dlls/msxml3/comment.c

   1 /*
   2  *    DOM comment node implementation
   3  *
   4  * Copyright 2006 Huw Davies
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define COBJMACROS
  22
  23 #include "config.h"
  24
  25 #include <stdarg.h>
  26 #ifdef HAVE_LIBXML2
  27 # include <libxml/parser.h>
  28 # include <libxml/xmlerror.h>
  29 #endif
  30
  31 #include "windef.h"
  32 #include "winbase.h"
  33 #include "winuser.h"
  34 #include "ole2.h"
  35 #include "msxml6.h"
  36
  37 #include "msxml_private.h"
  38
  39 #include "wine/debug.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(msxml);
  42
  43 #ifdef HAVE_LIBXML2
  44
  45 typedef struct _domcomment
  46 {
  47     xmlnode node;
  48     IXMLDOMComment IXMLDOMComment_iface;
  49     LONG ref;
  50 } domcomment;
  51
  52 static inline domcomment *impl_from_IXMLDOMComment( IXMLDOMComment *iface )
  53 {
  54     return CONTAINING_RECORD(iface, domcomment, IXMLDOMComment_iface);
  55 }
  56
  57 static HRESULT WINAPI domcomment_QueryInterface(
  58     IXMLDOMComment *iface,
  59     REFIID riid,
  60     void** ppvObject )
  61 {
  62     domcomment *This = impl_from_IXMLDOMComment( iface );
  63     TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppvObject);
  64
  65     if ( IsEqualGUID( riid, &IID_IXMLDOMComment ) ||
  66          IsEqualGUID( riid, &IID_IXMLDOMCharacterData) ||
  67          IsEqualGUID( riid, &IID_IXMLDOMNode ) ||
  68          IsEqualGUID( riid, &IID_IDispatch ) ||
  69          IsEqualGUID( riid, &IID_IUnknown ) )
  70     {
  71         *ppvObject = iface;
  72     }
  73     else if(node_query_interface(&This->node, riid, ppvObject))
  74     {
  75         return *ppvObject ? S_OK : E_NOINTERFACE;
  76     }
  77     else
  78     {
  79         TRACE("Unsupported interface %s\n", debugstr_guid(riid));
  80         *ppvObject = NULL;
  81         return E_NOINTERFACE;
  82     }
  83
  84     IXMLDOMText_AddRef((IUnknown*)*ppvObject);
  85     return S_OK;
  86 }
  87
  88 static ULONG WINAPI domcomment_AddRef(
  89     IXMLDOMComment *iface )
  90 {
  91     domcomment *This = impl_from_IXMLDOMComment( iface );
  92     ULONG ref = InterlockedIncrement( &This->ref );
  93     TRACE("(%p)->(%d)\n", This, ref);
  94     return ref;
  95 }
  96
  97 static ULONG WINAPI domcomment_Release(
  98     IXMLDOMComment *iface )
  99 {
 100     domcomment *This = impl_from_IXMLDOMComment( iface );
 101     ULONG ref = InterlockedDecrement( &This->ref );
 102
 103     TRACE("(%p)->(%d)\n", This, ref);
 104     if ( ref == 0 )
 105     {
 106         destroy_xmlnode(&This->node);
 107         heap_free( This );
 108     }
 109
 110     return ref;
 111 }
 112
 113 static HRESULT WINAPI domcomment_GetTypeInfoCount(
 114     IXMLDOMComment *iface,
 115     UINT* pctinfo )
 116 {
 117     domcomment *This = impl_from_IXMLDOMComment( iface );
 118
 119     TRACE("(%p)->(%p)\n", This, pctinfo);
 120
 121     *pctinfo = 1;
 122
 123     return S_OK;
 124 }
 125
 126 static HRESULT WINAPI domcomment_GetTypeInfo(
 127     IXMLDOMComment *iface,
 128     UINT iTInfo, LCID lcid,
 129     ITypeInfo** ppTInfo )
 130 {
 131     domcomment *This = impl_from_IXMLDOMComment( iface );
 132     HRESULT hr;
 133
 134     TRACE("(%p)->(%u %u %p)\n", This, iTInfo, lcid, ppTInfo);
 135
 136     hr = get_typeinfo(IXMLDOMComment_tid, ppTInfo);
 137
 138     return hr;
 139 }
 140
 141 static HRESULT WINAPI domcomment_GetIDsOfNames(
 142     IXMLDOMComment *iface,
 143     REFIID riid, LPOLESTR* rgszNames,
 144     UINT cNames, LCID lcid, DISPID* rgDispId )
 145 {
 146     domcomment *This = impl_from_IXMLDOMComment( iface );
 147     ITypeInfo *typeinfo;
 148     HRESULT hr;
 149
 150     TRACE("(%p)->(%s %p %u %u %p)\n", This, debugstr_guid(riid), rgszNames, cNames,
 151           lcid, rgDispId);
 152
 153     if(!rgszNames || cNames == 0 || !rgDispId)
 154         return E_INVALIDARG;
 155
 156     hr = get_typeinfo(IXMLDOMComment_tid, &typeinfo);
 157     if(SUCCEEDED(hr))
 158     {
 159         hr = ITypeInfo_GetIDsOfNames(typeinfo, rgszNames, cNames, rgDispId);
 160         ITypeInfo_Release(typeinfo);
 161     }
 162
 163     return hr;
 164 }
 165
 166 static HRESULT WINAPI domcomment_Invoke(
 167     IXMLDOMComment *iface,
 168     DISPID dispIdMember, REFIID riid, LCID lcid,
 169     WORD wFlags, DISPPARAMS* pDispParams, VARIANT* pVarResult,
 170     EXCEPINFO* pExcepInfo, UINT* puArgErr )
 171 {
 172     domcomment *This = impl_from_IXMLDOMComment( iface );
 173     ITypeInfo *typeinfo;
 174     HRESULT hr;
 175
 176     TRACE("(%p)->(%d %s %d %d %p %p %p %p)\n", This, dispIdMember, debugstr_guid(riid),
 177           lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
 178
 179     hr = get_typeinfo(IXMLDOMComment_tid, &typeinfo);
 180     if(SUCCEEDED(hr))
 181     {
 182         hr = ITypeInfo_Invoke(typeinfo, &This->IXMLDOMComment_iface, dispIdMember, wFlags,
 183                 pDispParams, pVarResult, pExcepInfo, puArgErr);
 184         ITypeInfo_Release(typeinfo);
 185     }
 186
 187     return hr;
 188 }
 189
 190 static HRESULT WINAPI domcomment_get_nodeName(
 191     IXMLDOMComment *iface,
 192     BSTR* p )
 193 {
 194     domcomment *This = impl_from_IXMLDOMComment( iface );
 195
 196     static const WCHAR commentW[] = {'#','c','o','m','m','e','n','t',0};
 197
 198     TRACE("(%p)->(%p)\n", This, p);
 199
 200     return return_bstr(commentW, p);
 201 }
 202
 203 static HRESULT WINAPI domcomment_get_nodeValue(
 204     IXMLDOMComment *iface,
 205     VARIANT* value)
 206 {
 207     domcomment *This = impl_from_IXMLDOMComment( iface );
 208
 209     TRACE("(%p)->(%p)\n", This, value);
 210
 211     return node_get_content(&This->node, value);
 212 }
 213
 214 static HRESULT WINAPI domcomment_put_nodeValue(
 215     IXMLDOMComment *iface,
 216     VARIANT value)
 217 {
 218     domcomment *This = impl_from_IXMLDOMComment( iface );
 219
 220     TRACE("(%p)->(%s)\n", This, debugstr_variant(&value));
 221
 222     return node_put_value(&This->node, &value);
 223 }
 224
 225 static HRESULT WINAPI domcomment_get_nodeType(
 226     IXMLDOMComment *iface,
 227     DOMNodeType* domNodeType )
 228 {
 229     domcomment *This = impl_from_IXMLDOMComment( iface );
 230
 231     TRACE("(%p)->(%p)\n", This, domNodeType);
 232
 233     *domNodeType = NODE_COMMENT;
 234     return S_OK;
 235 }
 236
 237 static HRESULT WINAPI domcomment_get_parentNode(
 238     IXMLDOMComment *iface,
 239     IXMLDOMNode** parent )
 240 {
 241     domcomment *This = impl_from_IXMLDOMComment( iface );
 242
 243     TRACE("(%p)->(%p)\n", This, parent);
 244
 245     return node_get_parent(&This->node, parent);
 246 }
 247
 248 static HRESULT WINAPI domcomment_get_childNodes(
 249     IXMLDOMComment *iface,
 250     IXMLDOMNodeList** outList)
 251 {
 252     domcomment *This = impl_from_IXMLDOMComment( iface );
 253
 254     TRACE("(%p)->(%p)\n", This, outList);
 255
 256     return node_get_child_nodes(&This->node, outList);
 257 }
 258
 259 static HRESULT WINAPI domcomment_get_firstChild(
 260     IXMLDOMComment *iface,
 261     IXMLDOMNode** domNode)
 262 {
 263     domcomment *This = impl_from_IXMLDOMComment( iface );
 264
 265     TRACE("(%p)->(%p)\n", This, domNode);
 266
 267     return return_null_node(domNode);
 268 }
 269
 270 static HRESULT WINAPI domcomment_get_lastChild(
 271     IXMLDOMComment *iface,
 272     IXMLDOMNode** domNode)
 273 {
 274     domcomment *This = impl_from_IXMLDOMComment( iface );
 275
 276     TRACE("(%p)->(%p)\n", This, domNode);
 277
 278     return return_null_node(domNode);
 279 }
 280
 281 static HRESULT WINAPI domcomment_get_previousSibling(
 282     IXMLDOMComment *iface,
 283     IXMLDOMNode** domNode)
 284 {
 285     domcomment *This = impl_from_IXMLDOMComment( iface );
 286
 287     TRACE("(%p)->(%p)\n", This, domNode);
 288
 289     return node_get_previous_sibling(&This->node, domNode);
 290 }
 291
 292 static HRESULT WINAPI domcomment_get_nextSibling(
 293     IXMLDOMComment *iface,
 294     IXMLDOMNode** domNode)
 295 {
 296     domcomment *This = impl_from_IXMLDOMComment( iface );
 297
 298     TRACE("(%p)->(%p)\n", This, domNode);
 299
 300     return node_get_next_sibling(&This->node, domNode);
 301 }
 302
 303 static HRESULT WINAPI domcomment_get_attributes(
 304     IXMLDOMComment *iface,
 305     IXMLDOMNamedNodeMap** attributeMap)
 306 {
 307     domcomment *This = impl_from_IXMLDOMComment( iface );
 308
 309     TRACE("(%p)->(%p)\n", This, attributeMap);
 310
 311     return return_null_ptr((void**)attributeMap);
 312 }
 313
 314 static HRESULT WINAPI domcomment_insertBefore(
 315     IXMLDOMComment *iface,
 316     IXMLDOMNode* newNode, VARIANT refChild,
 317     IXMLDOMNode** outOldNode)
 318 {
 319     domcomment *This = impl_from_IXMLDOMComment( iface );
 320
 321     FIXME("(%p)->(%p %s %p) needs test\n", This, newNode, debugstr_variant(&refChild), outOldNode);
 322
 323     return node_insert_before(&This->node, newNode, &refChild, outOldNode);
 324 }
 325
 326 static HRESULT WINAPI domcomment_replaceChild(
 327     IXMLDOMComment *iface,
 328     IXMLDOMNode* newNode,
 329     IXMLDOMNode* oldNode,
 330     IXMLDOMNode** outOldNode)
 331 {
 332     domcomment *This = impl_from_IXMLDOMComment( iface );
 333
 334     FIXME("(%p)->(%p %p %p) needs tests\n", This, newNode, oldNode, outOldNode);
 335
 336     return node_replace_child(&This->node, newNode, oldNode, outOldNode);
 337 }
 338
 339 static HRESULT WINAPI domcomment_removeChild(
 340     IXMLDOMComment *iface,
 341     IXMLDOMNode *child, IXMLDOMNode **oldChild)
 342 {
 343     domcomment *This = impl_from_IXMLDOMComment( iface );
 344     TRACE("(%p)->(%p %p)\n", This, child, oldChild);
 345     return node_remove_child(&This->node, child, oldChild);
 346 }
 347
 348 static HRESULT WINAPI domcomment_appendChild(
 349     IXMLDOMComment *iface,
 350     IXMLDOMNode *child, IXMLDOMNode **outChild)
 351 {
 352     domcomment *This = impl_from_IXMLDOMComment( iface );
 353     TRACE("(%p)->(%p %p)\n", This, child, outChild);
 354     return node_append_child(&This->node, child, outChild);
 355 }
 356
 357 static HRESULT WINAPI domcomment_hasChildNodes(
 358     IXMLDOMComment *iface,
 359     VARIANT_BOOL *ret)
 360 {
 361     domcomment *This = impl_from_IXMLDOMComment( iface );
 362     TRACE("(%p)->(%p)\n", This, ret);
 363     return node_has_childnodes(&This->node, ret);
 364 }
 365
 366 static HRESULT WINAPI domcomment_get_ownerDocument(
 367     IXMLDOMComment   *iface,
 368     IXMLDOMDocument **doc)
 369 {
 370     domcomment *This = impl_from_IXMLDOMComment( iface );
 371     TRACE("(%p)->(%p)\n", This, doc);
 372     return node_get_owner_doc(&This->node, doc);
 373 }
 374
 375 static HRESULT WINAPI domcomment_cloneNode(
 376     IXMLDOMComment *iface,
 377     VARIANT_BOOL deep, IXMLDOMNode** outNode)
 378 {
 379     domcomment *This = impl_from_IXMLDOMComment( iface );
 380     TRACE("(%p)->(%d %p)\n", This, deep, outNode);
 381     return node_clone( &This->node, deep, outNode );
 382 }
 383
 384 static HRESULT WINAPI domcomment_get_nodeTypeString(
 385     IXMLDOMComment *iface,
 386     BSTR* p)
 387 {
 388     domcomment *This = impl_from_IXMLDOMComment( iface );
 389     static const WCHAR commentW[] = {'c','o','m','m','e','n','t',0};
 390
 391     TRACE("(%p)->(%p)\n", This, p);
 392
 393     return return_bstr(commentW, p);
 394 }
 395
 396 static HRESULT WINAPI domcomment_get_text(
 397     IXMLDOMComment *iface,
 398     BSTR* p)
 399 {
 400     domcomment *This = impl_from_IXMLDOMComment( iface );
 401     TRACE("(%p)->(%p)\n", This, p);
 402     return node_get_text(&This->node, p);
 403 }
 404
 405 static HRESULT WINAPI domcomment_put_text(
 406     IXMLDOMComment *iface,
 407     BSTR p)
 408 {
 409     domcomment *This = impl_from_IXMLDOMComment( iface );
 410     TRACE("(%p)->(%s)\n", This, debugstr_w(p));
 411     return node_put_text( &This->node, p );
 412 }
 413
 414 static HRESULT WINAPI domcomment_get_specified(
 415     IXMLDOMComment *iface,
 416     VARIANT_BOOL* isSpecified)
 417 {
 418     domcomment *This = impl_from_IXMLDOMComment( iface );
 419     FIXME("(%p)->(%p) stub!\n", This, isSpecified);
 420     *isSpecified = VARIANT_TRUE;
 421     return S_OK;
 422 }
 423
 424 static HRESULT WINAPI domcomment_get_definition(
 425     IXMLDOMComment *iface,
 426     IXMLDOMNode** definitionNode)
 427 {
 428     domcomment *This = impl_from_IXMLDOMComment( iface );
 429     FIXME("(%p)->(%p)\n", This, definitionNode);
 430     return E_NOTIMPL;
 431 }
 432
 433 static HRESULT WINAPI domcomment_get_nodeTypedValue(
 434     IXMLDOMComment *iface,
 435     VARIANT* v)
 436 {
 437     domcomment *This = impl_from_IXMLDOMComment( iface );
 438     TRACE("(%p)->(%p)\n", This, v);
 439     return node_get_content(&This->node, v);
 440 }
 441
 442 static HRESULT WINAPI domcomment_put_nodeTypedValue(
 443     IXMLDOMComment *iface,
 444     VARIANT typedValue)
 445 {
 446     domcomment *This = impl_from_IXMLDOMComment( iface );
 447     FIXME("(%p)->(%s)\n", This, debugstr_variant(&typedValue));
 448     return E_NOTIMPL;
 449 }
 450
 451 static HRESULT WINAPI domcomment_get_dataType(
 452     IXMLDOMComment *iface,
 453     VARIANT* typename)
 454 {
 455     domcomment *This = impl_from_IXMLDOMComment( iface );
 456     TRACE("(%p)->(%p)\n", This, typename);
 457     return return_null_var( typename );
 458 }
 459
 460 static HRESULT WINAPI domcomment_put_dataType(
 461     IXMLDOMComment *iface,
 462     BSTR p)
 463 {
 464     domcomment *This = impl_from_IXMLDOMComment( iface );
 465
 466     FIXME("(%p)->(%s)\n", This, debugstr_w(p));
 467
 468     if(!p)
 469         return E_INVALIDARG;
 470
 471     return E_FAIL;
 472 }
 473
 474 static HRESULT WINAPI domcomment_get_xml(
 475     IXMLDOMComment *iface,
 476     BSTR* p)
 477 {
 478     domcomment *This = impl_from_IXMLDOMComment( iface );
 479
 480     TRACE("(%p)->(%p)\n", This, p);
 481
 482     return node_get_xml(&This->node, FALSE, FALSE, p);
 483 }
 484
 485 static HRESULT WINAPI domcomment_transformNode(
 486     IXMLDOMComment *iface,
 487     IXMLDOMNode *node, BSTR *p)
 488 {
 489     domcomment *This = impl_from_IXMLDOMComment( iface );
 490     TRACE("(%p)->(%p %p)\n", This, node, p);
 491     return node_transform_node(&This->node, node, p);
 492 }
 493
 494 static HRESULT WINAPI domcomment_selectNodes(
 495     IXMLDOMComment *iface,
 496     BSTR p, IXMLDOMNodeList** outList)
 497 {
 498     domcomment *This = impl_from_IXMLDOMComment( iface );
 499     TRACE("(%p)->(%s %p)\n", This, debugstr_w(p), outList);
 500     return node_select_nodes(&This->node, p, outList);
 501 }
 502
 503 static HRESULT WINAPI domcomment_selectSingleNode(
 504     IXMLDOMComment *iface,
 505     BSTR p, IXMLDOMNode** outNode)
 506 {
 507     domcomment *This = impl_from_IXMLDOMComment( iface );
 508     TRACE("(%p)->(%s %p)\n", This, debugstr_w(p), outNode);
 509     return node_select_singlenode(&This->node, p, outNode);
 510 }
 511
 512 static HRESULT WINAPI domcomment_get_parsed(
 513     IXMLDOMComment *iface,
 514     VARIANT_BOOL* isParsed)
 515 {
 516     domcomment *This = impl_from_IXMLDOMComment( iface );
 517     FIXME("(%p)->(%p) stub!\n", This, isParsed);
 518     *isParsed = VARIANT_TRUE;
 519     return S_OK;
 520 }
 521
 522 static HRESULT WINAPI domcomment_get_namespaceURI(
 523     IXMLDOMComment *iface,
 524     BSTR* p)
 525 {
 526     domcomment *This = impl_from_IXMLDOMComment( iface );
 527     TRACE("(%p)->(%p)\n", This, p);
 528     return node_get_namespaceURI(&This->node, p);
 529 }
 530
 531 static HRESULT WINAPI domcomment_get_prefix(
 532     IXMLDOMComment *iface,
 533     BSTR* prefix)
 534 {
 535     domcomment *This = impl_from_IXMLDOMComment( iface );
 536     TRACE("(%p)->(%p)\n", This, prefix);
 537     return return_null_bstr( prefix );
 538 }
 539
 540 static HRESULT WINAPI domcomment_get_baseName(
 541     IXMLDOMComment *iface,
 542     BSTR* name)
 543 {
 544     domcomment *This = impl_from_IXMLDOMComment( iface );
 545     TRACE("(%p)->(%p)\n", This, name);
 546     return return_null_bstr( name );
 547 }
 548
 549 static HRESULT WINAPI domcomment_transformNodeToObject(
 550     IXMLDOMComment *iface,
 551     IXMLDOMNode* domNode, VARIANT var1)
 552 {
 553     domcomment *This = impl_from_IXMLDOMComment( iface );
 554     FIXME("(%p)->(%p %s)\n", This, domNode, debugstr_variant(&var1));
 555     return E_NOTIMPL;
 556 }
 557
 558 static HRESULT WINAPI domcomment_get_data(
 559     IXMLDOMComment *iface,
 560     BSTR *p)
 561 {
 562     domcomment *This = impl_from_IXMLDOMComment( iface );
 563     HRESULT hr;
 564     VARIANT vRet;
 565
 566     TRACE("(%p)->(%p)\n", This, p);
 567
 568     if(!p)
 569         return E_INVALIDARG;
 570
 571     hr = IXMLDOMComment_get_nodeValue( iface, &vRet );
 572     if(hr == S_OK)
 573     {
 574         *p = V_BSTR(&vRet);
 575     }
 576
 577     return hr;
 578 }
 579
 580 static HRESULT WINAPI domcomment_put_data(
 581     IXMLDOMComment *iface,
 582     BSTR data)
 583 {
 584     domcomment *This = impl_from_IXMLDOMComment( iface );
 585     VARIANT val;
 586
 587     TRACE("(%p)->(%s)\n", This, debugstr_w(data) );
 588
 589     V_VT(&val) = VT_BSTR;
 590     V_BSTR(&val) = data;
 591     return node_put_value(&This->node, &val);
 592 }
 593
 594 static HRESULT WINAPI domcomment_get_length(
 595     IXMLDOMComment *iface,
 596     LONG *len)
 597 {
 598     domcomment *This = impl_from_IXMLDOMComment( iface );
 599     HRESULT hr;
 600     BSTR data;
 601
 602     TRACE("(%p)->(%p)\n", This, len);
 603
 604     if(!len)
 605         return E_INVALIDARG;
 606
 607     hr = IXMLDOMComment_get_data(iface, &data);
 608     if(hr == S_OK)
 609     {
 610         *len = SysStringLen(data);
 611         SysFreeString(data);
 612     }
 613
 614     return hr;
 615 }
 616
 617 static HRESULT WINAPI domcomment_substringData(
 618     IXMLDOMComment *iface,
 619     LONG offset, LONG count, BSTR *p)
 620 {
 621     domcomment *This = impl_from_IXMLDOMComment( iface );
 622     HRESULT hr;
 623     BSTR data;
 624
 625     TRACE("(%p)->(%d %d %p)\n", This, offset, count, p);
 626
 627     if(!p)
 628         return E_INVALIDARG;
 629
 630     *p = NULL;
 631     if(offset < 0 || count < 0)
 632         return E_INVALIDARG;
 633
 634     if(count == 0)
 635         return S_FALSE;
 636
 637     hr = IXMLDOMComment_get_data(iface, &data);
 638     if(hr == S_OK)
 639     {
 640         LONG len = SysStringLen(data);
 641
 642         if(offset < len)
 643         {
 644             if(offset + count > len)
 645                 *p = SysAllocString(&data[offset]);
 646             else
 647                 *p = SysAllocStringLen(&data[offset], count);
 648         }
 649         else
 650             hr = S_FALSE;
 651
 652         SysFreeString(data);
 653     }
 654
 655     return hr;
 656 }
 657
 658 static HRESULT WINAPI domcomment_appendData(
 659     IXMLDOMComment *iface,
 660     BSTR p)
 661 {
 662     domcomment *This = impl_from_IXMLDOMComment( iface );
 663     HRESULT hr;
 664     BSTR data;
 665     LONG p_len;
 666
 667     TRACE("(%p)->(%s)\n", This, debugstr_w(p));
 668
 669     /* Nothing to do if NULL or an Empty string passed in. */
 670     if((p_len = SysStringLen(p)) == 0) return S_OK;
 671
 672     hr = IXMLDOMComment_get_data(iface, &data);
 673     if(hr == S_OK)
 674     {
 675         LONG len = SysStringLen(data);
 676         BSTR str = SysAllocStringLen(NULL, p_len + len);
 677
 678         memcpy(str, data, len*sizeof(WCHAR));
 679         memcpy(&str[len], p, p_len*sizeof(WCHAR));
 680         str[len+p_len] = 0;
 681
 682         hr = IXMLDOMComment_put_data(iface, str);
 683
 684         SysFreeString(str);
 685         SysFreeString(data);
 686     }
 687
 688     return hr;
 689 }
 690
 691 static HRESULT WINAPI domcomment_insertData(
 692     IXMLDOMComment *iface,
 693     LONG offset, BSTR p)
 694 {
 695     domcomment *This = impl_from_IXMLDOMComment( iface );
 696     HRESULT hr;
 697     BSTR data;
 698     LONG p_len;
 699
 700     TRACE("(%p)->(%d %s)\n", This, offset, debugstr_w(p));
 701
 702     /* If have a NULL or empty string, don't do anything. */
 703     if((p_len = SysStringLen(p)) == 0)
 704         return S_OK;
 705
 706     if(offset < 0)
 707     {
 708         return E_INVALIDARG;
 709     }
 710
 711     hr = IXMLDOMComment_get_data(iface, &data);
 712     if(hr == S_OK)
 713     {
 714         LONG len = SysStringLen(data);
 715         BSTR str;
 716
 717         if(len < offset)
 718         {
 719             SysFreeString(data);
 720             return E_INVALIDARG;
 721         }
 722
 723         str = SysAllocStringLen(NULL, len + p_len);
 724         /* start part, supplied string and end part */
 725         memcpy(str, data, offset*sizeof(WCHAR));
 726         memcpy(&str[offset], p, p_len*sizeof(WCHAR));
 727         memcpy(&str[offset+p_len], &data[offset], (len-offset)*sizeof(WCHAR));
 728         str[len+p_len] = 0;
 729
 730         hr = IXMLDOMComment_put_data(iface, str);
 731
 732         SysFreeString(str);
 733         SysFreeString(data);
 734     }
 735
 736     return hr;
 737 }
 738
 739 static HRESULT WINAPI domcomment_deleteData(
 740     IXMLDOMComment *iface,
 741     LONG offset, LONG count)
 742 {
 743     HRESULT hr;
 744     LONG len = -1;
 745     BSTR str;
 746
 747     TRACE("(%p)->(%d %d)\n", iface, offset, count);
 748
 749     hr = IXMLDOMComment_get_length(iface, &len);
 750     if(hr != S_OK) return hr;
 751
 752     if((offset < 0) || (offset > len) || (count < 0))
 753         return E_INVALIDARG;
 754
 755     if(len == 0) return S_OK;
 756
 757     /* cutting start or end */
 758     if((offset == 0) || ((count + offset) >= len))
 759     {
 760         if(offset == 0)
 761             IXMLDOMComment_substringData(iface, count, len - count, &str);
 762         else
 763             IXMLDOMComment_substringData(iface, 0, offset, &str);
 764         hr = IXMLDOMComment_put_data(iface, str);
 765     }
 766     else
 767     /* cutting from the inside */
 768     {
 769         BSTR str_end;
 770
 771         IXMLDOMComment_substringData(iface, 0, offset, &str);
 772         IXMLDOMComment_substringData(iface, offset + count, len - count, &str_end);
 773
 774         hr = IXMLDOMComment_put_data(iface, str);
 775         if(hr == S_OK)
 776             hr = IXMLDOMComment_appendData(iface, str_end);
 777
 778         SysFreeString(str_end);
 779     }
 780
 781     SysFreeString(str);
 782
 783     return hr;
 784 }
 785
 786 static HRESULT WINAPI domcomment_replaceData(
 787     IXMLDOMComment *iface,
 788     LONG offset, LONG count, BSTR p)
 789 {
 790     domcomment *This = impl_from_IXMLDOMComment( iface );
 791     HRESULT hr;
 792
 793     TRACE("(%p)->(%d %d %s)\n", This, offset, count, debugstr_w(p));
 794
 795     hr = IXMLDOMComment_deleteData(iface, offset, count);
 796
 797     if (hr == S_OK)
 798        hr = IXMLDOMComment_insertData(iface, offset, p);
 799
 800     return hr;
 801 }
 802
 803 static const struct IXMLDOMCommentVtbl domcomment_vtbl =
 804 {
 805     domcomment_QueryInterface,
 806     domcomment_AddRef,
 807     domcomment_Release,
 808     domcomment_GetTypeInfoCount,
 809     domcomment_GetTypeInfo,
 810     domcomment_GetIDsOfNames,
 811     domcomment_Invoke,
 812     domcomment_get_nodeName,
 813     domcomment_get_nodeValue,
 814     domcomment_put_nodeValue,
 815     domcomment_get_nodeType,
 816     domcomment_get_parentNode,
 817     domcomment_get_childNodes,
 818     domcomment_get_firstChild,
 819     domcomment_get_lastChild,
 820     domcomment_get_previousSibling,
 821     domcomment_get_nextSibling,
 822     domcomment_get_attributes,
 823     domcomment_insertBefore,
 824     domcomment_replaceChild,
 825     domcomment_removeChild,
 826     domcomment_appendChild,
 827     domcomment_hasChildNodes,
 828     domcomment_get_ownerDocument,
 829     domcomment_cloneNode,
 830     domcomment_get_nodeTypeString,
 831     domcomment_get_text,
 832     domcomment_put_text,
 833     domcomment_get_specified,
 834     domcomment_get_definition,
 835     domcomment_get_nodeTypedValue,
 836     domcomment_put_nodeTypedValue,
 837     domcomment_get_dataType,
 838     domcomment_put_dataType,
 839     domcomment_get_xml,
 840     domcomment_transformNode,
 841     domcomment_selectNodes,
 842     domcomment_selectSingleNode,
 843     domcomment_get_parsed,
 844     domcomment_get_namespaceURI,
 845     domcomment_get_prefix,
 846     domcomment_get_baseName,
 847     domcomment_transformNodeToObject,
 848     domcomment_get_data,
 849     domcomment_put_data,
 850     domcomment_get_length,
 851     domcomment_substringData,
 852     domcomment_appendData,
 853     domcomment_insertData,
 854     domcomment_deleteData,
 855     domcomment_replaceData
 856 };
 857
 858 IUnknown* create_comment( xmlNodePtr comment )
 859 {
 860     domcomment *This;
 861
 862     This = heap_alloc( sizeof *This );
 863     if ( !This )
 864         return NULL;
 865
 866     This->IXMLDOMComment_iface.lpVtbl = &domcomment_vtbl;
 867     This->ref = 1;
 868
 869     init_xmlnode(&This->node, comment, (IXMLDOMNode*)&This->IXMLDOMComment_iface, NULL);
 870
 871     return (IUnknown*)&This->IXMLDOMComment_iface;
 872 }
 873
 874 #endif