X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1774c3c535957de3ba1ca85fce944767d40bdcb2..2e51fb3041e78ef15506ed746ed5898536be5955:/include/wx/stringops.h

diff --git a/include/wx/stringops.h b/include/wx/stringops.h
index 2e36900adc..c7eb83bc4b 100644
--- a/include/wx/stringops.h
+++ b/include/wx/stringops.h
@@ -28,25 +28,21 @@
 struct WXDLLIMPEXP_BASE wxStringOperationsWchar
 {
     // moves the iterator to the next Unicode character
-    static void IncIter(wxStringImpl::iterator& i) { ++i; }
-    static void IncIter(wxStringImpl::const_iterator& i) { ++i; }
+    template <typename Iterator>
+    static void IncIter(Iterator& i) { ++i; }
 
     // moves the iterator to the previous Unicode character
-    static void DecIter(wxStringImpl::iterator& i) { --i; }
-    static void DecIter(wxStringImpl::const_iterator& i) { --i; }
+    template <typename Iterator>
+    static void DecIter(Iterator& i) { --i; }
 
     // moves the iterator by n Unicode characters
-    static wxStringImpl::iterator AddToIter(const wxStringImpl::iterator& i, int n)
-        { return i + n; }
-    static wxStringImpl::const_iterator AddToIter(const wxStringImpl::const_iterator& i, int n)
+    template <typename Iterator>
+    static Iterator AddToIter(const Iterator& i, ptrdiff_t n)
         { return i + n; }
 
     // returns distance of the two iterators in Unicode characters
-    static int DiffIters(const wxStringImpl::iterator& i1,
-                         const wxStringImpl::iterator& i2)
-        { return i1 - i2; }
-    static int DiffIters(const wxStringImpl::const_iterator& i1,
-                         const wxStringImpl::const_iterator& i2)
+    template <typename Iterator>
+    static ptrdiff_t DiffIters(const Iterator& i1, const Iterator& i2)
         { return i1 - i2; }
 
     // encodes the character to a form used to represent it in internal
@@ -65,9 +61,10 @@ struct WXDLLIMPEXP_BASE wxStringOperationsUtf8
     // checks correctness of UTF-8 sequence
     static bool IsValidUtf8String(const char *c,
                                   size_t len = wxStringImpl::npos);
-#ifdef __WXDEBUG__
-    static bool IsValidUtf8LeadByte(unsigned char c);
-#endif
+    static bool IsValidUtf8LeadByte(unsigned char c)
+    {
+        return (c <= 0x7F) || (c >= 0xC2 && c <= 0xF4);
+    }
 
     // table of offsets to skip forward when iterating over UTF-8 sequence
     static const unsigned char ms_utf8IterTable[256];
@@ -97,18 +94,18 @@ struct WXDLLIMPEXP_BASE wxStringOperationsUtf8
     }
 
     template<typename Iterator>
-    static Iterator AddToIter(const Iterator& i, int n)
+    static Iterator AddToIter(const Iterator& i, ptrdiff_t n)
     {
         Iterator out(i);
 
         if ( n > 0 )
         {
-            for ( int j = 0; j < n; ++j )
+            for ( ptrdiff_t j = 0; j < n; ++j )
                 IncIter(out);
         }
         else if ( n < 0 )
         {
-            for ( int j = 0; j > n; --j )
+            for ( ptrdiff_t j = 0; j > n; --j )
                 DecIter(out);
         }
 
@@ -116,9 +113,9 @@ struct WXDLLIMPEXP_BASE wxStringOperationsUtf8
     }
 
     template<typename Iterator>
-    static int DiffIters(Iterator i1, Iterator i2)
+    static ptrdiff_t DiffIters(Iterator i1, Iterator i2)
     {
-        int dist = 0;
+        ptrdiff_t dist = 0;
 
         if ( i1 < i2 )
         {