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      1 // Windows/PropVariant.h
      2 
      3 #ifndef __WINDOWS_PROP_VARIANT_H
      4 #define __WINDOWS_PROP_VARIANT_H
      5 
      6 #include "../Common/MyTypes.h"
      7 #include "../Common/MyWindows.h"
      8 #include "../Common/MyString.h"
      9 
     10 namespace NWindows {
     11 namespace NCOM {
     12 
     13 BSTR AllocBstrFromAscii(const char *s) throw();
     14 
     15 HRESULT PropVariant_Clear(PROPVARIANT *p) throw();
     16 
     17 HRESULT PropVarEm_Alloc_Bstr(PROPVARIANT *p, unsigned numChars) throw();
     18 HRESULT PropVarEm_Set_Str(PROPVARIANT *p, const char *s) throw();
     19 
     20 inline void PropVarEm_Set_UInt32(PROPVARIANT *p, UInt32 v) throw()
     21 {
     22   p->vt = VT_UI4;
     23   p->ulVal = v;
     24 }
     25 
     26 inline void PropVarEm_Set_UInt64(PROPVARIANT *p, UInt64 v) throw()
     27 {
     28   p->vt = VT_UI8;
     29   p->uhVal.QuadPart = v;
     30 }
     31 
     32 inline void PropVarEm_Set_FileTime64(PROPVARIANT *p, UInt64 v) throw()
     33 {
     34   p->vt = VT_FILETIME;
     35   p->filetime.dwLowDateTime = (DWORD)v;
     36   p->filetime.dwHighDateTime = (DWORD)(v >> 32);
     37 }
     38 
     39 inline void PropVarEm_Set_Bool(PROPVARIANT *p, bool b) throw()
     40 {
     41   p->vt = VT_BOOL;
     42   p->boolVal = (b ? VARIANT_TRUE : VARIANT_FALSE);
     43 }
     44 
     45 
     46 class CPropVariant : public tagPROPVARIANT
     47 {
     48 public:
     49   CPropVariant()
     50   {
     51     vt = VT_EMPTY;
     52     wReserved1 = 0;
     53     // wReserved2 = 0;
     54     // wReserved3 = 0;
     55     // uhVal.QuadPart = 0;
     56     bstrVal = 0;
     57   }
     58   ~CPropVariant() throw() { Clear(); }
     59   CPropVariant(const PROPVARIANT &varSrc);
     60   CPropVariant(const CPropVariant &varSrc);
     61   CPropVariant(BSTR bstrSrc);
     62   CPropVariant(LPCOLESTR lpszSrc);
     63   CPropVariant(bool bSrc) { vt = VT_BOOL; wReserved1 = 0; boolVal = (bSrc ? VARIANT_TRUE : VARIANT_FALSE); }
     64   CPropVariant(Byte value) { vt = VT_UI1; wReserved1 = 0; bVal = value; }
     65 
     66 private:
     67   CPropVariant(Int16 value); // { vt = VT_I2; wReserved1 = 0; iVal = value; }
     68   CPropVariant(Int32 value); // { vt = VT_I4; wReserved1 = 0; lVal = value; }
     69 
     70 public:
     71   CPropVariant(UInt32 value) { vt = VT_UI4; wReserved1 = 0; ulVal = value; }
     72   CPropVariant(UInt64 value) { vt = VT_UI8; wReserved1 = 0; uhVal.QuadPart = value; }
     73   CPropVariant(Int64 value) { vt = VT_I8; wReserved1 = 0; hVal.QuadPart = value; }
     74   CPropVariant(const FILETIME &value) { vt = VT_FILETIME; wReserved1 = 0; filetime = value; }
     75 
     76   CPropVariant& operator=(const CPropVariant &varSrc);
     77   CPropVariant& operator=(const PROPVARIANT &varSrc);
     78   CPropVariant& operator=(BSTR bstrSrc);
     79   CPropVariant& operator=(LPCOLESTR lpszSrc);
     80   CPropVariant& operator=(const UString &s);
     81   CPropVariant& operator=(const UString2 &s);
     82   CPropVariant& operator=(const char *s);
     83   CPropVariant& operator=(const AString &s)
     84     { return (*this)=(const char *)s; }
     85 
     86   CPropVariant& operator=(bool bSrc) throw();
     87   CPropVariant& operator=(Byte value) throw();
     88 
     89 private:
     90   CPropVariant& operator=(Int16 value) throw();
     91 
     92 public:
     93   CPropVariant& operator=(Int32 value) throw();
     94   CPropVariant& operator=(UInt32 value) throw();
     95   CPropVariant& operator=(UInt64 value) throw();
     96   CPropVariant& operator=(Int64 value) throw();
     97   CPropVariant& operator=(const FILETIME &value) throw();
     98 
     99   BSTR AllocBstr(unsigned numChars);
    100 
    101   HRESULT Clear() throw();
    102   HRESULT Copy(const PROPVARIANT *pSrc) throw();
    103   HRESULT Attach(PROPVARIANT *pSrc) throw();
    104   HRESULT Detach(PROPVARIANT *pDest) throw();
    105 
    106   HRESULT InternalClear() throw();
    107   void InternalCopy(const PROPVARIANT *pSrc);
    108 
    109   int Compare(const CPropVariant &a) throw();
    110 };
    111 
    112 }}
    113 
    114 #endif
    115