This changes file descriptors from uint32 to int32 and the
corresponding file table to reject negative values. This ensures
invalid values aren't mistaken for very large descriptor entries, which
can use a lot of memory as the table implementation isn't designed to
be sparse.
See https://pubs.opengroup.org/onlinepubs/9699919799/functions/dirfd.html#tag_16_90
Signed-off-by: Adrian Cole <adrian@tetrate.io>
This removes the generally frowned upon practice of dot imports by
shortening the name of internal/wasi_snapshot_preview1 to
internal/wasip1. This leaves the external one alone as it would break
users to change it.
Signed-off-by: Adrian Cole <adrian@tetrate.io>
