--- a/libiberty/vasprintf.c	Sun Aug 21 07:07:55 2011 +0900
+++ b/libiberty/vasprintf.c	Fri Oct 27 22:46:09 2017 +0900
@@ -1,6 +1,6 @@
 /* Like vsprintf but provides a pointer to malloc'd storage, which must
    be freed by the caller.
-   Copyright (C) 1994, 2003, 2011 Free Software Foundation, Inc.
+   Copyright (C) 1994-2017 Free Software Foundation, Inc.
 
 This file is part of the libiberty library.
 Libiberty is free software; you can redistribute it and/or
@@ -14,9 +14,9 @@
 Library General Public License for more details.
 
 You should have received a copy of the GNU Library General Public
-License along with libiberty; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
-Boston, MA 02110-1301, USA.  */
+License along with libiberty; see the file COPYING.LIB.  If not, write
+to the Free Software Foundation, Inc., 51 Franklin Street - Fifth
+Floor, Boston, MA 02110-1301, USA.  */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
@@ -33,10 +33,10 @@
 #ifdef HAVE_STDLIB_H
 #include <stdlib.h>
 #else
-extern unsigned long strtoul ();
 extern PTR malloc ();
 #endif
 #include "libiberty.h"
+#include "vprintf-support.h"
 
 #ifdef TEST
 int global_total_width;
@@ -64,81 +64,7 @@
 static int
 int_vasprintf (char **result, const char *format, va_list args)
 {
-  const char *p = format;
-  /* Add one to make sure that it is never zero, which might cause malloc
-     to return NULL.  */
-  int total_width = strlen (format) + 1;
-  va_list ap;
-
-#ifdef va_copy
-  va_copy (ap, args);
-#else
-  memcpy ((PTR) &ap, (PTR) &args, sizeof (va_list));
-#endif
-
-  while (*p != '\0')
-    {
-      if (*p++ == '%')
-	{
-	  while (strchr ("-+ #0", *p))
-	    ++p;
-	  if (*p == '*')
-	    {
-	      ++p;
-	      total_width += abs (va_arg (ap, int));
-	    }
-	  else
-	    total_width += strtoul (p, (char **) &p, 10);
-	  if (*p == '.')
-	    {
-	      ++p;
-	      if (*p == '*')
-		{
-		  ++p;
-		  total_width += abs (va_arg (ap, int));
-		}
-	      else
-	      total_width += strtoul (p, (char **) &p, 10);
-	    }
-	  while (strchr ("hlL", *p))
-	    ++p;
-	  /* Should be big enough for any format specifier except %s and floats.  */
-	  total_width += 30;
-	  switch (*p)
-	    {
-	    case 'd':
-	    case 'i':
-	    case 'o':
-	    case 'u':
-	    case 'x':
-	    case 'X':
-	    case 'c':
-	      (void) va_arg (ap, int);
-	      break;
-	    case 'f':
-	    case 'e':
-	    case 'E':
-	    case 'g':
-	    case 'G':
-	      (void) va_arg (ap, double);
-	      /* Since an ieee double can have an exponent of 307, we'll
-		 make the buffer wide enough to cover the gross case. */
-	      total_width += 307;
-	      break;
-	    case 's':
-	      total_width += strlen (va_arg (ap, char *));
-	      break;
-	    case 'p':
-	    case 'n':
-	      (void) va_arg (ap, char *);
-	      break;
-	    }
-	  p++;
-	}
-    }
-#ifdef va_copy
-  va_end (ap);
-#endif
+  int total_width = libiberty_vprintf_buffer_size (format, args);
 #ifdef TEST
   global_total_width = total_width;
 #endif
@@ -165,10 +91,10 @@
 checkit (const char *format, ...)
 {
   char *result;
-  VA_OPEN (args, format);
-  VA_FIXEDARG (args, const char *, format);
+  va_list args;
+  va_start (args, format);
   vasprintf (&result, format, args);
-  VA_CLOSE (args);
+  va_end (args);
 
   if (strlen (result) < (size_t) global_total_width)
     printf ("PASS: ");