X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c08d805c5a3fb6495509fb2e25af4e398ca434cc..a98ce49a41630c2eabb266fe1597d4e279545023:/src/common/string.cpp

diff --git a/src/common/string.cpp b/src/common/string.cpp
index d448b4b306..c95d6729e8 100644
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -43,6 +43,10 @@
 #include <string.h>
 #include <stdlib.h>
 
+#ifndef __WXMSW__
+#include <errno.h>
+#endif
+
 #ifdef __SALFORDC__
   #include <clib.h>
 #endif
@@ -312,13 +316,15 @@ bool wxStringBase::AllocBeforeWrite(size_t nLen)
       pData->nAllocLength = nLen;
       m_pchData = pData->data();
     }
-
-    // now we have enough space, just update the string length
-    pData->nDataLength = nLen;
   }
 
   wxASSERT( !GetStringData()->IsShared() );  // we must be the only owner
 
+  // it doesn't really matter what the string length is as it's going to be
+  // overwritten later but, for extra safety, set it to 0 for now as we may
+  // have some junk in m_pchData
+  GetStringData()->nDataLength = 0;
+
   return true;
 }
 
@@ -380,7 +386,9 @@ bool wxStringBase::Alloc(size_t nLen)
         // allocation failure handled by caller
         return false;
       }
-      memcpy(m_pchData, pData->data(), nOldLen*sizeof(wxChar));
+      // +1 to copy the terminator, too
+      memcpy(m_pchData, pData->data(), (nOldLen+1)*sizeof(wxChar));
+      GetStringData()->nDataLength = nOldLen;
     }
     else {
       nLen += EXTRA_ALLOC;
@@ -1831,7 +1839,14 @@ int wxString::PrintfV(const wxChar* pszFormat, va_list argptr)
         // vsnprintf() may return either -1 (traditional Unix behaviour) or the
         // total number of characters which would have been written if the
         // buffer were large enough
-        if ( len >= 0 && len <= size )
+        // also, it may return an errno may be something like EILSEQ,
+        // in which case we need to break out
+        if ( (len >= 0 && len <= size)
+        // No EOVERFLOW on Windows nor Palm 6.0 nor OpenVMS
+#if !defined(__WXMSW__) && !defined(__WXPALMOS__) && !defined( __VMS )
+            || errno != EOVERFLOW
+#endif
+            )
         {
             // ok, there was enough space
             break;