1 // Windows/PropVariant.cpp

     2 

     3 #include "StdAfx.h"

     4 

     5 #include "PropVariant.h"

     6 

     7 #include "../Common/Defs.h"

     8 

     9 namespace NWindows {

    10 namespace NCOM {

    11 

    12 CPropVariant::CPropVariant(const PROPVARIANT& varSrc)

    13 {

    14   vt = VT_EMPTY;

    15   InternalCopy(&varSrc);

    16 }

    17 

    18 CPropVariant::CPropVariant(const CPropVariant& varSrc)

    19 {

    20   vt = VT_EMPTY;

    21   InternalCopy(&varSrc);

    22 }

    23 

    24 CPropVariant::CPropVariant(BSTR bstrSrc)

    25 {

    26   vt = VT_EMPTY;

    27   *this = bstrSrc;

    28 }

    29 

    30 CPropVariant::CPropVariant(LPCOLESTR lpszSrc)

    31 {

    32   vt = VT_EMPTY;

    33   *this = lpszSrc;

    34 }

    35 

    36 CPropVariant& CPropVariant::operator=(const CPropVariant& varSrc)

    37 {

    38   InternalCopy(&varSrc);

    39   return *this;

    40 }

    41 CPropVariant& CPropVariant::operator=(const PROPVARIANT& varSrc)

    42 {

    43   InternalCopy(&varSrc);

    44   return *this;

    45 }

    46 

    47 CPropVariant& CPropVariant::operator=(BSTR bstrSrc)

    48 {

    49   *this = (LPCOLESTR)bstrSrc;

    50   return *this;

    51 }

    52 

    53 CPropVariant& CPropVariant::operator=(LPCOLESTR lpszSrc)

    54 {

    55   InternalClear();

    56   vt = VT_BSTR;

    57   wReserved1 = 0;

    58   bstrVal = ::SysAllocString(lpszSrc);

    59   if (bstrVal == NULL && lpszSrc != NULL)

    60   {

    61     vt = VT_ERROR;

    62     scode = E_OUTOFMEMORY;

    63   }

    64   return *this;

    65 }

    66 

    67 

    68 CPropVariant& CPropVariant::operator=(bool bSrc)

    69 {

    70   if (vt != VT_BOOL)

    71   {

    72     InternalClear();

    73     vt = VT_BOOL;

    74   }

    75   boolVal = bSrc ? VARIANT_TRUE : VARIANT_FALSE;

    76   return *this;

    77 }

    78 

    79 CPropVariant& CPropVariant::operator=(UInt32 value)

    80 {

    81   if (vt != VT_UI4)

    82   {

    83     InternalClear();

    84     vt = VT_UI4;

    85   }

    86   ulVal = value;

    87   return *this;

    88 }

    89 

    90 CPropVariant& CPropVariant::operator=(UInt64 value)

    91 {

    92   if (vt != VT_UI8)

    93   {

    94     InternalClear();

    95     vt = VT_UI8;

    96   }

    97   uhVal.QuadPart = value;

    98   return *this;

    99 }

   100 

   101 CPropVariant& CPropVariant::operator=(const FILETIME &value)

   102 {

   103   if (vt != VT_FILETIME)

   104   {

   105     InternalClear();

   106     vt = VT_FILETIME;

   107   }

   108   filetime = value;

   109   return *this;

   110 }

   111 

   112 CPropVariant& CPropVariant::operator=(Int32 value)

   113 {

   114   if (vt != VT_I4)

   115   {

   116     InternalClear();

   117     vt = VT_I4;

   118   }

   119   lVal = value;

   120   

   121   return *this;

   122 }

   123 

   124 CPropVariant& CPropVariant::operator=(Byte value)

   125 {

   126   if (vt != VT_UI1)

   127   {

   128     InternalClear();

   129     vt = VT_UI1;

   130   }

   131   bVal = value;

   132   return *this;

   133 }

   134 

   135 CPropVariant& CPropVariant::operator=(Int16 value)

   136 {

   137   if (vt != VT_I2)

   138   {

   139     InternalClear();

   140     vt = VT_I2;

   141   }

   142   iVal = value;

   143   return *this;

   144 }

   145 

   146 /*

   147 CPropVariant& CPropVariant::operator=(LONG value)

   148 {

   149   if (vt != VT_I4)

   150   {

   151     InternalClear();

   152     vt = VT_I4;

   153   }

   154   lVal = value;

   155   return *this;

   156 }

   157 */

   158 

   159 static HRESULT MyPropVariantClear(PROPVARIANT *propVariant) 

   160 { 

   161   switch(propVariant->vt)

   162   {

   163     case VT_UI1:

   164     case VT_I1:

   165     case VT_I2:

   166     case VT_UI2:

   167     case VT_BOOL:

   168     case VT_I4:

   169     case VT_UI4:

   170     case VT_R4:

   171     case VT_INT:

   172     case VT_UINT:

   173     case VT_ERROR:

   174     case VT_FILETIME:

   175     case VT_UI8:

   176     case VT_R8:

   177     case VT_CY:

   178     case VT_DATE:

   179       propVariant->vt = VT_EMPTY;

   180       propVariant->wReserved1 = 0; 

   181       return S_OK;

   182   }

   183   return ::VariantClear((VARIANTARG *)propVariant); 

   184 }

   185 

   186 HRESULT CPropVariant::Clear() 

   187 { 

   188   return MyPropVariantClear(this);

   189 }

   190 

   191 HRESULT CPropVariant::Copy(const PROPVARIANT* pSrc) 

   192 { 

   193   ::VariantClear((tagVARIANT *)this); 

   194   switch(pSrc->vt)

   195   {

   196     case VT_UI1:

   197     case VT_I1:

   198     case VT_I2:

   199     case VT_UI2:

   200     case VT_BOOL:

   201     case VT_I4:

   202     case VT_UI4:

   203     case VT_R4:

   204     case VT_INT:

   205     case VT_UINT:

   206     case VT_ERROR:

   207     case VT_FILETIME:

   208     case VT_UI8:

   209     case VT_R8:

   210     case VT_CY:

   211     case VT_DATE:

   212       memmove((PROPVARIANT*)this, pSrc, sizeof(PROPVARIANT));

   213       return S_OK;

   214   }

   215   return ::VariantCopy((tagVARIANT *)this, (tagVARIANT *)(pSrc)); 

   216 }

   217 

   218 

   219 HRESULT CPropVariant::Attach(PROPVARIANT* pSrc)

   220 {

   221   HRESULT hr = Clear();

   222   if (FAILED(hr))

   223     return hr;

   224   memcpy(this, pSrc, sizeof(PROPVARIANT));

   225   pSrc->vt = VT_EMPTY;

   226   return S_OK;

   227 }

   228 

   229 HRESULT CPropVariant::Detach(PROPVARIANT* pDest)

   230 {

   231   HRESULT hr = MyPropVariantClear(pDest);

   232   if (FAILED(hr))

   233     return hr;

   234   memcpy(pDest, this, sizeof(PROPVARIANT));

   235   vt = VT_EMPTY;

   236   return S_OK;

   237 }

   238 

   239 HRESULT CPropVariant::InternalClear()

   240 {

   241   HRESULT hr = Clear();

   242   if (FAILED(hr))

   243   {

   244     vt = VT_ERROR;

   245     scode = hr;

   246   }

   247   return hr;

   248 }

   249 

   250 void CPropVariant::InternalCopy(const PROPVARIANT* pSrc)

   251 {

   252   HRESULT hr = Copy(pSrc);

   253   if (FAILED(hr))

   254   {

   255     vt = VT_ERROR;

   256     scode = hr;

   257   }

   258 }

   259 

   260 int CPropVariant::Compare(const CPropVariant &a)

   261 {

   262   if(vt != a.vt)

   263     return 0; // it's mean some bug

   264   switch (vt)

   265   {

   266     case VT_EMPTY:

   267       return 0;

   268     

   269     /*

   270     case VT_I1:

   271       return MyCompare(cVal, a.cVal);

   272     */

   273     case VT_UI1:

   274       return MyCompare(bVal, a.bVal);

   275 

   276     case VT_I2:

   277       return MyCompare(iVal, a.iVal);

   278     case VT_UI2:

   279       return MyCompare(uiVal, a.uiVal);

   280     

   281     case VT_I4:

   282       return MyCompare(lVal, a.lVal);

   283     /*

   284     case VT_INT:

   285       return MyCompare(intVal, a.intVal);

   286     */

   287     case VT_UI4:

   288       return MyCompare(ulVal, a.ulVal);

   289     /*

   290     case VT_UINT:

   291       return MyCompare(uintVal, a.uintVal);

   292     */

   293     case VT_I8:

   294       return MyCompare(hVal.QuadPart, a.hVal.QuadPart);

   295     case VT_UI8:

   296       return MyCompare(uhVal.QuadPart, a.uhVal.QuadPart);

   297 

   298     case VT_BOOL:    

   299       return -MyCompare(boolVal, a.boolVal);

   300 

   301     case VT_FILETIME:

   302       return ::CompareFileTime(&filetime, &a.filetime);

   303     case VT_BSTR:

   304       return 0; // Not implemented 

   305       // return MyCompare(aPropVarint.cVal);

   306 

   307     default:

   308       return 0;

   309   }

   310 }

   311 

   312 }}