The `file->bytes` function uses the file size with `read-bytes`, and it appears that the Mac OS `read` system call errors on requests of 2GB or more. The right fix is for the `read` call within Racket (at the rktio layer) to limit the size that it passes, and I'll make that change.
Meanwhile, you could work around the problem by limiting the size of an individual request: Allocate a byte string and then use a sequence of `read-bytes!` calls to read the file in increments. Each time, use the number of read bytes to increment a starting position into the destination byte string (which is the third argument to `read-bytes!`). Matthew At Wed, 15 Jul 2020 15:05:22 -0700 (PDT), Greg Rosenblatt wrote: > Hi, I'm getting an error while using file->bytes to load a moderately large > file: > > > (time (void (file->bytes "my-7.6GB-file"))) > ; error reading from stream port > ; port: #<path:/Users/greg/my-7.6GB-file> > ; system error: Invalid argument; errno=22 > ; context...: > ; /Applications/Racket v7.7/collects/racket/file.rkt:768:6: temp218 > ; /Applications/Racket > v7.7/collects/racket/private/more-scheme.rkt:336:52 > ; eval-one-top > ; /Applications/Racket v7.7/share/pkgs/xrepl-lib/xrepl/xrepl.rkt:1478:0 > ; /Applications/Racket v7.7/collects/racket/repl.rkt:11:26 > > Is there a limit to the size of files that can be used with file->bytes? > > I was preferring file->bytes because it seems much faster than manually > reading from a port. If file->bytes is not appropriate here, can somebody > recommend another fast approach? > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/e99edda0-06ed-4164-b7bd-46f8a458 > c6c8o%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/20200715163230.343%40sirmail.smtp.cs.utah.edu.
