59 lines
1.6 KiB
Perl
59 lines
1.6 KiB
Perl
# Selima Website Content Management System
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# Query.pm: The search string parser.
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# Copyright (c) 2004-2018 imacat.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Author: imacat <imacat@mail.imacat.idv.tw>
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# First written: 2004-09-12
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package Selima::Query;
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use 5.008;
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use strict;
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use warnings;
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use base qw(Exporter);
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use vars qw(@EXPORT @EXPORT_OK);
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BEGIN {
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@EXPORT = qw(parse_query);
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@EXPORT_OK = @EXPORT;
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# Prototype declaration
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sub parse_query($);
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}
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# parse_query: Parse the query string into multiple search phrases
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sub parse_query($) {
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local ($_, %_);
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$_ = $_[0];
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s/^\s*(.*?)\s*$/$1/;
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@_ = qw();
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while ($_ ne "") {
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# Non-quoted word
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if (s/^([^\s"']+)\s*//) { # " gettext
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push @_, $1;
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# Double-quoted string
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} elsif (s/^"((?:[^\\"]|\\.)+)"?\s*//) { # " gettext
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eval "push \@_, \"$1\";\n";
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# Single-quoted string
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} elsif (s/^'((?:[^\\']|\\.)+)'?\s*//) { # ' gettext
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eval "push \@_, '$1';\n";
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# Discard empty quoted strings
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} elsif (s/^(?:""?|''?)\s*//) {
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}
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}
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return @_;
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}
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return 1;
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