include/wx/buffer.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        buffer.h
   3 // Purpose:     auto buffer classes: buffers which automatically free memory
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     12.04.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // these classes are for private use only for now, they're not documented
  13
  14 #ifndef _WX_BUFFER_H
  15 #define _WX_BUFFER_H
  16
  17 #include "wx/wxchar.h"
  18
  19 #include <string.h> // strdup
  20
  21 // ----------------------------------------------------------------------------
  22 // Special classes for (wide) character strings: they use malloc/free instead
  23 // of new/delete
  24 // ----------------------------------------------------------------------------
  25
  26 class wxCharBuffer
  27 {
  28 public:
  29     wxCharBuffer(const char *str)
  30     {
  31         wxASSERT_MSG( str, wxT("NULL string in wxCharBuffer") );
  32
  33         m_str = str ? strdup(str) : (char *)NULL;
  34     }
  35     wxCharBuffer(size_t len)
  36     {
  37         m_str = (char *)malloc(len+1);
  38         m_str[len] = '\0';
  39     }
  40     // no need to check for NULL, free() does it
  41    ~wxCharBuffer() { free(m_str); }
  42
  43    wxCharBuffer(const wxCharBuffer& src)
  44    {
  45      m_str = src.m_str;
  46      // no reference count yet...
  47      ((wxCharBuffer*)&src)->m_str = (char *)NULL;
  48    }
  49    wxCharBuffer& operator=(const wxCharBuffer& src)
  50    {
  51      m_str = src.m_str;
  52      // no reference count yet...
  53      ((wxCharBuffer*)&src)->m_str = (char *)NULL;
  54      return *this;
  55    }
  56
  57    operator const char *() const { return m_str; }
  58    char operator[](size_t n) const { return m_str[n]; }
  59
  60 private:
  61    char *m_str;
  62 };
  63
  64 #if wxUSE_WCHAR_T
  65 class wxWCharBuffer
  66 {
  67 public:
  68     wxWCharBuffer(const wchar_t *wcs)
  69     {
  70         wxASSERT_MSG( wcs, wxT("NULL string in wxWCharBuffer") );
  71
  72         if (wcs) {
  73           size_t siz = (::wcslen(wcs)+1)*sizeof(wchar_t);
  74           m_wcs = (wchar_t *)malloc(siz);
  75           memcpy(m_wcs, wcs, siz);
  76         }
  77         else m_wcs = (wchar_t *)NULL;
  78     }
  79     wxWCharBuffer(size_t len)
  80     {
  81         m_wcs = (wchar_t *)malloc((len+1)*sizeof(wchar_t));
  82         m_wcs[len] = L'\0';
  83     }
  84
  85     // no need to check for NULL, free() does it
  86    ~wxWCharBuffer() { free(m_wcs); }
  87
  88    wxWCharBuffer(const wxWCharBuffer& src)
  89    {
  90      m_wcs = src.m_wcs;
  91      // no reference count yet...
  92      ((wxWCharBuffer*)&src)->m_wcs = (wchar_t *)NULL;
  93    }
  94    wxWCharBuffer& operator=(const wxWCharBuffer& src)
  95    {
  96      m_wcs = src.m_wcs;
  97      // no reference count yet...
  98      ((wxWCharBuffer*)&src)->m_wcs = (wchar_t *)NULL;
  99      return *this;
 100    }
 101
 102    operator const wchar_t *() const { return m_wcs; }
 103    wchar_t operator[](size_t n) const { return m_wcs[n]; }
 104
 105 private:
 106    wchar_t *m_wcs;
 107 };
 108 #endif
 109
 110 #if wxUSE_UNICODE
 111     #define wxMB2WXbuf wxWCharBuffer
 112     #define wxWX2MBbuf wxCharBuffer
 113     #define wxWC2WXbuf wxChar*
 114     #define wxWX2WCbuf wxChar*
 115 #else // ANSI
 116     #define wxMB2WXbuf wxChar*
 117     #define wxWX2MBbuf wxChar*
 118     #define wxWC2WXbuf wxCharBuffer
 119     #define wxWX2WCbuf wxWCharBuffer
 120 #endif // Unicode/ANSI
 121
 122 // ----------------------------------------------------------------------------
 123 // template class for any kind of data
 124 // ----------------------------------------------------------------------------
 125
 126 // TODO
 127
 128 #endif // _WX_BUFFER_H