src/common/ipcbase.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/ipcbase.cpp
   3 // Purpose:     IPC base classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // Copyright:   (c) Julian Smart
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #ifndef WX_PRECOMP
  19 #endif
  20
  21 #include "wx/ipcbase.h"
  22
  23 wxIMPLEMENT_ABSTRACT_CLASS(wxServerBase, wxObject)
  24 wxIMPLEMENT_ABSTRACT_CLASS(wxClientBase, wxObject)
  25 wxIMPLEMENT_ABSTRACT_CLASS(wxConnectionBase, wxObject)
  26
  27 wxConnectionBase::wxConnectionBase(void *buffer, size_t bytes)
  28     : m_buffer((char *)buffer),
  29       m_buffersize(bytes),
  30       m_deletebufferwhendone(false),
  31       m_connected(true)
  32 {
  33   if ( buffer == NULL )
  34   { // behave like next constructor
  35     m_buffersize = 0;
  36     m_deletebufferwhendone = true;
  37   }
  38 }
  39
  40 wxConnectionBase::wxConnectionBase()
  41     : m_buffer(NULL),
  42       m_buffersize(0),
  43       m_deletebufferwhendone(true),
  44       m_connected(true)
  45 {
  46 }
  47
  48 wxConnectionBase::wxConnectionBase(const wxConnectionBase& copy)
  49     : wxObject(),
  50       m_buffer(copy.m_buffer),
  51       m_buffersize(copy.m_buffersize),
  52       m_deletebufferwhendone(false),
  53       m_connected(copy.m_connected)
  54
  55 {
  56   // copy constructor would require ref-counted pointer to buffer
  57   wxFAIL_MSG( wxT("Copy constructor of wxConnectionBase not implemented") );
  58 }
  59
  60
  61 wxConnectionBase::~wxConnectionBase()
  62 {
  63   if ( m_deletebufferwhendone )
  64     delete [] m_buffer;
  65 }
  66
  67 /* static */
  68 wxString wxConnectionBase::GetTextFromData(const void* data,
  69                                            size_t size,
  70                                            wxIPCFormat fmt)
  71 {
  72     wxString s;
  73     switch ( fmt )
  74     {
  75         case wxIPC_TEXT:
  76             // normally the string should be NUL-terminated and size should
  77             // include the total size of the buffer, including NUL -- but don't
  78             // crash (by trying to access (size_t)-1 bytes) if it doesn't
  79             if ( size )
  80                 size--;
  81
  82             s = wxString(static_cast<const char *>(data), size);
  83             break;
  84
  85 #if wxUSE_UNICODE
  86         // TODO: we should handle both wxIPC_UTF16TEXT and wxIPC_UTF32TEXT here
  87         //       for inter-platform IPC
  88         case wxIPC_UNICODETEXT:
  89             wxASSERT_MSG( !(size % sizeof(wchar_t)), "invalid buffer size" );
  90             if ( size )
  91             {
  92                 size /= sizeof(wchar_t);
  93                 size--;
  94             }
  95
  96             s = wxString(static_cast<const wchar_t *>(data), size);
  97             break;
  98
  99         case wxIPC_UTF8TEXT:
 100             if ( size )
 101                 size--;
 102
 103             s = wxString::FromUTF8(static_cast<const char *>(data), size);
 104             break;
 105 #endif // wxUSE_UNICODE
 106
 107         default:
 108             wxFAIL_MSG( "non-string IPC format in GetTextFromData()" );
 109     }
 110
 111     return s;
 112 }
 113
 114 void *wxConnectionBase::GetBufferAtLeast( size_t bytes )
 115 {
 116   if ( m_buffersize >= bytes )
 117     return m_buffer;
 118   else
 119   {  // need to resize buffer
 120     if ( m_deletebufferwhendone )
 121     { // we're in charge of buffer, increase it
 122       delete [] m_buffer;
 123       m_buffer = new char[bytes];
 124       m_buffersize = bytes;
 125       return m_buffer;
 126     } // user-supplied buffer, fail
 127     else
 128       return NULL;
 129   }
 130 }