Initial commit.

lib/perl5/Selima/Query.pm

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