src/common/ipcbase.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #include "wx/defs.h"
  21 #endif
  22
  23 #include "wx/ipcbase.h"
  24
  25 IMPLEMENT_CLASS(wxServerBase, wxObject)
  26 IMPLEMENT_CLASS(wxClientBase, wxObject)
  27 IMPLEMENT_CLASS(wxConnectionBase, wxObject)
  28
  29 wxConnectionBase::wxConnectionBase(wxChar *buffer, int bytes)
  30     : m_connected(true),
  31       m_buffer(buffer),
  32       m_buffersize(bytes),
  33       m_deletebufferwhendone(false)
  34 {
  35   if ( buffer == (wxChar *)NULL )
  36   { // behave like next constructor
  37     m_buffersize = 0;
  38     m_deletebufferwhendone = true;
  39   }
  40 }
  41
  42 wxConnectionBase::wxConnectionBase()
  43     : m_connected(true),
  44       m_buffer(NULL),
  45       m_buffersize(0),
  46       m_deletebufferwhendone(true)
  47 {
  48 }
  49
  50 wxConnectionBase::wxConnectionBase(const wxConnectionBase& copy)
  51     : wxObject(),
  52       m_connected(copy.m_connected),
  53       m_buffer(copy.m_buffer),
  54       m_buffersize(copy.m_buffersize),
  55       m_deletebufferwhendone(false)
  56
  57 {
  58   // copy constructor would require ref-counted pointer to buffer
  59   wxFAIL_MSG( _T("Copy constructor of wxConnectionBase not implemented") );
  60 }
  61
  62
  63 wxConnectionBase::~wxConnectionBase(void)
  64 {
  65   if ( m_deletebufferwhendone && m_buffer )
  66    delete m_buffer;
  67 }
  68
  69 wxChar *wxConnectionBase::GetBufferAtLeast( size_t bytes )
  70 {
  71   if ( m_buffersize >= bytes )
  72     return m_buffer;
  73   else
  74   {  // need to resize buffer
  75     if ( m_deletebufferwhendone )
  76     { // we're in charge of buffer, increase it
  77       if ( m_buffer )
  78         delete m_buffer;
  79       // the argument specifies **byte size**, but m_buffer is of type
  80       // wxChar. Under unicode: sizeof(wxChar) > 1, so the buffer size is
  81       // bytes / sizeof(wxChar) rounded upwards.
  82       m_buffer = new wxChar[(bytes + sizeof(wxChar) - 1) / sizeof(wxChar)];
  83       m_buffersize = bytes;
  84       return m_buffer;
  85     } // user-supplied buffer, fail
  86     else
  87       return NULL;
  88   }
  89 }
  90