1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */


#include <string.h>
#include <sal/types.h>
#include <rtl/alloc.h>
#include <rtl/ustring.hxx>
#include <rtl/string.hxx>
#include <rtl/ustrbuf.hxx>
#include <rtl/strbuf.hxx>
#include <tools/date.hxx>
#include <tools/time.hxx>
#include <tools/datetime.hxx>

#include <com/sun/star/uno/Reference.hxx>
#include <com/sun/star/uno/Sequence.hxx>
#include <com/sun/star/xforms/XModel.hpp>
#include <com/sun/star/xml/dom/XNode.hpp>
#include <com/sun/star/xml/dom/XDocument.hpp>
#include <com/sun/star/lang/XUnoTunnel.hpp>

#include <boost/lexical_cast.hpp>

#include "xpathlib.hxx"
#include "extension.hxx"

// C interface

using namespace com::sun::star::uno;
using namespace com::sun::star::xml::dom;
using namespace com::sun::star::xforms;
using namespace com::sun::star::lang;

xmlXPathFunction xforms_lookupFunc(void *, const xmlChar *xname, const xmlChar *)
{

    const char *name = reinterpret_cast<char const *>(xname);
    if (strcmp("boolean-from-string", name)==0)
        return xforms_booleanFromStringFunction;
    else if ((strcmp("if", name))==0)
        return xforms_ifFunction;
    else if ((strcmp("avg", name))==0)
        return xforms_avgFunction;
    else if ((strcmp("min", name))==0)
        return xforms_minFunction;
    else if ((strcmp("max", name))==0)
        return xforms_maxFunction;
    else if ((strcmp("count-non-empty", name))==0)
        return xforms_countNonEmptyFunction;
    else if ((strcmp("index", name))==0)
        return xforms_indexFunction;
    else if ((strcmp("property", name))==0)
        return xforms_propertyFunction;
    else if ((strcmp("now", name))==0)
        return xforms_nowFunction;
    else if ((strcmp("days-from-date", name))==0)
        return xforms_daysFromDateFunction;
    else if ((strcmp("seconds-from-dateTime", name))==0)
        return xforms_secondsFromDateTimeFunction;
    else if ((strcmp("seconds", name))==0)
        return xforms_secondsFuction;
    else if ((strcmp("months", name))==0)
        return xforms_monthsFuction;
    else if ((strcmp("instance", name))==0)
        return xforms_instanceFuction;
    else if ((strcmp("current", name))==0)
        return xforms_currentFunction;
    else
        return nullptr;
}

// boolean functions
void xforms_booleanFromStringFunction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_booleanFromStringFunction' is never used.
{
    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);
    xmlChar *pString = xmlXPathPopString(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    OUString aString(reinterpret_cast<char*>(pString), strlen(reinterpret_cast<char*>(pString)), RTL_TEXTENCODING_UTF8);
    if (aString.equalsIgnoreAsciiCase("true") ||
        aString.equalsIgnoreAsciiCase("1"))
        xmlXPathReturnTrue(ctxt);
    else if (aString.equalsIgnoreAsciiCase("false") ||
             aString.equalsIgnoreAsciiCase("0"))
        xmlXPathReturnFalse(ctxt);
    else
        XP_ERROR(XPATH_NUMBER_ERROR);
}

void xforms_ifFunction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_ifFunction' is never used.
{
    if (nargs != 3) XP_ERROR(XPATH_INVALID_ARITY);
    xmlChar *s2 = xmlXPathPopString(ctxt);

    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    xmlChar *s1 = xmlXPathPopString(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    bool aBool = xmlXPathPopBoolean(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);

    if (aBool)
        xmlXPathReturnString(ctxt, s1);
    else
        xmlXPathReturnString(ctxt, s2);

}

// Number Functions
void xforms_avgFunction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_avgFunction' is never used.
{
    // use sum(), div() and count()
    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);

    // save nodeset
    xmlXPathObjectPtr pObject = valuePop(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    //push back a copy
    valuePush(ctxt, xmlXPathObjectCopy(pObject));
    // get the Sum
    xmlXPathSumFunction(ctxt, 1);
    double nSum = xmlXPathPopNumber(ctxt);
    // push a copy once more
    valuePush(ctxt, xmlXPathObjectCopy(pObject));
    xmlXPathCountFunction(ctxt, 1);
    double nCount = xmlXPathPopNumber(ctxt);
    // push args for div()
    xmlXPathReturnNumber(ctxt, nSum);
    xmlXPathReturnNumber(ctxt, nCount);
    xmlXPathDivValues(ctxt);
    // the result is now on the ctxt stack
    xmlXPathFreeObject(pObject);
}

void xforms_minFunction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_minFunction' is never used.
{
    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);
    xmlNodeSetPtr pNodeSet = xmlXPathPopNodeSet(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    double nMinimum = 0;
    for (int i = 0; i <  xmlXPathNodeSetGetLength(pNodeSet); i++)
    {
        double nNumber = xmlXPathCastNodeToNumber(xmlXPathNodeSetItem(pNodeSet, i));
        if (xmlXPathIsNaN(nNumber))
        {
            xmlXPathReturnNumber(ctxt, xmlXPathNAN);
            return;
        }
        if (i == 0)
            nMinimum = nNumber;
        else if (nNumber < nMinimum)
            nMinimum = nNumber;
    }
    xmlXPathReturnNumber(ctxt, nMinimum);
}

void xforms_maxFunction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_maxFunction' is never used.
{
    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);
    xmlNodeSetPtr pNodeSet = xmlXPathPopNodeSet(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    double nMaximum = 0;
    for (int i = 0; i <  xmlXPathNodeSetGetLength(pNodeSet); i++)
    {
        double nNumber = xmlXPathCastNodeToNumber(xmlXPathNodeSetItem(pNodeSet, i));
        if (xmlXPathIsNaN(nNumber))
        {
            xmlXPathReturnNumber(ctxt, xmlXPathNAN);
            return;
        }
        if (i == 0)
            nMaximum = nNumber;
        else if (nNumber > nMaximum)
            nMaximum = nNumber;
    }
    xmlXPathReturnNumber(ctxt, nMaximum);
}
void xforms_countNonEmptyFunction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_countNonEmptyFunction' is never used.
{
    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);
    xmlNodeSetPtr pNodeSet = xmlXPathPopNodeSet(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    sal_Int32 nNotEmpty = 0;
    for (int i = 0; i <  xmlXPathNodeSetGetLength(pNodeSet); i++)
    {
        const xmlChar *aString = xmlXPathCastNodeToString(xmlXPathNodeSetItem(pNodeSet, i));
        if (*aString != 0) nNotEmpty++;
    }
    xmlXPathReturnNumber(ctxt, nNotEmpty);
}
void xforms_indexFunction(xmlXPathParserContextPtr /*ctxt*/, int /*nargs*/)<--- The function 'xforms_indexFunction' is never used.
{
    // function index takes a string argument that is the IDREF of a
    // 'repeat' and returns the current 1-based position of the repeat
    // index of the identified repeat -- see xforms/9.3.1

    // doc.getElementByID
    // (...)
}

// String Functions
void xforms_propertyFunction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_propertyFunction' is never used.
{
    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);
    xmlChar* pString = xmlXPathPopString(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    OUString aString(reinterpret_cast<char*>(pString), strlen(reinterpret_cast<char*>(pString)), RTL_TEXTENCODING_UTF8);
    if (aString.equalsIgnoreAsciiCase("version"))
        xmlXPathReturnString(ctxt, reinterpret_cast<xmlChar *>(const_cast<char *>("1.0")));
    else if (aString.equalsIgnoreAsciiCase("conformance-level"))
        xmlXPathReturnString(ctxt, reinterpret_cast<xmlChar *>(const_cast<char *>("conformance")));
    else
        xmlXPathReturnEmptyString(ctxt);
}

// Date and Time Functions

static OString makeDateTimeString (const DateTime& aDateTime)
{
    OStringBuffer aDateTimeString;
    aDateTimeString.append(static_cast<sal_Int32>(aDateTime.GetYear()));
    aDateTimeString.append("-");
    if (aDateTime.GetMonth()<10) aDateTimeString.append("0");
    aDateTimeString.append(static_cast<sal_Int32>(aDateTime.GetMonth()));
    aDateTimeString.append("-");
    if (aDateTime.GetDay()<10) aDateTimeString.append("0");
    aDateTimeString.append(static_cast<sal_Int32>(aDateTime.GetDay()));
    aDateTimeString.append("T");
    if (aDateTime.GetHour()<10) aDateTimeString.append("0");
    aDateTimeString.append(static_cast<sal_Int32>(aDateTime.GetHour()));
    aDateTimeString.append(":");
    if (aDateTime.GetMin()<10) aDateTimeString.append("0");
    aDateTimeString.append(static_cast<sal_Int32>(aDateTime.GetMin()));
    aDateTimeString.append(":");
    if (aDateTime.GetSec()<10) aDateTimeString.append("0");
    aDateTimeString.append(static_cast<sal_Int32>(aDateTime.GetSec()));
    aDateTimeString.append("Z");

    return aDateTimeString.makeStringAndClear();
}

// returns current system date and time in canonical xsd:dateTime
// format
void xforms_nowFunction(xmlXPathParserContextPtr ctxt, int /*nargs*/)<--- The function 'xforms_nowFunction' is never used.
{
    /*
    A single lexical representation, which is a subset of the lexical representations
    allowed by [ISO 8601], is allowed for dateTime. This lexical representation is the
    [ISO 8601] extended format CCYY-MM-DDThh:mm:ss where "CC" represents the century,
    "YY" the year, "MM" the month and "DD" the day, preceded by an optional leading "-"
    sign to indicate a negative number. If the sign is omitted, "+" is assumed. The letter
    "T" is the date/time separator and "hh", "mm", "ss" represent hour, minute and second
    respectively.
    */

    /*
    3.2.7.2 Canonical representation
    The canonical representation for dateTime is defined by prohibiting certain options
    from the Lexical representation (par.3.2.7.1). Specifically, either the time zone must
    be omitted or, if present, the time zone must be Coordinated Universal tools::Time (UTC)
    indicated by a "Z".
    */
    DateTime aDateTime( DateTime::SYSTEM );
    OString aDateTimeString = makeDateTimeString(aDateTime);
    xmlChar *pString = static_cast<xmlChar*>(xmlMalloc(aDateTimeString.getLength()+1));
    strncpy(reinterpret_cast<char*>(pString), aDateTimeString.getStr(), aDateTimeString.getLength());
    pString[aDateTimeString.getLength()] = 0;
    xmlXPathReturnString(ctxt, pString);
}

static bool parseDateTime(const OUString& aString, DateTime& aDateTime)
{
    // take apart a canonical literal xsd:dateTime string
    //CCYY-MM-DDThh:mm:ss(Z)

    OUString aDateTimeString = aString.trim();

    // check length
    if (aDateTimeString.getLength() < 19 || aDateTimeString.getLength() > 20)
        return false;

    sal_Int32 nDateLength = 10;
    sal_Int32 const nTimeLength = 8;

    OUString aDateString = aDateTimeString.copy(0, nDateLength);
    OUString aTimeString = aDateTimeString.copy(nDateLength+1, nTimeLength);

    sal_Int32 nIndex = 0;
    sal_Int32 nYear = aDateString.getToken(0, '-', nIndex).toInt32();
    sal_Int32 nMonth = aDateString.getToken(0, '-', nIndex).toInt32();
    sal_Int32 nDay = aDateString.getToken(0, '-', nIndex).toInt32();
    nIndex = 0;
    sal_Int32 nHour = aTimeString.getToken(0, ':', nIndex).toInt32();
    sal_Int32 nMinute = aTimeString.getToken(0, ':', nIndex).toInt32();
    sal_Int32 nSecond = aTimeString.getToken(0, ':', nIndex).toInt32();

    Date tmpDate(static_cast<sal_uInt16>(nDay), static_cast<sal_uInt16>(nMonth), static_cast<sal_uInt16>(nYear));
    tools::Time tmpTime(nHour, nMinute, nSecond);
    DateTime tmpDateTime(tmpDate, tmpTime);
    if (aString.indexOf("Z") < 0)
        tmpDateTime.ConvertToUTC();

    aDateTime = tmpDateTime;

    return true;
}


void xforms_daysFromDateFunction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_daysFromDateFunction' is never used.
{
    // number of days from 1970-01-01 to supplied xsd:date(Time)

    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);
    xmlChar* pString = xmlXPathPopString(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    OUString aString(reinterpret_cast<char*>(pString), strlen(reinterpret_cast<char*>(pString)), RTL_TEXTENCODING_UTF8);

    DateTime aDateTime( DateTime::EMPTY );
    if (parseDateTime(aString, aDateTime))
    {
        Date aReferenceDate(1, 1, 1970);
        sal_Int32 nDays = aDateTime - aReferenceDate;
        xmlXPathReturnNumber(ctxt, nDays);
    }
    else
        xmlXPathReturnNumber(ctxt, xmlXPathNAN);


}


void xforms_secondsFromDateTimeFunction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_secondsFromDateTimeFunction' is never used.
{
    // number of seconds from 1970-01-01T00:00:00Z to supplied xsd:date(Time)

    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);
    xmlChar* pString = xmlXPathPopString(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    OUString aString(reinterpret_cast<char*>(pString), strlen(reinterpret_cast<char*>(pString)), RTL_TEXTENCODING_UTF8);

    DateTime aDateTime( DateTime::EMPTY );

    if (parseDateTime(aString, aDateTime))
    {
        Date aReferenceDate(1, 1, 1970);
        sal_Int32 nDays = aDateTime - aReferenceDate;
        sal_Int32 nSeconds = nDays * 24 * 60 * 60;
        nSeconds += aDateTime.GetHour() * 60 * 60;
        nSeconds += aDateTime.GetMin() * 60;
        nSeconds += aDateTime.GetSec();
        xmlXPathReturnNumber(ctxt, nSeconds);
    }
    else
        xmlXPathReturnNumber(ctxt, xmlXPathNAN);

}

static bool parseDuration(const xmlChar* aString, bool& bNegative, sal_Int32& nYears, sal_Int32& nMonth, sal_Int32& nDays,
                              sal_Int32& nHours, sal_Int32& nMinutes, sal_Int32& nSeconds)
{
    bool bTime = false; // in part after T
    const xmlChar *pString = aString;

    if (pString[0] == '-') {
        bNegative = true;
        pString++;
    }

    if (pString[0] != 'P')
    {
        return false;
    }

    pString++;
    const xmlChar* pToken = pString;
    while(pToken[0] != 0)
    {
        switch(pToken[0]) {
        case 'Y':
            nYears = boost::lexical_cast<sal_Int32>(pString, pString-pToken);
            pString = ++pToken;
            break;
        case 'M':
            if (!bTime)
                nMonth = boost::lexical_cast<sal_Int32>(pString, pString-pToken);
            else
                nMinutes = boost::lexical_cast<sal_Int32>(pString, pString-pToken);
            pString = ++pToken;
            break;
        case 'D':
            nDays = boost::lexical_cast<sal_Int32>(pString, pString-pToken);
            pString = ++pToken;
            break;
        case 'H':
            nHours = boost::lexical_cast<sal_Int32>(pString, pString-pToken);
            pString = ++pToken;
            break;
        case 'S':
            nSeconds = boost::lexical_cast<sal_Int32>(pString, pString-pToken);
            pString = ++pToken;
            break;
        case 'T':
            bTime = true;
            pString = ++pToken;
            break;
        default:
            pToken++;
        }
    }
    return true;
}

void xforms_secondsFuction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_secondsFuction' is never used.
{
    // convert a xsd:duration to seconds
    // (-)PnYnMnDTnHnMnS
    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);
    xmlChar* pString = xmlXPathPopString(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);

    bool bNegative = false;
    sal_Int32 nYears = 0;
    sal_Int32 nMonths = 0;
    sal_Int32 nDays = 0;
    sal_Int32 nHours = 0;
    sal_Int32 nMinutes = 0;
    sal_Int32 nSeconds = 0;

    if (parseDuration(pString, bNegative, nYears, nMonths, nDays, nHours, nMinutes, nSeconds))
    {
        nSeconds += nMinutes*60;
        nSeconds += nHours*60*60;
        nSeconds += nDays*24*60*60;
        // year and month are ignored according to spec
        if (bNegative)
            nSeconds = 0 - nSeconds;
        xmlXPathReturnNumber(ctxt, nSeconds);
    }
    else
        xmlXPathReturnNumber(ctxt, xmlXPathNAN);
}

void xforms_monthsFuction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_monthsFuction' is never used.
{
    // convert a xsd:duration to seconds
    // (-)PnYnMnDTnHnMnS
    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);
    xmlChar* pString = xmlXPathPopString(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);

    bool bNegative = false;
    sal_Int32 nYears = 0;
    sal_Int32 nMonths = 0;
    sal_Int32 nDays = 0;
    sal_Int32 nHours = 0;
    sal_Int32 nMinutes = 0;
    sal_Int32 nSeconds = 0;

    if (parseDuration(pString, bNegative, nYears, nMonths, nDays, nHours, nMinutes, nSeconds))
    {
        nMonths += nYears*12;
        // Days, Hours, Minutes and seconds are ignored, see spec
        if (bNegative)
            nMonths = 0 - nMonths;
        xmlXPathReturnNumber(ctxt, nMonths);
    }
    else
        xmlXPathReturnNumber(ctxt, xmlXPathNAN);

}

// Node-set Functions
void xforms_instanceFuction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_instanceFuction' is never used.
{
    if (nargs != 1) XP_ERROR(XPATH_INVALID_ARITY);
    xmlChar *pString = xmlXPathPopString(ctxt);
    if (xmlXPathCheckError(ctxt)) XP_ERROR(XPATH_INVALID_TYPE);
    OUString aString(reinterpret_cast<char*>(pString), strlen(reinterpret_cast<char*>(pString)), RTL_TEXTENCODING_UTF8);

    Reference< XModel > aModel = static_cast<CLibxml2XFormsExtension*>(ctxt->context->funcLookupData)->getModel();
    if (aModel.is())
    {
        Reference< XDocument > aInstance = aModel->getInstanceDocument(aString);
        if (aInstance.is())
        {
            try {
                // xmlXPathObjectPtr xmlXPathNewNodeSet        (xmlNodePtr val);
                Reference< XUnoTunnel > aTunnel(aInstance, UNO_QUERY_THROW);
                xmlNodePtr pNode = reinterpret_cast< xmlNodePtr >( aTunnel->getSomething(Sequence< sal_Int8 >()) );
                xmlXPathObjectPtr pObject = xmlXPathNewNodeSet(pNode);
                xmlXPathReturnNodeSet(ctxt, pObject->nodesetval);
            } catch (const RuntimeException&)
            {
                xmlXPathReturnEmptyNodeSet(ctxt);
            }
        }
        else
            xmlXPathReturnEmptyNodeSet(ctxt);
    }
    else
        xmlXPathReturnEmptyNodeSet(ctxt);

}

// Node-set Functions, XForms 1.1
void xforms_currentFunction(xmlXPathParserContextPtr ctxt, int nargs)<--- The function 'xforms_currentFunction' is never used.
{
    if (nargs != 0) XP_ERROR(XPATH_INVALID_ARITY);

    Reference< XNode > aNode = static_cast<CLibxml2XFormsExtension*>(ctxt->context->funcLookupData)->getContextNode();

    if (aNode.is())
    {
        try {
            Reference< XUnoTunnel > aTunnel(aNode, UNO_QUERY_THROW);
            xmlNodePtr pNode = reinterpret_cast< xmlNodePtr >( aTunnel->getSomething(Sequence< sal_Int8 >()) );
            xmlXPathObjectPtr pObject = xmlXPathNewNodeSet(pNode);
            xmlXPathReturnNodeSet(ctxt, pObject->nodesetval);
        }
        catch (const RuntimeException&)
        {
            xmlXPathReturnEmptyNodeSet(ctxt);
        }
    }
    else
        xmlXPathReturnEmptyNodeSet(ctxt);
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */