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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "ipcbase.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/defs.h"
  25 #endif
  26
  27 #include "wx/ipcbase.h"
  28
  29 IMPLEMENT_CLASS(wxServerBase, wxObject)
  30 IMPLEMENT_CLASS(wxClientBase, wxObject)
  31 IMPLEMENT_CLASS(wxConnectionBase, wxObject)
  32
  33 wxConnectionBase::wxConnectionBase(wxChar *buffer, int bytes)
  34     : m_connected(true),
  35       m_buffer(buffer),
  36       m_buffersize(bytes),
  37       m_deletebufferwhendone(false)
  38 {
  39   if ( buffer == (wxChar *)NULL )
  40   { // behave like next constructor
  41     m_buffersize = 0;
  42     m_deletebufferwhendone = true;
  43   }
  44 }
  45
  46 wxConnectionBase::wxConnectionBase()
  47     : m_connected(true),
  48       m_buffer(NULL),
  49       m_buffersize(0),
  50       m_deletebufferwhendone(true)
  51 {
  52 }
  53
  54 wxConnectionBase::wxConnectionBase(wxConnectionBase& copy)
  55     : wxObject(),
  56       m_connected(copy.m_connected),
  57       m_buffer(copy.m_buffer),
  58       m_buffersize(copy.m_buffersize),
  59       m_deletebufferwhendone(false)
  60
  61 {
  62   // copy constructor would require ref-counted pointer to buffer
  63   wxFAIL_MSG( _T("Copy constructor of wxConnectionBase not implemented") );
  64 }
  65
  66
  67 wxConnectionBase::~wxConnectionBase(void)
  68 {
  69   if ( m_deletebufferwhendone && m_buffer )
  70    delete m_buffer;
  71 }
  72
  73 wxChar *wxConnectionBase::GetBufferAtLeast( size_t bytes )
  74 {
  75   if ( m_buffersize >= bytes )
  76     return m_buffer;
  77   else
  78   {  // need to resize buffer
  79     if ( m_deletebufferwhendone )
  80     { // we're in charge of buffer, increase it
  81       if ( m_buffer )
  82         delete m_buffer;
  83       // the argument specifies **byte size**, but m_buffer is of type
  84       // wxChar. Under unicode: sizeof(wxChar) > 1, so the buffer size is
  85       // bytes / sizeof(wxChar) rounded upwards.
  86       m_buffer = new wxChar[(bytes + sizeof(wxChar) - 1) / sizeof(wxChar)];
  87       m_buffersize = bytes;
  88       return m_buffer;
  89     } // user-supplied buffer, fail
  90     else
  91       return NULL;
  92   }
  93 }
  94