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-rw-r--r--lib/fileutil/walk.myr55
1 files changed, 37 insertions, 18 deletions
diff --git a/lib/fileutil/walk.myr b/lib/fileutil/walk.myr
index 75ed5e2..dbdfb5f 100644
--- a/lib/fileutil/walk.myr
+++ b/lib/fileutil/walk.myr
@@ -1,18 +1,33 @@
use std
+use "loopcheck"
+
pkg fileutil =
type walkiter = struct
dirstk : std.dir#[:]
curdir : byte[:][:]
- iterdir : bool
+ loopck : loopcheck
;;
impl iterable walkiter -> byte[:]
- const bywalk : (dir : std.dir# -> walkiter)
+ const bywalk : (dir : byte[:] -> walkiter)
;;
-const bywalk = {d
- -> [.dirstk = std.sldup([d][:]), .curdir = std.sldup([""][:])]
+const bywalk = {p
+ match std.diropen(p)
+ | `std.Ok d:
+ -> [
+ .dirstk = std.sldup([d][:]),
+ .curdir = std.sldup([std.sldup(p)][:]),
+ .loopck = mkloopcheck(p),
+ ]
+ | `std.Err e:
+ -> [
+ .dirstk = [][:],
+ .curdir = [][:],
+ .loopck = mkloopcheck(p),
+ ]
+ ;;
}
impl iterable walkiter -> byte[:] =
@@ -20,34 +35,38 @@ impl iterable walkiter -> byte[:] =
var cur, p
:nextfile
+ if itp.dirstk.len < 1
+ freeloopcheck(itp.loopck)
+ -> false
+ ;;
cur = itp.dirstk[itp.dirstk.len - 1]
match std.dirread(cur)
| `std.Some ".": goto nextfile
| `std.Some "..": goto nextfile
| `std.Some ent:
p = std.pathcat(itp.curdir[itp.curdir.len - 1], ent)
+ if looped(itp.loopck, p)
+ std.slfree(p)
+ goto nextfile
+ ;;
if std.fisdir(p)
match std.diropen(p)
- | `std.Ok d: std.slpush(&itp.dirstk, d)
+ | `std.Ok d:
+ std.slpush(&itp.dirstk, d)
+ std.slpush(&itp.curdir, p)
| `std.Err e: /* ? */
+ std.slfree(p)
;;
- std.slpush(&itp.curdir, p)
goto nextfile
- else
- valp# = p
;;
+ valp# = p
-> true
| `std.None:
- /* don't close the directory given to us by the user */
- if itp.dirstk.len > 1
- std.dirclose(itp.dirstk[itp.dirstk.len - 1])
- std.slfree(itp.curdir[itp.curdir.len - 1])
- std.slpop(&itp.curdir)
- std.slpop(&itp.dirstk)
- goto nextfile
- else
- -> false
- ;;
+ std.dirclose(cur)
+ std.slfree(itp.curdir[itp.curdir.len - 1])
+ std.slpop(&itp.curdir)
+ std.slpop(&itp.dirstk)
+ goto nextfile
;;
}