.. highlightlang:: us

.. index:: Überblick XML, XML 

.. _uberblick-xml:

Überblick XML
=============

Ab UniPlot R2010 kann die Funktion :ref:`xml_parse_string` verwendet werden,
um XML in ein UniScript-Objekt zu zerlegen. In Sonderfällen (riesige Dokumente,
parsen von Teilen, etc.) kann auch der Expat-Parser verwendet werden.

UniScript verwendet eine Untermenge des XML-Parsers Expat, Release 2.00.0.
Expat ist eine C Library, geschrieben von James Clark um XML zu parsen.
Weitere Informationen zu Expat finden Sie unter 
http://expat.sourceforge.net/.

Die Untermenge von Expat, die UniScript verwendet, sollte ausreichen
um einen großen Teil von XML-Dokumenten zu parsen. 

Expat ist ein  Stream-orientierter XML-Parser. Dies bedeutet, dass der Anwender
Handler registriert, bevor das Dokument geparsed wird.

.. us.example

**Beispiel**

::

   def startElement(hParser, name, atts)
   {
       hInfo = XML_GetUserData(hParser);
       depthPtr = MapLookup(hInfo, "depthPtr");
       fpout = MapLookup(hInfo, "fpout");
       if (depthPtr > 0) {    
           for (i in 1:depthPtr) {
               fprintf(fpout, "  ");
           }
       }
       fprintf(fpout, "<%s", name);
       MapSetAt(hInfo, "name", name);
       MapSetAt(hInfo, sprintf("name%d", depthPtr), name);
       if (atts[1] != "") {
           for (i in 1:len(atts)/2) {
               fprintf(fpout, " %s=\"%s\" ", atts[i;1], atts[i;2]);
           }
       }
       fprintf(fpout, ">\n");
       depthPtr = depthPtr + 1;
       MapSetAt(hInfo, "depthPtr", depthPtr);
   }
   def charData(hParser, data)
   {
       hInfo = XML_GetUserData(hParser);
       fpout = MapLookup(hInfo, "fpout");
       fprintf(fpout, "%s", data);
   }
   def endElement(hParser, name)
   {
       hInfo = XML_GetUserData(hParser);
       depthPtr = MapLookup(hInfo, "depthPtr");
       fpout = MapLookup(hInfo, "fpout");
       depthPtr = depthPtr - 1;
       if (depthPtr > 0) {    
           for (i in 1:depthPtr) {
               fprintf(fpout, "  ");
           }
       }
       name = MapLookup(hInfo, sprintf("name%d", depthPtr));
       fprintf(fpout, "</%s>\n", name);
       MapSetAt(hInfo, "depthPtr", depthPtr);
   }
   def XMLFormatFile(ssFile)
   {
       hInfo = MapCreate();
       MapSetAt(hInfo, "depthPtr", 0);
       fp = fopen(ssFile, "rt")
       if (!fp) return FALSE;
       ss = fread(fp, "char");
       fclose(fp);
       fpout = fopen(ssFile + ".new", "w")
       MapSetAt(hInfo, "fpout", fpout);
       h = XML_ParserCreate()
       XML_SetStartElementHandler(h, "startElement");
       XML_SetEndElementHandler(h, "endElement");
       XML_SetCharacterDataHandler(h, "charData");
       XML_SetUserData(h, hInfo);
       bRet = XML_Parse(h, ss);
       if (bRet == 0) {
           nErrCode = XML_GetErrorCode(h);
           s = XML_ErrorString(nErrCode);
           nLine = XML_GetCurrentLineNumber(h)
           MessageBox(sprintf("Error:%d\n\n%s\n\nLine:%d", nErrCode, s, nLine));
       }
       XML_ParserFree(h);
       MapDestroy(hInfo);
       fclose(fpout);
       EdCreate(ssFile + ".new")
       return TRUE;
   }

.. us.makeindex   XML, XML

.. include:: ../ftab/XML.ftab

.. seealso::
   :ref:`uberblick-dateien`,
   :ref:`funktionen-eingeteilt-in-kategorien`

.. _copyright-expat:

Copyright Expat
---------------

::

   Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd
                                  and Clark Cooper

   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
   "Software"), to deal in the Software without restriction, including
   without limitation the rights to use, copy, modify, merge, publish,
   distribute, sublicense, and/or sell copies of the Software, and to
   permit persons to whom the Software is furnished to do so, subject to
   the following conditions:

   The above copyright notice and this permission notice shall be included
   in all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Weitere Informationen finden Sie unter
http://expat.sourceforge.net/.

:sub:`id-2051559`