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use sys
use "alloc"
use "die"
use "option"
use "result"
use "slcp"
use "sldup"
use "types"
pkg std =
type dir = struct
fd : sys.fd
buf : byte[16384]
len : int64
off : int64
base : int64
;;
const diropen : (p : byte[:] -> std.result(dir#, byte[:]))
const dirread : (d : dir# -> std.option(byte[:]))
const dirclose : (d : dir# -> void)
;;
const diropen = {p
var fd
var dir
fd = sys.open(p, sys.Ordonly | sys.Odir)
if fd < 0
-> `Err "couldn't open directory"
;;
dir = zalloc()
dir.fd = fd
-> `Ok dir
}
const dirread = {d
var len
var dent
if d.off >= d.len
len = sys.getdirentries(d.fd, d.buf[:], &d.base)
if len <= 0
-> `None
;;
d.len = len
d.off = 0
;;
dent = (&d.buf[d.off] : sys.dirent#)
d.off += (dent.reclen : int64)
-> `Some sldup(dent.name[:dent.namelen])
}
const dirclose = {d
sys.close(d.fd)
free(d)
}
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