don't assume there's always an active wxEventLoop instance

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

diff --git a/src/common/string.cpp b/src/common/string.cpp
index c2bab603e26cf52cb7844689add9f9fdfc078df7..78008c79a79d6e01b7902583142fa184f3d7bd66 100644 (file)
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -35,6 +35,11 @@
 #endif
 
 #include <ctype.h>
 #endif
 
 #include <ctype.h>

+
+#ifndef __WXWINCE__
+    #include <errno.h>
+#endif
+

 #include <string.h>
 #include <stdlib.h>
 
 #include <string.h>
 #include <stdlib.h>
 


@@ -1072,16 +1077,21 @@ wxChar *wxString::GetWriteBuf(size_t nLen)
 // put string back in a reasonable state after GetWriteBuf
 void wxString::UngetWriteBuf()
 {
 // put string back in a reasonable state after GetWriteBuf
 void wxString::UngetWriteBuf()
 {

-  GetStringData()->nDataLength = wxStrlen(m_pchData);
-  GetStringData()->Validate(true);
+  UngetWriteBuf(wxStrlen(m_pchData));

 }
 
 void wxString::UngetWriteBuf(size_t nLen)
 {
 }
 
 void wxString::UngetWriteBuf(size_t nLen)
 {

-  GetStringData()->nDataLength = nLen;
-  GetStringData()->Validate(true);
+  wxStringData * const pData = GetStringData();
+
+  wxASSERT_MSG( nLen < pData->nAllocLength, _T("buffer overrun") );
+
+  // the strings we store are always NUL-terminated
+  pData->data()[nLen] = _T('\0');
+  pData->nDataLength = nLen;
+  pData->Validate(true);

 }
 }

-#endif
+#endif // !wxUSE_STL

 
 // ---------------------------------------------------------------------------
 // data access
 
 // ---------------------------------------------------------------------------
 // data access


@@ -1603,7 +1613,7 @@ wxString& wxString::Trim(bool bFromRight)
             reverse_iterator psz = rbegin();
             while ( (psz != rend()) && wxSafeIsspace(*psz) )
                 psz++;
             reverse_iterator psz = rbegin();
             while ( (psz != rend()) && wxSafeIsspace(*psz) )
                 psz++;

-            
+

             // truncate at trailing space start
             erase(psz.base(), end());
         }
             // truncate at trailing space start
             erase(psz.base(), end());
         }


@@ -1674,45 +1684,87 @@ int wxString::Find(const wxChar *pszSub) const
 // conversion to numbers
 // ----------------------------------------------------------------------------
 
 // conversion to numbers
 // ----------------------------------------------------------------------------
 

-bool wxString::ToLong(long *val, int base) const
+// the implementation of all the functions below is exactly the same so factor
+// it out
+
+template <typename T, typename F>
+bool wxStringToIntType(const wxChar *start,
+                       T *val,
+                       int base,
+                       F func)

 {
 {

-    wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToLong") );
+    wxCHECK_MSG( val, false, _T("NULL output pointer") );

     wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
 
     wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
 

-    const wxChar *start = c_str();
+#ifndef __WXWINCE__
+    errno = 0;
+#endif
+

     wxChar *end;
     wxChar *end;

-    *val = wxStrtol(start, &end, base);
+    *val = (*func)(start, &end, base);

 
     // return true only if scan was stopped by the terminating NUL and if the
 
     // return true only if scan was stopped by the terminating NUL and if the

-    // string was not empty to start with
-    return !*end && (end != start);
+    // string was not empty to start with and no under/overflow occurred
+    return !*end && (end != start)
+#ifndef __WXWINCE__
+        && (errno != ERANGE)
+#endif
+    ;
+}
+
+bool wxString::ToLong(long *val, int base) const
+{
+    return wxStringToIntType(c_str(), val, base, wxStrtol);

 }
 
 bool wxString::ToULong(unsigned long *val, int base) const
 {
 }
 
 bool wxString::ToULong(unsigned long *val, int base) const
 {

-    wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToULong") );
-    wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );
+    return wxStringToIntType(c_str(), val, base, wxStrtoul);
+}

 
 

-    const wxChar *start = c_str();
-    wxChar *end;
-    *val = wxStrtoul(start, &end, base);
+bool wxString::ToLongLong(wxLongLong_t *val, int base) const
+{
+#ifdef wxHAS_STRTOLL
+    return wxStringToIntType(c_str(), val, base, wxStrtoll);
+#else
+    // TODO: implement this ourselves
+    wxUnusedVar(val);
+    wxUnusedVar(base);
+    return false;
+#endif // wxHAS_STRTOLL
+}

 
 

-    // return true only if scan was stopped by the terminating NUL and if the
-    // string was not empty to start with
-    return !*end && (end != start);
+bool wxString::ToULongLong(wxULongLong_t *val, int base) const
+{
+#ifdef wxHAS_STRTOLL
+    return wxStringToIntType(c_str(), val, base, wxStrtoull);
+#else
+    // TODO: implement this ourselves
+    wxUnusedVar(val);
+    wxUnusedVar(base);
+    return false;
+#endif

 }
 
 bool wxString::ToDouble(double *val) const
 {
     wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") );
 
 }
 
 bool wxString::ToDouble(double *val) const
 {
     wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") );
 

+#ifndef __WXWINCE__
+    errno = 0;
+#endif
+

     const wxChar *start = c_str();
     wxChar *end;
     *val = wxStrtod(start, &end);
 
     // return true only if scan was stopped by the terminating NUL and if the
     const wxChar *start = c_str();
     wxChar *end;
     *val = wxStrtod(start, &end);
 
     // return true only if scan was stopped by the terminating NUL and if the

-    // string was not empty to start with
-    return !*end && (end != start);
+    // string was not empty to start with and no under/overflow occurred
+    return !*end && (end != start)
+#ifndef __WXWINCE__
+        && (errno != ERANGE)
+#endif
+    ;

 }
 
 // ---------------------------------------------------------------------------
 }
 
 // ---------------------------------------------------------------------------


@@ -1785,13 +1837,29 @@ int wxString::PrintfV(const wxChar* pszFormat, va_list argptr)
         // buffer were large enough (newer standards such as Unix98)
         if ( len < 0 )
         {
         // buffer were large enough (newer standards such as Unix98)
         if ( len < 0 )
         {

+#if wxUSE_WXVSNPRINTF
+            // we know that our own implementation of wxVsnprintf() returns -1
+            // only for a format error - thus there's something wrong with
+            // the user's format string
+            return -1;
+#else // assume that system version only returns error if not enough space

             // still not enough, as we don't know how much we need, double the
             // current size of the buffer
             size *= 2;
             // still not enough, as we don't know how much we need, double the
             // current size of the buffer
             size *= 2;

+#endif // wxUSE_WXVSNPRINTF/!wxUSE_WXVSNPRINTF

         }
         }

-        else if ( len > size )
+        else if ( len >= size )

         {
         {

-            size = len;
+#if wxUSE_WXVSNPRINTF
+            // we know that our own implementation of wxVsnprintf() returns 
+            // size+1 when there's not enough space but that's not the size
+            // of the required buffer!
+            size *= 2;      // so we just double the current size of the buffer
+#else
+            // some vsnprintf() implementations NUL-terminate the buffer and
+            // some don't in len == size case, to be safe always add 1
+            size = len + 1;
+#endif

         }
         else // ok, there was enough space
         {
         }
         else // ok, there was enough space
         {


@@ -2136,13 +2204,16 @@ void wxArrayString::Alloc(size_t nSize)
 {
   // only if old buffer was not big enough
   if ( nSize > m_nSize ) {
 {
   // only if old buffer was not big enough
   if ( nSize > m_nSize ) {

-    Free();
-    wxDELETEA(m_pItems);
-    m_pItems = new wxChar *[nSize];
+    wxChar **pNew = new wxChar *[nSize];
+    if ( !pNew )
+        return;
+
+    memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *));
+    delete [] m_pItems;
+
+    m_pItems = pNew;

     m_nSize  = nSize;
   }
     m_nSize  = nSize;
   }

-
-  m_nCount = 0;

 }
 
 // minimizes the memory usage by freeing unused memory
 }
 
 // minimizes the memory usage by freeing unused memory