hxt-8.0.0: doc/hdoc/src/Text-XML-HXT-XPath-XPathFct.html
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<pre><a name="line-1"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='comment'>{- |
<a name="line-4"></a> Module : Text.XML.HXT.XPath.XPathFct
<a name="line-5"></a> Copyright : Copyright (C) 2008 Uwe Schmidt
<a name="line-6"></a> License : MIT
<a name="line-7"></a>
<a name="line-8"></a> Maintainer : Uwe Schmidt (uwe@fh-wedel.de)
<a name="line-9"></a> Stability : experimental
<a name="line-10"></a> Portability: portable
<a name="line-11"></a>
<a name="line-12"></a> The module contains the core-functions of the XPath function library.
<a name="line-13"></a> All functions are implemented as XFct. Each XFct contains the evaluation context,
<a name="line-14"></a> the variable environment and the function arguments.
<a name="line-15"></a>
<a name="line-16"></a>-}</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-19"></a>
<a name="line-20"></a><span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathFct</span>
<a name="line-21"></a> <span class='layout'>(</span> <span class='conid'>XFct</span>
<a name="line-22"></a> <span class='layout'>,</span> <span class='varid'>evalFct</span>
<a name="line-23"></a> <span class='layout'>,</span> <span class='varid'>toXValue</span>
<a name="line-24"></a> <span class='layout'>,</span> <span class='varid'>xnumber</span>
<a name="line-25"></a> <span class='layout'>,</span> <span class='varid'>xboolean</span>
<a name="line-26"></a> <span class='layout'>,</span> <span class='varid'>xstring</span>
<a name="line-27"></a> <span class='layout'>,</span> <span class='varid'>getConvFct</span>
<a name="line-28"></a> <span class='layout'>,</span> <span class='varid'>stringValue</span>
<a name="line-29"></a> <span class='layout'>,</span> <span class='varid'>remDups</span>
<a name="line-30"></a> <span class='layout'>,</span> <span class='varid'>isNotInNodeList</span>
<a name="line-31"></a> <span class='layout'>,</span> <span class='varid'>createDocumentOrder</span>
<a name="line-32"></a> <span class='layout'>,</span> <span class='varid'>createDocumentOrderReverse</span>
<a name="line-33"></a> <span class='layout'>,</span> <span class='varid'>getVarTab</span>
<a name="line-34"></a> <span class='layout'>,</span> <span class='varid'>getKeyTab</span>
<a name="line-35"></a> <span class='layout'>)</span>
<a name="line-36"></a><span class='keyword'>where</span>
<a name="line-37"></a>
<a name="line-38"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathDataTypes</span>
<a name="line-39"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathParser</span>
<a name="line-40"></a> <span class='layout'>(</span> <span class='varid'>parseNumber</span>
<a name="line-41"></a> <span class='layout'>)</span>
<a name="line-42"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathArithmetic</span>
<a name="line-43"></a> <span class='layout'>(</span> <span class='varid'>xPathAdd</span>
<a name="line-44"></a> <span class='layout'>)</span>
<a name="line-45"></a>
<a name="line-46"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span> <span class='layout'>(</span> <span class='layout'>(</span><span class='varop'>>>></span><span class='layout'>)</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varop'><+></span><span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-47"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ArrowList</span> <span class='layout'>(</span> <span class='varid'>constA</span> <span class='layout'>)</span>
<a name="line-48"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ArrowIf</span> <span class='layout'>(</span> <span class='varid'>ifA</span> <span class='layout'>)</span>
<a name="line-49"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ArrowTree</span> <span class='layout'>(</span> <span class='varid'>deep</span> <span class='layout'>)</span>
<a name="line-50"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ListArrow</span> <span class='layout'>(</span> <span class='conid'>LA</span><span class='layout'>,</span> <span class='varid'>runLA</span> <span class='layout'>)</span>
<a name="line-51"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>XmlArrow</span>
<a name="line-52"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ReadDocument</span> <span class='layout'>(</span><span class='varid'>readDocument</span><span class='layout'>)</span>
<a name="line-53"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>XmlIOStateArrow</span> <span class='layout'>(</span><span class='varid'>runX</span><span class='layout'>)</span>
<a name="line-54"></a>
<a name="line-55"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>Interface</span>
<a name="line-56"></a><span class='keyword'>import</span> <span class='keyword'>qualified</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>XmlNode</span> <span class='keyword'>as</span> <span class='conid'>XN</span>
<a name="line-57"></a>
<a name="line-58"></a><span class='keyword'>import</span> <span class='conid'>System</span><span class='varop'>.</span><span class='conid'>IO</span><span class='varop'>.</span><span class='conid'>Unsafe</span>
<a name="line-59"></a> <span class='layout'>(</span> <span class='varid'>unsafePerformIO</span>
<a name="line-60"></a> <span class='layout'>)</span>
<a name="line-61"></a>
<a name="line-62"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Char</span>
<a name="line-63"></a> <span class='layout'>(</span> <span class='varid'>isAscii</span>
<a name="line-64"></a> <span class='layout'>,</span> <span class='varid'>isUpper</span>
<a name="line-65"></a> <span class='layout'>,</span> <span class='varid'>isLower</span>
<a name="line-66"></a> <span class='layout'>,</span> <span class='varid'>isDigit</span>
<a name="line-67"></a> <span class='layout'>,</span> <span class='varid'>ord</span>
<a name="line-68"></a> <span class='layout'>)</span>
<a name="line-69"></a>
<a name="line-70"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>List</span>
<a name="line-71"></a> <span class='layout'>(</span> <span class='varid'>sortBy</span>
<a name="line-72"></a> <span class='layout'>)</span>
<a name="line-73"></a>
<a name="line-74"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Maybe</span>
<a name="line-75"></a>
<a name="line-76"></a><span class='comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-77"></a>
<a name="line-78"></a><span class='comment'>-- added by Tim Walkenhorst to fix Pos0 vs. Float 0.0 problems...</span>
<a name="line-79"></a>
<a name="line-80"></a><a name="int2XPNumber"></a><span class='definition'>int2XPNumber</span> <span class='keyglyph'>::</span> <span class='conid'>Int</span> <span class='keyglyph'>-></span> <span class='conid'>XPNumber</span>
<a name="line-81"></a><span class='definition'>int2XPNumber</span> <span class='num'>0</span> <span class='keyglyph'>=</span> <span class='conid'>Pos0</span>
<a name="line-82"></a><span class='definition'>int2XPNumber</span> <span class='varid'>i</span> <span class='keyglyph'>=</span> <span class='conid'>Float</span> <span class='varop'>$</span> <span class='varid'>fromIntegral</span> <span class='varid'>i</span>
<a name="line-83"></a>
<a name="line-84"></a><span class='comment'>-- |</span>
<a name="line-85"></a><span class='comment'>-- Type signature for all functions which can be used in the XPath module.</span>
<a name="line-86"></a>
<a name="line-87"></a><a name="XFct"></a><span class='keyword'>type</span> <span class='conid'>XFct</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='conid'>Context</span> <span class='keyglyph'>-></span> <span class='conid'>Env</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>XPathValue</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>XPathValue</span><span class='layout'>)</span>
<a name="line-88"></a>
<a name="line-89"></a><span class='comment'>-- |</span>
<a name="line-90"></a><span class='comment'>-- All functions are stored in a function table.</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="FctTable"></a><span class='keyword'>type</span> <span class='conid'>FctTable</span> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='conid'>FctName</span><span class='layout'>,</span> <span class='conid'>FctTableElem</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-93"></a>
<a name="line-94"></a><span class='comment'>-- |</span>
<a name="line-95"></a><span class='comment'>-- Each table entry consists of the function and the expected function arguments.</span>
<a name="line-96"></a>
<a name="line-97"></a><a name="FctTableElem"></a><span class='keyword'>type</span> <span class='conid'>FctTableElem</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='conid'>XFct</span><span class='layout'>,</span> <span class='conid'>CheckArgCount</span><span class='layout'>)</span>
<a name="line-98"></a>
<a name="line-99"></a><span class='comment'>-- |</span>
<a name="line-100"></a><span class='comment'>-- Tests whether the number of current function arguments is correct</span>
<a name="line-101"></a>
<a name="line-102"></a><a name="CheckArgCount"></a><span class='keyword'>type</span> <span class='conid'>CheckArgCount</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='keyglyph'>[</span><span class='conid'>XPathValue</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span><span class='layout'>)</span>
<a name="line-103"></a>
<a name="line-104"></a><a name="zero"></a><span class='definition'>zero</span><span class='layout'>,</span> <span class='varid'>zeroOrOne</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>,</span> <span class='varid'>two</span><span class='layout'>,</span> <span class='varid'>twoOrM</span><span class='layout'>,</span> <span class='varid'>twoOrThree</span><span class='layout'>,</span> <span class='varid'>three</span> <span class='keyglyph'>::</span> <span class='conid'>CheckArgCount</span>
<a name="line-105"></a><span class='definition'>zero</span> <span class='varid'>ex</span> <span class='keyglyph'>=</span> <span class='varid'>length</span> <span class='varid'>ex</span> <span class='varop'>==</span> <span class='num'>0</span>
<a name="line-106"></a><a name="zeroOrOne"></a><span class='definition'>zeroOrOne</span> <span class='varid'>ex</span> <span class='keyglyph'>=</span> <span class='varid'>length</span> <span class='varid'>ex</span> <span class='varop'>==</span> <span class='num'>0</span> <span class='varop'>||</span> <span class='varid'>length</span> <span class='varid'>ex</span> <span class='varop'>==</span> <span class='num'>1</span>
<a name="line-107"></a><a name="one"></a><span class='definition'>one</span> <span class='varid'>ex</span> <span class='keyglyph'>=</span> <span class='varid'>length</span> <span class='varid'>ex</span> <span class='varop'>==</span> <span class='num'>1</span>
<a name="line-108"></a><a name="two"></a><span class='definition'>two</span> <span class='varid'>ex</span> <span class='keyglyph'>=</span> <span class='varid'>length</span> <span class='varid'>ex</span> <span class='varop'>==</span> <span class='num'>2</span>
<a name="line-109"></a><a name="twoOrM"></a><span class='definition'>twoOrM</span> <span class='varid'>ex</span> <span class='keyglyph'>=</span> <span class='varid'>length</span> <span class='varid'>ex</span> <span class='varop'>>=</span> <span class='num'>2</span>
<a name="line-110"></a><a name="twoOrThree"></a><span class='definition'>twoOrThree</span> <span class='varid'>ex</span> <span class='keyglyph'>=</span> <span class='varid'>length</span> <span class='varid'>ex</span> <span class='varop'>==</span> <span class='num'>2</span> <span class='varop'>||</span> <span class='varid'>length</span> <span class='varid'>ex</span> <span class='varop'>==</span> <span class='num'>3</span>
<a name="line-111"></a><a name="three"></a><span class='definition'>three</span> <span class='varid'>ex</span> <span class='keyglyph'>=</span> <span class='varid'>length</span> <span class='varid'>ex</span> <span class='varop'>==</span> <span class='num'>3</span>
<a name="line-112"></a>
<a name="line-113"></a>
<a name="line-114"></a><span class='comment'>-- |</span>
<a name="line-115"></a><span class='comment'>-- The core-functions library</span>
<a name="line-116"></a>
<a name="line-117"></a><a name="fctTable"></a><span class='definition'>fctTable</span> <span class='keyglyph'>::</span> <span class='conid'>FctTable</span>
<a name="line-118"></a><span class='definition'>fctTable</span> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span>
<a name="line-119"></a> <span class='layout'>(</span><span class='str'>"last"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xlast</span><span class='layout'>,</span> <span class='varid'>zero</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span> <span class='comment'>-- nodeset functions</span>
<a name="line-120"></a> <span class='layout'>(</span><span class='str'>"position"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xposition</span><span class='layout'>,</span> <span class='varid'>zero</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-121"></a> <span class='layout'>(</span><span class='str'>"count"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xcount</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-122"></a> <span class='layout'>(</span><span class='str'>"id"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xid</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-123"></a> <span class='layout'>(</span><span class='str'>"local-name"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xlocalName</span><span class='layout'>,</span> <span class='varid'>zeroOrOne</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-124"></a> <span class='layout'>(</span><span class='str'>"namespace-uri"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xnamespaceUri</span><span class='layout'>,</span> <span class='varid'>zeroOrOne</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-125"></a> <span class='layout'>(</span><span class='str'>"name"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xname</span><span class='layout'>,</span> <span class='varid'>zeroOrOne</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-126"></a>
<a name="line-127"></a> <span class='layout'>(</span><span class='str'>"string"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xstring</span><span class='layout'>,</span> <span class='varid'>zeroOrOne</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span> <span class='comment'>-- string functions</span>
<a name="line-128"></a> <span class='layout'>(</span><span class='str'>"concat"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xconcat</span><span class='layout'>,</span> <span class='varid'>twoOrM</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-129"></a> <span class='layout'>(</span><span class='str'>"starts-with"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xstartsWith</span><span class='layout'>,</span> <span class='varid'>two</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-130"></a> <span class='layout'>(</span><span class='str'>"contains"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xcontains</span><span class='layout'>,</span> <span class='varid'>two</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-131"></a> <span class='layout'>(</span><span class='str'>"substring-before"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xsubstringBefore</span><span class='layout'>,</span> <span class='varid'>two</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-132"></a> <span class='layout'>(</span><span class='str'>"substring-after"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xsubstringAfter</span><span class='layout'>,</span> <span class='varid'>two</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-133"></a> <span class='layout'>(</span><span class='str'>"substring"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xsubstring</span><span class='layout'>,</span> <span class='varid'>twoOrThree</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-134"></a> <span class='layout'>(</span><span class='str'>"string-length"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xstringLength</span><span class='layout'>,</span> <span class='varid'>zeroOrOne</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-135"></a> <span class='layout'>(</span><span class='str'>"normalize-space"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xnormalizeSpace</span><span class='layout'>,</span> <span class='varid'>zeroOrOne</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-136"></a> <span class='layout'>(</span><span class='str'>"translate"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xtranslate</span><span class='layout'>,</span> <span class='varid'>three</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-137"></a>
<a name="line-138"></a> <span class='layout'>(</span><span class='str'>"boolean"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xboolean</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span> <span class='comment'>-- boolean functions</span>
<a name="line-139"></a> <span class='layout'>(</span><span class='str'>"not"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xnot</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-140"></a> <span class='layout'>(</span><span class='str'>"true"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xtrue</span><span class='layout'>,</span> <span class='varid'>zero</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-141"></a> <span class='layout'>(</span><span class='str'>"false"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xfalse</span><span class='layout'>,</span> <span class='varid'>zero</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-142"></a> <span class='layout'>(</span><span class='str'>"lang"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xlang</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-143"></a>
<a name="line-144"></a> <span class='layout'>(</span><span class='str'>"number"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xnumber</span><span class='layout'>,</span> <span class='varid'>zeroOrOne</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span> <span class='comment'>-- number functions</span>
<a name="line-145"></a> <span class='layout'>(</span><span class='str'>"sum"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xsum</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-146"></a> <span class='layout'>(</span><span class='str'>"floor"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xfloor</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-147"></a> <span class='layout'>(</span><span class='str'>"ceiling"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xceiling</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-148"></a> <span class='layout'>(</span><span class='str'>"round"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xround</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-149"></a> <span class='layout'>(</span><span class='str'>"key"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xkey</span><span class='layout'>,</span> <span class='varid'>two</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-150"></a> <span class='layout'>(</span><span class='str'>"format-number"</span><span class='layout'>,</span><span class='layout'>(</span><span class='varid'>xformatNumber</span><span class='layout'>,</span> <span class='varid'>twoOrThree</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span>
<a name="line-151"></a>
<a name="line-152"></a> <span class='layout'>(</span><span class='str'>"document"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xdocument</span><span class='layout'>,</span> <span class='varid'>one</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>,</span><span class='comment'>-- extension functions for xslt 1.0</span>
<a name="line-153"></a> <span class='layout'>(</span><span class='str'>"generate-id"</span><span class='layout'>,</span> <span class='layout'>(</span><span class='varid'>xgenerateId</span><span class='layout'>,</span> <span class='varid'>zeroOrOne</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-154"></a>
<a name="line-155"></a> <span class='keyglyph'>]</span>
<a name="line-156"></a>
<a name="line-157"></a><span class='comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-158"></a>
<a name="line-159"></a><span class='comment'>-- some helper functions</span>
<a name="line-160"></a>
<a name="line-161"></a><span class='comment'>-- |</span>
<a name="line-162"></a><span class='comment'>-- Returns the table of keys, needed by xslt, from the environment</span>
<a name="line-163"></a>
<a name="line-164"></a><a name="getKeyTab"></a><span class='definition'>getKeyTab</span> <span class='keyglyph'>::</span> <span class='conid'>Env</span> <span class='keyglyph'>-></span> <span class='conid'>KeyTab</span>
<a name="line-165"></a><span class='definition'>getKeyTab</span> <span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>keyTab</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>keyTab</span>
<a name="line-166"></a>
<a name="line-167"></a>
<a name="line-168"></a><span class='comment'>-- |</span>
<a name="line-169"></a><span class='comment'>-- Returns the table of variables from the environment</span>
<a name="line-170"></a>
<a name="line-171"></a><a name="getVarTab"></a><span class='definition'>getVarTab</span> <span class='keyglyph'>::</span> <span class='conid'>Env</span> <span class='keyglyph'>-></span> <span class='conid'>VarTab</span>
<a name="line-172"></a><span class='definition'>getVarTab</span> <span class='layout'>(</span><span class='varid'>varTab</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>varTab</span>
<a name="line-173"></a>
<a name="line-174"></a>
<a name="line-175"></a><span class='comment'>-- |</span>
<a name="line-176"></a><span class='comment'>-- Returns the conversion function for the XPath results: string, boolean and number</span>
<a name="line-177"></a><span class='comment'>-- A nodeset can not be converted.</span>
<a name="line-178"></a>
<a name="line-179"></a><a name="getConvFct"></a><span class='definition'>getConvFct</span> <span class='keyglyph'>::</span> <span class='conid'>XPathValue</span> <span class='keyglyph'>-></span> <span class='conid'>Maybe</span> <span class='conid'>XFct</span>
<a name="line-180"></a><span class='definition'>getConvFct</span> <span class='layout'>(</span><span class='conid'>XPVNumber</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>Just</span> <span class='varid'>xnumber</span>
<a name="line-181"></a><span class='definition'>getConvFct</span> <span class='layout'>(</span><span class='conid'>XPVString</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>Just</span> <span class='varid'>xstring</span>
<a name="line-182"></a><span class='definition'>getConvFct</span> <span class='layout'>(</span><span class='conid'>XPVBool</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>Just</span> <span class='varid'>xboolean</span>
<a name="line-183"></a><span class='definition'>getConvFct</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>Nothing</span>
<a name="line-184"></a>
<a name="line-185"></a>
<a name="line-186"></a><span class='comment'>-- |</span>
<a name="line-187"></a><span class='comment'>-- Filter for ordering a list of Nodes in document order</span>
<a name="line-188"></a>
<a name="line-189"></a><a name="createDocumentOrder"></a><span class='definition'>createDocumentOrder</span> <span class='keyglyph'>::</span> <span class='conid'>XPathFilter</span>
<a name="line-190"></a><span class='definition'>createDocumentOrder</span> <span class='layout'>(</span><span class='conid'>XPVNode</span> <span class='varid'>n</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNode</span> <span class='layout'>(</span><span class='varid'>sortBy</span> <span class='varid'>documentOrder</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-191"></a> <span class='keyword'>where</span>
<a name="line-192"></a> <span class='varid'>documentOrder</span> <span class='keyglyph'>::</span> <span class='conid'>NavXmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>NavXmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>Ordering</span>
<a name="line-193"></a> <span class='varid'>documentOrder</span> <span class='varid'>a</span> <span class='varid'>b</span> <span class='keyglyph'>=</span> <span class='varid'>compare</span> <span class='layout'>(</span><span class='varid'>documentPos</span> <span class='varid'>a</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>documentPos</span> <span class='varid'>b</span><span class='layout'>)</span>
<a name="line-194"></a>
<a name="line-195"></a><span class='definition'>createDocumentOrder</span> <span class='varid'>e</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>XPVError</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>e</span>
<a name="line-196"></a><span class='definition'>createDocumentOrder</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to createDocumentOrder without a nodeset"</span>
<a name="line-197"></a>
<a name="line-198"></a>
<a name="line-199"></a><span class='comment'>-- |</span>
<a name="line-200"></a><span class='comment'>-- Filter for ordering a list of Nodes in reverse document order</span>
<a name="line-201"></a>
<a name="line-202"></a><a name="createDocumentOrderReverse"></a><span class='definition'>createDocumentOrderReverse</span> <span class='keyglyph'>::</span> <span class='conid'>XPathFilter</span>
<a name="line-203"></a><span class='definition'>createDocumentOrderReverse</span> <span class='layout'>(</span><span class='conid'>XPVNode</span> <span class='varid'>n</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNode</span> <span class='layout'>(</span><span class='varid'>sortBy</span> <span class='varid'>documentOrderReverse</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-204"></a> <span class='keyword'>where</span>
<a name="line-205"></a> <span class='varid'>documentOrderReverse</span> <span class='keyglyph'>::</span> <span class='conid'>NavXmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>NavXmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>Ordering</span>
<a name="line-206"></a> <span class='varid'>documentOrderReverse</span> <span class='varid'>a</span> <span class='varid'>b</span> <span class='keyglyph'>=</span> <span class='varid'>compare</span> <span class='layout'>(</span><span class='varid'>documentPos</span> <span class='varid'>b</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>documentPos</span> <span class='varid'>a</span><span class='layout'>)</span>
<a name="line-207"></a>
<a name="line-208"></a><span class='definition'>createDocumentOrderReverse</span> <span class='varid'>e</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>XPVError</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>e</span>
<a name="line-209"></a><span class='definition'>createDocumentOrderReverse</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to createDocumentOrderReverse without a nodeset"</span>
<a name="line-210"></a>
<a name="line-211"></a><span class='comment'>-- |</span>
<a name="line-212"></a><span class='comment'>-- Filter for removing identical fragment trees in a nodeset</span>
<a name="line-213"></a>
<a name="line-214"></a><a name="remDups"></a><span class='definition'>remDups</span> <span class='keyglyph'>::</span> <span class='conid'>XPathFilter</span>
<a name="line-215"></a><span class='definition'>remDups</span> <span class='varid'>e</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>XPVError</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>e</span>
<a name="line-216"></a><span class='definition'>remDups</span> <span class='layout'>(</span><span class='conid'>XPVNode</span> <span class='conid'>[]</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNode</span> <span class='conid'>[]</span>
<a name="line-217"></a><span class='definition'>remDups</span> <span class='layout'>(</span><span class='conid'>XPVNode</span> <span class='layout'>(</span><span class='varid'>x</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-218"></a> <span class='keyglyph'>|</span> <span class='varid'>isNotInNodeList</span> <span class='varid'>x</span> <span class='varid'>xs</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNode</span> <span class='layout'>(</span><span class='varid'>x</span> <span class='conop'>:</span> <span class='varid'>y</span><span class='layout'>)</span>
<a name="line-219"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>remDups</span> <span class='layout'>(</span><span class='conid'>XPVNode</span> <span class='varid'>xs</span><span class='layout'>)</span>
<a name="line-220"></a> <span class='keyword'>where</span>
<a name="line-221"></a> <span class='layout'>(</span><span class='conid'>XPVNode</span> <span class='varid'>y</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>remDups</span> <span class='layout'>(</span><span class='conid'>XPVNode</span> <span class='varid'>xs</span><span class='layout'>)</span>
<a name="line-222"></a><span class='definition'>remDups</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to remDups without a nodeset"</span>
<a name="line-223"></a>
<a name="line-224"></a><span class='comment'>-- |</span>
<a name="line-225"></a><span class='comment'>-- Check whether a node is not a part of a node list. Needed to implement matching & testing in xslt.</span>
<a name="line-226"></a>
<a name="line-227"></a><a name="isNotInNodeList"></a><span class='definition'>isNotInNodeList</span> <span class='keyglyph'>::</span> <span class='conid'>NavXmlTree</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>NavXmlTree</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-228"></a><span class='definition'>isNotInNodeList</span> <span class='varid'>n</span> <span class='varid'>xs'</span> <span class='keyglyph'>=</span> <span class='varid'>nodeID</span> <span class='layout'>(</span><span class='conid'>Just</span> <span class='varid'>n</span><span class='layout'>)</span> <span class='varop'>`notElem`</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>nodeID</span> <span class='varop'>.</span> <span class='conid'>Just</span><span class='layout'>)</span> <span class='varid'>xs'</span>
<a name="line-229"></a>
<a name="line-230"></a>
<a name="line-231"></a><span class='comment'>-- |</span>
<a name="line-232"></a><span class='comment'>-- calculate an ID for a NODE</span>
<a name="line-233"></a><span class='comment'>--</span>
<a name="line-234"></a><span class='comment'>-- - returns : a list of numbers, one number for each level of the tree</span>
<a name="line-235"></a>
<a name="line-236"></a><span class='comment'>-- Tim Walkenhorst:</span>
<a name="line-237"></a><span class='comment'>-- - Attributes are identified by their QName (they do not have previous siblings)</span>
<a name="line-238"></a><span class='comment'>-- - Elements are identified by their relative position (# of previous siblings)</span>
<a name="line-239"></a>
<a name="line-240"></a><a name="IdPathStep"></a><span class='keyword'>data</span> <span class='conid'>IdPathStep</span> <span class='keyglyph'>=</span> <span class='conid'>IdRoot</span> <span class='conid'>String</span> <span class='keyglyph'>|</span> <span class='conid'>IdPos</span> <span class='conid'>Int</span> <span class='keyglyph'>|</span> <span class='conid'>IdAttr</span> <span class='conid'>QName</span> <span class='keyword'>deriving</span> <span class='layout'>(</span><span class='conid'>Show</span><span class='layout'>,</span> <span class='conid'>Eq</span><span class='layout'>,</span> <span class='conid'>Ord</span><span class='layout'>)</span>
<a name="line-241"></a>
<a name="line-242"></a><a name="nodeID"></a><span class='definition'>nodeID</span> <span class='keyglyph'>::</span> <span class='conid'>Maybe</span> <span class='layout'>(</span><span class='conid'>NavXmlTree</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>IdPathStep</span><span class='keyglyph'>]</span>
<a name="line-243"></a><span class='definition'>nodeID</span> <span class='conid'>Nothing</span> <span class='keyglyph'>=</span> <span class='conid'>[]</span>
<a name="line-244"></a><span class='definition'>nodeID</span> <span class='layout'>(</span><span class='conid'>Just</span> <span class='varid'>t</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NT</span> <span class='layout'>(</span><span class='conid'>NTree</span> <span class='layout'>(</span><span class='conid'>XAttr</span> <span class='varid'>qn</span><span class='layout'>)</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>IdAttr</span> <span class='varid'>qn</span> <span class='conop'>:</span> <span class='varid'>nodeID</span> <span class='layout'>(</span><span class='varid'>upNT</span> <span class='varid'>t</span><span class='layout'>)</span>
<a name="line-245"></a><span class='definition'>nodeID</span> <span class='layout'>(</span><span class='conid'>Just</span> <span class='varid'>t</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NT</span> <span class='varid'>node</span> <span class='keyword'>_</span> <span class='varid'>prev</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-246"></a> <span class='keyglyph'>|</span> <span class='conid'>XN</span><span class='varop'>.</span><span class='varid'>isRoot</span> <span class='varid'>node</span>
<a name="line-247"></a> <span class='keyglyph'>=</span> <span class='varid'>return</span> <span class='varop'>$</span> <span class='conid'>IdRoot</span> <span class='layout'>(</span><span class='varid'>getRootId</span> <span class='varid'>node</span><span class='layout'>)</span>
<a name="line-248"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-249"></a> <span class='keyglyph'>=</span> <span class='conid'>IdPos</span> <span class='layout'>(</span><span class='varid'>length</span> <span class='varid'>prev</span><span class='layout'>)</span> <span class='conop'>:</span> <span class='varid'>nodeID</span> <span class='layout'>(</span><span class='varid'>upNT</span> <span class='varid'>t</span><span class='layout'>)</span>
<a name="line-250"></a> <span class='keyword'>where</span>
<a name="line-251"></a> <span class='varid'>getRootId</span> <span class='keyglyph'>=</span> <span class='varid'>concat</span> <span class='varop'>.</span> <span class='varid'>runLA</span> <span class='layout'>(</span><span class='varid'>getAttrValue</span> <span class='str'>"rootId"</span><span class='layout'>)</span>
<a name="line-252"></a>
<a name="line-253"></a><span class='comment'>-- |</span>
<a name="line-254"></a><span class='comment'>-- Calculates the position of a node in a tree (in document order)</span>
<a name="line-255"></a>
<a name="line-256"></a><a name="documentPos"></a><span class='definition'>documentPos</span> <span class='keyglyph'>::</span> <span class='conid'>NavXmlTree</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>IdPathStep</span><span class='keyglyph'>]</span>
<a name="line-257"></a><span class='definition'>documentPos</span> <span class='varid'>tree</span> <span class='keyglyph'>=</span> <span class='varid'>reverse</span> <span class='varop'>$</span> <span class='varid'>nodeID</span> <span class='layout'>(</span><span class='conid'>Just</span> <span class='varid'>tree</span><span class='layout'>)</span>
<a name="line-258"></a>
<a name="line-259"></a>
<a name="line-260"></a><span class='comment'>-- |</span>
<a name="line-261"></a><span class='comment'>-- Evaluates a function.</span>
<a name="line-262"></a><span class='comment'>-- Calculation of the function value is done by looking up the function name in the function table,</span>
<a name="line-263"></a><span class='comment'>-- check the number of arguments and calculate the funtion, if no</span>
<a name="line-264"></a><span class='comment'>-- argument evaluation returns an error.</span>
<a name="line-265"></a><span class='comment'>--</span>
<a name="line-266"></a><span class='comment'>-- - returns : the function value as 'XPathValue'</span>
<a name="line-267"></a>
<a name="line-268"></a><a name="evalFct"></a><span class='definition'>evalFct</span> <span class='keyglyph'>::</span> <span class='conid'>FctName</span> <span class='keyglyph'>-></span> <span class='conid'>Env</span> <span class='keyglyph'>-></span> <span class='conid'>Context</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>XPathValue</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>XPathValue</span>
<a name="line-269"></a><span class='definition'>evalFct</span> <span class='varid'>name</span> <span class='varid'>env</span> <span class='varid'>cont</span> <span class='varid'>args</span>
<a name="line-270"></a> <span class='keyglyph'>=</span> <span class='keyword'>case</span> <span class='layout'>(</span><span class='varid'>lookup</span> <span class='varid'>name</span> <span class='varid'>fctTable</span><span class='layout'>)</span> <span class='keyword'>of</span>
<a name="line-271"></a> <span class='conid'>Nothing</span> <span class='keyglyph'>-></span> <span class='conid'>XPVError</span> <span class='layout'>(</span><span class='str'>"Call to undefined function "</span><span class='varop'>++</span> <span class='varid'>name</span><span class='layout'>)</span>
<a name="line-272"></a> <span class='conid'>Just</span> <span class='layout'>(</span><span class='varid'>fct</span><span class='layout'>,</span> <span class='varid'>checkArgCount</span><span class='layout'>)</span> <span class='keyglyph'>-></span>
<a name="line-273"></a> <span class='keyword'>if</span> <span class='varid'>not</span> <span class='layout'>(</span><span class='varid'>checkArgCount</span> <span class='varid'>args</span><span class='layout'>)</span>
<a name="line-274"></a> <span class='keyword'>then</span> <span class='conid'>XPVError</span> <span class='layout'>(</span><span class='str'>"Call to function "</span><span class='varop'>++</span> <span class='varid'>name</span> <span class='varop'>++</span> <span class='str'>" with wrong arguments"</span><span class='layout'>)</span>
<a name="line-275"></a> <span class='keyword'>else</span> <span class='keyword'>case</span> <span class='layout'>(</span><span class='varid'>checkArgErrors</span> <span class='varid'>args</span><span class='layout'>)</span> <span class='keyword'>of</span>
<a name="line-276"></a> <span class='conid'>Just</span> <span class='varid'>e</span> <span class='keyglyph'>-></span> <span class='varid'>e</span>
<a name="line-277"></a> <span class='conid'>Nothing</span> <span class='keyglyph'>-></span> <span class='varid'>fct</span> <span class='varid'>cont</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-278"></a> <span class='keyword'>where</span>
<a name="line-279"></a> <span class='varid'>checkArgErrors</span> <span class='conid'>[]</span> <span class='keyglyph'>=</span> <span class='conid'>Nothing</span>
<a name="line-280"></a> <span class='varid'>checkArgErrors</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVError</span> <span class='varid'>r</span><span class='layout'>)</span><span class='conop'>:</span><span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>Just</span> <span class='layout'>(</span><span class='conid'>XPVError</span> <span class='varid'>r</span><span class='layout'>)</span>
<a name="line-281"></a> <span class='varid'>checkArgErrors</span> <span class='layout'>(</span><span class='keyword'>_</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>checkArgErrors</span> <span class='varid'>xs</span>
<a name="line-282"></a>
<a name="line-283"></a>
<a name="line-284"></a><span class='comment'>-- |</span>
<a name="line-285"></a><span class='comment'>-- Converts a list of different 'XPathValue' types in a list of one 'XPathValue' type.</span>
<a name="line-286"></a><span class='comment'>--</span>
<a name="line-287"></a><span class='comment'>-- * 1.parameter fct : the conversion function</span>
<a name="line-288"></a><span class='comment'>--</span>
<a name="line-289"></a>
<a name="line-290"></a><a name="toXValue"></a><span class='definition'>toXValue</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span> <span class='keyglyph'>-></span> <span class='conid'>Context</span> <span class='keyglyph'>-></span> <span class='conid'>Env</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>XPathValue</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>XPathValue</span><span class='keyglyph'>]</span>
<a name="line-291"></a><span class='definition'>toXValue</span> <span class='varid'>fct</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span><span class='varid'>fct</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='varid'>x</span><span class='keyglyph'>]</span> <span class='keyglyph'>|</span> <span class='varid'>x</span> <span class='keyglyph'><-</span> <span class='varid'>args</span><span class='keyglyph'>]</span>
<a name="line-292"></a>
<a name="line-293"></a>
<a name="line-294"></a><span class='comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-295"></a><span class='comment'>-- core-funktions library</span>
<a name="line-296"></a>
<a name="line-297"></a><span class='comment'>-- nodeset functions</span>
<a name="line-298"></a>
<a name="line-299"></a><span class='comment'>-- |</span>
<a name="line-300"></a><span class='comment'>-- number last(): returns a number equal to the context size from the expression evaluation context</span>
<a name="line-301"></a>
<a name="line-302"></a><a name="xlast"></a><span class='definition'>xlast</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-303"></a><span class='definition'>xlast</span> <span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>len</span> <span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='varop'>$</span> <span class='varid'>int2XPNumber</span> <span class='varid'>len</span>
<a name="line-304"></a>
<a name="line-305"></a>
<a name="line-306"></a><span class='comment'>-- |</span>
<a name="line-307"></a><span class='comment'>-- number position(): returns a number equal to the context position from the expression evaluation context</span>
<a name="line-308"></a>
<a name="line-309"></a><a name="xposition"></a><span class='definition'>xposition</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-310"></a><span class='definition'>xposition</span> <span class='layout'>(</span><span class='varid'>pos</span><span class='layout'>,</span> <span class='keyword'>_</span> <span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='varop'>$</span> <span class='varid'>int2XPNumber</span> <span class='varid'>pos</span>
<a name="line-311"></a>
<a name="line-312"></a>
<a name="line-313"></a><span class='comment'>-- |</span>
<a name="line-314"></a><span class='comment'>-- number count(node-set): returns the number of nodes in the argument node-set</span>
<a name="line-315"></a>
<a name="line-316"></a><a name="xcount"></a><span class='definition'>xcount</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-317"></a><span class='definition'>xcount</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='varid'>ns</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='varop'>$</span> <span class='varid'>int2XPNumber</span> <span class='varop'>$</span> <span class='varid'>length</span> <span class='varid'>ns</span>
<a name="line-318"></a><span class='definition'>xcount</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to function count with wrong arguments"</span>
<a name="line-319"></a>
<a name="line-320"></a>
<a name="line-321"></a><span class='comment'>-- |</span>
<a name="line-322"></a><span class='comment'>-- node-set id(object): selects elements by their unique ID</span>
<a name="line-323"></a>
<a name="line-324"></a><a name="xid"></a><span class='definition'>xid</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-325"></a><span class='definition'>xid</span> <span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>cn</span><span class='layout'>)</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='varid'>ns</span><span class='keyglyph'>]</span>
<a name="line-326"></a> <span class='keyglyph'>=</span> <span class='varid'>isInId</span> <span class='layout'>(</span><span class='varid'>getIds</span> <span class='varid'>env</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>strValues</span> <span class='varid'>ns</span><span class='layout'>)</span> <span class='keyglyph'>[</span><span class='varid'>cn</span><span class='keyglyph'>]</span>
<a name="line-327"></a> <span class='keyword'>where</span>
<a name="line-328"></a> <span class='varid'>strValues</span> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='layout'>(</span><span class='keyglyph'>\</span> <span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>str</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>str</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>stringValue</span><span class='layout'>)</span>
<a name="line-329"></a>
<a name="line-330"></a><span class='definition'>xid</span> <span class='varid'>c</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>cn</span><span class='layout'>)</span> <span class='varid'>env</span> <span class='varid'>arg</span>
<a name="line-331"></a> <span class='keyglyph'>=</span> <span class='varid'>isInId</span> <span class='layout'>(</span><span class='varid'>getIds</span> <span class='varid'>env</span><span class='layout'>)</span> <span class='layout'>(</span> <span class='layout'>(</span><span class='keyglyph'>\</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>words</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>arg</span><span class='layout'>)</span><span class='layout'>)</span> <span class='keyglyph'>[</span><span class='varid'>cn</span><span class='keyglyph'>]</span>
<a name="line-332"></a>
<a name="line-333"></a>
<a name="line-334"></a>
<a name="line-335"></a><span class='comment'>-- |</span>
<a name="line-336"></a><span class='comment'>-- returns all IDs from the variable environment as a list of strings.</span>
<a name="line-337"></a><span class='comment'>-- the IDs are stored in the variable: idAttr</span>
<a name="line-338"></a>
<a name="line-339"></a><a name="getIds"></a><span class='definition'>getIds</span> <span class='keyglyph'>::</span> <span class='conid'>Env</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span>
<a name="line-340"></a><span class='definition'>getIds</span> <span class='varid'>env</span>
<a name="line-341"></a><span class='comment'>-- hier muss noch auf prefix getestet werden</span>
<a name="line-342"></a> <span class='keyglyph'>=</span> <span class='varid'>words</span> <span class='varop'>$</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>str</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>str</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>fromJust</span> <span class='varop'>$</span> <span class='varid'>lookup</span> <span class='layout'>(</span><span class='str'>""</span><span class='layout'>,</span> <span class='str'>"idAttr"</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>getVarTab</span> <span class='varid'>env</span>
<a name="line-343"></a>
<a name="line-344"></a>
<a name="line-345"></a><a name="isInId"></a><span class='definition'>isInId</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>NavXmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XPathValue</span>
<a name="line-346"></a><span class='definition'>isInId</span> <span class='varid'>ids</span> <span class='varid'>str</span> <span class='varid'>ns</span>
<a name="line-347"></a> <span class='keyglyph'>=</span> <span class='varid'>remDups</span> <span class='layout'>(</span><span class='conid'>XPVNode</span> <span class='layout'>(</span><span class='varid'>concat</span> <span class='varop'>$</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>filterNS</span> <span class='varid'>ids</span> <span class='varid'>str</span> <span class='varop'>.</span> <span class='varid'>descendantOrSelfAxis</span><span class='layout'>)</span> <span class='varid'>ns</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-348"></a>
<a name="line-349"></a>
<a name="line-350"></a><a name="filterNS"></a><span class='definition'>filterNS</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>NavXmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>NavXmlTrees</span>
<a name="line-351"></a><span class='definition'>filterNS</span> <span class='varid'>ids</span> <span class='varid'>str</span> <span class='varid'>ns</span>
<a name="line-352"></a> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span> <span class='varid'>n</span> <span class='keyglyph'>|</span> <span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NT</span> <span class='varid'>a</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>NTree</span> <span class='keyword'>_</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'><-</span> <span class='varid'>ns</span><span class='layout'>,</span> <span class='varid'>or</span> <span class='varop'>$</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>idInIdList</span> <span class='varid'>a</span> <span class='varid'>str</span><span class='layout'>)</span> <span class='varid'>ids</span><span class='keyglyph'>]</span>
<a name="line-353"></a> <span class='keyword'>where</span>
<a name="line-354"></a> <span class='varid'>idInIdList</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-355"></a> <span class='varid'>idInIdList</span> <span class='varid'>al</span> <span class='varid'>str'</span> <span class='varid'>b</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>getValue</span> <span class='varid'>b</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>`elem`</span> <span class='varid'>str'</span>
<a name="line-356"></a>
<a name="line-357"></a>
<a name="line-358"></a><span class='comment'>-- |</span>
<a name="line-359"></a><span class='comment'>-- string local-name(node-set?):</span>
<a name="line-360"></a><span class='comment'>-- returns the local part of the expanded-name of the node in the argument node-set</span>
<a name="line-361"></a><span class='comment'>-- that is first in document order. </span>
<a name="line-362"></a><span class='comment'>-- If the argument node-set is empty or the first node has no expanded-name, an empty string is returned. </span>
<a name="line-363"></a><span class='comment'>-- If the argument is omitted, it defaults to a node-set with the context node as its only member</span>
<a name="line-364"></a>
<a name="line-365"></a><span class='comment'>-- Bugfix: name(\/) is "" not "\/"!</span>
<a name="line-366"></a>
<a name="line-367"></a><a name="xlocalName"></a><span class='definition'>xlocalName</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-368"></a><span class='definition'>xlocalName</span> <span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>cn</span><span class='layout'>)</span> <span class='keyword'>_</span> <span class='conid'>[]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>xpLocalPartOf</span> <span class='varop'>$</span> <span class='varid'>subtreeNT</span> <span class='varid'>cn</span><span class='layout'>)</span>
<a name="line-369"></a><span class='definition'>xlocalName</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='conid'>[]</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='str'>""</span>
<a name="line-370"></a><span class='definition'>xlocalName</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='varid'>ns</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>xpLocalPartOf</span> <span class='varop'>$</span> <span class='varid'>subtreeNT</span> <span class='varop'>$</span> <span class='varid'>head</span> <span class='varop'>$</span> <span class='varid'>ns</span><span class='layout'>)</span>
<a name="line-371"></a><span class='definition'>xlocalName</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to function local-name with wrong arguments"</span>
<a name="line-372"></a>
<a name="line-373"></a><span class='comment'>-- |</span>
<a name="line-374"></a><span class='comment'>-- string namespace-uri(node-set?):</span>
<a name="line-375"></a><span class='comment'>-- returns the namespace URI of the expanded-name of the node in the argument node-set</span>
<a name="line-376"></a><span class='comment'>-- that is first in document order.</span>
<a name="line-377"></a><span class='comment'>-- If the argument node-set is empty, the first node has no expanded-name,</span>
<a name="line-378"></a><span class='comment'>-- or the namespace URI of the expanded-name</span>
<a name="line-379"></a><span class='comment'>-- is null, an empty string is returned. If the argument is omitted,</span>
<a name="line-380"></a><span class='comment'>-- it defaults to a node-set with the context node as its only member</span>
<a name="line-381"></a>
<a name="line-382"></a><a name="xnamespaceUri"></a><span class='definition'>xnamespaceUri</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-383"></a><span class='definition'>xnamespaceUri</span> <span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>cn</span><span class='layout'>)</span> <span class='keyword'>_</span> <span class='conid'>[]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>xpNamespaceOf</span> <span class='varop'>$</span> <span class='varid'>subtreeNT</span> <span class='varid'>cn</span><span class='layout'>)</span>
<a name="line-384"></a><span class='definition'>xnamespaceUri</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='conid'>[]</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='str'>""</span>
<a name="line-385"></a><span class='definition'>xnamespaceUri</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='varid'>ns</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>xpNamespaceOf</span> <span class='varop'>$</span> <span class='varid'>subtreeNT</span> <span class='varop'>$</span> <span class='varid'>head</span> <span class='varop'>$</span> <span class='varid'>ns</span><span class='layout'>)</span>
<a name="line-386"></a><span class='definition'>xnamespaceUri</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to function namespace-uri with wrong arguments"</span>
<a name="line-387"></a>
<a name="line-388"></a>
<a name="line-389"></a><span class='comment'>-- |</span>
<a name="line-390"></a><span class='comment'>-- string name(node-set?): </span>
<a name="line-391"></a><span class='comment'>-- returns a string containing a QName representing the expanded-name of the node</span>
<a name="line-392"></a><span class='comment'>-- in the argument node-set </span>
<a name="line-393"></a><span class='comment'>-- that is first in document order. If the argument node-set is empty or the first</span>
<a name="line-394"></a><span class='comment'>-- node has no expanded-name, </span>
<a name="line-395"></a><span class='comment'>-- an empty string is returned. If the argument it omitted, it defaults to a node-set</span>
<a name="line-396"></a><span class='comment'>-- with the context node as its only member.</span>
<a name="line-397"></a><span class='comment'>-- Tim Walkenhorst: </span>
<a name="line-398"></a>
<a name="line-399"></a><span class='comment'>-- Bugfix: name(\/) is "" not "\/"!</span>
<a name="line-400"></a>
<a name="line-401"></a><a name="xname"></a><span class='definition'>xname</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-402"></a><span class='definition'>xname</span> <span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>cn</span><span class='layout'>)</span> <span class='keyword'>_</span> <span class='conid'>[]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>xpNameOf</span> <span class='varop'>$</span> <span class='varid'>subtreeNT</span> <span class='varid'>cn</span><span class='layout'>)</span>
<a name="line-403"></a><span class='definition'>xname</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='conid'>[]</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='str'>""</span>
<a name="line-404"></a><span class='definition'>xname</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='varid'>ns</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>xpNameOf</span> <span class='varop'>$</span> <span class='varid'>subtreeNT</span> <span class='varop'>$</span> <span class='varid'>head</span> <span class='varop'>$</span> <span class='varid'>ns</span><span class='layout'>)</span>
<a name="line-405"></a><span class='definition'>xname</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to function name with wrong arguments"</span>
<a name="line-406"></a>
<a name="line-407"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-408"></a><span class='comment'>-- string functions</span>
<a name="line-409"></a>
<a name="line-410"></a><a name="getFirstPos"></a><span class='comment'>-- |</span>
<a name="line-411"></a><span class='comment'>-- some helper functions</span>
<a name="line-412"></a><span class='definition'>getFirstPos</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Int</span>
<a name="line-413"></a><span class='definition'>getFirstPos</span> <span class='varid'>s</span> <span class='varid'>sub</span>
<a name="line-414"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='layout'>(</span><span class='varid'>getFirstPos'</span> <span class='varid'>s</span> <span class='varid'>sub</span><span class='layout'>)</span> <span class='varop'>></span> <span class='varid'>length</span> <span class='varid'>s</span>
<a name="line-415"></a> <span class='keyword'>then</span> <span class='comment'>-</span><span class='num'>1</span>
<a name="line-416"></a> <span class='keyword'>else</span> <span class='varid'>getFirstPos'</span> <span class='varid'>s</span> <span class='varid'>sub</span>
<a name="line-417"></a>
<a name="line-418"></a><a name="getFirstPos'"></a><span class='definition'>getFirstPos'</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Int</span>
<a name="line-419"></a><span class='definition'>getFirstPos'</span> <span class='conid'>[]</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='num'>2</span>
<a name="line-420"></a><span class='definition'>getFirstPos'</span> <span class='layout'>(</span><span class='varid'>x</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='varid'>sub</span>
<a name="line-421"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>strStartsWith</span> <span class='layout'>(</span><span class='varid'>x</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='varid'>sub</span>
<a name="line-422"></a> <span class='keyword'>then</span> <span class='num'>0</span>
<a name="line-423"></a> <span class='keyword'>else</span> <span class='num'>1</span> <span class='varop'>+</span> <span class='varid'>getFirstPos'</span> <span class='varid'>xs</span> <span class='varid'>sub</span>
<a name="line-424"></a>
<a name="line-425"></a><a name="strStartsWith"></a><span class='definition'>strStartsWith</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-426"></a><span class='definition'>strStartsWith</span> <span class='varid'>a</span> <span class='varid'>b</span>
<a name="line-427"></a> <span class='keyglyph'>=</span> <span class='varid'>take</span> <span class='layout'>(</span><span class='varid'>length</span> <span class='varid'>b</span><span class='layout'>)</span> <span class='varid'>a</span> <span class='varop'>==</span> <span class='varid'>b</span>
<a name="line-428"></a>
<a name="line-429"></a>
<a name="line-430"></a>
<a name="line-431"></a><span class='comment'>-- |</span>
<a name="line-432"></a><span class='comment'>-- Returns the string-value of a node,</span>
<a name="line-433"></a><span class='comment'>-- the value of a namespace node is not supported</span>
<a name="line-434"></a>
<a name="line-435"></a><a name="stringValue"></a><span class='definition'>stringValue</span> <span class='keyglyph'>::</span> <span class='conid'>NavXmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XPathValue</span>
<a name="line-436"></a><span class='definition'>stringValue</span> <span class='layout'>(</span><span class='conid'>NT</span> <span class='varid'>a</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span><span class='layout'>)</span>
<a name="line-437"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='varop'>$</span> <span class='varid'>xpTextOf</span> <span class='varid'>a</span>
<a name="line-438"></a>
<a name="line-439"></a><span class='comment'>{-
<a name="line-440"></a> textFilter
<a name="line-441"></a> = getXCmt `orElse`
<a name="line-442"></a>-- getXNamespace `orElse`
<a name="line-443"></a> multi isXText
<a name="line-444"></a>
<a name="line-445"></a>-- = (isXTag `guards` multi isXText) `orElse`
<a name="line-446"></a>-- (isXPi `guards` multi isXText) `orElse`
<a name="line-447"></a>-- (isXAttr `guards` multi isXText) `orElse`
<a name="line-448"></a>-- (isXText `guards` multi isXText) `orElse`
<a name="line-449"></a>-- getXCmt
<a name="line-450"></a>-}</span>
<a name="line-451"></a>
<a name="line-452"></a>
<a name="line-453"></a><span class='comment'>-- |</span>
<a name="line-454"></a><span class='comment'>-- string string(object?): converts an object to a string</span>
<a name="line-455"></a>
<a name="line-456"></a><a name="xstring"></a><span class='definition'>xstring</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-457"></a><span class='definition'>xstring</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='conid'>[]</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='str'>""</span>
<a name="line-458"></a><span class='definition'>xstring</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='layout'>(</span><span class='varid'>x</span><span class='conop'>:</span><span class='keyword'>_</span><span class='layout'>)</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='varid'>stringValue</span> <span class='varid'>x</span>
<a name="line-459"></a><span class='definition'>xstring</span> <span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>cn</span><span class='layout'>)</span> <span class='keyword'>_</span> <span class='conid'>[]</span> <span class='keyglyph'>=</span> <span class='varid'>stringValue</span> <span class='varid'>cn</span>
<a name="line-460"></a>
<a name="line-461"></a><span class='definition'>xstring</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='varid'>a</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-462"></a> <span class='keyglyph'>|</span> <span class='varid'>a</span> <span class='varop'>==</span> <span class='layout'>(</span><span class='varid'>fromInteger</span> <span class='varop'>$</span> <span class='varid'>round</span> <span class='varid'>a</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>show</span> <span class='layout'>(</span><span class='layout'>(</span><span class='varid'>round</span> <span class='varid'>a</span><span class='layout'>)</span><span class='keyglyph'>::</span><span class='conid'>Integer</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-463"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>show</span> <span class='varid'>a</span><span class='layout'>)</span>
<a name="line-464"></a><span class='definition'>xstring</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNumber</span> <span class='varid'>s</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>show</span> <span class='varid'>s</span><span class='layout'>)</span>
<a name="line-465"></a>
<a name="line-466"></a><span class='definition'>xstring</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVBool</span> <span class='conid'>True</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='str'>"true"</span>
<a name="line-467"></a><span class='definition'>xstring</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVBool</span> <span class='conid'>False</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='str'>"false"</span>
<a name="line-468"></a>
<a name="line-469"></a><span class='definition'>xstring</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='varid'>s</span>
<a name="line-470"></a><span class='definition'>xstring</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVError</span> <span class='varid'>e</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='varid'>e</span>
<a name="line-471"></a><span class='definition'>xstring</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xstring with a wrong argument"</span>
<a name="line-472"></a>
<a name="line-473"></a>
<a name="line-474"></a>
<a name="line-475"></a><span class='comment'>-- |</span>
<a name="line-476"></a><span class='comment'>-- string concat(string, string, string*): returns the concatenation of its arguments</span>
<a name="line-477"></a>
<a name="line-478"></a><a name="xconcat"></a><span class='definition'>xconcat</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-479"></a><span class='definition'>xconcat</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-480"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>foldr</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='varid'>s</span> <span class='varop'>++</span><span class='layout'>)</span><span class='layout'>)</span> <span class='str'>""</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-481"></a>
<a name="line-482"></a>
<a name="line-483"></a><span class='comment'>-- |</span>
<a name="line-484"></a><span class='comment'>-- boolean starts-with(string, string): </span>
<a name="line-485"></a><span class='comment'>-- returns true if the first argument string starts </span>
<a name="line-486"></a><span class='comment'>-- with the second argument string, and otherwise returns false</span>
<a name="line-487"></a>
<a name="line-488"></a><a name="xstartsWith"></a><span class='definition'>xstartsWith</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-489"></a><span class='definition'>xstartsWith</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-490"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVBool</span> <span class='layout'>(</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>a</span><span class='layout'>)</span><span class='conop'>:</span><span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='varid'>b</span><span class='keyglyph'>]</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>strStartsWith</span> <span class='varid'>a</span> <span class='varid'>b</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-491"></a>
<a name="line-492"></a>
<a name="line-493"></a><span class='comment'>-- |</span>
<a name="line-494"></a><span class='comment'>-- boolean contains(string, string):</span>
<a name="line-495"></a><span class='comment'>-- returns true if the first argument string contains the second argument string,</span>
<a name="line-496"></a><span class='comment'>-- and otherwise returns false</span>
<a name="line-497"></a>
<a name="line-498"></a><a name="xcontains"></a><span class='definition'>xcontains</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-499"></a><span class='definition'>xcontains</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-500"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVBool</span> <span class='layout'>(</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span><span class='conop'>:</span><span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='varid'>sub</span><span class='keyglyph'>]</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>getFirstPos</span> <span class='varid'>s</span> <span class='varid'>sub</span> <span class='varop'>/=</span> <span class='comment'>-</span><span class='num'>1</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-501"></a>
<a name="line-502"></a>
<a name="line-503"></a><span class='comment'>-- |</span>
<a name="line-504"></a><span class='comment'>-- string substring-before(string, string):</span>
<a name="line-505"></a><span class='comment'>-- returns the substring of the first argument string that precedes the first occurrence of</span>
<a name="line-506"></a><span class='comment'>-- the second argument string </span>
<a name="line-507"></a><span class='comment'>-- in the first argument string, or the empty string if the first argument string does not</span>
<a name="line-508"></a><span class='comment'>-- contain the second argument string</span>
<a name="line-509"></a>
<a name="line-510"></a><a name="xsubstringBefore"></a><span class='definition'>xsubstringBefore</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-511"></a><span class='definition'>xsubstringBefore</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-512"></a> <span class='keyglyph'>=</span> <span class='varid'>xsubstringBefore'</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span>
<a name="line-513"></a>
<a name="line-514"></a><a name="xsubstringBefore'"></a><span class='definition'>xsubstringBefore'</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-515"></a><span class='definition'>xsubstringBefore'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='conop'>:</span><span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='conid'>[]</span><span class='keyglyph'>]</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='str'>""</span>
<a name="line-516"></a><span class='definition'>xsubstringBefore'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span><span class='conop'>:</span><span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='varid'>sub</span><span class='keyglyph'>]</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>take</span> <span class='layout'>(</span><span class='varid'>getFirstPos</span> <span class='varid'>s</span> <span class='varid'>sub</span><span class='layout'>)</span> <span class='varid'>s</span><span class='layout'>)</span>
<a name="line-517"></a><span class='definition'>xsubstringBefore'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xsubstringBefore' with a wrong argument"</span>
<a name="line-518"></a>
<a name="line-519"></a>
<a name="line-520"></a>
<a name="line-521"></a>
<a name="line-522"></a><span class='comment'>-- |</span>
<a name="line-523"></a><span class='comment'>-- string substring-after(string, string):</span>
<a name="line-524"></a><span class='comment'>-- returns the substring of the first argument string that follows the first occurrence of</span>
<a name="line-525"></a><span class='comment'>-- the second argument string </span>
<a name="line-526"></a><span class='comment'>-- in the first argument string, or the empty string if the first argument string does not</span>
<a name="line-527"></a><span class='comment'>-- contain the second argument string</span>
<a name="line-528"></a>
<a name="line-529"></a><a name="xsubstringAfter"></a><span class='definition'>xsubstringAfter</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-530"></a><span class='definition'>xsubstringAfter</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-531"></a> <span class='keyglyph'>=</span> <span class='varid'>xsubstringAfter'</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span>
<a name="line-532"></a>
<a name="line-533"></a><a name="xsubstringAfter'"></a><span class='definition'>xsubstringAfter'</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-534"></a><span class='definition'>xsubstringAfter'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span><span class='conop'>:</span><span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='conid'>[]</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-535"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='varid'>s</span>
<a name="line-536"></a><span class='definition'>xsubstringAfter'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span><span class='conop'>:</span><span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='varid'>sub</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-537"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>getFirstPos</span> <span class='varid'>s</span> <span class='varid'>sub</span> <span class='varop'>==</span> <span class='comment'>-</span><span class='num'>1</span>
<a name="line-538"></a> <span class='keyword'>then</span> <span class='layout'>(</span><span class='conid'>XPVString</span> <span class='str'>""</span><span class='layout'>)</span>
<a name="line-539"></a> <span class='keyword'>else</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>drop</span> <span class='layout'>(</span><span class='layout'>(</span><span class='varid'>getFirstPos</span> <span class='varid'>s</span> <span class='varid'>sub</span><span class='layout'>)</span><span class='varop'>+</span><span class='varid'>length</span> <span class='varid'>sub</span><span class='layout'>)</span> <span class='varid'>s</span><span class='layout'>)</span>
<a name="line-540"></a><span class='definition'>xsubstringAfter'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span>
<a name="line-541"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xsubstringAfter' with a wrong argument"</span>
<a name="line-542"></a>
<a name="line-543"></a>
<a name="line-544"></a><span class='comment'>-- |</span>
<a name="line-545"></a><span class='comment'>-- string substring(string, number, number?):</span>
<a name="line-546"></a><span class='comment'>-- returns the substring of the first argument starting at the position specified</span>
<a name="line-547"></a><span class='comment'>-- in the second argument </span>
<a name="line-548"></a><span class='comment'>-- with length specified in the third argument. If the third argument is not specified,</span>
<a name="line-549"></a><span class='comment'>-- it returns the substring </span>
<a name="line-550"></a><span class='comment'>-- starting at the position specified in the second argument and continuing to the end of the string.</span>
<a name="line-551"></a>
<a name="line-552"></a><a name="xsubstring"></a><span class='definition'>xsubstring</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-553"></a><span class='definition'>xsubstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='varid'>x</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span>
<a name="line-554"></a> <span class='keyglyph'>=</span> <span class='varid'>xsubstring'</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='varid'>x</span><span class='keyglyph'>]</span><span class='layout'>)</span><span class='varop'>++</span><span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xnumber</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>xs</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-555"></a><span class='definition'>xsubstring</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span>
<a name="line-556"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xsubstring with a wrong argument"</span>
<a name="line-557"></a>
<a name="line-558"></a><a name="xsubstring'"></a><span class='definition'>xsubstring'</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-559"></a><span class='definition'>xsubstring'</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span><span class='conop'>:</span><span class='varid'>start</span><span class='conop'>:</span><span class='conid'>[]</span><span class='layout'>)</span>
<a name="line-560"></a> <span class='keyglyph'>=</span> <span class='keyword'>case</span> <span class='varid'>xround</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='varid'>start</span><span class='keyglyph'>]</span> <span class='keyword'>of</span>
<a name="line-561"></a> <span class='conid'>XPVNumber</span> <span class='conid'>NaN</span> <span class='keyglyph'>-></span> <span class='conid'>XPVString</span> <span class='str'>""</span>
<a name="line-562"></a> <span class='conid'>XPVNumber</span> <span class='conid'>PosInf</span> <span class='keyglyph'>-></span> <span class='conid'>XPVString</span> <span class='str'>""</span>
<a name="line-563"></a> <span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='varid'>f</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>drop</span> <span class='layout'>(</span><span class='layout'>(</span><span class='varid'>round</span> <span class='varid'>f</span><span class='layout'>)</span><span class='comment'>-</span><span class='num'>1</span><span class='layout'>)</span> <span class='varid'>s</span><span class='layout'>)</span>
<a name="line-564"></a> <span class='conid'>XPVNumber</span> <span class='keyword'>_</span> <span class='keyglyph'>-></span> <span class='conid'>XPVString</span> <span class='varid'>s</span>
<a name="line-565"></a> <span class='keyword'>_</span> <span class='keyglyph'>-></span> <span class='conid'>XPVError</span> <span class='str'>"Call to xsubstring' with a wrong argument"</span>
<a name="line-566"></a>
<a name="line-567"></a><span class='definition'>xsubstring'</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span><span class='conop'>:</span><span class='varid'>start</span><span class='conop'>:</span><span class='keyglyph'>[</span><span class='varid'>end</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-568"></a> <span class='keyglyph'>=</span> <span class='keyword'>case</span> <span class='varid'>xPathAdd</span> <span class='conid'>Plus</span> <span class='layout'>(</span><span class='varid'>xround</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='varid'>start</span><span class='keyglyph'>]</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>xround</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='varid'>end</span><span class='keyglyph'>]</span><span class='layout'>)</span> <span class='keyword'>of</span>
<a name="line-569"></a> <span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='varid'>f</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>xsubstring'</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span> <span class='layout'>(</span><span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>take</span> <span class='layout'>(</span><span class='layout'>(</span><span class='varid'>round</span> <span class='varid'>f</span><span class='layout'>)</span> <span class='comment'>-</span><span class='num'>1</span><span class='layout'>)</span> <span class='varid'>s</span><span class='layout'>)</span><span class='layout'>)</span><span class='conop'>:</span><span class='keyglyph'>[</span><span class='varid'>start</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-570"></a> <span class='conid'>XPVNumber</span> <span class='conid'>PosInf</span> <span class='keyglyph'>-></span> <span class='varid'>xsubstring'</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span> <span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span><span class='conop'>:</span><span class='keyglyph'>[</span><span class='varid'>start</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-571"></a> <span class='conid'>XPVNumber</span> <span class='keyword'>_</span> <span class='keyglyph'>-></span> <span class='conid'>XPVString</span> <span class='str'>""</span>
<a name="line-572"></a> <span class='keyword'>_</span> <span class='keyglyph'>-></span> <span class='conid'>XPVError</span> <span class='str'>"Call to xsubstring' with a wrong argument"</span>
<a name="line-573"></a><span class='definition'>xsubstring'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span>
<a name="line-574"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xsubstring' with a wrong argument"</span>
<a name="line-575"></a>
<a name="line-576"></a>
<a name="line-577"></a><span class='comment'>-- |</span>
<a name="line-578"></a><span class='comment'>-- number string-length(string?):</span>
<a name="line-579"></a><span class='comment'>-- returns the number of characters in the string. If the argument is omitted,</span>
<a name="line-580"></a><span class='comment'>-- it defaults to the context node </span>
<a name="line-581"></a><span class='comment'>-- converted to a string, in other words the string-value of the context node.</span>
<a name="line-582"></a>
<a name="line-583"></a><a name="xstringLength"></a><span class='definition'>xstringLength</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-584"></a><span class='definition'>xstringLength</span> <span class='varid'>c</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>cn</span><span class='layout'>)</span> <span class='varid'>env</span> <span class='conid'>[]</span>
<a name="line-585"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='layout'>(</span><span class='varid'>fromIntegral</span> <span class='varop'>$</span> <span class='varid'>length</span> <span class='varid'>s</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-586"></a> <span class='keyword'>where</span> <span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='keyglyph'>[</span><span class='varid'>cn</span><span class='keyglyph'>]</span><span class='keyglyph'>]</span>
<a name="line-587"></a><span class='definition'>xstringLength</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-588"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='varop'>$</span> <span class='layout'>(</span><span class='keyglyph'>\</span><span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='varid'>int2XPNumber</span> <span class='varop'>$</span> <span class='varid'>length</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span>
<a name="line-589"></a>
<a name="line-590"></a>
<a name="line-591"></a><span class='comment'>-- |</span>
<a name="line-592"></a><span class='comment'>-- string normalize-space(string?):</span>
<a name="line-593"></a><span class='comment'>-- returns the argument string with whitespace normalized by stripping leading</span>
<a name="line-594"></a><span class='comment'>-- and trailing whitespace and replacing sequences </span>
<a name="line-595"></a><span class='comment'>-- of whitespace characters by a single space. If the argument is omitted,</span>
<a name="line-596"></a><span class='comment'>-- it defaults to the context node converted to a string, </span>
<a name="line-597"></a><span class='comment'>-- in other words the string-value of the context node.</span>
<a name="line-598"></a><span class='comment'>-- The string is parsed by a function parseStr from XPathParser module. <-- No longer! Tim Walkenhorst</span>
<a name="line-599"></a>
<a name="line-600"></a><a name="xnormalizeSpace"></a><span class='definition'>xnormalizeSpace</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-601"></a><span class='definition'>xnormalizeSpace</span> <span class='varid'>c</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>cn</span><span class='layout'>)</span> <span class='varid'>env</span> <span class='conid'>[]</span>
<a name="line-602"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='keyglyph'>\</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>XPVString</span> <span class='varop'>$</span> <span class='varid'>normStr</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='keyglyph'>[</span><span class='varid'>cn</span><span class='keyglyph'>]</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-603"></a><span class='definition'>xnormalizeSpace</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-604"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>XPVString</span> <span class='varop'>$</span> <span class='varid'>normStr</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span>
<a name="line-605"></a>
<a name="line-606"></a><a name="normStr"></a><span class='comment'>-- Tim Walkenhorst normStr replaces the use of parseStr...</span>
<a name="line-607"></a><span class='definition'>normStr</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-608"></a><span class='definition'>normStr</span> <span class='keyglyph'>=</span> <span class='varid'>unwords</span> <span class='varop'>.</span> <span class='varid'>words</span>
<a name="line-609"></a>
<a name="line-610"></a><a name="xtranslate"></a><span class='comment'>-- |</span>
<a name="line-611"></a><span class='comment'>-- string translate(string, string, string):</span>
<a name="line-612"></a><span class='comment'>-- returns the first argument string with occurrences of characters in the second argument string replaced by the character at </span>
<a name="line-613"></a><span class='comment'>-- the corresponding position in the third argument string</span>
<a name="line-614"></a><span class='definition'>xtranslate</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-615"></a><span class='definition'>xtranslate</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-616"></a> <span class='keyglyph'>=</span> <span class='varid'>xtranslate'</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span>
<a name="line-617"></a>
<a name="line-618"></a><a name="xtranslate'"></a><span class='definition'>xtranslate'</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-619"></a><span class='definition'>xtranslate'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>a</span><span class='layout'>)</span><span class='conop'>:</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>b</span><span class='layout'>)</span><span class='conop'>:</span><span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='varid'>c</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-620"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='layout'>(</span><span class='varid'>replace</span> <span class='varid'>a</span> <span class='varid'>b</span> <span class='varid'>c</span><span class='layout'>)</span>
<a name="line-621"></a><span class='definition'>xtranslate'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span>
<a name="line-622"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xtranslate' with a wrong argument"</span>
<a name="line-623"></a>
<a name="line-624"></a><a name="replace"></a><span class='definition'>replace</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-625"></a><span class='definition'>replace</span> <span class='varid'>str</span> <span class='conid'>[]</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='varid'>str</span>
<a name="line-626"></a>
<a name="line-627"></a><span class='comment'>-- remove all characters, if there is no corresponding character in the third argument</span>
<a name="line-628"></a><span class='definition'>replace</span> <span class='varid'>str</span> <span class='layout'>(</span><span class='varid'>x</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='conid'>[]</span>
<a name="line-629"></a> <span class='keyglyph'>=</span> <span class='varid'>replace</span> <span class='keyglyph'>[</span> <span class='varid'>s</span> <span class='keyglyph'>|</span> <span class='varid'>s</span> <span class='keyglyph'><-</span> <span class='varid'>str</span><span class='layout'>,</span> <span class='varid'>x</span> <span class='varop'>/=</span> <span class='varid'>s</span><span class='keyglyph'>]</span> <span class='varid'>xs</span> <span class='conid'>[]</span>
<a name="line-630"></a>
<a name="line-631"></a><span class='definition'>replace</span> <span class='varid'>str</span> <span class='layout'>(</span><span class='varid'>x</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>y</span><span class='conop'>:</span><span class='varid'>ys</span><span class='layout'>)</span>
<a name="line-632"></a> <span class='keyglyph'>=</span> <span class='varid'>replace</span> <span class='layout'>(</span><span class='varid'>rep</span> <span class='varid'>x</span> <span class='varid'>y</span> <span class='varid'>str</span><span class='layout'>)</span> <span class='varid'>xs</span> <span class='varid'>ys</span>
<a name="line-633"></a> <span class='keyword'>where</span> <span class='comment'>-- replace all characters in the first argument</span>
<a name="line-634"></a> <span class='varid'>rep</span> <span class='keyglyph'>::</span> <span class='conid'>Char</span> <span class='keyglyph'>-></span> <span class='conid'>Char</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-635"></a> <span class='varid'>rep</span> <span class='varid'>a</span> <span class='varid'>b</span> <span class='keyglyph'>=</span> <span class='varid'>foldr</span> <span class='layout'>(</span><span class='keyglyph'>\</span><span class='varid'>c</span> <span class='keyglyph'>-></span> <span class='keyword'>if</span> <span class='varid'>c</span> <span class='varop'>==</span> <span class='varid'>a</span> <span class='keyword'>then</span> <span class='layout'>(</span><span class='varid'>b</span><span class='conop'>:</span><span class='layout'>)</span> <span class='keyword'>else</span> <span class='layout'>(</span><span class='varid'>c</span><span class='conop'>:</span><span class='layout'>)</span><span class='layout'>)</span> <span class='str'>""</span>
<a name="line-636"></a>
<a name="line-637"></a>
<a name="line-638"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-639"></a><span class='comment'>-- boolean functions</span>
<a name="line-640"></a>
<a name="line-641"></a><a name="xboolean"></a><span class='comment'>-- |</span>
<a name="line-642"></a><span class='comment'>-- boolean boolean(object): converts its argument to a boolean value</span>
<a name="line-643"></a><span class='definition'>xboolean</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-644"></a><span class='definition'>xboolean</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNumber</span> <span class='varid'>a</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVBool</span> <span class='layout'>(</span><span class='varid'>a</span><span class='varop'>/=</span> <span class='conid'>NaN</span> <span class='varop'>&&</span> <span class='varid'>a</span><span class='varop'>/=</span> <span class='conid'>Neg0</span> <span class='varop'>&&</span> <span class='varid'>a</span><span class='varop'>/=</span> <span class='conid'>Pos0</span><span class='layout'>)</span>
<a name="line-645"></a><span class='definition'>xboolean</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVBool</span> <span class='layout'>(</span><span class='varid'>length</span> <span class='varid'>s</span> <span class='varop'>/=</span> <span class='num'>0</span><span class='layout'>)</span>
<a name="line-646"></a><span class='definition'>xboolean</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVBool</span> <span class='varid'>b</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVBool</span> <span class='varid'>b</span>
<a name="line-647"></a><span class='definition'>xboolean</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='varid'>ns</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVBool</span> <span class='layout'>(</span><span class='varid'>length</span> <span class='varid'>ns</span> <span class='varop'>></span> <span class='num'>0</span><span class='layout'>)</span>
<a name="line-648"></a><span class='definition'>xboolean</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVError</span> <span class='varid'>e</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='varid'>e</span>
<a name="line-649"></a><span class='definition'>xboolean</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xboolean with a wrong argument"</span>
<a name="line-650"></a>
<a name="line-651"></a>
<a name="line-652"></a><a name="xnot"></a><span class='comment'>-- |</span>
<a name="line-653"></a><span class='comment'>-- boolean not(boolean): returns true if its argument is false, and false otherwise</span>
<a name="line-654"></a><span class='definition'>xnot</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-655"></a><span class='definition'>xnot</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-656"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVBool</span> <span class='layout'>(</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='layout'>(</span><span class='conid'>XPVBool</span> <span class='varid'>b</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>not</span> <span class='varid'>b</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>xboolean</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-657"></a>
<a name="line-658"></a>
<a name="line-659"></a><a name="xtrue"></a><span class='comment'>-- |</span>
<a name="line-660"></a><span class='comment'>-- boolean true(): returns true</span>
<a name="line-661"></a><span class='definition'>xtrue</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-662"></a><span class='definition'>xtrue</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVBool</span> <span class='conid'>True</span>
<a name="line-663"></a>
<a name="line-664"></a>
<a name="line-665"></a><a name="xfalse"></a><span class='comment'>-- |</span>
<a name="line-666"></a><span class='comment'>-- boolean false(): returns false</span>
<a name="line-667"></a><span class='definition'>xfalse</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-668"></a><span class='definition'>xfalse</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVBool</span> <span class='conid'>False</span>
<a name="line-669"></a>
<a name="line-670"></a>
<a name="line-671"></a><span class='comment'>-- |</span>
<a name="line-672"></a><span class='comment'>-- boolean lang(string):</span>
<a name="line-673"></a><span class='comment'>-- returns true or false depending on whether the language of the context node as specified by xml:lang attributes </span>
<a name="line-674"></a><span class='comment'>-- is the same as or is a sublanguage of the language specified by the argument string</span>
<a name="line-675"></a>
<a name="line-676"></a><a name="xlang"></a><span class='comment'>-- function needs namespaces which are not supported by the toolbox</span>
<a name="line-677"></a><span class='definition'>xlang</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-678"></a><span class='definition'>xlang</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span>
<a name="line-679"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"namespaces are not supported"</span>
<a name="line-680"></a>
<a name="line-681"></a><span class='comment'>-- xlang c env args</span>
<a name="line-682"></a><span class='comment'>-- = (\ (_, _, cn) [XPVString s] -> ...) c (toXValue xstring c env args)</span>
<a name="line-683"></a>
<a name="line-684"></a>
<a name="line-685"></a>
<a name="line-686"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-687"></a><span class='comment'>-- number functions</span>
<a name="line-688"></a>
<a name="line-689"></a><a name="xnumber"></a><span class='comment'>-- |</span>
<a name="line-690"></a><span class='comment'>-- number number(object?): converts its argument to a number</span>
<a name="line-691"></a><span class='definition'>xnumber</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-692"></a><span class='definition'>xnumber</span> <span class='varid'>c</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>cn</span><span class='layout'>)</span> <span class='varid'>env</span> <span class='conid'>[]</span>
<a name="line-693"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='keyglyph'>\</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>parseNumber</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='keyglyph'>[</span><span class='varid'>cn</span><span class='keyglyph'>]</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-694"></a><span class='definition'>xnumber</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='varid'>n</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>XPVNode</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-695"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='keyglyph'>\</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>parseNumber</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='varid'>n</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-696"></a>
<a name="line-697"></a><span class='definition'>xnumber</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVBool</span> <span class='varid'>b</span><span class='keyglyph'>]</span>
<a name="line-698"></a> <span class='keyglyph'>|</span> <span class='varid'>b</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='num'>1</span><span class='layout'>)</span>
<a name="line-699"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='conid'>Pos0</span>
<a name="line-700"></a>
<a name="line-701"></a><span class='definition'>xnumber</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='varid'>parseNumber</span> <span class='varid'>s</span>
<a name="line-702"></a><span class='definition'>xnumber</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNumber</span> <span class='varid'>a</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='varid'>a</span>
<a name="line-703"></a><span class='definition'>xnumber</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVError</span> <span class='varid'>e</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='varid'>e</span>
<a name="line-704"></a><span class='definition'>xnumber</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xnumber with a wrong argument"</span>
<a name="line-705"></a>
<a name="line-706"></a>
<a name="line-707"></a><a name="xsum"></a><span class='comment'>-- |</span>
<a name="line-708"></a><span class='comment'>-- number sum(node-set): </span>
<a name="line-709"></a><span class='comment'>-- returns the sum, for each node in the argument node-set, of the result of </span>
<a name="line-710"></a><span class='comment'>-- converting the string-values of the node to a number</span>
<a name="line-711"></a><span class='definition'>xsum</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-712"></a><span class='definition'>xsum</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='conid'>[]</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='conid'>NaN</span>
<a name="line-713"></a><span class='definition'>xsum</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='varid'>ns</span><span class='keyglyph'>]</span>
<a name="line-714"></a> <span class='keyglyph'>=</span> <span class='varid'>foldr1</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>a</span> <span class='varid'>b</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='varid'>xPathAdd</span> <span class='conid'>Plus</span> <span class='varid'>a</span> <span class='varid'>b</span><span class='layout'>)</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>getValues</span> <span class='varid'>ns</span><span class='layout'>)</span>
<a name="line-715"></a> <span class='keyword'>where</span>
<a name="line-716"></a> <span class='varid'>getValues</span> <span class='keyglyph'>::</span> <span class='conid'>NodeSet</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>XPathValue</span><span class='keyglyph'>]</span>
<a name="line-717"></a> <span class='varid'>getValues</span> <span class='keyglyph'>=</span> <span class='varid'>foldr</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='keyglyph'>[</span><span class='varid'>xnumber</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varop'>$</span> <span class='keyglyph'>[</span><span class='varid'>stringValue</span> <span class='varid'>n</span><span class='keyglyph'>]</span> <span class='keyglyph'>]</span> <span class='varop'>++</span><span class='layout'>)</span> <span class='layout'>)</span> <span class='conid'>[]</span>
<a name="line-718"></a>
<a name="line-719"></a><span class='definition'>xsum</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span>
<a name="line-720"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"The value of the function sum is not a nodeset"</span>
<a name="line-721"></a>
<a name="line-722"></a><a name="xfloor"></a><span class='comment'>-- |</span>
<a name="line-723"></a><span class='comment'>-- number floor(number): returns the largest (closest to positive infinity) number that is not greater </span>
<a name="line-724"></a><span class='comment'>-- than the argument and that is an integer</span>
<a name="line-725"></a><span class='definition'>xfloor</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-726"></a><span class='definition'>xfloor</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-727"></a> <span class='keyglyph'>=</span> <span class='varid'>xfloor'</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xnumber</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span>
<a name="line-728"></a> <span class='keyword'>where</span>
<a name="line-729"></a> <span class='varid'>xfloor'</span> <span class='keyglyph'>[</span><span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='varid'>f</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-730"></a> <span class='keyglyph'>|</span> <span class='varid'>f</span> <span class='varop'>></span> <span class='num'>0</span> <span class='varop'>&&</span> <span class='varid'>f</span> <span class='varop'><</span> <span class='num'>1</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='conid'>Pos0</span>
<a name="line-731"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='layout'>(</span><span class='varid'>fromInteger</span> <span class='varop'>$</span> <span class='varid'>floor</span> <span class='varid'>f</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-732"></a> <span class='varid'>xfloor'</span> <span class='keyglyph'>[</span><span class='conid'>XPVNumber</span> <span class='varid'>a</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='varid'>a</span>
<a name="line-733"></a> <span class='varid'>xfloor'</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xfloor' without a number"</span>
<a name="line-734"></a>
<a name="line-735"></a>
<a name="line-736"></a><a name="xceiling"></a><span class='comment'>-- |</span>
<a name="line-737"></a><span class='comment'>-- number ceiling(number): returns the smallest (closest to negative infinity) number that is not less </span>
<a name="line-738"></a><span class='comment'>-- than the argument and that is an integer</span>
<a name="line-739"></a><span class='definition'>xceiling</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-740"></a><span class='definition'>xceiling</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-741"></a> <span class='keyglyph'>=</span> <span class='varid'>xceiling'</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xnumber</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span>
<a name="line-742"></a> <span class='keyword'>where</span>
<a name="line-743"></a> <span class='varid'>xceiling'</span> <span class='keyglyph'>[</span><span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='varid'>f</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-744"></a> <span class='keyglyph'>|</span> <span class='varid'>f</span> <span class='varop'><</span> <span class='num'>0</span> <span class='varop'>&&</span> <span class='varid'>f</span> <span class='varop'>></span> <span class='comment'>-</span><span class='num'>1</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='conid'>Pos0</span>
<a name="line-745"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='layout'>(</span><span class='varid'>fromInteger</span> <span class='varop'>$</span> <span class='varid'>ceiling</span> <span class='varid'>f</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-746"></a> <span class='varid'>xceiling'</span> <span class='keyglyph'>[</span><span class='conid'>XPVNumber</span> <span class='varid'>a</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='varid'>a</span>
<a name="line-747"></a> <span class='varid'>xceiling'</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xceiling' without a number"</span>
<a name="line-748"></a>
<a name="line-749"></a><a name="xround"></a><span class='comment'>-- |</span>
<a name="line-750"></a><span class='comment'>-- number round(number):</span>
<a name="line-751"></a><span class='comment'>-- returns the number that is closest to the argument and that is an integer. </span>
<a name="line-752"></a><span class='comment'>-- If there are two such numbers, then the one that is closest to positive infinity is returned.</span>
<a name="line-753"></a><span class='definition'>xround</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-754"></a><span class='definition'>xround</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span>
<a name="line-755"></a> <span class='keyglyph'>=</span> <span class='varid'>xround'</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xnumber</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>args</span><span class='layout'>)</span>
<a name="line-756"></a>
<a name="line-757"></a><a name="xround'"></a><span class='definition'>xround'</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-758"></a><span class='definition'>xround'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='varid'>f</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-759"></a> <span class='keyglyph'>|</span> <span class='varid'>f</span> <span class='varop'><</span> <span class='num'>0</span> <span class='varop'>&&</span> <span class='varid'>f</span> <span class='varop'>>=</span> <span class='comment'>-</span><span class='num'>0.5</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='conid'>Neg0</span>
<a name="line-760"></a> <span class='keyglyph'>|</span> <span class='varid'>f</span> <span class='varop'>>=</span> <span class='num'>0</span> <span class='varop'>&&</span> <span class='varid'>f</span> <span class='varop'><</span> <span class='num'>0.5</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='conid'>Pos0</span>
<a name="line-761"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='layout'>(</span><span class='conid'>Float</span> <span class='layout'>(</span><span class='varid'>fromInteger</span> <span class='varop'>$</span> <span class='varid'>xPathRound</span> <span class='varid'>f</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-762"></a> <span class='keyword'>where</span>
<a name="line-763"></a> <span class='varid'>xPathRound</span> <span class='varid'>a</span>
<a name="line-764"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>a</span> <span class='comment'>-</span> <span class='layout'>(</span><span class='varid'>fromInteger</span> <span class='varop'>$</span> <span class='varid'>floor</span> <span class='varid'>a</span><span class='layout'>)</span> <span class='varop'><</span> <span class='num'>0.5</span>
<a name="line-765"></a> <span class='keyword'>then</span> <span class='varid'>floor</span> <span class='varid'>a</span>
<a name="line-766"></a> <span class='keyword'>else</span> <span class='varid'>floor</span> <span class='layout'>(</span><span class='varid'>a</span><span class='varop'>+</span><span class='num'>1</span><span class='layout'>)</span>
<a name="line-767"></a>
<a name="line-768"></a><span class='definition'>xround'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNumber</span> <span class='varid'>a</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNumber</span> <span class='varid'>a</span>
<a name="line-769"></a><span class='definition'>xround'</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xround' without a number"</span>
<a name="line-770"></a>
<a name="line-771"></a>
<a name="line-772"></a>
<a name="line-773"></a><a name="xkey"></a><span class='comment'>-- |</span>
<a name="line-774"></a><span class='comment'>-- node-set key(string, object):</span>
<a name="line-775"></a><span class='comment'>-- does for keys what the id function does for IDs</span>
<a name="line-776"></a><span class='comment'>-- The first argument specifies the name of the key.</span>
<a name="line-777"></a><span class='comment'>-- When the second argument is of type node-set, then the result is the</span>
<a name="line-778"></a><span class='comment'>-- union of the result of applying the key function to the string value</span>
<a name="line-779"></a><span class='comment'>-- of each of the nodes in the argument node-set.</span>
<a name="line-780"></a><span class='comment'>-- When the second argument is of any other type, the argument is</span>
<a name="line-781"></a><span class='comment'>-- converted to a string </span>
<a name="line-782"></a><span class='definition'>xkey</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-783"></a><span class='definition'>xkey</span> <span class='keyword'>_</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='conop'>:</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='varid'>ns</span><span class='keyglyph'>]</span><span class='layout'>)</span>
<a name="line-784"></a> <span class='keyglyph'>=</span> <span class='varid'>isInKey</span> <span class='layout'>(</span><span class='varid'>getKeyTab</span> <span class='varid'>env</span><span class='layout'>)</span> <span class='varid'>s</span> <span class='layout'>(</span><span class='varid'>strValues</span> <span class='varid'>ns</span><span class='layout'>)</span>
<a name="line-785"></a> <span class='keyword'>where</span>
<a name="line-786"></a> <span class='varid'>strValues</span> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='layout'>(</span><span class='keyglyph'>\</span> <span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>str</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>str</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>stringValue</span><span class='layout'>)</span>
<a name="line-787"></a>
<a name="line-788"></a><span class='definition'>xkey</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='conop'>:</span> <span class='varid'>arg</span><span class='layout'>)</span>
<a name="line-789"></a> <span class='comment'>-- = isInKey (getKeyTab env) s ( (\(XPVString s) -> words s) (xstring c env arg))</span>
<a name="line-790"></a> <span class='keyglyph'>=</span> <span class='varid'>isInKey</span> <span class='layout'>(</span><span class='varid'>getKeyTab</span> <span class='varid'>env</span><span class='layout'>)</span> <span class='varid'>s</span> <span class='keyglyph'>[</span><span class='varid'>str</span><span class='keyglyph'>]</span>
<a name="line-791"></a> <span class='keyword'>where</span>
<a name="line-792"></a> <span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>str</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>arg</span>
<a name="line-793"></a>
<a name="line-794"></a><span class='definition'>xkey</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xkey with a wrong argument"</span>
<a name="line-795"></a>
<a name="line-796"></a>
<a name="line-797"></a><a name="isInKey"></a><span class='definition'>isInKey</span> <span class='keyglyph'>::</span> <span class='conid'>KeyTab</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>XPathValue</span>
<a name="line-798"></a><span class='definition'>isInKey</span> <span class='varid'>kt</span> <span class='varid'>kn</span> <span class='varid'>kv</span>
<a name="line-799"></a> <span class='comment'>-- = remDups (XPVNode (map ntree ts) )</span>
<a name="line-800"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVNode</span> <span class='varid'>ts</span> <span class='comment'>--(map ntree ts)</span>
<a name="line-801"></a> <span class='keyword'>where</span>
<a name="line-802"></a> <span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>ts</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>unzip3</span> <span class='varop'>$</span> <span class='varid'>concat</span> <span class='varop'>$</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>isKeyVal</span> <span class='layout'>(</span><span class='varid'>isKeyName</span> <span class='varid'>kt</span> <span class='varid'>kn</span><span class='layout'>)</span><span class='layout'>)</span> <span class='varid'>kv</span>
<a name="line-803"></a>
<a name="line-804"></a><a name="isKeyName"></a><span class='definition'>isKeyName</span> <span class='keyglyph'>::</span> <span class='conid'>KeyTab</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>KeyTab</span>
<a name="line-805"></a><span class='definition'>isKeyName</span> <span class='varid'>kt</span> <span class='varid'>kn</span> <span class='keyglyph'>=</span> <span class='varid'>filter</span> <span class='layout'>(</span><span class='varid'>isOfKeyName</span> <span class='varid'>kn</span><span class='layout'>)</span> <span class='varid'>kt</span>
<a name="line-806"></a>
<a name="line-807"></a><a name="isKeyVal"></a><span class='definition'>isKeyVal</span> <span class='keyglyph'>::</span> <span class='conid'>KeyTab</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>KeyTab</span>
<a name="line-808"></a><span class='definition'>isKeyVal</span> <span class='varid'>kt</span> <span class='varid'>kv</span> <span class='keyglyph'>=</span> <span class='varid'>filter</span> <span class='layout'>(</span><span class='varid'>isOfKeyValue</span> <span class='varid'>kv</span><span class='layout'>)</span> <span class='varid'>kt</span>
<a name="line-809"></a>
<a name="line-810"></a><a name="isOfKeyName"></a><span class='definition'>isOfKeyName</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='conid'>QName</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>NavXmlTree</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-811"></a><span class='definition'>isOfKeyName</span> <span class='varid'>kn</span> <span class='layout'>(</span><span class='varid'>qn</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>localPart</span> <span class='varid'>qn</span><span class='layout'>)</span> <span class='varop'>==</span> <span class='varid'>kn</span>
<a name="line-812"></a>
<a name="line-813"></a>
<a name="line-814"></a><a name="isOfKeyValue"></a><span class='definition'>isOfKeyValue</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='conid'>QName</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>NavXmlTree</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-815"></a><span class='definition'>isOfKeyValue</span> <span class='varid'>kv</span> <span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>v</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>v</span> <span class='varop'>==</span> <span class='varid'>kv</span>
<a name="line-816"></a>
<a name="line-817"></a>
<a name="line-818"></a><span class='comment'>-- |</span>
<a name="line-819"></a><span class='comment'>-- string format-number(number, string, string?):</span>
<a name="line-820"></a><span class='comment'>-- converts its first argument to a string using the format pattern string</span>
<a name="line-821"></a><span class='comment'>-- specified by the second argument and the decimal-format named by the</span>
<a name="line-822"></a><span class='comment'>-- third argument, or the default decimal-format, if there is no third argument</span>
<a name="line-823"></a>
<a name="line-824"></a><a name="xformatNumber"></a><span class='definition'>xformatNumber</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-825"></a><span class='definition'>xformatNumber</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='varid'>x</span><span class='conop'>:</span><span class='varid'>xs</span><span class='layout'>)</span>
<a name="line-826"></a> <span class='keyglyph'>=</span> <span class='varid'>xsubstring'</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='layout'>(</span><span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='keyglyph'>[</span><span class='varid'>x</span><span class='keyglyph'>]</span><span class='layout'>)</span><span class='varop'>++</span><span class='layout'>(</span><span class='varid'>toXValue</span> <span class='varid'>xnumber</span> <span class='varid'>c</span> <span class='varid'>env</span> <span class='varid'>xs</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-827"></a><span class='definition'>xformatNumber</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span>
<a name="line-828"></a> <span class='keyglyph'>=</span> <span class='conid'>XPVError</span> <span class='str'>"Call to xformatNumber with a wrong argument"</span>
<a name="line-829"></a>
<a name="line-830"></a>
<a name="line-831"></a><span class='comment'>-- Poor man's document(...) function. Opens exactly one document. </span>
<a name="line-832"></a><span class='comment'>-- Does not support "fragment identifiers". "Base-URI" is always current directory.</span>
<a name="line-833"></a><span class='comment'>-- Should still be good enough for home use.</span>
<a name="line-834"></a>
<a name="line-835"></a><a name="xdocument"></a><span class='definition'>xdocument</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-836"></a><span class='definition'>xdocument</span> <span class='varid'>c</span> <span class='varid'>e</span> <span class='varid'>val</span> <span class='keyglyph'>=</span> <span class='conid'>XPVNode</span> <span class='varop'>$</span> <span class='layout'>(</span><span class='keyglyph'>\</span><span class='layout'>(</span><span class='conid'>XPVString</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>xdocument'</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>xstring</span> <span class='varid'>c</span> <span class='varid'>e</span> <span class='varid'>val</span>
<a name="line-837"></a>
<a name="line-838"></a><a name="xdocument'"></a><span class='definition'>xdocument'</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>NavXmlTree</span><span class='keyglyph'>]</span>
<a name="line-839"></a><span class='definition'>xdocument'</span> <span class='varid'>uri</span> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='varid'>ntree</span> <span class='varop'>$</span>
<a name="line-840"></a> <span class='varid'>unsafePerformIO</span> <span class='varop'>$</span>
<a name="line-841"></a> <span class='varid'>runX</span> <span class='layout'>(</span> <span class='varid'>readDocument</span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='varid'>a_validate</span><span class='layout'>,</span> <span class='varid'>v_0</span><span class='layout'>)</span><span class='keyglyph'>]</span> <span class='varid'>uri</span>
<a name="line-842"></a> <span class='varop'>>>></span>
<a name="line-843"></a> <span class='varid'>addAttr</span> <span class='str'>"rootId"</span> <span class='layout'>(</span><span class='str'>"doc "</span> <span class='varop'>++</span> <span class='varid'>uri</span><span class='layout'>)</span>
<a name="line-844"></a> <span class='layout'>)</span>
<a name="line-845"></a>
<a name="line-846"></a><a name="xgenerateId"></a><span class='comment'>-- generate-id, should be fully compliant with XSLT specification.</span>
<a name="line-847"></a><span class='definition'>xgenerateId</span> <span class='keyglyph'>::</span> <span class='conid'>XFct</span>
<a name="line-848"></a><span class='definition'>xgenerateId</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>[</span><span class='conid'>XPVNode</span> <span class='layout'>(</span><span class='varid'>node</span><span class='conop'>:</span><span class='keyword'>_</span><span class='layout'>)</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='varid'>xgenerateId'</span> <span class='varid'>node</span>
<a name="line-849"></a><span class='definition'>xgenerateId</span> <span class='layout'>(</span><span class='keyword'>_</span><span class='layout'>,</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='varid'>node</span><span class='layout'>)</span> <span class='keyword'>_</span> <span class='conid'>[]</span> <span class='keyglyph'>=</span> <span class='varid'>xgenerateId'</span> <span class='varid'>node</span>
<a name="line-850"></a><span class='definition'>xgenerateId</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='str'>"illegal arguments in xgenerateId"</span>
<a name="line-851"></a>
<a name="line-852"></a><a name="xgenerateId'"></a><span class='definition'>xgenerateId'</span> <span class='keyglyph'>::</span> <span class='conid'>NavXmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XPathValue</span>
<a name="line-853"></a><span class='definition'>xgenerateId'</span> <span class='keyglyph'>=</span> <span class='conid'>XPVString</span> <span class='varop'>.</span> <span class='layout'>(</span><span class='str'>"id_"</span><span class='varop'>++</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>str2XmlId</span> <span class='varop'>.</span> <span class='varid'>show</span> <span class='varop'>.</span> <span class='varid'>nodeID</span> <span class='varop'>.</span> <span class='conid'>Just</span>
<a name="line-854"></a>
<a name="line-855"></a><a name="str2XmlId"></a><span class='definition'>str2XmlId</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-856"></a><span class='definition'>str2XmlId</span> <span class='keyglyph'>=</span> <span class='varid'>concatMap</span> <span class='varid'>convert</span>
<a name="line-857"></a> <span class='keyword'>where</span> <span class='varid'>convert</span> <span class='varid'>c</span> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>isAscii</span> <span class='varid'>c</span> <span class='varop'>&&</span> <span class='layout'>(</span><span class='varid'>isUpper</span> <span class='varid'>c</span> <span class='varop'>||</span> <span class='varid'>isLower</span> <span class='varid'>c</span> <span class='varop'>||</span> <span class='varid'>isDigit</span> <span class='varid'>c</span><span class='layout'>)</span>
<a name="line-858"></a> <span class='keyword'>then</span> <span class='keyglyph'>[</span><span class='varid'>c</span><span class='keyglyph'>]</span>
<a name="line-859"></a> <span class='keyword'>else</span> <span class='str'>"_"</span> <span class='varop'>++</span> <span class='layout'>(</span><span class='varid'>show</span> <span class='varop'>$</span> <span class='varid'>ord</span> <span class='varid'>c</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>"_"</span>
<a name="line-860"></a>
<a name="line-861"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-862"></a>
<a name="line-863"></a><a name="xpNamePart"></a><span class='definition'>xpNamePart</span> <span class='keyglyph'>::</span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-864"></a><span class='definition'>xpNamePart</span> <span class='varid'>getNp</span>
<a name="line-865"></a> <span class='keyglyph'>=</span> <span class='varid'>concat</span>
<a name="line-866"></a> <span class='varop'>.</span>
<a name="line-867"></a> <span class='varid'>runLA</span> <span class='layout'>(</span> <span class='varid'>ifA</span> <span class='varid'>isRoot</span>
<a name="line-868"></a> <span class='layout'>(</span><span class='varid'>constA</span> <span class='str'>""</span><span class='layout'>)</span>
<a name="line-869"></a> <span class='varid'>getNp</span>
<a name="line-870"></a> <span class='layout'>)</span>
<a name="line-871"></a>
<a name="line-872"></a><a name="xpLocalPartOf"></a><span class='definition'>xpLocalPartOf</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-873"></a><span class='definition'>xpLocalPartOf</span> <span class='keyglyph'>=</span> <span class='varid'>xpNamePart</span> <span class='varid'>getLocalPart</span>
<a name="line-874"></a>
<a name="line-875"></a><a name="xpNamespaceOf"></a><span class='definition'>xpNamespaceOf</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-876"></a><span class='definition'>xpNamespaceOf</span> <span class='keyglyph'>=</span> <span class='varid'>xpNamePart</span> <span class='varid'>getNamespaceUri</span>
<a name="line-877"></a>
<a name="line-878"></a><a name="xpNameOf"></a><span class='definition'>xpNameOf</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-879"></a><span class='definition'>xpNameOf</span> <span class='keyglyph'>=</span> <span class='varid'>xpNamePart</span> <span class='varid'>getName</span>
<a name="line-880"></a>
<a name="line-881"></a><a name="getValue"></a><span class='definition'>getValue</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-882"></a><span class='definition'>getValue</span> <span class='varid'>n</span> <span class='keyglyph'>=</span> <span class='varid'>concat</span> <span class='varop'>.</span> <span class='varid'>runLA</span> <span class='layout'>(</span><span class='varid'>getAttrValue</span> <span class='varid'>n</span><span class='layout'>)</span>
<a name="line-883"></a>
<a name="line-884"></a><a name="xpTextOf"></a><span class='definition'>xpTextOf</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-885"></a><span class='definition'>xpTextOf</span> <span class='keyglyph'>=</span> <span class='varid'>concat</span> <span class='varop'>.</span> <span class='varid'>runLA</span> <span class='layout'>(</span><span class='varid'>xshow</span> <span class='layout'>(</span><span class='layout'>(</span><span class='varid'>getCmt</span> <span class='varop'>>>></span> <span class='varid'>mkText</span><span class='layout'>)</span> <span class='varop'><+></span> <span class='varid'>deep</span> <span class='varid'>isText</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-886"></a>
<a name="line-887"></a><span class='comment'>-- ------------------------------------------------------------</span>
</pre></body>
</html>