X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b5dbe15d0bacde245539f54c4d97af6b4696f01f..51fb8678192eaba41e4a446f092c0027d786bd05:/include/wx/longlong.h

diff --git a/include/wx/longlong.h b/include/wx/longlong.h
index e05287c965..f248bb6d21 100644
--- a/include/wx/longlong.h
+++ b/include/wx/longlong.h
@@ -177,7 +177,7 @@ public:
     long ToLong() const
     {
         wxASSERT_MSG( (m_ll >= LONG_MIN) && (m_ll <= LONG_MAX),
-                      _T("wxLongLong to long conversion loss of precision") );
+                      wxT("wxLongLong to long conversion loss of precision") );
 
         return wx_truncate_cast(long, m_ll);
     }
@@ -404,15 +404,20 @@ public:
         // convert to ulong with range checking in debug mode (only!)
     unsigned long ToULong() const
     {
-        wxASSERT_MSG( m_ll <= LONG_MAX,
-                      _T("wxULongLong to long conversion loss of precision") );
+        wxASSERT_MSG( m_ll <= ULONG_MAX,
+                      wxT("wxULongLong to long conversion loss of precision") );
 
         return wx_truncate_cast(unsigned long, m_ll);
     }
 
         // convert to double
-#ifdef _MSC_VER
-    double ToDouble() const { return wx_truncate_cast(double, (__int64) m_ll); }
+        //
+        // For some completely obscure reasons compiling the cast below with
+        // VC6 in DLL builds only (!) results in "error C2520: conversion from
+        // unsigned __int64 to double not implemented, use signed __int64" so
+        // we must use a different version for that compiler.
+#ifdef __VISUALC6__
+    double ToDouble() const;
 #else
     double ToDouble() const { return wx_truncate_cast(double, m_ll); }
 #endif
@@ -683,7 +688,7 @@ public:
     long ToLong() const
     {
         wxASSERT_MSG( (m_hi == 0l) || (m_hi == -1l),
-                      _T("wxLongLong to long conversion loss of precision") );
+                      wxT("wxLongLong to long conversion loss of precision") );
 
         return (long)m_lo;
     }
@@ -908,7 +913,7 @@ public:
     unsigned long ToULong() const
     {
         wxASSERT_MSG( m_hi == 0ul,
-                      _T("wxULongLong to long conversion loss of precision") );
+                      wxT("wxULongLong to long conversion loss of precision") );
 
         return (unsigned long)m_lo;
     }
@@ -1075,6 +1080,39 @@ WXDLLIMPEXP_BASE class wxTextInputStream &operator>>(class wxTextInputStream &st
 
 #endif
 
+// ----------------------------------------------------------------------------
+// Specialize numeric_limits<> for our long long wrapper classes.
+// ----------------------------------------------------------------------------
+
+#if wxUSE_LONGLONG_NATIVE
+
+// VC6 is known to not have __int64 specializations of numeric_limits<> in its
+// <limits> anyhow so don't bother including it, especially as it results in
+// tons of warnings because the standard header itself uses obsolete template
+// specialization syntax.
+#ifndef __VISUALC6__
+
+#include <limits>
+
+namespace std
+{
+
+template<> class numeric_limits<wxLongLong>
+    : public numeric_limits<wxLongLong_t>
+{
+};
+
+template<> class numeric_limits<wxULongLong>
+    : public numeric_limits<wxULongLong_t>
+{
+};
+
+} // namespace std
+
+#endif // !VC6
+
+#endif // wxUSE_LONGLONG_NATIVE
+
 #endif // wxUSE_LONGLONG
 
 #endif // _WX_LONGLONG_H