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 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winuser.h"
  29 #include "ole2.h"
  30 #include "msxml2.h"
  31
  32 #include "msxml_private.h"
  33
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(msxml);
  37
  38 #ifdef HAVE_LIBXML2
  39
  40 typedef struct _domcomment
  41 {
  42     xmlnode node;
  43     const struct IXMLDOMCommentVtbl *lpVtbl;
  44     LONG ref;
  45 } domcomment;
  46
  47 static inline domcomment *impl_from_IXMLDOMComment( IXMLDOMComment *iface )
  48 {
  49     return (domcomment *)((char*)iface - FIELD_OFFSET(domcomment, lpVtbl));
  50 }
  51
  52 static HRESULT WINAPI domcomment_QueryInterface(
  53     IXMLDOMComment *iface,
  54     REFIID riid,
  55     void** ppvObject )
  56 {
  57     domcomment *This = impl_from_IXMLDOMComment( iface );
  58     TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppvObject);
  59
  60     if ( IsEqualGUID( riid, &IID_IXMLDOMComment ) ||
  61          IsEqualGUID( riid, &IID_IXMLDOMCharacterData) ||
  62          IsEqualGUID( riid, &IID_IDispatch ) ||
  63          IsEqualGUID( riid, &IID_IUnknown ) )
  64     {
  65         *ppvObject = iface;
  66     }
  67     else if ( IsEqualGUID( riid, &IID_IXMLDOMNode ) )
  68     {
  69         *ppvObject = IXMLDOMNode_from_impl(&This->node);
  70     }
  71     else
  72     {
  73         FIXME("Unsupported interface %s\n", debugstr_guid(riid));
  74         return E_NOINTERFACE;
  75     }
  76
  77     IXMLDOMText_AddRef((IUnknown*)*ppvObject);
  78     return S_OK;
  79 }
  80
  81 static ULONG WINAPI domcomment_AddRef(
  82     IXMLDOMComment *iface )
  83 {
  84     domcomment *This = impl_from_IXMLDOMComment( iface );
  85     return InterlockedIncrement( &This->ref );
  86 }
  87
  88 static ULONG WINAPI domcomment_Release(
  89     IXMLDOMComment *iface )
  90 {
  91     domcomment *This = impl_from_IXMLDOMComment( iface );
  92     ULONG ref;
  93
  94     ref = InterlockedDecrement( &This->ref );
  95     if ( ref == 0 )
  96     {
  97         destroy_xmlnode(&This->node);
  98         heap_free( This );
  99     }
 100
 101     return ref;
 102 }
 103
 104 static HRESULT WINAPI domcomment_GetTypeInfoCount(
 105     IXMLDOMComment *iface,
 106     UINT* pctinfo )
 107 {
 108     domcomment *This = impl_from_IXMLDOMComment( iface );
 109
 110     TRACE("(%p)->(%p)\n", This, pctinfo);
 111
 112     *pctinfo = 1;
 113
 114     return S_OK;
 115 }
 116
 117 static HRESULT WINAPI domcomment_GetTypeInfo(
 118     IXMLDOMComment *iface,
 119     UINT iTInfo, LCID lcid,
 120     ITypeInfo** ppTInfo )
 121 {
 122     domcomment *This = impl_from_IXMLDOMComment( iface );
 123     HRESULT hr;
 124
 125     TRACE("(%p)->(%u %u %p)\n", This, iTInfo, lcid, ppTInfo);
 126
 127     hr = get_typeinfo(IXMLDOMComment_tid, ppTInfo);
 128
 129     return hr;
 130 }
 131
 132 static HRESULT WINAPI domcomment_GetIDsOfNames(
 133     IXMLDOMComment *iface,
 134     REFIID riid, LPOLESTR* rgszNames,
 135     UINT cNames, LCID lcid, DISPID* rgDispId )
 136 {
 137     domcomment *This = impl_from_IXMLDOMComment( iface );
 138     ITypeInfo *typeinfo;
 139     HRESULT hr;
 140
 141     TRACE("(%p)->(%s %p %u %u %p)\n", This, debugstr_guid(riid), rgszNames, cNames,
 142           lcid, rgDispId);
 143
 144     if(!rgszNames || cNames == 0 || !rgDispId)
 145         return E_INVALIDARG;
 146
 147     hr = get_typeinfo(IXMLDOMComment_tid, &typeinfo);
 148     if(SUCCEEDED(hr))
 149     {
 150         hr = ITypeInfo_GetIDsOfNames(typeinfo, rgszNames, cNames, rgDispId);
 151         ITypeInfo_Release(typeinfo);
 152     }
 153
 154     return hr;
 155 }
 156
 157 static HRESULT WINAPI domcomment_Invoke(
 158     IXMLDOMComment *iface,
 159     DISPID dispIdMember, REFIID riid, LCID lcid,
 160     WORD wFlags, DISPPARAMS* pDispParams, VARIANT* pVarResult,
 161     EXCEPINFO* pExcepInfo, UINT* puArgErr )
 162 {
 163     domcomment *This = impl_from_IXMLDOMComment( iface );
 164     ITypeInfo *typeinfo;
 165     HRESULT hr;
 166
 167     TRACE("(%p)->(%d %s %d %d %p %p %p %p)\n", This, dispIdMember, debugstr_guid(riid),
 168           lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
 169
 170     hr = get_typeinfo(IXMLDOMComment_tid, &typeinfo);
 171     if(SUCCEEDED(hr))
 172     {
 173         hr = ITypeInfo_Invoke(typeinfo, &(This->lpVtbl), dispIdMember, wFlags, pDispParams,
 174                 pVarResult, pExcepInfo, puArgErr);
 175         ITypeInfo_Release(typeinfo);
 176     }
 177
 178     return hr;
 179 }
 180
 181 static HRESULT WINAPI domcomment_get_nodeName(
 182     IXMLDOMComment *iface,
 183     BSTR* p )
 184 {
 185     domcomment *This = impl_from_IXMLDOMComment( iface );
 186     return IXMLDOMNode_get_nodeName( IXMLDOMNode_from_impl(&This->node), p );
 187 }
 188
 189 static HRESULT WINAPI domcomment_get_nodeValue(
 190     IXMLDOMComment *iface,
 191     VARIANT* var1 )
 192 {
 193     domcomment *This = impl_from_IXMLDOMComment( iface );
 194     return IXMLDOMNode_get_nodeValue( IXMLDOMNode_from_impl(&This->node), var1 );
 195 }
 196
 197 static HRESULT WINAPI domcomment_put_nodeValue(
 198     IXMLDOMComment *iface,
 199     VARIANT var1 )
 200 {
 201     domcomment *This = impl_from_IXMLDOMComment( iface );
 202     return IXMLDOMNode_put_nodeValue( IXMLDOMNode_from_impl(&This->node), var1 );
 203 }
 204
 205 static HRESULT WINAPI domcomment_get_nodeType(
 206     IXMLDOMComment *iface,
 207     DOMNodeType* domNodeType )
 208 {
 209     domcomment *This = impl_from_IXMLDOMComment( iface );
 210     return IXMLDOMNode_get_nodeType( IXMLDOMNode_from_impl(&This->node), domNodeType );
 211 }
 212
 213 static HRESULT WINAPI domcomment_get_parentNode(
 214     IXMLDOMComment *iface,
 215     IXMLDOMNode** parent )
 216 {
 217     domcomment *This = impl_from_IXMLDOMComment( iface );
 218     return IXMLDOMNode_get_parentNode( IXMLDOMNode_from_impl(&This->node), parent );
 219 }
 220
 221 static HRESULT WINAPI domcomment_get_childNodes(
 222     IXMLDOMComment *iface,
 223     IXMLDOMNodeList** outList)
 224 {
 225     domcomment *This = impl_from_IXMLDOMComment( iface );
 226     return IXMLDOMNode_get_childNodes( IXMLDOMNode_from_impl(&This->node), outList );
 227 }
 228
 229 static HRESULT WINAPI domcomment_get_firstChild(
 230     IXMLDOMComment *iface,
 231     IXMLDOMNode** domNode)
 232 {
 233     domcomment *This = impl_from_IXMLDOMComment( iface );
 234     return IXMLDOMNode_get_firstChild( IXMLDOMNode_from_impl(&This->node), domNode );
 235 }
 236
 237 static HRESULT WINAPI domcomment_get_lastChild(
 238     IXMLDOMComment *iface,
 239     IXMLDOMNode** domNode)
 240 {
 241     domcomment *This = impl_from_IXMLDOMComment( iface );
 242     return IXMLDOMNode_get_lastChild( IXMLDOMNode_from_impl(&This->node), domNode );
 243 }
 244
 245 static HRESULT WINAPI domcomment_get_previousSibling(
 246     IXMLDOMComment *iface,
 247     IXMLDOMNode** domNode)
 248 {
 249     domcomment *This = impl_from_IXMLDOMComment( iface );
 250     return IXMLDOMNode_get_previousSibling( IXMLDOMNode_from_impl(&This->node), domNode );
 251 }
 252
 253 static HRESULT WINAPI domcomment_get_nextSibling(
 254     IXMLDOMComment *iface,
 255     IXMLDOMNode** domNode)
 256 {
 257     domcomment *This = impl_from_IXMLDOMComment( iface );
 258     return IXMLDOMNode_get_nextSibling( IXMLDOMNode_from_impl(&This->node), domNode );
 259 }
 260
 261 static HRESULT WINAPI domcomment_get_attributes(
 262     IXMLDOMComment *iface,
 263     IXMLDOMNamedNodeMap** attributeMap)
 264 {
 265     domcomment *This = impl_from_IXMLDOMComment( iface );
 266     return IXMLDOMNode_get_attributes( IXMLDOMNode_from_impl(&This->node), attributeMap );
 267 }
 268
 269 static HRESULT WINAPI domcomment_insertBefore(
 270     IXMLDOMComment *iface,
 271     IXMLDOMNode* newNode, VARIANT var1,
 272     IXMLDOMNode** outOldNode)
 273 {
 274     domcomment *This = impl_from_IXMLDOMComment( iface );
 275     return IXMLDOMNode_insertBefore( IXMLDOMNode_from_impl(&This->node), newNode, var1, outOldNode );
 276 }
 277
 278 static HRESULT WINAPI domcomment_replaceChild(
 279     IXMLDOMComment *iface,
 280     IXMLDOMNode* newNode,
 281     IXMLDOMNode* oldNode,
 282     IXMLDOMNode** outOldNode)
 283 {
 284     domcomment *This = impl_from_IXMLDOMComment( iface );
 285     return IXMLDOMNode_replaceChild( IXMLDOMNode_from_impl(&This->node), newNode, oldNode, outOldNode );
 286 }
 287
 288 static HRESULT WINAPI domcomment_removeChild(
 289     IXMLDOMComment *iface,
 290     IXMLDOMNode* domNode, IXMLDOMNode** oldNode)
 291 {
 292     domcomment *This = impl_from_IXMLDOMComment( iface );
 293     return IXMLDOMNode_removeChild( IXMLDOMNode_from_impl(&This->node), domNode, oldNode );
 294 }
 295
 296 static HRESULT WINAPI domcomment_appendChild(
 297     IXMLDOMComment *iface,
 298     IXMLDOMNode* newNode, IXMLDOMNode** outNewNode)
 299 {
 300     domcomment *This = impl_from_IXMLDOMComment( iface );
 301     return IXMLDOMNode_appendChild( IXMLDOMNode_from_impl(&This->node), newNode, outNewNode );
 302 }
 303
 304 static HRESULT WINAPI domcomment_hasChildNodes(
 305     IXMLDOMComment *iface,
 306     VARIANT_BOOL* pbool)
 307 {
 308     domcomment *This = impl_from_IXMLDOMComment( iface );
 309     return IXMLDOMNode_hasChildNodes( IXMLDOMNode_from_impl(&This->node), pbool );
 310 }
 311
 312 static HRESULT WINAPI domcomment_get_ownerDocument(
 313     IXMLDOMComment *iface,
 314     IXMLDOMDocument** domDocument)
 315 {
 316     domcomment *This = impl_from_IXMLDOMComment( iface );
 317     return IXMLDOMNode_get_ownerDocument( IXMLDOMNode_from_impl(&This->node), domDocument );
 318 }
 319
 320 static HRESULT WINAPI domcomment_cloneNode(
 321     IXMLDOMComment *iface,
 322     VARIANT_BOOL pbool, IXMLDOMNode** outNode)
 323 {
 324     domcomment *This = impl_from_IXMLDOMComment( iface );
 325     return IXMLDOMNode_cloneNode( IXMLDOMNode_from_impl(&This->node), pbool, outNode );
 326 }
 327
 328 static HRESULT WINAPI domcomment_get_nodeTypeString(
 329     IXMLDOMComment *iface,
 330     BSTR* p)
 331 {
 332     domcomment *This = impl_from_IXMLDOMComment( iface );
 333     return IXMLDOMNode_get_nodeTypeString( IXMLDOMNode_from_impl(&This->node), p );
 334 }
 335
 336 static HRESULT WINAPI domcomment_get_text(
 337     IXMLDOMComment *iface,
 338     BSTR* p)
 339 {
 340     domcomment *This = impl_from_IXMLDOMComment( iface );
 341     return IXMLDOMNode_get_text( IXMLDOMNode_from_impl(&This->node), p );
 342 }
 343
 344 static HRESULT WINAPI domcomment_put_text(
 345     IXMLDOMComment *iface,
 346     BSTR p)
 347 {
 348     domcomment *This = impl_from_IXMLDOMComment( iface );
 349     return IXMLDOMNode_put_text( IXMLDOMNode_from_impl(&This->node), p );
 350 }
 351
 352 static HRESULT WINAPI domcomment_get_specified(
 353     IXMLDOMComment *iface,
 354     VARIANT_BOOL* pbool)
 355 {
 356     domcomment *This = impl_from_IXMLDOMComment( iface );
 357     return IXMLDOMNode_get_specified( IXMLDOMNode_from_impl(&This->node), pbool );
 358 }
 359
 360 static HRESULT WINAPI domcomment_get_definition(
 361     IXMLDOMComment *iface,
 362     IXMLDOMNode** domNode)
 363 {
 364     domcomment *This = impl_from_IXMLDOMComment( iface );
 365     return IXMLDOMNode_get_definition( IXMLDOMNode_from_impl(&This->node), domNode );
 366 }
 367
 368 static HRESULT WINAPI domcomment_get_nodeTypedValue(
 369     IXMLDOMComment *iface,
 370     VARIANT* var1)
 371 {
 372     domcomment *This = impl_from_IXMLDOMComment( iface );
 373     return IXMLDOMNode_get_nodeTypedValue( IXMLDOMNode_from_impl(&This->node), var1 );
 374 }
 375
 376 static HRESULT WINAPI domcomment_put_nodeTypedValue(
 377     IXMLDOMComment *iface,
 378     VARIANT var1)
 379 {
 380     domcomment *This = impl_from_IXMLDOMComment( iface );
 381     return IXMLDOMNode_put_nodeTypedValue( IXMLDOMNode_from_impl(&This->node), var1 );
 382 }
 383
 384 static HRESULT WINAPI domcomment_get_dataType(
 385     IXMLDOMComment *iface,
 386     VARIANT* var1)
 387 {
 388     domcomment *This = impl_from_IXMLDOMComment( iface );
 389     return IXMLDOMNode_get_dataType( IXMLDOMNode_from_impl(&This->node), var1 );
 390 }
 391
 392 static HRESULT WINAPI domcomment_put_dataType(
 393     IXMLDOMComment *iface,
 394     BSTR p)
 395 {
 396     domcomment *This = impl_from_IXMLDOMComment( iface );
 397     return IXMLDOMNode_put_dataType( IXMLDOMNode_from_impl(&This->node), p );
 398 }
 399
 400 static HRESULT WINAPI domcomment_get_xml(
 401     IXMLDOMComment *iface,
 402     BSTR* p)
 403 {
 404     domcomment *This = impl_from_IXMLDOMComment( iface );
 405     return IXMLDOMNode_get_xml( IXMLDOMNode_from_impl(&This->node), p );
 406 }
 407
 408 static HRESULT WINAPI domcomment_transformNode(
 409     IXMLDOMComment *iface,
 410     IXMLDOMNode* domNode, BSTR* p)
 411 {
 412     domcomment *This = impl_from_IXMLDOMComment( iface );
 413     return IXMLDOMNode_transformNode( IXMLDOMNode_from_impl(&This->node), domNode, p );
 414 }
 415
 416 static HRESULT WINAPI domcomment_selectNodes(
 417     IXMLDOMComment *iface,
 418     BSTR p, IXMLDOMNodeList** outList)
 419 {
 420     domcomment *This = impl_from_IXMLDOMComment( iface );
 421     return IXMLDOMNode_selectNodes( IXMLDOMNode_from_impl(&This->node), p, outList );
 422 }
 423
 424 static HRESULT WINAPI domcomment_selectSingleNode(
 425     IXMLDOMComment *iface,
 426     BSTR p, IXMLDOMNode** outNode)
 427 {
 428     domcomment *This = impl_from_IXMLDOMComment( iface );
 429     return IXMLDOMNode_selectSingleNode( IXMLDOMNode_from_impl(&This->node), p, outNode );
 430 }
 431
 432 static HRESULT WINAPI domcomment_get_parsed(
 433     IXMLDOMComment *iface,
 434     VARIANT_BOOL* pbool)
 435 {
 436     domcomment *This = impl_from_IXMLDOMComment( iface );
 437     return IXMLDOMNode_get_parsed( IXMLDOMNode_from_impl(&This->node), pbool );
 438 }
 439
 440 static HRESULT WINAPI domcomment_get_namespaceURI(
 441     IXMLDOMComment *iface,
 442     BSTR* p)
 443 {
 444     domcomment *This = impl_from_IXMLDOMComment( iface );
 445     return IXMLDOMNode_get_namespaceURI( IXMLDOMNode_from_impl(&This->node), p );
 446 }
 447
 448 static HRESULT WINAPI domcomment_get_prefix(
 449     IXMLDOMComment *iface,
 450     BSTR* p)
 451 {
 452     domcomment *This = impl_from_IXMLDOMComment( iface );
 453     return IXMLDOMNode_get_prefix( IXMLDOMNode_from_impl(&This->node), p );
 454 }
 455
 456 static HRESULT WINAPI domcomment_get_baseName(
 457     IXMLDOMComment *iface,
 458     BSTR* p)
 459 {
 460     domcomment *This = impl_from_IXMLDOMComment( iface );
 461     return IXMLDOMNode_get_baseName( IXMLDOMNode_from_impl(&This->node), p );
 462 }
 463
 464 static HRESULT WINAPI domcomment_transformNodeToObject(
 465     IXMLDOMComment *iface,
 466     IXMLDOMNode* domNode, VARIANT var1)
 467 {
 468     domcomment *This = impl_from_IXMLDOMComment( iface );
 469     return IXMLDOMNode_transformNodeToObject( IXMLDOMNode_from_impl(&This->node), domNode, var1 );
 470 }
 471
 472 static HRESULT WINAPI domcomment_get_data(
 473     IXMLDOMComment *iface,
 474     BSTR *p)
 475 {
 476     domcomment *This = impl_from_IXMLDOMComment( iface );
 477     HRESULT hr;
 478     VARIANT vRet;
 479
 480     TRACE("(%p)->(%p)\n", This, p);
 481
 482     if(!p)
 483         return E_INVALIDARG;
 484
 485     hr = IXMLDOMNode_get_nodeValue( IXMLDOMNode_from_impl(&This->node), &vRet );
 486     if(hr == S_OK)
 487     {
 488         *p = V_BSTR(&vRet);
 489     }
 490
 491     return hr;
 492 }
 493
 494 static HRESULT WINAPI domcomment_put_data(
 495     IXMLDOMComment *iface,
 496     BSTR data)
 497 {
 498     domcomment *This = impl_from_IXMLDOMComment( iface );
 499     VARIANT val;
 500
 501     TRACE("(%p)->(%s)\n", This, debugstr_w(data) );
 502
 503     V_VT(&val) = VT_BSTR;
 504     V_BSTR(&val) = data;
 505
 506     return IXMLDOMNode_put_nodeValue( IXMLDOMNode_from_impl(&This->node), val );
 507 }
 508
 509 static HRESULT WINAPI domcomment_get_length(
 510     IXMLDOMComment *iface,
 511     LONG *len)
 512 {
 513     domcomment *This = impl_from_IXMLDOMComment( iface );
 514     HRESULT hr;
 515     BSTR data;
 516
 517     TRACE("(%p)->(%p)\n", This, len);
 518
 519     if(!len)
 520         return E_INVALIDARG;
 521
 522     hr = IXMLDOMComment_get_data(iface, &data);
 523     if(hr == S_OK)
 524     {
 525         *len = SysStringLen(data);
 526         SysFreeString(data);
 527     }
 528
 529     return hr;
 530 }
 531
 532 static HRESULT WINAPI domcomment_substringData(
 533     IXMLDOMComment *iface,
 534     LONG offset, LONG count, BSTR *p)
 535 {
 536     domcomment *This = impl_from_IXMLDOMComment( iface );
 537     HRESULT hr;
 538     BSTR data;
 539
 540     TRACE("(%p)->(%d %d %p)\n", This, offset, count, p);
 541
 542     if(!p)
 543         return E_INVALIDARG;
 544
 545     *p = NULL;
 546     if(offset < 0 || count < 0)
 547         return E_INVALIDARG;
 548
 549     if(count == 0)
 550         return S_FALSE;
 551
 552     hr = IXMLDOMComment_get_data(iface, &data);
 553     if(hr == S_OK)
 554     {
 555         LONG len = SysStringLen(data);
 556
 557         if(offset < len)
 558         {
 559             if(offset + count > len)
 560                 *p = SysAllocString(&data[offset]);
 561             else
 562                 *p = SysAllocStringLen(&data[offset], count);
 563         }
 564         else
 565             hr = S_FALSE;
 566
 567         SysFreeString(data);
 568     }
 569
 570     return hr;
 571 }
 572
 573 static HRESULT WINAPI domcomment_appendData(
 574     IXMLDOMComment *iface,
 575     BSTR p)
 576 {
 577     domcomment *This = impl_from_IXMLDOMComment( iface );
 578     HRESULT hr;
 579     BSTR data;
 580     LONG p_len;
 581
 582     TRACE("(%p)->(%s)\n", This, debugstr_w(p));
 583
 584     /* Nothing to do if NULL or an Empty string passed in. */
 585     if((p_len = SysStringLen(p)) == 0) return S_OK;
 586
 587     hr = IXMLDOMComment_get_data(iface, &data);
 588     if(hr == S_OK)
 589     {
 590         LONG len = SysStringLen(data);
 591         BSTR str = SysAllocStringLen(NULL, p_len + len);
 592
 593         memcpy(str, data, len*sizeof(WCHAR));
 594         memcpy(&str[len], p, p_len*sizeof(WCHAR));
 595         str[len+p_len] = 0;
 596
 597         hr = IXMLDOMComment_put_data(iface, str);
 598
 599         SysFreeString(str);
 600         SysFreeString(data);
 601     }
 602
 603     return hr;
 604 }
 605
 606 static HRESULT WINAPI domcomment_insertData(
 607     IXMLDOMComment *iface,
 608     LONG offset, BSTR p)
 609 {
 610     domcomment *This = impl_from_IXMLDOMComment( iface );
 611     HRESULT hr;
 612     BSTR data;
 613     LONG p_len;
 614
 615     TRACE("(%p)->(%d %s)\n", This, offset, debugstr_w(p));
 616
 617     /* If have a NULL or empty string, don't do anything. */
 618     if((p_len = SysStringLen(p)) == 0)
 619         return S_OK;
 620
 621     if(offset < 0)
 622     {
 623         return E_INVALIDARG;
 624     }
 625
 626     hr = IXMLDOMComment_get_data(iface, &data);
 627     if(hr == S_OK)
 628     {
 629         LONG len = SysStringLen(data);
 630         BSTR str;
 631
 632         if(len < offset)
 633         {
 634             SysFreeString(data);
 635             return E_INVALIDARG;
 636         }
 637
 638         str = SysAllocStringLen(NULL, len + p_len);
 639         /* start part, supplied string and end part */
 640         memcpy(str, data, offset*sizeof(WCHAR));
 641         memcpy(&str[offset], p, p_len*sizeof(WCHAR));
 642         memcpy(&str[offset+p_len], &data[offset], (len-offset)*sizeof(WCHAR));
 643         str[len+p_len] = 0;
 644
 645         hr = IXMLDOMComment_put_data(iface, str);
 646
 647         SysFreeString(str);
 648         SysFreeString(data);
 649     }
 650
 651     return hr;
 652 }
 653
 654 static HRESULT WINAPI domcomment_deleteData(
 655     IXMLDOMComment *iface,
 656     LONG offset, LONG count)
 657 {
 658     HRESULT hr;
 659     LONG len = -1;
 660     BSTR str;
 661
 662     TRACE("(%p)->(%d %d)\n", iface, offset, count);
 663
 664     hr = IXMLDOMComment_get_length(iface, &len);
 665     if(hr != S_OK) return hr;
 666
 667     if((offset < 0) || (offset > len) || (count < 0))
 668         return E_INVALIDARG;
 669
 670     if(len == 0) return S_OK;
 671
 672     /* cutting start or end */
 673     if((offset == 0) || ((count + offset) >= len))
 674     {
 675         if(offset == 0)
 676             IXMLDOMComment_substringData(iface, count, len - count, &str);
 677         else
 678             IXMLDOMComment_substringData(iface, 0, offset, &str);
 679         hr = IXMLDOMComment_put_data(iface, str);
 680     }
 681     else
 682     /* cutting from the inside */
 683     {
 684         BSTR str_end;
 685
 686         IXMLDOMComment_substringData(iface, 0, offset, &str);
 687         IXMLDOMComment_substringData(iface, offset + count, len - count, &str_end);
 688
 689         hr = IXMLDOMComment_put_data(iface, str);
 690         if(hr == S_OK)
 691             hr = IXMLDOMComment_appendData(iface, str_end);
 692
 693         SysFreeString(str_end);
 694     }
 695
 696     SysFreeString(str);
 697
 698     return hr;
 699 }
 700
 701 static HRESULT WINAPI domcomment_replaceData(
 702     IXMLDOMComment *iface,
 703     LONG offset, LONG count, BSTR p)
 704 {
 705     domcomment *This = impl_from_IXMLDOMComment( iface );
 706     HRESULT hr;
 707
 708     TRACE("(%p)->(%d %d %s)\n", This, offset, count, debugstr_w(p));
 709
 710     hr = IXMLDOMComment_deleteData(iface, offset, count);
 711
 712     if (hr == S_OK)
 713        hr = IXMLDOMComment_insertData(iface, offset, p);
 714
 715     return hr;
 716 }
 717
 718 static const struct IXMLDOMCommentVtbl domcomment_vtbl =
 719 {
 720     domcomment_QueryInterface,
 721     domcomment_AddRef,
 722     domcomment_Release,
 723     domcomment_GetTypeInfoCount,
 724     domcomment_GetTypeInfo,
 725     domcomment_GetIDsOfNames,
 726     domcomment_Invoke,
 727     domcomment_get_nodeName,
 728     domcomment_get_nodeValue,
 729     domcomment_put_nodeValue,
 730     domcomment_get_nodeType,
 731     domcomment_get_parentNode,
 732     domcomment_get_childNodes,
 733     domcomment_get_firstChild,
 734     domcomment_get_lastChild,
 735     domcomment_get_previousSibling,
 736     domcomment_get_nextSibling,
 737     domcomment_get_attributes,
 738     domcomment_insertBefore,
 739     domcomment_replaceChild,
 740     domcomment_removeChild,
 741     domcomment_appendChild,
 742     domcomment_hasChildNodes,
 743     domcomment_get_ownerDocument,
 744     domcomment_cloneNode,
 745     domcomment_get_nodeTypeString,
 746     domcomment_get_text,
 747     domcomment_put_text,
 748     domcomment_get_specified,
 749     domcomment_get_definition,
 750     domcomment_get_nodeTypedValue,
 751     domcomment_put_nodeTypedValue,
 752     domcomment_get_dataType,
 753     domcomment_put_dataType,
 754     domcomment_get_xml,
 755     domcomment_transformNode,
 756     domcomment_selectNodes,
 757     domcomment_selectSingleNode,
 758     domcomment_get_parsed,
 759     domcomment_get_namespaceURI,
 760     domcomment_get_prefix,
 761     domcomment_get_baseName,
 762     domcomment_transformNodeToObject,
 763     domcomment_get_data,
 764     domcomment_put_data,
 765     domcomment_get_length,
 766     domcomment_substringData,
 767     domcomment_appendData,
 768     domcomment_insertData,
 769     domcomment_deleteData,
 770     domcomment_replaceData
 771 };
 772
 773 IUnknown* create_comment( xmlNodePtr comment )
 774 {
 775     domcomment *This;
 776
 777     This = heap_alloc( sizeof *This );
 778     if ( !This )
 779         return NULL;
 780
 781     This->lpVtbl = &domcomment_vtbl;
 782     This->ref = 1;
 783
 784     init_xmlnode(&This->node, comment, (IUnknown*)&This->lpVtbl, NULL);
 785
 786     return (IUnknown*) &This->lpVtbl;
 787 }
 788
 789 #endif