File exiv2_setMsg.patch of Package mingw32-exiv2

diff -rupN exiv2-trunk/include/exiv2/error.hpp exiv2-trunk-new/include/exiv2/error.hpp
--- exiv2-trunk/include/exiv2/error.hpp	2017-03-16 19:13:12.000000000 +0100
+++ exiv2-trunk-new/include/exiv2/error.hpp	2018-07-29 00:52:00.175217226 +0200
@@ -185,6 +185,9 @@ namespace Exiv2 {
         //! Return the error code.
         virtual int code() const throw() =0;
         //@}
+
+    protected:
+        std::string localizedErrMsg(int code);
     }; // AnyError
 
     //! %AnyError output operator
@@ -238,7 +241,7 @@ namespace Exiv2 {
         //! @name Manipulators
         //@{
         //! Assemble the error message from the arguments
-        EXIV2API void setMsg();
+        EXV_DLLLOCAL void setMsg();
         //@}
 
         // DATA
@@ -327,6 +330,76 @@ namespace Exiv2 {
         return wmsg_.c_str();
     }
 #endif
+
+    //! @cond IGNORE
+    template<>
+    inline void BasicError<char>::setMsg()
+    {
+        std::string msg = localizedErrMsg(code_);
+        std::string::size_type pos;
+        pos = msg.find("%0");
+        if (pos != std::string::npos) {
+            msg.replace(pos, 2, toString(code_));
+        }
+        if (count_ > 0) {
+            pos = msg.find("%1");
+            if (pos != std::string::npos) {
+                msg.replace(pos, 2, arg1_);
+            }
+        }
+        if (count_ > 1) {
+            pos = msg.find("%2");
+            if (pos != std::string::npos) {
+                msg.replace(pos, 2, arg2_);
+            }
+        }
+        if (count_ > 2) {
+            pos = msg.find("%3");
+            if (pos != std::string::npos) {
+                msg.replace(pos, 2, arg3_);
+            }
+        }
+        msg_ = msg;
+#ifdef EXV_UNICODE_PATH
+        wmsg_ = s2ws(msg);
+#endif
+    }
+    //! @endcond
+
+#ifdef EXV_UNICODE_PATH
+    template<>
+    inline void BasicError<wchar_t>::setMsg()
+    {
+        std::string s = localizedErrMsg(code_);
+        std::wstring wmsg(s.begin(), s.end());
+        std::wstring::size_type pos;
+        pos = wmsg.find(L"%0");
+        if (pos != std::wstring::npos) {
+            wmsg.replace(pos, 2, toBasicString<wchar_t>(code_));
+        }
+        if (count_ > 0) {
+            pos = wmsg.find(L"%1");
+            if (pos != std::wstring::npos) {
+                wmsg.replace(pos, 2, arg1_);
+            }
+        }
+        if (count_ > 1) {
+            pos = wmsg.find(L"%2");
+            if (pos != std::wstring::npos) {
+                wmsg.replace(pos, 2, arg2_);
+            }
+        }
+        if (count_ > 2) {
+            pos = wmsg.find(L"%3");
+            if (pos != std::wstring::npos) {
+                wmsg.replace(pos, 2, arg3_);
+            }
+        }
+        wmsg_ = wmsg;
+        msg_ = ws2s(wmsg);
+    }
+#endif
+
 #ifdef _MSC_VER
 # pragma warning( default : 4275 )
 #endif
diff -rupN exiv2-trunk/src/error.cpp exiv2-trunk-new/src/error.cpp
--- exiv2-trunk/src/error.cpp	2017-03-08 21:42:28.000000000 +0100
+++ exiv2-trunk-new/src/error.cpp	2018-07-29 00:52:00.175217226 +0200
@@ -133,74 +133,10 @@ namespace Exiv2 {
     {
     }
 
-    //! @cond IGNORE
-    template<>
-    void BasicError<char>::setMsg()
+    std::string AnyError::localizedErrMsg(int code)
     {
-        std::string msg = _(errMsg(code_));
-        std::string::size_type pos;
-        pos = msg.find("%0");
-        if (pos != std::string::npos) {
-            msg.replace(pos, 2, toString(code_));
-        }
-        if (count_ > 0) {
-            pos = msg.find("%1");
-            if (pos != std::string::npos) {
-                msg.replace(pos, 2, arg1_);
-            }
-        }
-        if (count_ > 1) {
-            pos = msg.find("%2");
-            if (pos != std::string::npos) {
-                msg.replace(pos, 2, arg2_);
-            }
-        }
-        if (count_ > 2) {
-            pos = msg.find("%3");
-            if (pos != std::string::npos) {
-                msg.replace(pos, 2, arg3_);
-            }
-        }
-        msg_ = msg;
-#ifdef EXV_UNICODE_PATH
-        wmsg_ = s2ws(msg);
-#endif
+        return _(errMsg(code));
     }
-    //! @endcond
-
-#ifdef EXV_UNICODE_PATH
-    template<>
-    void BasicError<wchar_t>::setMsg()
-    {
-        std::string s = _(errMsg(code_));
-        std::wstring wmsg(s.begin(), s.end());
-        std::wstring::size_type pos;
-        pos = wmsg.find(L"%0");
-        if (pos != std::wstring::npos) {
-            wmsg.replace(pos, 2, toBasicString<wchar_t>(code_));
-        }
-        if (count_ > 0) {
-            pos = wmsg.find(L"%1");
-            if (pos != std::wstring::npos) {
-                wmsg.replace(pos, 2, arg1_);
-            }
-        }
-        if (count_ > 1) {
-            pos = wmsg.find(L"%2");
-            if (pos != std::wstring::npos) {
-                wmsg.replace(pos, 2, arg2_);
-            }
-        }
-        if (count_ > 2) {
-            pos = wmsg.find(L"%3");
-            if (pos != std::wstring::npos) {
-                wmsg.replace(pos, 2, arg3_);
-            }
-        }
-        wmsg_ = wmsg;
-        msg_ = ws2s(wmsg);
-    }
-#endif
 
     const char* errMsg(int code)
     {