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