocated elsewhere I don't want to use memcpy, just wrap the memory where it is such that the RAWSXP points to it. I don't want the garbage collector to know about it - I will free the memory myself later. It still has to be valid RAWSXP that I can use in R This is a bit of a callback to this post: https://fosstodon.org/@coolbutuseless/111956983679205597 #RStats #challenge
Is there a blessed way to create a RAWSXP from an existing chunk of memory within C?
Specifics:
This is a bit of a callback to this post: https://fosstodon.org/@coolbutuseless/111956983679205597
#RStats #challenge
coolbutuseless, 1 month ago The reason I want to wrap existing memory in a raw vector: R does not expose handling of "connections" within C In C, I have existing memory to write to an R connection I have to alloc a RAWSXP of the appropriate size & copy the memory into it Then call out to R (from C) to the function writeBin() And writeBin() is just going to unbox this & use the raw memory So a 'fake' SEXP header would save a bit of unnecessary overhead & copying And there is lots of data to write! #RStats
The reason I want to wrap existing memory in a raw vector:
So a 'fake' SEXP header would save a bit of unnecessary overhead & copying
And there is lots of data to write!
#RStats
coolbutuseless, 1 month ago Obviously, I'm going to try and write it, but I was hoping it was a known thing that was already exposed in the R API. #RStats
Obviously, I'm going to try and write it, but I was hoping it was a known thing that was already exposed in the R API.
exa, 1 month ago @coolbutuseless how does writeBin handle the connection? (Most likely it is C code already that can be copypasted or so, or perhaps at least called with lighter parameters than SEXPs)
@coolbutuseless how does writeBin handle the connection? (Most likely it is C code already that can be copypasted or so, or perhaps at least called with lighter parameters than SEXPs)
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