avoid creating and immediately destroying a wxGraphicsContext when creating a wxDC...

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

diff --git a/include/wx/buffer.h b/include/wx/buffer.h
index 4be2660b67f6337ec91ee3f3398056336ebacbbc..ec0e1fc7651e541c116a88a402f6c2e2621de06a 100644 (file)
--- a/include/wx/buffer.h
+++ b/include/wx/buffer.h
@@ -15,9 +15,7 @@
 #include "wx/chartype.h"
 #include "wx/wxcrtbase.h"
 
-#ifndef __WXPALMOS5__
 #include <stdlib.h>             // malloc() and free()
-#endif // ! __WXPALMOS5__
 
 class WXDLLIMPEXP_FWD_BASE wxCStrData;
 
@@ -95,7 +93,7 @@ public:
     // Creates "owned" buffer, i.e. takes over ownership of 'str' and frees it
     // in dtor (if ref.count reaches 0).
     static
-    const wxScopedCharTypeBuffer CreateOwned(const CharType *str,
+    const wxScopedCharTypeBuffer CreateOwned(CharType *str,
                                              size_t len = wxNO_LEN )
     {
         if ( len == wxNO_LEN )
@@ -103,7 +101,7 @@ public:
 
         wxScopedCharTypeBuffer buf;
         if ( str )
-            buf.m_data = new Data(StrCopy(str, len), len);
+            buf.m_data = new Data(str, len);
         return buf;
     }
 
@@ -260,7 +258,7 @@ public:
         {
             if ( len == wxNO_LEN )
                 len = wxStrlen(str);
-            this->m_data = new Data(StrCopy(str, len), len);
+            this->m_data = new Data(this->StrCopy(str, len), len);
         }
         else
         {
@@ -295,7 +293,7 @@ public:
 
     wxCharTypeBuffer(const wxScopedCharTypeBuffer<T>& src)
     {
-        MakeOwnedCopyOf(src);
+        this->MakeOwnedCopyOf(src);
     }
 
     wxCharTypeBuffer& operator=(const wxScopedCharTypeBuffer<T>& src)
@@ -314,6 +312,10 @@ public:
         if ( !str )
             return false;
 
+        // For consistency with the ctor taking just the length, NUL-terminate
+        // the buffer.
+        str[len] = (CharType)0;
+
         if ( this->m_data == this->GetNullData() )
         {
             this->m_data = new Data(str, len);
@@ -359,7 +361,6 @@ public:
     wxCharBuffer(const wxCStrData& cstr);
 };
 
-#if wxUSE_WCHAR_T
 WXDLLIMPEXP_TEMPLATE_INSTANCE_BASE( wxScopedCharTypeBuffer<wchar_t> )
 WXDLLIMPEXP_TEMPLATE_INSTANCE_BASE( wxCharTypeBuffer<wchar_t> )
 
@@ -379,7 +380,6 @@ public:
 
     wxWCharBuffer(const wxCStrData& cstr);
 };
-#endif // wxUSE_WCHAR_T
 
 // wxCharTypeBuffer<T> implicitly convertible to T*
 template <typename T>
@@ -470,6 +470,21 @@ private:
             delete this;
     }
 
+    void *release()
+    {
+        if ( m_data == NULL )
+            return NULL;
+
+        wxASSERT_MSG( m_ref == 1, "can't release shared buffer" );
+
+        void *p = m_data;
+        m_data = NULL;
+        m_len =
+        m_size = 0;
+
+        return p;
+    }
+
 
     // the buffer containing the data
     void  *m_data;
@@ -524,6 +539,8 @@ public:
     size_t GetBufSize() const { return m_bufdata->m_size; }
     size_t GetDataLen() const { return m_bufdata->m_len; }
 
+    bool IsEmpty() const { return GetDataLen() == 0; }
+
     void   SetBufSize(size_t size) { m_bufdata->ResizeIfNeeded(size); }
     void   SetDataLen(size_t len)
     {
@@ -531,6 +548,8 @@ public:
         m_bufdata->m_len = len;
     }
 
+    void Clear() { SetDataLen(0); }
+
     // Ensure the buffer is big enough and return a pointer to it
     void *GetWriteBuf(size_t sizeNeeded)
     {
@@ -572,6 +591,13 @@ public:
 
     operator const char *() const { return (const char*)GetData(); }
 
+    // gives up ownership of data, returns the pointer; after this call,
+    // data isn't freed by the buffer and its content is resent to empty
+    void *release()
+    {
+        return m_bufdata->release();
+    }
+
 private:
     wxMemoryBufferData*  m_bufdata;
 };