dlls/oleaut32/safearray.c

   1 /*************************************************************************
   2  * OLE Automation
   3  * SafeArray Implementation
   4  *
   5  * This file contains the implementation of the SafeArray interface.
   6  *
   7  * Copyright 1999 Sylvain St-Germain
   8  */
   9
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include "windef.h"
  13 #include "winerror.h"
  14 #include "winbase.h"
  15 #include "oleauto.h"
  16 #include "wine/obj_base.h"
  17 #include "debugtools.h"
  18
  19 DEFAULT_DEBUG_CHANNEL(ole)
  20
  21 /* Localy used methods */
  22 static INT
  23 endOfDim(LONG *coor, SAFEARRAYBOUND *mat, LONG dim, LONG realDim);
  24
  25 static ULONG
  26 calcDisplacement(LONG *coor, SAFEARRAYBOUND *mat, LONG dim);
  27
  28 static BOOL
  29 isPointer(USHORT feature);
  30
  31 static INT
  32 getFeatures(VARTYPE vt);
  33
  34 static BOOL
  35 validCoordinate(LONG *coor, SAFEARRAY *psa);
  36
  37 static BOOL
  38 resizeSafeArray(SAFEARRAY *psa, LONG lDelta);
  39
  40 static BOOL
  41 validArg(SAFEARRAY *psa);
  42
  43 static ULONG
  44 getArraySize(SAFEARRAY *psa);
  45
  46 static HRESULT
  47 duplicateData(SAFEARRAY *psa, SAFEARRAY **ppsaOut);
  48
  49 /* Association between VARTYPE and their size.
  50    A size of zero is defined for the unsupported types.  */
  51
  52 #define VARTYPE_NOT_SUPPORTED 0
  53 const static ULONG VARTYPE_SIZE[] =
  54 {
  55   /* this is taken from wtypes.h.  Only [S]es are supported by the SafeArray */
  56 VARTYPE_NOT_SUPPORTED,  /* VT_EMPTY    [V]   [P]    nothing                     */
  57 VARTYPE_NOT_SUPPORTED,  /* VT_NULL     [V]   [P]    SQL style Nul       */
  58 2,                          /* VT_I2       [V][T][P][S] 2 byte signed int */
  59 4,                          /* VT_I4       [V][T][P][S] 4 byte signed int */
  60 4,                          /* VT_R4       [V][T][P][S] 4 byte real     */
  61 8,                          /* VT_R8       [V][T][P][S] 8 byte real     */
  62 8,                      /* VT_CY       [V][T][P][S] currency */
  63 8,                          /* VT_DATE     [V][T][P][S] date */
  64 4,                          /* VT_BSTR     [V][T][P][S] OLE Automation string*/
  65 4,                          /* VT_DISPATCH [V][T][P][S] IDispatch *     */
  66 4,                      /* VT_ERROR    [V][T]   [S] SCODE       */
  67 4,                          /* VT_BOOL     [V][T][P][S] True=-1, False=0*/
  68 24,                     /* VT_VARIANT  [V][T][P][S] VARIANT *   */
  69 4,                          /* VT_UNKNOWN  [V][T]   [S] IUnknown * */
  70 16,                         /* VT_DECIMAL  [V][T]   [S] 16 byte fixed point     */
  71 VARTYPE_NOT_SUPPORTED,                         /* no VARTYPE here..... */
  72 VARTYPE_NOT_SUPPORTED,  /* VT_I1          [T]       signed char */
  73 1,                          /* VT_UI1      [V][T][P][S] unsigned char                   */
  74 VARTYPE_NOT_SUPPORTED,  /* VT_UI2         [T][P]    unsigned short      */
  75 VARTYPE_NOT_SUPPORTED,  /* VT_UI4         [T][P]    unsigned short      */
  76 VARTYPE_NOT_SUPPORTED,  /* VT_I8          [T][P]    signed 64-bit int                   */
  77 VARTYPE_NOT_SUPPORTED,  /* VT_UI8         [T][P]    unsigned 64-bit int         */
  78 VARTYPE_NOT_SUPPORTED,  /* VT_INT         [T]       signed machine int          */
  79 VARTYPE_NOT_SUPPORTED,  /* VT_UINT        [T]       unsigned machine int        */
  80 VARTYPE_NOT_SUPPORTED,  /* VT_VOID        [T]       C style void                        */
  81 VARTYPE_NOT_SUPPORTED,  /* VT_HRESULT     [T]       Standard return type        */
  82 VARTYPE_NOT_SUPPORTED,  /* VT_PTR         [T]       pointer type                        */
  83 VARTYPE_NOT_SUPPORTED,  /* VT_SAFEARRAY   [T]       (use VT_ARRAY in VARIANT)*/
  84 VARTYPE_NOT_SUPPORTED,  /* VT_CARRAY      [T]       C style array                       */
  85 VARTYPE_NOT_SUPPORTED,  /* VT_USERDEFINED [T]       user defined type                   */
  86 VARTYPE_NOT_SUPPORTED,  /* VT_LPSTR       [T][P]    null terminated string      */
  87 VARTYPE_NOT_SUPPORTED,  /* VT_LPWSTR      [T][P]    wide null term string               */
  88 VARTYPE_NOT_SUPPORTED,  /* VT_FILETIME       [P]    FILETIME                    */
  89 VARTYPE_NOT_SUPPORTED,  /* VT_BLOB           [P]    Length prefixed bytes */
  90 VARTYPE_NOT_SUPPORTED,  /* VT_STREAM         [P]    Name of stream follows              */
  91 VARTYPE_NOT_SUPPORTED,  /* VT_STORAGE        [P]    Name of storage follows     */
  92 VARTYPE_NOT_SUPPORTED,  /* VT_STREAMED_OBJECT[P]    Stream contains an object*/
  93 VARTYPE_NOT_SUPPORTED,  /* VT_STORED_OBJECT  [P]    Storage contains object*/
  94 VARTYPE_NOT_SUPPORTED,  /* VT_BLOB_OBJECT    [P]    Blob contains an object*/
  95 VARTYPE_NOT_SUPPORTED,  /* VT_CF             [P]    Clipboard format                    */
  96 VARTYPE_NOT_SUPPORTED,  /* VT_CLSID          [P]    A Class ID                  */
  97 VARTYPE_NOT_SUPPORTED,  /* VT_VECTOR         [P]    simple counted array                */
  98 VARTYPE_NOT_SUPPORTED,  /* VT_ARRAY    [V]          SAFEARRAY*                  */
  99 VARTYPE_NOT_SUPPORTED   /* VT_BYREF    [V]          void* for local use */
 100 };
 101
 102 const static int LAST_VARTYPE = sizeof(VARTYPE_SIZE)/sizeof(ULONG);
 103
 104
 105 /*************************************************************************
 106  * Allocate the appropriate amount of memory for the SafeArray descriptor
 107  */
 108 HRESULT WINAPI SafeArrayAllocDescriptor(
 109   UINT    cDims,
 110   SAFEARRAY **ppsaOut)
 111 {
 112   SAFEARRAYBOUND *sab;
 113   LONG allocSize = 0;
 114
 115   /* SAFEARRAY + SAFEARRAYBOUND * (cDims -1) ( -1 because there is already one
 116                                              ( in SAFEARRAY struct */
 117   allocSize = sizeof(**ppsaOut) + (sizeof(*sab) * (cDims-1));
 118
 119   /* Allocate memory for SAFEARRAY struc */
 120   if(( (*ppsaOut)=HeapAlloc(
 121         GetProcessHeap(), HEAP_ZERO_MEMORY, allocSize)) == NULL){
 122     return(E_UNEXPECTED);
 123   }
 124   TRACE("SafeArray: %lu bytes allocated for descriptor.\n", allocSize);
 125
 126   return(S_OK);
 127 }
 128
 129 /*************************************************************************
 130  * Allocate the appropriate amount of data for the SafeArray data
 131  */
 132 HRESULT WINAPI SafeArrayAllocData(
 133   SAFEARRAY *psa)
 134 {
 135   ULONG  ulWholeArraySize;   /* to store the size of the whole thing */
 136
 137   if(! validArg(psa))
 138     return E_INVALIDARG;
 139
 140   ulWholeArraySize = getArraySize(psa);
 141
 142   /* Allocate memory for the data itself */
 143   if((psa->pvData = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
 144         psa->cbElements*ulWholeArraySize)) == NULL)
 145     return(E_UNEXPECTED);
 146
 147   TRACE("SafeArray: %lu bytes allocated for data at %p (%lu objects).\n",
 148     psa->cbElements*ulWholeArraySize, psa->pvData, ulWholeArraySize);
 149
 150   return(S_OK);
 151 }
 152
 153 /*************************************************************************
 154  * Create a SafeArray object by encapsulating AllocDescriptor and AllocData
 155  */
 156 SAFEARRAY* WINAPI SafeArrayCreate(
 157   VARTYPE        vt,
 158   UINT         cDims,
 159   SAFEARRAYBOUND *rgsabound)
 160 {
 161   SAFEARRAY *psa;
 162   HRESULT   hRes;
 163   USHORT    cDim;
 164
 165   /* Validate supported VARTYPE */
 166   if ( (vt >= LAST_VARTYPE) ||
 167        ( VARTYPE_SIZE[vt] == VARTYPE_NOT_SUPPORTED ) )
 168     return NULL;
 169
 170   /* Allocate memory for the array descriptor */
 171   if( FAILED( hRes = SafeArrayAllocDescriptor(cDims, &psa)))
 172     return NULL;
 173
 174   /* setup data members... */
 175   psa->cDims     = cDims;
 176   psa->fFeatures = getFeatures(vt);
 177   psa->cLocks    = 0;
 178   psa->pvData    = NULL;
 179   psa->cbElements= VARTYPE_SIZE[vt];
 180
 181   /* Invert the bounds ... */
 182   for(cDim=0; cDim < psa->cDims; cDim++) {
 183     psa->rgsabound[cDim].cElements = rgsabound[psa->cDims-cDim-1].cElements;
 184     psa->rgsabound[cDim].lLbound   = rgsabound[psa->cDims-cDim-1].lLbound;
 185   }
 186
 187   /* allocate memory for the data... */
 188   if( FAILED( hRes = SafeArrayAllocData(psa))) {
 189     SafeArrayDestroyDescriptor(psa);
 190     ERR("() : Failed to allocate the Safe Array data\n");
 191     return NULL;
 192   }
 193
 194   return(psa);
 195 }
 196
 197 /*************************************************************************
 198  * Frees the memory associated with the descriptor.
 199  */
 200 HRESULT WINAPI SafeArrayDestroyDescriptor(
 201   SAFEARRAY *psa)
 202 {
 203   /* Check for lockness before to free... */
 204   if(psa->cLocks > 0)
 205     return DISP_E_ARRAYISLOCKED;
 206
 207   /* The array is unlocked, then, deallocate memory */
 208   if(HeapFree( GetProcessHeap(), 0, psa) == FALSE)
 209     return E_UNEXPECTED;
 210
 211   return(S_OK);
 212 }
 213
 214
 215 /*************************************************************************
 216  * Increment the lock counter
 217  *
 218  * Doc says (MSDN Library ) that psa->pvData should be made available (!= NULL)
 219  * only when psa->cLocks is > 0... I don't get it since pvData is allocated
 220  * before the array is locked, therefore
 221  */
 222 HRESULT WINAPI SafeArrayLock(
 223   SAFEARRAY *psa)
 224 {
 225   if(! validArg(psa))
 226     return E_INVALIDARG;
 227
 228   psa->cLocks++;
 229
 230   return(S_OK);
 231 }
 232
 233 /*************************************************************************
 234  * Decrement the lock counter
 235  */
 236 HRESULT WINAPI SafeArrayUnlock(
 237   SAFEARRAY *psa)
 238 {
 239   if(! validArg(psa))
 240     return E_INVALIDARG;
 241
 242   if (psa->cLocks > 0)
 243     psa->cLocks--;
 244
 245   return(S_OK);
 246 }
 247
 248
 249 /*************************************************************************
 250  * Set the data at the given coordinate
 251  */
 252 HRESULT WINAPI SafeArrayPutElement(
 253   SAFEARRAY *psa,
 254   LONG      *rgIndices,
 255   void      *pv)
 256 {
 257   ULONG stepCountInSAData     = 0;    /* Number of array item to skip to get to
 258                                          the desired one... */
 259   PVOID elementStorageAddress = NULL; /* Adress to store the data */
 260   BSTR  pbstrReAllocStr     = NULL; /* BSTR reallocated */
 261
 262   /* Validate the index given */
 263   if(! validCoordinate(rgIndices, psa))
 264     return DISP_E_BADINDEX;
 265   if(! validArg(psa))
 266     return E_INVALIDARG;
 267
 268   if( SafeArrayLock(psa) == S_OK) {
 269
 270     /* Figure out the number of items to skip */
 271     stepCountInSAData = calcDisplacement(rgIndices, psa->rgsabound, psa->cDims);
 272
 273     /* Figure out the number of byte to skip ... */
 274     elementStorageAddress = (char *) psa->pvData+(stepCountInSAData*psa->cbElements);
 275
 276     if(isPointer(psa->fFeatures)) { /* increment ref count for this pointer */
 277
 278       *((VOID**)elementStorageAddress) = *(VOID**)pv;
 279       IUnknown_AddRef( *(IUnknown**)pv);
 280
 281     } else {
 282
 283       if(psa->fFeatures == FADF_BSTR) { /* Create a new object */
 284
 285         if((pbstrReAllocStr = SysAllocString( (OLECHAR*)pv )) == NULL) {
 286           SafeArrayUnlock(psa);
 287           return E_OUTOFMEMORY;
 288         } else
 289           *((BSTR*)elementStorageAddress) = pbstrReAllocStr;
 290
 291       } else /* dupplicate the memory */
 292         memcpy(elementStorageAddress, pv, SafeArrayGetElemsize(psa) );
 293     }
 294
 295   } else {
 296     ERR("SafeArray: Cannot lock array....\n");
 297     return E_UNEXPECTED; /* UNDOC error condition */
 298   }
 299
 300   TRACE("SafeArray: item put at adress %p.\n",elementStorageAddress);
 301   return SafeArrayUnlock(psa);
 302 }
 303
 304
 305 /*************************************************************************
 306  * Return the data element corresponding the the given coordinate
 307  */
 308 HRESULT WINAPI SafeArrayGetElement(
 309   SAFEARRAY *psa,
 310   LONG      *rgIndices,
 311   void      *pv)
 312 {
 313   ULONG stepCountInSAData     = 0;    /* Number of array item to skip to get to
 314                                          the desired one... */
 315   PVOID elementStorageAddress = NULL; /* Adress to store the data */
 316   BSTR  pbstrReturnedStr    = NULL; /* BSTR reallocated */
 317
 318   if(! validArg(psa))
 319     return E_INVALIDARG;
 320
 321   if(! validCoordinate(rgIndices, psa)) /* Validate the index given */
 322     return(DISP_E_BADINDEX);
 323
 324   if( SafeArrayLock(psa) == S_OK) {
 325
 326     /* Figure out the number of items to skip */
 327     stepCountInSAData = calcDisplacement(rgIndices, psa->rgsabound, psa->cDims);
 328
 329     /* Figure out the number of byte to skip ... */
 330     elementStorageAddress = (char *) psa->pvData+(stepCountInSAData*psa->cbElements);
 331
 332     if( psa->fFeatures == FADF_BSTR) {           /* reallocate the obj */
 333       if( (pbstrReturnedStr =
 334           SysAllocString( *(OLECHAR**)elementStorageAddress )) == NULL) {
 335         SafeArrayUnlock(psa);
 336         return E_OUTOFMEMORY;
 337       } else
 338         *((BSTR*)pv) = pbstrReturnedStr;
 339
 340     } else if( isPointer(psa->fFeatures) )       /* simply copy the pointer */
 341        pv = *((PVOID*)elementStorageAddress);
 342     else                                         /* copy the bytes */
 343       memcpy(pv, elementStorageAddress, SafeArrayGetElemsize(psa) );
 344
 345   } else {
 346     ERR("SafeArray: Cannot lock array....\n");
 347     return E_UNEXPECTED; /* UNDOC error condition */
 348   }
 349
 350   return( SafeArrayUnlock(psa) );
 351 }
 352
 353 /*************************************************************************
 354  * return the UP bound for a given array dimension
 355  */
 356 HRESULT WINAPI SafeArrayGetUBound(
 357   SAFEARRAY *psa,
 358   UINT    nDim,
 359   LONG      *plUbound)
 360 {
 361   if(! validArg(psa))
 362     return E_INVALIDARG;
 363
 364   if(nDim > psa->cDims)
 365     return DISP_E_BADINDEX;
 366
 367   *plUbound = psa->rgsabound[nDim-1].lLbound +
 368               psa->rgsabound[nDim-1].cElements - 1;
 369
 370   return S_OK;
 371 }
 372
 373 /*************************************************************************
 374  * Return the LO bound for a given array dimension
 375  */
 376 HRESULT WINAPI SafeArrayGetLBound(
 377   SAFEARRAY *psa,
 378   UINT    nDim,
 379   LONG      *plLbound)
 380 {
 381   if(! validArg(psa))
 382     return E_INVALIDARG;
 383
 384   if(nDim > psa->cDims)
 385     return DISP_E_BADINDEX;
 386
 387   *plLbound = psa->rgsabound[nDim-1].lLbound;
 388   return S_OK;
 389 }
 390
 391 /*************************************************************************
 392  * returns the number of dimension in the array
 393  */
 394 UINT WINAPI SafeArrayGetDim(
 395   SAFEARRAY * psa)
 396 {
 397   /*
 398    * A quick test in Windows shows that the behavior here for an invalid
 399    * pointer is to return 0.
 400    */
 401   if(! validArg(psa))
 402     return 0;
 403
 404   return psa->cDims;
 405 }
 406
 407 /*************************************************************************
 408  * Return the size of the element in the array
 409  */
 410 UINT WINAPI SafeArrayGetElemsize(
 411   SAFEARRAY * psa)
 412 {
 413   /*
 414    * A quick test in Windows shows that the behavior here for an invalid
 415    * pointer is to return 0.
 416    */
 417   if(! validArg(psa))
 418     return 0;
 419
 420   return psa->cbElements;
 421 }
 422
 423 /*************************************************************************
 424  * increment the access count and return the data
 425  */
 426 HRESULT WINAPI SafeArrayAccessData(
 427   SAFEARRAY *psa,
 428   void      **ppvData)
 429 {
 430   HRESULT hRes;
 431
 432   if(! validArg(psa))
 433     return E_INVALIDARG;
 434
 435   hRes = SafeArrayLock(psa);
 436
 437   switch (hRes) {
 438     case S_OK:
 439       (*ppvData) = psa->pvData;
 440       break;
 441     case E_INVALIDARG:
 442       (*ppvData) = NULL;
 443       return E_INVALIDARG;
 444   }
 445
 446   return S_OK;
 447 }
 448
 449
 450 /*************************************************************************
 451  * Decrement the access count
 452  */
 453 HRESULT WINAPI SafeArrayUnaccessData(
 454   SAFEARRAY * psa)
 455 {
 456   if(! validArg(psa))
 457     return E_INVALIDARG;
 458
 459   return(SafeArrayUnlock(psa));
 460 }
 461
 462 /************************************************************************
 463  * Return a pointer to the element at rgIndices
 464  */
 465 HRESULT WINAPI SafeArrayPtrOfIndex(
 466   SAFEARRAY *psa,
 467   LONG      *rgIndices,
 468   void      **ppvData)
 469 {
 470   ULONG stepCountInSAData     = 0;    /* Number of array item to skip to get to
 471                                          the desired one... */
 472
 473   if(! validArg(psa))
 474     return E_INVALIDARG;
 475
 476   if(! validCoordinate(rgIndices, psa))
 477     return DISP_E_BADINDEX;
 478
 479   /* Figure out the number of items to skip */
 480   stepCountInSAData = calcDisplacement(rgIndices, psa->rgsabound, psa->cDims);
 481
 482   *ppvData = (char *) psa->pvData+(stepCountInSAData*psa->cbElements);
 483
 484   return S_OK;
 485 }
 486
 487 /************************************************************************
 488  * Frees the memory data bloc
 489  */
 490 HRESULT WINAPI SafeArrayDestroyData(
 491   SAFEARRAY *psa)
 492 {
 493   HRESULT  hRes;
 494   ULONG    ulWholeArraySize; /* count spot in array  */
 495   ULONG    ulDataIter;       /* to iterate the data space */
 496   IUnknown *punk;
 497   BSTR   bstr;
 498
 499   if(! validArg(psa))
 500     return E_INVALIDARG;
 501
 502   if(psa->cLocks > 0)
 503     return DISP_E_ARRAYISLOCKED;
 504
 505   ulWholeArraySize = getArraySize(psa);
 506
 507   if(isPointer(psa->fFeatures)) {           /* release the pointers */
 508
 509     for(ulDataIter=0; ulDataIter < ulWholeArraySize; ulDataIter++) {
 510       punk = *(IUnknown**)((char *) psa->pvData+(ulDataIter*(psa->cbElements)));
 511
 512       if( punk != NULL)
 513         IUnknown_Release(punk);
 514     }
 515
 516   } else if(psa->fFeatures & FADF_BSTR) {  /* deallocate the obj */
 517
 518     for(ulDataIter=0; ulDataIter < ulWholeArraySize; ulDataIter++) {
 519       bstr = *(BSTR*)((char *) psa->pvData+(ulDataIter*(psa->cbElements)));
 520
 521       if( bstr != NULL)
 522         SysFreeString( bstr );
 523     }
 524   }
 525
 526   /* check if this array is a Vector, in which case do not free the data
 527      block since it has been allocated by AllocDescriptor and therefore
 528      deserve to be freed by DestroyDescriptor */
 529   if(!(psa->fFeatures & FADF_FIXEDSIZE)) { /* Set when we do CreateVector */
 530
 531     /* free the whole chunk */
 532     if((hRes = HeapFree( GetProcessHeap(), 0, psa->pvData)) == 0) /*falied*/
 533       return E_UNEXPECTED; /* UNDOC error condition */
 534
 535     psa->pvData = NULL;
 536   }
 537
 538   return S_OK;
 539 }
 540
 541 /************************************************************************
 542  * Copy the psaSource's data block into psaTarget if dimension and size
 543  * permits it.
 544  */
 545 HRESULT WINAPI SafeArrayCopyData(
 546   SAFEARRAY *psaSource,
 547   SAFEARRAY **psaTarget)
 548 {
 549   USHORT   cDimCount;        /* looper */
 550   LONG     lDelta;           /* looper */
 551   IUnknown *punk;
 552   ULONG    ulWholeArraySize; /* Number of item in SA */
 553   BSTR   bstr;
 554
 555   if(! (validArg(psaSource) && validArg(*psaTarget)) )
 556     return E_INVALIDARG;
 557
 558   if(SafeArrayGetDim(psaSource) != SafeArrayGetDim(*psaTarget))
 559     return E_INVALIDARG;
 560
 561   ulWholeArraySize = getArraySize(psaSource);
 562
 563   /* The two arrays boundaries must be of same lenght */
 564   for(cDimCount=0;cDimCount < psaSource->cDims; cDimCount++)
 565     if( psaSource->rgsabound[cDimCount].cElements !=
 566       (*psaTarget)->rgsabound[cDimCount].cElements)
 567       return E_INVALIDARG;
 568
 569   if( isPointer((*psaTarget)->fFeatures) ) {         /* the target contains ptr
 570                                                         that must be released */
 571     for(lDelta=0;lDelta < ulWholeArraySize; lDelta++) {
 572       punk = *(IUnknown**)
 573         ((char *) (*psaTarget)->pvData + (lDelta * (*psaTarget)->cbElements));
 574
 575       if( punk != NULL)
 576         IUnknown_Release(punk);
 577     }
 578
 579   } else if( (*psaTarget)->fFeatures & FADF_BSTR) {  /* the target contain BSTR
 580                                                         that must be freed */
 581     for(lDelta=0;lDelta < ulWholeArraySize; lDelta++) {
 582       bstr =
 583         *(BSTR*)((char *) (*psaTarget)->pvData + (lDelta * (*psaTarget)->cbElements));
 584
 585       if( bstr != NULL)
 586         SysFreeString( bstr );
 587     }
 588   }
 589
 590   return duplicateData(psaSource, psaTarget);
 591 }
 592
 593 /************************************************************************
 594  * Deallocates all memory reserved for the SafeArray
 595  */
 596 HRESULT WINAPI SafeArrayDestroy(
 597   SAFEARRAY * psa)
 598 {
 599   HRESULT hRes;
 600
 601   if(! validArg(psa))
 602     return E_INVALIDARG;
 603
 604   if(psa->cLocks > 0)
 605     return DISP_E_ARRAYISLOCKED;
 606
 607   if((hRes = SafeArrayDestroyData( psa )) == S_OK)
 608     if((hRes = SafeArrayDestroyDescriptor( psa )) == S_OK)
 609       return S_OK;
 610
 611   return E_UNEXPECTED; /* UNDOC error condition */
 612 }
 613
 614 /************************************************************************
 615  * Make a dupplicate of a SafeArray
 616  */
 617 HRESULT WINAPI SafeArrayCopy(
 618   SAFEARRAY *psa,
 619   SAFEARRAY **ppsaOut)
 620 {
 621   HRESULT hRes;
 622   DWORD   dAllocSize;
 623
 624   if(! validArg(psa))
 625     return E_INVALIDARG;
 626
 627   if((hRes=SafeArrayAllocDescriptor(psa->cDims, ppsaOut)) == S_OK){
 628
 629     /* Duplicate the SAFEARRAY struc */
 630     memcpy(*ppsaOut, psa,
 631             sizeof(*psa)+(sizeof(*(psa->rgsabound))*(psa->cDims-1)));
 632
 633     (*ppsaOut)->pvData = NULL; /* do not point to the same data area */
 634
 635     /* Get the allocated memory size for source and allocate it for target */
 636     dAllocSize = HeapSize(GetProcessHeap(), 0, psa->pvData);
 637     (*ppsaOut)->pvData =
 638       HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, dAllocSize);
 639
 640     if( (*ppsaOut)->pvData != NULL) {   /* HeapAlloc succeed */
 641
 642       if( (hRes=duplicateData(psa, ppsaOut)) != S_OK) { /* E_OUTOFMEMORY */
 643         HeapFree(GetProcessHeap(), 0, (*ppsaOut)->pvData);
 644         (*ppsaOut)->pvData = NULL;
 645         SafeArrayDestroyDescriptor(*ppsaOut);
 646         return hRes;
 647       }
 648
 649     } else { /* failed to allocate or dupplicate... */
 650       SafeArrayDestroyDescriptor(*ppsaOut);
 651       return E_UNEXPECTED; /* UNDOC error condition */
 652     }
 653   } else { /* failed to allocate mem for descriptor */
 654     return E_OUTOFMEMORY; /* UNDOC error condiftion */
 655   }
 656
 657   return S_OK;
 658 }
 659
 660 /************************************************************************
 661  * Creates a one dimension safearray where the data is next to the
 662  * SAFEARRAY structure.
 663  */
 664 SAFEARRAY* WINAPI SafeArrayCreateVector(
 665   VARTYPE vt,
 666   LONG    lLbound,
 667   ULONG   cElements)
 668 {
 669   SAFEARRAY *psa;
 670
 671   /* Validate supported VARTYPE */
 672   if ( (vt >= LAST_VARTYPE) ||
 673        ( VARTYPE_SIZE[vt] == VARTYPE_NOT_SUPPORTED ) )
 674     return NULL;
 675
 676   /* Allocate memory for the array descriptor and data contiguously  */
 677   if( FAILED( psa = HeapAlloc( GetProcessHeap(),
 678                       HEAP_ZERO_MEMORY,
 679                       (sizeof(*psa) + (VARTYPE_SIZE[vt] * cElements))))) {
 680     return NULL;
 681   }
 682
 683   /* setup data members... */
 684   psa->cDims      = 1; /* always and forever */
 685   psa->fFeatures  = getFeatures(vt) | FADF_FIXEDSIZE;
 686   psa->cLocks     = 0;
 687   psa->pvData     = psa+sizeof(*psa);
 688   psa->cbElements = VARTYPE_SIZE[vt];
 689
 690   psa->rgsabound[0].cElements = cElements;
 691   psa->rgsabound[0].lLbound   = lLbound;
 692
 693   return(psa);
 694 }
 695
 696 /************************************************************************
 697  * Changes the caracteristics of the last dimension of the SafeArray
 698  */
 699 HRESULT WINAPI SafeArrayRedim(
 700   SAFEARRAY      *psa,
 701   SAFEARRAYBOUND *psaboundNew)
 702 {
 703   LONG   lDelta;  /* hold difference in size */
 704   USHORT cDims=1; /* dims counter */
 705
 706   if( !validArg(psa) )
 707     return E_INVALIDARG;
 708
 709   if( psa->cLocks > 0 )
 710     return DISP_E_ARRAYISLOCKED;
 711
 712   if( psa->fFeatures & FADF_FIXEDSIZE )
 713     return E_INVALIDARG;
 714
 715   if( SafeArrayLock(psa)==E_UNEXPECTED )
 716     return E_UNEXPECTED;/* UNDOC error condition */
 717
 718   /* find the delta in number of array spot to apply to the new array */
 719   lDelta = psaboundNew->cElements - psa->rgsabound[0].cElements;
 720   for(; cDims < psa->cDims; cDims++)
 721     /* delta in number of spot implied by modifying the last dimension */
 722     lDelta *= psa->rgsabound[cDims].cElements;
 723
 724   if (lDelta == 0) { ;/* same size, maybe a change of lLbound, just set it */
 725
 726   } else /* need to enlarge (lDelta +) reduce (lDelta -) */
 727     if(! resizeSafeArray(psa, lDelta))
 728       return E_UNEXPECTED; /* UNDOC error condition */
 729
 730   /* the only modifyable dimension sits in [0] as the dimensions were reversed
 731      at array creation time... */
 732   psa->rgsabound[0].cElements = psaboundNew->cElements;
 733   psa->rgsabound[0].lLbound   = psaboundNew->lLbound;
 734
 735   return SafeArrayUnlock(psa);
 736 }
 737
 738 /************************************************************************
 739  * NOT WINDOWS API - SafeArray* Utility functions
 740  ************************************************************************/
 741
 742 /************************************************************************
 743  * Used to validate the SAFEARRAY type of arg
 744  */
 745 static BOOL validArg(
 746   SAFEARRAY *psa)
 747 {
 748   SAFEARRAYBOUND *sab;
 749   LONG psaSize  = 0;
 750   LONG descSize = 0;
 751   LONG fullSize = 0;
 752
 753   /*
 754    * Let's check for the null pointer just in case.
 755    */
 756   if (psa == NULL)
 757     return FALSE;
 758
 759   /* Check whether the size of the chunk make sens... That's the only thing
 760      I can think of now... */
 761
 762   psaSize   = HeapSize(GetProcessHeap(), 0, psa);
 763
 764   /* size of the descriptor when the SA is not created with CreateVector */
 765   descSize = sizeof(*psa) + (sizeof(*sab) * (psa->cDims-1));
 766
 767   /* size of the descriptor + data when created with CreateVector */
 768   fullSize = sizeof(*psa) + (psa->cbElements * psa->rgsabound[0].cElements);
 769
 770   return((psaSize >= descSize) || (psaSize >= fullSize));
 771 }
 772
 773 /************************************************************************
 774  * Used to reallocate memory
 775  */
 776 static BOOL resizeSafeArray(
 777   SAFEARRAY *psa,
 778   LONG lDelta)
 779 {
 780   ULONG    ulWholeArraySize;  /* use as multiplicator */
 781   PVOID    pvNewBlock = NULL;
 782   IUnknown *punk;
 783   BSTR   bstr;
 784
 785   ulWholeArraySize = getArraySize(psa);
 786
 787   if(lDelta < 0) {                    /* array needs to be shorthen  */
 788     if( isPointer(psa->fFeatures))    /* ptr that need to be released */
 789             for(;lDelta < 0; lDelta++) {
 790               punk = *(IUnknown**)
 791           ((char *) psa->pvData+((ulWholeArraySize+lDelta)*psa->cbElements));
 792
 793         if( punk != NULL )
 794           IUnknown_Release(punk);
 795             }
 796
 797     else if(psa->fFeatures & FADF_BSTR)  /* BSTR that need to be freed */
 798             for(;lDelta < 0; lDelta++) {
 799         bstr = *(BSTR*)
 800           ((char *) psa->pvData+((ulWholeArraySize+lDelta)*psa->cbElements));
 801
 802         if( bstr != NULL )
 803           SysFreeString( bstr );
 804       }
 805   }
 806
 807   /* Ok now, if we are enlarging the array, we *MUST* move the whole block
 808      pointed to by pvData.   If we are shorthening the array, this move is
 809      optional but we do it anyway becuase the benefit is that we are
 810      releasing to the system the unused memory */
 811
 812   if((pvNewBlock = HeapReAlloc(GetProcessHeap(), 0, psa->pvData,
 813      (ulWholeArraySize + lDelta) * psa->cbElements)) == NULL)
 814       return FALSE; /* TODO If we get here it means:
 815                        SHRINK situation :  we've deleted the undesired
 816                                            data and did not release the memory
 817                        GROWING situation:  we've been unable to grow the array
 818                     */
 819
 820   /* reassign to the new block of data */
 821   psa->pvData = pvNewBlock;
 822   return TRUE;
 823 }
 824
 825 /************************************************************************
 826  * Used to set the fFeatures data member of the SAFEARRAY structure.
 827  */
 828 static INT getFeatures(
 829   VARTYPE vt)
 830 {
 831   switch(vt) {
 832     case VT_UNKNOWN:   return FADF_UNKNOWN;
 833     case VT_DISPATCH:  return FADF_DISPATCH;
 834     case VT_BSTR:      return FADF_BSTR;
 835   }
 836   return 0;
 837 }
 838
 839 /************************************************************************
 840  * Used to figure out if the fFeatures data member of the SAFEARRAY
 841  * structure contain any information about the type of data stored...
 842  */
 843 static BOOL isPointer(
 844   USHORT feature)
 845 {
 846   switch(feature) {
 847     case FADF_UNKNOWN:  return TRUE; /* those are pointers */
 848     case FADF_DISPATCH: return TRUE;
 849   }
 850   return FALSE;
 851 }
 852
 853 /************************************************************************
 854  * Used to calculate the displacement when accessing or modifying
 855  * safearray data set.
 856  *
 857  *  Parameters: - LONG *coor is the desired location in the multidimension
 858  *              table.  Ex for a 3 dim table: coor[] = {1,2,3};
 859  *              - ULONG *mat is the format of the table.  Ex for a 3 dim
 860  *              table mat[] = {4,4,4};
 861  *              - USHORT dim is the number of dimension of the SafeArray
 862  */
 863 static ULONG calcDisplacement(
 864   LONG           *coor,
 865   SAFEARRAYBOUND *mat,
 866   LONG           dim)
 867 {
 868   ULONG res = 0;
 869   LONG  iterDim;
 870
 871   for(iterDim=0; iterDim<dim; iterDim++)
 872     /* the -mat[dim] bring coor[dim] relative to 0 for calculation */
 873     res += ((coor[iterDim]-mat[iterDim].lLbound) *
 874             endOfDim(coor, mat, iterDim+1, dim));
 875
 876   TRACE("SafeArray: calculated displacement is %lu.\n", res);
 877   return(res);
 878 }
 879
 880 /************************************************************************
 881  * Recursivity agent for calcDisplacement method.  Used within Put and
 882  * Get methods.
 883  */
 884 static INT endOfDim(
 885   LONG           *coor,
 886   SAFEARRAYBOUND *mat,
 887   LONG           dim,
 888   LONG           realDim)
 889 {
 890   if(dim==realDim)
 891     return 1;
 892   else
 893     return (endOfDim(coor, mat, dim+1, realDim) * mat[dim].cElements);
 894 }
 895
 896
 897 /************************************************************************
 898  * Method used to validate the coordinate received in Put and Get
 899  * methods.
 900  */
 901 static BOOL validCoordinate(
 902   LONG      *coor,
 903   SAFEARRAY *psa)
 904 {
 905   INT   iter=0;
 906   LONG    lUBound;
 907   LONG    lLBound;
 908   HRESULT hRes;
 909
 910   for(; iter<psa->cDims; iter++) {
 911     if((hRes = SafeArrayGetLBound(psa, iter, &lLBound)) != S_OK)
 912       return FALSE;
 913     if((hRes = SafeArrayGetUBound(psa, iter, &lUBound)) != S_OK)
 914       return FALSE;
 915
 916     if(lLBound == lUBound)
 917       return FALSE;
 918
 919     if((coor[iter] >= lLBound) && (coor[iter] <= lUBound))
 920       return TRUE;
 921     else
 922       return FALSE;
 923   }
 924   return FALSE;
 925 }
 926
 927 /************************************************************************
 928  * Method used to calculate the number of cells of the SA
 929  */
 930 static ULONG getArraySize(
 931   SAFEARRAY *psa)
 932 {
 933   USHORT cCount;
 934   ULONG  ulWholeArraySize = 1;
 935
 936   for(cCount=0; cCount < psa->cDims; cCount++) /* foreach dimensions... */
 937     ulWholeArraySize *= psa->rgsabound[cCount].cElements;
 938
 939   return ulWholeArraySize;
 940 }
 941
 942
 943 /************************************************************************
 944  * Method used to handle data space dupplication for Copy32 and CopyData32
 945  */
 946 static HRESULT duplicateData(
 947   SAFEARRAY *psa,
 948   SAFEARRAY **ppsaOut)
 949 {
 950   ULONG    ulWholeArraySize; /* size of the thing */
 951   LONG     lDelta;
 952   IUnknown *punk;
 953   BSTR   pbstrReAllocStr = NULL; /* BSTR reallocated */
 954
 955   ulWholeArraySize = getArraySize(psa); /* Number of item in SA */
 956
 957   SafeArrayLock(*ppsaOut);
 958
 959   if( isPointer(psa->fFeatures) ) {  /* If datatype is object increment
 960                                         object's reference count */
 961
 962     for(lDelta=0; lDelta < ulWholeArraySize; lDelta++) {
 963       punk = *(IUnknown**)((char *) psa->pvData+(lDelta * psa->cbElements));
 964
 965       if( punk != NULL)
 966         IUnknown_AddRef(punk);
 967     }
 968
 969     /* Copy the source array data into target array */
 970     memcpy((*ppsaOut)->pvData, psa->pvData,
 971       ulWholeArraySize*psa->cbElements);
 972
 973   } else if( psa->fFeatures & FADF_BSTR ) { /* if datatype is BSTR allocate
 974                                                the BSTR in the new array */
 975
 976     for(lDelta=0; lDelta < ulWholeArraySize; lDelta++) {
 977       if(( pbstrReAllocStr = SysAllocString(
 978             *(BSTR*)((char *) psa->pvData+(lDelta * psa->cbElements)))) == NULL) {
 979
 980         SafeArrayUnlock(*ppsaOut);
 981         return E_OUTOFMEMORY;
 982       }
 983
 984       *((BSTR*)((char *) (*ppsaOut)->pvData+(lDelta * psa->cbElements))) =
 985         pbstrReAllocStr;
 986     }
 987
 988   } else { /* Simply copy the source array data into target array */
 989
 990     memcpy((*ppsaOut)->pvData, psa->pvData,
 991       ulWholeArraySize*psa->cbElements);
 992   }
 993
 994   SafeArrayUnlock(*ppsaOut);
 995
 996   return S_OK;
 997 }
 998