src/msw/ole/uuid.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/ole/uuid.cpp
   3 // Purpose:     implements Uuid class, see uuid.h for details
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     12.09.96
   7 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // Declarations
  13 // ============================================================================
  14
  15 // For compilers that support precompilation, includes "wx.h".
  16 #include "wx/wxprec.h"
  17
  18 #if defined(__BORLANDC__)
  19 #pragma hdrstop
  20 #endif
  21
  22 #if wxUSE_OLE && (wxUSE_DRAG_AND_DROP || wxUSE_DATAOBJ)
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/msw/wrapwin.h"
  26 #endif
  27
  28 #include  <rpc.h>                       // UUID related functions
  29
  30 #include  "wx/msw/ole/uuid.h"
  31
  32
  33
  34 // ============================================================================
  35 // Implementation
  36 // ============================================================================
  37
  38 // length of UUID in C format
  39 #define   UUID_CSTRLEN  100     // real length is 66
  40
  41 // copy ctor
  42 Uuid::Uuid(const Uuid& uuid)
  43 {
  44   // bitwise copy Ok for UUIDs
  45   m_uuid = uuid.m_uuid;
  46
  47   // force the string to be allocated by RPC
  48   // (we free it later with RpcStringFree)
  49 #ifdef _UNICODE
  50   UuidToString(&m_uuid, (unsigned short **)&m_pszUuid);
  51 #else
  52   UuidToString(&m_uuid, &m_pszUuid);
  53 #endif
  54
  55   // allocate new buffer
  56   m_pszCForm = new wxChar[UUID_CSTRLEN];
  57   // and fill it
  58   memcpy(m_pszCForm, uuid.m_pszCForm, UUID_CSTRLEN*sizeof(wxChar));
  59 }
  60
  61 // assignment operator
  62 Uuid& Uuid::operator=(const Uuid& uuid)
  63 {
  64   m_uuid = uuid.m_uuid;
  65
  66   // force the string to be allocated by RPC
  67   // (we free it later with RpcStringFree)
  68 #ifdef _UNICODE
  69   UuidToString(&m_uuid, (unsigned short **)&m_pszUuid);
  70 #else
  71   UuidToString(&m_uuid, &m_pszUuid);
  72 #endif
  73
  74   // allocate new buffer if not done yet
  75   if ( !m_pszCForm )
  76     m_pszCForm = new wxChar[UUID_CSTRLEN];
  77
  78   // and fill it
  79   memcpy(m_pszCForm, uuid.m_pszCForm, UUID_CSTRLEN*sizeof(wxChar));
  80
  81   return *this;
  82 }
  83
  84 bool Uuid::operator==(const Uuid& uuid) const
  85 {
  86     // IsEqualGUID() returns BOOL and not bool so use an explicit comparison to
  87     // avoid MSVC warnings about int->bool conversion
  88     return IsEqualGUID(m_uuid, uuid.m_uuid) != 0;
  89 }
  90
  91 // dtor
  92 Uuid::~Uuid()
  93 {
  94   // this string must be allocated by RPC!
  95   // (otherwise you get a debug breakpoint deep inside RPC DLL)
  96   if ( m_pszUuid )
  97 #ifdef _UNICODE
  98     RpcStringFree((unsigned short **)&m_pszUuid);
  99 #else
 100     RpcStringFree(&m_pszUuid);
 101 #endif
 102
 103   // perhaps we should just use a static buffer and not bother
 104   // with new and delete?
 105   if ( m_pszCForm )
 106     delete [] m_pszCForm;
 107 }
 108
 109 // update string representation of new UUID
 110 void Uuid::Set(const UUID &uuid)
 111 {
 112   m_uuid = uuid;
 113
 114   // get string representation
 115 #ifdef _UNICODE
 116   UuidToString(&m_uuid, (unsigned short **)&m_pszUuid);
 117 #else
 118   UuidToString(&m_uuid, &m_pszUuid);
 119 #endif
 120
 121   // cache UUID in C format
 122   UuidToCForm();
 123 }
 124
 125 // create a new UUID
 126 void Uuid::Create()
 127 {
 128   UUID uuid;
 129
 130   // can't fail
 131   UuidCreate(&uuid);
 132
 133   Set(uuid);
 134 }
 135
 136 // set the value
 137 bool Uuid::Set(const wxChar *pc)
 138 {
 139   // get UUID from string
 140 #ifdef _UNICODE
 141   if ( UuidFromString((unsigned short *)pc, &m_uuid) != RPC_S_OK)
 142 #else
 143   if ( UuidFromString((wxUChar *)pc, &m_uuid) != RPC_S_OK)
 144 #endif
 145     // failed: probably invalid string
 146     return false;
 147
 148   // transform it back to string to normalize it
 149 #ifdef _UNICODE
 150   UuidToString(&m_uuid, (unsigned short **)&m_pszUuid);
 151 #else
 152   UuidToString(&m_uuid, &m_pszUuid);
 153 #endif
 154
 155   // update m_pszCForm
 156   UuidToCForm();
 157
 158   return true;
 159 }
 160
 161 // stores m_uuid in m_pszCForm in a format required by
 162 // DEFINE_GUID macro: i.e. something like
 163 //  0x7D8A2281L,0x4C61,0x11D0,0xBA,0xBD,0x00,0x00,0xC0,0x18,0xBA,0x27
 164 // m_pszUuid is of the form (no, it's not quite the same UUID :-)
 165 //  6aadc650-67b0-11d0-bac8-0000c018ba27
 166 void Uuid::UuidToCForm()
 167 {
 168   if ( m_pszCForm == NULL )
 169     m_pszCForm = new wxChar[UUID_CSTRLEN];
 170
 171   wsprintf(m_pszCForm, wxT("0x%8.8X,0x%4.4X,0x%4.4X,0x%2.2X,0x2.2%X,0x2.2%X,0x2.2%X,0x2.2%X,0x2.2%X,0x2.2%X,0x2.2%X"),
 172            m_uuid.Data1, m_uuid.Data2, m_uuid.Data3,
 173            m_uuid.Data4[0], m_uuid.Data4[1], m_uuid.Data4[2], m_uuid.Data4[3],
 174            m_uuid.Data4[4], m_uuid.Data4[5], m_uuid.Data4[6], m_uuid.Data4[7]);
 175 }
 176
 177 #endif
 178   // wxUSE_DRAG_AND_DROP