Commit | Line | Data |
---|---|---|
c07a80fd | 1 | package DirHandle; |
2 | ||
d6dc8a6d | 3 | our $VERSION = '1.04'; |
b75c8c73 | 4 | |
c07a80fd | 5 | =head1 NAME |
6 | ||
7 | DirHandle - supply object methods for directory handles | |
8 | ||
9 | =head1 SYNOPSIS | |
10 | ||
11 | use DirHandle; | |
2b393bf4 | 12 | $d = DirHandle->new("."); |
c07a80fd | 13 | if (defined $d) { |
14 | while (defined($_ = $d->read)) { something($_); } | |
15 | $d->rewind; | |
16 | while (defined($_ = $d->read)) { something_else($_); } | |
17 | undef $d; | |
18 | } | |
19 | ||
20 | =head1 DESCRIPTION | |
21 | ||
22 | The C<DirHandle> method provide an alternative interface to the | |
23 | opendir(), closedir(), readdir(), and rewinddir() functions. | |
24 | ||
25 | The only objective benefit to using C<DirHandle> is that it avoids | |
26 | namespace pollution by creating globs to hold directory handles. | |
27 | ||
28 | =cut | |
29 | ||
30 | require 5.000; | |
31 | use Carp; | |
32 | use Symbol; | |
33 | ||
34 | sub new { | |
2b393bf4 | 35 | @_ >= 1 && @_ <= 2 or croak 'usage: DirHandle->new( [DIRNAME] )'; |
c07a80fd | 36 | my $class = shift; |
37 | my $dh = gensym; | |
38 | if (@_) { | |
39 | DirHandle::open($dh, $_[0]) | |
40 | or return undef; | |
41 | } | |
42 | bless $dh, $class; | |
43 | } | |
44 | ||
45 | sub DESTROY { | |
46 | my ($dh) = @_; | |
28ee7c39 SP |
47 | # Don't warn about already being closed as it may have been closed |
48 | # correctly, or maybe never opened at all. | |
04636146 | 49 | local($., $@, $!, $^E, $?); |
28ee7c39 | 50 | no warnings 'io'; |
c07a80fd | 51 | closedir($dh); |
52 | } | |
53 | ||
54 | sub open { | |
55 | @_ == 2 or croak 'usage: $dh->open(DIRNAME)'; | |
56 | my ($dh, $dirname) = @_; | |
57 | opendir($dh, $dirname); | |
58 | } | |
59 | ||
60 | sub close { | |
61 | @_ == 1 or croak 'usage: $dh->close()'; | |
62 | my ($dh) = @_; | |
63 | closedir($dh); | |
64 | } | |
65 | ||
66 | sub read { | |
67 | @_ == 1 or croak 'usage: $dh->read()'; | |
68 | my ($dh) = @_; | |
69 | readdir($dh); | |
70 | } | |
71 | ||
72 | sub rewind { | |
73 | @_ == 1 or croak 'usage: $dh->rewind()'; | |
74 | my ($dh) = @_; | |
75 | rewinddir($dh); | |
76 | } | |
77 | ||
78 | 1; |