src/xml/xml.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        xml.cpp
   3 // Purpose:     wxXmlDocument - XML parser & data holder class
   4 // Author:      Vaclav Slavik
   5 // Created:     2000/03/05
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2000 Vaclav Slavik
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #include "wx/xml/xml.h"
  19
  20 #if wxUSE_XML
  21
  22 #include "wx/wfstream.h"
  23 #include "wx/datstrm.h"
  24 #include "wx/zstream.h"
  25 #include "wx/log.h"
  26 #include "wx/intl.h"
  27 #include "wx/strconv.h"
  28
  29 #include "expat.h" // from Expat
  30
  31 // DLL options compatibility check:
  32 #include "wx/app.h"
  33 WX_CHECK_BUILD_OPTIONS("wxXML")
  34
  35 //-----------------------------------------------------------------------------
  36 //  wxXmlNode
  37 //-----------------------------------------------------------------------------
  38
  39 wxXmlNode::wxXmlNode(wxXmlNode *parent,wxXmlNodeType type,
  40                      const wxString& name, const wxString& content,
  41                      wxXmlProperty *props, wxXmlNode *next)
  42     : m_type(type), m_name(name), m_content(content),
  43       m_properties(props), m_parent(parent),
  44       m_children(NULL), m_next(next)
  45 {
  46     if (m_parent)
  47     {
  48         if (m_parent->m_children)
  49         {
  50             m_next = m_parent->m_children;
  51             m_parent->m_children = this;
  52         }
  53         else
  54             m_parent->m_children = this;
  55     }
  56 }
  57
  58 wxXmlNode::wxXmlNode(wxXmlNodeType type, const wxString& name,
  59                      const wxString& content)
  60     : m_type(type), m_name(name), m_content(content),
  61       m_properties(NULL), m_parent(NULL),
  62       m_children(NULL), m_next(NULL)
  63 {}
  64
  65 wxXmlNode::wxXmlNode(const wxXmlNode& node)
  66 {
  67     m_next = NULL;
  68     m_parent = NULL;
  69     DoCopy(node);
  70 }
  71
  72 wxXmlNode::~wxXmlNode()
  73 {
  74     wxXmlNode *c, *c2;
  75     for (c = m_children; c; c = c2)
  76     {
  77         c2 = c->m_next;
  78         delete c;
  79     }
  80
  81     wxXmlProperty *p, *p2;
  82     for (p = m_properties; p; p = p2)
  83     {
  84         p2 = p->GetNext();
  85         delete p;
  86     }
  87 }
  88
  89 wxXmlNode& wxXmlNode::operator=(const wxXmlNode& node)
  90 {
  91     wxDELETE(m_properties);
  92     wxDELETE(m_children);
  93     DoCopy(node);
  94     return *this;
  95 }
  96
  97 void wxXmlNode::DoCopy(const wxXmlNode& node)
  98 {
  99     m_type = node.m_type;
 100     m_name = node.m_name;
 101     m_content = node.m_content;
 102     m_children = NULL;
 103
 104     wxXmlNode *n = node.m_children;
 105     while (n)
 106     {
 107         AddChild(new wxXmlNode(*n));
 108         n = n->GetNext();
 109     }
 110
 111     m_properties = NULL;
 112     wxXmlProperty *p = node.m_properties;
 113     while (p)
 114     {
 115        AddProperty(p->GetName(), p->GetValue());
 116        p = p->GetNext();
 117     }
 118 }
 119
 120 bool wxXmlNode::HasProp(const wxString& propName) const
 121 {
 122     wxXmlProperty *prop = GetProperties();
 123
 124     while (prop)
 125     {
 126         if (prop->GetName() == propName) return true;
 127         prop = prop->GetNext();
 128     }
 129
 130     return false;
 131 }
 132
 133 bool wxXmlNode::GetPropVal(const wxString& propName, wxString *value) const
 134 {
 135     wxXmlProperty *prop = GetProperties();
 136
 137     while (prop)
 138     {
 139         if (prop->GetName() == propName)
 140         {
 141             *value = prop->GetValue();
 142             return true;
 143         }
 144         prop = prop->GetNext();
 145     }
 146
 147     return false;
 148 }
 149
 150 wxString wxXmlNode::GetPropVal(const wxString& propName, const wxString& defaultVal) const
 151 {
 152     wxString tmp;
 153     if (GetPropVal(propName, &tmp))
 154         return tmp;
 155
 156     return defaultVal;
 157 }
 158
 159 void wxXmlNode::AddChild(wxXmlNode *child)
 160 {
 161     if (m_children == NULL)
 162         m_children = child;
 163     else
 164     {
 165         wxXmlNode *ch = m_children;
 166         while (ch->m_next) ch = ch->m_next;
 167         ch->m_next = child;
 168     }
 169     child->m_next = NULL;
 170     child->m_parent = this;
 171 }
 172
 173 void wxXmlNode::InsertChild(wxXmlNode *child, wxXmlNode *before_node)
 174 {
 175     wxASSERT_MSG(before_node->GetParent() == this, wxT("wxXmlNode::InsertChild - the node has incorrect parent"));
 176
 177     if (m_children == before_node)
 178        m_children = child;
 179     else
 180     {
 181         wxXmlNode *ch = m_children;
 182         while (ch->m_next != before_node) ch = ch->m_next;
 183         ch->m_next = child;
 184     }
 185
 186     child->m_parent = this;
 187     child->m_next = before_node;
 188 }
 189
 190 bool wxXmlNode::RemoveChild(wxXmlNode *child)
 191 {
 192     if (m_children == NULL)
 193         return false;
 194     else if (m_children == child)
 195     {
 196         m_children = child->m_next;
 197         child->m_parent = NULL;
 198         child->m_next = NULL;
 199         return true;
 200     }
 201     else
 202     {
 203         wxXmlNode *ch = m_children;
 204         while (ch->m_next)
 205         {
 206             if (ch->m_next == child)
 207             {
 208                 ch->m_next = child->m_next;
 209                 child->m_parent = NULL;
 210                 child->m_next = NULL;
 211                 return true;
 212             }
 213             ch = ch->m_next;
 214         }
 215         return false;
 216     }
 217 }
 218
 219 void wxXmlNode::AddProperty(const wxString& name, const wxString& value)
 220 {
 221     AddProperty(new wxXmlProperty(name, value, NULL));
 222 }
 223
 224 void wxXmlNode::AddProperty(wxXmlProperty *prop)
 225 {
 226     if (m_properties == NULL)
 227         m_properties = prop;
 228     else
 229     {
 230         wxXmlProperty *p = m_properties;
 231         while (p->GetNext()) p = p->GetNext();
 232         p->SetNext(prop);
 233     }
 234 }
 235
 236 bool wxXmlNode::DeleteProperty(const wxString& name)
 237 {
 238     wxXmlProperty *prop;
 239
 240     if (m_properties == NULL)
 241         return false;
 242
 243     else if (m_properties->GetName() == name)
 244     {
 245         prop = m_properties;
 246         m_properties = prop->GetNext();
 247         prop->SetNext(NULL);
 248         delete prop;
 249         return true;
 250     }
 251
 252     else
 253     {
 254         wxXmlProperty *p = m_properties;
 255         while (p->GetNext())
 256         {
 257             if (p->GetNext()->GetName() == name)
 258             {
 259                 prop = p->GetNext();
 260                 p->SetNext(prop->GetNext());
 261                 prop->SetNext(NULL);
 262                 delete prop;
 263                 return true;
 264             }
 265             p = p->GetNext();
 266         }
 267         return false;
 268     }
 269 }
 270
 271
 272
 273 //-----------------------------------------------------------------------------
 274 //  wxXmlDocument
 275 //-----------------------------------------------------------------------------
 276
 277 wxXmlDocument::wxXmlDocument()
 278     : m_version(wxT("1.0")), m_fileEncoding(wxT("utf-8")), m_root(NULL)
 279 {
 280 #if !wxUSE_UNICODE
 281     m_encoding = wxT("UTF-8");
 282 #endif
 283 }
 284
 285 wxXmlDocument::wxXmlDocument(const wxString& filename, const wxString& encoding)
 286               :wxObject(), m_root(NULL)
 287 {
 288     if ( !Load(filename, encoding) )
 289     {
 290         wxDELETE(m_root);
 291     }
 292 }
 293
 294 wxXmlDocument::wxXmlDocument(wxInputStream& stream, const wxString& encoding)
 295               :wxObject(), m_root(NULL)
 296 {
 297     if ( !Load(stream, encoding) )
 298     {
 299         wxDELETE(m_root);
 300     }
 301 }
 302
 303 wxXmlDocument::wxXmlDocument(const wxXmlDocument& doc)
 304               :wxObject()
 305 {
 306     DoCopy(doc);
 307 }
 308
 309 wxXmlDocument& wxXmlDocument::operator=(const wxXmlDocument& doc)
 310 {
 311     wxDELETE(m_root);
 312     DoCopy(doc);
 313     return *this;
 314 }
 315
 316 void wxXmlDocument::DoCopy(const wxXmlDocument& doc)
 317 {
 318     m_version = doc.m_version;
 319 #if !wxUSE_UNICODE
 320     m_encoding = doc.m_encoding;
 321 #endif
 322     m_fileEncoding = doc.m_fileEncoding;
 323     m_root = new wxXmlNode(*doc.m_root);
 324 }
 325
 326 bool wxXmlDocument::Load(const wxString& filename, const wxString& encoding)
 327 {
 328     wxFileInputStream stream(filename);
 329     return Load(stream, encoding);
 330 }
 331
 332 bool wxXmlDocument::Save(const wxString& filename) const
 333 {
 334     wxFileOutputStream stream(filename);
 335     return Save(stream);
 336 }
 337
 338
 339
 340 //-----------------------------------------------------------------------------
 341 //  wxXmlDocument loading routines
 342 //-----------------------------------------------------------------------------
 343
 344 /*
 345     FIXME:
 346        - process all elements, including CDATA
 347  */
 348
 349 // converts Expat-produced string in UTF-8 into wxString.
 350 inline static wxString CharToString(wxMBConv *conv,
 351                                     const char *s, size_t len = wxSTRING_MAXLEN)
 352 {
 353 #if wxUSE_UNICODE
 354     (void)conv;
 355     return wxString(s, wxConvUTF8, len);
 356 #else
 357     if ( conv )
 358     {
 359         size_t nLen = (len != wxSTRING_MAXLEN) ? len :
 360                           wxConvUTF8.MB2WC((wchar_t*) NULL, s, 0);
 361
 362         wchar_t *buf = new wchar_t[nLen+1];
 363         wxConvUTF8.MB2WC(buf, s, nLen);
 364         buf[nLen] = 0;
 365         wxString str(buf, *conv, len);
 366         delete[] buf;
 367         return str;
 368     }
 369     else
 370         return wxString(s, len != wxSTRING_MAXLEN ? len : strlen(s));
 371 #endif
 372 }
 373
 374 struct wxXmlParsingContext
 375 {
 376     wxMBConv  *conv;
 377     wxXmlNode *root;
 378     wxXmlNode *node;
 379     wxXmlNode *lastAsText;
 380     wxString   encoding;
 381     wxString   version;
 382 };
 383
 384 extern "C" {
 385 static void StartElementHnd(void *userData, const char *name, const char **atts)
 386 {
 387     wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
 388     wxXmlNode *node = new wxXmlNode(wxXML_ELEMENT_NODE, CharToString(ctx->conv, name));
 389     const char **a = atts;
 390     while (*a)
 391     {
 392         node->AddProperty(CharToString(ctx->conv, a[0]), CharToString(ctx->conv, a[1]));
 393         a += 2;
 394     }
 395     if (ctx->root == NULL)
 396         ctx->root = node;
 397     else
 398         ctx->node->AddChild(node);
 399     ctx->node = node;
 400     ctx->lastAsText = NULL;
 401 }
 402 }
 403
 404 extern "C" {
 405 static void EndElementHnd(void *userData, const char* WXUNUSED(name))
 406 {
 407     wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
 408
 409     ctx->node = ctx->node->GetParent();
 410     ctx->lastAsText = NULL;
 411 }
 412 }
 413
 414 extern "C" {
 415 static void TextHnd(void *userData, const char *s, int len)
 416 {
 417     wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
 418     char *buf = new char[len + 1];
 419
 420     buf[len] = '\0';
 421     memcpy(buf, s, (size_t)len);
 422
 423     if (ctx->lastAsText)
 424     {
 425         ctx->lastAsText->SetContent(ctx->lastAsText->GetContent() +
 426                                     CharToString(ctx->conv, buf));
 427     }
 428     else
 429     {
 430         bool whiteOnly = true;
 431         for (char *c = buf; *c != '\0'; c++)
 432             if (*c != ' ' && *c != '\t' && *c != '\n' && *c != '\r')
 433             {
 434                 whiteOnly = false;
 435                 break;
 436             }
 437         if (!whiteOnly)
 438         {
 439             ctx->lastAsText = new wxXmlNode(wxXML_TEXT_NODE, wxT("text"),
 440                                             CharToString(ctx->conv, buf));
 441             ctx->node->AddChild(ctx->lastAsText);
 442         }
 443     }
 444
 445     delete[] buf;
 446 }
 447 }
 448
 449 extern "C" {
 450 static void CommentHnd(void *userData, const char *data)
 451 {
 452     wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
 453
 454     if (ctx->node)
 455     {
 456         // VS: ctx->node == NULL happens if there is a comment before
 457         //     the root element (e.g. wxDesigner's output). We ignore such
 458         //     comments, no big deal...
 459         ctx->node->AddChild(new wxXmlNode(wxXML_COMMENT_NODE,
 460                             wxT("comment"), CharToString(ctx->conv, data)));
 461     }
 462     ctx->lastAsText = NULL;
 463 }
 464 }
 465
 466 extern "C" {
 467 static void DefaultHnd(void *userData, const char *s, int len)
 468 {
 469     // XML header:
 470     if (len > 6 && memcmp(s, "<?xml ", 6) == 0)
 471     {
 472         wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
 473
 474         wxString buf = CharToString(ctx->conv, s, (size_t)len);
 475         int pos;
 476         pos = buf.Find(wxT("encoding="));
 477         if (pos != wxNOT_FOUND)
 478             ctx->encoding = buf.Mid(pos + 10).BeforeFirst(buf[(size_t)pos+9]);
 479         pos = buf.Find(wxT("version="));
 480         if (pos != wxNOT_FOUND)
 481             ctx->version = buf.Mid(pos + 9).BeforeFirst(buf[(size_t)pos+8]);
 482     }
 483 }
 484 }
 485
 486 extern "C" {
 487 static int UnknownEncodingHnd(void * WXUNUSED(encodingHandlerData),
 488                               const XML_Char *name, XML_Encoding *info)
 489 {
 490     // We must build conversion table for expat. The easiest way to do so
 491     // is to let wxCSConv convert as string containing all characters to
 492     // wide character representation:
 493     wxString str(name, wxConvLibc);
 494     wxCSConv conv(str);
 495     char mbBuf[2];
 496     wchar_t wcBuf[10];
 497     size_t i;
 498
 499     mbBuf[1] = 0;
 500     info->map[0] = 0;
 501     for (i = 0; i < 255; i++)
 502     {
 503         mbBuf[0] = (char)(i+1);
 504         if (conv.MB2WC(wcBuf, mbBuf, 2) == (size_t)-1)
 505         {
 506             // invalid/undefined byte in the encoding:
 507             info->map[i+1] = -1;
 508         }
 509         info->map[i+1] = (int)wcBuf[0];
 510     }
 511
 512     info->data = NULL;
 513     info->convert = NULL;
 514     info->release = NULL;
 515
 516     return 1;
 517 }
 518 }
 519
 520 bool wxXmlDocument::Load(wxInputStream& stream, const wxString& encoding)
 521 {
 522 #if wxUSE_UNICODE
 523     (void)encoding;
 524 #else
 525     m_encoding = encoding;
 526 #endif
 527
 528     const size_t BUFSIZE = 1024;
 529     char buf[BUFSIZE];
 530     wxXmlParsingContext ctx;
 531     bool done;
 532     XML_Parser parser = XML_ParserCreate(NULL);
 533
 534     ctx.root = ctx.node = NULL;
 535     ctx.encoding = wxT("UTF-8"); // default in absence of encoding=""
 536     ctx.conv = NULL;
 537 #if !wxUSE_UNICODE
 538     if ( encoding != wxT("UTF-8") && encoding != wxT("utf-8") )
 539         ctx.conv = new wxCSConv(encoding);
 540 #endif
 541
 542     XML_SetUserData(parser, (void*)&ctx);
 543     XML_SetElementHandler(parser, StartElementHnd, EndElementHnd);
 544     XML_SetCharacterDataHandler(parser, TextHnd);
 545     XML_SetCommentHandler(parser, CommentHnd);
 546     XML_SetDefaultHandler(parser, DefaultHnd);
 547     XML_SetUnknownEncodingHandler(parser, UnknownEncodingHnd, NULL);
 548
 549     bool ok = true;
 550     do
 551     {
 552         size_t len = stream.Read(buf, BUFSIZE).LastRead();
 553         done = (len < BUFSIZE);
 554         if (!XML_Parse(parser, buf, len, done))
 555         {
 556             wxString error(XML_ErrorString(XML_GetErrorCode(parser)),
 557                            *wxConvCurrent);
 558             wxLogError(_("XML parsing error: '%s' at line %d"),
 559                        error.c_str(),
 560                        XML_GetCurrentLineNumber(parser));
 561             ok = false;
 562             break;
 563         }
 564     } while (!done);
 565
 566     if (ok)
 567     {
 568         if (!ctx.version.empty())
 569             SetVersion(ctx.version);
 570         if (!ctx.encoding.empty())
 571             SetFileEncoding(ctx.encoding);
 572         SetRoot(ctx.root);
 573     }
 574     else
 575     {
 576         delete ctx.root;
 577     }
 578
 579     XML_ParserFree(parser);
 580 #if !wxUSE_UNICODE
 581     if ( ctx.conv )
 582         delete ctx.conv;
 583 #endif
 584
 585     return ok;
 586
 587 }
 588
 589
 590
 591 //-----------------------------------------------------------------------------
 592 //  wxXmlDocument saving routines
 593 //-----------------------------------------------------------------------------
 594
 595 // write string to output:
 596 inline static void OutputString(wxOutputStream& stream, const wxString& str,
 597 #if wxUSE_UNICODE
 598     wxMBConv * WXUNUSED(convMem),
 599 #else
 600     wxMBConv *convMem,
 601 #endif
 602     wxMBConv *convFile)
 603 {
 604     if (str.empty()) return;
 605 #if wxUSE_UNICODE
 606     const wxWX2MBbuf buf(str.mb_str(*(convFile ? convFile : &wxConvUTF8)));
 607     stream.Write((const char*)buf, strlen((const char*)buf));
 608 #else
 609     if ( convFile == NULL )
 610         stream.Write(str.mb_str(), str.Len());
 611     else
 612     {
 613         wxString str2(str.wc_str(*convMem), *convFile);
 614         stream.Write(str2.mb_str(), str2.Len());
 615     }
 616 #endif
 617 }
 618
 619 // Same as above, but create entities first.
 620 // Translates '<' to "&lt;", '>' to "&gt;" and '&' to "&amp;"
 621 static void OutputStringEnt(wxOutputStream& stream, const wxString& str,
 622                             wxMBConv *convMem, wxMBConv *convFile,
 623                             bool escapeQuotes = false)
 624 {
 625     wxString buf;
 626     size_t i, last, len;
 627     wxChar c;
 628
 629     len = str.Len();
 630     last = 0;
 631     for (i = 0; i < len; i++)
 632     {
 633         c = str.GetChar(i);
 634         if (c == wxT('<') || c == wxT('>') ||
 635             (c == wxT('&') && str.Mid(i+1, 4) != wxT("amp;")) ||
 636             (escapeQuotes && c == wxT('"')))
 637         {
 638             OutputString(stream, str.Mid(last, i - last), convMem, convFile);
 639             switch (c)
 640             {
 641                 case wxT('<'):
 642                     OutputString(stream, wxT("&lt;"), NULL, NULL);
 643                     break;
 644                 case wxT('>'):
 645                     OutputString(stream, wxT("&gt;"), NULL, NULL);
 646                     break;
 647                 case wxT('&'):
 648                     OutputString(stream, wxT("&amp;"), NULL, NULL);
 649                     break;
 650                 case wxT('"'):
 651                     OutputString(stream, wxT("&quot;"), NULL, NULL);
 652                     break;
 653                 default: break;
 654             }
 655             last = i + 1;
 656         }
 657     }
 658     OutputString(stream, str.Mid(last, i - last), convMem, convFile);
 659 }
 660
 661 inline static void OutputIndentation(wxOutputStream& stream, int indent)
 662 {
 663     wxString str = wxT("\n");
 664     for (int i = 0; i < indent; i++)
 665         str << wxT(' ') << wxT(' ');
 666     OutputString(stream, str, NULL, NULL);
 667 }
 668
 669 static void OutputNode(wxOutputStream& stream, wxXmlNode *node, int indent,
 670                        wxMBConv *convMem, wxMBConv *convFile)
 671 {
 672     wxXmlNode *n, *prev;
 673     wxXmlProperty *prop;
 674
 675     switch (node->GetType())
 676     {
 677         case wxXML_TEXT_NODE:
 678             OutputStringEnt(stream, node->GetContent(), convMem, convFile);
 679             break;
 680
 681         case wxXML_ELEMENT_NODE:
 682             OutputString(stream, wxT("<"), NULL, NULL);
 683             OutputString(stream, node->GetName(), NULL, NULL);
 684
 685             prop = node->GetProperties();
 686             while (prop)
 687             {
 688                 OutputString(stream, wxT(" ") + prop->GetName() +  wxT("=\""),
 689                              NULL, NULL);
 690                 OutputStringEnt(stream, prop->GetValue(), NULL, NULL,
 691                                 true/*escapeQuotes*/);
 692                 OutputString(stream, wxT("\""), NULL, NULL);
 693                 prop = prop->GetNext();
 694             }
 695
 696             if (node->GetChildren())
 697             {
 698                 OutputString(stream, wxT(">"), NULL, NULL);
 699                 prev = NULL;
 700                 n = node->GetChildren();
 701                 while (n)
 702                 {
 703                     if (n && n->GetType() != wxXML_TEXT_NODE)
 704                         OutputIndentation(stream, indent + 1);
 705                     OutputNode(stream, n, indent + 1, convMem, convFile);
 706                     prev = n;
 707                     n = n->GetNext();
 708                 }
 709                 if (prev && prev->GetType() != wxXML_TEXT_NODE)
 710                     OutputIndentation(stream, indent);
 711                 OutputString(stream, wxT("</"), NULL, NULL);
 712                 OutputString(stream, node->GetName(), NULL, NULL);
 713                 OutputString(stream, wxT(">"), NULL, NULL);
 714             }
 715             else
 716                 OutputString(stream, wxT("/>"), NULL, NULL);
 717             break;
 718
 719         case wxXML_COMMENT_NODE:
 720             OutputString(stream, wxT("<!--"), NULL, NULL);
 721             OutputString(stream, node->GetContent(), convMem, convFile);
 722             OutputString(stream, wxT("-->"), NULL, NULL);
 723             break;
 724
 725         default:
 726             wxFAIL_MSG(wxT("unsupported node type"));
 727     }
 728 }
 729
 730 bool wxXmlDocument::Save(wxOutputStream& stream) const
 731 {
 732     if ( !IsOk() )
 733         return false;
 734
 735     wxString s;
 736
 737     wxMBConv *convMem = NULL;
 738
 739 #if wxUSE_UNICODE
 740     wxMBConv *convFile = new wxCSConv(GetFileEncoding());
 741 #else
 742     wxMBConv *convFile = NULL;
 743     if ( GetFileEncoding() != GetEncoding() )
 744     {
 745         convFile = new wxCSConv(GetFileEncoding());
 746         convMem = new wxCSConv(GetEncoding());
 747     }
 748 #endif
 749
 750     s.Printf(wxT("<?xml version=\"%s\" encoding=\"%s\"?>\n"),
 751              GetVersion().c_str(), GetFileEncoding().c_str());
 752     OutputString(stream, s, NULL, NULL);
 753
 754     OutputNode(stream, GetRoot(), 0, convMem, convFile);
 755     OutputString(stream, wxT("\n"), NULL, NULL);
 756
 757     if ( convFile )
 758         delete convFile;
 759     if ( convMem )
 760         delete convMem;
 761
 762     return true;
 763 }
 764
 765 #endif // wxUSE_XML