/* Implement the snprintf function.
- Copyright (C) 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003-2019 Free Software Foundation, Inc.
Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
This file is part of the libiberty library. This library is free
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
As a special exception, if you link this library with files
compiled with a GNU compiler to produce an executable, this does not cause
/*
-@deftypefn Supplemental int snprintf (char *@var{buf}, size_t @var{n}, const char *@var{format}, ...)
+@deftypefn Supplemental int snprintf (char *@var{buf}, size_t @var{n}, @
+ const char *@var{format}, ...)
-This function is similar to sprintf, but it will print at most @var{n}
-characters. On error the return value is -1, otherwise it returns the
-number of characters that would have been printed had @var{n} been
-sufficiently large, regardless of the actual value of @var{n}. Note
-some pre-C99 system libraries do not implement this correctly so users
-cannot generally rely on the return value if the system version of
-this function is used.
+This function is similar to @code{sprintf}, but it will write to
+@var{buf} at most @code{@var{n}-1} bytes of text, followed by a
+terminating null byte, for a total of @var{n} bytes.
+On error the return value is -1, otherwise it returns the number of
+bytes, not including the terminating null byte, that would have been
+written had @var{n} been sufficiently large, regardless of the actual
+value of @var{n}. Note some pre-C99 system libraries do not implement
+this correctly so users cannot generally rely on the return value if
+the system version of this function is used.
@end deftypefn
snprintf (char *s, size_t n, const char *format, ...)
{
int result;
- VA_OPEN (ap, format);
- VA_FIXEDARG (ap, char *, s);
- VA_FIXEDARG (ap, size_t, n);
- VA_FIXEDARG (ap, const char *, format);
+ va_list ap;
+ va_start (ap, format);
result = vsnprintf (s, n, format, ap);
- VA_CLOSE (ap);
+ va_end (ap);
return result;
}