61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/* 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 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.
|
|
|
|
@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;
|
|
}
|