src/msw/ole/automtn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        automtn.cpp
   3 // Purpose:     OLE automation utilities
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     11/6/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998, Julian Smart
   9 // Licence:     wxWindows Licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "automtn.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #if defined(__BORLANDC__)
  20 #pragma hdrstop
  21 #endif
  22
  23 #include "wx/defs.h"
  24
  25 // Watcom C++ gives a linker error if this is compiled in.
  26 // With Borland C++, all samples crash if this is compiled in.
  27 #if wxUSE_OLE &&!defined(__WATCOMC__) && !(defined(__BORLANDC__) && (__BORLANDC__ < 0x520)) && !defined(__CYGWIN10__) && !defined(__WXWINE__)
  28
  29 #include "wx/log.h"
  30 #include "wx/msw/ole/automtn.h"
  31 #include "wx/msw/private.h"
  32
  33 #include <math.h>
  34 #include <time.h>
  35
  36 #include <wtypes.h>
  37 #include <unknwn.h>
  38 #include <ole2.h>
  39 #define _huge
  40 #include <ole2ver.h>
  41 #include <oleauto.h>
  42
  43 // wrapper around BSTR type (by Vadim Zeitlin)
  44
  45 class WXDLLEXPORT BasicString
  46 {
  47 public:
  48   // ctors & dtor
  49   BasicString(const char *sz);
  50  ~BasicString();
  51
  52   // accessors
  53     // just get the string
  54   operator BSTR() const { return m_wzBuf; }
  55     // retrieve a copy of our string - caller must SysFreeString() it later!
  56   BSTR Get() const { return SysAllocString(m_wzBuf); }
  57
  58 private:
  59   // @@@ not implemented (but should be)
  60   BasicString(const BasicString&);
  61   BasicString& operator=(const BasicString&);
  62
  63   OLECHAR *m_wzBuf;     // actual string
  64 };
  65
  66 // Convert variants
  67 static bool ConvertVariantToOle(const wxVariant& variant, VARIANTARG& oleVariant) ;
  68 static bool ConvertOleToVariant(const VARIANTARG& oleVariant, wxVariant& variant) ;
  69
  70 // Convert string to Unicode
  71 static BSTR ConvertStringToOle(const wxString& str);
  72
  73 // Convert string from BSTR to wxString
  74 static wxString ConvertStringFromOle(BSTR bStr);
  75
  76 // Verifies will fail if the needed buffer size is too large
  77 #define MAX_TIME_BUFFER_SIZE    128         // matches that in timecore.cpp
  78 #define MIN_DATE                (-657434L)  // about year 100
  79 #define MAX_DATE                2958465L    // about year 9999
  80
  81 // Half a second, expressed in days
  82 #define HALF_SECOND  (1.0/172800.0)
  83
  84 // One-based array of days in year at month start
  85 static int rgMonthDays[13] =
  86         {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365};
  87
  88 #if wxUSE_TIMEDATE
  89 static BOOL OleDateFromTm(WORD wYear, WORD wMonth, WORD wDay,
  90         WORD wHour, WORD wMinute, WORD wSecond, DATE& dtDest);
  91 static BOOL TmFromOleDate(DATE dtSrc, struct tm& tmDest);
  92 #endif // wxUSE_TIMEDATE
  93
  94 static void ClearVariant(VARIANTARG *pvarg) ;
  95 static void ReleaseVariant(VARIANTARG *pvarg) ;
  96 // static void ShowException(LPOLESTR szMember, HRESULT hr, EXCEPINFO *pexcep, unsigned int uiArgErr);
  97
  98 /*
  99  * wxAutomationObject
 100  */
 101
 102 wxAutomationObject::wxAutomationObject(WXIDISPATCH* dispatchPtr)
 103 {
 104         m_dispatchPtr = dispatchPtr;
 105 }
 106
 107 wxAutomationObject::~wxAutomationObject()
 108 {
 109         if (m_dispatchPtr)
 110         {
 111                 ((IDispatch*)m_dispatchPtr)->Release();
 112                 m_dispatchPtr = NULL;
 113         }
 114 }
 115
 116 #define INVOKEARG(i) (args ? args[i] : *(ptrArgs[i]))
 117
 118 // For Put/Get, no named arguments are allowed.
 119 bool wxAutomationObject::Invoke(const wxString& member, int action,
 120         wxVariant& retValue, int noArgs, wxVariant args[], const wxVariant* ptrArgs[]) const
 121 {
 122         if (!m_dispatchPtr)
 123                 return FALSE;
 124
 125         // nonConstMember is necessary because the wxString class doesn't have enough consts...
 126         wxString nonConstMember(member);
 127
 128         int ch = nonConstMember.Find('.');
 129         if (ch != -1)
 130         {
 131                 // Use dot notation to get the next object
 132                 wxString member2(nonConstMember.Left((size_t) ch));
 133                 wxString rest(nonConstMember.Right(nonConstMember.Length() - ch - 1));
 134                 wxAutomationObject obj;
 135                 if (!GetObject(obj, member2))
 136                         return FALSE;
 137                 return obj.Invoke(rest, action, retValue, noArgs, args, ptrArgs);
 138         }
 139
 140         VARIANTARG vReturn;
 141         ClearVariant(& vReturn);
 142
 143         VARIANTARG* vReturnPtr = & vReturn;
 144
 145         // Find number of names args
 146         int namedArgCount = 0;
 147         int i;
 148         for (i = 0; i < noArgs; i++)
 149                 if (!INVOKEARG(i).GetName().IsNull())
 150                 {
 151                         namedArgCount ++;
 152                 }
 153
 154         int namedArgStringCount = namedArgCount + 1;
 155         BSTR* argNames = new BSTR[namedArgStringCount];
 156         argNames[0] = ConvertStringToOle(member);
 157
 158         // Note that arguments are specified in reverse order
 159         // (all totally logical; hey, we're dealing with OLE here.)
 160
 161         int j = 0;
 162         for (i = 0; i < namedArgCount; i++)
 163         {
 164                 if (!INVOKEARG(i).GetName().IsNull())
 165                 {
 166                         argNames[(namedArgCount-j)] = ConvertStringToOle(INVOKEARG(i).GetName());
 167                         j ++;
 168                 }
 169         }
 170
 171         // + 1 for the member name, + 1 again in case we're a 'put'
 172         DISPID* dispIds = new DISPID[namedArgCount + 2];
 173
 174         HRESULT hr;
 175         DISPPARAMS dispparams;
 176         unsigned int uiArgErr;
 177         EXCEPINFO excep;
 178
 179         // Get the IDs for the member and its arguments.  GetIDsOfNames expects the
 180         // member name as the first name, followed by argument names (if any).
 181         hr = ((IDispatch*)m_dispatchPtr)->GetIDsOfNames(IID_NULL, argNames,
 182                                                                 1 + namedArgCount, LOCALE_SYSTEM_DEFAULT, dispIds);
 183         if (FAILED(hr))
 184         {
 185 //              ShowException(szMember, hr, NULL, 0);
 186                 return FALSE;
 187         }
 188
 189         // if doing a property put(ref), we need to adjust the first argument to have a
 190         // named arg of DISPID_PROPERTYPUT.
 191         if (action & (DISPATCH_PROPERTYPUT | DISPATCH_PROPERTYPUTREF))
 192         {
 193                 namedArgCount = 1;
 194                 dispIds[1] = DISPID_PROPERTYPUT;
 195                 vReturnPtr = (VARIANTARG*) NULL;
 196         }
 197
 198         // Convert the wxVariants to VARIANTARGs
 199         VARIANTARG* oleArgs = new VARIANTARG[noArgs];
 200         for (i = 0; i < noArgs; i++)
 201         {
 202                 // Again, reverse args
 203                 if (!ConvertVariantToOle(INVOKEARG((noArgs-1) - i), oleArgs[i]))
 204                         return FALSE; // TODO: clean up memory at this point
 205         }
 206
 207         dispparams.rgdispidNamedArgs = dispIds + 1;
 208         dispparams.rgvarg = oleArgs;
 209         dispparams.cArgs = noArgs;
 210         dispparams.cNamedArgs = namedArgCount;
 211
 212         excep.pfnDeferredFillIn = NULL;
 213
 214         hr = ((IDispatch*)m_dispatchPtr)->Invoke(dispIds[0], IID_NULL, LOCALE_SYSTEM_DEFAULT,
 215                                                 action, &dispparams, vReturnPtr, &excep, &uiArgErr);
 216
 217         for (i = 0; i < namedArgStringCount; i++)
 218         {
 219                 SysFreeString(argNames[i]);
 220         }
 221         delete[] argNames;
 222         delete[] dispIds;
 223
 224         for (i = 0; i < noArgs; i++)
 225                 ReleaseVariant(& oleArgs[i]) ;
 226         delete[] oleArgs;
 227
 228         if (FAILED(hr))
 229         {
 230                 // display the exception information if appropriate:
 231 //              ShowException((const char*) member, hr, &excep, uiArgErr);
 232
 233                 // free exception structure information
 234                 SysFreeString(excep.bstrSource);
 235                 SysFreeString(excep.bstrDescription);
 236                 SysFreeString(excep.bstrHelpFile);
 237
 238                 if (vReturnPtr)
 239                         ReleaseVariant(vReturnPtr);
 240                 return FALSE;
 241         }
 242         else
 243         {
 244                 if (vReturnPtr)
 245                 {
 246                         // Convert result to wxVariant form
 247                         ConvertOleToVariant(vReturn, retValue);
 248                         // Mustn't release the dispatch pointer
 249                         if (vReturn.vt == VT_DISPATCH)
 250                         {
 251                                 vReturn.pdispVal = (IDispatch*) NULL;
 252                         }
 253                         ReleaseVariant(& vReturn);
 254                 }
 255         }
 256         return TRUE;
 257 }
 258
 259 // Invoke a member function
 260 wxVariant wxAutomationObject::CallMethod(const wxString& member, int noArgs, wxVariant args[])
 261 {
 262         wxVariant retVariant;
 263         if (!Invoke(member, DISPATCH_METHOD, retVariant, noArgs, args))
 264         {
 265                 retVariant.MakeNull();
 266         }
 267         return retVariant;
 268 }
 269
 270 wxVariant wxAutomationObject::CallMethodArray(const wxString& member, int noArgs, const wxVariant **args)
 271 {
 272         wxVariant retVariant;
 273         if (!Invoke(member, DISPATCH_METHOD, retVariant, noArgs, NULL, args))
 274         {
 275                 retVariant.MakeNull();
 276         }
 277         return retVariant;
 278 }
 279
 280 wxVariant wxAutomationObject::CallMethod(const wxString& member,
 281                 const wxVariant& arg1, const wxVariant& arg2,
 282                 const wxVariant& arg3, const wxVariant& arg4,
 283                 const wxVariant& arg5, const wxVariant& arg6)
 284 {
 285         const wxVariant** args = new const wxVariant*[6];
 286         int i = 0;
 287         if (!arg1.IsNull())
 288         {
 289                 args[i] = & arg1;
 290                 i ++;
 291         }
 292         if (!arg2.IsNull())
 293         {
 294                 args[i] = & arg2;
 295                 i ++;
 296         }
 297         if (!arg3.IsNull())
 298         {
 299                 args[i] = & arg3;
 300                 i ++;
 301         }
 302         if (!arg4.IsNull())
 303         {
 304                 args[i] = & arg4;
 305                 i ++;
 306         }
 307         if (!arg5.IsNull())
 308         {
 309                 args[i] = & arg5;
 310                 i ++;
 311         }
 312         if (!arg6.IsNull())
 313         {
 314                 args[i] = & arg6;
 315                 i ++;
 316         }
 317         wxVariant retVariant;
 318         if (!Invoke(member, DISPATCH_METHOD, retVariant, i, NULL, args))
 319         {
 320                 retVariant.MakeNull();
 321         }
 322         delete[] args;
 323         return retVariant;
 324 }
 325
 326 // Get/Set property
 327 wxVariant wxAutomationObject::GetPropertyArray(const wxString& property, int noArgs, const wxVariant **args) const
 328 {
 329         wxVariant retVariant;
 330         if (!Invoke(property, DISPATCH_PROPERTYGET, retVariant, noArgs, NULL, args))
 331         {
 332                 retVariant.MakeNull();
 333         }
 334         return retVariant;
 335 }
 336 wxVariant wxAutomationObject::GetProperty(const wxString& property, int noArgs, wxVariant args[]) const
 337 {
 338         wxVariant retVariant;
 339         if (!Invoke(property, DISPATCH_PROPERTYGET, retVariant, noArgs, args))
 340         {
 341                 retVariant.MakeNull();
 342         }
 343         return retVariant;
 344 }
 345
 346 wxVariant wxAutomationObject::GetProperty(const wxString& property,
 347                 const wxVariant& arg1, const wxVariant& arg2,
 348                 const wxVariant& arg3, const wxVariant& arg4,
 349                 const wxVariant& arg5, const wxVariant& arg6)
 350 {
 351         const wxVariant** args = new const wxVariant*[6];
 352         int i = 0;
 353         if (!arg1.IsNull())
 354         {
 355                 args[i] = & arg1;
 356                 i ++;
 357         }
 358         if (!arg2.IsNull())
 359         {
 360                 args[i] = & arg2;
 361                 i ++;
 362         }
 363         if (!arg3.IsNull())
 364         {
 365                 args[i] = & arg3;
 366                 i ++;
 367         }
 368         if (!arg4.IsNull())
 369         {
 370                 args[i] = & arg4;
 371                 i ++;
 372         }
 373         if (!arg5.IsNull())
 374         {
 375                 args[i] = & arg5;
 376                 i ++;
 377         }
 378         if (!arg6.IsNull())
 379         {
 380                 args[i] = & arg6;
 381                 i ++;
 382         }
 383         wxVariant retVariant;
 384         if (!Invoke(property, DISPATCH_PROPERTYGET, retVariant, i, NULL, args))
 385         {
 386                 retVariant.MakeNull();
 387         }
 388         delete[] args;
 389         return retVariant;
 390 }
 391
 392 bool wxAutomationObject::PutProperty(const wxString& property, int noArgs, wxVariant args[])
 393 {
 394         wxVariant retVariant;
 395         if (!Invoke(property, DISPATCH_PROPERTYPUT, retVariant, noArgs, args))
 396         {
 397                 return FALSE;
 398         }
 399         return TRUE;
 400 }
 401
 402 bool wxAutomationObject::PutPropertyArray(const wxString& property, int noArgs, const wxVariant **args)
 403 {
 404         wxVariant retVariant;
 405         if (!Invoke(property, DISPATCH_PROPERTYPUT, retVariant, noArgs, NULL, args))
 406         {
 407                 return FALSE;
 408         }
 409         return TRUE;
 410 }
 411
 412 bool wxAutomationObject::PutProperty(const wxString& property,
 413                 const wxVariant& arg1, const wxVariant& arg2,
 414                 const wxVariant& arg3, const wxVariant& arg4,
 415                 const wxVariant& arg5, const wxVariant& arg6)
 416 {
 417         const wxVariant** args = new const wxVariant*[6];
 418         int i = 0;
 419         if (!arg1.IsNull())
 420         {
 421                 args[i] = & arg1;
 422                 i ++;
 423         }
 424         if (!arg2.IsNull())
 425         {
 426                 args[i] = & arg2;
 427                 i ++;
 428         }
 429         if (!arg3.IsNull())
 430         {
 431                 args[i] = & arg3;
 432                 i ++;
 433         }
 434         if (!arg4.IsNull())
 435         {
 436                 args[i] = & arg4;
 437                 i ++;
 438         }
 439         if (!arg5.IsNull())
 440         {
 441                 args[i] = & arg5;
 442                 i ++;
 443         }
 444         if (!arg6.IsNull())
 445         {
 446                 args[i] = & arg6;
 447                 i ++;
 448         }
 449         wxVariant retVariant;
 450         bool ret = Invoke(property, DISPATCH_PROPERTYPUT, retVariant, i, NULL, args);
 451         delete[] args;
 452         return ret;
 453 }
 454
 455
 456 // Uses DISPATCH_PROPERTYGET
 457 // and returns a dispatch pointer. The calling code should call Release
 458 // on the pointer, though this could be implicit by constructing an wxAutomationObject
 459 // with it and letting the destructor call Release.
 460 WXIDISPATCH* wxAutomationObject::GetDispatchProperty(const wxString& property, int noArgs, wxVariant args[]) const
 461 {
 462         wxVariant retVariant;
 463         if (Invoke(property, DISPATCH_PROPERTYGET, retVariant, noArgs, args))
 464         {
 465                 if (retVariant.GetType() == wxT("void*"))
 466                 {
 467                         return (WXIDISPATCH*) retVariant.GetVoidPtr();
 468                 }
 469         }
 470
 471         return (WXIDISPATCH*) NULL;
 472 }
 473
 474 // Uses DISPATCH_PROPERTYGET
 475 // and returns a dispatch pointer. The calling code should call Release
 476 // on the pointer, though this could be implicit by constructing an wxAutomationObject
 477 // with it and letting the destructor call Release.
 478 WXIDISPATCH* wxAutomationObject::GetDispatchProperty(const wxString& property, int noArgs, const wxVariant **args) const
 479 {
 480         wxVariant retVariant;
 481         if (Invoke(property, DISPATCH_PROPERTYGET, retVariant, noArgs, NULL, args))
 482         {
 483                 if (retVariant.GetType() == wxT("void*"))
 484                 {
 485                         return (WXIDISPATCH*) retVariant.GetVoidPtr();
 486                 }
 487         }
 488
 489         return (WXIDISPATCH*) NULL;
 490 }
 491
 492
 493 // A way of initialising another wxAutomationObject with a dispatch object
 494 bool wxAutomationObject::GetObject(wxAutomationObject& obj, const wxString& property, int noArgs, wxVariant args[]) const
 495 {
 496         WXIDISPATCH* dispatch = GetDispatchProperty(property, noArgs, args);
 497         if (dispatch)
 498         {
 499                 obj.SetDispatchPtr(dispatch);
 500                 return TRUE;
 501         }
 502         else
 503                 return FALSE;
 504 }
 505
 506 // A way of initialising another wxAutomationObject with a dispatch object
 507 bool wxAutomationObject::GetObject(wxAutomationObject& obj, const wxString& property, int noArgs, const wxVariant **args) const
 508 {
 509         WXIDISPATCH* dispatch = GetDispatchProperty(property, noArgs, args);
 510         if (dispatch)
 511         {
 512                 obj.SetDispatchPtr(dispatch);
 513                 return TRUE;
 514         }
 515         else
 516                 return FALSE;
 517 }
 518
 519 // Get a dispatch pointer from the current object associated
 520 // with a class id
 521 bool wxAutomationObject::GetInstance(const wxString& classId) const
 522 {
 523         if (m_dispatchPtr)
 524                 return FALSE;
 525
 526         CLSID clsId;
 527         IUnknown * pUnk = NULL;
 528
 529         BasicString unicodeName(classId.mb_str());
 530
 531         if (FAILED(CLSIDFromProgID((BSTR) unicodeName, &clsId)))
 532         {
 533                 wxLogWarning(wxT("Cannot obtain CLSID from ProgID"));
 534                 return FALSE;
 535         }
 536
 537         if (FAILED(GetActiveObject(clsId, NULL, &pUnk)))
 538         {
 539                 wxLogWarning(wxT("Cannot find an active object"));
 540                 return FALSE;
 541         }
 542
 543         if (pUnk->QueryInterface(IID_IDispatch, (LPVOID*) &m_dispatchPtr) != S_OK)
 544         {
 545                 wxLogWarning(wxT("Cannot find IDispatch interface"));
 546                 return FALSE;
 547         }
 548
 549         return TRUE;
 550 }
 551
 552 // Get a dispatch pointer from a new object associated
 553 // with the given class id
 554 bool wxAutomationObject::CreateInstance(const wxString& classId) const
 555 {
 556         if (m_dispatchPtr)
 557                 return FALSE;
 558
 559         CLSID clsId;
 560
 561         BasicString unicodeName(classId.mb_str());
 562
 563         if (FAILED(CLSIDFromProgID((BSTR) unicodeName, &clsId)))
 564         {
 565                 wxLogWarning(wxT("Cannot obtain CLSID from ProgID"));
 566                 return FALSE;
 567         }
 568
 569         // start a new copy of Excel, grab the IDispatch interface
 570         if (FAILED(CoCreateInstance(clsId, NULL, CLSCTX_LOCAL_SERVER, IID_IDispatch, (void**)&m_dispatchPtr)))
 571         {
 572                 wxLogWarning(wxT("Cannot start an instance of this class."));
 573                 return FALSE;
 574         }
 575
 576         return TRUE;
 577 }
 578
 579
 580 bool ConvertVariantToOle(const wxVariant& variant, VARIANTARG& oleVariant)
 581 {
 582         ClearVariant(&oleVariant);
 583         if (variant.IsNull())
 584         {
 585                 oleVariant.vt = VT_NULL;
 586                 return TRUE;
 587         }
 588
 589     wxString type(variant.GetType());
 590
 591
 592     if (type == wxT("long"))
 593     {
 594         oleVariant.vt = VT_I4;
 595         oleVariant.lVal = variant.GetLong() ;
 596     }
 597     // cVal not always present
 598 #ifndef __GNUWIN32__
 599     else if (type == wxT("char"))
 600     {
 601         oleVariant.vt=VT_I1;                    // Signed Char
 602         oleVariant.cVal=variant.GetChar();
 603     }
 604 #endif
 605     else if (type == wxT("double"))
 606     {
 607         oleVariant.vt = VT_R8;
 608         oleVariant.dblVal = variant.GetDouble();
 609     }
 610     else if (type == wxT("bool"))
 611     {
 612         oleVariant.vt = VT_BOOL;
 613         // 'bool' required for VC++ 4 apparently
 614 #if defined(__WATCOMC__) || (defined(__VISUALC__) && (__VISUALC__ <= 1000))
 615         oleVariant.bool = variant.GetBool();
 616 #else
 617         oleVariant.boolVal = variant.GetBool();
 618 #endif
 619     }
 620     else if (type == wxT("string"))
 621     {
 622         wxString str( variant.GetString() );
 623         oleVariant.vt = VT_BSTR;
 624         oleVariant.bstrVal = ConvertStringToOle(str);
 625     }
 626 // For some reason, Watcom C++ can't link variant.cpp with time/date classes compiled
 627 #if wxUSE_TIMEDATE && !defined(__WATCOMC__)
 628     else if (type == wxT("date"))
 629     {
 630         wxDate date( variant.GetDate() );
 631         oleVariant.vt = VT_DATE;
 632
 633                 if (!OleDateFromTm(date.GetYear(), date.GetMonth(), date.GetDay(),
 634                                 0, 0, 0, oleVariant.date))
 635                         return FALSE;
 636     }
 637     else if (type == wxT("time"))
 638     {
 639         wxTime time( variant.GetTime() );
 640         oleVariant.vt = VT_DATE;
 641
 642                 if (!OleDateFromTm(time.GetYear(), time.GetMonth(), time.GetDay(),
 643                         time.GetHour(), time.GetMinute(), time.GetSecond(), oleVariant.date))
 644                         return FALSE;
 645     }
 646 #endif
 647     else if (type == wxT("void*"))
 648     {
 649         oleVariant.vt = VT_DISPATCH;
 650         oleVariant.pdispVal = (IDispatch*) variant.GetVoidPtr();
 651     }
 652     else if (type == wxT("list") || type == wxT("stringlist"))
 653     {
 654         oleVariant.vt = VT_VARIANT | VT_ARRAY;
 655
 656             SAFEARRAY *psa;
 657             SAFEARRAYBOUND saBound;
 658             VARIANTARG *pvargBase;
 659             VARIANTARG *pvarg;
 660             int i, j;
 661
 662         int iCount = variant.GetCount();
 663
 664             saBound.lLbound = 0;
 665             saBound.cElements = iCount;
 666
 667             psa = SafeArrayCreate(VT_VARIANT, 1, &saBound);
 668             if (psa == NULL)
 669                     return FALSE;
 670
 671             SafeArrayAccessData(psa, (void**)&pvargBase);
 672
 673             pvarg = pvargBase;
 674             for (i = 0; i < iCount; i++)
 675             {
 676                     // copy each string in the list of strings
 677             wxVariant eachVariant(variant[i]);
 678             if (!ConvertVariantToOle(eachVariant, * pvarg))
 679             {
 680                             // memory failure:  back out and free strings alloc'ed up to
 681                             // now, and then the array itself.
 682                             pvarg = pvargBase;
 683                             for (j = 0; j < i; j++)
 684                             {
 685                                     SysFreeString(pvarg->bstrVal);
 686                                     pvarg++;
 687                             }
 688                             SafeArrayDestroy(psa);
 689                             return FALSE;
 690                     }
 691                     pvarg++;
 692             }
 693
 694             SafeArrayUnaccessData(psa);
 695
 696         oleVariant.parray = psa;
 697     }
 698     else
 699     {
 700         oleVariant.vt = VT_NULL;
 701         return FALSE;
 702     }
 703     return TRUE;
 704 }
 705
 706 #ifndef VT_TYPEMASK
 707 #define VT_TYPEMASK 0xfff
 708 #endif
 709
 710 bool ConvertOleToVariant(const VARIANTARG& oleVariant, wxVariant& variant)
 711 {
 712         switch (oleVariant.vt & VT_TYPEMASK)
 713         {
 714         case VT_BSTR:
 715                 {
 716                         wxString str(ConvertStringFromOle(oleVariant.bstrVal));
 717                         variant = str;
 718                         break;
 719                 }
 720         case VT_DATE:
 721                 {
 722 #if wxUSE_TIMEDATE
 723             struct tm tmTemp;
 724                         if (!TmFromOleDate(oleVariant.date, tmTemp))
 725                                 return FALSE;
 726
 727                         wxDate date(tmTemp.tm_yday, tmTemp.tm_mon, tmTemp.tm_year);
 728                         wxTime time(date, tmTemp.tm_hour, tmTemp.tm_min, tmTemp.tm_sec);
 729
 730                         variant = time;
 731 #endif
 732
 733             break;
 734                 }
 735         case VT_I4:
 736                 {
 737                         variant = (long) oleVariant.lVal;
 738                         break;
 739                 }
 740         case VT_I2:
 741                 {
 742                         variant = (long) oleVariant.iVal;
 743                         break;
 744                 }
 745
 746         case VT_BOOL:
 747                 {
 748 #if defined(__WATCOMC__) || (defined(_MSC_VER) && (_MSC_VER <= 1000) && !defined(__MWERKS__) ) //GC
 749 #ifndef HAVE_BOOL // Can't use bool operator if no native bool type
 750                         variant = (long) (oleVariant.bool != 0);
 751 #else
 752                         variant = (bool) (oleVariant.bool != 0);
 753 #endif
 754 #else
 755 #ifndef HAVE_BOOL // Can't use bool operator if no native bool type
 756                         variant = (long) (oleVariant.boolVal != 0);
 757 #else
 758                         variant = (bool) (oleVariant.boolVal != 0);
 759 #endif
 760 #endif
 761                         break;
 762                 }
 763         case VT_R8:
 764                 {
 765                         variant = oleVariant.dblVal;
 766                         break;
 767                 }
 768         case VT_ARRAY:
 769                 {
 770                         variant.ClearList();
 771
 772                         int cDims, cElements, i;
 773                         VARIANTARG* pvdata;
 774
 775                         // Iterate the dimensions: number of elements is x*y*z
 776                         for (cDims = 0, cElements = 1;
 777                                 cDims < oleVariant.parray->cDims; cDims ++)
 778                                         cElements *= oleVariant.parray->rgsabound[cDims].cElements;
 779
 780                         // Get a pointer to the data
 781                         HRESULT hr = SafeArrayAccessData(oleVariant.parray, (void HUGEP* FAR*) & pvdata);
 782                         if (hr != NOERROR)
 783                                 return FALSE;
 784                         // Iterate the data.
 785                         for (i = 0; i < cElements; i++)
 786                         {
 787                                 VARIANTARG& oleElement = pvdata[i];
 788                                 wxVariant vElement;
 789                                 if (!ConvertOleToVariant(oleElement, vElement))
 790                                         return FALSE;
 791
 792                                 variant.Append(vElement);
 793                         }
 794                         SafeArrayUnaccessData(oleVariant.parray);
 795                         break;
 796                 }
 797         case VT_DISPATCH:
 798                 {
 799                         variant = (void*) oleVariant.pdispVal;
 800                         break;
 801                 }
 802         case VT_NULL:
 803                 {
 804                         variant.MakeNull();
 805                         break;
 806                 }
 807         case VT_EMPTY:
 808                 {
 809                         break;  // Ignore Empty Variant, used only during destruction of objects
 810                 }
 811         default:
 812                 {
 813                         wxLogError(wxT("wxAutomationObject::ConvertOleToVariant: Unknown variant value type"));
 814                         return FALSE;
 815                 }
 816         }
 817     return TRUE;
 818 }
 819
 820 static BSTR ConvertStringToOle(const wxString& str)
 821 {
 822 /*
 823         unsigned int len = strlen((const char*) str);
 824         unsigned short* s = new unsigned short[len*2+2];
 825         unsigned int i;
 826         memset(s, 0, len*2+2);
 827         for (i=0; i < len; i++)
 828                 s[i*2] = str[i];
 829 */
 830         BasicString bstr(str.mb_str());
 831         return bstr.Get();
 832 }
 833
 834 static wxString ConvertStringFromOle(BSTR bStr)
 835 {
 836         int len = SysStringLen(bStr) + 1;
 837         char    *buf = new char[len];
 838         (void)wcstombs( buf, bStr, len);
 839
 840         wxString str(buf);
 841         delete[] buf;
 842         return str;
 843 }
 844
 845 // ----------------------------------------------------------------------------
 846 // BasicString
 847 // ----------------------------------------------------------------------------
 848
 849 // ctor takes an ANSI string and transforms it to Unicode
 850 BasicString::BasicString(const char *sz)
 851 {
 852   // get the size of required buffer
 853   UINT lenAnsi = strlen(sz);
 854   #ifdef __MWERKS__
 855   UINT lenWide = lenAnsi * 2 ;
 856   #else
 857   UINT lenWide = mbstowcs(NULL, sz, lenAnsi);
 858   #endif
 859
 860   if ( lenWide > 0 ) {
 861     m_wzBuf = new OLECHAR[lenWide + 1];
 862     mbstowcs(m_wzBuf, sz, lenAnsi);
 863     m_wzBuf[lenWide] = L'\0';
 864   }
 865   else {
 866     m_wzBuf = NULL;
 867   }
 868 }
 869
 870 // dtor frees memory
 871 BasicString::~BasicString()
 872 {
 873   delete [] m_wzBuf;
 874 }
 875
 876 /////////////////////////////////////////////////////////////////////////////
 877 // COleDateTime class HELPERS - implementation
 878
 879 BOOL OleDateFromTm(WORD wYear, WORD wMonth, WORD wDay,
 880         WORD wHour, WORD wMinute, WORD wSecond, DATE& dtDest)
 881 {
 882         // Validate year and month (ignore day of week and milliseconds)
 883         if (wYear > 9999 || wMonth < 1 || wMonth > 12)
 884                 return FALSE;
 885
 886         //  Check for leap year and set the number of days in the month
 887         BOOL bLeapYear = ((wYear & 3) == 0) &&
 888                 ((wYear % 100) != 0 || (wYear % 400) == 0);
 889
 890         int nDaysInMonth =
 891                 rgMonthDays[wMonth] - rgMonthDays[wMonth-1] +
 892                 ((bLeapYear && wDay == 29 && wMonth == 2) ? 1 : 0);
 893
 894         // Finish validating the date
 895         if (wDay < 1 || wDay > nDaysInMonth ||
 896                 wHour > 23 || wMinute > 59 ||
 897                 wSecond > 59)
 898         {
 899                 return FALSE;
 900         }
 901
 902         // Cache the date in days and time in fractional days
 903         long nDate;
 904         double dblTime;
 905
 906         //It is a valid date; make Jan 1, 1AD be 1
 907         nDate = wYear*365L + wYear/4 - wYear/100 + wYear/400 +
 908                 rgMonthDays[wMonth-1] + wDay;
 909
 910         //  If leap year and it's before March, subtract 1:
 911         if (wMonth <= 2 && bLeapYear)
 912                 --nDate;
 913
 914         //  Offset so that 12/30/1899 is 0
 915         nDate -= 693959L;
 916
 917         dblTime = (((long)wHour * 3600L) +  // hrs in seconds
 918                 ((long)wMinute * 60L) +  // mins in seconds
 919                 ((long)wSecond)) / 86400.;
 920
 921         dtDest = (double) nDate + ((nDate >= 0) ? dblTime : -dblTime);
 922
 923         return TRUE;
 924 }
 925
 926 BOOL TmFromOleDate(DATE dtSrc, struct tm& tmDest)
 927 {
 928         // The legal range does not actually span year 0 to 9999.
 929         if (dtSrc > MAX_DATE || dtSrc < MIN_DATE) // about year 100 to about 9999
 930                 return FALSE;
 931
 932         long nDays;             // Number of days since Dec. 30, 1899
 933         long nDaysAbsolute;     // Number of days since 1/1/0
 934         long nSecsInDay;        // Time in seconds since midnight
 935         long nMinutesInDay;     // Minutes in day
 936
 937         long n400Years;         // Number of 400 year increments since 1/1/0
 938         long n400Century;       // Century within 400 year block (0,1,2 or 3)
 939         long n4Years;           // Number of 4 year increments since 1/1/0
 940         long n4Day;             // Day within 4 year block
 941                                                         //  (0 is 1/1/yr1, 1460 is 12/31/yr4)
 942         long n4Yr;              // Year within 4 year block (0,1,2 or 3)
 943         BOOL bLeap4 = TRUE;     // TRUE if 4 year block includes leap year
 944
 945         double dblDate = dtSrc; // tempory serial date
 946
 947         // If a valid date, then this conversion should not overflow
 948         nDays = (long)dblDate;
 949
 950         // Round to the second
 951         dblDate += ((dtSrc > 0.0) ? HALF_SECOND : -HALF_SECOND);
 952
 953         nDaysAbsolute = (long)dblDate + 693959L; // Add days from 1/1/0 to 12/30/1899
 954
 955         dblDate = fabs(dblDate);
 956         nSecsInDay = (long)((dblDate - floor(dblDate)) * 86400.);
 957
 958         // Calculate the day of week (sun=1, mon=2...)
 959         //   -1 because 1/1/0 is Sat.  +1 because we want 1-based
 960         tmDest.tm_wday = (int)((nDaysAbsolute - 1) % 7L) + 1;
 961
 962         // Leap years every 4 yrs except centuries not multiples of 400.
 963         n400Years = (long)(nDaysAbsolute / 146097L);
 964
 965         // Set nDaysAbsolute to day within 400-year block
 966         nDaysAbsolute %= 146097L;
 967
 968         // -1 because first century has extra day
 969         n400Century = (long)((nDaysAbsolute - 1) / 36524L);
 970
 971         // Non-leap century
 972         if (n400Century != 0)
 973         {
 974                 // Set nDaysAbsolute to day within century
 975                 nDaysAbsolute = (nDaysAbsolute - 1) % 36524L;
 976
 977                 // +1 because 1st 4 year increment has 1460 days
 978                 n4Years = (long)((nDaysAbsolute + 1) / 1461L);
 979
 980                 if (n4Years != 0)
 981                         n4Day = (long)((nDaysAbsolute + 1) % 1461L);
 982                 else
 983                 {
 984                         bLeap4 = FALSE;
 985                         n4Day = (long)nDaysAbsolute;
 986                 }
 987         }
 988         else
 989         {
 990                 // Leap century - not special case!
 991                 n4Years = (long)(nDaysAbsolute / 1461L);
 992                 n4Day = (long)(nDaysAbsolute % 1461L);
 993         }
 994
 995         if (bLeap4)
 996         {
 997                 // -1 because first year has 366 days
 998                 n4Yr = (n4Day - 1) / 365;
 999
1000                 if (n4Yr != 0)
1001                         n4Day = (n4Day - 1) % 365;
1002         }
1003         else
1004         {
1005                 n4Yr = n4Day / 365;
1006                 n4Day %= 365;
1007         }
1008
1009         // n4Day is now 0-based day of year. Save 1-based day of year, year number
1010         tmDest.tm_yday = (int)n4Day + 1;
1011         tmDest.tm_year = n400Years * 400 + n400Century * 100 + n4Years * 4 + n4Yr;
1012
1013         // Handle leap year: before, on, and after Feb. 29.
1014         if (n4Yr == 0 && bLeap4)
1015         {
1016                 // Leap Year
1017                 if (n4Day == 59)
1018                 {
1019                         /* Feb. 29 */
1020                         tmDest.tm_mon = 2;
1021                         tmDest.tm_mday = 29;
1022                         goto DoTime;
1023                 }
1024
1025                 // Pretend it's not a leap year for month/day comp.
1026                 if (n4Day >= 60)
1027                         --n4Day;
1028         }
1029
1030         // Make n4DaY a 1-based day of non-leap year and compute
1031         //  month/day for everything but Feb. 29.
1032         ++n4Day;
1033
1034         // Month number always >= n/32, so save some loop time */
1035         for (tmDest.tm_mon = (n4Day >> 5) + 1;
1036                 n4Day > rgMonthDays[tmDest.tm_mon]; tmDest.tm_mon++);
1037
1038         tmDest.tm_mday = (int)(n4Day - rgMonthDays[tmDest.tm_mon-1]);
1039
1040 DoTime:
1041         if (nSecsInDay == 0)
1042                 tmDest.tm_hour = tmDest.tm_min = tmDest.tm_sec = 0;
1043         else
1044         {
1045                 tmDest.tm_sec = (int)nSecsInDay % 60L;
1046                 nMinutesInDay = nSecsInDay / 60L;
1047                 tmDest.tm_min = (int)nMinutesInDay % 60;
1048                 tmDest.tm_hour = (int)nMinutesInDay / 60;
1049         }
1050
1051         return TRUE;
1052 }
1053
1054 // this function is not used
1055 #if 0
1056 void TmConvertToStandardFormat(struct tm& tmSrc)
1057 {
1058         // Convert afx internal tm to format expected by runtimes (_tcsftime, etc)
1059         tmSrc.tm_year -= 1900;  // year is based on 1900
1060         tmSrc.tm_mon -= 1;      // month of year is 0-based
1061         tmSrc.tm_wday -= 1;     // day of week is 0-based
1062         tmSrc.tm_yday -= 1;     // day of year is 0-based
1063 }
1064
1065 double DoubleFromDate(DATE dt)
1066 {
1067         // No problem if positive
1068         if (dt >= 0)
1069                 return dt;
1070
1071         // If negative, must convert since negative dates not continuous
1072         // (examples: -1.25 to -.75, -1.50 to -.50, -1.75 to -.25)
1073         double temp = ceil(dt);
1074         return temp - (dt - temp);
1075 }
1076
1077 DATE DateFromDouble(double dbl)
1078 {
1079         // No problem if positive
1080         if (dbl >= 0)
1081                 return dbl;
1082
1083         // If negative, must convert since negative dates not continuous
1084         // (examples: -.75 to -1.25, -.50 to -1.50, -.25 to -1.75)
1085         double temp = floor(dbl); // dbl is now whole part
1086         return temp + (temp - dbl);
1087 }
1088 #endif // 0
1089
1090 /*
1091  *  ClearVariant
1092  *
1093  *  Zeros a variant structure without regard to current contents
1094  */
1095 static void ClearVariant(VARIANTARG *pvarg)
1096 {
1097         pvarg->vt = VT_EMPTY;
1098         pvarg->wReserved1 = 0;
1099         pvarg->wReserved2 = 0;
1100         pvarg->wReserved3 = 0;
1101         pvarg->lVal = 0;
1102 }
1103
1104 /*
1105  *  ReleaseVariant
1106  *
1107  *  Clears a particular variant structure and releases any external objects
1108  *  or memory contained in the variant.  Supports the data types listed above.
1109  */
1110 static void ReleaseVariant(VARIANTARG *pvarg)
1111 {
1112         VARTYPE vt;
1113         VARIANTARG _huge *pvargArray;
1114         long lLBound, lUBound, l;
1115
1116         vt = pvarg->vt & 0xfff;         // mask off flags
1117
1118         // check if an array.  If so, free its contents, then the array itself.
1119         if (V_ISARRAY(pvarg))
1120         {
1121                 // variant arrays are all this routine currently knows about.  Since a
1122                 // variant can contain anything (even other arrays), call ourselves
1123                 // recursively.
1124                 if (vt == VT_VARIANT)
1125                 {
1126                         SafeArrayGetLBound(pvarg->parray, 1, &lLBound);
1127                         SafeArrayGetUBound(pvarg->parray, 1, &lUBound);
1128
1129                         if (lUBound > lLBound)
1130                         {
1131                                 lUBound -= lLBound;
1132
1133                                 SafeArrayAccessData(pvarg->parray, (void**)&pvargArray);
1134
1135                                 for (l = 0; l < lUBound; l++)
1136                                 {
1137                                         ReleaseVariant(pvargArray);
1138                                         pvargArray++;
1139                                 }
1140
1141                                 SafeArrayUnaccessData(pvarg->parray);
1142                         }
1143                 }
1144                 else
1145                 {
1146                         wxLogWarning(wxT("ReleaseVariant: Array contains non-variant type"));
1147                 }
1148
1149                 // Free the array itself.
1150                 SafeArrayDestroy(pvarg->parray);
1151         }
1152         else
1153         {
1154                 switch (vt)
1155                 {
1156                         case VT_DISPATCH:
1157                                 if (pvarg->pdispVal)
1158                                         pvarg->pdispVal->Release();
1159                                 break;
1160
1161                         case VT_BSTR:
1162                                 SysFreeString(pvarg->bstrVal);
1163                                 break;
1164
1165                         case VT_I2:
1166                         case VT_BOOL:
1167                         case VT_R8:
1168                         case VT_ERROR:          // to avoid erroring on an error return from Excel
1169                                 // no work for these types
1170                                 break;
1171
1172                         default:
1173                                 wxLogWarning(wxT("ReleaseVariant: Unknown type"));
1174                                 break;
1175                 }
1176         }
1177
1178         ClearVariant(pvarg);
1179 }
1180
1181 #if 0
1182
1183 void ShowException(LPOLESTR szMember, HRESULT hr, EXCEPINFO *pexcep, unsigned int uiArgErr)
1184 {
1185         TCHAR szBuf[512];
1186
1187         switch (GetScode(hr))
1188         {
1189                 case DISP_E_UNKNOWNNAME:
1190                         wsprintf(szBuf, L"%s: Unknown name or named argument.", szMember);
1191                         break;
1192
1193                 case DISP_E_BADPARAMCOUNT:
1194                         wsprintf(szBuf, L"%s: Incorrect number of arguments.", szMember);
1195                         break;
1196
1197                 case DISP_E_EXCEPTION:
1198                         wsprintf(szBuf, L"%s: Error %d: ", szMember, pexcep->wCode);
1199                         if (pexcep->bstrDescription != NULL)
1200                                 lstrcat(szBuf, pexcep->bstrDescription);
1201                         else
1202                                 lstrcat(szBuf, L"<<No Description>>");
1203                         break;
1204
1205                 case DISP_E_MEMBERNOTFOUND:
1206                         wsprintf(szBuf, L"%s: method or property not found.", szMember);
1207                         break;
1208
1209                 case DISP_E_OVERFLOW:
1210                         wsprintf(szBuf, L"%s: Overflow while coercing argument values.", szMember);
1211                         break;
1212
1213                 case DISP_E_NONAMEDARGS:
1214                         wsprintf(szBuf, L"%s: Object implementation does not support named arguments.",
1215                                                 szMember);
1216                     break;
1217
1218                 case DISP_E_UNKNOWNLCID:
1219                         wsprintf(szBuf, L"%s: The locale ID is unknown.", szMember);
1220                         break;
1221
1222                 case DISP_E_PARAMNOTOPTIONAL:
1223                         wsprintf(szBuf, L"%s: Missing a required parameter.", szMember);
1224                         break;
1225
1226                 case DISP_E_PARAMNOTFOUND:
1227                         wsprintf(szBuf, L"%s: Argument not found, argument %d.", szMember, uiArgErr);
1228                         break;
1229
1230                 case DISP_E_TYPEMISMATCH:
1231                         wsprintf(szBuf, L"%s: Type mismatch, argument %d.", szMember, uiArgErr);
1232                         break;
1233
1234                 default:
1235                         wsprintf(szBuf, L"%s: Unknown error occured.", szMember);
1236                         break;
1237         }
1238
1239         wxLogWarning(szBuf);
1240 }
1241
1242 #endif
1243
1244 #endif // __WATCOMC__
1245