Apply patch [ 1548750 ] wxVsnprintf() various fixes

Part II.
c


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41093 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure.in

@@ -4419,8 +4419,40 @@ define HAVE_UNIX98_PRINTF as 1 in setup.h if it is available.])
     fi
 fi
 
-
 if test "$wxUSE_UNICODE" = yes; then
+
+    dnl our wxVsnprintf() implementation needs to use the system swprintf() in Unicode
+    dnl builds so let's check if swprintf() is declared as C99 imposes:
+    dnl     int swprintf(wchar_t *s, size_t n, const wchar_t *format, ...);
+    dnl or rather as:
+    dnl     int swprintf(wchar_t *s, const wchar_t *format, ...);
+    AC_CHECK_FUNCS(swprintf)
+
+    if test "$ac_cv_func_swprintf" = "yes"; then
+        AC_CACHE_CHECK([if swprintf declaration is broken], wx_cv_func_broken_swprintf_decl,
+            [
+                AC_TRY_COMPILE(
+                    [
+                        #include <stdio.h>
+                        #include <stdarg.h>
+                        #include <wchar.h>
+                    ],
+                    [
+                        wchar_t *buf;
+                        const wchar_t *fmt = L"test";
+                        swprintf(buf, 10u, fmt);
+                    ],
+                    wx_cv_func_broken_swprintf_decl=no,
+                    wx_cv_func_broken_swprintf_decl=yes
+                )
+            ]
+        )
+
+        if test "$wx_cv_func_broken_swprintf_decl" = "yes"; then
+            AC_DEFINE(HAVE_BROKEN_SWPRINTF_DECL)
+        fi
+    fi
+
     dnl also look if we have wide char IO functions
     AC_CHECK_FUNCS(wputc wputchar putws fputws wprintf vswprintf)
 

include/wx/wxchar.h

@@ -1,11 +1,11 @@
 /*
  * Name:        wx/wxchar.h
  * Purpose:     Declarations common to wx char/wchar_t usage (wide chars)
- * Author:      Joel Farley, Ove K<>ven
+ * Author:      Joel Farley, Ove K<>en
  * Modified by: Vadim Zeitlin, Robert Roebling, Ron Lee
  * Created:     1998/06/12
  * RCS-ID:      $Id$
- * Copyright:   (c) 1998-2002 Joel Farley, Ove K<>ven, Robert Roebling, Ron Lee
+ * Copyright:   (c) 1998-2002 Joel Farley, Ove K<>en, Robert Roebling, Ron Lee
  * Licence:     wxWindows licence
  */
 
@@ -928,6 +928,17 @@ WXDLLIMPEXP_BASE bool wxOKlibc(); /* for internal use */
                 #define wxVsnprintf_    vsnprintf
             #endif
         #endif
+    #else
+        // the only exception on Windows is VC++ 8.0; it provides a new family
+        // of printf() functions with positional parameter support which should
+        // behave mostly identic to our wxVsnprintf() implementation
+        #if defined(__VISUALC__) && __VISUALC__ >= 1400
+            #if wxUSE_UNICODE
+                #define wxVsnprintf_    _vsprintf_p
+            #else
+                #define wxVsnprintf_    _vswprintf_p
+            #endif
+        #endif
     #endif
 #endif  // !defined( wxVsnprintf_ ) && wxUSE_PRINTF_POS_PARAMS
 

setup.h.in

@@ -1059,7 +1059,14 @@
 /* Define this if you have wprintf() and related functions */
 #undef HAVE_WPRINTF
 
-/* Define this if you have wprintf() and related functions */
+/* Define this if you have swprintf() */
+#undef HAVE_SWPRINTF
+
+/* Define if you have a _broken_ swprintf() declaration in the header,
+ * without a 'size_t max' parameter as second argument */
+#undef HAVE_BROKEN_SWPRINTF_DECL
+
+/* Define this if you have vswprintf() and related functions */
 #undef HAVE_VSWPRINTF
 
 /* Define this if you have _vsnwprintf */