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[wxWidgets.git] / src / common / stringimpl.cpp

diff --git a/src/common/stringimpl.cpp b/src/common/stringimpl.cpp
index 429f3843bdc94838c503b028d484e857fa8f24b3..3dad9eb3c0e9489e2e8441d8df721533b45e6f44 100644 (file)
--- a/src/common/stringimpl.cpp
+++ b/src/common/stringimpl.cpp
@@ -4,7 +4,6 @@
 // Author:      Vadim Zeitlin, Ryan Norton
 // Modified by:
 // Created:     29/01/98
-// RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
 //              (c) 2004 Ryan Norton <wxprojects@comcast.net>
 // Licence:     wxWindows licence
@@ -395,14 +394,14 @@ bool wxStringImpl::Alloc(size_t nLen)
 
 wxStringImpl::iterator wxStringImpl::begin()
 {
-    if (length() > 0)
+    if ( !empty() )
         CopyBeforeWrite();
     return m_pchData;
 }
 
 wxStringImpl::iterator wxStringImpl::end()
 {
-    if (length() > 0)
+    if ( !empty() )
         CopyBeforeWrite();
     return m_pchData + length();
 }
@@ -528,7 +527,7 @@ size_t wxStringImpl::rfind(const wxStringImpl& str, size_t nStart) const
     if ( length() >= str.length() )
     {
         // avoids a corner case later
-        if ( length() == 0 && str.length() == 0 )
+        if ( empty() && str.empty() )
             return 0;
 
         // "top" is the point where search starts from
@@ -681,7 +680,11 @@ bool wxStringImpl::AssignCopy(size_t nSrcLen,
       // allocation failure handled by caller
       return false;
     }
-    memcpy(m_pchData, pszSrcData, nSrcLen*sizeof(wxStringCharType));
+
+    // use memmove() and not memcpy() here as we might be copying from our own
+    // buffer in case of assignment such as "s = s.c_str()" (see #11294)
+    memmove(m_pchData, pszSrcData, nSrcLen*sizeof(wxStringCharType));
+
     GetStringData()->nDataLength = nSrcLen;
     m_pchData[nSrcLen] = wxT('\0');
   }