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ulpfr |
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#!/usr/bin/perl |
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# -*- Mode: Perl -*- |
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# $Basename: Find.pm $ |
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# $Revision: 1.4 $ |
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# Author : Ulrich Pfeifer |
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# Created On : Mon Sep 16 19:04:37 1996 |
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# Last Modified By: Ulrich Pfeifer |
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# Last Modified On: Wed Nov 5 16:50:40 1997 |
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# Language : CPerl |
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# Update Count : 48 |
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# Status : Unknown, Use with caution! |
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# |
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# (C) Copyright 1997, Ulrich Pfeifer, all rights reserved. |
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# |
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# |
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package WAIT::Document::Find; |
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@ISA = qw(WAIT::Document::Base); |
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require WAIT::Document::Base; |
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use FileHandle; |
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use strict; |
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use Carp; |
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sub TIEHASH { |
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my $type = shift; |
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my $pred = shift; |
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my @files = @_; |
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unless (ref($pred) =~ /CODE/) { |
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croak "USAGE: tie %HASH, WAIT::Document::Find, coderef, file, ..."; |
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} |
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my $self = { |
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Pred => $pred, |
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Files => \@files |
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}; |
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bless $self, ref($type) || $type; |
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} |
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sub FETCH { |
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my $self = shift; |
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my $path = shift; |
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return undef unless defined $path; |
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return undef unless -f $path; |
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my $fh = new FileHandle "< $path"; |
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local($/) = undef; |
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<$fh>; |
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} |
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sub FIRSTKEY { |
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my $self = shift; |
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$self->{Pending} = [@{$self->{Files}}]; |
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$self->NEXTKEY; |
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} |
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sub NEXTKEY { |
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my $self = shift; |
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return undef unless @{$self->{Pending}}; |
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my $next = pop @{$self->{Pending}}; |
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while ($next and -f $next) { |
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if (&{$self->{Pred}}($next)) { |
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return $next; |
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} |
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$next = pop @{$self->{Pending}}; |
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} |
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if ($next and -d $next) { |
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push @{$self->{Pending}}, _expand($next); |
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} |
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return $self->NEXTKEY; |
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} |
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sub _expand { |
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my $dir = shift; |
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my @result; |
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return () unless -d $dir; |
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opendir(DIR, $dir) or return (); |
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@result = map "$dir/$_", grep $_ !~ /^\.\.?$/, readdir(DIR); |
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closedir DIR; |
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return @result; |
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} |
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sub close { |
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my $self = shift; |
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delete $self->{Pred}; |
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delete $self->{Pending}; |
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delete $self->{Files}; # no need at query time |
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} |
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1; |