simplified code (removed 2 unnecessary tests) in CalcMin(), no real changes

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

diff --git a/src/common/string.cpp b/src/common/string.cpp
index 6ddd68f0c7cfb69441da9a37452ca44fb5268189..38351ff5f0d552dfa9d01d028ac6a0ef846a8add 100644 (file)
--- 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;
 }
 
@@ -1790,50 +1796,54 @@ wxString wxString::FormatV(const wxChar *pszFormat, va_list argptr)
 
 int wxString::Printf(const wxChar *pszFormat, ...)
 {
-  va_list argptr;
-  va_start(argptr, pszFormat);
+    va_list argptr;
+    va_start(argptr, pszFormat);
 
-  int iLen = PrintfV(pszFormat, argptr);
+    int iLen = PrintfV(pszFormat, argptr);
 
-  va_end(argptr);
+    va_end(argptr);
 
-  return iLen;
+    return iLen;
 }
 
 int wxString::PrintfV(const wxChar* pszFormat, va_list argptr)
 {
     int size = 1024;
-    int len;
 
     for ( ;; )
     {
+        wxStringBuffer tmp(*this, size + 1);
+        wxChar* buf = tmp;
+
+        if ( !buf )
         {
-            wxStringBuffer tmp(*this, size + 1);
-            wxChar* buf = tmp;
+            // out of memory
+            return -1;
+        }
 
-            if ( !buf )
-            {
-                // out of memory
-                return -1;
-            }
+        // wxVsnprintf() may modify the original arg pointer, so pass it
+        // only a copy
+        va_list argptrcopy;
+        wxVaCopy(argptrcopy, argptr);
+        int len = wxVsnprintf(buf, size, pszFormat, argptrcopy);
+        va_end(argptrcopy);
 
-            // wxVsnprintf() may modify the original arg pointer, so pass it
-            // only a copy
-            va_list argptrcopy;
-            wxVaCopy(argptrcopy, argptr);
-            len = wxVsnprintf(buf, size, pszFormat, argptrcopy);
-            va_end(argptrcopy);
-
-            // some implementations of vsnprintf() don't NUL terminate
-            // the string if there is not enough space for it so
-            // always do it manually
-            buf[size] = _T('\0');
-        }
+        // some implementations of vsnprintf() don't NUL terminate
+        // the string if there is not enough space for it so
+        // always do it manually
+        buf[size] = _T('\0');
 
         // 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;