is_compressed

Helper function for is_rdata, checks if the file is a compressed (gzip) file. Does not (yet) check for bzip2 or xz compression.

Usage

is_compressed(filename, magic.number = as.raw(c("0x1f", "0x8b")))

Arguments

filename

The filename of the file to test for magic compression codes

magic.number

The magic numbers in as a vector of strings with the hexadecimal numbers (e.g. "0x1f")

Value

boolean, TRUE if the file is compressed