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 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20 #endif
  21
  22 #include "wx/ipcbase.h"
  23
  24 IMPLEMENT_CLASS(wxServerBase, wxObject)
  25 IMPLEMENT_CLASS(wxClientBase, wxObject)
  26 IMPLEMENT_CLASS(wxConnectionBase, wxObject)
  27
  28 wxConnectionBase::wxConnectionBase(wxChar *buffer, int bytes)
  29     : m_connected(true),
  30       m_buffer(buffer),
  31       m_buffersize(bytes),
  32       m_deletebufferwhendone(false)
  33 {
  34   if ( buffer == (wxChar *)NULL )
  35   { // behave like next constructor
  36     m_buffersize = 0;
  37     m_deletebufferwhendone = true;
  38   }
  39 }
  40
  41 wxConnectionBase::wxConnectionBase()
  42     : m_connected(true),
  43       m_buffer(NULL),
  44       m_buffersize(0),
  45       m_deletebufferwhendone(true)
  46 {
  47 }
  48
  49 wxConnectionBase::wxConnectionBase(const wxConnectionBase& copy)
  50     : wxObject(),
  51       m_connected(copy.m_connected),
  52       m_buffer(copy.m_buffer),
  53       m_buffersize(copy.m_buffersize),
  54       m_deletebufferwhendone(false)
  55
  56 {
  57   // copy constructor would require ref-counted pointer to buffer
  58   wxFAIL_MSG( _T("Copy constructor of wxConnectionBase not implemented") );
  59 }
  60
  61
  62 wxConnectionBase::~wxConnectionBase(void)
  63 {
  64   if ( m_deletebufferwhendone && m_buffer )
  65    delete m_buffer;
  66 }
  67
  68 wxChar *wxConnectionBase::GetBufferAtLeast( size_t bytes )
  69 {
  70   if ( m_buffersize >= bytes )
  71     return m_buffer;
  72   else
  73   {  // need to resize buffer
  74     if ( m_deletebufferwhendone )
  75     { // we're in charge of buffer, increase it
  76       if ( m_buffer )
  77         delete m_buffer;
  78       // the argument specifies **byte size**, but m_buffer is of type
  79       // wxChar. Under unicode: sizeof(wxChar) > 1, so the buffer size is
  80       // bytes / sizeof(wxChar) rounded upwards.
  81       m_buffer = new wxChar[(bytes + sizeof(wxChar) - 1) / sizeof(wxChar)];
  82       m_buffersize = bytes;
  83       return m_buffer;
  84     } // user-supplied buffer, fail
  85     else
  86       return NULL;
  87   }
  88 }