dlls/msxml3/selection.c

   1 /*
   2  *    XPath/XSLPattern query result node list implementation
   3  *
   4  * Copyright 2005 Mike McCormack
   5  * Copyright 2007 Mikolaj Zalewski
   6  * Copyright 2010 Adam Martinson for CodeWeavers
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #define COBJMACROS
  24
  25 #include "config.h"
  26
  27 #include <stdarg.h>
  28 #ifdef HAVE_LIBXML2
  29 # include <libxml/parser.h>
  30 # include <libxml/xmlerror.h>
  31 # include <libxml/xpath.h>
  32 # include <libxml/xpathInternals.h>
  33 #endif
  34
  35 #include "windef.h"
  36 #include "winbase.h"
  37 #include "winuser.h"
  38 #include "ole2.h"
  39 #include "msxml6.h"
  40 #include "msxml2did.h"
  41
  42 #include "msxml_private.h"
  43
  44 #include "wine/debug.h"
  45
  46 /* This file implements the object returned by a XPath query. Note that this is
  47  * not the IXMLDOMNodeList returned by childNodes - it's implemented in nodelist.c.
  48  * They are different because the list returned by XPath queries:
  49  *  - is static - gives the results for the XML tree as it existed during the
  50  *    execution of the query
  51  *  - supports IXMLDOMSelection
  52  *
  53  */
  54
  55 #ifdef HAVE_LIBXML2
  56
  57 WINE_DEFAULT_DEBUG_CHANNEL(msxml);
  58
  59 int registerNamespaces(xmlXPathContextPtr ctxt);
  60 xmlChar* XSLPattern_to_XPath(xmlXPathContextPtr ctxt, xmlChar const* xslpat_str);
  61
  62 typedef struct
  63 {
  64     IEnumVARIANT IEnumVARIANT_iface;
  65     LONG ref;
  66
  67     IUnknown *outer;
  68     BOOL own;
  69
  70     LONG pos;
  71
  72     const struct enumvariant_funcs *funcs;
  73 } enumvariant;
  74
  75 typedef struct
  76 {
  77     DispatchEx dispex;
  78     IXMLDOMSelection IXMLDOMSelection_iface;
  79     LONG ref;
  80     xmlNodePtr node;
  81     xmlXPathObjectPtr result;
  82     int resultPos;
  83     IEnumVARIANT *enumvariant;
  84 } domselection;
  85
  86 static HRESULT selection_get_item(IUnknown *iface, LONG index, VARIANT* item)
  87 {
  88     V_VT(item) = VT_DISPATCH;
  89     return IXMLDOMSelection_get_item((IXMLDOMSelection*)iface, index, (IXMLDOMNode**)&V_DISPATCH(item));
  90 }
  91
  92 static HRESULT selection_next(IUnknown *iface)
  93 {
  94     IXMLDOMNode *node;
  95     HRESULT hr = IXMLDOMSelection_nextNode((IXMLDOMSelection*)iface, &node);
  96     if (hr == S_OK) IXMLDOMNode_Release(node);
  97     return hr;
  98 }
  99
 100 static const struct enumvariant_funcs selection_enumvariant = {
 101     selection_get_item,
 102     selection_next
 103 };
 104
 105 static inline domselection *impl_from_IXMLDOMSelection( IXMLDOMSelection *iface )
 106 {
 107     return CONTAINING_RECORD(iface, domselection, IXMLDOMSelection_iface);
 108 }
 109
 110 static inline enumvariant *impl_from_IEnumVARIANT( IEnumVARIANT *iface )
 111 {
 112     return CONTAINING_RECORD(iface, enumvariant, IEnumVARIANT_iface);
 113 }
 114
 115 static HRESULT WINAPI domselection_QueryInterface(
 116     IXMLDOMSelection *iface,
 117     REFIID riid,
 118     void** ppvObject )
 119 {
 120     domselection *This = impl_from_IXMLDOMSelection( iface );
 121
 122     TRACE("(%p)->(%s %p)\n", iface, debugstr_guid(riid), ppvObject);
 123
 124     if(!ppvObject)
 125         return E_INVALIDARG;
 126
 127     if ( IsEqualGUID( riid, &IID_IUnknown ) ||
 128          IsEqualGUID( riid, &IID_IXMLDOMNodeList ) ||
 129          IsEqualGUID( riid, &IID_IXMLDOMSelection ))
 130     {
 131         *ppvObject = &This->IXMLDOMSelection_iface;
 132     }
 133     else if (IsEqualGUID( riid, &IID_IEnumVARIANT ))
 134     {
 135         if (!This->enumvariant)
 136         {
 137             HRESULT hr = create_enumvariant((IUnknown*)iface, FALSE, &selection_enumvariant, &This->enumvariant);
 138             if (FAILED(hr)) return hr;
 139         }
 140
 141         return IEnumVARIANT_QueryInterface(This->enumvariant, &IID_IEnumVARIANT, ppvObject);
 142     }
 143     else if (dispex_query_interface(&This->dispex, riid, ppvObject))
 144     {
 145         return *ppvObject ? S_OK : E_NOINTERFACE;
 146     }
 147     else
 148     {
 149         TRACE("interface %s not implemented\n", debugstr_guid(riid));
 150         *ppvObject = NULL;
 151         return E_NOINTERFACE;
 152     }
 153
 154     IXMLDOMSelection_AddRef( iface );
 155
 156     return S_OK;
 157 }
 158
 159 static ULONG WINAPI domselection_AddRef(
 160     IXMLDOMSelection *iface )
 161 {
 162     domselection *This = impl_from_IXMLDOMSelection( iface );
 163     ULONG ref = InterlockedIncrement( &This->ref );
 164     TRACE("(%p)->(%d)\n", This, ref);
 165     return ref;
 166 }
 167
 168 static ULONG WINAPI domselection_Release(
 169     IXMLDOMSelection *iface )
 170 {
 171     domselection *This = impl_from_IXMLDOMSelection( iface );
 172     ULONG ref = InterlockedDecrement(&This->ref);
 173
 174     TRACE("(%p)->(%d)\n", This, ref);
 175     if ( ref == 0 )
 176     {
 177         xmlXPathFreeObject(This->result);
 178         xmldoc_release(This->node->doc);
 179         if (This->enumvariant) IEnumVARIANT_Release(This->enumvariant);
 180         heap_free(This);
 181     }
 182
 183     return ref;
 184 }
 185
 186 static HRESULT WINAPI domselection_GetTypeInfoCount(
 187     IXMLDOMSelection *iface,
 188     UINT* pctinfo )
 189 {
 190     domselection *This = impl_from_IXMLDOMSelection( iface );
 191     return IDispatchEx_GetTypeInfoCount(&This->dispex.IDispatchEx_iface, pctinfo);
 192 }
 193
 194 static HRESULT WINAPI domselection_GetTypeInfo(
 195     IXMLDOMSelection *iface,
 196     UINT iTInfo,
 197     LCID lcid,
 198     ITypeInfo** ppTInfo )
 199 {
 200     domselection *This = impl_from_IXMLDOMSelection( iface );
 201     return IDispatchEx_GetTypeInfo(&This->dispex.IDispatchEx_iface,
 202         iTInfo, lcid, ppTInfo);
 203 }
 204
 205 static HRESULT WINAPI domselection_GetIDsOfNames(
 206     IXMLDOMSelection *iface,
 207     REFIID riid,
 208     LPOLESTR* rgszNames,
 209     UINT cNames,
 210     LCID lcid,
 211     DISPID* rgDispId )
 212 {
 213     domselection *This = impl_from_IXMLDOMSelection( iface );
 214     return IDispatchEx_GetIDsOfNames(&This->dispex.IDispatchEx_iface,
 215         riid, rgszNames, cNames, lcid, rgDispId);
 216 }
 217
 218 static HRESULT WINAPI domselection_Invoke(
 219     IXMLDOMSelection *iface,
 220     DISPID dispIdMember,
 221     REFIID riid,
 222     LCID lcid,
 223     WORD wFlags,
 224     DISPPARAMS* pDispParams,
 225     VARIANT* pVarResult,
 226     EXCEPINFO* pExcepInfo,
 227     UINT* puArgErr )
 228 {
 229     domselection *This = impl_from_IXMLDOMSelection( iface );
 230     return IDispatchEx_Invoke(&This->dispex.IDispatchEx_iface,
 231         dispIdMember, riid, lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
 232 }
 233
 234 static HRESULT WINAPI domselection_get_item(
 235         IXMLDOMSelection* iface,
 236         LONG index,
 237         IXMLDOMNode** listItem)
 238 {
 239     domselection *This = impl_from_IXMLDOMSelection( iface );
 240
 241     TRACE("(%p)->(%d %p)\n", This, index, listItem);
 242
 243     if(!listItem)
 244         return E_INVALIDARG;
 245
 246     *listItem = NULL;
 247
 248     if (index < 0 || index >= xmlXPathNodeSetGetLength(This->result->nodesetval))
 249         return S_FALSE;
 250
 251     *listItem = create_node(xmlXPathNodeSetItem(This->result->nodesetval, index));
 252     This->resultPos = index + 1;
 253
 254     return S_OK;
 255 }
 256
 257 static HRESULT WINAPI domselection_get_length(
 258         IXMLDOMSelection* iface,
 259         LONG* listLength)
 260 {
 261     domselection *This = impl_from_IXMLDOMSelection( iface );
 262
 263     TRACE("(%p)->(%p)\n", This, listLength);
 264
 265     if(!listLength)
 266         return E_INVALIDARG;
 267
 268     *listLength = xmlXPathNodeSetGetLength(This->result->nodesetval);
 269     return S_OK;
 270 }
 271
 272 static HRESULT WINAPI domselection_nextNode(
 273         IXMLDOMSelection* iface,
 274         IXMLDOMNode** nextItem)
 275 {
 276     domselection *This = impl_from_IXMLDOMSelection( iface );
 277
 278     TRACE("(%p)->(%p)\n", This, nextItem );
 279
 280     if(!nextItem)
 281         return E_INVALIDARG;
 282
 283     *nextItem = NULL;
 284
 285     if (This->resultPos >= xmlXPathNodeSetGetLength(This->result->nodesetval))
 286         return S_FALSE;
 287
 288     *nextItem = create_node(xmlXPathNodeSetItem(This->result->nodesetval, This->resultPos));
 289     This->resultPos++;
 290     return S_OK;
 291 }
 292
 293 static HRESULT WINAPI domselection_reset(
 294         IXMLDOMSelection* iface)
 295 {
 296     domselection *This = impl_from_IXMLDOMSelection( iface );
 297
 298     TRACE("%p\n", This);
 299     This->resultPos = 0;
 300     return S_OK;
 301 }
 302
 303 static HRESULT WINAPI domselection_get__newEnum(
 304         IXMLDOMSelection* iface,
 305         IUnknown** enumv)
 306 {
 307     domselection *This = impl_from_IXMLDOMSelection( iface );
 308
 309     TRACE("(%p)->(%p)\n", This, enumv);
 310
 311     return create_enumvariant((IUnknown*)iface, TRUE, &selection_enumvariant, (IEnumVARIANT**)enumv);
 312 }
 313
 314 static HRESULT WINAPI domselection_get_expr(
 315         IXMLDOMSelection* iface,
 316         BSTR *p)
 317 {
 318     domselection *This = impl_from_IXMLDOMSelection( iface );
 319     FIXME("(%p)->(%p)\n", This, p);
 320     return E_NOTIMPL;
 321 }
 322
 323 static HRESULT WINAPI domselection_put_expr(
 324         IXMLDOMSelection* iface,
 325         BSTR p)
 326 {
 327     domselection *This = impl_from_IXMLDOMSelection( iface );
 328     FIXME("(%p)->(%s)\n", This, debugstr_w(p));
 329     return E_NOTIMPL;
 330 }
 331
 332 static HRESULT WINAPI domselection_get_context(
 333         IXMLDOMSelection* iface,
 334         IXMLDOMNode **node)
 335 {
 336     domselection *This = impl_from_IXMLDOMSelection( iface );
 337     FIXME("(%p)->(%p)\n", This, node);
 338     return E_NOTIMPL;
 339 }
 340
 341 static HRESULT WINAPI domselection_putref_context(
 342         IXMLDOMSelection* iface,
 343         IXMLDOMNode *node)
 344 {
 345     domselection *This = impl_from_IXMLDOMSelection( iface );
 346     FIXME("(%p)->(%p)\n", This, node);
 347     return E_NOTIMPL;
 348 }
 349
 350 static HRESULT WINAPI domselection_peekNode(
 351         IXMLDOMSelection* iface,
 352         IXMLDOMNode **node)
 353 {
 354     domselection *This = impl_from_IXMLDOMSelection( iface );
 355     FIXME("(%p)->(%p)\n", This, node);
 356     return E_NOTIMPL;
 357 }
 358
 359 static HRESULT WINAPI domselection_matches(
 360         IXMLDOMSelection* iface,
 361         IXMLDOMNode *node,
 362         IXMLDOMNode **out_node)
 363 {
 364     domselection *This = impl_from_IXMLDOMSelection( iface );
 365     FIXME("(%p)->(%p %p)\n", This, node, out_node);
 366     return E_NOTIMPL;
 367 }
 368
 369 static HRESULT WINAPI domselection_removeNext(
 370         IXMLDOMSelection* iface,
 371         IXMLDOMNode **node)
 372 {
 373     domselection *This = impl_from_IXMLDOMSelection( iface );
 374     FIXME("(%p)->(%p)\n", This, node);
 375     return E_NOTIMPL;
 376 }
 377
 378 static HRESULT WINAPI domselection_removeAll(
 379         IXMLDOMSelection* iface)
 380 {
 381     domselection *This = impl_from_IXMLDOMSelection( iface );
 382     FIXME("(%p)\n", This);
 383     return E_NOTIMPL;
 384 }
 385
 386 static HRESULT WINAPI domselection_clone(
 387         IXMLDOMSelection* iface,
 388         IXMLDOMSelection **node)
 389 {
 390     domselection *This = impl_from_IXMLDOMSelection( iface );
 391     FIXME("(%p)->(%p)\n", This, node);
 392     return E_NOTIMPL;
 393 }
 394
 395 static HRESULT WINAPI domselection_getProperty(
 396         IXMLDOMSelection* iface,
 397         BSTR p,
 398         VARIANT *var)
 399 {
 400     domselection *This = impl_from_IXMLDOMSelection( iface );
 401     FIXME("(%p)->(%s %p)\n", This, debugstr_w(p), var);
 402     return E_NOTIMPL;
 403 }
 404
 405 static HRESULT WINAPI domselection_setProperty(
 406         IXMLDOMSelection* iface,
 407         BSTR p,
 408         VARIANT var)
 409 {
 410     domselection *This = impl_from_IXMLDOMSelection( iface );
 411     FIXME("(%p)->(%s %s)\n", This, debugstr_w(p), debugstr_variant(&var));
 412     return E_NOTIMPL;
 413 }
 414
 415 static const struct IXMLDOMSelectionVtbl domselection_vtbl =
 416 {
 417     domselection_QueryInterface,
 418     domselection_AddRef,
 419     domselection_Release,
 420     domselection_GetTypeInfoCount,
 421     domselection_GetTypeInfo,
 422     domselection_GetIDsOfNames,
 423     domselection_Invoke,
 424     domselection_get_item,
 425     domselection_get_length,
 426     domselection_nextNode,
 427     domselection_reset,
 428     domselection_get__newEnum,
 429     domselection_get_expr,
 430     domselection_put_expr,
 431     domselection_get_context,
 432     domselection_putref_context,
 433     domselection_peekNode,
 434     domselection_matches,
 435     domselection_removeNext,
 436     domselection_removeAll,
 437     domselection_clone,
 438     domselection_getProperty,
 439     domselection_setProperty
 440 };
 441
 442 /* IEnumVARIANT support */
 443 static HRESULT WINAPI enumvariant_QueryInterface(
 444     IEnumVARIANT *iface,
 445     REFIID riid,
 446     void** ppvObject )
 447 {
 448     enumvariant *This = impl_from_IEnumVARIANT( iface );
 449
 450     TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppvObject);
 451
 452     *ppvObject = NULL;
 453
 454     if (IsEqualGUID( riid, &IID_IUnknown ))
 455     {
 456         if (This->own)
 457             *ppvObject = &This->IEnumVARIANT_iface;
 458         else
 459             return IUnknown_QueryInterface(This->outer, riid, ppvObject);
 460     }
 461     else if (IsEqualGUID( riid, &IID_IEnumVARIANT ))
 462     {
 463         *ppvObject = &This->IEnumVARIANT_iface;
 464     }
 465     else
 466         return IUnknown_QueryInterface(This->outer, riid, ppvObject);
 467
 468     IEnumVARIANT_AddRef( iface );
 469
 470     return S_OK;
 471 }
 472
 473 static ULONG WINAPI enumvariant_AddRef(IEnumVARIANT *iface )
 474 {
 475     enumvariant *This = impl_from_IEnumVARIANT( iface );
 476     ULONG ref = InterlockedIncrement( &This->ref );
 477     TRACE("(%p)->(%d)\n", This, ref);
 478     return ref;
 479 }
 480
 481 static ULONG WINAPI enumvariant_Release(IEnumVARIANT *iface )
 482 {
 483     enumvariant *This = impl_from_IEnumVARIANT( iface );
 484     ULONG ref = InterlockedDecrement(&This->ref);
 485
 486     TRACE("(%p)->(%d)\n", This, ref);
 487     if ( ref == 0 )
 488     {
 489         if (This->own) IUnknown_Release(This->outer);
 490         heap_free(This);
 491     }
 492
 493     return ref;
 494 }
 495
 496 static HRESULT WINAPI enumvariant_Next(
 497     IEnumVARIANT *iface,
 498     ULONG celt,
 499     VARIANT *var,
 500     ULONG *fetched)
 501 {
 502     enumvariant *This = impl_from_IEnumVARIANT( iface );
 503     ULONG ret_count = 0;
 504
 505     TRACE("(%p)->(%u %p %p)\n", This, celt, var, fetched);
 506
 507     if (fetched) *fetched = 0;
 508
 509     if (celt && !var) return E_INVALIDARG;
 510
 511     for (; celt > 0; celt--, var++, This->pos++)
 512     {
 513         HRESULT hr = This->funcs->get_item(This->outer, This->pos, var);
 514         if (hr != S_OK)
 515         {
 516             V_VT(var) = VT_EMPTY;
 517             break;
 518         }
 519         ret_count++;
 520     }
 521
 522     if (fetched) *fetched = ret_count;
 523
 524     /* we need to advance one step more for some reason */
 525     if (ret_count)
 526     {
 527         if (This->funcs->next)
 528             This->funcs->next(This->outer);
 529     }
 530
 531     return celt == 0 ? S_OK : S_FALSE;
 532 }
 533
 534 static HRESULT WINAPI enumvariant_Skip(
 535     IEnumVARIANT *iface,
 536     ULONG celt)
 537 {
 538     enumvariant *This = impl_from_IEnumVARIANT( iface );
 539     FIXME("(%p)->(%u): stub\n", This, celt);
 540     return E_NOTIMPL;
 541 }
 542
 543 static HRESULT WINAPI enumvariant_Reset(IEnumVARIANT *iface)
 544 {
 545     enumvariant *This = impl_from_IEnumVARIANT( iface );
 546
 547     TRACE("%p\n", This);
 548     This->pos = 0;
 549     return S_OK;
 550 }
 551
 552 static HRESULT WINAPI enumvariant_Clone(
 553     IEnumVARIANT *iface, IEnumVARIANT **ppenum)
 554 {
 555     enumvariant *This = impl_from_IEnumVARIANT( iface );
 556     FIXME("(%p)->(%p): stub\n", This, ppenum);
 557     return E_NOTIMPL;
 558 }
 559
 560 static const struct IEnumVARIANTVtbl EnumVARIANTVtbl =
 561 {
 562     enumvariant_QueryInterface,
 563     enumvariant_AddRef,
 564     enumvariant_Release,
 565     enumvariant_Next,
 566     enumvariant_Skip,
 567     enumvariant_Reset,
 568     enumvariant_Clone
 569 };
 570
 571 HRESULT create_enumvariant(IUnknown *outer, BOOL own, const struct enumvariant_funcs *funcs, IEnumVARIANT **penum)
 572 {
 573     enumvariant *This;
 574
 575     This = heap_alloc(sizeof(enumvariant));
 576     if (!This) return E_OUTOFMEMORY;
 577
 578     This->IEnumVARIANT_iface.lpVtbl = &EnumVARIANTVtbl;
 579     This->ref = 0;
 580     This->outer = outer;
 581     This->own = own;
 582     This->pos = 0;
 583     This->funcs = funcs;
 584
 585     if (This->own)
 586         IUnknown_AddRef(This->outer);
 587
 588     *penum = &This->IEnumVARIANT_iface;
 589     IEnumVARIANT_AddRef(*penum);
 590     return S_OK;
 591 }
 592
 593 static HRESULT domselection_get_dispid(IUnknown *iface, BSTR name, DWORD flags, DISPID *dispid)
 594 {
 595     WCHAR *ptr;
 596     int idx = 0;
 597
 598     for(ptr = name; *ptr >= '0' && *ptr <= '9'; ptr++)
 599         idx = idx*10 + (*ptr-'0');
 600     if(*ptr)
 601         return DISP_E_UNKNOWNNAME;
 602
 603     *dispid = DISPID_DOM_COLLECTION_BASE + idx;
 604     TRACE("ret %x\n", *dispid);
 605     return S_OK;
 606 }
 607
 608 static HRESULT domselection_invoke(IUnknown *iface, DISPID id, LCID lcid, WORD flags, DISPPARAMS *params,
 609         VARIANT *res, EXCEPINFO *ei)
 610 {
 611     domselection *This = impl_from_IXMLDOMSelection( (IXMLDOMSelection*)iface );
 612
 613     TRACE("(%p)->(%x %x %x %p %p %p)\n", This, id, lcid, flags, params, res, ei);
 614
 615     V_VT(res) = VT_DISPATCH;
 616     V_DISPATCH(res) = NULL;
 617
 618     if (id < DISPID_DOM_COLLECTION_BASE || id > DISPID_DOM_COLLECTION_MAX)
 619         return DISP_E_UNKNOWNNAME;
 620
 621     switch(flags)
 622     {
 623         case INVOKE_PROPERTYGET:
 624         {
 625             IXMLDOMNode *disp = NULL;
 626
 627             IXMLDOMSelection_get_item(&This->IXMLDOMSelection_iface, id - DISPID_DOM_COLLECTION_BASE, &disp);
 628             V_DISPATCH(res) = (IDispatch*)disp;
 629             break;
 630         }
 631         default:
 632         {
 633             FIXME("unimplemented flags %x\n", flags);
 634             break;
 635         }
 636     }
 637
 638     TRACE("ret %p\n", V_DISPATCH(res));
 639
 640     return S_OK;
 641 }
 642
 643 static const dispex_static_data_vtbl_t domselection_dispex_vtbl = {
 644     domselection_get_dispid,
 645     domselection_invoke
 646 };
 647
 648 static const tid_t domselection_iface_tids[] = {
 649     IXMLDOMSelection_tid,
 650     0
 651 };
 652 static dispex_static_data_t domselection_dispex = {
 653     &domselection_dispex_vtbl,
 654     IXMLDOMSelection_tid,
 655     NULL,
 656     domselection_iface_tids
 657 };
 658
 659 #define XSLPATTERN_CHECK_ARGS(n) \
 660     if (nargs != n) { \
 661         FIXME("XSLPattern syntax error: Expected %i arguments, got %i\n", n, nargs); \
 662         xmlXPathSetArityError(pctx); \
 663         return; \
 664     }
 665
 666
 667 static void XSLPattern_index(xmlXPathParserContextPtr pctx, int nargs)
 668 {
 669     XSLPATTERN_CHECK_ARGS(0);
 670
 671     xmlXPathPositionFunction(pctx, 0);
 672     xmlXPathReturnNumber(pctx, xmlXPathPopNumber(pctx) - 1.0);
 673 }
 674
 675 static void XSLPattern_end(xmlXPathParserContextPtr pctx, int nargs)
 676 {
 677     double pos, last;
 678     XSLPATTERN_CHECK_ARGS(0);
 679
 680     xmlXPathPositionFunction(pctx, 0);
 681     pos = xmlXPathPopNumber(pctx);
 682     xmlXPathLastFunction(pctx, 0);
 683     last = xmlXPathPopNumber(pctx);
 684     xmlXPathReturnBoolean(pctx, pos == last);
 685 }
 686
 687 static void XSLPattern_nodeType(xmlXPathParserContextPtr pctx, int nargs)
 688 {
 689     XSLPATTERN_CHECK_ARGS(0);
 690     xmlXPathReturnNumber(pctx, pctx->context->node->type);
 691 }
 692
 693 static void XSLPattern_OP_IEq(xmlXPathParserContextPtr pctx, int nargs)
 694 {
 695     xmlChar *arg1, *arg2;
 696     XSLPATTERN_CHECK_ARGS(2);
 697
 698     arg2 = xmlXPathPopString(pctx);
 699     arg1 = xmlXPathPopString(pctx);
 700     xmlXPathReturnBoolean(pctx, xmlStrcasecmp(arg1, arg2) == 0);
 701     xmlFree(arg1);
 702     xmlFree(arg2);
 703 }
 704
 705 static void XSLPattern_OP_INEq(xmlXPathParserContextPtr pctx, int nargs)
 706 {
 707     xmlChar *arg1, *arg2;
 708     XSLPATTERN_CHECK_ARGS(2);
 709
 710     arg2 = xmlXPathPopString(pctx);
 711     arg1 = xmlXPathPopString(pctx);
 712     xmlXPathReturnBoolean(pctx, xmlStrcasecmp(arg1, arg2) != 0);
 713     xmlFree(arg1);
 714     xmlFree(arg2);
 715 }
 716
 717 static void XSLPattern_OP_ILt(xmlXPathParserContextPtr pctx, int nargs)
 718 {
 719     xmlChar *arg1, *arg2;
 720     XSLPATTERN_CHECK_ARGS(2);
 721
 722     arg2 = xmlXPathPopString(pctx);
 723     arg1 = xmlXPathPopString(pctx);
 724     xmlXPathReturnBoolean(pctx, xmlStrcasecmp(arg1, arg2) < 0);
 725     xmlFree(arg1);
 726     xmlFree(arg2);
 727 }
 728
 729 static void XSLPattern_OP_ILEq(xmlXPathParserContextPtr pctx, int nargs)
 730 {
 731     xmlChar *arg1, *arg2;
 732     XSLPATTERN_CHECK_ARGS(2);
 733
 734     arg2 = xmlXPathPopString(pctx);
 735     arg1 = xmlXPathPopString(pctx);
 736     xmlXPathReturnBoolean(pctx, xmlStrcasecmp(arg1, arg2) <= 0);
 737     xmlFree(arg1);
 738     xmlFree(arg2);
 739 }
 740
 741 static void XSLPattern_OP_IGt(xmlXPathParserContextPtr pctx, int nargs)
 742 {
 743     xmlChar *arg1, *arg2;
 744     XSLPATTERN_CHECK_ARGS(2);
 745
 746     arg2 = xmlXPathPopString(pctx);
 747     arg1 = xmlXPathPopString(pctx);
 748     xmlXPathReturnBoolean(pctx, xmlStrcasecmp(arg1, arg2) > 0);
 749     xmlFree(arg1);
 750     xmlFree(arg2);
 751 }
 752
 753 static void XSLPattern_OP_IGEq(xmlXPathParserContextPtr pctx, int nargs)
 754 {
 755     xmlChar *arg1, *arg2;
 756     XSLPATTERN_CHECK_ARGS(2);
 757
 758     arg2 = xmlXPathPopString(pctx);
 759     arg1 = xmlXPathPopString(pctx);
 760     xmlXPathReturnBoolean(pctx, xmlStrcasecmp(arg1, arg2) >= 0);
 761     xmlFree(arg1);
 762     xmlFree(arg2);
 763 }
 764
 765 static void query_serror(void* ctx, xmlErrorPtr err)
 766 {
 767     LIBXML2_CALLBACK_SERROR(domselection_create, err);
 768 }
 769
 770 HRESULT create_selection(xmlNodePtr node, xmlChar* query, IXMLDOMNodeList **out)
 771 {
 772     domselection *This = heap_alloc(sizeof(domselection));
 773     xmlXPathContextPtr ctxt = xmlXPathNewContext(node->doc);
 774     HRESULT hr;
 775
 776     TRACE("(%p, %s, %p)\n", node, debugstr_a((char const*)query), out);
 777
 778     *out = NULL;
 779     if (!This || !ctxt || !query)
 780     {
 781         xmlXPathFreeContext(ctxt);
 782         heap_free(This);
 783         return E_OUTOFMEMORY;
 784     }
 785
 786     This->IXMLDOMSelection_iface.lpVtbl = &domselection_vtbl;
 787     This->ref = 1;
 788     This->resultPos = 0;
 789     This->node = node;
 790     This->enumvariant = NULL;
 791     init_dispex(&This->dispex, (IUnknown*)&This->IXMLDOMSelection_iface, &domselection_dispex);
 792     xmldoc_add_ref(This->node->doc);
 793
 794     ctxt->error = query_serror;
 795     ctxt->node = node;
 796     registerNamespaces(ctxt);
 797
 798     if (is_xpathmode(This->node->doc))
 799     {
 800         xmlXPathRegisterAllFunctions(ctxt);
 801         This->result = xmlXPathEvalExpression(query, ctxt);
 802     }
 803     else
 804     {
 805         xmlChar* pattern_query = XSLPattern_to_XPath(ctxt, query);
 806
 807         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"not", xmlXPathNotFunction);
 808         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"boolean", xmlXPathBooleanFunction);
 809
 810         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"index", XSLPattern_index);
 811         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"end", XSLPattern_end);
 812         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"nodeType", XSLPattern_nodeType);
 813
 814         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"OP_IEq", XSLPattern_OP_IEq);
 815         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"OP_INEq", XSLPattern_OP_INEq);
 816         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"OP_ILt", XSLPattern_OP_ILt);
 817         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"OP_ILEq", XSLPattern_OP_ILEq);
 818         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"OP_IGt", XSLPattern_OP_IGt);
 819         xmlXPathRegisterFunc(ctxt, (xmlChar const*)"OP_IGEq", XSLPattern_OP_IGEq);
 820
 821         This->result = xmlXPathEvalExpression(pattern_query, ctxt);
 822         xmlFree(pattern_query);
 823     }
 824
 825     if (!This->result || This->result->type != XPATH_NODESET)
 826     {
 827         hr = E_FAIL;
 828         goto cleanup;
 829     }
 830
 831     *out = (IXMLDOMNodeList*)&This->IXMLDOMSelection_iface;
 832     hr = S_OK;
 833     TRACE("found %d matches\n", xmlXPathNodeSetGetLength(This->result->nodesetval));
 834
 835 cleanup:
 836     if (FAILED(hr))
 837         IXMLDOMSelection_Release( &This->IXMLDOMSelection_iface );
 838     xmlXPathFreeContext(ctxt);
 839     return hr;
 840 }
 841
 842 #endif