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   UuidToString(&m_uuid, &m_pszUuid);
  54
  55   // allocate new buffer
  56   m_pszCForm = new char[UUID_CSTRLEN];
  57   // and fill it
  58   memcpy(m_pszCForm, uuid.m_pszCForm, UUID_CSTRLEN);
  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   UuidToString(&m_uuid, &m_pszUuid);
  69
  70   // allocate new buffer if not done yet
  71   if ( !m_pszCForm )
  72     m_pszCForm = new char[UUID_CSTRLEN];
  73
  74   // and fill it
  75   memcpy(m_pszCForm, uuid.m_pszCForm, UUID_CSTRLEN);
  76
  77   return *this;
  78 }
  79
  80 // dtor
  81 Uuid::~Uuid()
  82 {
  83   // this string must be allocated by RPC!
  84   // (otherwise you get a debug breakpoint deep inside RPC DLL)
  85   if ( m_pszUuid )
  86     RpcStringFree(&m_pszUuid);
  87
  88   // perhaps we should just use a static buffer and not bother
  89   // with new and delete?
  90   if ( m_pszCForm )
  91     delete [] m_pszCForm;
  92 }
  93
  94 // update string representation of new UUID
  95 void Uuid::Set(const UUID &uuid)
  96 {
  97   m_uuid = uuid;
  98
  99   // get string representation
 100   UuidToString(&m_uuid, &m_pszUuid);
 101
 102   // cache UUID in C format
 103   UuidToCForm();
 104 }
 105
 106 // create a new UUID
 107 void Uuid::Create()
 108 {
 109   UUID uuid;
 110
 111   // can't fail
 112   UuidCreate(&uuid);
 113
 114   Set(uuid);
 115 }
 116
 117 // set the value
 118 bool Uuid::Set(const char *pc)
 119 {
 120   // get UUID from string
 121   if ( UuidFromString((uchar *)pc, &m_uuid) != RPC_S_OK)
 122     // failed: probably invalid string
 123     return FALSE;
 124
 125   // transform it back to string to normalize it
 126   UuidToString(&m_uuid, &m_pszUuid);
 127
 128   // update m_pszCForm
 129   UuidToCForm();
 130
 131   return TRUE;
 132 }
 133
 134 // stores m_uuid in m_pszCForm in a format required by
 135 // DEFINE_GUID macro: i.e. something like
 136 //  0x7D8A2281L,0x4C61,0x11D0,0xBA,0xBD,0x00,0x00,0xC0,0x18,0xBA,0x27
 137 // m_pszUuid is of the form (no, it's not quite the same UUID :-)
 138 //  6aadc650-67b0-11d0-bac8-0000c018ba27
 139 void Uuid::UuidToCForm()
 140 {
 141   if ( m_pszCForm == NULL )
 142     m_pszCForm = new char[UUID_CSTRLEN];
 143
 144   wsprintf(m_pszCForm, "0x%8.8X,0x%4.4X,0x%4.4X,0x%2.2X,0x2.2%X,"
 145            "0x2.2%X,0x2.2%X,0x2.2%X,0x2.2%X,0x2.2%X,0x2.2%X",
 146            m_uuid.Data1, m_uuid.Data2, m_uuid.Data3,
 147            m_uuid.Data4[1], m_uuid.Data4[2], m_uuid.Data4[3], m_uuid.Data4[4],
 148            m_uuid.Data4[5], m_uuid.Data4[6], m_uuid.Data4[7], m_uuid.Data4[8]);
 149 }
 150
 151 #endif
 152   // wxUSE_DRAG_AND_DROP