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