[R-pkg-devel] how to prevent a small package from yielding a large installed size?

[Ivan Krylov]

On Mon, 15 Jun 2020 12:52:20 -0400
Duncan Murdoch <murdoch.duncan using gmail.com> wrote:

> maybe someone else can suggest how to read an object from 
> the .rdb file using R code.  Internally R uses C code for this.

This function seems to work for me:

# filename: the .rdb file
# offset, size: the pair of values from the .rdx
# type: 'gzip' if $compressed is TRUE, 'bzip2' for 2, 'xz' for 3
readRDB <- function(filename, offset, size, type = 'gzip') {
	f <- file(filename, 'rb')
	on.exit(close(f))
	seek(f, offset + 4)
	unserialize(memDecompress(readBin(f, 'raw', size - 4), type))
}

-- 
Best regards,
Ivan