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1 | /* Copyright (C) 1993, 1996, 1997 Free Software Foundation, Inc. |
2 | This file is part of the GNU IO Library. | |
96aa2d94 | 3 | |
40a55d20 UD |
4 | This library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU General Public License as | |
6 | published by the Free Software Foundation; either version 2, or (at | |
7 | your option) any later version. | |
96aa2d94 | 8 | |
40a55d20 UD |
9 | This library is distributed in the hope that it will be useful, but |
10 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | General Public License for more details. | |
96aa2d94 | 13 | |
40a55d20 UD |
14 | You should have received a copy of the GNU General Public License |
15 | along with this library; see the file COPYING. If not, write to | |
16 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, | |
17 | MA 02111-1307, USA. | |
96aa2d94 | 18 | |
40a55d20 UD |
19 | As a special exception, if you link this library with files |
20 | compiled with a GNU compiler to produce an executable, this does | |
21 | not cause the resulting executable to be covered by the GNU General | |
22 | Public License. This exception does not however invalidate any | |
23 | other reasons why the executable file might be covered by the GNU | |
24 | General Public License. */ | |
96aa2d94 RM |
25 | |
26 | #include "libioP.h" | |
27 | ||
28 | int | |
29 | _IO_ungetc (c, fp) | |
30 | int c; | |
31 | _IO_FILE *fp; | |
32 | { | |
7c713e28 | 33 | int result; |
96aa2d94 RM |
34 | CHECK_FILE (fp, EOF); |
35 | if (c == EOF) | |
36 | return EOF; | |
68dbb3a6 | 37 | _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp); |
7c713e28 RM |
38 | _IO_flockfile (fp); |
39 | result = _IO_sputbackc (fp, (unsigned char) c); | |
68dbb3a6 | 40 | _IO_cleanup_region_end (1); |
7c713e28 | 41 | return result; |
96aa2d94 RM |
42 | } |
43 | ||
ca34d7a7 | 44 | #ifdef weak_alias |
96aa2d94 | 45 | weak_alias (_IO_ungetc, ungetc) |
ca34d7a7 | 46 | #endif |