1/* Implement the snprintf function. 2 Copyright (C) 2003 Free Software Foundation, Inc. 3 Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>. 4 5This file is part of the libiberty library. This library is free 6software; you can redistribute it and/or modify it under the 7terms of the GNU General Public License as published by the 8Free Software Foundation; either version 2, or (at your option) 9any later version. 10 11This library is distributed in the hope that it will be useful, 12but WITHOUT ANY WARRANTY; without even the implied warranty of 13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14GNU General Public License for more details. 15 16You should have received a copy of the GNU General Public License 17along with GNU CC; see the file COPYING. If not, write to 18the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. 19 20As a special exception, if you link this library with files 21compiled with a GNU compiler to produce an executable, this does not cause 22the resulting executable to be covered by the GNU General Public License. 23This exception does not however invalidate any other reasons why 24the executable file might be covered by the GNU General Public License. */ 25 26/* 27 28@deftypefn Supplemental int snprintf (char *@var{buf}, size_t @var{n}, const char *@var{format}, ...) 29 30This function is similar to sprintf, but it will print at most @var{n} 31characters. On error the return value is -1, otherwise it returns the 32number of characters that would have been printed had @var{n} been 33sufficiently large, regardless of the actual value of @var{n}. Note 34some pre-C99 system libraries do not implement this correctly so users 35cannot generally rely on the return value if the system version of 36this function is used. 37 38@end deftypefn 39 40*/ 41 42#include "ansidecl.h" 43 44#include <stdarg.h> 45#include <stddef.h> 46 47int vsnprintf (char *, size_t, const char *, va_list); 48 49int 50snprintf (char *s, size_t n, const char *format, ...) 51{ 52 int result; 53 VA_OPEN (ap, format); 54 VA_FIXEDARG (ap, char *, s); 55 VA_FIXEDARG (ap, size_t, n); 56 VA_FIXEDARG (ap, const char *, format); 57 result = vsnprintf (s, n, format, ap); 58 VA_CLOSE (ap); 59 return result; 60} 61