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171 lines
3.7 KiB
Perl
171 lines
3.7 KiB
Perl
#
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# Copyright 1999, 2000, 2001 Patrik Stridvall
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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package util;
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use strict;
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use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
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require Exporter;
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@ISA = qw(Exporter);
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@EXPORT = qw(
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&append_file &edit_file &read_file &replace_file
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&normalize_set &is_subset
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);
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@EXPORT_OK = qw();
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%EXPORT_TAGS = ();
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########################################################################
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# _compare_files
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sub _compare_files {
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my $file1 = shift;
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my $file2 = shift;
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local $/ = undef;
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return -1 if !open(IN, "< $file1");
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my $s1 = <IN>;
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close(IN);
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return 1 if !open(IN, "< $file2");
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my $s2 = <IN>;
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close(IN);
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return $s1 cmp $s2;
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}
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########################################################################
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# append_file
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sub append_file {
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my $filename = shift;
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my $function = shift;
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open(OUT, ">> $filename") || die "Can't open file '$filename'";
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my $result = &$function(\*OUT, @_);
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close(OUT);
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return $result;
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}
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########################################################################
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# edit_file
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sub edit_file {
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my $filename = shift;
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my $function = shift;
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open(IN, "< $filename") || die "Can't open file '$filename'";
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open(OUT, "> $filename.tmp") || die "Can't open file '$filename.tmp'";
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my $result = &$function(\*IN, \*OUT, @_);
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close(IN);
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close(OUT);
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if($result) {
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unlink("$filename");
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rename("$filename.tmp", "$filename");
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} else {
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unlink("$filename.tmp");
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}
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return $result;
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}
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########################################################################
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# read_file
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sub read_file {
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my $filename = shift;
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my $function = shift;
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open(IN, "< $filename") || die "Can't open file '$filename'";
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my $result = &$function(\*IN, @_);
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close(IN);
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return $result;
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}
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########################################################################
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# replace_file
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sub replace_file {
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my $filename = shift;
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my $function = shift;
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open(OUT, "> $filename.tmp") || die "Can't open file '$filename.tmp'";
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my $result = &$function(\*OUT, @_);
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close(OUT);
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if($result && _compare_files($filename, "$filename.tmp")) {
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unlink("$filename");
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rename("$filename.tmp", $filename);
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} else {
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unlink("$filename.tmp");
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}
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return $result;
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}
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########################################################################
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# normalize_set
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sub normalize_set {
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local $_ = shift;
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if(!defined($_)) {
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return undef;
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}
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my %hash = ();
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foreach my $key (split(/\s*&\s*/)) {
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$hash{$key}++;
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}
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return join(" & ", sort(keys(%hash)));
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}
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########################################################################
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# is_subset
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sub is_subset {
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my $subset = shift;
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my $set = shift;
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foreach my $subitem (split(/ & /, $subset)) {
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my $match = 0;
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foreach my $item (split(/ & /, $set)) {
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if($subitem eq $item) {
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$match = 1;
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last;
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}
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}
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if(!$match) {
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return 0;
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}
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}
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return 1;
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}
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1;
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