Subversion Repositories openrisc_2011-10-31

/* Implement the snprintf function.

   Copyright (C) 2003 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

software; you can redistribute it and/or modify it under the

terms of the GNU General Public License as published by the

Free Software Foundation; either version 2, or (at your option)

any later version.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

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, 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

the resulting executable to be covered by the GNU General Public License.

This exception does not however invalidate any other reasons why

the executable file might be covered by the GNU General Public License. */

/*

@deftypefn Supplemental int snprintf (char *@var{buf}, size_t @var{n}, const char *@var{format}, ...)

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

*/

#include "ansidecl.h"

#include <stdarg.h>

#include <stddef.h>

int vsnprintf (char *, size_t, const char *, va_list);

int

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);

  result = vsnprintf (s, n, format, ap);

  VA_CLOSE (ap);

  return result;

}