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package DirHandle; |
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our $VERSION = '1.00'; |
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=head1 NAME |
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DirHandle - supply object methods for directory handles |
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=head1 SYNOPSIS |
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use DirHandle; |
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$d = new DirHandle "."; |
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if (defined $d) { |
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while (defined($_ = $d->read)) { something($_); } |
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$d->rewind; |
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while (defined($_ = $d->read)) { something_else($_); } |
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undef $d; |
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} |
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=head1 DESCRIPTION |
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The C<DirHandle> method provide an alternative interface to the |
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opendir(), closedir(), readdir(), and rewinddir() functions. |
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The only objective benefit to using C<DirHandle> is that it avoids |
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namespace pollution by creating globs to hold directory handles. |
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=head1 NOTES |
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=over 4 |
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=item * |
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On Mac OS (Classic), the path separator is ':', not '/', and the |
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current directory is denoted as ':', not '.'. You should be careful |
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about specifying relative pathnames. While a full path always begins |
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with a volume name, a relative pathname should always begin with a |
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':'. If specifying a volume name only, a trailing ':' is required. |
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=back |
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=cut |
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require 5.000; |
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use Carp; |
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use Symbol; |
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sub new { |
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@_ >= 1 && @_ <= 2 or croak 'usage: new DirHandle [DIRNAME]'; |
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my $class = shift; |
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my $dh = gensym; |
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if (@_) { |
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DirHandle::open($dh, $_[0]) |
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or return undef; |
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} |
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bless $dh, $class; |
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} |
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sub DESTROY { |
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my ($dh) = @_; |
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closedir($dh); |
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} |
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sub open { |
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@_ == 2 or croak 'usage: $dh->open(DIRNAME)'; |
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my ($dh, $dirname) = @_; |
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opendir($dh, $dirname); |
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} |
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sub close { |
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@_ == 1 or croak 'usage: $dh->close()'; |
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my ($dh) = @_; |
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closedir($dh); |
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} |
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sub read { |
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@_ == 1 or croak 'usage: $dh->read()'; |
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my ($dh) = @_; |
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readdir($dh); |
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} |
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sub rewind { |
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@_ == 1 or croak 'usage: $dh->rewind()'; |
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my ($dh) = @_; |
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rewinddir($dh); |
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} |
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1; |
