Commit | Line | Data |
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c07a80fd | 1 | package DirHandle; |
2 | ||
b75c8c73 MS |
3 | our $VERSION = '1.00'; |
4 | ||
c07a80fd | 5 | =head1 NAME |
6 | ||
7 | DirHandle - supply object methods for directory handles | |
8 | ||
9 | =head1 SYNOPSIS | |
10 | ||
11 | use DirHandle; | |
12 | $d = new DirHandle "."; | |
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 | ||
95e8664e CN |
28 | =head1 NOTES |
29 | ||
30 | =over 4 | |
31 | ||
32 | =item * | |
33 | ||
34 | On Mac OS (Classic), the path separator is ':', not '/', and the | |
35 | current directory is denoted as ':', not '.'. You should be careful | |
36 | about specifying relative pathnames. While a full path always begins | |
37 | with a volume name, a relative pathname should always begin with a | |
38 | ':'. If specifying a volume name only, a trailing ':' is required. | |
39 | ||
40 | =back | |
41 | ||
c07a80fd | 42 | =cut |
43 | ||
44 | require 5.000; | |
45 | use Carp; | |
46 | use Symbol; | |
47 | ||
48 | sub new { | |
49 | @_ >= 1 && @_ <= 2 or croak 'usage: new DirHandle [DIRNAME]'; | |
50 | my $class = shift; | |
51 | my $dh = gensym; | |
52 | if (@_) { | |
53 | DirHandle::open($dh, $_[0]) | |
54 | or return undef; | |
55 | } | |
56 | bless $dh, $class; | |
57 | } | |
58 | ||
59 | sub DESTROY { | |
60 | my ($dh) = @_; | |
61 | closedir($dh); | |
62 | } | |
63 | ||
64 | sub open { | |
65 | @_ == 2 or croak 'usage: $dh->open(DIRNAME)'; | |
66 | my ($dh, $dirname) = @_; | |
67 | opendir($dh, $dirname); | |
68 | } | |
69 | ||
70 | sub close { | |
71 | @_ == 1 or croak 'usage: $dh->close()'; | |
72 | my ($dh) = @_; | |
73 | closedir($dh); | |
74 | } | |
75 | ||
76 | sub read { | |
77 | @_ == 1 or croak 'usage: $dh->read()'; | |
78 | my ($dh) = @_; | |
79 | readdir($dh); | |
80 | } | |
81 | ||
82 | sub rewind { | |
83 | @_ == 1 or croak 'usage: $dh->rewind()'; | |
84 | my ($dh) = @_; | |
85 | rewinddir($dh); | |
86 | } | |
87 | ||
88 | 1; |