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4d2c9470bc
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1564972 13f79535-47bb-0310-9956-ffa450edef68
50 lines
1.7 KiB
XML
50 lines
1.7 KiB
XML
<?xml version="1.0"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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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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-->
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<xsl:stylesheet version="1.0"
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xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
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<!-- O(log(n)) (stack usage!) string reverter -->
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<xsl:template name="string-reverse">
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<xsl:param name="string"/>
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<xsl:variable name="length" select="string-length($string)"/>
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<xsl:choose>
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<xsl:when test="$length < 2">
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<xsl:value-of select="$string"/>
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</xsl:when>
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<xsl:when test="$length = 2">
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<xsl:value-of select="concat(substring($string, 2, 1), substring($string, 1, 1))"/>
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</xsl:when>
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<xsl:otherwise>
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<xsl:variable name="middle" select="floor($length div 2)"/>
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<xsl:call-template name="string-reverse">
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<xsl:with-param name="string" select="substring($string, $middle + 1, $middle + 1)"/>
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</xsl:call-template>
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<xsl:call-template name="string-reverse">
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<xsl:with-param name="string" select="substring($string, 1, $middle)"/>
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</xsl:call-template>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:template>
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<!-- /string-reverse -->
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</xsl:stylesheet>
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