src/msw/ole/uuid.cpp

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