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0261d33f | 1 | /* Copyright (C) 1993,1996,1997,1998,2002,2003 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
96aa2d94 | 3 | |
41bdb6e2 AJ |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
96aa2d94 | 8 | |
41bdb6e2 AJ |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
40a55d20 | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 12 | Lesser General Public License for more details. |
96aa2d94 | 13 | |
41bdb6e2 AJ |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. | |
96aa2d94 | 18 | |
41bdb6e2 AJ |
19 | As a special exception, if you link the code in this file with |
20 | files compiled with a GNU compiler to produce an executable, | |
21 | that does not cause the resulting executable to be covered by | |
22 | the GNU Lesser General Public License. This exception does not | |
23 | however invalidate any other reasons why the executable file | |
24 | might be covered by the GNU Lesser General Public License. | |
25 | This exception applies to code released by its copyright holders | |
26 | in files containing the exception. */ | |
96aa2d94 RM |
27 | |
28 | #include "libioP.h" | |
29 | ||
30 | int | |
31 | _IO_ungetc (c, fp) | |
32 | int c; | |
33 | _IO_FILE *fp; | |
34 | { | |
7c713e28 | 35 | int result; |
96aa2d94 RM |
36 | CHECK_FILE (fp, EOF); |
37 | if (c == EOF) | |
38 | return EOF; | |
0261d33f | 39 | _IO_acquire_lock (fp); |
77fe0b9c | 40 | result = INTUSE(_IO_sputbackc) (fp, (unsigned char) c); |
0261d33f | 41 | _IO_release_lock (fp); |
7c713e28 | 42 | return result; |
96aa2d94 RM |
43 | } |
44 | ||
ca34d7a7 | 45 | #ifdef weak_alias |
96aa2d94 | 46 | weak_alias (_IO_ungetc, ungetc) |
ca34d7a7 | 47 | #endif |