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 #if (defined(__BORLANDC__) && (__BORLANDC__ > 0x530))
  74           size_t siz = (std::wcslen(wcs)+1)*sizeof(wchar_t);
  75 #else
  76           size_t siz = (::wcslen(wcs)+1)*sizeof(wchar_t);
  77 #endif
  78           m_wcs = (wchar_t *)malloc(siz);
  79           memcpy(m_wcs, wcs, siz);
  80         }
  81         else m_wcs = (wchar_t *)NULL;
  82     }
  83     wxWCharBuffer(size_t len)
  84     {
  85         m_wcs = (wchar_t *)malloc((len+1)*sizeof(wchar_t));
  86         m_wcs[len] = L'\0';
  87     }
  88
  89     // no need to check for NULL, free() does it
  90    ~wxWCharBuffer() { free(m_wcs); }
  91
  92    wxWCharBuffer(const wxWCharBuffer& src)
  93    {
  94      m_wcs = src.m_wcs;
  95      // no reference count yet...
  96      ((wxWCharBuffer*)&src)->m_wcs = (wchar_t *)NULL;
  97    }
  98    wxWCharBuffer& operator=(const wxWCharBuffer& src)
  99    {
 100      m_wcs = src.m_wcs;
 101      // no reference count yet...
 102      ((wxWCharBuffer*)&src)->m_wcs = (wchar_t *)NULL;
 103      return *this;
 104    }
 105
 106    operator const wchar_t *() const { return m_wcs; }
 107    wchar_t operator[](size_t n) const { return m_wcs[n]; }
 108
 109 private:
 110    wchar_t *m_wcs;
 111 };
 112 #endif
 113
 114 #if wxUSE_UNICODE
 115     #define wxMB2WXbuf wxWCharBuffer
 116     #define wxWX2MBbuf wxCharBuffer
 117     #define wxWC2WXbuf wxChar*
 118     #define wxWX2WCbuf wxChar*
 119 #else // ANSI
 120     #define wxMB2WXbuf wxChar*
 121     #define wxWX2MBbuf wxChar*
 122     #define wxWC2WXbuf wxCharBuffer
 123     #define wxWX2WCbuf wxWCharBuffer
 124 #endif // Unicode/ANSI
 125
 126 // ----------------------------------------------------------------------------
 127 // template class for any kind of data
 128 // ----------------------------------------------------------------------------
 129
 130 // TODO
 131
 132 #endif // _WX_BUFFER_H