Correctly handle %p in wprintf (BZ #16890)

stdio-common/tstdiomisc.c

@@ -46,6 +46,24 @@ t2 (void)
   return result;
 }
 
+static int
+t3 (void)
+{
+  char buf[80];
+  wchar_t wbuf[80];
+  int result = 0;
+  int retval;
+
+  retval = sprintf (buf, "%p", (char *) NULL);
+  result |= retval != 5 || strcmp (buf, "(nil)") != 0;
+
+  retval = swprintf (wbuf, sizeof (wbuf) / sizeof (wbuf[0]),
+		     L"%p", (char *) NULL);
+  result |= retval != 5 || wcscmp (wbuf, L"(nil)") != 0;
+
+  return result;
+}
+
 volatile double qnanval;
 volatile long double lqnanval;
 /* A sNaN is only guaranteed to be representable in variables with static (or
@@ -243,6 +261,7 @@ main (int argc, char *argv[])
 
   result |= t1 ();
   result |= t2 ();
+  result |= t3 ();
   result |= F ();
 
   result |= fflush (stdout) == EOF;

stdio-common/vfprintf.c

@@ -936,7 +936,8 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap)
 	    /* Make sure the full string "(nil)" is printed.  */	      \
 	    if (prec < 5)						      \
 	      prec = 5;							      \
-	    is_long = 0;	/* This is no wide-char string.  */	      \
+	    /* This is a wide string iff compiling wprintf.  */		      \
+	    is_long = sizeof (CHAR_T) > 1;				      \
 	    goto LABEL (print_string);					      \
 	  }								      \
       }									      \