sprintf.c (1213B)
1 /* -*-comment-start: "//";comment-end:""-*- 2 * GNU Mes --- Maxwell Equations of Software 3 * Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org> 4 * 5 * This file is part of GNU Mes. 6 * 7 * GNU Mes is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 3 of the License, or (at 10 * your option) any later version. 11 * 12 * GNU Mes is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with GNU Mes. If not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include <mes/lib.h> 22 #include <stdarg.h> 23 #include <stdio.h> 24 25 int 26 sprintf (char *str, char const *format, ...) 27 { 28 va_list ap; 29 int r; 30 #if __GNUC__ && __x86_64__ && !SYSTEM_LIBC 31 #define __FUNCTION_ARGS 2 32 ap += (__FOO_VARARGS + (__FUNCTION_ARGS << 1)) << 3; 33 #undef __FUNCTION_ARGS 34 #endif 35 va_start (ap, format); 36 r = vsprintf (str, format, ap); 37 va_end (ap); 38 return r; 39 }