fdungetc.c (1148B)
1 /* -*-comment-start: "//";comment-end:""-*- 2 * GNU Mes --- Maxwell Equations of Software 3 * Copyright © 2016,2017,2018,2019 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 23 int 24 fdungetc (int c, int fd) 25 { 26 if (c == -1) 27 return c; 28 else if (__ungetc_p (fd)) 29 { 30 eputs (" ***MES C LIB*** fdungetc ungetc buffer overflow fd="); 31 eputs (itoa (fd)); 32 eputs ("\n"); 33 assert_msg (0, "0"); 34 } 35 __ungetc_set (fd, c); 36 return c; 37 }