added wxMBConv::Clone() to be able to copy conversion objects polymorphically

[wxWidgets.git] / include / wx / buffer.h

diff --git a/include/wx/buffer.h b/include/wx/buffer.h
index 3e52ab1a31427976eb1e0291f7e5991cee9af10b..fa8f3215c5b5943386fff9422e50a357df605689 100644 (file)
--- a/include/wx/buffer.h
+++ b/include/wx/buffer.h
@@ -6,11 +6,9 @@
 // Created:     12.04.99
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// Licence:     wxWidgets licence
+// Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
-// these classes are for private use only for now, they're not documented
-
 #ifndef _WX_BUFFER_H
 #define _WX_BUFFER_H
 
@@ -24,10 +22,10 @@
 // ----------------------------------------------------------------------------
 
 #define DEFINE_BUFFER(classname, chartype, strdupfunc)                      \
-class classname                                                             \
+class WXDLLIMPEXP_BASE classname                                            \
 {                                                                           \
 public:                                                                     \
-    classname(const chartype *str)                                          \
+    classname(const chartype *str = NULL)                                   \
         : m_str(str ? strdupfunc(str) : NULL)                               \
     {                                                                       \
     }                                                                       \
@@ -66,6 +64,12 @@ public:                                                                     \
         return p;                                                           \
     }                                                                       \
                                                                             \
+    void reset()                                                            \
+    {                                                                       \
+        free(m_str);                                                        \
+        m_str = NULL;                                                       \
+    }                                                                       \
+                                                                            \
     classname(const classname& src)                                         \
         : m_str(src.release())                                              \
     {                                                                       \
@@ -86,6 +90,18 @@ public:                                                                     \
         return *this;                                                       \
     }                                                                       \
                                                                             \
+    bool extend(size_t len)                                                 \
+    {                                                                       \
+        chartype *                                                          \
+            str = (chartype *)realloc(m_str, (len + 1)*sizeof(chartype));   \
+        if ( !str )                                                         \
+            return false;                                                   \
+                                                                            \
+        m_str = str;                                                        \
+                                                                            \
+        return true;                                                        \
+    }                                                                       \
+                                                                            \
     chartype *data() { return m_str; }                                      \
     const chartype *data() const { return m_str; }                          \
     operator const chartype *() const { return m_str; }                     \
@@ -126,13 +142,13 @@ class wxMemoryBufferData
 {
 public:
     // the initial size and also the size added by ResizeIfNeeded()
-    enum { BLOCK_SIZE = 1024 };
+    enum { DefBufSize = 1024 };
 
     friend class wxMemoryBuffer;
 
     // everyting is private as it can only be used by wxMemoryBuffer
 private:
-    wxMemoryBufferData(size_t size = wxMemoryBufferData::BLOCK_SIZE)
+    wxMemoryBufferData(size_t size = wxMemoryBufferData::DefBufSize)
         : m_data(size ? malloc(size) : NULL), m_size(size), m_len(0), m_ref(0)
     {
     }
@@ -144,13 +160,13 @@ private:
         if (newSize > m_size)
         {
             void *dataOld = m_data;
-            m_data = realloc(m_data, newSize + wxMemoryBufferData::BLOCK_SIZE);
+            m_data = realloc(m_data, newSize + wxMemoryBufferData::DefBufSize);
             if ( !m_data )
             {
                 free(dataOld);
             }
 
-            m_size = newSize + wxMemoryBufferData::BLOCK_SIZE;
+            m_size = newSize + wxMemoryBufferData::DefBufSize;
         }
     }
 
@@ -183,7 +199,7 @@ class wxMemoryBuffer
 {
 public:
     // ctor and dtor
-    wxMemoryBuffer(size_t size = wxMemoryBufferData::BLOCK_SIZE)
+    wxMemoryBuffer(size_t size = wxMemoryBufferData::DefBufSize)
     {
         m_bufdata = new wxMemoryBufferData(size);
         m_bufdata->IncRef();
@@ -253,7 +269,7 @@ public:
         m_bufdata->m_len += 1;
     }
 
-    void  AppendData(void* data, size_t len)
+    void  AppendData(const void *data, size_t len)
     {
         memcpy(GetAppendBuf(len), data, len);
         UngetAppendBuf(len);